Waveform pleated filter bag and skeleton structure and method

Abstract

The application discloses a corrugated pleated filter bag and a framework structure and method, which comprises a first main framework and a second main framework, the first main framework and the second main framework are connected in a detachable mode, a plurality of first main frameworks are spliced to form a first framework unit, a plurality of first framework units and the second main framework are spliced to form a second framework unit, a filter bag is detachably sleeved on the second framework unit, the end face of the second framework unit comprises but is not limited to a flange type, the upper side and the lower side of the first main framework are respectively provided with a first connecting end and a second connecting end, a plurality of first main frameworks are connected in a first position through the first connecting end and the second connecting end to form the first framework unit of the corrugated pleated filter bag, and a plurality of first framework units and the second main framework are spliced to form the second framework unit.

Description

Technical Field

[0001] This invention belongs to the field of dust collector bag technology, specifically relating to a corrugated filter bag and its skeleton structure and method. Background Technology

[0002] Currently, dust collectors typically use filter bags to filter dust. Internal filter bags are a key component in the operation of baghouse dust collectors and are usually suspended vertically inside the collector. When in use, the dust-laden airflow moves from the inside of the bag to the outside, and the dust is captured on the inner side of the filter bag.

[0003] Most existing internal filter bags are designed as annular filter bags, that is, traditional cylindrical cloth bags. The filtration area of ​​a single filter bag is approximately equal to the surface area of ​​the filter bag, that is, the perimeter of the cross section × the length of the filter bag. When occupying a certain space, the filtration area of ​​the filter bag is a constant, thus enabling a fixed filtration area within the existing space.

[0004] Traditional cylindrical filter bags have poor adaptability to load changes and are not suitable for capturing fine and dry dust. Furthermore, the constant filtration area of ​​the filter bags leads to poor filtration effect, high system pressure during operation, and reduced overall system performance and filter bag life.

[0005] Meanwhile, because the effective inner diameter of traditional cylindrical filter bags is too large and they are straight-tube structures, the airflow needs to completely overcome the negative pressure to shake off the filter cake and complete the dust removal work during the cleaning process. In addition, the vibration amplitude of the straight-tube structure is relatively small during the blowing process, making it difficult to remove dust.

[0006] In view of the above factors, a corrugated filter bag and skeleton structure and method are specially designed, which has good adaptability to load changes and is particularly suitable for capturing fine and dry dust. According to the system design and needs, the effective filtration area is increased, the system pressure difference is significantly reduced, thereby improving the overall system performance and filter bag life. Summary of the Invention

[0007] The purpose of this invention is to provide a corrugated filter bag and its skeleton structure and method to solve the problems mentioned in the background art.

[0008] The objective of this invention is achieved through the following technical solution: a wave-shaped pleated filter bag and a skeleton structure, comprising a first main skeleton and a second main skeleton, wherein the first main skeleton and the second main skeleton are detachably connected.

[0009] A number of the first main skeletons are spliced ​​together to form a first skeleton unit, and a number of the first skeleton units are spliced ​​together with a second main skeleton to form a second skeleton unit. A filter bag is detachably fitted onto the second skeleton unit.

[0010] Furthermore, the end face of the second skeleton unit includes, but is not limited to, a flange type;

[0011] The first main frame is provided with a first connecting end and a second connecting end on its upper and lower sides, and a plurality of the first main frames are connected end to end through the first connecting end and the second connecting end to form a first frame unit of the wave-shaped pleated filter bag. A plurality of the first frame units are spliced ​​with the second main frame to form a second frame unit.

[0012] Furthermore, the first main frame and the second main frame are constructed by welding together two layers of frame structure, wherein the inner layer of the frame structure adopts a stainless steel cylindrical structure and the outer layer of the frame structure adopts a grid cylindrical structure.

[0013] There is a gap between the two-layer skeleton structure, and the two-layer skeleton structure is connected by steel bars.

[0014] Furthermore, parallel guide components are fixed inside the first main frame and the second main frame, and the parallel guide components are spaced apart inside the first main frame and the second main frame.

[0015] Furthermore, the parallel guide assembly includes a positioning plate and a movable guide end disposed on the positioning plate. The positioning plate is connected to the inner wall of the first main frame and the second main frame through a connecting bracket. The positioning plate is provided with spaced backflow plates on its circumference, and the spaced areas of the backflow plates are hollowed-out positions.

[0016] Furthermore, the flow deflector is cone-shaped, with the small cone-shaped surface of the flow deflector facing the port direction of the second skeleton unit, and the flow deflector has several spaced through channels.

[0017] The positioning plate is vertically connected to the first main frame and the second main frame.

[0018] Furthermore, the second skeleton unit and the filter bag are detachably connected by bolts or riveting. The filter bag is provided with a plurality of connectors, one end of which is connected to the filter bag and the other end is connected to the flange stop of the second skeleton unit.

[0019] The upper end of the filter bag is fixed to the front end face of the connector.

[0020] Furthermore, the filter bag includes a pleated structure, the pleated structure including a first peak surface and a second peak surface, wherein the connection position of the first peak surface and the second peak surface is the fixed end position of the connector;

[0021] The first peak and the second peak are located on the second skeleton unit and are set at different angles.

[0022] Furthermore, the second peak surface is close to the inner layer of the two-layer skeleton structure, and the angle of the second peak surface is set at 30 degrees or 45 degrees along the clockwise or counterclockwise direction of the end face of the second skeleton unit.

[0023] A method for applying a corrugated filter bag and its skeleton structure includes the following steps:

[0024] It includes a second frame unit formed by a first frame unit, a filter bag is detachably fitted onto the second frame unit, and the second frame unit is installed in the flue gas purification ultra-low emission system.

[0025] A number of the first main skeletons are spliced ​​together to form a first skeleton unit, and a number of the first skeleton units are spliced ​​together with a second main skeleton to form a second skeleton unit. A filter bag is then detachably fitted onto the second skeleton unit.

[0026] The end face of the second frame unit includes, but is not limited to, a flange type;

[0027] The first main body frame is provided with a first connecting end and a second connecting end on its upper and lower sides respectively. Several first main body frames are connected end to end through the first connecting end and the second connecting end to form a first frame unit of the wave-shaped pleated filter bag. Several first frame units are spliced ​​with the second main body frame to form a second frame unit.

[0028] The aforementioned corrugated filter bag structure is applied to ultra-low emission systems for flue gas purification in the mining / calcining / aluminum industries.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] The movable guide end and the positioning plate of the present invention are connected in a rotatable manner. The rotatable connection includes the movable guide end being connected to the positioning plate through a bearing seat. The above structure can guide the air volume of the filtered dust inside the first main frame 1 and the second main frame in a circumferential manner in the use state, thereby reducing the total component of the local space. The above structure can extend the time of the filtered dust air volume in the filter bag per unit time and improve the filtration effect.

[0031] To facilitate the flow of air and dust during use, the deflector plate of this invention is cone-shaped, with its smaller conical surface facing the port of the second frame unit. The deflector plate has several spaced-apart through channels, and the positioning plate is vertically connected to the first and second main frames. Because of its cone shape, when airflow is applied, the airflow moves to both sides along the deflector plate, and some of the spaced-apart through channels flow downwards.

[0032] The bottom end of the second skeleton unit of the present invention is folded inward, so that the bottom of the second skeleton unit is not solid. This reduces the scraping and bumping of the filter bag during the process of putting the filter bag on the second skeleton unit, and makes the filter bag and the second skeleton unit fit better, so as to facilitate the putting on and taking off of the cylindrical bag.

[0033] This invention uses the combination of a first peak surface and a second peak surface to form different filtration areas, thereby reducing the inner diameter of the filter bag. In the cleaning state, the flushing airflow does not need to completely overcome the negative pressure to shake off the filter cake and complete the dust removal work. Furthermore, the structure of the first peak surface and the second peak surface is designed to have a larger vibration amplitude during the blowing process, making dust removal easier.

[0034] This invention exhibits excellent adaptability to load changes and is particularly suitable for capturing fine and dry dust. By increasing the effective filtration area according to system design and requirements, it significantly reduces system pressure differential, thereby improving overall system performance and filter bag lifespan. The filter bag design of this invention reduces fatigue damage and intermittent emissions caused by pulse jet cleaning. Due to the small effective inner diameter of the filter bag, which is irregularly shaped compared to a round bag, the pulse airflow does not need to completely overcome the negative pressure to shake off the filter cake and complete dust removal. The filter bag has a relatively loose section in the middle, resulting in a larger vibration amplitude during pulse jet cleaning, facilitating dust removal. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the first skeleton unit of the present invention;

[0036] Figure 2 This is a schematic diagram of the second skeleton unit of the present invention;

[0037] Figure 3 This is a schematic diagram of the first main body skeleton of the present invention;

[0038] Figure 4 This is a schematic diagram of the second main body skeleton of the present invention;

[0039] Figure 5 This is a cross-sectional view of the second main body skeleton of the present invention;

[0040] Figure 6 This is a schematic diagram of the active guide end of the present invention;

[0041] Figure 7 This is the present invention. Figure 6 Enlarged view of a portion;

[0042] Figure 8 This is a schematic diagram of the first and second peak surfaces of the filter bag of the present invention.

[0043] Figure 9 This is a three-dimensional schematic diagram of the connector of the present invention;

[0044] Figure 10 This is a schematic diagram of the connection between the connector and the stop of the present invention;

[0045] Figure 11 This is a schematic diagram showing the connection state between the connector and the filter bag of the present invention;

[0046] Figure 12 This is a schematic diagram of the cross-sectional state of the two-layer skeleton structure of the present invention;

[0047] Figure 13 This is a schematic diagram of the cross-sectional state of the two-layer skeleton structure of the present invention;

[0048] Figure 14 This is a schematic diagram of the bottom cross-section of the second skeleton unit of the present invention. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] like Figure 1-14 As shown, a wave-shaped pleated filter bag and skeleton structure includes a first main skeleton 1 and a second main skeleton 2, which are detachably connected.

[0053] A number of the first main skeleton 1 are spliced ​​together to form a first skeleton unit A, and a number of the first skeleton units A are spliced ​​together with the second main skeleton 2 to form a second skeleton unit B. Filter bags 1-2 are detachably fitted onto the second skeleton unit B.

[0054] The bottom end of the second skeleton unit of the present invention is folded inward. The outer layer of the bottom of the second skeleton unit adopts a cylindrical structure of grid and a grid steel bar structure. The grid steel bar is curved inward in an arc or in an L-shape. A through circular steel ring is provided in the space where the arc or L-shape is located for support.

[0055] The bottom surface of the inner stainless steel cylinder is flush with the top surface of the grating steel bars, which are either curved inward or L-shaped.

[0056] The bottom of the second frame unit is not solid, which reduces scratching and bumping of the filter bag during installation, allowing for a better fit between the filter bag and the second frame unit, and facilitating the installation and removal of the cylindrical bag.

[0057] To facilitate disassembly and installation during use, the end face of the second frame unit B includes, but is not limited to, a flange type.

[0058] The first main body frame 1 is provided with a first connecting end 1-3 and a second connecting end 1-4 on its upper and lower sides respectively. Several first main body frames 1 are connected head-to-head through the first connecting end 1-3 and the second connecting end 1-4 to form a first skeleton unit A of the wave-shaped pleated filter bag. Several first skeleton units A are spliced ​​with the second main body frame 2 to form a second skeleton unit B.

[0059] When the port of the second skeleton unit B, which is formed by splicing several first skeleton units A and second main skeleton 2, is used with external devices, the dust exhaust pipe of the external devices extends into the second skeleton unit B for sealing.

[0060] The first skeleton unit A and the second skeleton unit B are designed with a splicing structure and are configured with different lengths and diameters in use to facilitate disassembly and replacement.

[0061] To reduce the impact of wind resistance on the filter bag during use, the first main frame 1 and the second main frame 2 are welded together by two layers of frame structure 1-1. The inner layer of the frame structure 1-1 is a stainless steel cylindrical structure with through uniform channels, and the outer layer of the frame structure 1-1 is a grid cylindrical structure.

[0062] There is a gap between the two-layer skeleton structure 1-1, and the two-layer skeleton structure 1-1 are connected by steel bars.

[0063] To facilitate the reduction of filtration velocity by setting parallel guide components 3 during use, parallel guide components 3 are fixed inside the first main frame 1 and the second main frame 2. The parallel guide components 3 are spaced apart inside the first main frame 1 and the second main frame 2. The parallel guide components 3 include a positioning plate 4 and a movable guide end 5 set on the positioning plate 4. The positioning plate 4 is connected to the inner wall of the first main frame 1 and the second main frame 2 through a connecting bracket 6. The circumference of the positioning plate 4 is provided with spaced backflow plates 7, and the spaced areas of the backflow plates 7 are hollowed-out.

[0064] The movable guide end 5 and the positioning plate 4 are connected in a rotatable manner, wherein the rotatable connection includes the movable guide end 5 being connected to the positioning plate 4 through a bearing seat.

[0065] The above-mentioned structural configuration can guide the airflow of filtered dust inside the first main frame 1 and the second main frame 2 in a circumferential manner through the movable guide end 5 during use, thereby reducing the total component of the local space. The above-mentioned structural configuration can extend the time that the airflow of filtered dust is in the filter bag per unit time, thereby improving the filtration effect.

[0066] The movable guide end 5 is spherical or conical, and several spiral grooves are provided on the surface of the movable guide end 5. The depth of the spiral grooves is 5-10mm, and the spiral grooves are set as symmetrical spiral grooves in the same direction.

[0067] To facilitate the flow of dust during use, the deflector plate 7 is cone-shaped, with the small cone-shaped surface of the deflector plate 7 facing the port of the second skeleton unit B. The deflector plate 7 has several spaced through channels 8.

[0068] The positioning plate 4 is vertically connected to the first main frame 1 and the second main frame 2.

[0069] The aforementioned deflector plate 7 is cone-shaped. When airflow is applied, the airflow direction runs along the deflector plate 7 to both sides, and the partially spaced through channels 8 run downwards.

[0070] To facilitate the connection of the skeleton unit and the filter bag via connectors during use, the second skeleton unit B and the filter bag 1-2 are detachably connected by bolts or rivets. The filter bag 1-2 is provided with a plurality of connectors 11, one end of which is connected to the filter bag 1-2 and the other end is connected to the flange stop of the second skeleton unit B.

[0071] The upper end of the filter bag 1-2 is fixed to the front end face of the connector 11.

[0072] In order to facilitate the formation of different filtration areas by combining the first peak surface 9 and the second peak surface 10 during use, the filter bag 1-2 includes a pleated structure, which includes the first peak surface 9 and the second peak surface 10. The connection position of the first peak surface 9 and the second peak surface 10 is the fixed end 12 of the connector 11.

[0073] The first peak surface 9 and the second peak surface 10 are located on the second skeleton unit B and are set at different angles.

[0074] To facilitate different angles of the second peak surface 10 depending on the airflow and speed during use, the combination of the second peak surface 10 and the first peak surface 9 can maximize the filtration area during use. The second peak surface 10 is close to the inner layer of the two-layer skeleton structure 1-1, and the angle of the second peak surface 10 is set at 30 degrees or 45 degrees along the clockwise or counterclockwise direction of the end face of the second skeleton unit B.

[0075] In use, when the second peak surface 10 is close to the inner layer of the two-layer skeleton structure 1-1, and the first connecting end 1-3 and the second connecting end 1-4 are connected to form the first skeleton unit A of the wave-shaped pleated filter bag, the outer diameter of the first connecting end 1-3 and the second connecting end 1-4 is 10-15mm larger than the skeleton diameter.

[0076] The second peak surface 10 has an extension width greater than 10-15mm, and the second peak surface 10 is set with an inclined angle.

[0077] A method for applying a corrugated filter bag and its skeleton structure includes the following steps:

[0078] It includes a second skeleton unit B formed by a first skeleton unit A, on which filter bags 1-2 are detachably fitted, and the second skeleton unit B is installed in the flue gas purification ultra-low emission system.

[0079] A number of the first main skeleton 1 are spliced ​​together to form a first skeleton unit A, and a number of the first skeleton units A are spliced ​​together with the second main skeleton 2 to form a second skeleton unit B. Filter bags 1-2 are detachably fitted onto the second skeleton unit B.

[0080] The end face of the second skeleton unit B includes, but is not limited to, a flange type;

[0081] The first main body frame 1 is provided with a first connecting end 1-3 and a second connecting end 1-4 on its upper and lower sides respectively. Several first main body frames 1 are connected head-to-head through the first connecting end 1-3 and the second connecting end 1-4 to form a first skeleton unit A of the wave-shaped pleated filter bag. Several first skeleton units A are spliced ​​with the second main body frame 2 to form a second skeleton unit B.

[0082] The aforementioned corrugated filter bag structure is applied to ultra-low emission systems for flue gas purification in the mining / calcining / aluminum industries.

[0083] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0084] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A corrugated filter bag, characterized in that: It includes a skeleton structure, which includes a first main skeleton (1) and a second main skeleton (2), and the first main skeleton (1) and the second main skeleton (2) are connected in a detachable manner; A number of first main skeletons (1) are spliced ​​together to form a first skeleton unit (A), and a number of first skeleton units (A) are spliced ​​together with a second main skeleton (2) to form a second skeleton unit (B). Filter bags (1-2) are detachably fitted onto the second skeleton unit (B). The end face of the second skeleton unit (B) includes, but is not limited to, a flange type; The first main frame (1) is provided with a first connecting end (1-3) and a second connecting end (1-4) on its upper and lower sides respectively. Several first main frames (1) are connected end to end through the first connecting end (1-3) and the second connecting end (1-4) to form a first frame unit (A) of the wave-shaped pleated filter bag. Several first frame units (A) are spliced ​​with the second main frame (2) to form a second frame unit (B). The first main frame (1) and the second main frame (2) are constructed by welding together two layers of frame structure (1-1). The inner layer of the frame structure (1-1) is a stainless steel cylindrical structure, and the outer layer of the frame structure (1-1) is a grid cylindrical structure. There is a gap between the two-layer skeleton structure (1-1), and the two-layer skeleton structures (1-1) are connected by steel bars. Parallel guide components (3) are fixed inside the first main frame (1) and the second main frame (2), and the parallel guide components (3) are spaced apart inside the first main frame (1) and the second main frame (2); The parallel guide assembly (3) includes a positioning plate (4) and a movable guide end (5) disposed on the positioning plate (4). The positioning plate (4) is connected to the inner wall of the first main frame (1) and the second main frame (2) through a connecting bracket (6). The positioning plate (4) is provided with spaced backflow plates (7) on its circumference. The spaced area of ​​the backflow plates (7) is a hollow position. The backflow plate (7) is cone-shaped, and the small cone-shaped surface of the backflow plate (7) faces the port direction of the second skeleton unit (B). The backflow plate (7) has several through channels (8) spaced apart. The positioning plate (4) is vertically connected to the first main frame (1) and the second main frame (2); The second skeleton unit (B) and the filter bag (1-2) are detachably connected by bolts or rivets. The filter bag (1-2) is provided with a plurality of connectors (11). One end of the connector (11) is connected to the filter bag (1-2), and the other end is connected to the flange stop of the second skeleton unit (B). The upper end of the filter bag (1-2) is fixed to the front end face of the connector (11).

2. The corrugated filter bag according to claim 1, characterized in that: The filter bag (1-2) includes a pleated structure, which includes a first peak surface (9) and a second peak surface (10), wherein the connection position of the first peak surface (9) and the second peak surface (10) is the fixed end position (12) of the connector (11). The first peak surface (9) and the second peak surface (10) are located on the second skeleton unit (B) and are set at different angles.

3. The corrugated filter bag according to claim 2, characterized in that: The second peak surface (10) is close to the inner layer of the two-layer skeleton structure (1-1), and the angle of the second peak surface (10) is set at 30 degrees or 45 degrees along the clockwise or counterclockwise direction of the end face of the second skeleton unit (B).

4. A method for assembling a corrugated filter bag according to claim 3, characterized in that: Specifically, the steps include the following: It includes a second frame unit (B) formed by a first frame unit (A), on which filter bags (1-2) are detachably fitted, and the second frame unit (B) is installed in the flue gas purification ultra-low emission system; A number of first main skeletons (1) are spliced ​​together to form a first skeleton unit (A), and a number of first skeleton units (A) are spliced ​​together with a second main skeleton (2) to form a second skeleton unit (B). Filter bags (1-2) are detachably fitted onto the second skeleton unit (B). The end face of the second skeleton unit (B) includes, but is not limited to, a flange type; The first main frame (1) is provided with a first connecting end (1-3) and a second connecting end (1-4) on its upper and lower sides respectively. Several first main frames (1) are connected head-to-head through the first connecting end (1-3) and the second connecting end (1-4) to form a first frame unit (A) of a wave-shaped pleated filter bag. Several first frame units (A) are spliced ​​with the second main frame (2) to form a second frame unit (B).

Images