Collapsible filter bag, filter bag support assembly, and filter bag assembly

Abstract

Foldable filter bags, filter bag support assemblies, and filter bag assemblies are described herein. These foldable filter bags, filter bag support assemblies, and filter bag assemblies can be used in air filtration systems to remove particulate matter from air or other gases. Methods of using these air filtration systems and methods of assembling these filter bag assemblies are also described.

Description

[0001] This article describes collapsible filter bags, filter bag support assemblies, filter bag assemblies, and filtration systems, as well as the corresponding methods.

[0002] Many industries encounter particulate matter suspended in the atmosphere. In some industries, this particulate matter is a valuable product (e.g., starch), and it would be beneficial if the suspended particulate matter could be recycled and reintroduced into the processing. For other industries (e.g., metal or wood processing), there may be a desire to remove particulate matter from the air to provide a cleaner working environment.

[0003] Some systems used to clean air or other gas streams carrying particulate matter include filter bags (sometimes called filter bags) located within a housing. These filter bags are typically constructed of filter media, such as fabric, pleated paper, etc. A gas stream contaminated with particulate matter typically passes through the housing, causing the particulate matter to be captured and retained by one or more filter bags.

[0004] An air filtration system typically consists of a clean air chamber and a dirty air chamber. These two chambers are separated by a structure commonly referred to as a tube sheet. The tube sheet has multiple openings that allow air to pass between the clean air chamber and the dirty air chamber. Filter bags are positioned above the openings so that particulate-laden air (dirty air) introduced into the dirty air chamber must pass through the filter bags to move into the clean air chamber. Particulate matter in the dirty air is collected on the filter bags as the air moves through them.

[0005] Clean air is exhausted from the clean air chamber into the environment or recirculated for other uses. See, for example, U.S. Patent Nos. 3,942,962 (Duyckinck), 4,218,227 (Frey), 4,424,070 (Robinson), 4,436,536 (Robinson), 4,443,237 (Ulvestad), 4,445,915 (Robinson), 4,661,131 (Howeth), and 5,207,812. (Tronto et al.), U.S. Patent No. 4,954,255 (Muller et al.), U.S. Patent No. 5,222,488 (Forsgren), U.S. Patent No. 5,211,846 (Kott et al.), U.S. Patent No. 5,730,766 (Clements), U.S. Patent No. 6,090,173 (Johnson et al.), U.S. Patent No. 6,902,592 (Green et al.), and U.S. Patent No. 7,641,708 (Kosmider et al.).

[0006] Because the filter bag traps particulate matter, the flow through the system is suppressed, and the filter bag can be periodically cleaned to increase the airflow through the system. Cleaning can be accomplished by periodically pulse-jetting a main jet of pressurized air into the interior of the filter bag to reverse the airflow through it, thereby causing the collected particulate matter to be expelled from the filter bag. The pressurized air can be directed into a pulse collector, as described, for example, in U.S. Patent Nos. 3,942,962 (Duyckinck), 4,218,227 (Frey), 6,090,173 (Johnson et al.), 4,395,269, 6,902,592 (Green et al.), 7,641,708 (Kosmider et al.), and U.S. Patent Application Publication US2006 / 0112667 A1. Summary of the Invention

[0007] This document describes a collapsible filter bag, a filter bag support assembly, and a filter bag assembly. The collapsible filter bag, filter bag support assembly, and filter bag assembly can be used in air filtration systems to remove particulate matter from air or other gases. Methods for using the air filtration system and methods for assembling the filter bag assembly are also described.

[0008] In one or more embodiments, the foldable filter bag described herein includes a sealing sleeve and an adapter strap. The adapter strap is positioned on, and optionally attached to, the outer surface of the filter medium forming the filter bag body before the filter bag opening is folded back, and the sealing sleeve is attached to the inner surface of the filter medium forming the filter bag body. When the filter bag opening is folded back as described herein, the adapter strap is located within the adapter pouch formed by the folded portion of the filter bag and can be used to advance the bag opening and body of the filter bag onto a bag support (e.g., a retainer), while the sealing sleeve is exposed on the outside of the folded portion, where a seal can be formed to prevent unwanted passage of air and particulate matter during use of the filter bag.

[0009] The relatively simple arrangement of the fittings and sealing sleeves results in filter bags that are relatively easy to manufacture, simplifying the installation of the filter bags on the retainer and providing a relatively robust seal around the bag opening when installed in a collector.

[0010] In one or more embodiments, the filter bag support assembly described herein includes a flange assembly comprising a base and a clamp, wherein a retainer is attached to the base. The base includes a channel surrounding an orifice, and the clamp includes one or more guide vanes that extend into the channel when the base and clamp are assembled together. In one or more embodiments, the channel and the one or more guide vanes may cooperate to help properly position the filter bag on the filter bag support assembly.

[0011] In one or more embodiments, the filter bag assembly described herein may include a folded filter bag combined with a filter bag support assembly. When the folded filter bag and the filter bag support assembly are used together, one or more guide vanes on the clamp may be used to advance the bag opening along the retainer of the filter bag support assembly, wherein the one or more guide vanes are used to properly position the adapter straps and folded portions of the filter bag into channels provided in the base, while also properly positioning the sealing sleeve between the clamp and the base to form a robust seal at the interface between the base and the clamp of the flange assembly.

[0012] The pleated filter bags, filter bag support assemblies, and filter bag assemblies described herein may be particularly useful in filtration systems designed for industrial air filter applications, where particulate matter must be removed from relatively large volumes of contaminated air. Therefore, the size of the pleated filter bags and filter bag assemblies must be determined to handle those air volumes and the particulate matter associated with those volumes. Generally, the filter bags described herein can have a bag length of 0.3 meters or more, 0.5 meters or more, or even 1 meter or more, measured from the bag opening to the closed end. The associated bag height (measured transversely to the bag length) can be 0.2 meters or more, 0.3 meters or more, 0.4 meters or more, or 0.5 meters or more.

[0013] In one or more embodiments, the filter bag assembly includes a flange assembly, a retainer attached to the flange assembly, and a folded filter bag mounted on the retainer, wherein the opening is at the flange assembly. When installed in the stale air chamber of a filtration system, a seal is provided between the flange assembly and the tube sheet defining the stale air chamber by applying a sealing force at the end of the filter bag assembly positioned on the side of the stale air chamber opposite to the tube sheet, near the entry panel. This sealing force is transmitted to the flange assembly via the retainer.

[0014] A sealing force is provided at the end of the filter bag assembly, and this force is transmitted to the flange assembly via a retainer, allowing the filter bag (and filter bag assembly) to be removed and replaced via an access port on an access panel positioned across the contaminated air chamber. Therefore, the used filter bag (and the particulate matter collected thereon) does not pass through and potentially contaminate the clean air chamber of the filtration system.

[0015] Another potential advantage of providing and transmitting sealing force at the end of the filter bag assembly and transmitting that force to the flange assembly via the retainer is that other components (e.g., pulse generators, etc.) do not need to be removed or even partially disassembled to accommodate the removal and replacement of the filter bag.

[0016] When a filter bag is used, forming a seal by transmitting sealing force via a retainer located inside the filter bag can also improve pulse cleaning of at least some types of particulate matter, because the rapid acceleration (sometimes called "bag lock-up") associated with pulse cleaning of some filter bags can be preserved (compared to pulse cleaning of, for example, rigid filter cartridges).

[0017] In one or more embodiments, pulse cleaning of the filter bag causes the side surfaces of the filter bag to accelerate rapidly outward. This rapid outward acceleration can cause particulate matter collected on those side surfaces to detach, with the detached particulate matter falling into the funnel of the filtration system under gravity.

[0018] The forces applied to the filter bag during pulse cleaning, particularly those applied to the seal formed between the clamp and the base of the flange assembly holding the filter bag, can be significant. One or more embodiments of pleated filter bags, including both adapting straps and sealing straps, as described herein, may be particularly useful in ensuring proper placement of the filter bag opening within the flange assembly. This proper placement can help control the forces experienced at the junction between the pleated filter bag opening and the flange assembly, reducing the likelihood of unfiltered air escaping and / or leaking through this junction.

[0019] In one or more embodiments, the collapsible filter bags and filter bag assemblies described herein may include filter bags of any suitable shape, although one or more embodiments of the filter bag may be in the form of triangular filter bags, which can be described as having a triangular prism shape, wherein the height or length of the prism is arranged generally horizontally within the polluted air chamber and the bottom surface of the triangular filter bag faces downward. In one or more embodiments, the bottom surface of the filter bag accelerates rapidly downward during pulse cleaning. Therefore, particulate matter detached from the bottom surface of the filter bag during pulse cleaning is advantageously driven directly into the funnel of the filtration system by the force of the moving filter media plus gravity.

[0020] In one or more embodiments of a generally horizontally arranged triangular filter bag having the shape of a triangular prism with a downward-facing bottom surface, the width of the bottom surface may be less than the height of the side surfaces measured from the top vertex of the triangular filter bag (wherein the width of the bottom surface is measured between the vertices defining the bottom surface in a plane generally transverse to the height / length of the prism, and the height of the side surfaces is measured between the top and bottom vertices defining the side surfaces). In one or more embodiments of a generally horizontally arranged triangular filter bag having the shape of a triangular prism with a downward-facing bottom surface, the triangular bag and / or the holder for supporting them may be described relative to the included angle formed between the side surfaces at the apex of the triangle. In one or more embodiments of a triangular filter bag including a triangular end cap attached to a tubular body, the triangular end cap defines a height between the highest point and the bottom edge when projected onto a flat surface along a bag axis extending from the bag opening to the triangular end cap, and also defines a width across the bottom edge between the side edges.

[0021] In one or more embodiments, filtration systems using generally horizontally arranged filter bags with a triangular cross-section, as described herein, can exhibit improved particle carrying capacity because the filter media forming the bottom surface or base of the triangle faces downwards. In one or more embodiments, downward-facing filter media may be less susceptible to particle carrying capacity during use compared to upward-facing filter media (in addition to enhancing pulse cleaning by releasing detached particulate matter downwards, where particulate matter can, for example, fall directly into a funnel located below the filter bag).

[0022] Furthermore, by limiting the width of the bottom surface of the triangular filter bag, the side surfaces of the triangular filter bag assembly form a relatively steep vertical angle with generally vertical side surfaces. These generally vertical side surfaces can be used to limit particle load on the side surfaces (as compared to side surfaces arranged at a shallower angle, for example). As a result of the relatively steep vertical angle, the generally vertical side surfaces also promote the release of particulate matter collected on those side surfaces during the pulse cleaning process.

[0023] In one or more embodiments of the filtration system comprising triangular filter bags described herein, the filter bags are supported in a contaminated air chamber such that the filter bags and their support assemblies (e.g., flange assemblies, retainers, etc.) can be removed and replaced without passing through the clean air chamber of the filtration system. This limits or prevents contamination of the clean air chamber by particulate matter detached during the removal of the used filter bags associated with the removal of the used filter bags through the clean air chamber.

[0024] Filtration systems that include one or more of the various features and components described herein can provide one or more advantages, such as improved energy efficiency, reduced noise generation, etc., by reducing pressure drop within the filtration system during both the main flow operation of the filter element and the pulse cleaning process in one or more embodiments (wherein the main flow operation occurs when the filtration system removes particulate matter from the stale airflow), (in both the main flow operation of the filter bag and the pulse cleaning process), reducing frictional losses in the filtration system, and improving particulate carrying characteristics (thus potentially requiring fewer cleaning pulses).

[0025] In one or more embodiments, these advantages may have a synergistic effect, i.e., energy efficiency, noise reduction, etc., can be improved by using two or more of the features and / or components in the same filtration system together.

[0026] In a first aspect, one or more embodiments of the filter bag as described herein include: a body including a bag opening and a closed end, the body extending from the bag opening to the closed end along a bag axis extending between the bag opening and the closed end, wherein the body includes a filter medium forming a tubular shape between the bag opening and the closed end; a sealing sleeve attached to the tubular filter medium forming the body, the sealing sleeve being attached to an inner surface of the filter medium near the bag opening, the sealing sleeve extending around the entire periphery of the bag opening; and an adapter belt, the adapter belt being positioned... Located on a filter medium forming a tubular shape, the adapter tape is positioned between a sealing sleeve and a closed end, and is positioned on the outer surface of the filter medium; wherein the filter medium forming the main body between the sealing sleeve and the adapter tape is configured to be folded such that an adapter pouch is formed in the filter medium between the sealing sleeve and the adapter tape, wherein the adapter tape is located in the adapter pouch and the sealing sleeve is located outside the adapter pouch, and wherein, when moved along the bag axis away from the closed end, after the adapter pouch is formed, the bag opening is positioned between the adapter tape and the closed end of the main body.

[0027] In a second aspect, one or more embodiments of the filter bag support assembly as described herein include: a flange assembly including a base and a clamp, the flange assembly including a clean air outlet extending through the base and the clamp; a retainer including a first retainer end attached to the base of the flange assembly, the retainer extending in retainer length to a second retainer end remote from the base, the retainer defining a retainer axis extending between the first retainer end and the second retainer end; wherein the base includes a base plate facing the clamp and a base orifice for the clean air outlet of the flange assembly contained in the base, wherein the base includes a channel surrounding the base orifice extending away from the clamp; wherein the clamp includes a clamp plate including a clamp orifice for the clean air outlet of the flange assembly contained in the clamp, the clamp further including a guide vane positioned along the periphery of the clamp orifice, wherein the guide vane extends into the channel surrounding the base orifice when the clamp is attached to the base and the retainer is located within the clamp orifice.

[0028] In a third aspect, one or more embodiments of the filter bag assembly as described herein include: a flange assembly including a base and a clamp, the flange assembly including a clean air outlet extending through the base and the clamp; a retainer including a first retainer end attached to the base, the retainer extending in length to a second retainer end remote from the base; a filter bag including a bag opening attached to the flange assembly and a closed end opposite to the bag opening, the filter bag including a tubular body surrounding the retainer such that the retainer is received within the filter bag, wherein the tubular body is formed of a filter medium, wherein the filter bag further includes: a sealing sleeve attached to the filter medium forming the tubular body, the sealing sleeve being attached to the filter medium near the bag opening, the sealing sleeve extending around the entire periphery of the bag opening; and an adapter band attached to the filter medium forming the tubular shape, the adapter band being located between the sealing sleeve and the closed end; wherein the sealing sleeve... The filter media forming the body between the adapter tape and the adapter tape is folded to form an adapter pouch between the sealing sleeve and the adapter tape, wherein the adapter tape is located within the adapter pouch and the sealing sleeve is located outside the adapter pouch; wherein the base of the flange assembly includes a base plate and a base orifice defining a clean air outlet of the flange assembly within the base; wherein the clamp of the flange assembly includes a clamp plate including a clamp orifice for a clean air outlet of the flange assembly contained within the clamp, the clamp further including A guide vane is positioned around the periphery of the clamp orifice; wherein an adapter band is located between the guide vane and the base plate on the clamp; and wherein, when the clamp is attached to the base, a sealing sleeve is positioned between the base plate and the clamp plate, and the adapter band is located between the guide vane and the base plate, wherein the sealing sleeve forms a seal between the base and the clamp around the clean air outlet formed by the base orifice and the clamp orifice, such that air entering or leaving the filter bag must pass through the clean air outlet or the filter medium forming the filter bag.

[0029] In a fourth aspect, one or more embodiments of the filter bag assembly as described herein include: a flange assembly including a base, a clamp, and a transition flange located between the base and the clamp, the flange assembly including a clean air outlet extending through the base, the clamp, and the transition flange; a retainer including a first retainer end attached to the base, the retainer extending in retainer length to a second retainer end remote from the base; a filter bag including a bag opening attached to the flange assembly and a closed end opposite to the bag opening, the filter bag including a tubular body surrounding the retainer such that the retainer is received within the filter bag, wherein the tubular body is formed of a filter medium, wherein the filter bag further includes a sealing sleeve attached to the filter medium forming the tubular body, the sealing sleeve being attached to the filter medium near the bag opening, the sealing sleeve extending around the entire periphery of the bag opening; and its In the embodiment, the base of the flange assembly includes a base plate and a base orifice defining a clean air outlet of the flange assembly within the base; wherein the clamp of the flange assembly includes a clamp plate including a clamp orifice of the clean air outlet of the flange assembly contained within the clamp, the clamp further including positioning guide vanes along the periphery of the clamp orifice; wherein the transition flange includes a flange orifice aligned with the base orifice and the clamp orifice, wherein the clean air outlet is located within the flange orifice, and wherein a portion of the transition flange is located between a sealing sleeve and the clamp plate; and wherein, when the clamp is attached to the base, the sealing sleeve is positioned between the base and the clamp, wherein the sealing sleeve forms a seal around the clean air outlet formed by the base orifice and the clamp orifice between the base, the transition flange, and the clamp, such that air entering or leaving the filter bag must pass through the clean air outlet or the filter medium forming the filter bag.

[0030] In a fifth aspect, one or more embodiments of the air filtration system described herein include: a housing comprising: a tube sheet dividing the internal volume of the housing into a clean air chamber and a dirty air chamber; a dirty air inlet configured to deliver dirty air into the dirty air chamber; a clean air outlet configured to remove clean air from the clean air chamber; and a filter bag assembly as described herein, located within the dirty air chamber.

[0031] In a sixth aspect, one or more embodiments of a method for removing particulate matter from polluted air using an air filtration system as described herein include delivering polluted air into a polluted air chamber through a polluted air inlet and removing clean air from the clean air chamber through a clean air outlet.

[0032] In a seventh aspect, one or more embodiments of a method for mounting a collapsible filter bag on a filter bag support assembly to provide one or more embodiments of a filter bag assembly as described herein include: folding the bag opening such that an adapter strap is located in an adapter pouch; positioning a clamp of a flange assembly of the filter bag support assembly onto the filter bag, wherein the clamp includes guide vanes located in the adapter pouch and a tubular body of the filter bag extends through a clamp orifice in the clamp; advancing the filter bag and the clamp onto a retainer attached to a base; and attaching the clamp to the base, wherein a sealing sleeve on the filter bag forms a seal around the clamp orifice and a base orifice in the base such that air entering or leaving the filter bag must pass through the base orifice or the filter medium forming the filter bag.

[0033] In an eighth aspect, one or more embodiments of a method for mounting a filter bag on a filter bag support assembly to provide one or more embodiments of a filter bag assembly as described herein include: positioning a clamp of a flange assembly of the filter bag support assembly onto the filter bag, wherein a tubular body of the filter bag extends through a clamp orifice in the clamp; advancing the filter bag and the clamp onto a retainer attached to a base; positioning a transition flange between the clamp and the base, wherein the transition flange includes a flange orifice, and wherein the clamp includes guide vanes located in the flange orifice; and attaching the clamp to the base, wherein a sealing sleeve on the filter bag forms a seal around a base orifice in the base such that air entering or leaving the filter bag must pass through the base orifice or the filter medium forming the filter bag.

[0034] This document also describes the use of any filtration systems, filter bag assemblies, and collapsible filter bags described herein for the removal of particulate matter from polluted air (or any other gas).

[0035] Unless otherwise expressly indicated by the context, the singular forms “a,” “an,” and “the” used herein and in the appended claims include plural references. Thus, for example, a reference to “a” or “the” component can include one or more components and their equivalents known to those skilled in the art. Furthermore, the term “and / or” means one or all of the listed elements or a combination of any two or more of the listed elements.

[0036] It should be noted that the term "comprising" and its variations are not restrictive in the context of the accompanying description. Furthermore, "a," "an," "the," "at least one," and "one or more" are used interchangeably herein.

[0037] The above description is not intended to depict every embodiment or implementation of the foldable filter bags, filter bag support assemblies, filter bag assemblies, filtration systems, and methods described herein. Rather, a more complete understanding of the invention will become apparent and understood from the following description, taken in conjunction with the accompanying drawings and illustrative embodiments and claims. Attached Figure Description

[0038] Figure 1 This is a side view of an illustrative embodiment of a filter bag before the filter bag opening is folded, as described herein.

[0039] Figure 1A yes Figure 1 The filter bag along Figure 1 The cross-sectional view taken by line 1A-1A in the diagram.

[0040] Figure 2 As described in this article Figure 1 The filter bag is shown in a side view after the filter bag opening has been folded.

[0041] Figure 2A yes Figure 2 The filter bag along Figure 2 The cross-sectional view taken by line 2A-2A in the diagram.

[0042] Figure 3 yes Figure 1 The end view of the filter bag taken along the bag axis 11.

[0043] Figure 4 This is an exploded perspective view of an illustrative embodiment of a filter bag support assembly as described herein, the filter bag support assembly including a base having a retainer extending therefrom and a clamp positioned for advancing on the retainer toward the base.

[0044] Figure 5 yes Figure 4 An enlarged perspective view of the back of the base and a portion of the retainer of the filter bag support assembly depicted in the figure.

[0045] Figure 6 This occurs after the clamp is on the retainer and moves towards the base. Figure 4 An enlarged perspective view of the back of the base of the filter bag support assembly.

[0046] Figure 7 yes Figure 6 The flange assembly depicted in the figure is along Figure 6 The enlarged cross-sectional view taken by line 7-7 in the figure.

[0047] Figure 8 yes Figure 4An exploded perspective view of a filter bag support assembly, in which a folded filter bag of one illustrative embodiment is fitted onto a clamp and partially advanced onto a retainer extending from the base of the flange assembly.

[0048] Figure 9 The folded filter bag is positioned on it. Figure 8 The clamps of the filter bag support assembly are along such Figure 8 The end view taken from the bag axis 11 / cage axis 51 as seen in the image.

[0049] Figure 10 This is after the clamps and folded filter bags are assembled with the base of the flange assembly. Figure 8 The filter bag assembly along Figure 8 The cross-sectional view taken by line 10-10 (where the cage features have been removed for clarity).

[0050] Figure 11A This is a partial cross-sectional view of another illustrative embodiment of a filter bag before the filter bag opening is folded, as described herein, wherein the view is similar to... Figure 1A The view.

[0051] Figure 11B As described in this article, this occurs after folding the opening of the filter bag. Figure 11A A partial cross-sectional view of the filter bag (where the view is similar to) Figure 2A (view).

[0052] Figure 11C This refers to the assembly of the filter bag with the clamp and base of the flange assembly of the illustrative embodiment, as described herein. Figure 11B A cross-sectional view of a folded filter bag (where the view is similar to) Figure 10 (The view seen in the middle).

[0053] Figure 12 This is a cross-sectional view of an alternative clamp that can be used with one or more embodiments of the flange assembly described herein.

[0054] Figure 13 This is as described herein, after assembling the filter bag with the clamp and base of another illustrative embodiment of the flange assembly. Figure 11B A cross-sectional view of a folded filter bag (where the view is similar to) Figure 10 and Figure 11C The view shown in the image does not include the channel for receiving the adapter tape, except for the base of the flange assembly.

[0055] Figure 14This is a perspective view of an illustrative embodiment of a transition flange that can be used in one or more embodiments of a filter bag support assembly and a filter bag assembly to adapt these assemblies to conventional non-folded filter bags.

[0056] Figure 15 This is an illustrative embodiment of the filter bag assembly as described herein. Figure 14 A cross-sectional view of the transition flange of the filter bag assembly, which includes a flange assembly with a base and clamps (wherein this view is similar to...). Figure 10 and Figure 11C (The view seen in the middle).

[0057] Figure 16 This is a perspective view of an illustrative embodiment of the filtering system described herein.

[0058] Figure 17 yes Figure 16 The side view of the filtration system depicted in the figure.

[0059] Figure 18 yes Figure 16 and Figure 17 The top view of the filtration system depicted in the image.

[0060] Figure 19A yes Figures 16 to 18 The filtration system along Figure 18 The cross-sectional view taken by line 19A-19A in the diagram.

[0061] Figure 19B When the system stops running Figure 18 The filtration system along Figure 18 The cross-sectional view taken by line 19B-19B in the diagram.

[0062] Figure 19C During the pulse cleaning event Figure 18 The filtration system along Figure 18 The cross-sectional view taken by line 19B-19B in the diagram.

[0063] Figures 19D to 19F Alternative embodiments of filter guides and corresponding guide orifices that may be provided in one or more embodiments of a filtration system as described herein are depicted.

[0064] Figure 19G yes Figures 16 to 18 The filtration system along Figure 18 The cross-sectional view taken by line 19G-19G in the diagram.

[0065] Figure 20This is a schematic diagram of components of an illustrative embodiment of a filtration system as described herein, showing a seal formed using a filter bag assembly as described herein.

[0066] Figure 21A This is a perspective view of a portion of a tube sheet, wherein, as described herein, a filter bag assembly of an illustrative embodiment is supported on a filter guide of an illustrative embodiment.

[0067] Figure 21B An alternative embodiment of a bag support that may be provided in one or more embodiments of a filtration system and filter bag as described herein is depicted.

[0068] Figure 21C Another alternative embodiment of a bag support that may be provided in one or more embodiments of a filtration system and filter bag as described herein is depicted.

[0069] Figure 22A This is a perspective view of an illustrative embodiment of an access panel, including an illustrative embodiment of an access panel that includes a cover for closing the access ports through which the filter bag assembly of the filtration system passes during removal and replacement.

[0070] Figure 22B This is a perspective view of an alternative illustrative embodiment of an inlet panel and a cover for closing the inlet port, wherein the cover includes protrusions whose shape is defined to complement the filter bag assembly.

[0071] Figure 23 This is a diagram of an illustrative embodiment of a triangle formed by an illustrative embodiment of a filter bag used in a filtration system, as described herein.

[0072] Figure 24 This is a diagram of another illustrative embodiment of a triangle formed by another illustrative embodiment of a filter bag used in a filtration system, as described herein.

[0073] Figure 25 It is a description of Figure 24 The figure illustrates a possible arrangement of a pair of filter bags.

[0074] Figure 26 This is a diagram of another illustrative embodiment of a triangle formed by a filter bag for an air filtration system, as described herein.

[0075] Figure 27 This is a cross-sectional view of another illustrative embodiment of the filter bag assembly described herein, which includes an envelope-shaped filter bag supported on a flange assembly by a retainer.

[0076] Figure 28 This is a perspective view of an illustrative embodiment of a triangular filter bag that can be used in one or more embodiments of the filter bag assembly and air filtration system described herein.

[0077] Figure 29 Describes what can be used for construction Figure 28 The components of the illustrative embodiment of the triangular filter bag depicted herein.

[0078] Figure 30 It is a display Figures 28 to 29 A schematic diagram illustrating the relationship between features of the illustrative embodiment of the triangular end cap depicted. Detailed Implementation

[0079] In the following description of illustrative embodiments, reference is made to the accompanying drawings, which form a part of the following description and in which specific embodiments are illustrated by way of illustration. It should be understood that other embodiments may be used and structural changes may be made without departing from the scope of the invention.

[0080] Figures 1 to 3 Various views are depicted for one illustrative embodiment of the foldable filter bag as described herein. Figure 1 The image shows a filter bag 10 before the filter bag opening is folded. The filter bag 10 includes a bag opening 12 and a closed end 14. A body 16 extends from the bag opening 12 to the closed end 14 along a bag axis 11 that extends between the bag opening 12 and the closed end 14.

[0081] In one or more embodiments, the body 16 of the filter bag 10 may be tubular in shape between the bag opening 12 and the closed end 14. The tubular shape can take many different forms, including, for example, an envelope shape, a triangular shape (in which the body 16 includes two main sides intersecting along the top edge and a bottom edge connecting the two main sides), a rectangular shape, etc. Reference Figure 3 The filter bag 10 may be in the form of a triangular filter bag having two main sides A and B attached to each other near the top edge of the filter bag 10 (wherein the top edge of the filter bag 10 is the edge along which the optional bag support connector 40 is attached). The filter bag 10 also includes a bottom C that connects the bottom edges of the two main sides A and B of the filter bag 10 to form a generally triangular shape.

[0082] The body 16 of the filter bag 10 is primarily constructed of a filter medium configured to filter air or any other gas passing through the filter medium forming the body 16, wherein particulate matter entrained in the air or other gas is captured within or on the filter medium forming the body 16. Generally, the filter medium can preferably be sufficiently flexible to bend during a pulse cleaning process as described herein, wherein such bending or movement of the filter medium preferably results in the removal of at least a portion of the particulate matter captured within or on the filter medium forming the filter body 16. The construction of such filter media is well known to those skilled in the art and may include, for example, woven materials, nonwoven materials, paper, etc., selected according to the particulate matter to be collected, airflow requirements, strength requirements, etc. Suitable filter bags may be constructed of filter media comprising one or more of the following: polyester, polypropylene, aramid, polyester / PTFE materials in a woven and / or nonwoven configuration, etc.

[0083] In one or more embodiments, the filter bags described herein can be distinguished from filter cartridges based on their response to compressive forces guided between the filter bag opening and the closed end of the filter bag (i.e., the end of the bag positioned opposite the bag opening). In the absence of any external support (e.g., the internal retainer described herein as part of the filter bag support assembly and filter bag assembly), in one or more embodiments, the filter bags described herein will be positioned along a line extending through the bag opening to the closed end of the filter bag (e.g., along...). Figure 1 and Figure 2 The bag, as depicted in the diagram, deforms under a compressive force of 5 Newtons (approximately 1.1 pounds) guided by its axis 11. Apart from deformation, one or more embodiments of the filter bag used in the filter bag assembly described herein substantially do not transmit this compressive force. Instead, the filter element will deform minimally and will transmit most (if not all) of this compressive force. However, the flexibility that is the root cause of the filter bag's inability to transmit compressive force in the filter bag assembly and filtration system described herein is its ability to rapidly accelerate outward (sometimes referred to as "locking") in response to a cleaning pulse to remove particulate matter collected on the exterior of the filter media.

[0084] refer to Figures 1 to 3 , Figure 1 The filter bag 10 depicted includes a fitting strap 20 and a sealing sleeve 30, both of which are attached to a tubular filter medium forming a body 16. The filter medium forming the body 16 between the fitting strap 20 and the sealing sleeve 30 is configured to be folded such that a fitting pouch 18 is formed within the filter medium between the sealing sleeve 30 and the fitting strap 20. Figure 2 and Figure 2A (See both). For example, in Figure 2 and Figure 2A In both cases, the sealing sleeve 30 is located outside the adapter pouch 18.

[0085] As the bag moves away from the closed end 14 of the filter bag 10 along the bag axis 11, after the adapter pouch 18 is formed, the bag opening 12 is positioned between the adapter strap 20 and the closed end 14 of the body 16. This arrangement may be possible Figure 2 and Figure 2A The best view is in the middle.

[0086] Before the filter media of the body 16 is folded to form the fitting pouch 18, a sealing sleeve 30 is attached to the inner surface of the filter media forming the body 16, wherein the sealing sleeve 30 is located within the internal volume 13 of the filter bag 10, such as in, for example Figure 1A and Figure 3 As seen in [the image]. The sealing sleeve 30 extends around the entire perimeter of the bag opening 12, as in, for example... Figure 3 What I saw in the video.

[0087] Before the filter medium near the bag opening 12 of the filter bag 10 is folded to form the adapter pouch 18, the adapter tape 20 is located between the sealing sleeve 30 and the closed end 14 of the filter bag 10, wherein the adapter tape 20 is positioned on the outer surface of the filter medium forming the body 16 of the filter bag 10. As described herein, after the filter medium is folded to form the adapter pouch 18, the adapter tape 20 is located within the adapter pouch 18 but remains positioned on the outer surface of the body 16 of the filter bag 10 (wherein the outer surface of the filter medium is the surface of the filter medium facing away from the internal volume 13 of the filter bag 10). In one or more embodiments, the adapter tape 20 may be attached to the outer surface of the body 16.

[0088] In one or more embodiments, the adapter tape 20 may be provided as a discrete component attached to the outer surface of the filter medium of the filter body 16 forming the filter bag 10. In one or more embodiments, the adapter tape 20 may be provided as a multilayer filter medium formed by one or more of the following methods: sewing, adhesive bonding, thermal welding, chemical welding, etc. Alternatively, the adapter tape 20 may be provided as a flexible polymer component capable of conforming to the shape of the body 16 of the filter bag 10. The flexible material used to form such an adapter tape 20 may be in the form of a compressible material, such as foam (closed-cell, open-cell, etc.). In one or more embodiments, the adapter tape 20 may be formed of an elastic compressible material capable of returning to its original shape (or close to its original shape) after compression. In one or more other embodiments, the adapter tape may be formed of one or more layers of material exhibiting increased resistance to abrasion and / or tearing. In still other embodiments, the adapter tape for use in a filter bag as described herein may be formed of two or more components attached to the filter medium by any suitable technique or combination of techniques.

[0089] In one or more embodiments, the sealing sleeve 30 may be provided as a discrete component attached to the inner surface of the filter medium forming the body 16 of the filter bag 10. In one or more embodiments, the sealing sleeve 30 may be provided as a multilayer filter medium formed by one or more of the following methods: sewing, adhesive bonding, thermal welding, chemical welding, etc. Alternatively, the sealing sleeve 30 may be provided as a flexible polymer component capable of conforming to the shape of the body 16 of the filter bag 10. The flexible polymer material used to form such a sealing sleeve 30 may be in the form of a compressible material, such as foam (closed-cell, open-cell, etc.). In one or more embodiments, the sealing sleeve 30 may be formed of an elastic compressible material capable of recovering its original shape (or close to its original shape) after compression. In other embodiments, the sealing sleeve for use in a filter bag as described herein may be formed from two or more components attached to the filter medium by any suitable technique or combination of techniques.

[0090] In one or more embodiments of the filter bag described herein, the sealing sleeve 30 can be described as having an inner periphery 31 smaller than the inner periphery of the bag opening 12 defined by the filter medium before forming the adapter pouch 18 by folding the filter medium as described herein (see, for example...). Figure 3 ).

[0091] In one or more embodiments of the filter bag described herein, the adaptable strap 20 may extend around the entire periphery of the outer surface of the tubular body 16, as in, for example... Figure 3As seen in [the text]. In one or more embodiments, the adapter tape 20 can be described as defining an inner perimeter 21, which is equal to the outer perimeter of the body 16 as defined by the outer surface of the filter medium to which the adapter tape 20 is attached. In one or more alternative embodiments, the adapter tape of the filter bag as described herein may not extend around the entire perimeter of the outer surface of the tubular body 16; in other words, the adapter tape of the filter bag as described herein may have slits or gaps when moved around the perimeter of the body of the filter bag to which the adapter tape is attached.

[0092] In one or more embodiments, the sealing sleeve 30 can be described as being located between the adapter sleeve 20 and the closed end 14 of the filter bag 10 as it moves along the bag axis 11 away from the closed end 14 after the adapter pouch 18 is formed, such as in, for example Figure 2 and Figure 2A What I saw in the video.

[0093] refer to Figure 1A In one or more embodiments of the filter bag as described herein, the sealing sleeve 30 may have an axial sealing length 32 measured along the bag axis 11, and the adapting sleeve 20 may have an adapting sleeve length 22 measured along the bag axis 11. In one or more embodiments, the axial sealing length 32 of the sealing sleeve 30 is equal to or greater than the adapting sleeve length 22 of the adapting sleeve 20. In one or more alternative embodiments, the axial sealing length 32 of the sealing sleeve 30 is greater than the adapting sleeve length 22 of the adapting sleeve 20. One advantage of providing a sealing sleeve 30 having an axial sealing length 32 equal to or greater than the adapting sleeve length 22 of the adapting sleeve 20 is that compression of the sealing sleeve 30 can be more easily achieved when the adapting sleeve length 22 is not greater than the axial sealing length 32 of the sealing sleeve 30. When using the filter bag as described herein, compression of the sealing sleeve 30 may be important for forming a proper seal to prevent the unwanted passage of particulate matter.

[0094] Refer again Figure 1AThe adapter tape 20 may have an adapter tape thickness 24 measured in a direction transverse to the bag axis 11, and the sealing tape 30 may have a sealing tape thickness 34 also measured in a direction transverse to the bag axis 11. In one or more embodiments of the filter bag as described herein, the sealing tape thickness 34 of the sealing tape 30 may be equal to or greater than the adapter tape thickness 24 of the adapter tape 20. In one or more alternative embodiments, the sealing tape thickness 34 of the sealing tape 30 is greater than the adapter tape thickness 24 of the adapter tape 20. One advantage of providing a sealing tape 30 having a sealing tape thickness equal to or greater than the adapter tape thickness 24 of the adapter tape 20 is that compression of the sealing tape 30 can be more easily achieved when the adapter tape thickness 24 is not greater than the sealing tape thickness 34 of the sealing tape 30. When using the filter bag as described herein, compression of the sealing tape 30 may be important for forming a proper seal to prevent the unwanted passage of particulate matter.

[0095] refer to Figure 1A and Figure 2A The sealing sleeve 30 of one or more embodiments of the filter bag described herein can be described as having a proximal end 36 and a distal end 38 when moving along the bag axis 11 away from the closed end 14 of the filter bag 10. In other words, the proximal end 36 is positioned closer to the closed end 14 of the filter bag 10. In other words, the proximal end 36 of the sealing sleeve 30 is closer to the closed end 14 of the filter bag 10 than the distal end 38 of the sealing sleeve 30. In other words, the proximal end 36 of the sealing sleeve 30 is located between the closed end 14 of the body 16 and the distal end 38 of the sealing sleeve 30.

[0096] Similarly, the adapter tape 20 of one or more embodiments of the filter bag described herein can be described as having a proximal end 26 and a distal end 28 when moving along the bag axis 11 away from the closed end 14 of the filter bag 10. In other words, the proximal end 26 of the adapter tape 20 is closer to the closed end 14 of the filter bag 10 than the distal end 28 of the adapter tape 20. In other words, the proximal end 26 of the adapter tape 20 is located between the closed end 14 of the body 16 and the distal end 28 of the adapter tape 20.

[0097] In, for example Figure 2AAfter the adapter pouch 18 is formed, as seen in the diagram, the distal end 38 of the sealing sleeve 30 is positioned closer to the closed end 14 of the body 16 than the proximal end 26 of the adapter sleeve 20. One advantage of providing the sealing sleeve 30 with its distal end 38 positioned closer to the closed end 14 of the body 16 than the proximal end 26 of the adapter sleeve 20 is that compression of the sealing sleeve 30 can be more easily achieved when this arrangement of the sealing sleeve 30 and the adapter sleeve 20 is provided. Similarly, when using filter bags as described herein, compression of the sealing sleeve 30 may be important for forming a proper seal to prevent the unwanted passage of particulate matter.

[0098] In, for example Figure 2A Before the formation of the adapter pouch 18, as seen in the diagram, the proximal end 36 of the sealing sleeve 30 is separated from the distal end of the adapter sleeve 20 by a pouch length 19 that is twice the length of the adapter sleeve 22. In one or more alternative embodiments, the pouch length 19 may be greater than twice the sum of the thickness of the adapter sleeve 24 and the length of the adapter sleeve 22. This spacing between the adapter sleeve 20 and the sealing sleeve 30 allows for proper formation of the adapter pouch 18 and proper arrangement between the adapter sleeve 20 and the sealing sleeve 30. One advantage of providing these arrangements or spacings between the sealing sleeve 30 and the adapter sleeve 20 is that when the filter bag 10 is disposed in a filter bag assembly with channels as described herein, the sealing sleeve 30 can be more easily positioned outside the channels in which the adapter sleeve 20 can be positioned. Positioning the sealing sleeve 30 outside the channels in which the adapter sleeve 20 is located ensures that proper compression of the sealing sleeve 30 is more easily achieved. As noted herein, when using filter bags as described herein, compression of the sealing sleeve 30 may be important for forming a proper seal to prevent unwanted passage of particulate matter.

[0099] Another optional feature of one or more embodiments of the filter bag described herein is the addition of a bag support connector 40, which is attached to the body 16 of the filter bag 10 near the closed end 14 of the body 16. The bag support 40 may preferably be located outside the internal volume 13 of the body 16 of the filter back 10. In one or more embodiments, the bag support 40 may preferably include an opening 42 configured to receive a hook or other structure configured to support the filter bag at the closed end 14 of the filter bag 10. In one or more embodiments, the bag support connector 40 may be as simple as material rings attached to opposite sides of the body 16 of the filter bag 10, such as in… Figure 3 What I saw. Filter bag support assembly

[0100] The filter bag support assembly described herein is particularly well-suited for use with the folded filter bags described herein. References Figures 4 to 7 An illustrative embodiment of a filter bag support assembly 50 is depicted, wherein the depicted filter bag support assembly 50 includes a flange assembly comprising a base 60 and a clamp 80. The base 60 of the flange assembly includes a tube sheet face 63, which, in one or more embodiments, is configured to seal against the turbid air chamber side of the tube sheet of a filtration system as described herein. Although in Figures 4 to 7 It is not depicted, but the resilient seal can be provided on the tube sheet surface 63 of the base 60.

[0101] A flange assembly formed by the combination of the base 60 and the clamp 80 defines a clean air outlet extending through the base and the clamp, such that air (or any other gas) within the internal volume of the filter bag mounted on the filter bag support assembly enters or exits the internal volume through the filter media of the filter bag or the clean air outlet. Specifically, in the illustrative embodiment of the depicted filter bag support assembly 50, the clean air outlet includes a base orifice 64 formed in the base 60 and a clamp orifice 84 formed in the clamp 80, wherein the base orifice 64 and the clamp orifice 84 are aligned with each other when the clamp 80 is assembled onto the base 60, as described herein.

[0102] In an illustrative embodiment of the depicted filter bag support assembly 50, a retainer 70 is attached to a base 60, wherein the retainer 70 extends away from the base 60 to support a filter bag as described herein. The retainer 70 includes a first retainer end attached to the base 60 of the flange assembly, wherein the retainer extends in its retaining length to a second retainer end 72 positioned remotely from the base 60. The retainer 70 defines a retainer axis 51 extending between the first retainer end attached to the base 60 and the second retainer end 72 positioned remotely from the base 60.

[0103] An illustrative embodiment of the cage 70 depicted includes a strut 74 extending along the cage axis 51 away from the base 60, wherein the strut 74 terminates in a set of end struts 73 positioned away from the base 60. Figures 5 to 6 The cage 70 depicted also includes supports extending between the struts 74 to provide additional support for the filter bag positioned on the cage 70. The arrangement of the struts 74 and 73 depicted in the cage 70 provides only one example of a cage that can be used to support a filter bag in conjunction with the filter bag support assembly described herein.

[0104] The base 60 of the filter bag support assembly 50 includes a base plate 62 having a base surface facing the clamp 80 and a base orifice 64 containing a clean air outlet of a flange assembly in the base 60. The base 60 also includes a channel 66 surrounding the base orifice 64, wherein the channel extends away from the clamp 80 of the flange assembly.

[0105] The clamp 80 of the filter bag support assembly 50 includes a clamp plate 82 comprising a clamp orifice 84 that forms part of a clean air outlet extending through the base 60 and the clamp 80. An illustrative embodiment of the depicted clamp 80 further includes one or more guide vanes 86 positioned along the periphery of the clamp orifice 84. Reference Figure 6 and Figure 7 When the clamp 80 is attached to the base 60 and the retainer 70 is located within the clamp orifice 84, one or more guide vanes 86 extend into a channel 66 surrounding the base orifice 64 in the base 60.

[0106] The illustrative embodiment of the depicted clamp 80 includes an optional pair of reinforcing ribs 87 designed to provide structural rigidity to the clamp plate 82, such that the clamp plate 82 resists deformation when attached to the base 60 using, for example, stud bolts 67 extending through openings located above and below the clamp orifices 84, as in, for example... Figure 4 What I saw in the video.

[0107] An illustrative embodiment of the depicted clamp 80 includes a plurality of guide vanes 86 positioned around the periphery of a clamp orifice 84. Adjacent pairs of guide vanes 86 are spaced apart from each other around the periphery of the clamp orifice 84. Although the clamp 80 may be provided with as few as one guide vane 86, in one or more embodiments, this single guide vane extends around substantially the entire periphery of the clamp orifice 84, but providing a plurality of spaced-apart guide vanes 86 can provide advantages over a design including continuous guide vanes. For example, when using the clamp 80 to advance a filter bag onto a retainer 70, the spaced-apart guide vanes 86 can result in a reduced likelihood of engagement. In one or more embodiments, the guide vanes 86 may, together with an appropriate strap for folding the filter bag, form a curved path around the bag opening, which can aid in sealing.

[0108] In one or more embodiments of the filter bag support assembly including spaced-apart guide vanes 86 described herein, at the lower end, the guide vanes 86 may collectively occupy 30% or more, 40% or more, 50% or more, 60% or more, 70% or more, 80% or more, or 90% or more of the periphery of the clamping orifice 84. At the upper end, the guide vanes 86 may occupy less than the entire periphery of the clamping orifice 84.

[0109] In one or more embodiments of the filter bag support assembly described herein, the clean air outlet defined within the flange assembly (i.e., defined by the combination of the base aperture 64 and the clamp aperture 84) can be elongated, such that the clean air outlet defines a maximum height along the long axis and a maximum width less than the maximum height along the short axis transverse to the long axis. Figures 4 to 6 Specifically, the long axis will extend substantially vertically from the narrow ends of the base aperture 64 and the clamp aperture 84 to the opposite ends of the base aperture 64 and the clamp aperture 84, while the short axis will extend substantially transversely to the long axis. Both the long and short axes will extend substantially transversely to the cage axis 51. In one or more embodiments, the maximum height of the clean air outlet defined by the base aperture 64 and the clamp aperture 84 may be two, three, or four times greater than the maximum width to provide an elongated clean air outlet as defined herein.

[0110] Another optional feature that may be provided in conjunction with one or more embodiments of the filter bag support assembly as described herein is a guide orifice 90. The guide orifice 90 may be located outside the retainer 70 attached to the base 60 and the clean air outlet defined by the base orifice 64 and the clamp orifice 84. In one or more embodiments, the guide orifice 90 is configured to receive a guide track when the clamp 80 is attached to the base 60, and the flange assembly (formed by the base 60 and the clamp 80) is configured to advance along the guide track received in the guide orifice 90 when the clamp 80 is attached to the base 60. The guide orifice 90 may provide an opportunity to suspend the tube sheet end of the filter bag support assembly 50 (i.e., the end of the filter bag support assembly 50 including the base 60 and the clamp 80) to allow the filter bag support assembly to advance along the guide track toward the tube sheet, as described herein. The illustrative embodiment of the guide orifice 90 depicted is merely one example of many different guide orifices that can be used to support the filter bag support assembly described herein on a guide track as described herein.

[0111] In one or more embodiments, the guide aperture 90 may be formed in only one of the base 60 and the clamp 80. In one or more alternative embodiments, the guide aperture 90 may be formed in the clamp 80 of the flange assembly formed by the clamp 80 and the base 60. Filter bag assembly

[0112] Figure 8 It includes Figure 4 An exploded perspective view of an illustrative embodiment of a filter bag assembly with a filter bag support assembly, wherein... Figures 1 to 3 An illustrative embodiment of the folded filter bag 10 is fitted onto a clamp 80 and partially advanced onto a retainer 70 extending from the base 60 of the flange assembly. Figure 8 As seen in the image, the support column 74 of the retainer 70 attached to the base 60 extends into the internal volume 13 of the filter bag 10.

[0113] To complete the process of mounting the filter bag 10 onto the filter bag support assembly, the clamp 80 is advanced onto the retainer 70 until the clamp 80 is positioned adjacent to the base 60. When the clamp 80 is positioned adjacent to and attached to the base 60, the tubular body 16 of the filter bag 10 surrounds the retainer 70 such that the retainer 70 is accommodated within the filter bag 10.

[0114] For example Figure 2A and Figure 9 The guide vane 86 on the clamp 80 is positioned on the adapter pouch 18 of the filter bag 10 (see example). Figure 2A Afterwards, clamp 80 can be used to keep filter bag 10 open so that retainer 70 is first inserted into filter bag 10 and then filter bag 10 is pushed onto retainer 70. Figure 9 In the view, the internal volume 13 of the filter bag 10 is aligned with the clamp orifice 84 in the clamp 80, while the sealing sleeve 30 of the filter bag 10 is located outside the periphery of the clamp orifice 84. When positioned in this way, the sealing sleeve 30 is in a position forming a seal between the clamp 80 and the base 60 when the clamp 80 is fully advanced into the base 60. Although in Figure 9 Not visible in the view, but the guide flap 86 on the clamp 80 is positioned within the adapter pouch 18 formed just inside the sealing sleeve 30, and with the adapter pouch 18 located (as in, for example) Figure 2A (See the image) The appropriate matching straps are in contact.

[0115] Figure 10 This is a cross-sectional view of the flange assembly after the clamp 80 has advanced to the base 60, such that the sealing sleeve 30 is positioned between the base 60 and the clamp 80, and the adapting sleeve 20 is positioned within the channel 66 of the base 60. (See image) Figure 10 As seen in the image, the sealing sleeve 30 is positioned between the base plate 62 and the clamp plate 82. The adapting sleeve 20 is located between the guide vane 86 of the clamp 80 and the base plate 62.

[0116] The sealing sleeve 30 surrounds the base orifice 64 and the clamp orifice 84 (in Figure 10 In the view, the clamp orifice is located between opposing guide vanes 86, forming a clean air outlet that seals between the base 60 and the clamp 80. Through the seal formed between the base 60 and the clamp 80 by the sealing sleeve 30, air (or any other gas) entering or leaving the internal volume 13 of the filter bag must pass through the clean air outlet or the filter medium forming the body 16 of the filter bag 10. In one or more embodiments, the sealing sleeve 30 is preferably compressed between the base plate and the clamp. As used herein, the term "compressed" means that the sealing sleeve 30 has been at least partially deformed between the base plate 62 and the clamp 80.

[0117] In the illustrated embodiment depicted, the base 60 includes a channel 66 surrounding the base aperture 64, as in combination with... Figures 4 to 7 The filter bag support assembly is described. Channel 66 is surrounded by a base plate 62 and extends away from the clamp 80. The adapter strap 20 of the filter bag 10 is located in the channel 66 formed in the base 60.

[0118] While the sealing band 30 is typically fully compressed to form a seal between the base 60 and the clamp 80, in one or more embodiments, when the sealing band 30 is compressed to form a seal between the base 60 and the clamp 80 around the clean air outlet defined by the base orifice 64 and the clamp orifice 84, the guide vanes 86 on the clamp 80 may also slightly compress the adapter band 20 and the channel 66 of the filter bag 10. At least some compression of the adapter band 20 by the guide vanes 86 can help secure the filter media 16 in place between the base 60 and the clamp 80 in a manner that prevents or limits movement of the filter media 16, which could result in undesirable abrasion and / or tearing of the filter media 16 near the location of the guide vanes 86. Additionally, compression of the adapter band 20 can also help seal the filter bag 10 around the clean air outlet defined by the base orifice 64 and the clamp orifice 84.

[0119] In one or more embodiments, the sealing sleeve 30 can be described as surrounding a channel 66 between the base plate 62 and the clamp plate 82. With the channel 66 surrounded by the sealing sleeve 30, when the base 60 and the clamp are assembled with the appropriate mating band 20 and the sealing sleeve 30 held between them, the seal formed by the sealing sleeve 30 between the base 60 and the clamp 80 also extends continuously around the channel and the base orifice 64 / clamp orifice 84.

[0120] Other features of the filter bag 10 and the filter bag support assembly 50 can also be incorporated into Figures 8 to 10 In the filter bag assembly depicted, these optional features include, but are not limited to, a bag support connector 40, a plurality of guide vanes 86 peripherally positioned around a clamp orifice 84, a guide orifice 90, and an elongated clean air outlet. Alternative embodiments

[0121] Figures 11A to 11B An alternative embodiment of the filter bag 110 is described, and Figure 11C The filter bag 110 in the flange assembly is depicted as an alternative embodiment of the filter bag assembly including the filter bag 110.

[0122] Figures 11A to 11BOnly the portion of filter bag 110 near filter bag opening 112 is depicted, wherein a fitting strap 120 and a sealing sleeve 130 are attached to the tubular filter medium forming the body 116. The filter medium forming the body 116 near the sealing sleeve 130 is configured to be folded, such that when folded to form... Figure 11B Before the adapter pouch 118 depicted, the adapter pouch 118 is formed in the filter medium near the sealing sleeve 130 (in Figure 11B (See in the middle). For example Figure 11B As seen in the image, the adapter strap 120 is located inside the adapter pouch 118, and the sealing strap 130 is located outside the adapter pouch 118.

[0123] As the bag moves away from the closed end (not shown) of the filter bag 110 along the bag axis 111, after the adapter pouch 118 is formed, the bag opening 112 is positioned between the adapter pouch 118 and the closed end of the body 116 of the filter bag 110. In one or more embodiments, after the adapter pouch 18 is formed, the bag opening 112 may be positioned between the adapter strap 120 and the closed end of the body 116, because it may be preferable that the adapter strap 120 does not occupy the portion of the outer surface of the body 116 outside the adapter pouch 118, to avoid limiting the amount of filter media surface area available during filtration.

[0124] The illustrative embodiment adapted with 120 is compared to, for example... Figures 1 to 3 and Figure 10 One difference between the illustrative embodiments of the adapter strap 20 depicted is that the adapter strap 120 can be constructed from materials selected based on their resistance to abrasion and / or tearing caused by contact with guide flaps 86 of the clamps 80 used to assemble the filter bag assembly and secure the filter bags during use in the collector. For example, in one or more embodiments, the filter strap 120 can be made from one or more of the following materials: leather, fabric (woven / nonwoven), polymer film, coating (e.g., latex, etc.). While these materials can be compressible, they can be combined with those described above. Figures 1 to 3 The filter bags described herein are distinguished by the compressible material used to make the adapters, as they are folded within the adapter pouch 118, thereby forming a reinforced pouch within the adapter pouch 118.

[0125] Figure 11C A cross-sectional view taken transversely to the bag axis 111 / cage axis 151 (similar to) Figure 10 The cross-sectional view shown depicts an illustrative embodiment of assembling a bag 110 in a flange assembly including a base 160 and a clamp 180. Figure 11CIn this configuration, a sealing sleeve 130 is located between the base 160 and the clamp 180, while a matching sleeve 120 is located within a channel 166 in the base 160. Specifically, the sealing sleeve 130 is positioned between the base plate 162 and the clamp plate 182. The matching sleeve 120 is located between the guide vane 186 of the clamp 180 and the channel 166 in the base plate 182. The clamp 180 also includes reinforcing ribs 187 to increase the rigidity of the clamp 180.

[0126] The sealing sleeve 130 surrounds the clean air outlet formed by the base orifice 164 and the clamp orifice 184 (in Figure 11C In the view, the clean air outlet is located between opposing guide vanes 186, forming a seal between the base 160 and the clamp 180. Through the seal formed between the base 160 and the clamp 180 by the sealing sleeve 130, air (or any other gas) entering or leaving the internal volume 113 of the filter bag 110 must pass through the clean air outlet or the filter medium forming the body 116 of the filter bag 110. In one or more embodiments, the sealing sleeve 130 is preferably compressed between the base 160 and the clamp 180. Figure 11C What can also be seen is that the edge of the guide vane 186 is positioned in a reinforced pouch formed by the adapter strap 120 within the adapter pouch 118.

[0127] Figure 12 A cross-sectional view taken in a plane transverse to the cage axis 251 (similar to...) Figure 7 , Figure 10 and Figure 11C Another alternative embodiment of the clamp 280 is depicted in the view shown herein (which can be used in one or more embodiments of the filter bag support assembly and filter bag assembly described herein). The depicted clamp 280 includes a clamp plate 282, guide vanes 286, and reinforcing ribs 287.

[0128] The depicted clamp 280 further includes a sleeve 288 on the leading edge of the guide vane 286. In one or more embodiments, the sleeve 288 can be used to reduce the likelihood of the guide vane 286 abrading and / or tearing of the filter media of the filter bag during the assembly of the filter bag assembly and / or during use, regardless of the form of the adapter tape disposed on the adapter bag used with the clamp 280. In addition to increasing the surface area at the leading edge of the guide vane 286 and / or eliminating sharp edges, these advantages can also be achieved by providing one or more of the following characteristics: resilient compressibility, reduced friction, etc.

[0129] Figure 13Another alternative embodiment of the filter bag assembly is depicted in a cross-sectional view taken in a plane transverse to the bag axis 311 and the retainer axis 351, the filter bag assembly comprising a folded filter bag 310 assembled in a flange assembly including a base 360 ​​and a clamp 380. As in other illustrative embodiments of the filter bag assembly described herein, the filter bag 310 includes an adapter strap 320 and a sealing sleeve 320, wherein the sealing sleeve 320 is located in an adapter pouch 318 formed by folding back the bag opening 312 toward the closed end (not shown) of the filter bag 310.

[0130] The clamp 380 includes a clamp plate 382, ​​and guide vanes 386 and reinforcing ribs 387 as described herein in conjunction with other illustrative embodiments of the clamp, wherein a sealing sleeve 330 is compressed between the clamp 380 and the base 360 ​​to form a seal around a clean air outlet defined by a base opening 364 and a clamp opening 384.

[0131] Figure 13 One difference between the components depicted herein and other illustrative embodiments of the components described herein is that the base 360 ​​does not include channels configured to receive the adapter tape 320 and / or adapter pouch 318 of the filter bag 310. In the depicted embodiment, the base 360 ​​includes a flat base plate 362, wherein the tube plate surface 363 and the opposite side of the base plate 362 (that is, the side of the base plate 362 facing the clamp 380) are substantially flat. This configuration simplifies the manufacture of the base 360 ​​compared to various versions of bases that include channels as described herein.

[0132] Although the filter bag assembly and the filter bag support components used in the filter bag assembly are adapted for use with foldable filter bags as described herein, in one or more embodiments, these components may be adapted for use with conventional filter bags that are not folded using the transition flange as described herein. A potential advantage of providing and using the transition flange as described herein is that the transition flange can allow operation of the filtration system if a filter bag configured for folding (providing all the advantages associated with the foldable filter bag as described herein) is unavailable.

[0133] refer to Figures 14 to 15 The illustrative embodiment of the depicted transition flange 390' includes a flange orifice 394' that aligns in use with a base orifice 364' in the base 360' and a clamp orifice 384' in the clamp 380'. Therefore, a clean air outlet (at least partially) formed by the flange assembly as described herein is located within the flange orifice 394', as... Figure 15As depicted herein. The transition flanges used in one or more embodiments of the components described herein may be formed of one or more materials that are compressible and / or incompressible under the forces used in the components described herein. It may be preferred that the transition flanges be impermeable to air or other gases under the conditions under which they are used in the components described herein. Suitable materials for transition flanges include, but are not limited to, metals, polymers, etc.

[0134] During assembly, when the clamp 380' is attached to the base 360', the sealing sleeve 330' of the filter bag 310' (attached to the tubular body 316') is located between the base 360' and the clamp 380'. In one or more embodiments, the sealing sleeve 330' forms a seal between the base 360' and the transition flange 390' around the clean air outlet, as described herein. In one or more embodiments, the transition flange 390' may also form a seal with the surface 382' of the clamp 380'. During the formation of this seal, the sealing sleeve 330' may be compressed between the base 360' and the transition flange 390'. Figure 15 As depicted, a portion of the transition flange 390' is located between the sealing sleeve 330' and the clamping plate 382' of the clamp 380'.

[0135] In one or more embodiments of the transition flange described herein, flange orifice 394' (see Figure 14 This may include one or more guide vane recesses 396' in the periphery of the flange aperture 394'. As described herein, the guide vane recesses 396' are provided for receiving guide vanes on a jig of one or more embodiments or for providing clearance for these guide vanes (see, for example...). Figure 4 (Guide fin 86 on clamp 80). Figure 15 In the middle, the clamp 380' includes a guide wing 386' in the notch 396' of the transition flange 390'.

[0136] In embodiments of components including channels in a base as described herein (see, for example) Figure 4 A portion of the transition flange 390' may be located between the channel 366' surrounding the base orifice 364' and the clamp plate 382' of the clamp 380'. Filtration system

[0137] The collapsible filter bags, filter bag support assemblies, and filter bag assemblies described herein can all be used in any suitable filtration system (sometimes called a collector) to remove particulate matter from a gas stream (e.g., air) carrying particulate matter. An illustrative embodiment of the filtration system is shown below. Figure 16The central part is generally depicted as 410, and is generally box-shaped, and includes a top wall panel 416 and two pairs of opposite side wall panels 417 (one of which is in...). Figure 16 (See below). The filtration system 410 includes a contaminated air conduit 411 for receiving stale or polluted gas (i.e., air containing particulate matter) into the filtration system 410. A clean gas (e.g., air) conduit 413 may be provided (see example). Figure 18 This is used to remove clean or filtered air from the filtration system 410. The filtration system 410 includes covers 470 that close the inlet port in the inlet panel 419 of the filtration system 410.

[0138] The filtration system may also include a funnel 418 to collect particulate matter separated from the stale airflow, as described herein. The funnel 418 may include inclined walls to facilitate the collection of particulate matter, and in some embodiments may include a drive screw conveyor or other mechanism for removing the collected particulate matter.

[0139] Figure 16 The filtration system in Figure 17 Side and front views in Figure 18 It is depicted in the top plan view. For example, in... Figure 17 and Figure 18 As seen in the image, the filtration system 410 includes connectors 486, which connect to a pulse generator as part of a pulse jet cleaning system. Figures 16 to 18 (Not depicted in the text) fluid communication, wherein a pulse generator is configured to direct air pulses into the filter bag, as described herein.

[0140] refer to Figure 19A and Figure 19G The depicted filtration system 410 includes filter bag assemblies comprising filter bags 440 and flange assemblies 430 in a dirty air chamber 424, which is separated from a clean air chamber 422 by a tube sheet 420. Figure 19A The filtration system 410 is along Figure 18 The cross-sectional view is taken by lines 19A-19A and shows the interior of the filtration system 410 (where the filter bag 440 is intact, so that the support structure inside the filter bag 440 is not visible in the view). Figure 19G The filtration system 410 is along Figure 18The cross-sectional view taken by lines 19G-19G (wherein this cross-sectional view depicts the internal volume of filter bag 440, thus depicting a portion of the support structure within filter bag 440) is shown. The filter bag assembly is mounted on filter guide 460 located in stale air chamber 424. In the illustrated embodiment depicted, filter guide 460 extends across stale air chamber 424 from tube sheet 420 to inlet panel 419 of the filtration system.

[0141] The filter bags used in the filtration systems described herein preferably include an adapter strap and a sealing sleeve, and are configured to be folded such that an adapter pouch is formed near the bag opening, wherein the sealing sleeve is positioned on the outside of the folded portion of the filter bag, as described herein. Figures 19A to 19C , Figure 19G , Figure 20 , Figure 21A , Figure 23 , Figure 24 C and Figure 29 The filter bags depicted are simplified and do not include the folded sections described herein.

[0142] At the end of the tube sheet, each of the filter bag assemblies includes a flange assembly 430. The flange assembly 430 includes an inner surface 435 facing the dirty air chamber 424 and a tube sheet surface that abuts against the dirty air chamber side of the tube sheet 420. Each of the flange assemblies 430 surrounds an orifice in the tube sheet 420 through which clean air can enter from the interior of the filter bag assembly into the clean air chamber, and during a pulse cleaning event, an air pulse can enter the interior of the filter bag through the orifice.

[0143] Although the flange assembly 430 on each of the filter bag assemblies is described in more detail herein, Figure 19A The flange assembly 430 seen in the image includes a base 432 having a tube sheet surface of the flange assembly 430, and a clamp 434 configured to attach to the base 432 on the inner surface of the flange assembly 430. In this embodiment, a clean air outlet extends through the base 432 and the clamp 434, wherein the bag opening of the filter bag 440 is retained on the inner surface of the flange assembly 430 between the clamp 434 and the base 432.

[0144] like Figure 19AAn illustrative embodiment of the filtration system 410 depicted also includes a pulse generator 480 located in a clean air chamber 422. The pulse generator 480 is configured to deliver air pulses into the internal volume of the filter bag 440 to agitate particulate matter accumulated on the filter bag 440 during use, wherein the detached particulate matter preferably falls into a funnel 418 located below the filter bag 440. In one or more embodiments, the pulse generator 480 may be described as having an elongated shape extending along a pulse generator axis 481, as in, for example... Figure 19A As seen in the illustration. Pressurized air (or any other suitable gas) is delivered to the pulse generator via connectors 486, which, in the depicted embodiment, extend externally to the clean air chamber 422 for connection to a pulse cleaning system comprising one or more pressurized gas (e.g., air) sources, valves, and a control system. Illustrative embodiments of pulse cleaning systems can be found, for example, in U.S. Patent Nos. 4,218,227 (Frey), 5,562,746 (Raether), 6,090,173 (Johnson et al.), 6,902,592 (Green et al.), 7,641,708 (Kosmider et al.), and 8,075,648 (Raether).

[0145] The illustrative embodiment of the filtration system 410 also depicts pulse collectors 484, which, as will be described herein, can be attached to the flange assembly 430 of the filter bag assembly. In other embodiments, the pulse collectors 484 can be attached to the tube sheet 420. Regardless of their attachment configuration, the pulse collectors 484 are configured to guide pulsed air emitted from the pulse generator 480 into the internal volume of the filter bag 440 during a pulse cleaning process.

[0146] Figure 19B and Figure 19C It is along Figure 19A The cross-sectional view intercepted by lines 19B-19B in the figure, wherein Figure 19B It is intercepted when the filtration system 410 is not in use or is being used to filter the polluted air entering the polluted air chamber 424 through the inlet 411. Figure 19C The filter bag 440 is depicted relative to other structures of the filter bag assembly during a pulse cleaning event when pressurized air (or other gas) is delivered into the internal volume of the filter bag 440 as described herein.

[0147] Figure 19BA portion of the stale air chamber side of the tube sheet 420 is depicted, with the flange assembly 430 located on this stale air chamber side. As discussed herein, the depicted illustrative embodiment of the flange assembly 430 includes a base 432 and a clamp 434, wherein the bag opening of the filter bag 440 is retained between the clamp 434 and the base 432, allowing air to enter the internal volume of the filter bag 440 either by passing through the filter medium used to construct the filter bag 440 or by passing through the clean air outlet 436 of the flange assembly 430.

[0148] As in Figure 19B and Figure 19C As seen in the image, the filter bag assembly includes a retainer for holding the depicted filter bag 440 in a triangular shape (wherein...). Figure 19G (The retainer is seen in the cross-sectional view). In the illustrated embodiment depicted, the retainer includes a first retainer end attached to the flange assembly 430, wherein the retainer extends away from the flange assembly 430 along the retainer axis 451 along the retainer length and away from the flange assembly 430 to a second retainer end. In the illustrated embodiment depicted, the second retainer is positioned close to the inlet panel 419 of the filtration system 410.

[0149] In the illustrated embodiment of the filter bag assembly, the retainer includes a plurality of posts extending away from the inner surface of the flange assembly 430 toward a second retainer end approaching the inlet panel 419 of the filtration system 410. The plurality of posts define a triangular shape such that in each section taken transversely to the retainer axis 451 over most of the length of the retainer, the plurality of posts define a triangle having a top vertex and a pair of bottom vertices opposite the top vertex.

[0150] In the illustrated embodiment depicted, the retainer includes a top post 452 and a pair of bottom posts 454 and 456. The top post 452 defines the top vertex of a triangle defined by the plurality of posts, while the pair of bottom posts 454 and 456 defines the bottom vertex of the triangle defined by the plurality of posts. The illustrated embodiment of the retainer also includes a series of supports 453 extending from the top post 452 to each of the bottom posts 454 and 456 to provide additional support to the filter bag 440 at selected locations along the length of the retainer.

[0151] When the retainer is located within the filter bag 440, the filter medium of the filter bag 440 can be described as defining a pair of side surfaces 442 and a bottom surface 444. Each of the side surfaces 442 includes a top edge near the top vertex of each triangle defined by a plurality of posts (e.g., defined by a top post 452). Furthermore, each side surface 442 also includes a bottom edge away from the top edge of the side surface 442. (Reference) Figure 19B The bottom edge of the right surface 442 is defined by the right bottom vertex of each triangle defined by a plurality of pillars (e.g., defined by bottom pillar 454), while the bottom edge of the left surface 442 is defined by the left bottom vertex of each triangle defined by a plurality of pillars (e.g., defined by bottom pillar 456).

[0152] Because the filter bags used in the filter bag assembly of the filtration system described herein are made of generally flexible filter media, the top and bottom edges of the triangular-shaped filter bags may not be particularly distinct; that is, the edges may not form a single line. However, it will be understood that the edges may have a width around which the filter media extends as it moves from the side surface 442 to the bottom surface 444 around the bottom posts 454 and 456 and / or as it moves from one side surface 442 to the opposite side surface on the top post 452. Despite the lack of distinctiveness, the edges will be understood to generally conform to the shape of the posts used to define the different vertices of the triangle.

[0153] As in Figure 19B and Figure 19C The triangular shape defined by multiple posts in the illustrative embodiment of the retainer seen herein is merely one example of a triangular shape that can be used in combination with filter bag assemblies and filtration systems as described herein. However, in general, one or more embodiments of the filter bag assembly described herein can be described as having a bottom surface 444 with a filter medium having a width measured between the bottom edges of the side surfaces 442 (e.g., defined by bottom posts 454 and 456), which is less than the height of either side surface 442 as measured between its top and bottom edges (wherein the top edge is defined by top post 452 and the bottom edge by bottom posts 454 and 456). In one or more embodiments, the width of the bottom surface 444 may be 50% or less, 40% or less, 30% or less, 20% or less, 15% or less, 12% or less, 10% or less, 8% or less, or 5% or less of the height of either side surface 42 of the pair of side surfaces. At the lower end, the width of the bottom surface may be 4% or more, 5% or more, 6% or more, 8% or more, 10% or more, 12% or more, 15% or more or more, or more than the height of either of the pair of side surfaces. The width and height discussed herein are transverse to the cage axis 451 (i.e., as in, for example...). Figure 19B (As seen in the image) Measured.

[0154] exist Figure 19B and Figure 19COther features depicted in the cross-sectional view include a filter guide 460, which, in the illustrated embodiment, extends from the tube sheet 420 to the inlet panel 419 of the stale air chamber 424. In the illustrated embodiment, the filter guide 460 defines a guide axis 461 passing through the tube sheet 420 and the inlet panel 419. The depicted guide axis 461 is aligned with the cage axis 451, and although the two axes 451 and 461 may be parallel to each other, a perfectly parallel arrangement is not required.

[0155] The filter guide 460 includes an inlet end 463 at which a guide orifice 462 on the flange assembly 430 can be screwed, guided, or otherwise guided on the filter guide 460 such that the flange assembly 430 can be supported on the filter guide 460. In one or more embodiments, the inlet end 463 of the filter guide 460 may be positioned closer to the inlet panel 419 of the filtration system than the tube sheet 420 against which the flange assembly 430 abuts, as described herein.

[0156] Although in some of the illustrative embodiments described herein, the filter guide 460 extends from the tube sheet 420 to the inlet panel 419, in one or more alternative embodiments, the filter guide 460 may extend only partially across the stale air chamber, such that, for example, the filter guide 460 may terminate at a location where the inlet panel 419 is absent or even where the tube sheet 420 is absent. In one alternative embodiment, for example, the filter guide 460 may extend from the tube sheet 420 toward the inlet panel 419, but terminate at a location where the inlet panel 419 is absent.

[0157] Filter guide 460 is located within guide orifice 462 formed in flange assembly 430. The combination of filter guide 460 and guide orifice 462 in flange assembly 430 provides support to flange assembly 430 during insertion into and removal of the filter bag assembly from the stale air chamber 424 of filtration system 410. In particular, it may be preferred that filter guide 460 and guide orifice 462 allow flange assembly 430 to translate or slide through an inlet port in access panel 419 into tube sheet 420. Although the filter guide 460 and guide orifice 462 depicted in flange assembly 430 have similar shapes, any suitable combination of the shapes of both filter guide and guide orifice can be used.

[0158] exist Figures 19D to 19F Some alternative embodiments of the filter guide and guide orifice are depicted. Figure 19DIn this design, the filter guide 460' has a T-shaped profile, and the guide orifice 462' in the flange assembly 430' has a complementary shape configured to receive the filter guide 460'. Figure 19E In this configuration, the filter guide 460” has an inverted T-shaped profile, and the guide orifice 462” in the flange assembly 430” has a complementary shape configured to receive the filter guide 460”. Figure 19F In this design, the filter guide 460”' has a circular profile, and the guide orifice 462”' in the flange assembly 430”' has a complementary shape configured to receive the filter guide 460”'. Many other alternative forms of the filter guide and guide orifice may also be provided.

[0159] In addition to providing vertical support to the flange assembly 430, in one or more embodiments, the combination of the filter guide 460 and the guide orifice 462 can also be used to limit or prevent rotation of the flange assembly about the guide axis 461, thereby enabling proper alignment of the flange assembly 430 on the tube sheet 420. To limit or prevent such rotation, the filter guide 460 and guide orifice 462 on the flange assembly 430 can have non-circular shapes; the trefoil and T-shaped examples of the illustrative embodiments depicted provide only examples of some non-circular shapes that can limit or prevent rotation of the flange assembly 430 relative to the guide axis 461.

[0160] In one or more embodiments, the filter guide 460 may include a dust cover to prevent particulate matter from accumulating on the filter guide 460, which may detach during the removal of the filter bag assembly (e.g., as the flange assembly 430 moves from the tube sheet 420 toward the access panel 419).

[0161] exist Figure 19B and Figure 19COther features depicted in the cross-sectional view include a clean air outlet 436 disposed in the flange assembly 430, which allows clean air to exit the internal volume of the filter bag 440 and also allows pulses of air or other gases to enter the internal volume during a pulse cleaning process. In one or more embodiments, the clean air outlet may be described as having an elongated shape extending from a top (closest to the top post 452) and a bottom (closest to the bottom posts 454 and 456). The top and bottom ends of the clean air outlet 436 may be further described as defining an outlet axis 431 extending between the top and bottom ends of the clean air outlet 436. In one or more embodiments, the projection of the outlet axis 431 along the cage axis 451 passes between a pair of bottom vertices of a triangle defined by a plurality of posts (where those bottom vertices are defined by bottom posts 454 and 456). Furthermore, the projection of the outlet axis 431 passes through the top vertex of the triangle defined by a plurality of posts (e.g., defined by the top post 452).

[0162] Despite Figure 19B and Figure 19C Not depicted, but understood, the tube sheet 420 includes tube sheet orifices formed therethrough, which are at least as large as the clean air outlet 436 disposed in the flange assembly 430, such that the tube sheet orifices do not restrict the airflow entering or leaving the internal volume of the filter bag 440 through the clean air outlet 436. Alternatively, the tube sheet orifices may also be described as having a size smaller than the flange assembly 430, such that the flange assembly 430 can close or seal the tube sheet orifices, ensuring that air passing between the clean air chamber 422 and the dirty air chamber 424 must pass through the clean air outlet 436 when the filtration system 410 is operating.

[0163] Figure 19B and Figure 19C The cross-sectional view also depicts the alignment between the pulse generator 480 and the clean air outlet 436 of the flange assembly 430 in the illustrated embodiment of the filtration system 410. Specifically, the pulse generator 480 can be aligned with the clean air outlet 436. Even more specifically, when along as in... Figure 19B and Figure 19C When observing the cage axis 451 as seen in the image, the pulse generator axis 481 can be aligned with the outlet axis 431.

[0164] Figure 19B and Figure 19C The view further depicts port 482 of pulse generator 480. Specifically, port 482 faces clean air outlet 436 and orifices in tube sheet 420. Air delivered through port 482 of pulse generator 480 passes through those ports and enters clean air outlet 436 formed in flange assembly 430.

[0165] When the filter bag used in a filtration system as described herein has a generally triangular shape, various features can be incorporated into the ports 482 of the pulse generator 480 to facilitate the pulse cleaning process. For example, in one or more embodiments, the size of the ports 482 located closer to the bottom end of the clean air outlet 436 (i.e., closer to the bottom 444 of the filter bag 440) can be larger than that of the ports 482 positioned closer to the top end of the clean air outlet 436 (i.e., closer to the top edge of the side 442 of the filter bag 440). Alternatively or additionally, the spacing between the ports 482 can vary along the pulse generator axis 481. For example, the spacing between the ports 482 positioned closer to the bottom end of the clean air outlet 436 can be smaller than the spacing between the ports 482 positioned closer to the top end of the clean air outlet 436. This variation in the size and / or spacing of the ports 482 can facilitate the pulse cleaning process by providing more air and / or higher pressure near the bottom surface 444 within the filter bag 440.

[0166] Figure 19B and Figure 19C The comparison demonstrates the beneficial effects of the triangular-shaped filter bags described in this paper regarding specific loads and pulse cleaning. Specifically, as in... Figure 19B As seen in the image, the triangular-shaped filter bag 440 includes a bottom surface 444 facing downwards from the contaminated air inlet 411 into the contaminated air chamber 424 (see example...). Figure 19A Therefore, particulate matter introduced into the stale air chamber 424 above the triangular filter bag 440 will not directly impact the bottom surface 444 of the filter bag 440 or will only collect on the bottom surface under gravity. This improves the particulate carrying capacity of the filter bag 440, because only particulate matter entrained in the stale air reaching the bottom surface 444 can be captured on the bottom surface 444.

[0167] The improved pulse cleaning performance is also provided by the triangular-shaped filter bag 440, because during pulse cleaning, particulate matter not collected on the bottom surface 444 of the filter bag 440 is guided downwards away from the bottom surface 444. (Reference) Figure 19C During pulse cleaning, the bottom surface 444 of the filter bag 440 is forced outward / downward. Due to the nature of pulse cleaning, the outward / downward movement of the bottom surface 444 is a result of the rapid acceleration of the force applied to any detached particulate matter released from the bottom surface 444, wherein the vector of the pulse cleaning force is largely aligned with gravity to enhance the movement of any detached particulate matter into the collection area (e.g., the funnel 418 of the filtration system 410).

[0168] In addition to the beneficial effects of the bottom surface 444 of the triangular-shaped filter bag 440 in the filtration system described herein, the side surface 442 of the filter bag 440 also accelerates rapidly outward during pulse cleaning, as in Figure 19B and Figure 19C This can be seen in the changing position of the sides 442 of the filter bag 440. As discussed herein, this movement of the sides 442 of the triangular-shaped filter bag 440 provides many of the same advantages in pulse cleaning performance associated with conventional envelope-shaped filter bags with vertical sides.

[0169] Figure 20 This is a simplified schematic diagram of components of an illustrative embodiment of a filtration system, depicting an illustrative embodiment of a seal formed using a filter bag assembly in a filtration system as described herein. In the depicted illustrative embodiment, the filter bag assembly includes a flange assembly 430' and a retainer 450' attached to the flange assembly 430'.

[0170] A filter bag 440' is attached to a filter bag assembly, wherein the bag opening 441' is sealed against the flange assembly 430' and the retainer 450' is located within the internal volume defined by the filter bag 440'. For reference, a clean air outlet 436' is located along the outlet axis 431' in a manner similar to, for example, Figures 19A to 19C The exit axis 431 is extended in the manner depicted in the text.

[0171] The retainer 450' defines a retainer axis 451' extending through the clean air outlet 436' defined in the flange assembly 430'. The retainer 450' can also be described as including a first retainer end attached to the flange assembly 430' and a second retainer end along the retainer axis 451' away from the flange assembly 430'. The second retainer end of the retainer 450' can also be described as a second end 443' adjacent to the filter bag 440'.

[0172] Tube sheet 420' includes an orifice 426' formed through tube sheet 420'. Clean air chamber 422' and dirty air chamber 424' are also present. Figure 20 The diagram shows that two chambers are separated by a tube sheet 420'. A flange assembly 430' is positioned above an orifice 426' in the tube sheet 420', such that air entering from and exiting the internal volume of the filter bag 440' from the clean air chamber 422' passes through the orifice 426' and the clean air outlet 436' in the flange assembly 430'.

[0173] Figure 20An inlet panel 419' is also depicted positioned opposite to tube sheet 420' across stale air chamber 424'. An inlet port 474' is provided in the inlet panel 419' to allow removal and replacement of the filter bag assembly (including flange assembly 430', filter bag 440', and retainer 450' attached to flange assembly 430' and located within the internal volume of filter bag 440'). The inlet port 474' is closed by a cover 470' to seal stale air chamber 424' during operation of the filtration system.

[0174] Figure 20 The document also depicts a seal 438' located between the tube sheet face of the flange assembly 430' and the tube sheet 420'. The seal 438' is positioned around an orifice 426' in the tube sheet 420' and around a clean air outlet 436' in the flange assembly 430'. The seal 438' ensures that air entering the internal volume of the filter bag 440' must pass through the filter medium forming the filter bag 440' (e.g., during filtration) or the clean air outlet 436' and the orifice 426' in the tube sheet 420'. In other words, during operation of the filtration system as described herein, the seal 438' between the flange assembly 430' and the tube sheet 420' prevents air (and preferably any particulate matter) from passing between the tube sheet face of the flange assembly 430' and the tube sheet 420'.

[0175] In one or more embodiments, the seal 438' can be formed by compression between the flange assembly 430' and the tube sheet 420'. In one or more embodiments, a sealing actuator can be provided to apply a sealing force on the retainer 450' of the filter bag assembly. In such embodiments, the sealing force is preferably guided along the retainer axis 451 toward the tube sheet 420'. In one or more embodiments, the sealing force can be described as being guided through the second end 443' of the filter bag 440' and further transmitted through the filter bag 440', the retainer 450', and the flange assembly 430' to the seal 438'. In particular, in the illustrated embodiment depicted, the cover 470', which acts as a sealing actuator, acts on the second (closed) end 443' of the filter bag 440', which in turn acts on the second retainer end of the retainer 450', wherein the retainer 450' transmits the force to the flange assembly 430' by means of its attachment to the flange assembly 430'.

[0176] Seal 438' can be constructed from any suitable material and / or structure. While many seals can be formed by compressing one or more elastic and / or elastomeric materials (e.g., in O-rings, gaskets, etc.), other seal constructions can also be used to form the desired seal between the flange assembly and the tube sheet in a filtration system as described herein when the flange assembly is subjected to compressive forces (e.g., knife-edge seals, radial seals, axial seals, etc.).

[0177] Figure 21A This is a perspective view of a portion of tube sheet 420, wherein a filter bag assembly including filter bag 440 of the illustrative embodiment is supported on filter guide 460 of the illustrative embodiment. As discussed herein, the filter bag assembly including flange assembly 430 and filter bag 440 is supported on filter guide 460, wherein flange assembly 430 forms a seal with tube sheet 420.

[0178] In one or more embodiments of the filter bags and filtration systems described herein, a bag support may be positioned near the second end of the filter bag, i.e., the closed end of the filter bag away from the flange assembly, wherein the bag support is configured to prevent or limit sagging of the filter bag assembly at the second end of the filter bag due to, for example, the weight of a retainer located within the filter bag. In one or more embodiments of the filter bags, filter bag assemblies, and / or filtration systems described herein, the bag support may be disposed on the filter bag itself, as part of the filtration system, and / or include components configured as part of both the filter bag and the filtration system.

[0179] Figure 21A The filter bag assembly depicted includes an illustrative embodiment of a bag support in the form of a bag support connector 446 attached to the filter bag 440 near its second (closed) end 443 and a chamber connector 464 positioned in the stale air chamber near the housing's inlet panel 419. In the depicted embodiment, the chamber connector 464 is located on the filter guide 460, but this positioning is not required. The bag support connector 446 and the chamber connector 464 are configured to interlock with each other to support the second end of the filter bag 440 in the stale air chamber (wherein the first end of the filter bag 440 is cooperatively supported by a flange assembly 430 and the filter guide 460 as described herein).

[0180] In such Figure 21AIn the embodiment of the bag support depicted, the bag support connector 446 is in the form of a ring, while the chamber connector 464 is in the form of a hook, wherein the ring 446 is connected to the hook 464 to support the second end 443 of the filter bag 440. Many variations are of course possible. For example, the bag support connector 446 on the filter bag 440 may be in the form of a hook, while the chamber connector 464 may be in the form of a ring or orifice configured to receive the hook.

[0181] Figure 21B An alternative embodiment of a bag support that can be used to prevent or limit sagging of a filter bag assembly at the second end of the filter bag is depicted. In the depicted embodiment, the bag support includes a component similar to... Figure 21A The chamber connector 464 depicted on the filter guide 460 is, in the depicted embodiment, attached to the access panel 419 (where the cover 470 closes the access opening in the access panel 419, as described herein). Figure 21B Embodiments of the bag support depicted include a sling 447 that can be wound, for example, around a bag 440", wherein the sling 447" forms a loop configured to connect to a hook 464 on a filter guide 460. In one or more embodiments, the sling 447" can be attached to the filter bag 440" using one or more of the following: stitching, adhesive, etc., such that the sling 447" is replaced by the filter bag 440. Alternatively, the sling 447" can be detached from the filter bag 440" (e.g., not attached), such that the sling 447" can be reused with two or more different filter bags 440".

[0182] Figure 21C Another alternative embodiment of a bag support that can be used to prevent or limit sagging of the filter bag assembly at the second (closed) end of the filter bag is depicted. In the depicted embodiment, the bag support 446”' is in the form of a surface disposed near the bottom of the filter bag 440”' at the second end of the filter bag 440”'. The bag support 446”' can be attached to the access panel 419”' and can be accessed through an opening closed by the cover 470”' in the access panel 419”'. In one or more embodiments, the bag support 446”' can be moved downward (away from the bag axis 451) to facilitate replacement of the filter bag 440”'. The movement of the bag support 446”' can include one or both of translational and rotational movements of the bag support 446”'.

[0183] Figure 22AThis is a perspective view of an illustrative embodiment of an access panel 419, including an illustrative embodiment of a cover 570 for closing a filter inlet port 574 formed in the access panel 19, through which a filter bag assembly including a filter bag 540 can be removed from and inserted into a stale air chamber of the filtration system. The illustrative embodiment of the cover 570 includes a latch 572 and a fastener 573 to secure the cover 570 in a closed position (see cover 570 on the right side of the open cover 570). The cover 570 can be attached to the access panel 19 to rotate about a hinge axis 571, allowing the cover 570 to move from a closed position to an open position in which the filter bag assembly can be inserted into or removed from the stale air chamber through the inlet port 574.

[0184] Rotation of the cover 570 about the hinge axis 571 moves the cover 570 to its closed position, in which the cover 570 covers the filter inlet port 574. As described herein, when in the closed position, in addition to closing the filter inlet port 574, the cover 570 also acts as a sealing actuator, such that the cover 570 also acts on the second end 543 of the filter bag 540 to force the attached flange assembly against the tube sheet to form a seal. The force provided by the cover 571, which acts as a sealing actuator, when closed can be described as acting along the cage axis 551.

[0185] Figure 22B yes Figure 22A The perspective view of the entry panel 19 includes an alternative illustrative embodiment of a cover 570' for closing a filter inlet port 574 formed therein, through which a filter bag assembly including a filter bag 540 can be removed from and inserted into a stale air chamber of the filtration system including the entry panel 19. This illustrative embodiment of the cover 570' also includes a latch 572 and a fastener 573 to secure the cover 570' in a closed position (see cover 570' to the right of the open cover 570'). The cover 570' can also be attached to the entry panel 19 to rotate about a hinge axis 571, such that the cover 570' can be moved from a closed position to an open position in which the filter bag assembly can be inserted into or removed from the stale air chamber through the entry port 574.

[0186] Rotation of the cover 570' about the hinge axis 571 moves the cover 570' to its closed position, in which the cover 570' closes the filter inlet port 574. As described herein, when in the closed position, in addition to closing the filter inlet port 574, the cover 570' also acts as a sealing actuator, such that the cover 570' also acts on the second end 543 of the filter bag 540 to force the attached flange assembly against the tube sheet to form a seal. The force provided by the cover 570' acting as a sealing actuator during closure can be described as acting along the cage axis 551.

[0187] An additional feature depicted in cover 570' is a protrusion (cavity) 576 disposed in cover 570'. In one or more embodiments, protrusion 576 may have a shape complementary to the shape of the end 543 of filter bag 540. Such a protrusion can provide advantages such as: additional stability to the filter bag assembly near the access panel 19, a more uniform force distribution on the second end 543 of filter bag 540 and thus on the retainer located within the filter bag 540 in the filter bag assembly as described herein, verification of proper installation of the filter bag assembly (such as ensuring that, for example, the bottom surface of the triangular filter bag is properly oriented in the polluted air chamber), etc. In embodiments including such a protrusion, a bag support configured to support the second end of the filter bag (as described above in conjunction with, for example, Figures 21A to 21C The discussed points can help ensure that the second end 543 of the filter bag 540 is properly positioned when the cover 570' is closed.

[0188] As discussed herein, the filter bags in the filter bag assembly of the filtration system described herein are made of generally flexible filter media, and when viewed in cross-section, the filter bags may not form a particularly distinct triangle. However, in general, a triangular-shaped filter bag and its associated retainer can be described using the geometry of a triangle, and it should be understood that the edges, sides, and vertices of such a triangle will be approximated by the triangular retainer and the filter bag mounted thereon.

[0189] It should be understood, for reference Figures 23 to 26 Various triangular bag constructions can be used in one or more embodiments of filter bag assemblies and filtration systems using filter bag assemblies as described herein.

[0190] Figure 23The idealized triangular bag 540 depicted herein is similar in many respects to the triangular bag 440 discussed herein with respect to various embodiments of the filter bag assembly and filtration system described above. The triangular bag 540 includes a top vertex 545 and a pair of bottom vertices 546 and 547. A pair of side surfaces 542 extend between the top vertex 545 and each of the bottom vertices 546 and 547. A bottom surface 544 extends between the bottom vertices 546 and 547.

[0191] To further illustrate the difference between the idealized triangular shape defined by one or more embodiments of the filter bag as described herein and the actual shape adopted by the filter bag located on a holder providing the triangular shape, Figure 23 Including, for example, in Figures 4 to 7 The cage uprights and cage axis 551 seen in the image (the cage axis extends vertically outwards) Figure 23 (The paper in question). In particular, the top pillar, bottom pillar, and middle pillar 574 are in... Figure 23 The center is depicted inside the filter bag 540. It should be noted that two top supports 574 are provided. This configuration provides a small, flat surface along the top edge of the filter bag 540. Although slightly deviating from a perfect triangle, it can be seen that the side surfaces 542 and bottom surfaces 544 of the filter bag 540 present a generally triangular shape, as described herein.

[0192] The bottom surface 544 can be described as having a width wb extending between bottom vertices 546 and 547. The left side surface 542 can be described as having a height s1 measured between top vertices 545 and bottom vertices 547. The right side surface 542 can be described as having a height s2 measured between top vertices 545 and bottom vertices 546. As discussed herein, the width (wb) of the bottom surface is preferably less than the height (s1 or s2) of either of the side surfaces.

[0193] Although not required, the depicted triangular-shaped bag 540 forms a triangle, which can be described as an acute triangle and optionally an isosceles triangle (where s1 = s2). In the case of an isosceles triangle, Figure 23 The axis 501 depicted can be described as the height of the triangle formed by the filter bag 540.

[0194] The triangular bag 540 can be further described relative to the angle formed by the side surfaces 542. Specifically, the angle α (alpha) formed by the side surfaces 542 at the apex 545 can be selected such that the width (wb) of the bottom surface 544 has a selected relationship with the height of the side surfaces 542. In one or more embodiments, the angle α (alpha) can be 45° or less, 30° or less, 20° or less, 15° or less, 12° or less, 10° or less, or 5° or less. At the lower end, in one or more embodiments, the angle α (alpha) can be 2° or greater, 3° or greater, 4° or greater, or 5° or greater.

[0195] Figure 24 An alternative triangular-shaped filter bag is depicted that can be used in one or more embodiments of the filter bag assembly and / or filtration system described herein. The triangular-shaped bag 640 includes a top vertex 645 and a pair of bottom vertices 646 and 647. A pair of side surfaces 642 extend between each of the top vertex 645 and the bottom vertices 646 and 647. A bottom surface 644 extends between the bottom vertices 646 and 647. When mounted on a retainer in a filter bag assembly as described herein, the retainer axis will extend vertically outwards. Figure 24 The paper in question.

[0196] The bottom surface 644 can be described as having a width wb extending between bottom vertices 646 and 647. The left side surface 642 can be described as having a height s1 measured between top vertices 645 and bottom vertices 647. The right side surface 642 can be described as having a height s2 measured between top vertices 645 and bottom vertices 646. As discussed herein, the width (wb) of the bottom surface is preferably less than the height (s1 or s2) of either of the side surfaces.

[0197] The triangular bag 640 can optionally be described relative to the angle formed between the side surfaces 642 at the vertex 645. Specifically, the angle α (alpha) formed by the side surfaces 642 at the vertex 645 can be selected such that the width (wb) of the bottom surface 644 has a selected relationship with the height of the side surfaces 642. In one or more embodiments, the angle α (alpha) can be 45° or less, 30° or less, 20° or less, 15° or less, 12° or less, 10° or less, or 5° or less. At the lower end, in one or more embodiments, the angle α (alpha) can be 2° or greater, 3° or greater, 4° or greater, or 5° or greater.

[0198] The triangular bag 640 depicted can be described as an obtuse triangle. Figure 24The axis 601 depicted herein can be described as bisecting angle α (alpha), and therefore, axis 601 also bisectes the bottom surface 644. In one or more embodiments of the triangular filter bag as described herein, the axis passing through the top vertex and forming the bisecting angle at that vertex can preferably be oriented generally vertically within the stale air chamber of the filtration system. With respect to embodiments of the triangular filter bag 640, axis 601 can be oriented vertically, or alternatively, axis 601 can be tilted or angled relative to the vertical axis.

[0199] Although the bottom surface 644 of the triangular filter bag 640 may not be oriented transversely to the vertical axis, particulate matter detached from the bottom surface 644 during pulse cleaning will have a vertical force component that, when added to the force applied by gravity, will preferentially cause the detached particulate matter to move downwards, as described in conjunction with other illustrative embodiments of the filter bag described herein.

[0200] Figure 25 A pair of triangular-shaped filter bags 640 are depicted. Figure 25 The triangular filter bag 640 on the right side has a similar design to... Figure 24 The filter bag 640 depicted in the image has essentially the same shape. Figure 25 The triangular filter bag 640 on the left is... Figure 25 The image shows a mirror image of the right-hand filter bag 640. Both the left and right triangular filter bags 640 include vertically oriented surfaces 642 facing each other and aligned with the vertical axis V, while the outer surfaces 643 of the triangular filter bags 640 face away from each other. A potential advantage of this arrangement is that the triangular filter bags 640 can be spaced more closely (in the direction transverse to the vertical axis), thus increasing the surface area of ​​the filter media available within a given dirty air chamber volume, while retaining the particle carrying and pulse cleaning advantages that may be associated with triangular filter bags as described herein.

[0201] Figure 26 Another alternative triangular-shaped filter bag is depicted that can be used in one or more embodiments of the filter bag assembly and / or filtration system as described herein. The triangular-shaped bag 740 includes a top vertex 745 and a pair of bottom vertices 746 and 747. A pair of side surfaces 742 extend between the top vertex 745 and each of the bottom vertices 746 and 747. A bottom surface 744 extends between the bottom vertices 746 and 747. When mounted on a retainer in a filter bag assembly as described herein, the retainer axis will extend vertically outwards. Figure 26 The paper in question.

[0202] The bottom surface 744 can be described as having a width wb extending between bottom vertices 746 and 747. The left side surface 742 can be described as having a height s1 measured between top vertex 745 and bottom vertex 747. The right side surface 742 can be described as having a height s2 measured between top vertex 745 and bottom vertex 746. As discussed herein, the width (wb) of the bottom surface is preferably less than the height (s1 or s2) of either of the side surfaces.

[0203] The triangular bag 740 can be optionally described relative to the angle formed between the side surfaces 742 at the vertex 745. Specifically, the angle α (alpha) formed by the side surfaces 742 at the vertex 745 can be selected such that the width (wb) of the bottom surface 744 has a selected relationship with the height of the side surfaces 742. In one or more embodiments, the angle α (alpha) can be 45° or less, 30° or less, 20° or less, 15° or less, 12° or less, 10° or less, or 5° or less. At the lower end, in one or more embodiments, the angle α (alpha) can be 2° or greater, 3° or greater, 4° or greater, or 5° or greater.

[0204] The triangular bag 740 depicted can be described as a right-angled triangle. Figure 26 The axis 701 depicted herein can be described as bisecting the bottom surface 744. In one or more embodiments of the triangular filter bag as described herein, the axis passing through the top vertex and bisecting the bottom surface can be oriented substantially vertically within the stale air chamber of the filtration system. Regarding embodiments of the triangular filter bag 740, axis 701 can be oriented vertically, or alternatively, the right side surface 742 (forming a right angle with the bottom surface 744) can be oriented vertically such that the bottom surface 744 is oriented substantially horizontally relative to the vertical axis. As used herein, the phrase “substantially horizontal” (and its variations) means that one or more components (e.g., a filter bag and / or filter bag assembly with a retainer) are arranged such that one or more components form an angle of 45 degrees or less, 30 degrees or less, 20 degrees or less, or 15 degrees or less with the horizontal line (wherein the gravity vector defines the vertical axis). For example, if the filter bag and / or retainer is tilted relative to a perfect horizontal line, the retainer axis or filter bag axis can define such an angle with the horizontal line.

[0205] Even if the bottom surface 744 of the triangular filter bag 740 is not oriented transversely to the vertical axis (where, for example, axis 701 is oriented vertically), particulate matter detached from the bottom surface 744 during pulse cleaning will have a vertical force component that, when added to the force applied by gravity, will preferentially cause the detached particulate matter to move downwards, as described in conjunction with other illustrative embodiments of the filter bag described herein.

[0206] Figure 27 This is a cross-sectional view of another illustrative embodiment of the filter bag assembly described herein, which includes an envelope-shaped filter bag 840 supported on a flange assembly 830 by a retainer 850. While some illustrative embodiments of the filtration systems and filter bag assemblies described herein can advantageously utilize filter bags and retainers that produce triangular-shaped filter bags, many advantages and benefits associated with filter bag assemblies compressed within a polluted air chamber as described herein can also be used in conjunction with filter bags on filter bag assemblies having any preferred shape.

[0207] In particular, Figure 27 An embodiment of a more conventional envelope-shaped filter bag assembly is depicted, wherein the opposite main sides of the filter bag 840 are substantially parallel to each other in use (e.g., having an angle α (alpha) of essentially 0°) (see reference). Figures 23 to 26 The filter bag 840 is mounted on a retainer constructed of columns 850, which define the envelope shape of the filter bag 840 mounted thereon.

[0208] The column 850 is attached to a flange assembly 830, which includes a clean air outlet 836, as described in other embodiments of the flange assembly in conjunction with the filter bag assembly described herein. In the illustrated embodiment depicted, the clean air outlet 836 is elongated along an outlet axis 831, as described in conjunction with other illustrative embodiments herein.

[0209] The posts 850 of the retainer attached to the flange assembly 830 also extend away from the flange assembly 830 along the retainer axis 851 to a distal end, where these posts support a second end of the filter bag 840, as described in conjunction with other illustrative embodiments herein. Figure 27 The diagram also depicts a portion of a tube sheet 820 through which a flange assembly 830 is forced against to provide a seal, and an orifice 826 in the tube sheet 820 through which air enters or exits a clean air chamber located on the opposite side of the tube sheet 820.

[0210] Figures 28 to 30An illustrative embodiment of a triangular filter bag is depicted, which can be used in one or more embodiments of filter bag assemblies and filtration systems as described herein. The triangular filter bag 940 includes an opening 943, a closed end provided by a generally triangular end cap 990, and a body 980 extending along a bag axis 941 from the opening 943 to the closed end, the bag axis extending between the opening 943 and the closed end of the filter bag 940.

[0211] The body 980 of the triangular filter bag 940 is formed of a filter medium suitable for removing particulate matter from the air in its intended application. In one or more embodiments, the body 980 may consist essentially of the filter medium, without providing other components. Reference Figure 29 The body 980 may include seam edges 982 and 983, which are attached to each other to form longitudinal seams 982 / 983, as in, for example Figure 28 As seen in the image. When the seam edges 982 / 983 are attached to each other, the body can be described as having a tubular shape, which defines an internal volume between the opening 943 and the closed end defined by the triangular end cap 990. In this tubular shape, the filter medium of the body 980 also defines a closed end edge 984 located at the closed end of the filter bag 940 and an opening edge 985 located at the opening 943 of the filter bag 940.

[0212] In one or more embodiments, the engagement between the longitudinal seam 982 / 983 and the triangular end cap 990 may be positioned along one of the side edges 992 of the triangular end cap 990 between the bottom edge 994 and the highest point 995 of the triangular end cap. In one or more alternative embodiments, the engagement between the longitudinal seam and the triangular end cap of the filter bag as described herein may be positioned along either the bottom edge 994 or the highest point 995. Furthermore, although the body 980 includes only one longitudinal seam 982 / 983, one or more alternative embodiments of the triangular filter bag as described herein may include two or more seams.

[0213] Referring to an illustrative embodiment of the triangular end cap 990, the triangular end cap of one or more embodiments of the triangular filter bag described herein may include two side edges 992 extending between a bottom edge 994 and a highest point 995. Alternatively, the side edges 992 of the triangular end cap 990 may be described as meeting at the highest point 995 at a location remote from the bottom edge 994.

[0214] In order to provide a filter bag capable of removing particulate matter from the air, the filter medium of the body 980 is sealed to the side edge 992, bottom edge 994 and highest point 995 of the triangular end cap 990 at the closed end edge 984, thereby substantially preventing particulate matter from passing through those joints.

[0215] In one or more embodiments, the triangular end cap 990 may define a generally triangular shape of the filter bag 940 along its length, and the triangular shape of the filter bag 940 will be more clearly defined near the triangular end cap 990. Reference Figure 30 The shape of the triangular end cap 990 can be described with reference to the included angle formed between the side edges 992 of the triangular end cap 990. Specifically, in one or more embodiments, the bottom edge 994, the highest point 995, and the side edges 992 of the triangular end cap 990 can be described as defining an included angle α (alpha) of 20° or less, 15° or less, 12° or less, 10° or less, or 5° or less between the side edges 992 at the highest point 995. At the lower end, in one or more embodiments, the angle α (alpha) can be 2° or greater, 3° or greater, 4° or greater, or 5° or greater.

[0216] The triangular end caps that can be used in one or more embodiments of the triangular filter bag as described herein can be described alternatively with regard to the dimensions of the triangular end cap features. For example, in one or more embodiments, the triangular end cap 990, when projected onto a flat surface along the bag axis 941, may be defined in height (h) between the highest point 995 and the bottom edge 994. The projection of the triangular end cap 990 may also define a width (w) across the bottom edge 994 between the side edges 992. In one or more embodiments of the triangular filter bag as described herein, the height (h) is greater than the width (w). More specifically, in one or more embodiments, the height (h) defined between the bottom edge and the highest point of the triangular end cap may be 4 times or more, 6 times or more, 8 times or more, 10 times or more, 12 times or more, or 15 times or more of the width (w) defined between the sides of the triangular end along the bottom edge. In one or more embodiments, the height (h) defined between the bottom edge and the highest point of the triangular end cap may at the upper end be 20 times or less, 15 times or less, 12 times or less, 10 times or less, 8 times or less, or 6 times or less. In one embodiment, the height (h) defined between the bottom edge and the highest point of the triangular end cap may be 7 to 8 times the width (w) defined between the bottom edge and the sides of the triangular end cap. It should be noted that the height (h) is preferably measured along the end cap axis 991 extending between the bottom edge 994 and the highest point 995, and in one or more embodiments, this height may be described as bisecting both the bottom edge 994 and the highest point 995 and / or defining an axis of symmetry for the triangular end 990. In one or more embodiments of the filter bag including the triangular end cap as described herein, the triangular end cap may be constructed of a filter medium, for example, the same filter medium used for the body 980 of the filter bag. In one or more alternative embodiments, the triangular end cap may be constructed of an air-impermeable material (different from the filter media used for the body 980). In one or more embodiments, the triangular end cap may be a substantially rigid, self-supporting article, while in other embodiments, the triangular end cap may be constructed of a flexible material that is not self-supporting.

[0217] In one or more embodiments of the filter bag including triangular end caps as described herein, the closed end edge 984 of the body 980 may be sealed to the side edge 992 of the triangular end cap 990 using any suitable technique or combination of techniques sufficient to provide structural integrity to the joint and restrict / prevent particulate matter from passing through the joint. In one or more embodiments, the closed end edge may be sealed to the side edge using one or more of a stitched seam, a spliced ​​seam, an adhesive seam, a chemically welded seam, and a thermally welded seam.

[0218] In one or more embodiments of the filter bag including triangular end caps as described herein, the closed end edge 984 of the body 980 may be sealed to the bottom edge 994 of the triangular end cap 990 using any suitable technique or combination of techniques sufficient to provide structural integrity to the joint and restrict / prevent particulate matter from passing through the joint. In one or more embodiments, the closed end edge may be sealed to the side edge using one or more of a stitched seam, a spliced ​​seam, an adhesive seam, a chemical welded seam, and a thermal welded seam.

[0219] In one or more embodiments of the filter bag including triangular end caps as described herein, the closed end edge 984 of the body 980 may be sealed to the highest point 995 of the triangular end cap 990 using any suitable technique or combination of techniques sufficient to provide structural integrity to the joint and restrict / prevent particulate matter from passing through the joint. In one or more embodiments, the closed end edge may be sealed to the side edge using one or more of a stitched seam, a spliced ​​seam, an adhesive seam, a chemically welded seam, and a thermally welded seam.

[0220] refer to Figure 28 and Figure 29 The filter bag 940 also includes a sealing sleeve 649 attached to the filter medium of the body 980 near the opening edge 985 of the body 980. In one or more embodiments, the sleeve 949 may be used to seal the bag opening 943 in the flange assembly of the filter bag assembly as described herein. Explanatory aspects

[0221] The following are illustrative aspects of the filter bags, filter bag support assemblies, filter bag assemblies, air filtration systems, and methods described herein.

[0222] In independent aspect A1, a filter bag as described herein includes: a body including a bag opening and a closed end, the body extending from the bag opening to the closed end along a bag axis extending between the bag opening and the closed end, wherein the body includes a filter medium forming a tubular shape between the bag opening and the closed end; a sealing sleeve attached to the tubular filter medium forming the body, the sealing sleeve being attached to an inner surface of the filter medium near the bag opening, the sealing sleeve extending around the entire periphery of the bag opening; and an adapter tape positioned to form the tubular shape. On the filter medium, the adapter tape is located between the sealing sleeve and the closed end, and the adapter tape is positioned on the outer surface of the filter medium; wherein the filter medium forming the body between the sealing sleeve and the adapter tape is configured to be folded such that an adapter pouch is formed in the filter medium between the sealing sleeve and the adapter tape, wherein the adapter tape is located in the adapter pouch and the sealing sleeve is located outside the adapter pouch, and wherein, when moved away from the closed end along the pouch axis, after the adapter pouch is formed, the pouch opening is positioned between the adapter tape and the closed end of the body.

[0223] In aspect A2 according to aspect A1, before the filter medium is folded to form an adapter pouch, the inner periphery defined by the sealing sleeve is smaller than the inner periphery of the pouch opening defined by the filter medium.

[0224] In aspect A3 according to any one of aspects A1 to A2, the sealing sleeve includes discrete components attached to the inner surface of the filter medium.

[0225] In aspect A4 according to any one of aspects A1 to A3, the adapter tape includes discrete components positioned on the outer surface of the filter medium.

[0226] In aspect A5 of any one of aspects A1 to A4, the adapter band extends around the entire periphery of the outer surface of the tubular body.

[0227] In aspect A6 according to any one of aspects A1 to A5, the inner periphery defined by the adapter strip is equal to the outer periphery of the body defined by the filter medium on which the adapter strip is positioned.

[0228] In aspect A7 according to any one of aspects A1 to A6, the adapter tape is attached to the filter medium.

[0229] In aspect A8 according to any one of aspects A1 to A7, after the adapter pouch is formed, the sealing sleeve is located between the adapter sleeve and the closed end when the pouch is moved away from the closed end along the pouch axis.

[0230] In aspect A9 according to any one of aspects A1 to A8, the sealing sleeve includes an axial sealing length measured along the axis of the bag, and the adapter belt includes an adapter belt length measured along the axis of the bag, wherein the axial sealing length is equal to or greater than the adapter belt length.

[0231] In aspect A10 according to any one of aspects A1 to A9, the sealing sleeve includes an axial sealing length measured along the axis of the bag, and wherein the fitting belt includes a fitting belt length measured along the axis of the bag, wherein the axial sealing length is greater than the fitting belt length.

[0232] In aspect A11 according to any one of aspects A1 to A10, the adapter tape includes an adapter tape thickness measured in a direction transverse to the bag axis, and the sealing sleeve tape includes a sealing sleeve thickness measured in a direction transverse to the bag axis, wherein the sealing sleeve thickness is equal to or greater than the adapter tape thickness. In aspect A12 according to aspect A11, the sealing sleeve thickness is greater than the adapter tape thickness.

[0233] In aspect A13 according to any one of aspects A1 to A12, when moving away from the closed end of the bag along the bag axis, the sealing sleeve includes a proximal end and a distal end, wherein the proximal end of the sealing sleeve is located between the closed end of the body and the distal end of the sealing sleeve; wherein, when moving away from the closed end of the bag along the bag axis, the adapter band includes a proximal end and a distal end, wherein the proximal end of the adapter band is located between the closed end of the body and the distal end of the adapter band; and wherein, after the adapter pouch is formed, the distal end of the sealing sleeve is positioned closer to the closed end of the body than the proximal end of the adapter band.

[0234] In aspect A14 according to any one of aspects A1 to A13, when moving away from the closed end of the bag along the bag axis, the sealing sleeve includes a proximal end and a distal end, wherein the proximal end of the sealing sleeve is located between the closed end of the body and the distal end of the sealing sleeve; wherein, when moving away from the closed end of the bag along the bag axis, the adapter band includes a proximal end and a distal end, wherein the proximal end of the adapter band is located between the closed end of the body and the distal end of the adapter band, and wherein the adapter band includes an adapter band length measured along the bag axis; and wherein, before forming the adapter pouch, the proximal end of the sealing sleeve and the distal end of the sealing sleeve are separated by a pouch length that is twice the length of the adapter band. In aspect A15 of aspect A14, the adapter tape includes an adapter tape thickness measured in a direction transverse to the axis of the bag, and wherein the length of the bag is greater than the sum of the adapter tape thickness and the adapter tape length.

[0235] In aspect A16 according to any one of aspects A1 to A15, after the adapter pouch is formed, the adapter strap forms an adapter strap pouch in the adapter pouch.

[0236] In aspect A17 according to any one of aspects A1 to A16, the filter bag includes a bag support connector that is attached to the body near the closed end of the body, the bag support being located outside the internal volume of the body. In aspect A18 according to aspect A17, the bag support connector includes an orifice configured to receive a hook.

[0237] In independent aspect B1, a filter bag support assembly as described herein includes: a flange assembly including a base and a clamp, the flange assembly including a clean air outlet extending through the base and the clamp; a retainer including a first retainer end attached to the base of the flange assembly, the retainer extending in retainer length to a second retainer end remote from the base, the retainer defining a retainer axis extending between the first retainer end and the second retainer end; wherein the base includes a base facing the clamp. The base plate and the base orifice of the clean air outlet of the flange assembly contained in the base, wherein the base includes a channel surrounding the base orifice extending away from the clamp; and wherein the clamp includes a clamp plate including a clamp orifice of the clean air outlet of the flange assembly contained in the clamp, the clamp further including a guide vane positioned along the periphery of the clamp orifice, wherein the guide vane extends into the channel surrounding the base orifice when the clamp is attached to the base and the retainer is located within the clamp orifice.

[0238] In aspect B2 according to aspect B1, the guide vane is the first of a plurality of guide vanes positioned around the periphery of the clamp orifice, wherein adjacent guide vanes of the plurality of guide vanes are spaced apart from each other around the periphery of the clamp orifice.

[0239] In aspect B3 according to aspect B2, the plurality of guide vanes occupy 30% or more, 40% or more, 50% or more, 60% or more, 70% or more, 80% or more, or 90% or more of the periphery of the clamp orifice.

[0240] In aspect B4 according to any one of aspects B1 to B3, the plurality of guide vanes occupy the entire periphery smaller than the fixture orifice.

[0241] In aspect B5 according to any one of aspects B1 to B4, the clean air outlet is elongated such that the clean air outlet defines a maximum height along the long axis and a maximum width less than the maximum height along the short axis transverse to the long axis, wherein, optionally, the maximum height is 2 times or more, 3 times or more, or 4 times or more greater than the maximum width.

[0242] In aspect B6 according to any one of aspects B1 to B5, the filter bag support assembly includes a guide orifice in the flange assembly, the guide orifice being located outside the retainer and the clean air outlet, wherein the guide orifice is configured to receive a guide track when the clamp is attached to the base, and wherein the flange assembly is configured to advance along the guide track received in the guide orifice when the clamp is attached to the base.

[0243] In aspect B7 of aspect B6, wherein when the clean air outlet is elongated such that the clean air outlet defines a maximum height along the long axis and a maximum width less than the maximum height along the short axis transverse to the long axis, the guide orifice is positioned along the long axis.

[0244] In aspect B8 according to any one of aspects B6 to B7, the guide orifice is formed only in one of the base and the clamp of the flange assembly.

[0245] In aspect B9 according to any one of aspects B6 to B8, the guide orifice is formed in the clamp plate of the clamp of the flange assembly.

[0246] In aspect B10 according to any one of aspects B1 to B9, the assembly further includes a transition flange located between the base plate and the clamp plate, the transition flange including a flange orifice aligned with the base orifice and the clamp orifice, wherein the clean air outlet is located within the flange orifice, and wherein a portion of the transition flange is located between the channel surrounding the base orifice and the clamp plate; and optionally, wherein the flange orifice includes a guide vane recess on the periphery of the flange orifice, wherein the guide vane recess is located between the base plate and the channel when moving along the cage axis, and wherein the guide vane is positioned in the guide vane recess.

[0247] In independent aspect C1, a filter bag assembly as described herein includes: a flange assembly including a base and a clamp, the flange assembly including a clean air outlet extending through the base and the clamp; a retainer including a first retainer end attached to the base, the retainer extending in its length to a second retainer end remote from the base; and a filter bag including a bag opening attached to the flange assembly and a closed end opposite to the bag opening, the filter bag including a tubular body surrounding the retainer, such that... A retainer is housed within the filter bag, wherein the tubular body is formed of a filter medium, and the filter bag further includes: a sealing sleeve attached to the filter medium forming the tubular body, the sealing sleeve being attached to the filter medium near the bag opening, the sealing sleeve extending around the entire periphery of the bag opening; and an adapter strap attached to the filter medium forming the tubular shape, the adapter strap being located between the sealing sleeve and the closed end; wherein the body is formed between the sealing sleeve and the adapter strap. The filter media is folded to form an adapter pouch between the sealing sleeve and the adapter sleeve, wherein the adapter sleeve is located within the adapter pouch and the sealing sleeve is located outside the adapter pouch; wherein the base of the flange assembly includes a base plate and a base orifice defining the clean air outlet of the flange assembly within the base; wherein the clamp of the flange assembly includes a clamp plate including a clamp orifice for the clean air outlet of the flange assembly contained within the clamp, the clamp further including a circumference along the clamp orifice. A positioning guide vane is provided; wherein the adapter band is located between the guide vane and the base plate on the clamp; and wherein, when the clamp is attached to the base, the sealing sleeve is positioned between the base plate and the clamp plate, and the adapter band is located between the guide vane and the base plate, wherein the sealing sleeve forms a seal between the base and the clamp around the clean air outlet formed by the base orifice and the clamp orifice, such that air entering or leaving the filter bag must pass through the clean air outlet or the filter medium forming the filter bag.

[0248] In aspect C2 according to aspect C1, the sealing sleeve is compressed between the base plate and the clamp.

[0249] In aspect C3 according to any one of aspects C1 to C2, the base includes a channel surrounding the base orifice, the channel being surrounded by the base plate and extending away from the clamp, and wherein the adapter strap of the filter bag is located in the channel.

[0250] In aspect C4 according to aspect C3, when the sealing band forms a seal between the base and the clamp around the clean air outlet, the guide vane compresses the fitting band in the channel.

[0251] In aspect C5 according to any one of aspects C1 to C4, the adapter band forms an adapter band pouch in the adapter pouch, and wherein the leading edge of the guide vane is located in the adapter band pouch.

[0252] In aspect C6 according to any one of aspects C3 to C5, the sealing sleeve surrounds the channel between the base plate and the clamp plate.

[0253] In aspect C7 according to any one of aspects C1 to C6, the filter bag includes a bag support connector that is attached to the filter bag near the closed end, the bag support being located outside the internal volume of the filter bag.

[0254] In aspect C8 according to aspect C7, the bag support connector includes an opening configured to receive a hook.

[0255] In aspect C9 according to any one of aspects C1 to C8, the guide vane is the first of a plurality of guide vanes positioned around the periphery of the clamp orifice, wherein adjacent guide vanes of the plurality of guide vanes are spaced apart from each other around the periphery of the clamp orifice, and optionally, wherein the plurality of guide vanes occupy 30% or more, 40% or more, 50% or more, 60% or more, 70% or more, 80% or more, or 90% or more of the periphery of the clamp orifice.

[0256] In aspect C10 according to any one of aspects C1 to C9, the filter bag support assembly includes a guide orifice in the flange assembly, the guide orifice being located outside the retainer and the clean air outlet, wherein the guide orifice is configured to receive a guide track when the clamp is attached to the base, and wherein the flange assembly is configured to advance along the guide track received in the guide orifice when the clamp is attached to the base.

[0257] In aspect C11 of aspect C10, wherein when the clean air outlet is elongated such that the clean air outlet defines a maximum height along the long axis and a maximum width less than the maximum height along the short axis transverse to the long axis, the guide orifice is positioned along the long axis.

[0258] In aspect C12 according to any one of aspects C9 to C11, the guide orifice is formed only in one of the base and the clamp of the flange assembly.

[0259] In aspect C13 according to any one of aspects C9 to C12, the guide orifice is formed in the clamp plate of the clamp of the flange assembly.

[0260] In independent aspect D1, a filter bag assembly as described herein includes: a flange assembly including a base, a clamp, and a transition flange located between the base and the clamp, the flange assembly including a clean air outlet extending through the base, the clamp, and the transition flange; a retainer including a first retainer end attached to the base and extending in length to a second retainer end remote from the base; a filter bag including a bag opening attached to the flange assembly and a closed end opposite to the bag opening, the filter bag including a tubular body surrounding the retainer such that the retainer is housed within the filter bag, wherein the tubular body is formed of a filter medium, wherein the filter bag further includes a sealing sleeve attached to the filter medium forming the tubular body, the sealing sleeve being attached to the filter medium near the bag opening and extending around the entire periphery of the bag opening; wherein the base of the flange assembly The device includes a base plate and a base orifice defining a clean air outlet for a flange assembly within the base; wherein the clamp for the flange assembly includes a clamp plate including a clamp orifice for the clean air outlet of the flange assembly contained within the clamp, the clamp further including a positioning guide vane along the periphery of the clamp orifice; wherein a transition flange includes a flange orifice aligned with the base orifice and the clamp orifice, wherein the clean air outlet is located within the flange orifice, and wherein a portion of the transition flange is located between a sealing sleeve and the clamp plate; and wherein, when the clamp is attached to the base, the sealing sleeve is positioned between the base and the clamp, wherein the sealing sleeve forms a seal around the clean air outlet formed by the base orifice and the clamp orifice between the base, the transition flange, and the clamp, such that air entering or leaving the filter bag must pass through the clean air outlet or the filter medium forming the filter bag.

[0261] In aspect D2 according to aspect D1, the sealing sleeve is compressed between the base plate and the clamp.

[0262] In aspect D3 according to any one of aspects D1 to D2, the base includes a channel surrounding the base orifice, the channel being surrounded by the base plate and extending away from the clamp, and wherein the sealing sleeve of the filter bag is located in the channel.

[0263] In aspect D4 according to aspect D3, the flange orifice of the transition flange includes a guide vane recess on the periphery of the flange orifice, wherein, when moving along the cage axis, the guide vane recess is located between the sealing sleeve and the clamp plate, and wherein the guide vane is positioned in the guide vane recess.

[0264] In aspect D5 according to any one of aspects D1 to D4, the filter bag includes a bag support connector that is attached to the filter bag near the closed end, the bag support being located outside the internal volume of the filter bag.

[0265] In aspect D6 according to aspect D5, the bag support connector includes an opening configured to receive a hook.

[0266] In aspect D7 according to any one of aspects D1 to D6, the guide vane is the first of a plurality of guide vanes positioned around the periphery of the clamp orifice, wherein adjacent guide vanes of the plurality of guide vanes are spaced apart from each other around the periphery of the clamp orifice, and optionally, wherein the plurality of guide vanes occupy 30% or more, 40% or more, 50% or more, 60% or more, 70% or more, 80% or more, or 90% or more of the periphery of the clamp orifice.

[0267] In aspect D8 according to any one of aspects D1 to D7, the filter bag support assembly includes a guide orifice in the flange assembly, the guide orifice being located outside the retainer and the clean air outlet, wherein the guide orifice is configured to receive a guide track when the clamp is attached to the base, and wherein the flange assembly is configured to advance along the guide track received in the guide orifice when the clamp is attached to the base.

[0268] In aspect D9 according to aspect D8, when the clean air outlet is elongated such that the clean air outlet defines a maximum height along the long axis and a maximum width less than the maximum height along the short axis transverse to the long axis, the guide orifice is positioned along the long axis.

[0269] In aspect D10 according to any one of aspects D8 to D9, the guide orifice is formed only in one of the base and the clamp of the flange assembly.

[0270] In aspect D11 according to any one of aspects D8 to D9, the guide orifice is formed in the clamp plate of the clamp of the flange assembly.

[0271] In independent aspect E1, an air filtration system as described herein includes: a housing comprising: a tube sheet dividing the internal volume of the housing into a clean air chamber and a dirty air chamber; a dirty air inlet configured to deliver dirty air into the dirty air chamber; a clean air outlet configured to remove clean air from the clean air chamber; and a filter bag according to any one of aspects A1 to A18, wherein the filter bag is located in the dirty air chamber, and wherein the filter bag is folded such that the filter bag includes an adapter pouch.

[0272] In independent aspect F1, an air filtration system as described herein includes: a housing comprising: a tube sheet dividing the internal volume of the housing into a clean air chamber and a dirty air chamber; a dirty air inlet configured to deliver dirty air into the dirty air chamber; a clean air outlet configured to remove clean air from the clean air chamber; and a filter bag assembly according to any one of aspects C1 to C13, wherein the filter bag assembly is located in the dirty air chamber.

[0273] In independent aspect G1, an air filtration system as described herein includes: a housing comprising: a tube sheet dividing the internal volume of the housing into a clean air chamber and a dirty air chamber; a dirty air inlet configured to deliver dirty air into the dirty air chamber; a clean air outlet configured to remove clean air from the clean air chamber; and a filter bag assembly according to any one of aspects D1 to D11, wherein the filter bag assembly is located in the dirty air chamber.

[0274] In independent aspect H1, a method for removing particulate matter from polluted air using an air filtration system according to any one of aspects E1, F1 or G1 as described herein includes delivering polluted air to a polluted air chamber through a polluted air inlet and removing clean air from the clean air chamber through a clean air outlet.

[0275] In Independent Aspect I1, a method of mounting a filter bag on a filter bag support assembly to provide a filter bag assembly according to any one of Aspects C1 to C13 includes: folding the bag opening such that an adapter strap is located in an adapter pouch; positioning a clamp of a flange assembly of the filter bag support assembly on the filter bag, wherein the clamp includes guide vanes located in the adapter pouch and a tubular body of the filter bag extends through a clamp orifice in the clamp; advancing the filter bag and the clamp on a retainer attached to a base; and attaching the clamp to the base, wherein a sealing sleeve on the filter bag forms a seal around the clamp orifice and a base orifice in the base such that air entering or leaving the filter bag must pass through the base orifice or the filter medium forming the filter bag.

[0276] In independent aspect J1, a method of mounting a filter bag on a filter bag support assembly to provide a filter bag assembly according to any one of aspects D1 to D11 includes: positioning a clamp of a flange assembly of the filter bag support assembly on the filter bag, wherein a tubular body of the filter bag extends through a clamp orifice in the clamp; advancing the filter bag and the clamp on a retainer attached to a base; positioning a transition flange between the clamp and the base, wherein the transition flange includes a flange orifice, and wherein the clamp includes guide vanes located in the flange orifice; and attaching the clamp to the base, wherein a sealing sleeve on the filter bag forms a seal around a base orifice in the base such that air entering or leaving the filter bag must pass through the base orifice or the filter medium forming the filter bag.

[0277] The complete disclosures of the patents, patent documents, and publications specified herein are incorporated herein by reference in their entirety as if they were individually combined. In the event of any conflict or contradiction between the disclosures in this document and any such incorporated documents, this document shall prevail.

[0278] This document discusses illustrative embodiments of collapsible filter bags, filter bag support assemblies, filter bag assemblies, and filtration systems, as well as methods of using and assembling them, and some possible variations have been described. These and other variations and modifications in this invention will be apparent to those skilled in the art without departing from the scope of the invention, and it should be understood that the invention is not limited to the illustrative embodiments set forth herein. Therefore, the invention is limited only to the claims provided below and their equivalents. It should also be understood that the invention can also be suitably practiced in the absence of any elements not specifically disclosed as essential herein.

Claims

1. A filter bag, comprising: A body comprising a bag opening and a closed end, the body extending from the bag opening to the closed end along a bag axis extending between the bag opening and the closed end, wherein the body comprises a filter medium forming a tubular shape between the bag opening and the closed end; A sealing sleeve, the sealing sleeve being attached to the tubular filter medium forming the body, the sealing sleeve being attached to the inner surface of the filter medium near the bag opening, the sealing sleeve extending around the entire periphery of the bag opening; and An adapter tape is positioned on the filter medium forming the tubular shape, the adapter tape is located between the sealing sleeve and the closed end, and the adapter tape is positioned on the outer surface of the filter medium; The filter medium forming the body between the sealing sleeve and the adapter sleeve is configured to be folded such that an adapter pouch is formed in the filter medium between the sealing sleeve and the adapter sleeve, wherein the adapter sleeve is located in the adapter pouch and the sealing sleeve is located outside the adapter pouch, and wherein, when moving away from the closed end along the bag axis, after the adapter pouch is formed, the bag opening is positioned between the adapter sleeve and the closed end of the body; Wherein, when moving away from the closed end of the bag along the bag axis, the sealing sleeve includes a proximal end and a distal end, wherein the proximal end of the sealing sleeve is located between the closed end of the body and the distal end of the sealing sleeve; Wherein, when moving away from the closed end of the bag along the bag axis, the adapter strap includes a proximal end and a distal end, wherein the proximal end of the adapter strap is located between the closed end of the body and the distal end of the adapter strap, and wherein the adapter strap includes an adapter strap length measured along the bag axis. Specifically, before the fitting pouch is formed, the proximal end of the sealing sleeve and the distal end of the sealing sleeve are separated by a pouch length that is twice the length of the fitting sleeve.

2. The filter bag of claim 1, wherein, Before forming the fitting pouch by folding the filter medium, the inner perimeter defined by the sealing sleeve is smaller than the inner perimeter of the pouch opening defined by the filter medium.

3. The filter bag of any of claims 1-2, wherein, The sealing sleeve includes discrete components attached to the inner surface of the filter medium.

4. The filter bag of any one of claims 1-2, wherein, The adapter tape includes discrete components positioned on the outer surface of the filter medium.

5. The filter bag of claim 1, wherein, The adapter strap extends around the entire periphery of the outer surface of the body.

6. The filter bag of any one of claims 1 and 5, wherein, The inner perimeter defined by the adapter band is equal to the outer perimeter of the body defined by the filter medium on which the adapter band is positioned.

7. The filter bag of any one of claims 1 and 5, wherein, After the adapter pouch is formed, the sealing sleeve is positioned between the adapter sleeve and the closed end as the bag moves away from the closed end along the bag axis.

8. The filter bag of any one of claims 1 and 5, wherein, The sealing sleeve includes an axial sealing length measured along the bag axis, and the adapter strap includes an adapter strap length measured along the bag axis, wherein the axial sealing length is equal to or greater than the adapter strap length.

9. The filter bag of any one of claims 1 and 5, wherein, The adapter tape includes an adapter tape thickness measured in a direction transverse to the bag axis, and the sealing sleeve includes a sealing sleeve thickness measured in a direction transverse to the bag axis, wherein the sealing sleeve thickness is equal to or greater than the adapter tape thickness.

10. The filter bag of any one of claims 1 and 5, wherein, When the sealing sleeve moves away from the closed end of the bag along the bag axis, the sealing sleeve includes a proximal end and a distal end, wherein the proximal end of the sealing sleeve is located between the closed end of the body and the distal end of the sealing sleeve; Wherein, when moving away from the closed end of the bag along the bag axis, the adapter strap includes a proximal end and a distal end, wherein the proximal end of the adapter strap is located between the closed end of the body and the distal end of the adapter strap; Wherein, after the adapter pouch is formed, the distal end of the sealing sleeve is positioned closer to the closed end of the body than the proximal end of the adapter sleeve.

11. The filter bag of any one of claims 1 and 5, wherein, After the adapter pouch is formed, the adapter strap forms an adapter strap pouch within the adapter pouch.

12. The filter bag of any one of claims 1 and 5, wherein, The filter bag includes a bag support connector that is attached to the body near the closed end of the body, the bag support being located outside the internal volume of the body.

13. A filter bag assembly, comprising: A flange assembly, the flange assembly including a base and a clamp, the flange assembly including a clean air outlet extending through the base and the clamp; A retainer, the retainer including a first retainer end attached to the base, the retainer extending along its length to a second retainer end remote from the base; A filter bag, the filter bag including a bag opening attached to the flange assembly and a closed end opposite to the bag opening, the filter bag including a tubular body surrounding the retainer such that the retainer is received within the filter bag, wherein the tubular body is formed of a filter medium, and wherein the filter bag further includes: A sealing sleeve attached to the filter medium forming the tubular body, the sealing sleeve being attached to the filter medium near the bag opening, the sealing sleeve extending around the entire periphery of the bag opening; and an adapter tape attached to the filter medium forming the tubular body, the adapter tape being located between the sealing sleeve and the closed end. The filter medium of the body forming the filter bag between the sealing sleeve and the adapter sleeve is folded to form an adapter pouch between the sealing sleeve and the adapter sleeve, wherein the adapter sleeve is located in the adapter pouch and the sealing sleeve is located outside the adapter pouch. The base of the flange assembly includes a base plate and a base orifice, the base orifice defining the clean air outlet of the flange assembly in the base; The clamp of the flange assembly includes a clamp plate, the clamp plate including a clamp orifice of the clean air outlet of the flange assembly contained in the clamp, and the clamp further includes a guide vane positioned along the periphery of the clamp orifice. The adapter strap is located between the guide wing and the base plate on the clamp; Furthermore, when the clamp is attached to the base, the sealing sleeve is positioned between the base plate and the clamp plate, and the adapting sleeve is located between the guide vane and the base plate. The sealing sleeve forms a seal between the base and the clamp around the clean air outlet formed by the base orifice and the clamp orifice, such that air entering or leaving the filter bag must pass through the clean air outlet or the filter medium forming the filter bag.

14. The filter bag assembly according to claim 13, wherein, The sealing sleeve is compressed between the base plate and the clamp.

15. The filter bag assembly according to any one of claims 13 to 14, wherein, The base includes a channel surrounding the base opening, the channel being surrounded by the base plate and extending away from the clamp, wherein the adapter strap of the filter bag is located in the channel.

16. The filter bag assembly according to any one of claims 13 to 14, wherein, The adapter strap forms an adapter strap pouch in the adapter pouch, wherein the leading edge of the guide wing is located in the adapter strap pouch.

17. The filter bag assembly according to any one of claims 13 to 14, wherein, The filter bag includes a bag support connector that is attached to the filter bag near the closed end, the bag support being located outside the internal volume of the filter bag.

18. The filter bag assembly according to any one of claims 13 to 14, the filter bag assembly including a guide orifice in the flange assembly, the guide orifice being located outside the retainer and the clean air outlet, wherein, The guide orifice is configured to receive a guide track when the clamp is attached to the base, and wherein the flange assembly is configured to advance along the guide track received in the guide orifice when the clamp is attached to the base.

19. A method of mounting a filter bag on a filter bag support assembly to provide a filter bag assembly according to any one of claims 13 to 18, the method comprising: Fold the bag opening so that the fitting strap is located in the fitting pouch; The clamp of the flange assembly of the filter bag support assembly is positioned on the filter bag, wherein the clamp includes a guide wing located in the adapter bag and the tubular body of the filter bag extends through a clamp orifice in the clamp. Advance the filter bag and the clamp onto the retainer attached to the base; and The clamp is attached to the base, wherein a sealing sleeve on the filter bag forms a seal around the clamp orifice and the base orifice in the base, such that air entering or leaving the filter bag must pass through the base orifice or the filter medium forming the filter bag.

Images