CN109126313B - Bag type dust removal, catalytic denitration and dioxin removal integrated device - Google Patents
Bag type dust removal, catalytic denitration and dioxin removal integrated device Download PDFInfo
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- CN109126313B CN109126313B CN201811085333.3A CN201811085333A CN109126313B CN 109126313 B CN109126313 B CN 109126313B CN 201811085333 A CN201811085333 A CN 201811085333A CN 109126313 B CN109126313 B CN 109126313B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
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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
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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
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a bag type dust removal, catalytic denitration and dioxin removal integrated device. The bag cage installed in the filter bag of the bag type dust collector is a catalytic bag cage, the catalytic bag cage takes a metal wire mesh bag cage as a base body and loads a catalyst, and the metal wire mesh contains metal fibers; the preparation process of the catalytic bag cage comprises the following steps: dipping a metal wire mesh bag cage in an adhesive for slurry coating, lifting the bag cage, placing the bag cage in a closed box, spraying catalyst powder into the box, depositing the powder on the surface of metal fibers under the action of the adhesive for powder coating, finally conveying the bag cage coated with the powder to a heating furnace, volatilizing and burning the adhesive under the action of high temperature, sintering catalyst particles and attaching the catalyst particles to the surface of the metal wire mesh, thereby realizing catalyst loading. The invention organically combines the flue gas bag type dust removal with the catalytic denitration or dioxin removal, realizes the flue gas dust removal denitration or dioxin removal cooperative purification, thereby effectively utilizing the internal space of the dust remover, reducing the number of equipment, saving the occupied land and reducing the engineering investment and the operating cost.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a bag type dust removal, catalytic denitration and dioxin removal integrated device for cooperatively removing particulate matters and nitrogen oxides or cooperatively removing particulate matters and dioxin in industrial flue gas.
Background
The industrial flue gas often contains Particulate Matters (PM) and Nitrogen Oxides (NO) x ) Some special industries also contain dioxin in the smoke, and toxic and harmful substances such as particulate matters, nitric oxides, dioxin and the like in the smoke are purified according to the environmental protection requirement and are discharged after reaching the standard.
Taking nitrogen oxide removal as an example, a common flue gas purification technical scheme in engineering is to firstly adopt a Selective Catalytic Reduction (SCR) device for denitration and then use a bag type dust collector for removing particulate matters; or firstly removing the particulate matters by using a bag type dust collector and then denitrating by using a medium-low temperature SCR reactor. The common defects of the two technical schemes are that the SCR reactor and the bag type dust collector are independently arranged, the equipment is more, the occupied area is large, the investment is high, and the operation energy consumption and the cost are high.
Patent document of application No. 201420029776.1 tries to unite two into one bag type dust removal and catalytic denitration reactor, be about to SCR catalytic denitration reactor sets up on bag type dust remover export decline flue, make up into integrated device with two equipment, but this kind of combination is only a simple combination and deformation, bag type dust remover and SCR catalytic denitration reactor's constitution does not take place essential change, the filter bag, the bag cage, key parts such as honeycomb catalyst do not reduce, fail to really realize dust removal and denitration's purification in coordination.
The Gore company in the united states has proposed a technology based on bag-type dust removal and simultaneous denitration or dioxin removal, and the technical scheme is that a filter bag of a bag-type dust remover is loaded with a catalyst, so that the filter bag has double functions of filtering and catalytic denitration or dioxin removal, and industrial application is realized. However, the technology has the defects of complex process, high manufacturing difficulty and the like, and the denitration effect after loading is unstable and the cost is high due to various filter material fibers.
It is easy to see that people are trying to find a better technical solution, which is expected to solve the above problems.
Disclosure of Invention
The invention aims to solve the problems of more equipment, large occupied area, high investment and lack of synergistic effect of the conventional flue gas dust removal and denitration or dioxin removal process, particularly the problems of difficulty in loading a catalyst on a filter material, unstable effect and high cost, and provides a bag type dust removal, catalytic denitration and dioxin removal integrated device to achieve the synergistic effect of dust removal, denitration or dioxin removal.
In order to achieve the object, one aspect of the present invention provides a catalytic bag cage for a bag filter, wherein the catalytic bag cage is a catalytic bag cage, the catalytic bag cage is a catalytic bag cage which uses a wire mesh bag cage as a substrate and supports a catalyst, and the wire mesh contains metal fibers; the preparation process of the catalytic bag cage comprises the following steps: dipping a metal wire mesh bag cage in an adhesive for slurry coating, lifting the bag cage, placing the bag cage in a closed box, spraying catalyst powder into the box, depositing the powder on the surface of metal fibers under the action of the adhesive for powder coating, finally conveying the bag cage coated with the powder to a heating furnace, volatilizing and burning the adhesive under the action of high temperature, sintering catalyst particles and attaching the catalyst particles to the surface of the metal wire mesh, thereby realizing catalyst loading.
The active components of the catalyst loaded by the catalytic bag cage are selected according to the physicochemical properties of the gaseous pollutants to be removed, and comprise a noble metal catalyst and a metal oxide catalyst; noble metal catalysts include, but are not limited to, Ag, Pt, Pd; metal oxide catalysts include, but are not limited to, Al2O3、TiO2、RhV2O5、WO3、MoO3、CuO、Fe2O3. The components and the proportion of the binder are determined according to the type of the catalyst, the load strength and the sintering temperature, and the components of the binder include but are not limited to methyl cellulose, glass fiber, glycerol, polyacrylamide, stearic acid and polypropylene.
The metal wire mesh bag cage is designed into a multilayer woven wire mesh, a foam metal, a metal fiber felt and a fiber filler type, so that the specific surface area is increased.
The metal wire mesh bag cage is cylindrical, elliptic cylindrical or rectangular.
According to the inventionThe other aspect provides a bag type dust removal, denitration and dioxin removal integrated device adopting a catalytic bag cage, which comprises an air inlet, a filter chamber, a pattern plate, a filter bag, the catalytic bag cage, an ash bucket, an air purifying chamber, an ash removal device, an air outlet and a reaction gas injection device, wherein the reaction gas injection device is arranged in the air inlet; the catalytic bag cage is used for supporting the filter bag and simultaneously performing catalytic denitration or dioxin removal, wherein Al is selected for catalytic denitration2O3Catalyst for catalytic removal of dioxin and TiO2A catalyst; the gas injected by the reaction gas injection device is determined according to the physicochemical properties of the removed gaseous pollutants, and the flue gas denitration reaction gas injection device is a reducing agent NH3The spraying device is an oxidant O2An injection device; catalytic bag cage for decomposing NO by catalytic action x Is N2And H2O; or decomposing dioxins into H2O、CO2And HCl; based on this, the device of the invention integrally forms an integrated device, can catalyze denitration or dioxin removal while filtering and removing dust, and has the function of dust removal, denitration or dioxin removal cooperative purification.
The ash removal device comprises pulse blowing ash removal, back blowing ash removal and back suction ash removal types.
The working principle of the device is as follows: taking dust removal and denitration as an example, when smoke passes through the air inlet, the smoke is fully mixed with ammonia (reducing agent) sprayed by the ammonia spraying device and then enters the filtering chamber, particulate matters in the smoke are filtered and removed by the filter bag (external filtering type), and meanwhile, denitration (selective catalytic reduction reaction) is completed under the catalytic action of the catalytic bag cage, so that NO is generated x Reduction to N2And H2And O, the purified flue gas enters the gas purifying chamber from the inside of the bag cage to the bottom and the top through the pattern plate holes, and is finally discharged from the air outlet. When the dust on the surface of the filter bag is accumulated to a certain thickness, the filtering resistance is increased, the control system sends an instruction, the ash removal device starts to work to remove the ash from the filter bag, the fallen dust is settled in the ash bucket, and finally the dust is discharged from the ash discharge port.
The invention has the beneficial effects that: the flue gas bag type dust removal and catalytic denitration or dioxin removal are organically combined, the dust removal and denitration or dioxin removal integrated device is formed by loading a catalyst on a bag cage, the device has a dual-purpose function, and the flue gas dust removal and denitration or dioxin removal cooperative purification is realized, so that the internal space of the dust remover is effectively utilized, the number of equipment is reduced, the occupied area is saved, and the engineering investment and the operating cost are reduced.
Drawings
FIG. 1 shows an integrated device for bag type dust removal, catalytic denitration and dioxin removal.
FIG. 2 is a big sample of a card, a filter bag and a catalytic bag cage node.
FIG. 3 is a catalytic bag cage supported catalyst.
In the figure: 1. an air inlet; 2. a filtering chamber; 3. a pattern plate; 4. a filter bag; 5. a catalytic bag cage; 51. a metal fiber; 52. catalyst particles; 6. an ash hopper; 7. a gas purifying chamber; 8. a dust removal device; 9. an air outlet; 10. and a reaction gas injection device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the integrated device for bag-type dust removal, catalytic denitration and dioxin removal comprises an air inlet 1, a filter chamber 2, a pattern plate 3, a filter bag 4, a catalytic bag cage 5, an ash bucket 6, an air purifying chamber 7, an ash removal device 8, an air outlet 9 and a reaction gas injection device 10, wherein the reaction gas injection device 10 is arranged in the air inlet 1; the reaction gas injection device 10 is switched on NH3Or is connected to O2(ii) a The air inlet 1 is welded on the side surface of the filtering chamber 2, the pattern plate 3 is welded on the filtering chamber 2, the filtering bag 4 and the catalytic bag cage 5 are arranged on the pattern plate hole, and the ash bucket 6 is welded under the filtering chamber 2; an air purifying chamber 7 is welded on the upper portion of the pattern plate 3, an ash removing device 8 is installed inside the air purifying chamber 7, and an air outlet 9 is welded on the side face of the air purifying chamber 7.
As shown in FIG. 2, the catalytic bag cage 5 is installed in the filter bag 4, and the filter bag 4 is installed on the pattern plate hole of the pattern plate 3.
As shown in fig. 3, the catalytic bag cage 5 supports a catalyst by using a wire mesh bag cage as a base, the wire mesh containing metal fibers 51; the preparation process of the catalytic bag cage comprises the following steps: dipping a metal wire mesh bag cage in an adhesive for slurry coating, lifting the bag cage, placing the bag cage in a closed box, spraying catalyst powder into the box, depositing the powder on the surface of the metal fiber 51 under the action of the adhesive for powder coating, finally conveying the bag cage coated with the powder to a heating furnace, volatilizing and burning the adhesive under the action of high temperature, and sintering and attaching the catalyst particles 52 on the surface of the metal wire mesh to realize catalyst loading.
The bag-type dust removal, catalytic denitration and dioxin removal integrated device operates, for example, dust removal and denitration are performed, flue gas is communicated after the device is installed, and when the flue gas passes through the air inlet 1, the flue gas and ammonia gas (reducing agent NH) sprayed by the ammonia spraying device 10 are communicated3) Fully mixed and then enters a filter chamber 2, particulate matters in the flue gas are filtered and removed by a filter bag 4, and meanwhile, denitration and selective catalytic reduction reaction are completed under the catalytic action of a catalytic bag cage 5, so that NO is generated x Reduction to N2And H2And O, the purified flue gas enters the gas purifying chamber 7 from the inside of the catalytic bag cage 5 to the bottom and from the top through the pattern plate holes, and is finally discharged from the air outlet 9. When the dust on the surface of the filter bag 4 is accumulated to a certain thickness, the filtering resistance is increased, the control system sends an instruction, the ash removal device 8 starts to work for removing ash from the filter bag 4, the fallen dust is settled in the ash hopper 6, and finally the dust is discharged from the ash discharge port.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The catalytic bag cage of the bag type dust collector is characterized in that the bag cage arranged in a filter bag of the bag type dust collector is a catalytic bag cage, the catalytic bag cage takes a metal wire mesh bag cage as a base body and loads a catalyst, and the metal wire mesh contains metal fibers; the metal wire mesh bag cage is designed into a multilayer woven wire mesh, foam metal, metal fiber felt and fiber filler type; the preparation process of the catalytic bag cage comprises the following steps: dipping a metal wire mesh bag cage in an adhesive for slurry coating, lifting the bag cage, placing the bag cage in a closed box, spraying catalyst powder into the box, depositing the powder on the surface of metal fibers under the action of the adhesive for powder coating, finally conveying the bag cage coated with the powder to a heating furnace, volatilizing and burning the adhesive under the action of high temperature, sintering catalyst particles and attaching the catalyst particles to the surface of the metal wire mesh, thereby realizing catalyst loading.
2. The baghouse catalytic baghouse of claim 1 wherein the catalytic baghouse-supported catalyst has an active component selected based on the physicochemical properties of the gaseous contaminants to be removed, and comprises a noble metal catalyst, a metal oxide catalyst; noble metal catalysts include, but are not limited to, Ag, Pt, Pd; metal oxide catalysts include, but are not limited to, Al2O3、TiO2、RhV2O5、WO3、MoO3、CuO、Fe2O3。
3. The baghouse catalyst bag cage of claim 1, wherein the binder composition and ratio is determined by catalyst type, loading strength and sintering temperature, and the binder composition includes but is not limited to methylcellulose, glass fiber, glycerin, polyacrylamide, stearic acid, polypropylene.
4. The baghouse catalytic bag cage of claim 1, wherein said wire mesh bag cage is cylindrical, elliptical cylindrical, rectangular.
5. The integrated device for bag-type dust removal, denitration and dioxin removal by using the catalytic bag cage as claimed in any one of claims 1 to 4, which comprises an air inlet, a filter chamber, a pattern plate, a filter bag, the catalytic bag cage, an ash hopper, an air purifying chamber, an ash removing device, an air outlet, a reaction gas injection device, and a reactionThe gas injection device is arranged in the air inlet; the catalytic bag cage is used for supporting the filter bag and simultaneously performing catalytic denitration or dioxin removal, wherein Al is selected for catalytic denitration2O3Catalyst for catalytic removal of dioxin and TiO2A catalyst; the gas injected by the reaction gas injection device is determined according to the physicochemical properties of the removed gaseous pollutants, and the flue gas denitration reaction gas injection device is a reducing agent NH3The spraying device is an oxidant O2An injection device; catalytic bag cage for decomposing NO by catalytic action x Is N2And H2O; or decomposing dioxins into H2O、CO2And HCl.
6. The integrated device for bag type dust removal, denitration and dioxin removal according to claim 5, wherein the ash removal device comprises a pulse blowing ash removal type, a back blowing ash removal type and a back suction ash removal type.
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| CN201811085333.3A CN109126313B (en) | 2018-09-18 | 2018-09-18 | Bag type dust removal, catalytic denitration and dioxin removal integrated device |
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| CN201811085333.3A CN109126313B (en) | 2018-09-18 | 2018-09-18 | Bag type dust removal, catalytic denitration and dioxin removal integrated device |
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| CN109126313A CN109126313A (en) | 2019-01-04 |
| CN109126313B true CN109126313B (en) | 2020-07-21 |
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| CN109663500A (en) * | 2019-03-04 | 2019-04-23 | 浙江深度能源技术有限公司 | A kind of mostly de- bag filter of smoke catalytic |
| CN111013348A (en) * | 2019-12-23 | 2020-04-17 | 西安西矿环保科技有限公司 | Dust and nitrate integrated system and method suitable for multi-dust section in cement kiln |
| CN111603911A (en) * | 2020-06-29 | 2020-09-01 | 北京中航天业科技有限公司 | Dedusting, desulfurization and denitrification multifunctional integrated control system, method and application |
| WO2022040831A1 (en) * | 2020-08-23 | 2022-03-03 | 南京溧水高新创业投资管理有限公司 | Candle-type low pressure drop particle packed bed reactor |
| CN112546854B (en) * | 2020-11-21 | 2023-03-31 | 西安热工研究院有限公司 | Selective thermal sintering molding 3D printing dioxin removal bag cage and preparation method thereof |
| CN113813697B (en) * | 2021-08-06 | 2023-05-26 | 中国科学院工程热物理研究所 | Metal fiber filter material with functions of dust removal and catalytic purification of VOCs and preparation method thereof |
| CN113413696A (en) * | 2021-08-06 | 2021-09-21 | 中国科学院工程热物理研究所 | Combined process for simultaneously treating dust and VOCs and novel filter |
| CN114768401A (en) * | 2022-05-25 | 2022-07-22 | 江苏安达环保科技有限公司 | Processing technology for adding SCR denitration catalyst coating on metal fiber filter bag |
| CN115282773A (en) * | 2022-08-23 | 2022-11-04 | 山东菲天环保科技有限公司 | Catalytic denitration post |
| CN116173632B (en) * | 2023-03-30 | 2023-10-13 | 江苏安达环保科技有限公司 | Metal fiber catalytic filter bag processing equipment |
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| CN101511446B (en) * | 2006-07-26 | 2012-05-02 | 巴布考克日立株式会社 | Method for removing little deleterious substance in air exhaust and operation method thereof |
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| CN104492260A (en) * | 2014-12-31 | 2015-04-08 | 江苏科行环境工程技术有限公司 | Glass kiln flue gas dust removal and denitration integrated process and device |
| CN106474920A (en) * | 2016-11-23 | 2017-03-08 | 宋朋泽 | A kind of high-temperature flue gas pollutant cooperative control system |
| CN106975473A (en) * | 2017-05-27 | 2017-07-25 | 苏州思美特表面材料科技有限公司 | The supported materials catalyst of network structure |
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