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VOCs waste gas treatment method

A technology for waste gas treatment and waste gas, which is applied in separation methods, chemical instruments and methods, air quality improvement, etc., and can solve problems such as low absorption rate and non-standard discharge of tail gas

Inactive Publication Date: 2016-08-10
河北美邦工程科技股份有限公司
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Problems solved by technology

However, the atmospheric pressure tail gas absorption and desorption method has a low absorption rate, and the absorbed tail gas cannot be discharged up to the standard, and the use of activated carbon to treat the residual gas up to the standard has the above shortcomings. The normal-pressure VOCs exhaust gas recovery efficiency of the gas volume, so that the tail gas can meet the emission standards and reduce environmental pollution, is an urgent problem that VOCs production and use enterprises in the chemical and pharmaceutical industries need to solve

Method used

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Embodiment 1

[0023] Embodiment 1 A high-concentration, medium-volume ethyl acetate waste gas recovery treatment method comprises the following steps:

[0024] (1) Ethyl acetate waste gas collection

[0025] Collect the ethyl acetate waste gas discharged from each discharge point to obtain high-concentration and medium-volume ethyl acetate waste gas. The ethyl acetate content in the waste gas is 10g / L, and the gas volume is 10000Nm 3 / h.

[0026] (2) Absorption unit

[0027] The ethyl acetate waste gas collected in step (1) is sent from the bottom to the absorption tower for absorption, and the absorbent is sent from the top. Under the condition of a temperature of 30°C and normal pressure, the ethyl acetate waste gas and the absorbent are subjected to gas-liquid countercurrent contact , ethyl acetate is dissolved in the absorbent to obtain an ethyl acetate enriched solution, and the residual gas after absorption is discharged from the top of the tower, and the concentration of ethyl acet...

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Abstract

The invention discloses a VOCs waste gas treatment method .High-concentration and low-medium-volume normal-pressure VOCs waste gas is discharged in the production process of medicine industry, chemical industry and other industries, and the waste gas is treated through the following steps of waste gas collecting, absorbing, desorbing, concentrating through a rotating wheel, recovering to obtain VOCs organic solvent, and purifying to achieve gas emission up to standard .By means of the method, absorbent can be recycled, emission of treated gas is up to standard, the recovery rate of VOCs is larger than or equal to 99%, the purity is larger than or equal to 95%, economic benefits are improved, and clean production is achieved .

Description

technical field [0001] The invention relates to a waste gas treatment method, in particular to a VOCs waste gas treatment method, and belongs to the technical field of clean production in the chemical industry. Background technique [0002] Volatile organic compounds (VOCs) waste gas is a common pollutant discharged by petrochemical, pharmaceutical, printing and other industries. It is toxic and pollutes the atmospheric environment, but it has economic recovery value. Therefore, activated carbon adsorption and absorbent absorption and desorption methods are commonly used Recycling. The activated carbon adsorption cycle is short, the adsorption and desorption is frequent, the service life of the adsorbent activated carbon is short, and the invalid activated carbon is listed as solid hazardous waste. The absorption and desorption method does not pollute the environment because the absorbent can be recycled, and has no impact on VOCs. A green and efficient VOCs exhaust gas rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/02
CPCB01D53/02B01D53/14B01D53/1425B01D2253/108Y02A50/20
Inventor 尹更昌赵旭程建锋焦晓会邢建波
Owner 河北美邦工程科技股份有限公司
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