Waste gas purification method and device

Abstract

The invention discloses a waste gas purification method. The purification method comprises steps of: first, spraying and washing the waste gas to effectively remove dust particles and partial water soluble pollutants in the waste gas; and second, conducting a photocatalytic oxidation treatment to oxidize and decompose harmful gas, such as benzenes, ketones, aldehydes and non-methane hydrocarbons, in waste gas, into pollution-free water and carbon dioxide, so as to obtain clean gas. In addition, the invention also discloses a waste gas purification device, which is characterized by comprising a spray scrubbing tower and a secondary purification tower; the spray scrubbing tower is connected with a gas outlet of the secondary purification tower; the spray scrubbing tower is provided with a spray atomizer; and the secondary purification tower is provided with a photocatalyst device and an ultraviolet lamp.

Description

Technical field: [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a waste gas purification treatment method and a device thereof. Background technique: [0002] At present, the organic waste gas purification processes used in paint spraying rooms, painting workshops, chemical plants, pharmaceutical plants and other places mainly include activated carbon adsorption, catalytic combustion, and low-temperature plasma. The activated carbon adsorption method has problems such as large resistance coefficient, high energy consumption, difficulty in controlling the saturation point of adsorption, small adsorption capacity, and high operating costs. Both catalytic combustion and low-temperature plasma processes have unsafe hazards, which can lead to explosions and fires. Catalytic combustion has disadvantages such as expensive catalysts, easy poisoning, high energy consumption of catalytic combustion technology, and difficult...

AI Technical Summary

Problems solved by technology

The activated carbon adsorption method has problems such as large resistance coefficient, high energy consumption, difficulty in controlling the saturation point of adsorption, small adsorption capacity, and high operating costs.

Both catalytic combustion and low-temperature plasma processes have unsafe hazards, which can lead to explosions and fires. Catalytic combustion has disadvantages such as expensive catalysts, easy poisoning, high energy consumption of catalytic combustion technology, and difficulty in starting and maintaining; low-temperature plasma still exists and is prone to spark discharge , high power consumption, incomplete decomposition of organic matter, etc.

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