Treating method of lacquer spraying waste gas

A waste gas, dry process technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of long process, clogging, limited absorption effect, etc., to achieve the effect of zero emission

Inactive Publication Date: 2006-10-18
刘贵明
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method adopts positive pressure absorption, and the oil in the exhaust gas will contaminate the exhaust fan, causing blockage in severe cases; after the exhaust gas is absorbed by washing oil, it must also undergo carbon particle absorption and wet absorption, which is a long process and the absorption effect is limited.

Method used

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  • Treating method of lacquer spraying waste gas
  • Treating method of lacquer spraying waste gas

Examples

Experimental program
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Embodiment Construction

[0016] Examples are attached figure 1 As shown in the process of treating the toxic waste gas produced in the painting process, the waste gas is pumped from the paint spraying room 1 into the packing absorption tower 3, and is circulated and absorbed by washing oil under negative pressure: that is, the washing oil is pumped from the oil storage tank 4 by the oil pump 2 The annular oil pipe 8 pumped to the top of the tower is sprayed out from the nozzle 7, contacts with the waste gas entering from the bottom of the tower, and increases the contact with the ceramic ring packing 6 to achieve the purpose of mass transfer, remove most of the toxic components or pass through the sieve plate 5 Flow back to the oil storage tank 4; the absorbed waste gas is extracted by the fan 9, enters the activated carbon adsorber 10 and the activated clay adsorber 11 in turn, and finally enters the glass fiber filter 12, and the tiny liquid droplets in the exhaust gas are filtered out and discharged...

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Abstract

The treating method of lacquer spraying waste gas includes the first chemical absorption with wash oil as absorbent inside an absorption tower at negative pressure state, and the subsequent dry physical adsorption and filtering at positive pressure state to eliminate toxic components in the waste gas. The technological process includes the following steps: circular absorption of waste gas from spray booth with absorbent in the absorption tower to eliminate most toxic components; successive adsorption in active carbon adsorber and active white clay adsrober; and final filtering with glass fiber filter or coke filter to filter off micro liquid drop from the waste gas before the gas is exhausted to atmosphere. The treating method of lacquer spraying waste gas can recover benzene, alcohol, acetone, etc. from waste gas for reuse while purifying waste gas, and the used wash oil active carbon and white clay may be activated easily.

Description

technical field [0001] The invention relates to an environmental protection method, in particular to a method for treating toxic waste gas produced in the painting process. Background technique [0002] In modern life, cars have become a means of transportation commonly used by people. In the production and maintenance of automobiles, the outer shell of the car must be sprayed with paint-based coatings. This painting process will produce a large amount of exhaust gas. Due to the use of paint solvent banana water, there are toxic substances such as benzene, acetone, ethyl acetate, and ethylene glycol ether in the exhaust gas. These exhaust gases will cause harm to human health. This type of exhaust is also produced in other painting processes like automobiles. In recent years, people have continued to study the treatment methods for the above-mentioned waste gas. Chinese patent application No. 02115277.2 "Chemical Toxic Gas Pollution Control and Recovery Method and System...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/00
Inventor 刘贵明
Owner 刘贵明
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