Preparation method of dedusting and denitration catalytic membrane material

A catalytic membrane, denitration technology, applied in chemical instruments and methods, separation methods, physical/chemical process catalysts, etc., can solve problems such as high cost, complex process, waste of space, etc., and achieve the effect of improving filtration capacity

Pending Publication Date: 2022-04-08
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem that the existing integrated technology of dust removal and denitrification is not truly integrated, and has high cost, waste of space and complicated process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing a dust removal and denitrification catalytic membrane material, comprising the following steps:

[0034] (1) 50% manganese nitrate solution that is 90 parts by mass is mixed with cerium nitrate hexahydrate crystals that are 40 parts by mass, and stirred until the cerium nitrate hexahydrate crystals are completely dissolved, and then 500 parts by mass of titanium is added to the mixed solution. For white powder, use an electric mixer to stir for 40 minutes to make them fully mixed evenly and make mud; then put the mud in a plastic seal, put it in a constant temperature and humidity (20°C, 60% RH) condition for 24 hours, and then put it into the muffle furnace Carry out high-temperature (500 ℃) calcination for 5 hours in the middle, grind the obtained solid, control the average particle size of the powder to be 2 μm, and make Mn-Ce / Ti catalyst powder;

[0035] (2) At 40°C, sequentially add 80 parts by mass of ammonium metatungstate powder and 80 par...

Embodiment 2

[0044] A method for preparing a dust removal and denitrification catalytic membrane material, comprising the following steps:

[0045] (1) 50% manganese nitrate solution that is 100 parts by mass is mixed with cerium nitrate hexahydrate crystals that are 45 parts by mass, and stirred until the cerium nitrate hexahydrate crystals are completely dissolved, and then 550 parts by mass of titanium is added to the mixed solution. For white powder, use an electric mixer to stir for 50 minutes to make them fully mixed evenly to make mud; then put the mud into a plastic seal, put it in a constant temperature and humidity (23°C, 63% RH) condition for 24 hours, and then put it into the muffle furnace Carry out high-temperature (550 ℃) calcining for 6 hours in the middle, grind the obtained solid, control the average particle size of the powder to be 2 μm, and make Mn-Ce / Ti catalyst powder;

[0046] (2) Under the condition of 50°C, sequentially add 90 parts by mass of ammonium metatungsta...

Embodiment 3

[0055] A method for preparing a dust removal and denitrification catalytic membrane material, comprising the following steps:

[0056] (1) 50% manganese nitrate solution that is 110 parts by mass is mixed with cerium nitrate hexahydrate crystals that are 50 parts by mass, and stirred until the cerium nitrate hexahydrate crystals are completely dissolved, then 600 parts by mass of titanium is added to the mixed solution For white powder, use an electric mixer to stir for 60 minutes to make them fully mixed evenly and make mud; then put the mud into a plastic seal, put it in a constant temperature and humidity (25°C, 65% RH) condition for 24 hours, and then put it into the muffle furnace Carry out high-temperature (600°C) calcination for 7 hours in a medium temperature, grind the obtained solid, control the average particle size of the powder to 2 μm, and obtain Mn-Ce / Ti catalyst powder;

[0057] (2) At 60°C, sequentially add 100 parts by mass of ammonium metatungstate powder an...

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Abstract

The invention discloses a preparation method of a dust removal and denitration catalytic membrane material, relates to the technical field of catalysts, and aims at solving the problems that the existing dust removal and denitration integrated technology is not integrated in a real sense, the cost is relatively high, the space is wasted, and the process is complicated. The preparation method comprises the following steps: respectively roasting a Mn-Ce/Ti precursor and a V-W/Ti precursor into a Mn-Ce/Ti catalyst and a V-W/Ti catalyst, and ball-milling the Mn-Ce/Ti catalyst and the V-W/Ti catalyst into fine powder; mn-Ce/Ti catalyst powder and V-W/Ti catalyst powder are added into polytetrafluoroethylene resin, a blank membrane with denitration catalytic performance is prepared in a calendering mode, the blank membrane is properly stretched and then compounded with polytetrafluoroethylene or aramid fiber filtration, and therefore the dust removal and denitration integrated filtering membrane material is obtained. According to the invention, particulate matters can be filtered and denitrified at the same time, and the space and capital investment occupied by denitration and dust removal equipment are saved.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a method for preparing a dust removal and denitration catalytic membrane material. Background technique [0002] The emission of dust particles and nitrogen oxides will not only pollute the environment, but also endanger the ecological balance. Therefore, it is very important to control the emission of nitrogen oxides from dust particles. For a long time, dust particles and nitrogen oxides in industrial kiln flue gas have been treated separately. Dust particles are mainly removed by bag dust removal, and nitrogen oxides are mainly removed by SNCR or SCR catalysts. With the continuous innovation of technology and the requirements of economic and social development, integrated technology has developed rapidly due to its advantages of low cost, small footprint, and convenient maintenance. [0003] The traditional integrated technology is to arrange denitrification and dust remov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/56B01D46/00
Inventor 严烁梁燕聂孙建杨东周冠辰胡呈杰孙凯胡俊俊
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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