A composite filter bag made of PPS and PTFE for power plants

Abstract

This utility model discloses a PPS / PTFE composite filter bag for power plants, comprising an annular plate, an annular ring, and a filter bag. A support frame is fixedly connected to the bottom of the annular ring, and a vertical plate is fixedly connected to the bottom of the annular plate. The filter bag is located between the support frame and the vertical plate, with its top extending into the interior of the annular plate. A movable rod is movably connected to the outside of the annular plate, and a fixing block is fixedly connected to one end of the movable rod. This utility model relates to the field of dust collector filter bag technology. This PPS / PTFE composite filter bag for power plants features a composite structure of an outer layer of PPS fiber, a middle layer of activated carbon, and an inner layer of PTFE membrane. Combined with a quick-installation mechanism, it achieves high-efficiency filtration, long service life, and easy maintenance. This filter bag is suitable for high-temperature, high-humidity, and highly corrosive flue gas environments such as coal-fired power plants and biomass power plants, significantly reducing operating costs and emission concentrations. The fixing plate, under the elastic force of a second spring, can dislodge dust from the filter bag.

Description

Technical Field

[0001] This utility model relates to the field of dust collector bag technology, specifically a PPS and PTFE composite filter bag for power plants. Background Technology

[0002] Dust collector bags are considered the heart of baghouse dust collectors. They are generally called dust collector bags or dust filter bags and are a key component in the operation of baghouse dust collectors. Typically, cylindrical filter bags are suspended vertically inside the dust collector. The fabric and design of dust collector bags should strive for high-efficiency filtration, easy dust removal, and durability. The selection of dust collector bags is crucial, as it directly affects the dust collection efficiency of the dust collector. The selection of dust collector bags should be based on the following factors: gas temperature, humidity and chemical properties, particle size, dust concentration, filtration velocity, and dust removal method.

[0003] In the process of flue gas treatment in power plants, traditional filter bags often face the following problems: (1) Insufficient temperature resistance: The flue gas temperature in coal-fired power plants can reach over 190℃, and ordinary filter bags are prone to failure due to high-temperature oxidation; (2) Poor corrosion resistance: The flue gas contains acidic gases such as SO2 and NOx, which easily corrode the filter material; (3) Low filtration efficiency: Fine dust (PM2.5) has a high penetration rate, making it difficult to meet the requirements for ultra-low emissions; (4) Difficulty in cleaning: Dust easily adheres to the surface of the filter bag, leading to increased pressure difference and increased energy consumption.

[0004] In the existing technology, PPS (polyphenylene sulfide) filter bags are widely used due to their good temperature resistance and low cost, but their oxidation resistance is insufficient; PTFE (polytetrafluoroethylene) filter bags have strong corrosion resistance, but they are expensive and prone to embrittlement. Existing composite filter bags have problems such as weak interlayer bonding and poor structural stability, which make it difficult to meet the long-term operation requirements of power plants. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a PPS and PTFE composite filter bag specifically for power plants, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a PPS / PTFE composite power plant filter bag, comprising an annular plate, an annular ring, and a filter bag. A support frame is fixedly connected to the bottom of the annular ring, and a vertical plate is fixedly connected to the bottom of the annular plate. The filter bag is located between the support frame and the vertical plate, and the top of the filter bag extends into the interior of the annular plate. A movable rod is movably connected to the outside of the annular plate, and a fixing block is fixedly connected to one end of the movable rod. A first spring is fixedly connected to the surface of the movable rod and to the side of the inner wall of the annular plate opposite to the fixing block. A horizontal bar is fixedly connected to the top and bottom of one side of the vertical plate, and a movable plate is slidably connected between the surfaces of the two horizontal bars. A connecting rod is fixedly connected to the top and bottom of one side of the movable plate. One end of the connecting rod passes through the vertical plate and extends to one side of the vertical plate. A fixing plate is fixedly connected to the end of the connecting rod extending to the vertical plate.

[0007] Preferably, a support rod is fixedly connected between the bottom of the annular ring and the top of the annular plate, and a mounting plate is fixedly connected to the bottom of the surface of the annular plate.

[0008] Preferably, a handle is fixedly connected to the other end of the movable rod, and the number of movable rods is set to four.

[0009] Preferably, a stop block is fixedly connected to one end of the crossbar, and a second spring is fixedly connected to the surface of the crossbar between the movable plate and the side opposite to the stop block.

[0010] Preferably, the bag includes an outer layer, an inner layer, and a middle layer.

[0011] Preferably, the outer layer is made of PPS fiber needle-punched felt with a thickness of 1.5-2.0 mm and a basis weight of 500-600 g / m², the inner layer is made of PTFE membrane filter material with a thickness of 0.8-1.2 mm, a basis weight of 300-400 g / m², a pore size of 0.5-1.0 μm, and an air permeability of 80-120 L / m²·s, and the middle layer is a powdered activated carbon layer with a thickness of 0.3-0.5 mm and a specific surface area ≥1500 m² / g. Beneficial effects

[0012] This utility model provides a PPS / PTFE composite filter bag specifically for power plants. Compared with the prior art, it has the following advantages: The PPS / PTFE composite filter bag for power plants has a support frame fixedly connected to the bottom of an annular ring, and a vertical plate fixedly connected to the bottom of the annular plate. The filter bag is located between the support frame and the vertical plate, with the top of the bag extending into the interior of the annular plate. A movable rod is movably connected to the outside of the annular plate, and a fixing block is fixedly connected to one end of the movable rod. A first spring is fixedly connected to the surface of the movable rod, on the side of the annular plate opposite to the fixing block. Horizontal bars are fixedly connected to the top and bottom of one side of the vertical plate, and a sliding connection is formed between the surfaces of the two horizontal bars. The movable plate has connecting rods fixedly connected to both the top and bottom of one side. One end of the connecting rod passes through the vertical plate and extends to one side of the vertical plate. A fixing plate is fixedly connected to the end of the connecting rod extending to the vertical plate. The composite structure of the outer layer of PPS fiber, the middle layer of activated carbon, and the inner layer of PTFE membrane, combined with the quick installation mechanism, achieves high-efficiency filtration, long service life, and easy maintenance. This filter bag is suitable for high-temperature, high-humidity, and highly corrosive flue gas environments such as coal-fired power plants and biomass power plants. It can significantly reduce operating costs and emission concentrations. The fixing plate, under the elastic force of the second spring, can knock off the dust on the filter bag. Attached Figure Description

[0013] Figure 1 This is a front view of the structure of this utility model; Figure 2 This is a schematic diagram of the structural support frame of this utility model; Figure 3 This is a top view of the annular plate structure of this utility model; Figure 4 This is a cross-sectional view of the annular plate structure of this utility model; Figure 5 This is an exploded view of the bag structure of this utility model; Figure 6 The structure of this utility model Figure 1 A magnified view of a portion of point A in the middle.

[0014] In the diagram: 1-ring plate, 2-ring ring, 3-cloth bag, 31-outer layer, 32-inner layer, 33-middle layer, 4-support frame, 5-vertical plate, 6-movable rod, 7-fixed block, 8-first spring, 9-horizontal bar, 10-movable plate, 11-connecting rod, 12-fixed plate, 13-support rod, 14-mounting plate, 15-handle, 16-stop block, 17-second spring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-6 This utility model provides a technical solution: a PPS / PTFE composite filter bag for power plants, comprising an annular plate 1, an annular ring 2, and a filter bag 3. The filter bag 3 includes an outer layer 31, an inner layer 32, and a middle layer 33. The outer layer 31 is made of PPS fiber needle-punched felt with a thickness of 1.5-2.0 mm and a basis weight of 500-600 g / m². The inner layer 32 is made of PTFE membrane filter material with a thickness of 0.8-1.2 mm, a basis weight of 300-400 g / m², and a pore size of 0.5-1.0 μm. The air permeability is 80-120 L / m²·s, and the middle layer 33 is a powdered activated carbon layer with a thickness of 0.3-0.5 mm and a specific surface area ≥1500 m² / g. A support rod 13 is fixedly connected between the bottom of the annular ring 2 and the top of the annular plate 1, and an mounting plate 14 is fixedly connected to the bottom of the surface of the annular plate 1. A support frame 4 is fixedly connected to the bottom of the annular ring 2, and a vertical plate 5 is fixedly connected to the bottom of the annular plate 1. The cloth bag 3 is located between the support frame 4 and the vertical plate 5. The top extends into the interior of the annular plate 1. A movable rod 6 is movably connected to the outside of the annular plate 1. A handle 15 is fixedly connected to the other end of the movable rod 6. There are four movable rods 6. A fixing block 7 is fixedly connected to one end of the movable rod 6. A first spring 8 is fixedly connected between the surface of the movable rod 6 and the side of the inner wall of the annular plate 1 opposite to the fixing block 7. A horizontal bar 9 is fixedly connected to the top and bottom of one side of the vertical plate 5. A stop block 16 is fixedly connected to one end of the horizontal bar 9. A second spring 17 is fixedly connected between the surface of the horizontal bar 9 and the side of the movable plate 10 opposite to the stop block 16. A movable plate 10 is slidably connected between the surfaces of the two horizontal bars 9. A connecting rod 11 is fixedly connected to the top and bottom of one side of the movable plate 10. One end of the connecting rod 11 passes through the vertical plate 5 and extends to one side of the vertical plate 5. A fixing plate 12 is fixedly connected to the end of the connecting rod 11 extending to the vertical plate 5. At the same time, the contents not described in detail in this specification are all prior art known to those skilled in the art.

[0017] In use, there is a certain distance between the support frame 4 and the vertical plate 5. The distance between the fixed plate 12 and the support frame 4 is opened by the movable plate 10. Then, the cloth bag 3 is put on the support frame 4, and the top of the cloth bag 3 is turned over and put inside the annular plate 1. The movable rod 6 is released. Under the elastic force of the first spring 8, the fixed block 7 will be pressed tightly against the cloth bag 3 to limit the cloth bag 3. The whole is installed in the place where filtration is required by the mounting plate 14. After the cloth bag 3 filters, by pulling the movable plate 10 and then releasing it, under the elastic force of the second spring 17, the fixed plate 12 will push the cloth bag 3 to bounce and remove the dust on it.

[0018] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0019] 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 PPS / PTFE composite power plant filter bag, comprising an annular plate (1), an annular ring (2), and a filter bag (3), characterized in that: The bottom of the ring (2) is fixedly connected to a support frame (4), and the bottom of the ring plate (1) is fixedly connected to a vertical plate (5). The cloth bag (3) is located between the support frame (4) and the vertical plate (5). The top of the cloth bag (3) extends into the interior of the ring plate (1). The outside of the ring plate (1) is movably connected to a movable rod (6), and one end of the movable rod (6) is fixedly connected to a fixing block (7). A first spring (8) is fixedly connected between the surface of the movable rod (6) and the side opposite to the fixing block (7) on the inner wall of the ring plate (1). The top and bottom of one side of the vertical plate (5) are both fixedly connected to a horizontal bar (9), and a movable plate (10) is slidably connected between the surfaces of the two horizontal bars (9). The top and bottom of one side of the movable plate (10) are both fixedly connected to a connecting rod (11). One end of the connecting rod (11) passes through the vertical plate (5) and extends to one side of the vertical plate (5). The end of the connecting rod (11) extending to the vertical plate (5) is fixedly connected to a fixing plate (12).

2. The PPS and PTFE composite power plant filter bag according to claim 1, characterized in that: A support rod (13) is fixedly connected between the bottom of the annular ring (2) and the top of the annular plate (1), and a mounting plate (14) is fixedly connected to the bottom of the surface of the annular plate (1).

3. The PPS and PTFE composite power plant filter bag according to claim 1, characterized in that: The other end of the movable rod (6) is fixedly connected to a handle (15), and the number of movable rods (6) is set to four.

4. The PPS and PTFE composite power plant filter bag according to claim 1, characterized in that: A stop block (16) is fixedly connected to one end of the crossbar (9), and a second spring (17) is fixedly connected between the surface of the crossbar (9) and the side opposite to the stop block (16).

5. The PPS and PTFE composite power plant filter bag according to claim 1, characterized in that: The bag (3) includes an outer layer (31), an inner layer (32), and a middle layer (33).

6. The PPS and PTFE composite power plant filter bag according to claim 5, characterized in that: The outer layer (31) is made of PPS fiber needle-punched felt with a thickness of 1.5-2.0 mm and a basis weight of 500-600 g / m². The inner layer (32) is made of PTFE membrane filter material with a thickness of 0.8-1.2 mm, a basis weight of 300-400 g / m², a pore size of 0.5-1.0 μm, and an air permeability of 80-120 L / m²·s. The middle layer (33) is a powdered activated carbon layer with a thickness of 0.3-0.5 mm and a specific surface area ≥1500 m² / g.

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