High-temperature-resistant composite filter bag structure

Abstract

The utility model provides a kind of high-temperature-resistant composite filter bag structure, it is related to filter bag technical field, including filter bag assembly, for filtering, including from inside to outside sequentially composite inner high-temperature-resistant layer, middle layer filter layer and outer layer scouring resistance layer;Mounting structure is used to install filter bag assembly, and can be connected with production equipment, including installation connecting structure and two clamping connecting structures, the installation connecting structure is used to install filter bag assembly, filter bag assembly adopts gradient composite structure from inside to outside, inner high-temperature-resistant layer is made of zirconia ceramic fiber and nickel-based alloy fiber blending, both retain the super high-temperature-resistant characteristic of zirconia ceramic fiber, and also enhance impact resistance by nickel-based alloy fiber, solve the performance limitation of traditional single material (such as glass fiber brittleness, aramid insufficient corrosion resistance).

Description

Technical Field

[0001] This utility model relates to the field of filter bag technology, and in particular to a high-temperature resistant composite filter bag structure. Background Technology

[0002] In the field of industrial flue gas purification, high-temperature resistant filter bags are the core components for achieving efficient filtration of high-temperature dust-laden gases. They are widely used in high-dust, highly corrosive high-temperature working conditions such as waste incineration, metallurgy, and chemical industries. Traditional high-temperature resistant filter bags usually use a single material (such as glass fiber, aramid, etc.) or a simple composite structure, and are fixed to the dust collector tube sheet or pipeline by means of bolt connection.

[0003] The installation of existing filter bags relies on traditional fasteners such as bolts and nuts, which need to be tightened one by one in a confined space. This operation is cumbersome and time-consuming. After long-term use, the bolts are prone to corrosion and disassembly is difficult, resulting in high filter bag replacement costs.

[0004] Therefore, we propose a high-temperature resistant composite filter bag structure. Utility Model Content

[0005] The purpose of this utility model is to solve the shortcomings of the existing technology. The installation of existing filter bags relies on traditional fasteners such as bolts and nuts, which need to be tightened one by one in a narrow space. The operation is cumbersome and time-consuming. After long-term use, the bolts are prone to corrosion and disassembly is difficult, resulting in high replacement costs for filter bags.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-temperature resistant composite filter bag structure includes a filter bag assembly for filtration, comprising an inner high-temperature resistant layer, a middle filtration layer, and an outer erosion-resistant layer layer sequentially laminated from the inside out; an installation structure for mounting the filter bag assembly and connecting it to production equipment, including an installation connection structure and two snap-fit ​​connection structures, wherein the installation connection structure is used to mount the filter bag assembly and connect it to the production equipment, and both snap-fit ​​connection structures are fixed to the outside of the installation connection structure; and a quick-locking structure for connecting with the snap-fit ​​connection structures to achieve quick fixing and disassembly of the filter bag assembly.

[0008] As a preferred embodiment of this utility model, the inner high-temperature resistant layer is a blended fabric of zirconium oxide ceramic fiber and nickel-based alloy fiber with a thickness of 0.3-0.5 mm.

[0009] As a preferred embodiment of this utility model, the middle filter layer is a composite wrinkled membrane of polyimide nanofibers and MOF crystals, with a wrinkle spacing of 0.5-1mm and a thickness of 0.2-0.3mm.

[0010] As a preferred embodiment of this utility model, the outer anti-erosion layer is a PTFE modified PPS fiber woven fabric with a micro-nano dual-scale hydrophobic and oleophobic coating on the surface. The coating is composed of fluorocarbon chain modified silica nanoparticles with a thickness of 50-100μm.

[0011] As a preferred embodiment of this utility model, the installation connection structure includes a pipe body for installing filter bag assemblies; a connecting ring fixedly disposed on the top of the pipe body, with a fixing groove inside for installing and snapping filter bag assemblies; and a connecting fixing block fixedly connected to the outer wall of the connecting ring for bolt connection with production equipment.

[0012] As a preferred embodiment of this utility model, the snap-fit ​​connection structure includes a plug block, which is fixedly disposed on the outer wall of the connecting ring; and a snap-fit ​​hole, which is opened on the outer wall of the plug block and penetrates through the outer wall of the plug block.

[0013] As a preferred embodiment of this utility model, the quick-locking structure includes a fixing ring with a fixing block fixedly disposed at the bottom. The fixing block is engaged in a fixing groove to secure the filter bag assembly. A connecting column is fixedly disposed at the bottom of the fixing ring and is inserted into the fixing block during installation. A partition plate is disposed at the center inside the connecting column. Mounting cavities are located on both sides of the partition plate. Fixing seats are respectively disposed on the two walls of the two mounting cavities. Several limiting slide rails are disposed on the side walls of the fixing seats. Several limiting sliders are slidably connected to the limiting slide rails. Two moving plates are respectively disposed between the several limiting sliders. Two locking pins are disposed on the outer walls of the two moving plates for engaging with locking holes. Two compression springs are disposed on the inner walls of the two moving plates for ejecting the locking pins.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the filter bag assembly adopts a gradient composite structure from the inside out. The inner high-temperature resistant layer is made of a blend of zirconia ceramic fiber and nickel-based alloy fiber, which retains the ultra-high temperature resistance of zirconia ceramic fiber and enhances the impact resistance through nickel-based alloy fiber, thus solving the performance limitations of traditional single materials (such as glass fiber, which is brittle, and aramid, which is not corrosion resistant enough). The middle filter layer adopts a composite pleated membrane of polyimide nanofiber and MOF crystal. The pleated structure increases the filtration area, and the porous structure of MOF crystal enhances the ability to capture fine particulate matter, effectively improving the filtration efficiency and overcoming the problems of limited filtration area and low capture efficiency of fine particulate matter such as PM2.5 in traditional flat membrane structures.

[0016] By combining the installation structure with the quick-locking structure, the filter bag assembly can be quickly installed and disassembled. During installation, the fixing block of the fixing ring is engaged in the fixing groove of the connecting ring, and the connecting post is inserted into the insertion block. The compression spring pushes the moving plate to make the locking post pop out and engage with the locking hole, completing the quick locking. During disassembly, the locking post can be released simply by pressing it, without relying on traditional fasteners such as bolts. This solves the problems of traditional filter bag installation, which requires tightening bolts one by one in a narrow space, which is cumbersome, and the difficulty of disassembly due to bolt corrosion after long-term use. At the same time, it avoids uneven tension caused by repeated calibration during installation, reducing the risk of local wear or air leakage of the filter bag. Attached Figure Description

[0017] Figure 1 This invention provides the main structural concept of a high-temperature resistant composite filter bag structure.

[0018] Figure 2 A schematic diagram showing the main body of a high-temperature resistant composite filter bag structure provided by this utility model;

[0019] Figure 3 A schematic cross-sectional view of the main body of a high-temperature resistant composite filter bag structure provided by this utility model;

[0020] Figure 4 A schematic diagram of a quick-locking structure for a high-temperature resistant composite filter bag provided by this utility model;

[0021] Figure 5 This is a schematic diagram of a filter bag assembly with a high-temperature resistant composite filter bag structure provided by this utility model.

[0022] Legend: 10. Filter bag assembly; 101. Inner high-temperature resistant layer; 102. Middle filter layer; 103. Outer erosion-resistant layer; 20. Installation structure; 201. Pipe body; 202. Connecting ring; 203. Fixing groove; 204. Connecting fixing block; 205. Insertion block; 206. Snap-fit ​​hole; 30. Quick-locking structure; 301. Fixing ring; 302. Fixing insertion block; 303. Connecting column; 304. Divider plate; 305. Installation cavity; 306. Fixing seat; 307. Limiting slide rail; 308. Limiting slider; 309. Moving plate; 310. Snap-fit ​​column; 311. Compression spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Example

[0028] like Figure 1-5 As shown, this utility model provides a technical solution: a high-temperature resistant composite filter bag structure, including a filter bag assembly 10 for filtration, comprising an inner high-temperature resistant layer 101, a middle filter layer 102 and an outer anti-erosion layer 103 sequentially composited from the inside to the outside;

[0029] The mounting structure 20 is used to mount the filter bag assembly 10 and can be connected to the production equipment. It includes a mounting connection structure and two snap-fit ​​connection structures. The mounting connection structure is used to mount the filter bag assembly 10 and connect the filter bag assembly 10 to the production equipment. The two snap-fit ​​connection structures are fixed on the outside of the mounting connection structure.

[0030] The quick-locking structure 30 is used to connect with the snap-fit ​​connection structure to enable quick fixing and disassembly of the filter bag assembly 10.

[0031] The filter bag assembly 10 works synergistically through a gradient composite structure of inner, middle, and outer layers. The inner layer directly contacts the high-temperature flue gas to achieve high-temperature protection, the middle layer is responsible for core filtration, and the outer layer resists the scouring of flue gas. The installation connection structure of the installation structure 20 provides an installation foundation for the filter bag assembly 10 and connects it to the production equipment. The snap-fit ​​connection structure works in conjunction with the quick-locking structure 30 to replace the traditional bolt connection with mechanical snap-fit, realizing the quick fixing and disassembly of the filter bag assembly 10, solving the problems of cumbersome and inefficient traditional installation and disassembly.

[0032] The inner high-temperature resistant layer 101 is a blended fabric of zirconia ceramic fiber and nickel-based alloy fiber with a thickness of 0.3-0.5mm.

[0033] Zirconia ceramic fiber has excellent high-temperature resistance and can withstand long-term baking by high-temperature flue gas, while nickel-based alloy fiber has good toughness and impact resistance. The inner high-temperature resistant layer 101 formed by the blending of the two can not only resist high temperature through zirconia ceramic fiber to avoid damage to the single material due to high temperature aging, but also make up for the brittleness of ceramic fiber through nickel-based alloy fiber, preventing the inner layer of the filter bag from breaking due to flue gas impact or slight collision during installation. At the same time, the thickness of 0.3-0.5mm ensures both high-temperature resistance and air permeability, ensuring that flue gas can pass smoothly into the middle filtration layer.

[0034] The middle filter layer 102 is a composite wrinkled membrane of polyimide nanofibers and MOF crystals, with a wrinkle spacing of 0.5-1mm and a thickness of 0.2-0.3mm.

[0035] Polyimide nanofibers have ultra-fine diameters and high specific surface areas, enabling them to efficiently intercept fine particulate matter. The porous structure of MOF crystals enhances the adsorption of harmful gases in flue gas. The pleated structure increases the filtration area within a limited space, improving filtration efficiency, while the 0.5-1mm pleat spacing guides the intercepted dust to fall along the pleat gaps, reducing accumulation. The 0.2-0.3mm thickness reduces flue gas flow resistance while ensuring filtration accuracy, solving the problems of limited filtration area and low fine particulate matter capture efficiency of traditional flat membrane structures.

[0036] The outer erosion-resistant layer 103 is a PTFE-modified PPS fiber woven fabric with a micro-nano dual-scale hydrophobic and oleophobic coating on the surface. The coating is composed of fluorocarbon chain modified silica nanoparticles with a thickness of 50-100μm.

[0037] PTFE-modified PPS fibers retain the corrosion resistance of PPS fibers, while the addition of PTFE improves the wear resistance of the fibers, which can resist the erosion and wear of hard particles in high-temperature flue gas. The micro-nano dual-scale hydrophobic and oleophobic coating on the surface, with fluorocarbon chain modified silica nanoparticles forming a rough structure, reduces the adhesion of dust and oil on the surface through "non-adhesion" properties, reduces the difficulty of dust removal, and solves the problems of insufficient wear resistance of the outer layer of traditional filter bags, easy dust adhesion leading to shortened life and short dust removal cycle.

[0038] The installation connection structure includes a pipe body 201 for installing the filter bag assembly 10;

[0039] The connecting ring 202 is fixedly installed on the top of the pipe body 201, and a fixing groove 203 is provided inside it. The fixing groove 203 is used to install the snap-fit ​​filter bag assembly 10.

[0040] The connecting fixing block 204 is fixedly connected to the outer wall of the connecting ring 202 and is used for bolt connection with the production equipment.

[0041] The duct body 201 provides installation space for the filter bag assembly 10, ensuring that the filter bag assembly 10 matches the flue gas flow path; the fixing groove 203 of the connecting ring 202 positions the filter bag assembly 10 by snap-fit, preventing the filter bag from shifting under the impact of flue gas; the connecting fixing block 204 is connected to the production equipment by bolts, realizing the stable connection between the entire filter bag structure and the production system, solving the problems of inaccurate positioning and poor connection stability with equipment during traditional filter bag installation.

[0042] The snap-fit ​​connection structure includes a plug-in block 205, which is fixedly mounted on the outer wall of the connecting ring 202;

[0043] The snap-fit ​​hole 206 is formed on the outer wall of the plug-in block 205 and extends through the outer wall of the plug-in block 205.

[0044] The plug-in block 205 provides a plug-in positioning base for the quick-locking structure 30, ensuring precise docking between the quick-locking structure 30 and the installation connection structure; the snap-fit ​​hole 206 is used to cooperate with the snap-fit ​​post 310 of the quick-locking structure 30, and realizes the fixation of the quick-locking structure 30 and the installation connection structure through mechanical snap-fit, providing structural support for the rapid installation of the filter bag assembly 10, and solving the problem of cumbersome positioning of traditional bolt connection.

[0045] The quick-locking structure 30 includes a fixing ring 301 and a fixing block 302 fixedly provided at the bottom. The fixing block 302 is snapped into the fixing groove 203, thereby snapping and fixing the filter bag assembly 10.

[0046] The connecting post 303 is fixedly installed at the bottom of the fixing ring 301 and is inserted into the plug block 205 during installation;

[0047] The partition plate 304 is located at the center inside the connecting column 303;

[0048] The mounting cavity 305 is provided on both sides of the partition plate 304;

[0049] The fixing bases 306 are respectively disposed on the two walls of the two mounting cavities 305;

[0050] Several limiting slide rails 307 are provided on the side wall of the fixed base 306;

[0051] Several limiting sliders 308 are slidably connected to the limiting slide rail 307;

[0052] Two movable plates 309 are respectively set between several limit sliders 308;

[0053] Two snap-fit ​​posts 310 are set on the outer wall of the two movable plates 309 for snap-fitting with snap-fit ​​holes 206;

[0054] Two compression springs 311 are provided on the inner walls of the two movable plates 309 for ejecting the snap-fit ​​pins 310.

[0055] During installation, the fixing block 302 of the fixing ring 301 is inserted into the fixing groove 203 of the connecting ring 202 to axially fix the filter bag assembly 10; the connecting post 303 is inserted into the insertion block 205 to achieve radial positioning; at this time, the compression spring 311 pushes the moving plate 309, which drives the limiting slider 308 to slide along the limiting slide rail 307, so that the snap-fit ​​post 310 pops out and inserts into the snap-fit ​​hole 206 to complete the quick locking; during disassembly, pressing the snap-fit ​​post 310 causes the compression spring 311 to retract, and the snap-fit ​​post 310 disengages from the snap-fit ​​hole 206, so that the quick locking structure 30 and the filter bag assembly 10 can be removed. This solves the problems of cumbersome installation and disassembly of traditional bolt connections and difficulty in disassembly after corrosion. At the same time, the limiting slide rail 307 and the limiting slider 308 ensure the stable movement of the snap-fit ​​post 310 and avoid snap-fit ​​failure.

[0056] Workflow

[0057] I. Installation and Fixing Stage

[0058] Positioning: Place the top edge of the filter bag assembly 10 on the connecting ring 202 of the installation connection structure, so that the inner high-temperature resistant layer 101 of the filter bag assembly 10 faces the flue gas inflow direction and the outer anti-erosion layer 103 faces outward, and the whole is adapted to the internal space of the pipe body 201.

[0059] Quick locking: Align the fixing ring 301 of the quick locking structure 30 with the connecting ring 202, and insert the fixing block 302 into the fixing groove 203 of the connecting ring 202 to achieve axial positioning of the filter bag assembly 10; at the same time, the connecting post 303 is inserted into the insertion block 205 of the snap-fit ​​connection structure. At this time, the compression spring 311 in the mounting cavity 305 naturally extends, pushing the moving plate 309 to drive the limiting slider 308 to slide along the limiting slide rail 307, so that the snap-fit ​​post 310 pops out and inserts into the snap-fit ​​hole 206 of the insertion block 205, completing the quick locking of the filter bag assembly 10 and the mounting structure 20.

[0060] Equipment docking: The entire structure is fixed to the corresponding interface of the production equipment, such as the dust collector pipe, by bolts through the connecting fixing block 204 on the outer wall of the connecting ring 202, to ensure a stable installation.

[0061] II. Filtration Operation Phase

[0062] High-temperature, dust-laden flue gas, such as flue gas from waste incineration or metallurgy, enters the main pipe 201 and flows sequentially through the three-layer structure of the filter bag assembly 10 to complete purification.

[0063] High-temperature protection: The inner high-temperature resistant layer is a blend of 101 zirconia ceramic fiber and nickel-based alloy fiber fabric that comes into direct contact with high-temperature flue gas. The temperature resistance of the zirconia ceramic fiber helps it withstand temperatures of 800-1200℃, while the nickel-based alloy fiber enhances the structural toughness and prevents damage to the inner layer caused by high-temperature impact. The flue gas then enters the middle layer after passing through the inner layer.

[0064] High-efficiency filtration: The middle filter layer, a composite pleated membrane of 102 polyimide nanofibers and MOFs crystals, plays a core filtration role: the pleated structure with a spacing of 0.5-1mm increases the filtration area; the polyimide nanofibers intercept fine particulate matter such as PM2.5; and the MOFs crystals adsorb SO2 and NO in the flue gas. x Harmful gases are trapped; the intercepted dust falls naturally along the gaps in the folds, reducing accumulation.

[0065] Erosion resistance and anti-adhesion: The outer erosion layer is made of 103PTFE modified PPS fiber woven fabric to resist the erosion and wear of hard particles in the flue gas. The surface micro-nano dual-scale hydrophobic and oleophobic coating and fluorocarbon chain modified silica nanoparticles reduce the adhesion of dust and oil stains, reduce the difficulty of cleaning, and the purified flue gas flows out through the outer layer.

[0066] III. Maintenance and Replacement Phase

[0067] Unlocking and disassembly: When the filter bag assembly 10 reaches the end of its service life or requires maintenance, press the locking posts 310 on both sides of the quick-locking structure 30. The compression spring 311 is compressed and contracted, which drives the moving plate 309 and the limit slider 308 to move back, so that the locking posts 310 disengage from the locking holes 206; lift the fixing ring 301 upward, the fixing block 302 disengages from the fixing groove 203, the connecting post 303 leaves the insertion block 205, and the quick-locking structure 30 separates from the installation structure 20.

[0068] Replacement of components: Remove the old filter bag assembly 10 and replace it with the new filter bag assembly 10. Repeat the steps of the "Installation and Fixing Stage" to reposition and lock it, and the filtration operation will be restored.

[0069] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature resistant composite filter bag structure, characterized in that, include: The filter bag assembly (10) is used for filtration and includes an inner high-temperature resistant layer (101), a middle filter layer (102) and an outer erosion-resistant layer (103) that are sequentially compounded from the inside to the outside. The mounting structure (20) is used to install the filter bag assembly (10) and can be connected to the production equipment. It includes a mounting connection structure and two snap-fit ​​connection structures. The mounting connection structure is used to install the filter bag assembly (10) and connect the filter bag assembly (10) to the production equipment. The two snap-fit ​​connection structures are fixed on the outside of the mounting connection structure. A quick-locking structure (30) is used to connect with a snap-fit ​​connection structure to achieve quick fixing and disassembly of the filter bag assembly (10); The fast locking structure (30) includes: The fixing ring (301) has a fixing block (302) fixed at the bottom. The fixing block (302) is snapped into the fixing groove (203) to fix the filter bag assembly (10). The connecting post (303) is fixedly set at the bottom of the fixing ring (301) and is inserted into the plug block (205) during installation; A partition plate (304) is disposed at the center inside the connecting column (303); The mounting cavity (305) is opened on both sides of the partition plate (304); The fixing base (306) is respectively set on the two walls of the two mounting cavities (305); Several limiting slide rails (307) are provided on the side wall of the fixed seat (306); Several limiting sliders (308) are slidably connected to the limiting slide rail (307); Two movable plates (309) are respectively set between several limit sliders (308); Two snap-fit ​​pins (310) are provided on the outer wall of the two movable plates (309) for snapping into the snap-fit ​​holes (206); Two compression springs (311) are provided on the inner walls of the two movable plates (309) for ejecting the snap-fit ​​pins (310).

2. The high-temperature resistant composite filter bag structure according to claim 1, characterized in that, The inner high-temperature resistant layer (101) is a blended fabric of zirconium oxide ceramic fiber and nickel-based alloy fiber with a thickness of 0.3-0.5 mm.

3. The high-temperature resistant composite filter bag structure according to claim 2, characterized in that, The middle filter layer (102) is a composite wrinkled membrane of polyimide nanofibers and MOF crystals, with a wrinkle spacing of 0.5-1 mm and a thickness of 0.2-0.3 mm.

4. The high-temperature resistant composite filter bag structure according to claim 3, characterized in that, The outer anti-erosion layer (103) is a PTFE-modified PPS fiber woven fabric with a micro-nano dual-scale hydrophobic and oleophobic coating on the surface. The coating is composed of fluorocarbon chain modified silica nanoparticles with a thickness of 50-100μm.

5. The high-temperature resistant composite filter bag structure according to claim 4, characterized in that, The mounting connection structure includes: Pipe body (201) for mounting filter bag assembly (10); A connecting ring (202) is fixedly installed on the top of the pipe body (201), and a fixing groove (203) is provided inside it. The fixing groove (203) is used to install the snap-fit ​​filter bag assembly (10). The connecting fixing block (204) is fixedly connected to the outer wall of the connecting ring (202) for bolt connection with the production equipment.

6. The high-temperature resistant composite filter bag structure according to claim 5, characterized in that, The snap-fit ​​connection structure includes: The plug-in block (205) is fixedly mounted on the outer wall of the connecting ring (202); The snap-fit ​​hole (206) is formed on the outer wall of the plug-in block (205) and extends through the outer wall of the plug-in block (205).

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