Purification method and device for sticky dust-containing air

Abstract

The invention provides a purification method for sticky dust-containing air. The method includes: firstly collecting coating exhaust gas, sending paint spraying exhaust gas containing sticky paint mist dust and volatile organic matters into a spray tower, sending part of paint mist into spray liquid, sending volatile gas and other paint mist in the exhaust gas into a purifier, passing the coatingexhaust gas through a filter layer filled with light particulate matters to adhere sticky paint mist dust in the coating exhaust gas to the surfaces of light particulate matters in the filter layer, and passing the volatile organic matters in the coating exhaust gas through the filter layer; at the same time, conducting liquid flushing treatment on the filter layer for spray removal of the stickypaint mist dust adhering to the surfaces of light particulate matters in the filter layer; and passing the coating exhaust gas treated by the filter layer through a demisting layer in the purifier fordehydration, and then passing the exhaust gas through an activated carbon adsorption layer for emission. The process method provided by the invention is simple, has high treatment efficiency, and caneffectively solve the problem of exhaust gas control.

Description

Technical field: [0001] The invention relates to the field of environmental engineering, in particular to an air purification method and device containing viscous dust. technical background: [0002] According to the surface coating production process, the exhaust gas in the coating industry mainly comes from the pretreatment, spraying, and drying processes. The pollutants emitted are mainly: dust or paint mist generated during the pretreatment process, paint mist and organic solvents generated during painting. , The organic solvent produced during drying and volatilization. The paint mist mainly comes from the part of the solvent-based paint scattered in the air spraying operation, and its composition is consistent with the paint used. Organic solvents mainly come from solvents and thinners during the use of paint, and most of them are volatile emissions. The main pollutants are xylene, benzene, toluene, etc. [0003] The exhaust gas generated during the painting process ...

AI Technical Summary

Problems solved by technology

The traditional paint mist removal method generally adopts dry filtration, but in the existing technology, when using physical interception methods such as filtration, it is often unusable due to the paint mist sticking to the equipment

The traditional wet treatment of spray paint organic waste gas generally uses water-washing spray booths or spray towers. The main problem is that the purification efficiency is low and the pre-treatment requirements cannot be met.

The existing packing spray tower is easy to block, has high resistance, and cannot operate stably

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