CN112044176B - NO catalytic oxidation filter bag for rapid SCR reaction and preparation method thereof - Google Patents
NO catalytic oxidation filter bag for rapid SCR reaction and preparation method thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/889—Manganese, technetium or rhenium
- B01J23/8892—Manganese
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/03—Precipitation; Co-precipitation
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- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/0208—Single-component fibres
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- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0618—Non-woven
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention discloses a NO catalytic oxidation filter bag for rapid SCR reaction and a preparation method thereof, wherein manganese nitrate, cerous nitrate hexahydrate and cobalt chloride hexahydrate are subjected to a coprecipitation method to prepare catalyst composite powder; blending and ball-milling the catalyst composite powder and polytetrafluoroethylene powder to obtain uniformly mixed catalyst modified polytetrafluoroethylene powder; adding kerosene into the catalyst modified polytetrafluoroethylene powder, uniformly mixing, standing for aging, and extruding to obtain a catalyst modified polytetrafluoroethylene rod-shaped material; rolling the catalyst modified polytetrafluoroethylene rod-shaped material into a belt, and then adopting a film cracking process to obtain catalyst modified polytetrafluoroethylene fibers; and finally carrying out needle-punching knitting. The filter bag NO catalytic oxidation efficiency is high, the catalyst has long service life, and the filter bag NO catalytic oxidation catalyst has the advantages of simple process, easiness in operation, small engineering modification, low operation cost and the like. The preparation technology of the invention is convenient for industrial scale production and has high engineering application value.
Description
Technical Field
The invention belongs to the technical field of coal-fired flue gas purification, and particularly relates to an NO catalytic oxidation filter bag for rapid SCR reaction and a preparation method thereof.
Background
The rapid SCR reaction is a novel flue gas denitration technology appearing in recent years, and is realized by increasing NO in nitric oxide on the basis of standard SCR reaction2In proportion to accelerate NOxAnd (3) catalyzing the reaction process of reduction. The technology is characterized in that: the reaction speed is high (10 times of that of the conventional SCR) and the catalytic efficiency is high, so that the catalyst can still keep higher activity at low temperature and high space velocity. Therefore, the rapid SCR reaction has wide application prospect in the fields of low-load denitration of coal-fired power plants, ultralow emission of industrial boilers (kilns), flue gas denitration of waste incineration power plants and the like.
Selectively oxidizing NO in the flue gas before denitration into NO2Is the core technology of rapid SCR reaction. There are currently two main approaches to achieve pre-oxidation of NO: one is a catalytic oxidation process, i.e. the catalytic oxidation of NO to NO is carried out using a specially prepared catalyst2Patents CN105521709B, CN105688662B, CN108993579A, CN107051203A and CN111167477A all report such methods and corresponding catalysts; the other is an oxidant method, namely NO is oxidized into NO by spraying an oxidant into the flue gas2Common oxidants include ozone, hydrogen peroxide, chlorine dioxide, hypochlorite and the like, and the method is reported in patent CN 108404653A. The method has the following characteristics: the catalytic oxidation method has large engineering modification and difficult implementation; the oxidant method has high operation cost and lower technical economy.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a NO catalytic oxidation filter bag for rapid SCR reaction and a preparation method thereof.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a NO catalytic oxidation filter bag for rapid SCR reaction is characterized in that a NO oxidation catalyst is loaded on a filter bag made of high-temperature resistant filter fibers.
The invention further improves that the NO oxidation catalyst is manganese oxide-cerium oxide-cobalt oxide composite powder, wherein the mass ratio of manganese oxide, cerium oxide and cobalt oxide in the manganese oxide-cerium oxide-cobalt oxide composite powder is 3: 2: 1.
the invention has the further improvement that the mass of the NO oxidation catalyst accounts for 30-40% of the mass of the catalytic oxidation filter bag.
The invention is further improved in that the high-temperature resistant filter fibers are polytetrafluoroethylene fibers.
The preparation method of the NO catalytic oxidation filter bag for the rapid SCR reaction comprises the following steps:
(1) manganese nitrate, cerous nitrate hexahydrate and cobalt chloride hexahydrate are subjected to a coprecipitation method to prepare catalyst composite powder;
(2) blending and ball-milling the catalyst composite powder and polytetrafluoroethylene powder to obtain uniformly mixed catalyst modified polytetrafluoroethylene powder;
(3) adding kerosene into the catalyst modified polytetrafluoroethylene powder, uniformly mixing, standing for aging, pre-extruding for 12-15 minutes under the pressure of 2.5-3.5 MPa, and extruding under the pressure of 5.5MPa to obtain a catalyst modified polytetrafluoroethylene rod-shaped material; rolling the catalyst modified polytetrafluoroethylene rod-shaped material into a belt, and then obtaining catalyst modified polytetrafluoroethylene fibers by adopting a membrane cracking method; and finally, preparing the NO catalytic oxidation filter bag for the rapid SCR reaction by using a needle punching method.
The invention is further improved in that the specific process of the step (1) is as follows:
manganese nitrate, cerous nitrate hexahydrate and cobalt chloride hexahydrate are mixed according to a mass ratio of 1.6: 1.3: 1, adding the mixture into deionized water, stirring to form a solution, dropwise adding ammonia water into the solution to control the pH value to be 8 until precipitation is finished, filtering, washing and drying to obtain precursor powder, roasting the precursor powder in air at 400 ℃ for 4 hours, grinding and sieving to prepare particles of 1200 meshes, thus obtaining the catalyst composite powder.
The further improvement of the invention is that in the step (2), the catalyst composite powder accounts for 30-40% of the total mass of the catalyst composite powder and the polytetrafluoroethylene powder.
In the further improvement of the invention, in the step (2), the average grain diameter of the polytetrafluoroethylene powder is 50 microns.
The further improvement of the invention is that in the step (3), kerosene accounts for 30-40% of the weight of the catalyst modified polytetrafluoroethylene powder; the specific conditions of ball milling are as follows: grinding for 60-100 minutes at a rotation speed of 200-300 rpm.
The further improvement of the invention is that in the step (3), the mixture is kept stand and aged for 40 to 48 hours at the temperature of between 55 and 57 ℃; the kerosene released during the aging process is recovered by condensation.
Compared with the prior art, the invention has the following beneficial technical effects:
(1) the invention discloses a NO pre-oxidation technology based on a filter bag, which belongs to a catalytic oxidation method, but is different from the traditional catalytic oxidation method based on a special catalyst. Meanwhile, compared with an oxidant oxidation method, the method has the advantage of low technical operation cost.
(2) The filter bag disclosed by the invention is formed by implanting a catalyst for NO oxidation into filter fibers and then weaving, can be used in combination with a conventional dust removal filter bag, namely, firstly removes dust and then carries out NO catalytic oxidation, and compared with a conventional catalytic oxidation method, the filter bag not only can obtain higher NO catalytic oxidation efficiency, but also is beneficial to prolonging the service life of the catalyst.
(3) The preparation technology of the catalytic oxidation filter bag disclosed by the invention mainly utilizes a conventional polytetrafluoroethylene filter bag production process, only key processes such as catalyst modified polytetrafluoroethylene powder, rod-shaped materials of the catalyst modified polytetrafluoroethylene powder and the like are innovated and optimized, and the strength, hardness and section uniformity (no phase separation) of the prepared catalyst modified polytetrafluoroethylene rod-shaped materials can be ensured only by pre-extruding for 12-15 minutes under the conditions of 30-40% kerosene swelling and 2.5-3.5 MPa pressure. Therefore, the preparation method is convenient for industrial scale production and has high engineering application value.
(4) The preparation method of the catalytic filter bag provided by the invention overcomes the defects of large resistance, limited catalyst loading capacity and the like existing in a coating method, solves the problems of poor catalyst dispersibility, weak bonding strength with fibers and the like existing in an impregnation method, and is beneficial to improving the comprehensive performance and the service life of the catalytic filter material. The preparation method of the catalytic filter bag disclosed by the invention adopts a coprecipitation method to prepare the catalyst powder, so that organic solvent pollution can be avoided, and most of swelling agent kerosene can be recycled, therefore, the method disclosed by the invention has higher environmental protection, and the catalyst loading in the prepared filter bag is high, thereby being beneficial to obtaining higher catalytic efficiency.
Detailed Description
The present invention will be further described with reference to the following examples.
A NO catalytic oxidation filter bag for rapid SCR reaction is a filter bag loaded with NO oxidation catalyst and made of high-temperature resistant filter fibers. The NO oxidation catalyst is manganese oxide-cerium oxide-cobalt oxide composite powder, wherein the mass ratio of manganese oxide, cerium oxide and cobalt oxide in the manganese oxide-cerium oxide-cobalt oxide composite powder is 3: 2: 1; the mass of the manganese oxide-cerium oxide-cobalt oxide composite powder accounts for 30-40% of the total mass of the NO catalytic oxidation filter bag; the high temperature resistant filter fiber is polytetrafluoroethylene fiber.
The method comprises the steps of firstly preparing manganese oxide-cerium oxide-cobalt oxide catalyst composite powder by a coprecipitation method, then preparing catalyst modified polytetrafluoroethylene fiber powder by a ball milling method, then preparing catalyst modified polytetrafluoroethylene fiber by a membrane cracking process of oil removal, sintering, stretching, needling, carding, curling and cutting, and finally needling to form the catalytic oxidation filter bag. Compared with the traditional method, the NO pre-oxidation technology based on the filter bag has the advantages of high NO catalytic oxidation efficiency, long service life of the catalyst, simple process, easiness in operation, small engineering modification, low operation cost and the like. Meanwhile, the preparation technology of the filter bag disclosed by the invention mainly utilizes the conventional polytetrafluoroethylene filter bag production process, and only innovates and optimizes the key process, so that the preparation technology is convenient for industrial mass production and has high engineering application value.
Specifically, the preparation method of the NO catalytic oxidation filter bag for the rapid SCR reaction comprises the following steps:
(1) preparation of catalyst composite powder
The catalyst is prepared by a coprecipitation method, namely, firstly, manganese nitrate, cerous nitrate hexahydrate and cobalt chloride hexahydrate are mixed according to the mass ratio of 1.6: 1.3: 1, adding the mixture into deionized water, stirring to form a solution, dropwise adding ammonia water into the solution to control the pH value of the system to be 8-9 until precipitation is finished, filtering, washing and drying to obtain precursor powder, roasting in air at 400 ℃ for 4 hours, grinding and sieving to prepare particles with the size of about 1200 meshes, and thus obtaining the catalyst composite powder.
(2) Preparation of catalyst modified polytetrafluoroethylene powder
Weighing the catalyst composite powder and polytetrafluoroethylene powder (with the average particle size of 50 microns), adding the catalyst composite powder and the polytetrafluoroethylene powder into a ball mill, and grinding for 60-100 minutes at the rotating speed of 200-300 revolutions per minute to obtain the catalyst modified polytetrafluoroethylene powder which is uniformly mixed. Wherein the catalyst composite powder accounts for 30-40% of the total mass of the catalyst composite powder and the polytetrafluoroethylene powder.
(3) Preparation and weaving of catalyst modified polytetrafluoroethylene fiber
Adding kerosene into the catalyst modified polytetrafluoroethylene powder, sealing, stirring and mixing uniformly at room temperature, standing and aging at 55-57 ℃ for 40-48h, recovering the kerosene released in the aging process by a condensation method, pre-extruding the powder for 12-15 minutes under the pressure of 2.5-3.5 MPa after aging, and then extruding under the pressure of 5.5MPa to obtain the catalyst modified polytetrafluoroethylene rod-shaped material. The catalyst modified polytetrafluoroethylene fiber is prepared by rolling a catalyst modified polytetrafluoroethylene rod-shaped material into a belt, and then performing oil removal, sintering, stretching, needling, carding, curling and cutting according to a film cracking process. And finally, according to a needling process, opening, mixing, carding, lapping, needling, calendaring, singeing, impregnating, heat setting, slitting and sewing, the catalyst modified polytetrafluoroethylene fiber is woven into a filter bag. Wherein, the kerosene accounts for 30-40% of the weight of the catalyst modified polytetrafluoroethylene powder.
In the invention, the qualified catalyst modified polytetrafluoroethylene rod-shaped material can be obtained only by pre-extruding for 12-15 minutes under the conditions of 30-40% kerosene swelling and 2.5-3.5 MPa pressure. If the method is not carried out according to the conditions in the invention, the catalyst modified polytetrafluoroethylene rod-shaped material cannot be obtained, the strength and the hardness are insufficient, the section of the rod-shaped material is uneven, and phase separation occurs, so that the next step cannot be carried out.
And (3) evaluating the NO oxidation performance of the obtained catalytic oxidation filter material on an SCR denitration test bed by using simulated flue gas. Testing NO and NO in inlet and outlet flue gas of reactor by using flue gas analyzer2Concentration, the NO oxidation efficiency was calculated.
The following are specific examples.
Example 1
(1) Preparation of catalyst composite powder
The catalyst is prepared by a coprecipitation method, namely, firstly, manganese nitrate, cerous nitrate hexahydrate and cobalt chloride hexahydrate are mixed according to the mass ratio of 1.6: 1.3: 1 adding into deionized water, stirring to form a solution, dropwise adding ammonia water into the solution to control the pH value of the system to be 8 until precipitation is finished, filtering, washing and drying to obtain precursor powder, roasting in air at 400 ℃ for 4 hours, grinding and sieving to prepare particles with about 1200 meshes, thus obtaining the catalyst composite powder.
(2) Preparation of catalyst modified polytetrafluoroethylene powder
Weighing the catalyst composite powder and polytetrafluoroethylene powder (with the average particle size of 50 microns), adding the catalyst composite powder and the polytetrafluoroethylene powder into a ball mill, and grinding for 80 minutes at the rotating speed of 250 revolutions per minute to obtain the catalyst modified polytetrafluoroethylene powder which is uniformly mixed. Wherein the catalyst composite powder accounts for 30 percent of the total mass of the catalyst composite powder and the polytetrafluoroethylene powder.
(3) Preparation and weaving of catalyst modified polytetrafluoroethylene fiber
Adding kerosene into the catalyst modified polytetrafluoroethylene powder, sealing, stirring and mixing uniformly at room temperature, standing and aging at about 55 ℃ for 48h, recovering the kerosene released in the aging process by a condensation method, pre-extruding the powder for 12 minutes under the pressure of 3.5MPa after aging, and then extruding under the pressure of 5.5MPa to obtain the catalyst modified polytetrafluoroethylene rod-shaped material. The catalyst modified polytetrafluoroethylene fiber is prepared by rolling a catalyst modified polytetrafluoroethylene rod-shaped material into a belt, and then performing oil removal, sintering, stretching, needling, carding, curling and cutting according to a film cracking process. And finally, according to a needling process, opening, mixing, carding, lapping, needling, calendaring, singeing, impregnating, heat setting, slitting and sewing, the catalyst modified polytetrafluoroethylene fiber is woven into a filter bag. Wherein, the kerosene accounts for 35 percent of the weight of the catalyst modified polytetrafluoroethylene powder.
And (3) evaluating the NO oxidation performance of the obtained catalytic oxidation filter material on an SCR denitration test bed by using simulated flue gas. Testing NO and NO in inlet and outlet flue gas of reactor by using flue gas analyzer2Concentration, the NO oxidation efficiency was calculated to be 90%.
Examples 2-13 were prepared in the same manner as in example 1, except that the preparation parameters were different from those of example 1, and the details of the preparation parameters and the efficiency of catalytic oxidation of NO are shown in Table 1.
Table 1 results of examples
At present, the preparation method of the similar catalytic filter bag mainly comprises a coating method and an impregnation method. The preparation method of the catalytic filter bag provided by the invention overcomes the defects of large resistance, limited catalyst loading capacity and the like existing in a coating method, solves the problems of poor catalyst dispersibility, weak bonding strength with fibers and the like existing in an impregnation method, and is beneficial to improving the comprehensive performance and the service life of the catalytic filter material. In addition, patent CN 110180261 a discloses a novel impregnation method for preparing a catalytic filter bag, but the preparation process involves a sol-gel method, the amount of organic solvent is large, and the impregnation liquid prepared by pickering polymerization has a limited catalyst content, resulting in a low catalyst loading in the filter bag. The catalytic filter bag preparation method disclosed in patent CN 110180261 a also relates to a sol-gel method, and a large amount of dioctyl phthalate which cannot be recovered can cause organic solvent pollution. The preparation method of the catalytic filter bag disclosed by the invention adopts a coprecipitation method to prepare the catalyst powder, so that organic solvent pollution can be avoided, and most of swelling agent kerosene can be recycled, therefore, the method disclosed by the invention has higher environmental protection, and the catalyst loading in the prepared filter bag is high, thereby being beneficial to obtaining higher catalytic efficiency.
Claims (4)
1. The preparation method of the NO catalytic oxidation filter bag for the rapid SCR reaction is characterized by comprising the following steps of:
(1) manganese nitrate, cerous nitrate hexahydrate and cobalt chloride hexahydrate are subjected to a coprecipitation method to prepare catalyst composite powder;
(2) blending and ball-milling the catalyst composite powder and polytetrafluoroethylene powder to obtain uniformly mixed catalyst modified polytetrafluoroethylene powder;
(3) adding kerosene into the catalyst modified polytetrafluoroethylene powder, uniformly mixing, standing for aging, pre-extruding for 12-15 minutes under the pressure of 2.5-3.5 MPa, and extruding under the pressure of 5.5MPa to obtain a catalyst modified polytetrafluoroethylene rod-shaped material; rolling the catalyst modified polytetrafluoroethylene rod-shaped material into a belt, and then obtaining catalyst modified polytetrafluoroethylene fibers by adopting a membrane cracking method; finally, preparing an NO catalytic oxidation filter bag for rapid SCR reaction by using a needle punching method;
the specific process of the step (1) is as follows:
manganese nitrate, cerous nitrate hexahydrate and cobalt chloride hexahydrate are mixed according to a mass ratio of 1.6: 1.3: 1, adding the mixture into deionized water, stirring to form a solution, dropwise adding ammonia water into the solution to control the pH value to be 8 until precipitation is finished, filtering, washing and drying to obtain precursor powder, roasting the precursor powder in air at 400 ℃ for 4 hours, grinding and sieving to prepare particles of 1200 meshes to obtain catalyst composite powder;
the catalyst composite powder accounts for 30-40% of the total mass of the catalyst composite powder and the polytetrafluoroethylene powder.
2. The method for preparing the NO catalytic oxidation filter bag for the rapid SCR reaction according to claim 1, wherein in the step (2), the average particle size of the polytetrafluoroethylene powder is 50 μm; the specific conditions of ball milling are as follows: grinding for 60-100 minutes at a rotation speed of 200-300 rpm.
3. The preparation method of the NO catalytic oxidation filter bag for the rapid SCR reaction according to claim 1, wherein in the step (3), kerosene accounts for 30-40% of the weight of the catalyst modified polytetrafluoroethylene powder.
4. The method for preparing a NO catalytic oxidation filter bag for rapid SCR reaction according to claim 1, wherein in the step (3), the filter bag is kept standing and aged at 55-57 ℃ for 40-48 h; the kerosene released during the aging process is recovered by condensation.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553573A (en) * | 2011-12-29 | 2012-07-11 | 中国科学院过程工程研究所 | Nitrogen oxide oxidizing catalyst and preparation method of nitrogen oxide oxidizing catalyst |
| CN104524886A (en) * | 2015-01-13 | 2015-04-22 | 安徽省元琛环保科技有限公司 | Denitration and dust removal integrated functional filter bag of double-layer structure |
| CN106268855A (en) * | 2016-08-08 | 2017-01-04 | 西安热工研究院有限公司 | A kind of low temperature NO oxidation catalyst and preparation method thereof and using method |
| CN107475795A (en) * | 2017-08-03 | 2017-12-15 | 安徽元琛环保科技股份有限公司 | A kind of denitration polytetrafluoroethylene fibre and preparation method thereof |
| CN108635983A (en) * | 2018-04-18 | 2018-10-12 | 中国矿业大学(北京) | A kind of low temperature dedusting and denitrification integral reaction unit |
| CN110124508A (en) * | 2018-02-02 | 2019-08-16 | 天津博仕化工科技有限公司 | A kind of de- dioxin dedusting Trinity catalysis filter bag of denitration |
| CN110180261A (en) * | 2019-05-13 | 2019-08-30 | 西安热工研究院有限公司 | A kind of preparation method of denitration filtrate |
| CN112169583A (en) * | 2020-09-22 | 2021-01-05 | 西安热工研究院有限公司 | Flue gas denitration method for waste incineration power plant |
-
2020
- 2020-09-29 CN CN202011052722.3A patent/CN112044176B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553573A (en) * | 2011-12-29 | 2012-07-11 | 中国科学院过程工程研究所 | Nitrogen oxide oxidizing catalyst and preparation method of nitrogen oxide oxidizing catalyst |
| CN104524886A (en) * | 2015-01-13 | 2015-04-22 | 安徽省元琛环保科技有限公司 | Denitration and dust removal integrated functional filter bag of double-layer structure |
| CN106268855A (en) * | 2016-08-08 | 2017-01-04 | 西安热工研究院有限公司 | A kind of low temperature NO oxidation catalyst and preparation method thereof and using method |
| CN107475795A (en) * | 2017-08-03 | 2017-12-15 | 安徽元琛环保科技股份有限公司 | A kind of denitration polytetrafluoroethylene fibre and preparation method thereof |
| CN110124508A (en) * | 2018-02-02 | 2019-08-16 | 天津博仕化工科技有限公司 | A kind of de- dioxin dedusting Trinity catalysis filter bag of denitration |
| CN108635983A (en) * | 2018-04-18 | 2018-10-12 | 中国矿业大学(北京) | A kind of low temperature dedusting and denitrification integral reaction unit |
| CN110180261A (en) * | 2019-05-13 | 2019-08-30 | 西安热工研究院有限公司 | A kind of preparation method of denitration filtrate |
| CN112169583A (en) * | 2020-09-22 | 2021-01-05 | 西安热工研究院有限公司 | Flue gas denitration method for waste incineration power plant |
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