Treatment method of chlorine-containing volatile organic compound waste gas

A technology of volatile organic compounds and treatment methods, applied in the direction of gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of secondary pollution, long absorption time, etc., and achieve good recycling, low cost, and high absorption performance Effect

Pending Publication Date: 2021-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the absorbent uses amide substances, which will cause secondary pollution and take a long time to absorb

Method used

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  • Treatment method of chlorine-containing volatile organic compound waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh choline chloride and ethylene glycol according to a molar ratio of 1:2 and add them to the reactor, stir at 80°C and 150r / min for 1 hour, then cool to room temperature to obtain a transparent choline chloride / ethylene glycol compound solvent. Absorb the gas containing chloroform and the above composite solvent in the absorption tower, control the absorption temperature to 25°C, the absorption pressure to 0.1MPa, and the liquid-gas ratio to 4L / m 3 . After the absorption reaches equilibrium, the weight before and after absorption is detected by gravimetric method, and the chloroform absorbed by each gram of absorbent is calculated to be 147mg.

[0024] The rich absorbent with absorption balance is regenerated by heating, the heating temperature is 100°C, the pressure is 0.1MPa, and the regeneration time is 1h. After 10 cycles of absorption and desorption, the regenerated absorbent was used to absorb chloroform-containing gas under the same operating conditions, an...

Embodiment 2

[0026] Weigh choline chloride and ethylene glycol according to a molar ratio of 1:4 and add them to the reactor, stir at 60°C and 150r / min for 1 hour, then cool to room temperature to obtain a transparent choline chloride / ethylene glycol compound solvent. Absorb the gas containing chloroform and the above composite solvent in the absorption tower, control the absorption temperature to 15°C, the absorption pressure to 0.3MPa, and the liquid-gas ratio to 5L / m 3 . After the absorption reaches equilibrium, the weight before and after absorption is detected by gravimetric method, and the chloroform absorbed by each gram of absorbent is calculated to be 217 mg.

[0027] The rich absorbent with absorption balance is regenerated by heating and reducing pressure, the heating temperature is 120°C, the pressure is 0.01MPa, and the regeneration time is 20min. After 10 cycles of absorption and desorption, the regenerated absorbent was used for the absorption of gas containing chloroform ...

Embodiment 3

[0029] Weigh choline chloride and ethylene glycol at a molar ratio of 1:6 and add them to the reactor, stir at 100°C and 150r / min for 1 hour, then cool to room temperature to obtain a transparent choline chloride / ethylene glycol compound solvent. Absorb the gas containing chloroform and the above composite solvent in the absorption tower, control the absorption temperature to 40°C, the absorption pressure to 0.1MPa, and the liquid-gas ratio to 3L / m 3 . After the absorption reaches equilibrium, the weight before and after absorption is detected by gravimetric method, and the chloroform absorbed by each gram of absorbent is calculated to be 115 mg.

[0030] The rich absorbent with absorption balance is decompressed and regenerated, the pressure is 0.01MPa, and the desorption time is 30min. After 10 cycles of absorption and desorption, the regenerated absorbent was used for the absorption of gas containing chloroform under the same operating conditions, and the amount of chloro...

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Abstract

The invention relates to a treatment method of chlorine-containing volatile organic compound waste gas, which comprises the following steps: the chlorine-containing volatile organic compound waste gas is contacted with an absorbent, the absorbent is a choline chloride and polyhydric alcohol composite solvent, regeneration is carried out after absorption balance, and the regenerated absorbent is recycled. The choline chloride and polyhydric alcohol composite solvent is used as the chlorine-containing organic matter waste gas absorbent, chlorine-containing VOCs can be rapidly and effectively absorbed, and the absorption efficiency is high.

Description

technical field [0001] The invention belongs to the field of gas absorption, and in particular relates to a treatment method for chlorine-containing volatile organic compound waste gas. Background technique [0002] Chlorinated volatile organic compounds (chlorinated VOCs) are a class of pollutants commonly found in environmental media, including chlorinated alkanes, chlorinated olefins, and chlorinated aromatics. Generally speaking, these substances mainly come from petrochemical, printing, pharmaceutical and other industries. The volatilization of chlorine-containing VOCs will cause air pollution and are considered as persistent pollutants. Most of them are insoluble in water and difficult to be biodegraded in the environment. , the chlorine-containing VOCs emitted into the atmosphere will destroy the ozone layer, form photochemical smog and global warming, and have "three effects" on the human body. Therefore, chlorine-containing VOCs are restricted by strict laws and reg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1487B01D53/1493B01D53/1425B01D2252/504B01D2257/2064
Inventor 张明美刘洋王新赵磊刘忠生
Owner CHINA PETROLEUM & CHEM CORP
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