Graded desorption method for volatile organic compound adsorbed active carbon

A technology of volatile organic compounds and activated carbon, which is applied in the field of exhaust gas treatment and the hierarchical desorption of activated carbon for adsorption of volatile organic compounds. It can solve the problem of large fluctuations in the concentration of volatile organic compounds in the desorption gas, the mismatch between the desorption process and the combustion process, and the cost of operation and maintenance. Advanced problems, to achieve the effect of reducing treatment costs and operation and maintenance costs, reducing operation and maintenance costs, and improving desorption efficiency and desorption rate

Pending Publication Date: 2020-05-22
秦皇岛格瑞因环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a hierarchical desorption method for activated carbon that adsorbs volatile organic compounds, which can solve the problem of mismatch between the desorption process and the combustion process, incomplete desorption, large fluctuations in the concentration of volatile organic compounds in the desorption gas, and exhaust gas. Exceeding the standard and high operation and maintenance costs

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  • Graded desorption method for volatile organic compound adsorbed active carbon
  • Graded desorption method for volatile organic compound adsorbed active carbon

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Embodiment 1

[0053] The activated carbon adsorption method for adsorbing volatile organic compounds of the present invention is adopted to desorb the saturated activated carbon adsorption device. The activated carbon adsorption device is filled with conventional activated carbon adsorption materials, the number of periods is 4 periods, the temperature range of the desorbed gas is 60°C to 160°C, and the linear velocity of the desorbed gas in the activated carbon is 0.2-0.3m / s. The temperature of the gas is achieved by mixing the high-temperature gas discharged from the combustion device with the room temperature air in different proportions through the temperature online instrument and the automatic valve.

[0054] The temperature of the desorption gas fed in the first period (starting the furnace) is 60-90°C, the desorption time is 20min-30min, and the concentration of volatile organic compounds desorbed from the activated carbon adsorption device is not more than 500mg / m 3 , although the ...

Embodiment 2

[0059] The activated carbon adsorption method for adsorbing volatile organic compounds of the present invention is adopted to desorb the saturated activated carbon adsorption device. The activated carbon adsorption device is filled with conventional activated carbon adsorption materials, the number of periods is 5 periods, the temperature range of the desorbed gas is 60°C to 160°C, and the linear velocity of the desorbed gas in the activated carbon is 0.2-0.3m / s. The temperature of the gas is achieved by mixing the high-temperature gas discharged from the combustion device with the room temperature air in different proportions through the temperature online instrument and the automatic valve.

[0060] The temperature of the desorption gas fed in the first period (starting the furnace) is about 60-90°C, the desorption time is 20min-30min, and the concentration of volatile organic compounds desorbed from the activated carbon adsorption device is not more than 500mg / m 3 , although ...

Embodiment 3

[0065] The activated carbon adsorption method for adsorbing volatile organic compounds of the present invention is adopted to desorb the saturated activated carbon adsorption device. The activated carbon adsorption device is filled with activated carbon loaded with copper catalyst. The copper loading is 0.2% (mass percentage). When the temperature rises above 120°C, it can partially catalyze the oxidation of volatile organic compounds. The number of periods is 4 periods, The temperature range of the desorbed gas is 60℃~160℃, the linear velocity of the desorbed gas in the activated carbon is 0.2-0.3m / s, the temperature of the desorbed gas is adjusted by the temperature online instrument and the automatic valve, and the high temperature gas discharged from the combustion device and the Room temperature air is mixed in different proportions.

[0066] The temperature of the desorption gas fed in the first period (starting the furnace) is about 60-90°C, the desorption time is 20min...

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Abstract

The invention discloses a graded desorption method for volatile organic compound adsorbed active carbon. The graded desorption method comprises the following steps: carrying out time-phased stepped heating desorption on the volatile organic compound adsorbed active carbon, and according to factors like types, concentrations and properties of volatile organic compounds in waste gas, determining thenumber of time periods and desorption temperature and time of each time period. According to the invention, active carbon is fully and thoroughly desorbed; meanwhile, the concentration of desorbed waste gas can be more balanced; the impact caused by large concentration change on a treatment system is avoided; and the problems of mismatching between a desorption process and a combustion process, incomplete desorption, large fluctuation of the concentration of the volatile organic compounds in desorbed gas, excessive exhaust and high operation and maintenance cost can be solved.

Description

technical field [0001] The invention relates to the field of environmental protection, and to waste gas treatment, in particular to a graded desorption method for activated carbon that adsorbs volatile organic substances. Background technique [0002] With the improvement of environmental protection requirements in our country, the emission standards of exhaust gas produced by various industries are becoming increasingly strict, requiring the treatment of various pollutants in exhaust gas. At present, activated carbon is usually used to adsorb the volatile organic compounds contained in the waste gas, and then the hot air desorbs to obtain concentrated waste gas, and then undergoes combustion treatment to convert the volatile organic compounds into harmless carbon dioxide and water, so that the volatile organic compounds in the waste gas can be completely eliminated. deal with. [0003] The existing desorption method of activated carbon for adsorbing volatile organic compou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01D53/02F23G7/07F23G5/44
CPCB01J20/3416B01J20/3483B01D53/02F23G7/07F23G5/44B01D2259/4009B01D2257/708
Inventor 吴举叶帆胡晓光陈强陈春苗吕明亮
Owner 秦皇岛格瑞因环境工程有限公司
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