CN110469859B - Organic waste gas catalytic combustion treatment device capable of solving short-term deactivation of catalyst - Google Patents
Organic waste gas catalytic combustion treatment device capable of solving short-term deactivation of catalyst Download PDFInfo
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- CN110469859B CN110469859B CN201910835775.3A CN201910835775A CN110469859B CN 110469859 B CN110469859 B CN 110469859B CN 201910835775 A CN201910835775 A CN 201910835775A CN 110469859 B CN110469859 B CN 110469859B
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- waste gas
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- 239000003054 catalyst Substances 0.000 title claims abstract description 60
- 239000007789 gas Substances 0.000 title claims abstract description 32
- 238000007084 catalytic combustion reaction Methods 0.000 title claims abstract description 28
- 239000010815 organic waste Substances 0.000 title claims abstract description 23
- 230000009849 deactivation Effects 0.000 title claims abstract description 18
- 230000003197 catalytic effect Effects 0.000 claims abstract description 76
- 238000010438 heat treatment Methods 0.000 claims abstract description 39
- 238000004321 preservation Methods 0.000 claims abstract description 14
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 4
- 239000007809 chemical reaction catalyst Substances 0.000 claims abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 26
- 239000003345 natural gas Substances 0.000 claims description 15
- 239000002912 waste gas Substances 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 2
- 239000010970 precious metal Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 239000012855 volatile organic compound Substances 0.000 abstract description 6
- 238000000746 purification Methods 0.000 abstract description 5
- 230000008929 regeneration Effects 0.000 abstract description 5
- 238000011069 regeneration method Methods 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000006116 polymerization reaction Methods 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 230000008021 deposition Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 229910000510 noble metal Inorganic materials 0.000 description 11
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 8
- 239000000306 component Substances 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention relates to an organic waste gas catalytic combustion treatment device capable of solving the short-term deactivation of a catalyst, which comprises a framework, a heat preservation layer structure, a catalytic layer fixing frame, a heating device, an airflow inlet and an airflow outlet; the catalytic layer fixing frame and the heating device are arranged in the framework and the heat preservation structure, and the heating device is used for heating a catalyst on the catalytic layer fixing frame; the catalytic layer fixing frame is divided into an upper catalytic layer and a lower catalytic layer, the upper catalytic layer is a pre-catalytic layer and is used for placing a pre-catalytic catalyst, the lower catalytic layer is a catalytic layer and is used for placing an organic waste gas catalytic reaction catalyst. The invention can solve the problem of the reduction of the overall purification efficiency caused by the polymerization and carbon deposition of VOCs in the use process of catalytic combustion; meanwhile, the high-efficiency regeneration of the pre-catalytic layer is realized through thick film heating.
Description
Technical Field
The invention relates to a catalyst protection device, in particular to an organic waste gas catalytic combustion treatment device capable of solving the short-term deactivation of a catalyst.
Background
The catalytic combustion carries out flameless catalytic combustion on VOCs waste gas at a lower temperature under the action of a noble metal catalyst, converts organic components into non-toxic and harmless CO 2 and H 2 O, simultaneously releases a large amount of heat, and can maintain the ignition temperature required by the catalytic combustion when combined with an adsorption concentration process, so that the waste gas combustion process basically does not need additional energy (electric energy). The cost of the noble metal catalyst serving as a core component in the device is higher, the service life of the catalyst determines the economical efficiency of the whole set of treatment device, in the actual use process, VOCs waste gas components generated by enterprises are different, and when organic waste gas which is easy to polymerize such as styrene exists in the waste gas components, the surface of the noble metal catalyst is easy to have the conditions of polymer coating and carbon deposition, so that the catalyst is inactivated briefly. The prior method for treating the temporary deactivation of the catalyst is regeneration through high-temperature oxidation, on one hand, more energy is wasted, and on the other hand, the high-temperature oxidation easily causes the agglomeration of noble metal on the surface of the catalyst, thereby causing the permanent deactivation of the noble metal catalyst.
Disclosure of Invention
The invention aims to provide an organic waste gas catalytic combustion treatment device capable of solving the problem that when the catalytic combustion device is used for treating VOCs waste gas, the purification efficiency is often reduced due to the short-term deactivation of a noble metal catalyst. Noble metal catalysts are expensive and frequent replacement of the catalyst is not economically viable; most enterprises have relatively miscellaneous waste gas components, and the problem that the noble metal catalyst is inactivated transiently cannot be radically avoided by easily-polymerized substances such as styrene and the like.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
An organic waste gas catalytic combustion treatment device capable of solving the short-term deactivation of a catalyst comprises a framework, a heat preservation layer structure, a catalytic layer fixing frame, a heating device, an airflow inlet and an airflow outlet; the catalytic layer fixing frame and the heating device are arranged in the framework and the heat preservation structure, and the heating device is used for heating a catalyst on the catalytic layer fixing frame; the catalytic layer fixing frame is divided into an upper catalytic layer and a lower catalytic layer, the upper catalytic layer is a pre-catalytic layer and is used for placing a pre-catalytic catalyst, the lower catalytic layer is a catalytic layer and is used for placing an organic waste gas catalytic reaction catalyst.
Further, the upper catalytic layer adopts the thick film heating layer as upper catalytic layer fixed plate, one side of thick film heating layer is supported fixedly through the grid, the thick film heating layer is used for realizing the rapid heating of upper catalyst.
The lower catalytic layer adopts a grid as a lower catalytic layer fixing plate.
And a natural gas heat exchanger or an electric heating device is arranged below the lower catalytic layer fixing plate.
Further, a preheating heat exchanger is arranged at the lower part of the organic waste gas catalytic combustion treatment device, and is used for exchanging heat between the gas at the gas flow outlet and the untreated waste gas entering the gas flow inlet.
Further, a temperature measuring element is arranged on the catalytic layer fixing frame.
The burner natural gas interface, the pressure relief opening and the natural gas combustion discharge opening of the natural gas heat exchanger penetrate through the framework and the heat preservation layer structure.
Further, thick film heating layers are arranged above and below the upper catalytic layer.
Compared with the prior art, the invention has the beneficial effects that:
The invention can solve the problem of the reduction of the overall purification efficiency caused by the polymerization and carbon deposition of VOCs in the use process of catalytic combustion; meanwhile, the high-efficiency regeneration of the pre-catalytic layer is realized through thick film heating. The measures can obviously improve the purification efficiency and the service life of the catalytic combustion device.
Drawings
Fig. 1: the organic waste gas catalytic combustion treatment device capable of solving the short-term deactivation of the catalyst is structurally schematic.
Fig. 2: the side view structure schematic diagram of the organic waste gas catalytic combustion treatment device capable of solving the short-term deactivation of the catalyst.
In the figure: the device comprises a 1-temperature measuring element, a 2-pre-catalytic layer, a 3-thick film heating layer, a 4-catalytic layer, a 5-grid, a 6-natural gas heat exchanger, a 7-pressure relief opening, an 8-pre-heating heat exchanger, a 9-air inlet, a 10-air outlet, a 11-burner natural gas interface, a 12-framework and heat preservation structure and a 13-natural gas combustion discharge opening.
Detailed Description
The invention will be further illustrated with reference to specific examples.
An organic waste gas catalytic combustion treatment device capable of solving the short-term deactivation of a catalyst comprises a framework, a heat preservation layer structure 12, a catalytic layer fixing frame, a heating device, an air flow inlet 9 and an air flow outlet 10; the left side of the framework and heat preservation structure 12 is provided with an air flow inlet 9, the right side of the framework and heat preservation structure 12 is provided with an air flow outlet 10, the catalytic layer fixing frame and the heating device are arranged in the framework and heat preservation structure 12, and the heating device is used for heating a catalyst on the catalytic layer fixing frame; the catalytic layer fixing frame is divided into an upper catalytic layer and a lower catalytic layer, the upper catalytic layer is a pre-catalytic layer 2, a pre-catalytic catalyst is placed, the lower catalytic layer is a catalytic layer 4, and an organic waste gas catalytic reaction catalyst is placed.
The catalyst is arranged in layers, the pre-catalytic layer 2 is a catalyst with low noble metal content/high rare earth catalyst promoter content, the catalytic layer 4 is a catalyst with high noble metal content and high dispersibility, the low catalyst content, the high catalyst content and the high catalyst content mean that the upper catalyst is compared with the lower catalyst, the dosage of the upper catalyst is less than that of the lower catalyst, and the unit volume cost is lower than that of the lower catalyst.
The catalytic combustion device air flow passes through the pre-catalytic layer 2 and then enters the catalytic layer. When the easily polymerized pollutants enter the catalytic combustion device, polymerization can often occur in advance when the effective catalytic temperature (250 ℃) is not reached, such as polystyrene is generated by styrene, and the polystyrene cannot be catalyzed at the temperature at which the styrene can be catalyzed in the follow-up process, so that the efficiency of catalyzing VOCs waste gas in the follow-up process is affected. The arrangement of the upper catalyst can protect the lower catalyst, and polymerization can be carried out in the low-temperature area of the upper catalyst.
The upper catalytic layer adopts thick film heating layer 3 as upper catalytic layer fixed plate, one side of thick film heating layer is supported fixedly through grid 5, thick film heating layer 3 is used for realizing the rapid heating of upper catalyst.
The thick film heating layer 3 is formed by sintering a thick film circuit, a low-temperature ceramic insulating coating, a sensing layer and a high-temperature ceramic insulating coating. The thick film heating layer 3 can rapidly, effectively and accurately heat the upper catalyst, and has the characteristics of good heat conduction performance, large heat dissipation area and high safety performance.
The thick film heating layer 3 is periodically started to oxidize and regenerate the upper catalyst at high temperature, and the upper catalyst can effectively protect the lower catalyst, so that the purification efficiency of the catalytic combustion device can be continuously ensured. Because the amount of the upper catalyst to be heated is relatively small, the noble metal content of the upper catalyst is relatively low, the high temperature resistance is good, the energy consumption of high temperature oxidation regeneration can be remarkably reduced, the accurate directional regeneration is realized, and the permanent deactivation caused by the catalyst agglomeration is avoided.
The lower catalytic layer adopts a grid 5 as a lower catalytic layer fixing plate.
And a natural gas heat exchanger 6 or an electric heating device is arranged below the lower catalytic layer fixing plate.
A preheating heat exchanger 8 is also arranged at the lower part of the organic waste gas catalytic combustion treatment device, and the preheating heat exchanger 8 is used for exchanging heat between the gas at the gas flow outlet 10 and the untreated waste gas which is going to enter the gas flow inlet 9.
The catalytic layer fixing frame is provided with a temperature measuring element 1.
The burner natural gas interface 11, the pressure relief opening 7 and the natural gas combustion discharge opening 13 of the natural gas heat exchanger 6 penetrate through the framework and the heat preservation layer structure 12.
For the high-carbon pollutants or easily polymerized pollutants in the waste gas component with higher concentration, thick film heating layers can be arranged on the pre-catalytic layer 2 and below the pre-catalytic layer.
The present invention is not limited to the preferred embodiments, and any simple modification, equivalent replacement, and improvement made to the above embodiments by those skilled in the art without departing from the technical scope of the present invention, will fall within the scope of the present invention.
Claims (6)
1. An organic waste gas catalytic combustion treatment device capable of solving the short-term deactivation of a catalyst is characterized in that: comprises a framework, a heat preservation layer structure, a catalytic layer fixing frame, a heating device, an air flow inlet and an air flow outlet; the catalytic layer fixing frame and the heating device are arranged in the framework and the heat preservation structure, and the heating device is used for heating a catalyst on the catalytic layer fixing frame; the catalytic layer fixing frame is divided into an upper catalytic layer and a lower catalytic layer, the upper catalytic layer is a pre-catalytic layer, a pre-catalytic catalyst is placed, the lower catalytic layer is a catalytic layer, an organic waste gas catalytic reaction catalyst is placed, and the precious metal content of the pre-catalytic layer is less than that of the catalytic layer; the upper catalytic layer adopts a thick film heating layer as an upper catalytic layer fixing plate, one side of the thick film heating layer is supported and fixed through a grid, the thick film heating layer is formed by sintering a thick film circuit, a low-temperature ceramic insulating coating, a sensing layer and a high-temperature ceramic insulating coating, and the thick film heating layer is used for realizing rapid heating of an upper catalyst; the lower catalytic layer adopts a grid as a lower catalytic layer fixing plate.
2. The catalytic combustion treatment device for organic waste gas capable of solving the short-term deactivation of catalyst according to claim 1, wherein: and a natural gas heat exchanger or an electric heating device is arranged below the lower catalytic layer fixing plate.
3. The catalytic combustion treatment device for organic waste gas capable of solving the short-term deactivation of catalyst according to claim 1, wherein: the lower part of the organic waste gas catalytic combustion treatment device is also provided with a preheating heat exchanger, and the preheating heat exchanger is used for exchanging heat between gas at the gas flow outlet and untreated waste gas entering the gas flow inlet.
4. The catalytic combustion treatment device for organic waste gas capable of solving the short-term deactivation of catalyst according to claim 1, wherein: and a temperature measuring element is arranged on the catalytic layer fixing frame.
5. The catalytic combustion treatment device for organic waste gas capable of solving the short-term deactivation of catalyst according to claim 1, wherein: the burner natural gas interface, the pressure relief opening and the natural gas combustion discharge opening of the natural gas heat exchanger penetrate through the framework and the heat preservation layer structure.
6. The catalytic combustion treatment device for organic waste gas capable of solving the short-term deactivation of catalyst according to claim 1, wherein: and thick film heating layers are arranged above and below the upper catalytic layer.
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| CN201910835775.3A CN110469859B (en) | 2019-09-05 | 2019-09-05 | Organic waste gas catalytic combustion treatment device capable of solving short-term deactivation of catalyst |
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| CN201910835775.3A CN110469859B (en) | 2019-09-05 | 2019-09-05 | Organic waste gas catalytic combustion treatment device capable of solving short-term deactivation of catalyst |
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| CN110469859B true CN110469859B (en) | 2024-10-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111054275A (en) * | 2019-11-28 | 2020-04-24 | 广州维港环保科技有限公司 | Catalytic reaction device and catalytic reaction system thereof |
| CN111780140B (en) * | 2020-07-30 | 2020-12-22 | 南京大学环境规划设计研究院股份公司 | Heat accumulating type catalytic combustion device for VOCs treatment |
| CN111957203A (en) * | 2020-08-26 | 2020-11-20 | 江苏蓝创环保科技有限公司 | Waste gas catalytic oxidation device and method |
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| CN102188939A (en) * | 2010-03-18 | 2011-09-21 | 中国石油化工股份有限公司 | Fluidized bed recycling equipment of low-carbon catalyst and regeneration method thereof |
| CN204880159U (en) * | 2015-08-03 | 2015-12-16 | 广东俐峰环保科技有限公司 | Catalystic combustion device |
| CN208519827U (en) * | 2018-06-05 | 2019-02-19 | 杭州易上环境服务有限公司 | A kind of kitchen fumes exhaust gas centralized processor |
| CN211575147U (en) * | 2019-09-05 | 2020-09-25 | 南京大学环境规划设计研究院股份公司 | Organic waste gas catalytic combustion treatment device capable of solving transient inactivation of catalyst |
Family Cites Families (3)
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| JP3491424B2 (en) * | 1996-01-26 | 2004-01-26 | ヤマハ発動機株式会社 | Ship engine |
| EP1541820A3 (en) * | 2003-12-11 | 2005-06-22 | Volkswagen Aktiengesellschaft | Internal combustion engine with an exhaust gas purifying apparatus and method of operation of an internal combustion engine |
| JP5769708B2 (en) * | 2010-06-30 | 2015-08-26 | エヌ・イーケムキャット株式会社 | Exhaust gas purification apparatus and exhaust gas purification method using selective reduction catalyst |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188939A (en) * | 2010-03-18 | 2011-09-21 | 中国石油化工股份有限公司 | Fluidized bed recycling equipment of low-carbon catalyst and regeneration method thereof |
| CN204880159U (en) * | 2015-08-03 | 2015-12-16 | 广东俐峰环保科技有限公司 | Catalystic combustion device |
| CN208519827U (en) * | 2018-06-05 | 2019-02-19 | 杭州易上环境服务有限公司 | A kind of kitchen fumes exhaust gas centralized processor |
| CN211575147U (en) * | 2019-09-05 | 2020-09-25 | 南京大学环境规划设计研究院股份公司 | Organic waste gas catalytic combustion treatment device capable of solving transient inactivation of catalyst |
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