Paint-spraying waste gas integrated treatment method

Abstract

The invention discloses a paint-spraying waste gas integrated treatment method. Waste gas produced in a paint-spraying process and containing paint mists and VOC is collected by a collecting hood, then is conveyed to a treatment device by a conveying pipeline and under the negative pressure action of a draught fan, and is up to standard for discharging after successively undergoing impact type dust-mist removal, solvent infiltration absorption, two-stage cyclone dust-mist removal and activated carbon adsorption treatment from bottom to top. The method organically combines various treatment technologies, not only achieves the integrated treatment of the paint mists and the VOC, but also has the advantages of simple and compact process equipment and structure and good treatment effect; and the waste gas after treatment can reach the ''integrated emission standard of air pollutants'' (GB16297-1996) second-grade emission standards, and the treatment efficiency of the VOC in the waste gas is high and can reach 99% or more.

Description

technical field [0001] The invention belongs to the technical field of spray paint waste gas treatment, in particular to an integrated treatment method for paint spray waste gas. Background technique [0002] In the prior art, the painting process is widely used in industries such as machinery, electrical equipment, home appliances, automobiles, ships, and furniture. The spraying agent used for painting is mainly paint, and a certain amount of exhaust gas is discharged during the production process. The components are organic pollutants such as paint dust (paint mist) and volatilized benzene and benzene series (VOC for short), which cause ambient air pollution and must be treated to meet environmental protection emission requirements. Therefore, the exhaust gas treatment of the spray booth is a part of the spray production process. The existing paint waste gas treatment methods mainly include isolation method, combustion method, absorption method, condensation method, plasma...

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Problems solved by technology

[0002] In the prior art, the painting process is widely used in industries such as machinery, electrical equipment, home appliances, automobiles, ships, and furniture. The spraying agent used for painting is mainly paint, and a certain amount of exhaust gas is discharged during the production process. The components are organic pollutants such as paint dust (paint mist) and volatilized benzene and benzene series (VOC for short), which cause ambient air pollution and must be treated to meet environmental protection emission requirements. Therefore, the exhaust gas treatment of the spray booth is a part of the spray production process. The existing paint waste gas treatment methods mainly include isolation method, combustion method, absorption method, condensation method, plasma low-temperature catalytic oxidation method, adsorption method, etc., these methods have their own advantages and disadvantages, most of the existing enterprises use a single The treatment method cannot realize the simultaneous treatment of liquid paint mist and insoluble water VOC in the exhaust gas. Although some have realized the combination of various methods, there are long process flow, complicated equipment, large area of ​​the entire treatment system, and poor control. Convenience, poor processing effect and other disadvantages

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