Device and method for controlling waste gas

Abstract

The invention discloses a device and a method for controlling waste gas. The device comprises an absorption-liquid circulation groove, a cyclone absorption tower connected with the top of the absorption-liquid circulation groove through pipelines, as well as an adsorber of which one end is connected with the top of the cyclone absorption tower and the other end is connected with a liquid drainage port, wherein the cyclone absorption tower comprises a tower body, a gas-liquid-mixing cyclone blade group, a demisting cyclone blade group and a liquid inlet pipeline, and the upper and lower ends of the cyclone absorption tower are provided with a gas inlet pipeline and a gas outlet pipeline respectively. The method comprises the steps of blasting coating waste gas through a fan, allowing the coating waste gas to enter the cyclone absorption tower and the adsorber from an air inlet and treating the coating waste gas. The invention solves system failure caused when viscous components block equipment in the treatment of the coating waste gas containing the viscous components, reduces the time for shutdown maintenance caused by the equipment, as well as the consumption of manpower and material resources, and also solves the problem that the absorption method for controlling waste gas cannot reach standards. A technical system in the invention has high purification efficiency and can completely meet the requirements of national atmospheric pollutant emission standards. The system has the advantages of low resistance, low energy consumption, reliable operation and simple maintenance.

Description

technical field [0001] The invention relates to a device and method for treating waste gas. Background technique [0002] Painting is the most basic technical means adopted for product surface protection and decoration. The painting operation covers all sectors of the national economy, but the painting workshop is one of the main production sites of environmental pollution. The most serious hazard of the painting workshop is the impact of exhaust gas on the atmosphere. pollution. [0003] In air spraying operations, 50% to 70% of solvent-based coatings are scattered as paint mist during the coating process. Most of the organic solvents in the paint are volatilized and released into the atmosphere. Harmful exhaust gas emitted during painting is mainly concentrated in the painting production line, in which the spray booth, drying room, and drying room are the main sources of exhaust gas. [0004] The harm of organic volatile substances is mainly manifested in three aspects:...

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Problems solved by technology

[0006] (2) Depletion of the high-altitude ozone layer

[0007] (3) toxicity

However, the above-mentioned methods all have the problem that the viscous components in the coating exhaust gas are easy to block the adsorption medium and fillers, resulting in the failure of the coating exhaust gas treatment system to operate and the heavy workload of operation and maintenance, which leads to the application of the above methods in the treatment of coating exhaust gas. restricted

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