Preparation method of integrated catalytic oxidation filter material

Abstract

The invention discloses a preparation method of an integrated catalytic oxidation filter material. According to the preparation method, a filter material shell with a filtering function and a catalytic inner core with active components are prepared respectively, and then the integrated catalytic oxidation filter material is obtained in a combined mode. The method provided by the invention not only effectively solves the problem that the metal filter material and the active component are difficult to compound, realizes accurate control of uploading of the active component, but also can reduce contact between harmful substances in the flue gas and the active component, and prolongs the service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of industrial flue gas treatment, and particularly relates to a preparation method of an integrated catalytic oxidation filter material. Background Art

[0002] Industrial flue gases such as those from iron and steel sintering and electric arc furnace steelmaking contain a large amount of dust (PM), dioxins (PCDD / Fs), and carbon monoxide (CO), which need to be purified before being discharged into the atmosphere.

[0003] Traditionally, in industry, the dust removal and catalytic oxidation units are generally operated in series. This method has a long process flow, a large equipment scale, and high investment and operation and maintenance costs, which does not meet the current development needs of industrial energy conservation and carbon reduction.

[0004] Currently, PM is mainly captured and filtered by a dust collector, and the filtering element is a filter medium.

[0005] PCDD / Fs and CO are eliminated by catalytic oxidation, and the catalytic oxidation element is a catalytically active component.

[0006] If the functions of the filter medium and the catalytically active component can be combined, while using the filter medium to filter the dust in the flue gas, the catalytic oxidation ability of the active component can be used to eliminate PCDD / Fs and CO, then a composite filter medium with dual catalytic oxidation and filtering functions can be obtained.

[0007] In the prior art, when the catalytically active component is directly loaded on the filter medium, there are problems such as uneven dispersion of the active component, difficult control of the loading amount, and easy shedding. Summary of the Invention

[0008] The purpose of the present invention is to provide a preparation method of an integrated catalytic oxidation filter material, solve the problem of difficult compounding of the metal filter medium and the active component, and achieve precise control of the loading of the active component.

[0009] The technical solution of the present invention is: a preparation method of an integrated catalytic oxidation filter material, wherein the filter medium shell with a filtering function and the catalytic inner core of the active component are prepared separately, and then the integrated catalytic oxidation filter medium is obtained by a combination method; The preparation method of the filter medium shell with a filtering function is as follows: (1) Mix one or more of stainless steel powders labeled 201, 202, 304, 310s, 316, 321, 410, 420, and 430 with a particle size less than 300 mesh, one or more of aluminum sol, silica sol, low-melting glass powder, and hydroxypropyl methylcellulose binder, and deionized water in a mixer and stir at room temperature for 30 - 80 minutes to obtain a mixed material; wherein, the mass percentages of the stainless steel powder, binder, and deionized water are: 60 - 75%, 10 - 20%, and 5 - 20%; (2) Put the well-stirred mixed material into a press and press the mixed material into a metal felt board with a thickness between 0.5 - 3 mm under a pressure of 20 - 50 tons; (3) Put the metal felt board into a horizontal rolling machine and bend the metal felt material into a cylindrical shape with a diameter between 150 - 600 mm at a rolling speed of 2 - 5 m / min, and connect the edges of the felt material by welding to obtain a metal felt cylinder; (4) Put the metal felt cylinder into a kiln and calcine it at 800 - 1200 °C for 0.5 - 2 h; (5) Weld a metal sealing plate at the bottom of the calcined metal felt cylinder and weld a metal clamping block at the top; The preparation method of the catalytic inner core with catalytic oxidation function is as follows: (1) Prepare an oxide support: Mix one or more of Pt precursor, Pd precursor, Rh precursor, Ce precursor, Mo precursor, Zr precursor, and Sn precursor with deionized water and stir at room temperature for 20 - 40 min to obtain a homogeneous solution; Add one of the powders of MnO 2 , Al 2 O 3 and TiO 2 with a particle size less than 200 mesh into the above solution, stir at 80 - 130 °C until the water in the solution completely evaporates to obtain a solid; Crush the above solid into powder and put it into a muffle furnace, calcine at 400 - 600 °C for 3 - 6 h to obtain the prepared oxide support; (2) Prepare an active component slurry: Add the oxide support, one or more of aluminum sol, silica sol, and hydroxymethylcellulose to deionized water and stir at room temperature for 20 - 50 min. Put the mixed solution into a ball mill tank and ball mill at 300 - 700 r / min for 0.5 - 4 h; Add one or more of Pt precursor, Pd precursor, and Rh precursor to the ball-milled solution to obtain the prepared active component slurry; (3)Preparation of the catalytic oxidation active core: Immerse the metal mesh cylinder in the prepared active component solution for 5 - 30 s, then place it in an oven and dry at 90 - 120 °C for 20 - 60 min. After drying, put it into a muffle furnace and calcine at 400 - 600 °C for 3 - 6 h; weld a metal clamping block on the top of the calcined metal mesh cylinder; The combination method of the filter material housing and the catalytic core is as follows: (1)Select an upper end cap with a suitable size according to the diameters of the catalytic core and the filter material housing; (2)Connect and fix the catalytic core and the filter material housing to the upper end cap through the top clamping blocks respectively, and put a polytetrafluoroethylene sealing ring on the connection between the upper end cap and the filter material housing to obtain an integrated catalytic oxidation filter material.

[0010] According to the embodiments of the present invention, the active component is one or more of Pt - Pd - Rh - Mo - Sn - Ce - Zr / TiO 2 、Pt - Pd - Rh - Mo - Sn - Ce - Zr / Al 2 O 3 、Pt - Pd - Rh - Mo - Sn - Ce - Zr / MnO 2 ; the loading amount of the active component is between 30 - 100 g / L; wherein the mass fractions of Pt, Pd, Rh, Mo, Sn, Ce, and Zr elements relative to the carrier are between 0.1 - 1.5%, 0 - 1.5%, 0 - 0.25%, 0.5 - 5%, 0.5 - 15%, 0 - 10%, and 0 - 15%.

[0011] According to the embodiments of the present invention, the Pt precursor, Pd precursor, Rh precursor, Ce precursor, Mo precursor, Zr precursor, and Sn precursor are water - soluble compounds, including platinum nitrate, palladium nitrate, rhodium nitrate, cerium nitrate, ammonium molybdate, zirconium acetate, and tin acetate.

[0012] According to the embodiments of the present invention, the wall thickness of the filter material housing is between 0.5 - 3 mm, the diameter is between 150 - 600 mm, the height is between 600 - 3000 mm, the porosity is between 75 - 90%, and the average pore diameter on the surface of the filter material is between 1 - 5 μm.

[0013] According to the embodiments of the present invention, the wall thickness of the metal mesh cylinder is between 0.2 - 3 mm, the diameter is between 100 - 450 mm, the height is between 400 - 2800 mm, and the mesh number is between 150 - 600 meshes.

[0014] The beneficial technical effects of the present invention are: (1) The integrated catalytic oxidation filter material uses an external filter material to filter out dust and solid impurities in the flue gas. The purified flue gas then reacts with the catalytic inner core in the filter material to eliminate PCDD / Fs and CO in the flue gas. This method can not only eliminate three pollutants simultaneously, but also effectively utilize the temperature rise of the CO oxidation reaction to enhance the removal effect of PCDD / Fs, achieving the efficient co-removal of these two pollutants. (2) The method of the present invention not only effectively solves the problem of difficult compounding of metal filter materials and active components, realizes the precise control of the loading of active components, but also reduces the contact between harmful substances in the flue gas and active components, and prolongs the service life. Description of the Drawings

[0015] Figure 1 It is a structural diagram of the integrated catalytic oxidation filter material.

[0016] In the figure: 1 - upper end cover; 2 - outer shell; 3 - catalytic inner core. Detailed Embodiments

[0017] The following further illustrates the present invention with reference to embodiments, but the protection scope of the present invention is not limited thereto.

[0018] The integrated catalytic oxidation filter material includes a high-temperature resistant filter material outer shell 2, a catalytic inner core 3 with catalytic oxidation function, and an upper end cover 1. The outer shell 2 and the catalytic inner core 3 are respectively fixedly connected to the upper end cover 1. The outer shell 2 is a filter cartridge made of metal fibers. A metal clamping block is provided on the upper part of the filter cartridge, and the metal clamping block is fixedly connected to the upper end cover 1. The catalytic inner core 3 is a metal mesh cylinder loaded with active components. A metal clamping block is provided on the upper part of the metal mesh cylinder, and the metal clamping block is fixedly connected to the upper end cover 1. The active components are one or several of Pt-Pd-Rh-Mo-Sn-Ce-Zr / TiO 2 、Pt-Pd-Rh-Mo-Sn-Ce-Zr / Al 2 O 3 、Pt-Pd-Rh-Mo-Sn-Ce-Zr / MnO 2 ; The loading amount of the active components is between 30 and 100 g / L. The mass fractions of Pt, Pd, Rh, Mo, Sn, Ce, and Zr elements relative to the carrier are between 0.1% and 1.5%, 0% and 1.5%, 0% and 0.25%, 0.5% and 5%, 0.5% and 15%, 0% and 10%, and 0% and 15% respectively. The upper end cover 1 is provided with two layers of clamping rings inside and outside, which are respectively connected to the metal clamping blocks of the outer shell 2 and the catalytic inner core 3. The filter cartridge and the catalytic inner core 3 are prepared separately and then combined to obtain the integrated catalytic filter material.

[0019] The preparation method of the filter material outer shell 2 with filtering function is as follows: (1) Mix one or more of the stainless steel powders labeled 201, 202, 304, 310s, 316, 321, 410, 420, and 430 with a particle size less than 300 mesh, one or more of aluminum sol, silica sol, low melting point glass powder, and hydroxypropyl methylcellulose binder, and deionized water in a mixer and stir at room temperature for 30 - 80 minutes to obtain a mixed material; wherein, the mass percentages of the stainless steel powder, binder, and deionized water are: 60 - 75%, 10 - 20%, and 5 - 20%; (2) Put the uniformly stirred mixed material into a press and press the mixed material into a metal felt board with a thickness between 0.5 - 3 mm under a pressure of 20 - 50 tons; (3) Put the metal felt board into a horizontal rolling machine and bend the metal felt material into a cylindrical shape with a diameter between 150 - 600 mm at a rolling speed of 2 - 5 m / min, and connect the edges of the felt material by welding to obtain a metal felt cylinder; (4) Put the metal felt cylinder into a kiln and calcine it at 800 - 1200 °C for 0.5 - 2 h; (5) Weld a metal sealing plate at the bottom of the calcined metal felt cylinder for sealing, and weld a metal clamping block at the top for connecting with the upper end cover.

[0020] The preparation method of the catalytic inner core 2 is as follows: (1) Prepare an oxide carrier: Mix one or more of Pt precursor, Pd precursor, Rh precursor, Ce precursor, Mo precursor, Zr precursor, and Sn precursor with deionized water and stir at room temperature for 20 - 40 min to obtain a uniform solution; Add one of the powders of MnO 2 , Al 2 O 3 and TiO 2 with a particle size less than 200 mesh to the above solution, stir at 80 - 130 °C until the water in the solution is completely evaporated to obtain a solid; Crush the above solid into powder and put it into a muffle furnace, calcine at 400 - 600 °C for 3 - 6 h to obtain the prepared oxide carrier; (2) Prepare an active component slurry: Add the oxide carrier, one or more of aluminum sol, silica sol, and hydroxymethylcellulose to deionized water and stir at room temperature for 20 - 50 min. Put the mixed solution into a ball mill tank and ball mill at 300 - 700 r / min for 0.5 - 4 h; Add one or more of Pt precursor, Pd precursor, and Rh precursor to the ball milled solution to obtain the prepared active component slurry; (3) Preparation of the catalytic oxidation active core: Immerse the metal mesh cylinder in the prepared active component solution for 5 - 30 s, put it into an oven and dry it at 90 - 120 °C for 20 - 60 min, and then put the dried one into a muffle furnace and calcine it at 400 - 600 °C for 3 - 6 h; weld a metal clamping block on the top of the calcined metal mesh cylinder for connection with the upper end cover.

[0021] The Pt precursor, Pd precursor, Rh precursor, Ce precursor, Mo precursor, Zr precursor, and Sn precursor are water-soluble compounds, including platinum nitrate, palladium nitrate, rhodium nitrate, cerium nitrate, ammonium molybdate, zirconium acetate, and tin acetate.

[0022] The wall thickness of the filter cartridge is between 0.5 - 3 mm, the diameter is between 150 - 600 mm, the height is between 600 - 3000 mm, the porosity is between 75 - 90%, and the average pore diameter on the surface of the filter media is between 1 - 5 μm.

[0023] The wall thickness of the metal mesh cylinder is between 0.2 - 3 mm, the diameter is between 100 - 450 mm, the height is between 400 - 2800 mm, and the mesh number is between 150 - 600 meshes.

[0024] The preparation method of the integrated catalytic oxidation filter media is as follows: (1) Select an upper end cover 1 with a suitable size according to the diameters of the catalytic core 3 and the filter media housing 2; (2) Connect and fix the catalytic core 3 and the housing 2 to the upper end cover 1 respectively through the top clamping blocks, and put a polytetrafluoroethylene sealing ring on the connection between the upper end cover 1 and the housing 2 to obtain the integrated catalytic oxidation filter media.

[0025] Example 1.

[0026] The preparation method of the integrated catalytic oxidation filter material is as follows.

[0027] Step 1. Preparation of the metal filter media housing 2.

[0028] First, load 5 kg of 304s metal powder with a particle size less than 200 meshes, 1.5 kg of neutral silica sol, 1.5 kg of low melting point glass powder, and 0.5 kg of deionized water into a mixer, and stir at room temperature for 40 min to obtain a uniformly mixed dry material.

[0029] Put the dry material into a press and press it into a metal felt board with a thickness of about 1.2 mm and a length of about 800 mm under a pressure of 30 tons.

[0030] Put the metal felt sheet into a horizontal plate rolling machine, and bend the metal felt material into a cylinder with a diameter of about 200 mm at a plate rolling speed of 3.5 m / min. Connect the two sides of the metal felt sheet by laser welding to obtain a metal felt cylinder.

[0031] Put the metal felt cylinder into a kiln and calcine it at 1000 °C for 1.2 h. After the metal felt cylinder cools, laser weld a circular metal sealing plate at the bottom of the felt cylinder. The metal sealing plate is made of 304s, with a thickness of 2.5 mm and a diameter of 405 mm. Laser weld 4 metal blocks at the top of the felt cylinder. The metal blocks are made of 304s and have a height of 25 mm.

[0032] Step 2. Preparation of the active component slurry.

[0033] Add 2.325 kg of cerium nitrate hexahydrate, 2.666 kg of zirconium acetate, and 6.470 kg of ammonium molybdate tetrahydrate to 15 L of deionized water, and stir for 30 min at room temperature to obtain a homogeneous solution. Add 10 kg of Al 2 O 3 powder to the above solution, and stir at 120 °C for 36 hours until the water in the solution completely evaporates to obtain a solid.

[0034] The specific surface area of the Al 2 O 3 powder is greater than 180 m 2 / g, the purity is not less than 99.9%, and the particle size is 325 mesh.

[0035] Crush the above solid and place it in a ball milling tank, and ball mill at a rotation speed of 400 r / min for 0.5 h to obtain a powder.

[0036] Put the above powder into a muffle furnace and calcine it at 550 °C for 4.5 h to obtain a CeO 2 -ZrO 2 -MoO 3 -Al 2 O 3 oxide support. The mass fractions of Ce, Zr, and Mo elements relative to Al 2 O 3 are 7.5%, 7.5%, and 5% respectively.

[0037] Put 8 kg of the above oxide support, 2 kg of aluminum sol (Al 2 O 3 with a mass fraction of 20%, a pH of 4 - 5, and a D90 of 10 nm) and 30 kg of deionized water into a ball milling tank, and ball mill at a rotation speed of 500 r / min for 2 h to obtain a homogeneous slurry.

[0038] Take the above 30 kg of the above slurry, and add 51.7 g of platinum nitrate and 32.6 g of palladium nitrate thereto. Stir well at room temperature for 30 min to obtain an active component slurry. The mass fractions of Pt and Pd elements relative to CeO 2 -ZrO 2 -MoO 3 -Al 2 O 3 oxide carrier are 0.52% and 0.25% respectively.

[0039] Step 3. Preparation of the catalytic active core.

[0040] Immerse a metal mesh cylinder with a thickness of 1.5 mm, a diameter of 120 mm, and a length of 400 mm in the active component slurry. Lift the metal mesh cylinder after 15 s. Transfer it to an oven when no slurry drips from the cylinder.

[0041] After drying at 100 °C in the oven for 45 min, transfer it to a muffle furnace and calcine at 500 °C for 4 h.

[0042] Weld 4 metal blocks on the top of the calcined metal mesh cylinder. The material of the metal blocks is 304s and the height is 25 mm.

[0043] Step 4. Preparation of the integrated catalytic oxidation filter material.

[0044] Select a circular metal end cap with an outer diameter of 165 mm and an inner diameter of 95 mm. Weld a clamping groove at a suitable position on the end cap, and connect and fix it successively with the catalytic active core prepared in Step 3 and the metal blocks on the top of the metal filter housing prepared in Step 1.

[0045] Put on a polytetrafluoroethylene sealing ring with an inner diameter of 168 mm and an outer diameter of 170 mm at the connection between the upper end cap and the filter housing to obtain the integrated catalytic oxidation filter material.

[0046] Example 2.

[0047] Steps 1, 3, and 4 of this example are the same as those of Example 1, and Step 2 is different. Specifically,

[0048] Step 1. The same as Example 1.

[0049] Step 2. Preparation of the active component slurry.

[0050] Add 9.710 kg of ammonium molybdate tetrahydrate to 10 L of deionized water, and stir at room temperature for 30 min to obtain a uniform solution. Add 10 kg of TiO 2 powder thereto, and stir at 120 °C for 24 hours until the water in the solution is completely evaporated to obtain a solid.

[0051] The described TiO 2 powder has a rutile crystal form, a specific surface area greater than 70 m 2 / g, a purity not less than 95%, a particle size of 325 mesh, and a pH between 6 and 8. The above solid is crushed and placed in a ball mill jar, and ball milled at a speed of 300 r / min for 0.5 h to obtain a powder.

[0052] The above powder is transferred to a muffle furnace and calcined at 450 °C for 3 h to obtain MoO 3 -TiO 2 oxide support. The mass fraction of Mo element relative to Al 2 O 3 is 7.5% respectively. 8 kg of the above oxide support, 3 kg of neutral silica sol (SiO 2 with a mass fraction of 25%, a pH of 4 - 5, and a particle size of 10 - 20 nm) and 30 kg of deionized water are placed in a ball mill jar and ball milled at a speed of 500 r / min for 2 h to obtain a uniform slurry.

[0053] Take 30 kg of the above slurry, and add 51.7 g of platinum nitrate and 120.3 g of rhodium nitrate solution (Rh mass fraction is 10%) into it, and stir well at room temperature for 30 min to obtain an active component slurry. The mass fractions of Pt and Rh elements relative to MoO 3 -TiO 2 oxide support are 0.52% and 0.15% respectively.

[0054] Step 3. The same as in Example 1.

[0055] Step 4. The same as in Example 1.

[0056] The samples prepared in Example 1 and Example 2 are tested for their performance according to the following procedures.

[0057] An active component shedding rate test is carried out on the samples prepared in Example 1 and Example 2 using a self - made dust collector test platform.

[0058] Put 1 sample into the dust collector test platform, manually open the pulse valve to blow the sample, the blowing pressure is 0.3 - 0.5 MPa, and continuously blow 100 times. The greater the mass of the sample after blowing and the smaller the mass of the shed active component, the higher the loading firmness.

[0059] Active component shedding rate=(m 0 -m 1 ) / m 0 ×100% In the formula, m 0 is the mass of the sample before blowing, and m 1 is the mass of the sample after blowing.

[0060] The test results of the shedding rate of the active components of the samples are shown in Table 1.

[0061] Table 1 Test results of the shedding rate of the active components of the samples.

[0062] .

[0063] The filtration performance of the samples was tested using a self-made dust collector test platform. The test dust was a dust standard sample (the D50 of coal fly ash was 7.5 μm).

[0064] Dust filtration efficiency = (D 0 - D 1 ) / D 0 × 100% In the formula, D 0 is the dust inlet concentration, and D 1 is the dust outlet concentration.

[0065] The test pieces for filtration performance are shown in Table 2.

[0066] Table 2 Test conditions for the filtration performance of the samples.

[0067] .

[0068] The test results of the filtration performance of the samples are shown in Table 3.

[0069] Table 3 Test results of the filtration performance of the samples.

[0070] .

[0071] The CO and PCDD / Fs removal performance of the samples prepared in Examples 1 and 2 was tested using a self-made dust collector test platform. Chlorobenzene (C 6 H 5 Cl) was used as a substitute for PCDD / Fs.

[0072] Two samples were placed in the dust collector test platform. After CO, C 6 H 5 Cl, O 2 and N 2 were mixed evenly in a mixer, they were quickly heated to the reaction temperature in a pipeline heater and then introduced into the dust collector to react with the samples.

[0073] The reaction test conditions were: reaction wind speed 1 m / min, reaction temperature 220 - 280 °C, CO concentration 4000 ppm, chlorobenzene concentration 200 ppm, O 2 concentration 20%, N 2 as the balance gas. The inlet and outlet CO and C 6 H 5The Cl concentration was measured by an MKS gas analyzer.

[0074] CO removal efficiency = (C 0 - C 1 ) / C 0 × 100% Wherein, C 0 is the CO inlet concentration, and C 1 is the CO outlet concentration.

[0075] C 6 H 5 Cl removal efficiency = (N 0 - N 1 ) / N 0 × 100% Wherein, N 0 is the C 6 H 5 Cl inlet concentration, and N 1 is the C 6 H 5 Cl outlet concentration.

[0076] The test results of the CO and C 6 H 5 Cl removal performance of the samples are shown in Table 4.

[0077] Table 4 Test results of the CO and C 6 H 5 Cl removal performance of the samples.

[0078] .

[0079] It can be seen from the results in Table 1 that the active component fastness of the samples in Examples 1 and 2 is good and can be applied to the operating conditions of the dust collector.

[0080] It can be seen from the results in Table 2 and Table 3 that through the actual tests of the dust removal efficiency and CO removal rate of the samples in Examples 1 and 2 and the test of the removal rate of the PCDD / Fs analog C 6 H 5 Cl, the prepared integrated catalytic oxidation filter material has excellent dust removal efficiency and CO and PCDD / Fs removal performance. At a filtration air velocity of 1 m / min, the dust removal efficiency is as high as over 99.98%, the CO removal efficiency can reach over 80% at 280 °C, and the PCDD / Fs removal efficiency can reach over 80% at 220 °C, showing good dust filtration and dual catalytic oxidation functions.

Claims

1. A method for preparing an integrated catalytic oxidation filter material, characterized in that The preparation method prepares a filter material shell with a filtering function and a catalytic inner core of an active component separately, and then combines them to obtain an integrated catalytic oxidation filter material; The preparation method of the filter material housing with filtering function is as follows: (1) Mix one or more of 201, 202, 304, 310s, 316, 321, 410, 420 and 430 stainless steel powders with a particle size of less than 300 meshes, one or more of aluminum sol, silica sol, low melting point glass powder, hydroxypropyl methylcellulose binder, and deionized water, and stir in a mixer at room temperature for 30 to 80 minutes to obtain a mixture; wherein the mass percentages of the stainless steel powder, the binder and the deionized water are: 60 to 75%, 10 to 20% and 5 to 20%; (2) placing the uniformly stirred mixture into a press and pressing the mixture into a metal felt plate with a thickness of 0.5 to 3 mm at a pressure of 20 to 50 tons; (3) placing the metal felt sheet into a horizontal plate rolling machine, bending the metal felt sheet into a cylindrical shape with a diameter of 150 to 600 mm at a rolling speed of 2 to 5 m / min, and connecting the edges of the felt sheet by welding to obtain a metal felt tube; (4) Place the metal felt tube into a kiln and calcine it at 800-1200°C for 0.5-2 h; (5) Welding a metal sealing plate at the bottom of the calcined metal felt tube and welding a metal clamping block at the top; The preparation method of the catalytic inner core having catalytic oxidation function is as follows: (1) Preparation of oxide carrier: one or more of Pt precursor, Pd precursor, Rh precursor, Ce precursor, Mo precursor, Zr precursor and Sn precursor are mixed with deionized water, and stirred at room temperature for 20-40 min to obtain a uniform solution; one of MnO2, Al2O3 and TiO2 powders with a particle size less than 200 mesh is added to the above solution, and stirred at 80-130°C until the water in the solution is completely evaporated to obtain a solid; the above solid is crushed into powder and placed in a muffle furnace, and calcined at 400-600°C for 3-6 h to obtain a prepared oxide carrier; (2) Prepare active component slurry: Add one or more of the oxide carrier, aluminum sol, silica sol and hydroxymethyl cellulose to deionized water and stir at room temperature for 20 to 50 min. Put the mixed solution into a ball mill and mill it at 300 to 700 r / min for 0.5 to 4 h; add one or more of the Pt precursor, Pd precursor and Rh precursor to the ball milled solution to obtain the prepared active component slurry; (3) Preparation of catalytic oxidation active inner core: immerse the metal mesh cylinder in the prepared active component solution for 5-30 seconds, place it in an oven and dry it at 90-120°C for 20-60 minutes, and after drying, place it in a muffle furnace and calcine it at 400-600°C for 3-6 hours; weld a metal block on the top of the calcined metal mesh cylinder; The combination of the filter material shell and the catalytic inner core is as follows: (1) Select the upper end cover of appropriate size according to the diameter of the catalytic core and the filter shell; (2) The catalytic inner core and the filter material outer shell are respectively connected and fixed to the upper end cover through the top clamp block, and a polytetrafluoroethylene sealing ring is put on the connection between the upper end cover and the filter material outer shell to obtain an integrated catalytic oxidation filter material.

2. The method for preparing the integrated catalytic oxidation filter material according to claim 1, characterized in that The active component is one or more of Pt-Pd-Rh-Mo-Sn-Ce-Zr / TiO2, Pt-Pd-Rh-Mo-Sn-Ce-Zr / Al2O3, and Pt-Pd-Rh-Mo-Sn-Ce-Zr / MnO2; the loading amount of the active component is between 30 and 100 g / L; the mass fraction of Pt, Pd, Rh, Mo, Sn, Ce, and Zr elements relative to the carrier is between 0.1 and 1.5%, 0 and 1.5%, 0 and 0.25%, 0.5 and 5%, 0.5 and 15%, 0 and 10%, and 0 and 15%.

3. The method for preparing the integrated catalytic oxidation filter material according to claim 1, characterized in that The Pt precursor, Pd precursor, Rh precursor, Ce precursor, Mo precursor, Zr precursor and Sn precursor are water-soluble compounds, including platinum nitrate, palladium nitrate, rhodium nitrate, cerium nitrate, ammonium molybdate, zirconium acetate and tin acetate.

4. The method for preparing the integrated catalytic oxidation filter material according to claim 1, characterized in that The filter material shell has a wall thickness of 0.5-3 mm, a diameter of 150-600 mm, a height of 600-3000 mm, a porosity of 75-90%, and an average pore size on the filter material surface of 1-5 μm.

5. The method for preparing the integrated catalytic oxidation filter material according to claim 1, characterized in that The metal mesh tube has a wall thickness of 0.2-3 mm, a diameter of 100-450 mm, a height of 400-2800 mm, and a mesh number of 150-600.

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