Integrated wrinkled dust removal and denitration filter material for filter cartridge

Abstract

The utility model discloses an integrated wrinkled dust removal and denitration filter material for a filter cartridge, which is characterized in that a single-layer denitration filter material film is tidied and then is subjected to pleating treatment to obtain the wrinkled denitration filter material with the single-layer film, and the integrated wrinkled dust removal and denitration filter material can be used as a catalytic filter cartridge material. The integrated wrinkled dust removal and denitration filter material for the filter cartridge comprises a catalytic filter material layer and a film coating layer, the catalytic filter material layer takes base cloth as a supporting layer, and a fiber material is reinforced on the base cloth to prepare a fiber felt loaded with a denitration catalyst; the catalytic filter material layer takes the base cloth as a boundary, and two surfaces of the catalytic filter material layer are respectively a dust facing surface layer and a gas purifying surface layer; the air purification surface layer is subjected to post-treatment by using a stiff coating process; the film coating layer is a polytetrafluoroethylene microporous film and is attached to the surface of the dust facing surface layer through a hot-pressing film coating process; the whole filter material is pleated to form a plurality of folds.

Description

TECHNICAL FIELD

[0001] The utility model belongs to filter cartridge filter material technical field, especially point to a filter cartridge is with integral type fold dust removal denitration filter material. BACKGROUND

[0002] Traditional denitration or dust removal technology can only remove a single pollutant in a targeted manner. When mixed flue gas needs to be treated, the equipment for treating mixed flue gas becomes complex in structure due to the combination of denitration and dust removal technology, and the cost is relatively high. If the denitration function is given to the filter material on the basis of its original dust removal function, so as to remove both dust particle pollutants and nitrogen oxides in industrial flue gas, the existing flue gas treatment system will be greatly simplified, the occupied space and capital investment of denitration equipment will be saved, and the treatment cost of industrial flue gas will be reduced, so the research on the integrated dust removal and denitration functional filter material is of great practical significance.

[0003] Patent CN217746199U discloses a composite fold filter bag composed of an outer dust removal layer and an inner fold catalytic layer; and patent CN204073848U discloses a filter cartridge structure which is also provided with inner and outer double layers, the inner layer is a metal mesh structure, the outer layer is a dust removal fold filter material, and a denitration catalyst is filled in the cavity formed between the inner and outer layers to form a denitration and dust removal filter cartridge. Both of the above have the disadvantages of complex and cumbersome process, high cost, and large filtration resistance. In addition, the existing catalytic filter material more or less has the problems of small load, low denitration efficiency, and complex process structure. Under actual working conditions, it faces greater wind speed, complex flue gas environment, and unstable temperature, and the flue gas stays in the fiber layer of the filter bag for a short time, which easily causes insufficient reaction time of the catalyst, seriously affecting the catalysis and dust removal effect of the filter bag, and further reducing the catalytic denitration efficiency of the denitration catalytic filter material. UTILITY MODEL CONTENTS

[0004] The utility model discloses a filter cartridge is with integral type fold dust removal denitration filter material, solves the problem in the prior art, and the single-layer denitration filter material is arranged after film finishing and is handled to fold, obtains the fold denitration filter material of single-layer film, and can be used as catalytic filter cartridge material.

[0005] In order to achieve the above purpose, the solution of the utility model is as follows:

[0006] An integrated pleated dust removal and denitration filter material for filter cartridges, comprising a catalytic filter material layer and a film coating layer; the catalytic filter material layer is made of a base cloth as a support layer and reinforced with fiber materials to load a denitration catalyst on the base cloth to form a fiber felt; the catalytic filter material layer is bounded by the base cloth, and two surfaces of the base cloth are respectively a dust-approaching surface layer and a clean gas surface layer; the clean gas surface layer is post-processed by a stiffening coating process; the film coating layer is a polytetrafluoroethylene microporous film and is attached to the surface of the dust-approaching surface layer by a hot-pressing film coating process; and the overall filter material is pleated to form a plurality of pleats.

[0007] The fiber felt takes at least one of polyphenylene sulfide, polytetrafluoroethylene, polyimide and aramid as a fiber material and is processed by an opening, mixing, carding and laying process, is reinforced by needle punching or water jetting with the base cloth as a support layer to obtain the fiber felt, and then is processed by an impregnation, coating or in-situ synthesis process to load the denitration catalyst on the fiber felt to prepare the catalytic filter material layer.

[0008] The integrated pleated dust removal and denitration filter material has a thickness of 1-3 mm, an air permeability of 20-70 L / (dm 2 *min), a grammage of 300-700 g / m 2 , and a pleat depth of 12-55 mm after pleating.

[0009] After the above technical scheme is adopted, the utility model has the following technical effects:

[0010] (1) The clean gas surface layer is post-processed by a stiffening coating process, so that the filter material has a certain stiffness;

[0011] (2) The overall filter material can greatly increase the filtering area after pleating, effectively prolongs the contact time of nitrogen oxides and the catalyst, and thus increases the catalytic denitration efficiency per unit area, so that the filtering and denitration are more sufficient and efficient;

[0012] (3) The materials and processes involved in the utility model are all prior art, and no additional research and development cost is needed;

[0013] (4) Compared with the conventional filter cartridge filter material which mostly adopts a double-layer structure or a catalyst separately filled to realize denitration and dust removal, the filter material of the utility model has only a single layer, has a simpler structure, uses less material, has a short process flow, and does not need complex assembly, so that the cost and volume can be reduced, and the filter material has the functions of dust removal and denitration, and realizes integrated dust removal and denitration. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of the layer structure of a specific embodiment of the utility model;

[0015] Figure 2 is a schematic diagram of a product of a specific embodiment of the utility model.

[0016] BRIEF DESCRIPTION OF DRAWINGS

[0017] 1-catalytic filter material layer; 11-base cloth; 12-dust-facing surface layer; 13-clean gas surface layer; 2-coated layer. DETAILED DESCRIPTION

[0018] In order to further explain the technical scheme of the utility model, the utility model will be described in detail below through specific embodiments.

[0019] Reference Figure 1 As shown in the figure, the utility model discloses a kind of integrated wrinkle dust removal denitration filter material for filter cartridge, including catalytic filter material layer 1 and coated layer 2;

[0020] Catalytic filter material layer 1 is supported layer with base cloth 11 and is reinforced with fiber material on it to obtain fiber felt loaded with denitration catalyst;Catalytic filter material layer 1 is with base cloth 11 as boundary, and its two sides are dust-facing surface layer 12 and clean gas surface layer 13 respectively;Clean gas surface layer 13 is post-processed using stiff coating process;

[0021] Coated layer 2 is polytetrafluoroethylene microporous membrane, and is attached to the surface of dust-facing surface layer 12 by hot-pressing coating process;

[0022] The whole filter material is pleated to form a plurality of pleats.

[0023] Through the above scheme, the clean gas surface layer 13 of the utility model is post-processed using stiff coating process, so that the filter material has a certain stiffness;The whole filter material can greatly increase the filtration area after pleating, effectively prolong the contact time of nitrogen oxides and catalyst, thereby increasing the catalytic denitration efficiency per unit area, ensuring more sufficient and efficient filtration and denitration;The materials and processes involved in the utility model are prior art, without additional R&D costs;Compared with the conventional filter cartridge filter material, which mostly adopts double-layer structure or catalyst separate filling to realize denitration and dust removal, the filter material of the utility model has only single layer, simpler structure, less material, shorter process flow, without complex assembly, which can reduce cost and size, and at the same time has dust removal and denitration functions, realizing integrated dust removal and denitration.

[0024] The specific embodiments of the utility model are shown below.

[0025] The fiber felt takes at least one of polyphenylene sulfide, polytetrafluoroethylene, polyimide and aramid as a fiber material, and is obtained through existing processes such as opening, mixing, carding, laying, etc., and is reinforced by needle punching or water punching with the base cloth 11 as a support layer, and then the denitration catalyst is loaded on the fiber felt through existing processes such as impregnation, coating or in-situ synthesis, to prepare the catalytic filter material layer 1. It should be noted that when the fiber material is mixed, the various fibers are simply mixed together, and no new material is produced.

[0026] The catalyst loaded on the fiber felt can be a common denitration catalyst, such as a manganese-based and vanadium-based catalyst.

[0027] The thickness of the integrated pleated dust removal and denitration filter material is 1-3 mm, the air permeability is 20-70 L / (dm 2 *min), the grammage is 300-700 g / m 2 , and the pleat depth after pleating is 12-55 mm. Referring to Figure 2 , the filter material of the utility model can be used for filter cartridges of different specifications with an outer diameter of 160 mm and a pleat number of 25-350.

[0028] The above embodiments and drawings do not limit the product form and style of the utility model, and any appropriate changes or modifications made by ordinary skilled persons in the art shall be considered as not departing from the patent scope of the utility model.

Claims

1. An integrated pleated dust removal and denitration filter material for filter cartridges, characterized in that: it comprises a catalytic filter material layer and a film coating layer; the catalytic filter material layer is made of a fiber felt loaded with a denitration catalyst, with a base cloth as a support layer and reinforced fiber material thereon; the catalytic filter material layer is bounded by the base cloth, with a dust- facing layer and a clean gas-facing layer on the two sides respectively; the clean gas-facing layer is post-processed using a stiff coating process; the film coating layer is a polytetrafluoroethylene microporous film, and is attached to the surface of the dust-facing layer through a hot-pressing film coating process; and the overall filter material is pleated to form a plurality of pleats.

2. The integrated pleated dust removal and denitration filter material for filter cartridges according to claim 1, characterized in that: the fiber felt takes one of polyphenylene sulfide, polytetrafluoroethylene, polyimide and aramid as the fiber material, and is processed through an opening, mixing, carding and laying process, with the base cloth as a support layer, and then is reinforced through needle punching or water jetting to obtain the fiber felt, and then the denitration catalyst is loaded on the fiber felt through an impregnation, coating or in-situ synthesis process to prepare the catalytic filter material layer.

3. The integrated pleated dust removal and denitration filter material for filter cartridges according to claim 1, characterized in that: ​ ​ ​ ​ ​ The thickness of the integrated dust-removing and denitration filter material is 1-3 mm, the air permeability is 20-70 L / (dm 2 min), the weight is 300-700 g / m 2 , and the pleat depth is 12-55 mm after pleating.

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