CN219050665U - Double-base cloth filter bag - Google Patents
Double-base cloth filter bag Download PDFInfo
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- CN219050665U CN219050665U CN202222873057.5U CN202222873057U CN219050665U CN 219050665 U CN219050665 U CN 219050665U CN 202222873057 U CN202222873057 U CN 202222873057U CN 219050665 U CN219050665 U CN 219050665U
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Abstract
The application provides a double base cloth filter bag, include: the dust-facing surface fiber web layer, the functional base cloth layer, the support base cloth layer and the clean gas surface fiber web layer are sequentially connected, and the dust-facing surface fiber web layer is arranged close to the flue gas to be filtered; the functional base fabric layer includes: the side of the base cloth layer, which is close to the supporting base cloth layer, is provided with a first catalyst layer, and the side of the base cloth layer, which is close to the dust face fiber net layer, is provided with a second catalyst layer. The application provides a double base cloth filter bag is equipped with one deck functional base cloth layer, contains first catalyst layer and second catalyst layer in the functional base cloth layer, adsorbs and catalytic degradation through NOx in first catalyst layer and the second catalyst layer to in the flue gas to get rid of the NOx in the flue gas simultaneously when filtering particulate matter impurity in the flue gas, reduce NOx's emission, realize filtering and denitration's dual function. No special denitration device is needed, no additional heat source is needed for heating, and the treatment cost is reduced.
Description
Technical Field
The application relates to the technical field of relevant equipment for flue gas filtration, in particular to a double-base-cloth filter bag.
Background
The municipal refuse can be efficiently reduced by the refuse incineration, and the waste incineration has quite large heat energy which can be utilized, thereby bringing benefit. The urban garbage has very complex components, and under the condition that the chemical industry is rapidly developed, a large amount of C, H, N, O and other organic matters exist in the urban garbage, and a large amount of harmful elements such as chlorine and alkali metal also exist in the urban garbage. It is the presence of these elements that cause the waste to manifest itself in large amounts as acid gases and as corrosive harmful substances during incineration. Wherein SO is 2 、NO x The discharge amount is large in proportion, and with the increase of the municipal waste base, NO x The emission amount of (2) is necessarily in an upward trend, which brings potential harm to the ecological environment and the health of people. Therefore, NO is needed in the garbage incineration x The discharge amount is strictly controlled.
After the existing garbage is incinerated, the flue gas generated by incineration needs to be filtered by using a filter bag, so that some particulate impurities are removed. Then the filtered flue gas is sent into a special denitration device for heating denitration to remove NO generated by garbage incineration x 。
However, the filtered flue gas is sent into a special denitration device for heating and denitration, so that on one hand, an additional denitration device is needed, the cost of garbage treatment and the space occupied by equipment are increased, and on the other hand, a heat source is also needed to be provided for the denitration device, and the treatment cost is increased. Meanwhile, heat contained in the flue gas generated by incineration is lost, and cannot be recycled, so that energy waste is caused.
Disclosure of Invention
In view of the above, the present application is directed to a dual-base fabric filter bag to solve or partially solve the problems set forth in the background art.
Based on the above object, the present application provides a double-base cloth filter bag comprising: the dust-facing surface fiber web layer, the functional base cloth layer, the supporting base cloth layer and the clean gas surface fiber web layer are sequentially connected, and the dust-facing surface fiber web layer is arranged close to the smoke to be filtered;
the functional base fabric layer includes: the base cloth layer, the base cloth layer is close to the side of supporting the base cloth layer is equipped with first catalyst layer, the base cloth layer is close to the side of facing dust face web layer is equipped with the second catalyst layer.
Further, the basic base cloth layer is of a grid structure, and catalyst filling blocks are filled in grids of the basic base cloth layer.
Further, the thicknesses of the first catalyst layer and the second catalyst layer are the same.
Further, the first catalyst layer and the second catalyst layer are both layered structures formed by mixing a transition metal catalyst and an adhesive.
Further, the functional base layer has a thickness less than the thickness of the support base layer.
Further, the dust facing surface web layer has a thickness of 0.6 to 1.0mm.
Further, the thickness of the functional base cloth layer is 0.1-0.15 mm.
Further, the thickness of the supporting base cloth layer is 0.4-0.5 mm.
Further, the net air surface fiber web layer has a thickness of 0.4-0.7 mm.
Further, the perimeter of the dust facing surface web layer and the perimeter of the clean air facing surface web layer are connected by a connecting line.
Further, the dust facing surface fiber web layer is composed of four polytetrafluoroethylene short fiber layers.
Further, the basic base cloth layer is a polyester staple fiber base cloth layer, an acrylic staple fiber base cloth layer, a polyphenylene sulfide staple fiber base cloth layer or an aramid staple fiber base cloth layer.
Further, the transition metal catalyst is vanadium pentoxide, manganese acetate, ferric nitrate and/or cobalt nitrate.
Further, the support base cloth layer is a polytetrafluoroethylene base cloth layer.
Further, the clean air surface web layer is composed of 4 polytetrafluoroethylene short fiber layers.
Further, the catalyst filling block is formed by spraying a transition metal catalyst solution onto a basic base cloth layer through an electrostatic spinning device and then performing high-temperature treatment.
Further, the preparation method of the transition metal catalyst solution comprises the following steps: and mixing the transition metal catalyst with a high polymer solvent, and then placing the mixture in a water bath kettle at 60 ℃ for stirring until the viscosity is 5-6 Pa.S, thus obtaining the transition metal catalyst solution.
From the above, it can be seen that the double-base cloth filter bag provided by the application is provided with a functional base cloth layer in addition to the traditional dust-facing surface fiber net layer, the supporting base cloth layer and the clean gas surface fiber net layer for filtering the flue gas to be filtered, wherein the functional base cloth layer comprises a first catalyst layer and a second catalyst layer, and NO in the flue gas is removed through the first catalyst layer and the second catalyst layer x Adsorption and catalytic degradation are carried out to remove NO in the flue gas while filtering particulate impurities in the flue gas x Reduction of NO x The dual functions of filtration and denitration are realized;
no special denitration device is required to be configured, so that the expensive equipment cost and the occupied cost of the denitration device can be saved; the reaction temperature of the adopted transition metal catalyst is consistent with the temperature of the filtering working condition, and a heat source is not required to be additionally provided for heating, so that the treatment cost is reduced; meanwhile, the heat contained in the flue gas generated by incineration can just provide proper reaction temperature for the transition metal catalyst, so that energy is saved, and cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a dual base fabric filter bag according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a structure of a dual base fabric filter bag according to an embodiment of the present application, wherein the functional base fabric layer is not provided with a catalyst layer;
FIG. 3 is a schematic structural view of a functional base fabric layer according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a portion of the mesh of the base fabric layer according to an embodiment of the present application after filling the catalyst filling blocks.
In the figure: 1. a dust-facing surface web layer; 2. a functional base fabric layer; 21. a first catalyst layer; 22. a base fabric layer; 221. a catalyst packing block; 23. a second catalyst layer; 3. supporting the base cloth layer; 4. a clean air side web layer.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present application should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Example 1
Referring to fig. 1, 2 and 3, the present application provides a dual base cloth filter bag comprising: the dust-facing surface fiber web layer 1, the functional base cloth layer 2, the support base cloth layer 3 and the clean gas surface fiber web layer 4 are sequentially connected, and the dust-facing surface fiber web layer 1 is arranged close to the flue gas to be filtered; the functional base fabric layer 2 includes: a base fabric layer 22, a first catalyst layer 21 is arranged on the side surface of the base fabric layer 22, which is close to the supporting base fabric layer 3, and a second catalyst layer 23 is arranged on the side surface of the base fabric layer 22, which is close to the dust face fiber web layer 1.
Specifically, the dust-facing surface fiber net layer 1 is composed of four polytetrafluoroethylene short fiber layers, and the dust-facing surface fiber net layer 1 is arranged close to the smoke to be filtered and plays a main role in filtering.
The supporting base cloth layer 3 is a polytetrafluoroethylene base cloth layer, is the same as the base cloth in the traditional single-base cloth filter bag, mainly plays a role of framework support, and meets the strength requirement of the national standard filter bag above 850/800N.
The net air surface fiber net layer 4 is composed of 4 polytetrafluoroethylene short fiber layers, and plays a role in covering and protecting the functional base cloth layer 2 and the supporting base cloth layer 3, and prevents the functional base cloth layer 2 and the supporting base cloth layer 3 from falling from the dust facing surface fiber net layer 1.
Further, the periphery of the dust-facing surface web layer 1 and the periphery of the clean air surface web layer 4 are connected by a connecting line. The periphery of the dust-facing surface fiber net layer 1 is connected with the periphery of the clean air surface fiber net layer 4 through a connecting wire, so that the four-layer structure of the filter cloth is firmer, and any separation of any layer is avoided.
The functional base fabric layer 2 includes: a base fabric layer 22, a first catalyst layer 21 is arranged on the side surface of the base fabric layer 22, which is close to the supporting base fabric layer 3, and a second catalyst layer 23 is arranged on the side surface of the base fabric layer 22, which is close to the dust face fiber web layer 1.
Specifically, the base fabric layer 22 is a polyester staple fiber base fabric layer, an acrylic staple fiber base fabric layer, a polyphenylene sulfide staple fiber base fabric layer, or an aramid staple fiber base fabric layer.
The two sides of the basic base cloth layer 22 are respectively provided with a first catalyst layer 21 and a second catalyst layer 23, and NO in the flue gas is treated by the two catalyst layers x Adsorption and catalytic degradation are carried out to reduce NO in the flue gas x Is arranged in the air.
The first catalyst layer 21 and the second catalyst layerThe thicknesses of the catalyst layers 23 may be the same or different, and the first catalyst layer 21 and the second catalyst layer 23 are both layered structures formed by mixing a transition metal catalyst and a binder. The transition metal catalyst in the first catalyst layer 21 and the transition metal catalyst in the second catalyst layer 23 may be the same or different, but are low temperature transition metal catalysts for adsorbing and catalytically degrading NO in flue gas x Reduction of NO x Is arranged in the air.
The transition metal catalyst is vanadium pentoxide, manganese acetate, ferric nitrate and/or cobalt nitrate, and the catalysts are low-temperature transition metal catalysts, and the reaction temperature interval of the catalysts is just consistent with the temperature (about 240 ℃) of the filtering working condition of the garbage incineration, so that the self heat of the flue gas generated after the garbage incineration can meet the reaction temperature requirement of the catalysts, and the addition of a heat source for the denitration reaction is not needed, so that the energy is saved, and the cost is reduced.
The adhesive is polyorganosiloxane, polyvinyl alcohol, polyvinyl chloride resin, polystyrene resin, polymethyl methacrylate resin, polyester resin, polyoxymethylene resin, polyamide resin and/or polyphenyl ether resin. The transition metal catalyst and the adhesive are uniformly mixed to form the first catalyst layer 21 and the second catalyst layer 23 with layered structures, and the first catalyst layer 21 and the second catalyst layer 23 can be firmly adhered to the basic base cloth layer 22 due to the existence of the adhesive, so that the service life of the filter bag is prolonged.
From the above, it can be seen that the dual-base fabric filter bag provided by the present application is provided with a functional base fabric layer 2 in addition to the conventional dust-facing surface fiber net layer 1, the supporting base fabric layer 3 and the clean gas surface fiber net layer 4 for filtering the flue gas to be filtered, the functional base fabric layer 2 comprises a first catalyst layer 21 and a second catalyst layer 23, and NO in the flue gas is filtered through the first catalyst layer 21 and the second catalyst layer 23 x Adsorption and catalytic degradation are carried out to remove NO in the flue gas at the same time when filtering particulate impurities in the flue gas x Reduction of NO x The dual functions of filtration and denitration are realized; no special denitration device is required to be configuredExpensive equipment cost and occupied cost of the denitration device can be saved; the reaction temperature of the adopted transition metal catalyst is consistent with the temperature of the filtering working condition, and a heat source is not required to be additionally provided for heating, so that the treatment cost is reduced; meanwhile, the heat contained in the flue gas generated by incineration can just provide reaction temperature for the transition metal catalyst, so that energy is saved, and cost is reduced.
Example 2
Referring to fig. 4, on the basis of embodiment 1, the filter bag further includes: the base fabric layer 22 is a grid structure, and catalyst filling blocks 221 are filled in the grids of the base fabric layer 22.
Specifically, the mesh size of the base scrim layer 22 is about 2cm by 2cm. The catalyst filling blocks 221 are filled in the grids, and the catalyst and the adhesive can be mixed to form a block structure matched with the size of the grids and adhered in the grids; or spraying the transition metal catalyst solution onto the basic base cloth layer 22 through an electrostatic spinning device, and performing high-temperature treatment to form the catalyst; other conventional filling methods are also possible, without limitation.
Specifically, the catalyst filling block 221 is formed by spraying a transition metal catalyst solution onto the base fabric layer 22 through an electrostatic spinning device and then performing high-temperature treatment, and may be performed as follows: and mixing the transition metal catalyst with a high polymer solvent, and then placing the mixture in a water bath kettle at 60 ℃ for stirring until the viscosity is 5-6 Pa.S, thus obtaining the transition metal catalyst solution. The polymer solvent is polyvinyl alcohol, polyvinylpyrrolidone, polyacrylonitrile, polystyrene and/or chitosan. The transition metal catalyst solution is transferred to an electrospinning device, and the filament-shaped transition metal catalyst solution is sprayed onto the base fabric layer 22 by using two electrospinning devices in a counter-spraying type electrospinning mode. Because the base fabric layer 22 is in a grid structure, the electrostatic spinning (i.e. the filiform transition metal catalyst solution) forms irregular spinning fillers in the grid, and then the base fabric layer 22 is treated at a high temperature of 350 ℃, at this time, the polymer solvent in the electrostatic spinning volatilizes, and the electrostatic spinning is contracted into irregular catalyst fillers 221 and is coated in the grid of the base fabric layer 22.
In this embodiment, the types of the catalyst and the transition metal catalysts in the first catalyst layer 21 and the second catalyst layer 23 may be the same or different, but are low-temperature transition metal catalysts for adsorbing and catalytically degrading NO in flue gas x Reduction of NO x Is arranged in the air.
In this embodiment, the grid of the base fabric layer 22 is filled with the catalyst filling blocks 221, so that on one hand, the space of the grid can be utilized to accommodate the catalyst, so as to improve the catalyst content of the unit volume of the base fabric layer 22 and further improve the denitration efficiency; on the other hand, the mesh is filled with the catalyst filling blocks 221, so that the surface of the base fabric layer 22 is smoother, connection with the first catalyst layer 21 and the second catalyst layer 23 is facilitated, and connection is firmer.
Further, the thickness of the functional base fabric layer 2 is smaller than the thickness of the support base fabric layer 3.
Specifically, the thickness of the functional base cloth layer 2 is smaller than that of the supporting base cloth layer 3, so that although the functional base cloth layer 2 is added in the application, the thickness and the weight of the whole filter cloth are not greatly increased, the strong supporting is not affected, and the denitration function can be increased.
Wherein the thickness of the functional base cloth layer 2 is 0.1-0.15 mm. The thickness of the supporting base cloth layer 3 is 0.4-0.5 mm. The thickness of the dust-facing surface fiber web layer 1 is 0.6-1.0 mm. The thickness of the net air surface fiber net layer 4 is 0.4-0.7 mm. The dust-facing surface fiber web layer 1 has a thicker thickness, so that the flue gas can be filtered better. The thickness of each layer can be seen that the thickness of the functional base cloth layer 2 is very thin compared with other three layers, and the thickness and the weight of the whole filter cloth are hardly affected.
Comparative example 1
A basic cloth filter bag differs from example 1 in that the filter bag is devoid of a functional basic cloth layer 2.
The filter bags of example 1, example 2 and comparative example 1 were used for flue gas filtration and denitration, and the denitration rate of flue gas was measured after denitration, and the results are shown in table 1 below.
Table 1 list of denitration rates for flue gas
As can be seen from the table, the double-base cloth filter bag can effectively remove NO in the flue gas x Reduction of NO x The dual functions of filtration and denitration are realized. In addition, the denitration can be realized only by using the double-base cloth filter bag, a special denitration device is not required to be configured, and the expensive equipment cost and the occupied cost of the denitration device can be saved; the reaction temperature of the adopted transition metal catalyst is consistent with the temperature of the filtering working condition, and a heat source is not required to be additionally provided for heating, so that the treatment cost is reduced; meanwhile, the heat contained in the flue gas generated by incineration can just provide reaction temperature for the transition metal catalyst, so that energy is saved, and cost is reduced.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the application (including the claims) is limited to these examples; the technical features of the above embodiments or in different embodiments may also be combined under the idea of the present application, the steps may be implemented in any order, and there are many other variations of the different aspects of the present application as described above, which are not provided in details for the sake of brevity.
The embodiments of the present application are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Accordingly, any omissions, modifications, equivalents, improvements and the like, which are within the spirit and principles of the application, are intended to be included within the scope of the present application.
Claims (9)
1. A double-base cloth filter bag, comprising: the dust-facing surface fiber web layer, the functional base cloth layer, the supporting base cloth layer and the clean gas surface fiber web layer are sequentially connected, and the dust-facing surface fiber web layer is arranged close to the smoke to be filtered;
the functional base fabric layer includes: the base cloth layer, the base cloth layer is close to the side of supporting the base cloth layer is equipped with first catalyst layer, the base cloth layer is close to the side of facing dust face web layer is equipped with the second catalyst layer.
2. The dual base filter bag of claim 1, wherein the base fabric layer is a mesh structure, and the meshes of the base fabric layer are filled with catalyst filler blocks.
3. The dual substrate filter bag of claim 1, wherein the first and second catalyst layers are the same thickness.
4. The dual base filter bag of claim 1, wherein the functional base layer has a thickness less than a thickness of the support base layer.
5. The dual base filter bag of claim 1, wherein the dust facing surface web layer has a thickness of 0.6 to 1.0mm.
6. The dual base filter bag of claim 1, wherein the functional base layer has a thickness of 0.1 to 0.15mm.
7. The dual base filter bag of claim 1, wherein the thickness of the support base layer is 0.4-0.5 mm.
8. The dual base filter bag of claim 1, wherein the clear air side web layer has a thickness of 0.4 to 0.7mm.
9. The dual substrate filter bag of claim 1, wherein the perimeter of the dust facing surface web layer and the perimeter of the clean air surface web layer are connected by a connecting line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222873057.5U CN219050665U (en) | 2022-10-28 | 2022-10-28 | Double-base cloth filter bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222873057.5U CN219050665U (en) | 2022-10-28 | 2022-10-28 | Double-base cloth filter bag |
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| Publication Number | Publication Date |
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| CN219050665U true CN219050665U (en) | 2023-05-23 |
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| CN202222873057.5U Active CN219050665U (en) | 2022-10-28 | 2022-10-28 | Double-base cloth filter bag |
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| CN (1) | CN219050665U (en) |
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- 2022-10-28 CN CN202222873057.5U patent/CN219050665U/en active Active
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