Garbage incineration flue gas environmental protection dust removal filter bag

Abstract

The application provides a garbage incineration flue gas environmental protection dust removal filter bag and belongs to the technical field of dust removal filter bags. The garbage incineration flue gas environmental protection dust removal filter bag comprises a dust removal filter bag body, the dust removal filter bag body is sequentially fixedly connected by a gradient filter layer, a catalytic function layer and an anti-corrosion surface layer, is used for intercepting a large amount of dust and fly ash contained in garbage incineration flue gas, a catalytic structure is arranged in the catalytic function layer and is used for supporting the dust removal filter bag body and catalytically decomposing harmful gas passing through, and a gas guide structure is arranged at the bottom of the gradient filter layer and is used for making the flue gas produce cyclone and the coarse particles in the flue gas settle in advance. The garbage incineration flue gas environmental protection dust removal filter bag is provided with a three-layer composite structure of the gradient filter layer, the catalytic function layer and the anti-corrosion surface layer, the pore diameter of the three-layer composite structure decreases in sequence, the gradient filtration and the catalytic function are integrated in the dust removal filter bag, PM2.5 ultra-low emission is realized, the garbage incineration flue gas physical interception and chemical purification are cooperated, and the problem of multi-pollutant cooperative treatment is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dust removal filter bags, in particular to a garbage incineration flue gas environmental protection dust removal filter bag. BACKGROUND

[0002] The dust removal filter bag is a high-efficiency dust removal filter material, has good ventilation performance, high dust removal efficiency, and certain acid resistance, alkali resistance and heat resistance, adopts multi-edge brushing during weaving to improve the thickness of the fabric, is elastic, and has very good dust removal effect. The dust removal filter bag takes polyester short fibers or long fibers as raw materials, and the service life is generally 4-6 times that of glass fiber fabric.

[0003] The existing dust removal filter bag cannot simultaneously achieve physical interception and chemical purification of garbage incineration flue gas, cannot solve the problem of common treatment of multiple pollutants, and after the dust removal filter bag is installed, a skeleton support needs to be installed, therefore, the present application provides a garbage incineration flue gas environmental protection dust removal filter bag to meet the needs. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a garbage incineration flue gas environmental protection dust removal filter bag to solve the problem that the existing dust removal filter bag cannot simultaneously achieve physical interception and chemical purification of garbage incineration flue gas, cannot solve the problem of common treatment of multiple pollutants, and after the dust removal filter bag is installed, a skeleton support needs to be installed.

[0005] To solve the above technical problems, the present application provides the following technical scheme:

[0006] A garbage incineration flue gas environmental protection dust removal filter bag, comprising a dust removal filter bag body; the dust removal filter bag body is fixedly connected in sequence by a gradient filtration layer, a catalytic functional layer and an anti-corrosion surface layer, and is used for intercepting a large amount of dust and fly ash contained in garbage incineration flue gas; a catalytic structure is arranged in the interior of the catalytic functional layer, and is used for supporting the dust removal filter bag body and catalytically decomposing harmful gas passing through; a gas guide structure is arranged at the bottom of the gradient filtration layer, and is used for making the flue gas produce a cyclone, so that the coarse particles in the flue gas are precipitated in advance, and the dust load on the surface of the gradient filtration layer is reduced.

[0007] Optionally, the material of the catalytic functional layer is a glass fiber base material, the pore size is 5-10 microns, the shape of the catalytic functional layer is matched with the catalytic structure, a gap extending to the bottom is formed at the top of the catalytic functional layer, and is used for inserting the catalytic structure, and the gap at the top of the catalytic functional layer is sealed and sewn by a PTFE monofilament suture.

[0008] Optionally, the catalytic structure comprises a support unit for support and a catalytic unit for catalyzing harmful gas; the support unit comprises a support pipe at the bottom of the catalytic functional layer, a plurality of linearly distributed catalytic honeycomb holes are formed on the support pipe, every two adjacent catalytic honeycomb holes form a group, a separation groove is formed between every two adjacent groups, a catalytic clamping groove is formed at the bottom of the support pipe, the depth of the catalytic clamping groove is slightly smaller than the length of the support pipe, and the top end of the support pipe is fixedly connected with a limiting clamping strip.

[0009] Optionally, the catalytic unit comprises a guide ring which is attached to the bottom of the support pipe, one side of the guide ring is fixedly connected with a ring-shaped plate, one side of the ring-shaped plate is fixedly connected with a plurality of catalytic plates which are arranged in a ring shape, the plurality of catalytic plates correspond to the plurality of catalytic honeycomb holes one by one, the guide ring is a semi-circular ring structure, and the support pipe and the guide ring are connected through the catalytic clamping groove and the catalytic plate.

[0010] Optionally, the limiting clamping strip is composed of a plurality of elastic clamping pieces arranged in a ring shape; the elastic clamping piece is sequentially fixedly connected with a pressing section, a clamping section and a deformation section, the bottom of the deformation section is fixedly connected with the top of the support pipe, the top of the deformation section is fixedly connected with the clamping section, the top of the clamping section is fixedly connected with the pressing section, the pressing section is arranged in parallel with the support pipe, the clamping section is an arc-shaped structure with a concave shape, and the deformation section is an arc-shaped structure.

[0011] Optionally, the material of the gradient filter layer is PPS / P84 blended fiber, the PPS / P84 blended fiber is woven into an interlaced fiber mesh structure, the pore size of the gradient filter layer is 20-50 microns, and the outer wall of the gradient filter layer is fixedly connected with the inner wall of the catalytic functional layer in a matched manner; a plurality of gradient ring holes are formed in the inner wall of the gradient filter layer, the gradient ring holes are in a trapezoidal cross-section corrugated shape, and the depths of the plurality of gradient ring holes increase from the bag opening to the bag bottom.

[0012] Optionally, the air guide structure comprises an air guide disc connected to the bottom of the gradient filter layer, and the inner wall of the air guide disc is fixedly connected with a plurality of spiral guide vanes arranged in a ring shape.

[0013] Optionally, the air guide disc is connected by a first air guide section, a second air guide section and a third air guide section, the first air guide section is a bowl-shaped structure, the bottom of the first air guide section is fixedly connected with a second air guide section in a concave shape, one end of the second air guide section is fixedly connected with a third air guide section in an everted shape, the bottom of the second air guide section is fixedly connected with the bottom of the gradient filter layer, and the outer wall of the third air guide section is fixedly connected with the inner wall of the gradient filter layer.

[0014] Optionally, the material of the anti-corrosion surface layer is PTFE film material, the pore size is 0.1-0.5 microns, and the inner and outer surface walls of the anti-corrosion surface layer are provided with a hydrophobic layer.

[0015] Optionally, the surface wall of the hydrophobic layer is provided with a micro-nano protrusion with a symmetrical gradient pore structure, which is used to simulate the lotus leaf surface micro-nano structure, so that the surface has super-hydrophobic performance.

[0016] Compared with the prior art, the present application has at least the following beneficial effects:

[0017] In the above scheme, the three-layer composite structure of the gradient filter layer, the catalytic functional layer and the anti-corrosion surface layer is used, the pore size of the three-layer composite structure decreases in turn, the gradient filtration and the catalytic function are integrated in the dust filter bag, PM2.5 ultra-low emission is realized, the physical interception and chemical purification of the waste incineration flue gas are cooperated, and the problem of cooperative treatment of multiple pollutants is solved.

[0018] By setting the catalytic structure, the catalytic structure supports the dust filter bag body and catalytically decomposes the harmful gas passing through, the support pipe is used to support the entire catalytic functional layer, thereby providing physical support for the entire dust filter bag body, ensuring that the surface of the dust filter bag body is flat and unfolded, preventing dust accumulation or blind area caused by wrinkles, ensuring uniform distribution of the dust layer, maintaining high-efficiency filtering state, the catalytic plate is provided with a plurality of through attachment holes on its two sides, the nano catalyst is loaded in the attachment holes, and the flue gas passing through the catalytic honeycomb holes reacts with the catalyst.

[0019] By setting the limiting clamping strip, the entire dust filter bag body is clamped at the entrance edge position of the flower plate hole through the limiting clamping strip, the sealing performance of the bag opening of the dust filter bag body is ensured, when the dust filter bag body needs to be replaced, it can be directly pulled out, and the installation and disassembly steps are simplified.

[0020] By setting the spiral guide vane, the spiral guide vane deflects the flue gas to form a cyclone, the tangential velocity of the flue gas is improved, and the coarse particles slide to the bottom due to the centrifugal force impacting the surface wall of the gradient filter layer, thereby reducing the dust load of the surface layer of the gradient filter layer.

[0021] By setting the hydrophobic layer, the hydrophobic layer is used to simulate the lotus leaf surface micro-nano structure, so that the surface has super-hydrophobic performance, reduces water vapor adsorption, prevents dust from being humidified and hardened, and the hydrophobic barrier prevents acidic droplets from penetrating and corroding the surface of the anti-corrosion surface layer, thereby increasing the service life of the anti-corrosion surface layer. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings incorporated herein and forming part of the specification show embodiments of the present application and, together with the specification, further serve to explain the principles of the present application and to enable one of ordinary skill in the art to make and use the present application.

[0023] Figure 1 It is a three-dimensional structure schematic diagram of the garbage incineration flue gas environmental protection dust removal filter bag;

[0024] Figure 2 It is a three-dimensional structure schematic diagram of the garbage incineration flue gas environmental protection dust removal filter bag;

[0025] Figure 3 It is a three-dimensional structure schematic diagram of the garbage incineration flue gas environmental protection dust removal filter bag;

[0026] Figure 4 It is a three-dimensional structure schematic diagram of the garbage incineration flue gas environmental protection dust removal filter bag;

[0027] Figure 5 It is a three-dimensional structure schematic diagram of the garbage incineration flue gas environmental protection dust removal filter bag;

[0028] Figure 6 It is a three-dimensional structure schematic diagram of the garbage incineration flue gas environmental protection dust removal filter bag;

[0029] Figure 7 It is a three-dimensional structure schematic diagram of the garbage incineration flue gas environmental protection dust removal filter bag; Figure 6 It is a three-dimensional structure schematic diagram of the garbage incineration flue gas environmental protection dust removal filter bag;

[0030] Figure 8 It is a three-dimensional structure schematic diagram of the garbage incineration flue gas environmental protection dust removal filter bag;

[0031] Figure 9 It is a three-dimensional structure schematic diagram of the garbage incineration flue gas environmental protection dust removal filter bag; Figure 8 It is a three-dimensional structure schematic diagram of the garbage incineration flue gas environmental protection dust removal filter bag.

[0032] Reference signs:

[0033] 1, dust removal filter bag body; 11, gradient filter layer; 111, gradient ring hole; 12, catalytic functional layer; 13, corrosion-resistant surface layer; 131, hydrophobic layer; 1311, micro-nano bump; 14, catalytic structure; 141, limiting clamping strip; 1411, pressing section; 1412, clamping section; 1413, deformation section; 142, support pipe; 143, catalytic plate; 144, annular plate; 145, guide ring; 146, catalytic honeycomb hole; 147, separation groove; 148, catalytic clamping groove; 15, gas guide structure; 151, spiral guide vane; 152, gas guide disc; 1521, first gas guide section; 1522, second gas guide section; 1523, third gas guide section.

[0034] As shown in the drawings, in order to clearly realize the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application in this specific structure, device and environment, and those skilled in the art can adjust or modify these devices and environment according to specific needs. DETAILED DESCRIPTION

[0035] The garbage incineration flue gas environmental protection dust removal filter bag provided by the present application is described in detail below in combination with the drawings and specific embodiments. It should be noted that, in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement some known technologies; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the present application.

[0036] It should be noted that the terms "one embodiment", "an embodiment", "exemplary embodiment", "some embodiments", etc. in the description indicate that the described embodiment can include a specific feature, structure or characteristic, but not necessarily every embodiment includes the specific feature, structure or characteristic. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it should be within the knowledge of those skilled in the related art to realize this feature, structure or characteristic in combination with other embodiments (whether or not explicitly described).

[0037] Generally, the terms can be understood at least in part from the context in which they are used. For example, depending on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular or can be used to describe combinations of features, structures, or characteristics, in the plural, without necessarily dictating whether any such feature, structure, or characteristic is required, mandatory, or essential to the techniques. Additionally, the term "based on" can be understood as not necessarily of a set of exclusive factors, but, alternatively, as allowing for existence of additional factors not explicitly described.

[0038] It can be understood that the meanings of "on", "above", and "over" in the present application should be interpreted in the broadest way, so that "on" not only means "directly on" something, but also includes the meaning of "on" something with intervening features or layers therebetween, and "above" or "over" not only means the meaning of "above" or "over" something, but also can include the meaning of "above" or "over" something without intervening features or layers therebetween.

[0039] In addition, spatially relative terms such as "under", "below", "lower", "over", "upper" and the like can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein can be interpreted accordingly.

[0040] As Figures 1 to 9As shown, the embodiment of the present application provides a waste incineration flue gas environmental protection dust removal filter bag, comprising a dust removal filter bag body 1; the dust removal filter bag body 1 is fixedly connected in sequence by a gradient filter layer 11, a catalytic functional layer 12 and an anti-corrosion surface layer 13, through the three-layer composite structure of the gradient filter layer 11, the catalytic functional layer 12 and the anti-corrosion surface layer 13, and through the pore size of the three-layer composite structure decreasing in sequence, PM2.5 ultra-low emission is realized, physical interception and chemical purification of waste incineration flue gas are realized, the gradient filtration and the catalytic function are integrated in the dust removal filter bag body 1, the problem of multi-pollutant collaborative treatment is solved, and the dust and fly ash contained in the waste incineration flue gas are intercepted; a catalytic structure 14 is arranged in the inside of the catalytic functional layer 12, used for supporting the dust removal filter bag body 1, and simultaneously catalytically decomposing the harmful gas passing through; a gas guide structure 15 is arranged at the bottom of the gradient filter layer 11, used for making the flue gas produce cyclone, the coarse particles in the flue gas are settled in advance, and the dust load on the surface of the gradient filter layer 11 is reduced.

[0041] As shown in Figure 1 and Figure 2 As shown, the material of the catalytic functional layer 12 is glass fiber base material, the pore size is 5-10 microns, the shape of the catalytic functional layer 12 is matched with the catalytic structure 14, a gap extending to the bottom is arranged at the top of the catalytic functional layer 12, used for inserting the catalytic structure 14, the top gap of the catalytic functional layer 12 is sealed and sewn by PTFE monofilament suture, the sewing density is greater than or equal to 12 needles per centimeter, and the bag breaking caused by the conventional suture being easily fused at high temperature is avoided.

[0042] As shown in Figures 5 to 7As shown, the catalytic structure 14 includes a support unit for support and a catalytic unit for catalyzing harmful gas; the support unit includes a support pipe 142 at the bottom of the catalytic functional layer 12, which is used to support the entire catalytic functional layer 12, and in turn provides physical support for the entire dust removal filter bag body 1, ensures that the dust removal filter bag body 1 is evenly spread on the surface, prevents wrinkles from causing dust accumulation or blind area of filtration, ensures uniform distribution of the dust layer, maintains high-efficiency filtration state, the support pipe 142 is provided with a plurality of linearly distributed catalytic honeycomb holes 146, the catalytic honeycomb holes 146 provide a reaction channel for the incineration flue gas and the catalytic plate 143, every two adjacent catalytic honeycomb holes 146 form a group, a separation groove 147 is arranged between every two adjacent groups, the bottom of the support pipe 142 is provided with a catalytic clamping groove 148, the catalytic clamping groove 148 and the catalytic plate 143 are connected by plug-in type, the depth of the catalytic clamping groove 148 is slightly smaller than the length of the support pipe 142, the top end of the support pipe 142 is fixedly connected with a limiting clamping strip 141, when the dust removal filter bag body 1 is installed in the flower plate hole, the limiting clamping strip 141 limits the entire dust removal filter bag body 1 at the entrance edge position of the flower plate hole, ensuring the sealing of the bag opening of the dust removal filter bag body 1, when the dust removal filter bag body 1 needs to be replaced, it can be directly pulled out, the installation and disassembly steps are simplified; the catalytic unit includes a guide ring 145 which is attached to the bottom of the support pipe 142, one side of the guide ring 145 is fixedly connected with an annular plate 144, one side of the annular plate 144 is fixedly connected with a plurality of catalytic plates 143 which are arranged in a ring shape, a plurality of adhesion holes are arranged on the surface of the catalytic plate 143, the nano V2O5-WO3 / TiO2 catalyst is loaded in the adhesion holes at a proportion of 5wt%, a plurality of catalytic plates 143 correspond to a plurality of catalytic honeycomb holes 146 one by one, the guide ring 145 is a semi-circular ring structure, the semi-circular ring structure of the guide ring 145 is used to limit the bottom end of the support pipe 142, avoiding the problem that the entire catalytic plate 143 is difficult to take out after being inserted into the catalytic clamping groove 148, the support pipe 142 and the guide ring 145 are connected by sliding through the catalytic clamping groove 148 and the catalytic plate 143.

[0043] The limiting clamping strip 141 is composed of a plurality of annular elastic clamping pieces; the elastic clamping piece is sequentially and fixedly connected by a pressing section 1411, a clamping section 1412 and a deformation section 1413, the bottom of the deformation section 1413 is fixedly connected with the top of the supporting pipe 142, the top of the deformation section 1413 is fixedly connected with the clamping section 1412, the top of the clamping section 1412 is fixedly connected with the pressing section 1411, the pressing section 1411 is arranged in parallel with the supporting pipe 142, the clamping section 1412 is an arc-shaped structure concave inward, the deformation section 1413 is an arc-shaped structure, when the dust removal filter bag body 1 is installed, the bottom of the dust removal filter bag body 1 is first inserted into the inside of the flower plate hole, until the deformation section 1413 contacts with the hole opening of the flower plate hole, then the pressing section 1411 is continuously pressed, the deformation section 1413 is extruded inwardly and compressed and deformed under the extrusion force, until the clamping section 1412 is clamped with the edge position of the hole opening, so as to limit and fix the dust removal filter bag body 1.

[0044] As shown in Figure 1 and Figure 3 , the material of the gradient filter layer 11 is PPS / P84 blended fiber, the PPS / P84 blended fiber is woven into an interlaced fiber mesh structure, PPS fiber and P84 fiber are blended at a mass ratio of 7:3, the PPS / P84 blended fiber is laid by a double combing machine, a stepped hot pressing process is adopted, the pore size is 20-50 microns, the outer wall of the gradient filter layer 11 is fixedly connected with the inner wall of the catalytic functional layer 12 in a matched mode; a plurality of gradient ring holes 111 are arranged on the inner wall of the gradient filter layer 11, the gradient ring holes 111 are in a trapezoidal cross-section corrugated shape, and the depths of the plurality of gradient ring holes 111 increase from the bag opening to the bag bottom, through the plurality of gradient ring holes 111, the filtration area is increased by 40%, and at the same time, back-blowing dead angles are avoided.

[0045] As shown in Figure 3 and Figure 4As shown, the air guide structure 15 comprises an air guide disc 152 connected to the bottom of the gradient filter layer 11, and the inner wall of the air guide disc 152 is fixedly connected with a plurality of annularly distributed spiral flow guide vanes 151; the air guide disc 152 is connected by a first air guide section 1521, a second air guide section 1522 and a third air guide section 1523, the first air guide section 1521 is in a bowl-shaped structure, the bottom of the first air guide section 1521 is fixedly connected with the second air guide section 1522 in a concave shape, one end of the second air guide section 1522 is fixedly connected with the third air guide section 1523 in an everted shape, the bottom of the second air guide section 1522 is fixedly connected with the bottom of the gradient filter layer 11, and the outer surface wall of the third air guide section 1523 is fixedly connected with the inner surface wall of the gradient filter layer 11; the high-temperature-resistant adhesive silicone glue is fixed on the inner wall of the filter bag, the flue gas is shunted through the first air guide section 1521, and after being shunted, the flue gas moves to the surface wall direction of the gradient filter layer 11 under the guidance of the second air guide section 1522 and the third air guide section 1523, and at the same time, when the flue gas enters the bottom of the gradient filter layer 11, the spiral flow guide vanes 151 deflect the flue gas to form a cyclone, the tangential velocity of the flue gas is improved, and at the same time, the coarse particles slide to the bottom due to the centrifugal force impacting the surface wall of the gradient filter layer 11, so that the dust load of the surface layer of the gradient filter layer 11 is reduced.

[0046] As shown in Figure 1 , Figure 8 and Figure 9 , the material of the corrosion-resistant surface layer 13 is PTFE film material, the pore size is 0.1-0.5 microns, the inner surface wall and the outer surface wall of the corrosion-resistant surface layer 13 are provided with a hydrophobic layer 131, the surface wall of the hydrophobic layer 131 is provided with micro-nano protrusions 1311 with a symmetrical gradient pore structure, which is used for simulating the lotus leaf surface micro-nano structure, so that the surface has super-hydrophobic performance, reduces water vapor adsorption, prevents dust from being humidified and caked, and at the same time, the hydrophobic barrier prevents acidic droplets from penetrating and corroding the surface of the corrosion-resistant surface layer 13, thereby increasing the service life of the corrosion-resistant surface layer 13.

[0047] The working principle of the technical scheme provided by the present application is as follows: first, install the catalytic structure 14, insert the catalytic plate 143 attached with the V2O5-WO3 / TiO2 catalyst into the catalytic clamping groove 148, then insert the catalytic clamping groove 148 with the installed catalytic plate 143 into the gap on the catalytic functional layer 12, and then seal and sew with PTFE monofilament sewing thread.

[0048] Install the dust removal filter bag body 1, first insert the bottom of the dust removal filter bag body 1 into the inside of the flower plate hole until the deformation section 1413 contacts the hole opening, continue to press the pressing section 1411, the deformation section 1413 is compressed and deformed inwardly after being extruded by the extrusion force, until the clamping section 1412 is clamped with the edge position of the hole opening, so as to limit and fix the dust removal filter bag body 1, then restore the water spraying pipe to the original position, tighten the screw, and cover the cover plate door.

[0049] The present application encompasses any alternatives, modifications, equivalent methods and solutions made to the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits, etc. are not described in detail.

[0050] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, which should be considered as the protection scope of the present application.

Claims

1. A waste incineration flue gas environmental protection dust removal filter bag, characterized in that, include: Dust collector filter bag body; The dust removal filter bag body is composed of a gradient filtration layer, a catalytic functional layer and an anti-corrosion surface layer connected in sequence, and is used to intercept a large amount of dust and fly ash contained in the flue gas from waste incineration. The inner wall of the gradient filter layer has several gradient annular holes, which are trapezoidal cross-section pleated shapes, and the depth of the several gradient annular holes increases from the bag opening to the bag bottom. A catalytic structure, disposed inside the catalytic functional layer, is used to support the dust collector filter bag body and simultaneously catalytically decompose the passing harmful gases. The air guiding structure, located at the bottom of the gradient filter layer, is used to generate swirling flow in the flue gas, causing coarse particles in the flue gas to settle in advance and reducing the dust load on the surface of the gradient filter layer.

2. The waste incineration flue gas environmental protection dust removal filter bag according to claim 1, characterized in that, The catalytic functional layer is made of glass fiber substrate with a pore size of 5-10 micrometers. The shape of the catalytic functional layer is adapted to the catalytic structure. A slit extending from the top to the bottom of the catalytic functional layer is provided for inserting the catalytic structure. The slit at the top of the catalytic functional layer is sealed with PTFE monofilament thread.

3. The waste incineration flue gas environmental protection dust removal filter bag according to claim 1, characterized in that, The catalytic structure includes a support unit for support and a catalytic unit for catalyzing harmful gases; The support unit includes a support tube located at the bottom of the catalytic functional layer. The support tube has a number of catalytic honeycomb holes arranged in a straight line. Each pair of adjacent catalytic honeycomb holes forms a group, and a partition groove is provided between each pair of adjacent groups. A catalytic slot is provided at the bottom of the support tube. The depth of the catalytic slot is slightly less than the length of the support tube. A limit strip is fixedly connected to the top of the support tube.

4. The waste incineration flue gas environmental protection dust removal filter bag according to claim 3, characterized in that, The catalytic unit includes a guide ring that fits into the bottom of the support tube. An annular plate is fixedly connected to one side of the guide ring, and several catalytic plates arranged in a ring are fixedly connected to one side of the annular plate. Each of the catalytic plates corresponds to a catalytic honeycomb hole. The guide ring has a semi-circular structure. The support tube and the guide ring are slidably connected by a catalytic slot and a catalytic plate.

5. The waste incineration flue gas environmental protection dust removal filter bag according to claim 3, characterized in that, The limiting strip is composed of several elastic cards arranged in a ring; The elastic card is formed by a pressing section, a snap-fit ​​section and a deformation section fixedly connected in sequence. The bottom of the deformation section is fixedly connected to the top of the support tube. The top of the deformation section is fixedly connected to the snap-fit ​​section. The top of the snap-fit ​​section is fixedly connected to the pressing section. The pressing section is arranged parallel to the support tube. The snap-fit ​​section is a concave arc-shaped structure. The deformation section is an arc-shaped structure.

6. The waste incineration flue gas environmental protection dust removal filter bag according to claim 1, characterized in that, The gradient filter layer is made of PPS / P84 blended fiber, which is woven into an interlaced fiber web structure with a pore size of 20-50 micrometers. The outer wall of the gradient filter layer is adapted and fixedly connected to the inner wall of the catalytic functional layer.

7. The waste incineration flue gas environmental protection dust removal filter bag according to claim 1, characterized in that, The air guiding structure includes an air guiding disk connected to the bottom of the gradient filter layer, and a number of spiral guide vanes arranged in a ring are fixedly connected to the inner wall of the air guiding disk.

8. The waste incineration flue gas environmental protection dust removal filter bag according to claim 7, characterized in that, The air guide plate is composed of a first air guide section, a second air guide section and a third air guide section connected together. The first air guide section has a bowl-shaped structure. The bottom of the first air guide section is fixedly connected to a second air guide section that is concave in shape. One end of the second air guide section is fixedly connected to a third air guide section that is outwardly flared. The bottom of the second air guide section is fixedly connected to the bottom of the gradient filter layer. The outer wall of the third air guide section is fixedly connected to the inner wall of the gradient filter layer.

9. The waste incineration flue gas environmental protection dust removal filter bag according to claim 1, characterized in that, The anti-corrosion surface layer is made of PTFE film material with a pore size of 0.1-0.5 micrometers, and both the inner and outer surfaces of the anti-corrosion surface layer are provided with hydrophobic layers.

10. The waste incineration flue gas environmental protection dust removal filter bag according to claim 9, characterized in that, The surface of the hydrophobic layer is provided with micro-nano bumps with a symmetrical gradient pore structure, which are used to imitate the micro-nano structure of lotus leaf surface, so that its surface has superhydrophobic properties.

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