CN110732239A - Catalytic oxidation process for high-concentration organic gas tail gas - Google Patents
Catalytic oxidation process for high-concentration organic gas tail gas Download PDFInfo
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- CN110732239A CN110732239A CN201910874393.1A CN201910874393A CN110732239A CN 110732239 A CN110732239 A CN 110732239A CN 201910874393 A CN201910874393 A CN 201910874393A CN 110732239 A CN110732239 A CN 110732239A
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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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- 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
- B01D53/343—Heat recovery
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Abstract
The invention relates to the technical field of tail gas treatment, in particular to a catalytic oxidation process method for high-concentration organic gas tail gases, namely high-concentration organic gas tail gas catalytic oxidation process methods.
Description
Technical Field
The invention relates to the technical field of tail gas treatment, in particular to a catalytic oxidation process method for high-concentration organic gas tail gases.
Background
In the existing industrial production process, tail gas is discharged in the production of gas-solid phase catalytic oxidation chemical products and the coating production process of light industry, and the tail gas contains quantitative o-xylene, toluene, benzene, butane, butadiene, propylene, acrylic acid, acetic acid and the like which can generate organic matters.
For the above problems, new technical solutions need to be proposed.
Disclosure of Invention
The invention aims to utilize secondary catalytic oxidation to enable high-concentration organic gas tail gas to react to generate nontoxic and harmless gas which can be directly discharged without polluting the environment. The invention realizes the aim through the following technical scheme:
catalytic oxidation process for the tail gas of high-concentration organic gas, which is characterized by comprising the steps of, firstly, carrying out heat exchange on the tail gas of high-concentration organic gas, then heating to reach the catalytic oxidation condition, reacting the tail gas of high-concentration organic gas to generate nitrogen, oxygen, carbon dioxide and water under the action of a catalyst to reach the atmospheric emission standard, wherein the method comprises the specific steps of,
① passing the high-concentration organic gas tail gas at normal temperature through a gas flow guider;
②, exchanging heat between the high-concentration organic gas tail gas at normal temperature and the high-temperature tail gas after secondary catalytic oxidation treatment in the gas guider through a heat exchanger, heating the exchanged high-concentration organic gas tail gas to 250-300 ℃, and then feeding the high-concentration organic gas tail gas into a catalytic oxidation reactor, and controlling the reaction gas to be maintained at 500 ℃;
③, cooling by step reaction, namely , reacting the high-concentration organic gas tail gas with a catalyst to remove 40-50% of the organic gas tail gas, and cooling the high-temperature gas after reaction to the reaction temperature required by the catalyst in the second step by generating steam through a finned tube evaporator;
④ step two, catalytic oxidation is carried out on the cooled gas again, and when the organic matter treatment rate in the organic gas tail gas reaches more than or equal to 98%, the reacted gas is controlled at about 350-420 ℃:
⑤ the high temperature gas generated in the previous step is heat exchanged with the untreated high concentration organic gas tail gas through the initial heat exchanger again, and the high temperature gas is finally cooled to 100-120 ℃ and then discharged through the gas flow guider.
In embodiments, the gas director employs a four-channel gas director.
In examples, noble metal platinum and palladium honeycomb structured catalyst is used in the process.
In examples, the equipment involved in the process was all at rest during normal use.
In cases, a heating device is needed at the front end of the catalyst in step .
The invention has the following beneficial effects:
1. the invention treats the high-concentration organic gas tail gas into harmless substances through the catalytic action of the catalyst, does not generate waste residues and waste water, and is beneficial to saving the cost and improving the enterprise benefit.
2. The invention can generate steam with different grades according to the requirement by fully utilizing the heat in the tail gas treatment process, thereby realizing the repeated cyclic utilization of energy and saving energy.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those embodiments can be easily implemented by those having ordinary skill in the art to which the present invention pertains. However, the present invention may be embodied in many different forms and is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, components not connected to the present invention will be omitted from the drawings.
catalytic oxidation process for the tail gas of high-concentration organic gas, which is characterized by comprising the steps of, firstly, carrying out heat exchange on the tail gas of high-concentration organic gas, then heating to reach the catalytic oxidation condition, reacting the tail gas of high-concentration organic gas to generate nitrogen, oxygen, carbon dioxide and water under the action of a catalyst to reach the atmospheric emission standard, wherein the method comprises the specific steps of,
① passing the high-concentration organic gas tail gas at normal temperature through a gas flow guider;
②, exchanging heat between the high-concentration organic gas tail gas at normal temperature and the high-temperature tail gas after secondary catalytic oxidation treatment in the gas guider through a heat exchanger, heating the exchanged high-concentration organic gas tail gas to 250-300 ℃, and then feeding the high-concentration organic gas tail gas into a catalytic oxidation reactor, and controlling the reaction gas to be maintained at 500 ℃;
③, cooling by step reaction, namely , heating air entering the tail gas treatment device through a fan by a heating device in advance to improve the temperature of the catalyst, closing the fan when the inlet temperature of the catalyst reaches 250-300 ℃, reacting the high-concentration organic gas tail gas with the catalyst to remove 40% -50% of the organic gas tail gas, and cooling the high-temperature gas after reaction to the reaction temperature required by the catalyst in the second step by generating steam through a finned tube evaporator;
④ step two, catalytic oxidation is carried out on the cooled gas again, and when the organic matter treatment rate in the organic gas tail gas reaches more than or equal to 98%, the reacted gas is controlled at about 350-420 ℃;
⑤ the high temperature gas generated in the previous step is heat exchanged with the untreated high concentration organic gas tail gas through the initial heat exchanger again, and the high temperature gas is finally cooled to 100-120 ℃ and then discharged through the gas flow guider.
Preferably, as possible embodiments, the gas deflector adopts a four-channel gas deflector, so that the deflection pressure or the tail gas air volume fluctuation cannot be caused after the system is fixed during operation, and the normal operation of the production process is ensured.
Preferably, as implementable modes, the process method adopts the noble metal platinum and palladium honeycomb structured catalyst, has the characteristics of long service life and high operation flexibility, and can ensure that the concentration of organic matters and CO in the purified tail gas discharged from the outlet of the catalyst reaches the emission requirement of the characteristic pollutants of waste organic matters and emission limit expressed in petrochemical industry pollutant emission standard GB31571-2015 under the condition specified by the design working condition.
Preferably, as possible embodiments, the equipment involved in the process method is all in a static state during normal use, the operation process can be automatically controlled, and the operation is reliable.
Preferably, as possible embodiments, a heating device is needed at the front end of the catalyst in step , and the normal production process does not need supplementary energy.
Claims (5)
1, high-concentration organic gas tail gas catalytic oxidation process method, characterized in that, the method comprises the steps of, firstly, carrying out heat exchange to the high-concentration organic gas tail gas, then heating to reach the catalytic oxidation condition, under the action of catalyst, making the high-concentration organic gas tail gas react to generate nitrogen, oxygen, carbon dioxide and water, reaching the atmospheric emission standard, the method comprises the specific steps of,
① passing the high-concentration organic gas tail gas at normal temperature through a gas flow guider;
②, exchanging heat between the high-concentration organic gas tail gas at normal temperature and the high-temperature tail gas after secondary catalytic oxidation treatment in the gas guider through a heat exchanger, heating the exchanged high-concentration organic gas tail gas to 250-300 ℃, and then feeding the high-concentration organic gas tail gas into a catalytic oxidation reactor, and controlling the reaction gas to be maintained at 500 ℃;
③, cooling by step reaction, namely , reacting the high-concentration organic gas tail gas with a catalyst to remove 40-50% of the organic gas tail gas, and cooling the high-temperature gas after reaction to the reaction temperature required by the catalyst in the second step by generating steam through a finned tube evaporator;
④ step two, catalytic oxidation is carried out on the cooled gas again, and when the organic matter treatment rate in the organic gas tail gas reaches more than or equal to 98%, the reacted gas is controlled at about 350-420 ℃;
⑤ the high temperature gas generated in the previous step is heat exchanged with the untreated high concentration organic gas tail gas through the initial heat exchanger again, and the high temperature gas is finally cooled to 100-120 ℃ and then discharged through the gas flow guider.
2. The catalytic oxidation process of kinds of high concentration organic gas tail gases, according to claim 1, wherein the gas guiding device is a four-channel gas guiding device.
3. The catalytic oxidation process of kinds of high-concentration organic gas tail gases, according to claim 2, wherein a noble metal structured catalyst of platinum and palladium is used in the process.
4. The catalytic oxidation process of kinds of high-concentration organic tail gases as claimed in claim 3, wherein the equipment involved in the process is all in a static state during normal use.
5. The catalytic oxidation process of kinds of high concentration organic gases as claimed in claim 4, wherein a heating device is installed at the front end of the catalyst in step .
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| CN201910874393.1A CN110732239A (en) | 2019-09-17 | 2019-09-17 | Catalytic oxidation process for high-concentration organic gas tail gas |
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| CN201910874393.1A CN110732239A (en) | 2019-09-17 | 2019-09-17 | Catalytic oxidation process for high-concentration organic gas tail gas |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000068616A1 (en) * | 1999-05-05 | 2000-11-16 | Solo Energy Corporation | Catalytic converter arrangement |
| CN102913919A (en) * | 2011-08-01 | 2013-02-06 | 中国石油化工股份有限公司 | Method for purifying high-concentration organic waste gas |
| CN206121521U (en) * | 2016-10-25 | 2017-04-26 | 天津市华邦科技发展有限公司 | Phthalic anhydride tail gas catalytic oxidation reactor |
| CN107433127A (en) * | 2017-08-01 | 2017-12-05 | 云南省贵金属新材料控股集团有限公司 | A kind of method and device of low heat value industrial tail gas catalyzing, oxidizing and purifying and energy utilization |
| CN207708834U (en) * | 2017-11-21 | 2018-08-10 | 南京钟腾化工有限公司 | Normal butane method produces the exhaust treatment system of cis-butenedioic anhydride |
-
2019
- 2019-09-17 CN CN201910874393.1A patent/CN110732239A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000068616A1 (en) * | 1999-05-05 | 2000-11-16 | Solo Energy Corporation | Catalytic converter arrangement |
| CN102913919A (en) * | 2011-08-01 | 2013-02-06 | 中国石油化工股份有限公司 | Method for purifying high-concentration organic waste gas |
| CN206121521U (en) * | 2016-10-25 | 2017-04-26 | 天津市华邦科技发展有限公司 | Phthalic anhydride tail gas catalytic oxidation reactor |
| CN107433127A (en) * | 2017-08-01 | 2017-12-05 | 云南省贵金属新材料控股集团有限公司 | A kind of method and device of low heat value industrial tail gas catalyzing, oxidizing and purifying and energy utilization |
| CN207708834U (en) * | 2017-11-21 | 2018-08-10 | 南京钟腾化工有限公司 | Normal butane method produces the exhaust treatment system of cis-butenedioic anhydride |
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