Method and device for deodorization by coupled catalytic oxidation

Abstract

The invention provides a method and a device for deodorization by coupled catalytic oxidation. An obnoxious gas passes through a reaction system provided with a vacuum ultraviolet lamp, a UVC ultraviolet lamp and a catalyst. The ozone, the UVC and the catalyst in the system are subjected to coupled catalysis reaction to generate a high-concentration hydroxyl free radical and oxidize hydrogen sulfide, ammonia gas and volatile organic contaminant in the obnoxious gas; and a manganese dioxide adsorbent is arranged at the tail end of the reaction system for destructing the residual ozone in the air and adsorbing the residual contaminant. The device for deodorization by coupled catalytic oxidation provided by the invention comprises a spoiler, an UV irradiation reactor, an air pipe, a fan and a tail gas destructor, wherein the fan pumps the obnoxious gas into the device; the spoiler is fixed at the front end of the UV irradiation reactor; an UV lamp tube is arranged in the reactor; a catalytic grid is arranged between the lamp tube; a catalyst film is coated on the surface of the grid; the UV irradiation reactor is connected with the air pipe; and the tail end of the air pipe is connected with the tail gas destructor.

Description

technical field [0001] The invention relates to a treatment method and device for deodorizing malodorous gas. Background technique [0002] Odor refers to a kind of psychological discomfort or disgust produced by gaseous substances through human sense of smell. Odor pollution is a kind of sensory public hazard and has become one of the seven major environmental public hazards in the world. With the continuous acceleration of urbanization, various places are building urban sewage treatment plants of different sizes according to environmental protection requirements. However, because the sewage treatment plants are close to residential areas, the foul gas generated during sewage treatment not only shortens the time for drainage related facilities. Therefore, how to scientifically and rationally deal with the malodorous gas produced in urban sewage treatment plants, sewage pipelines and sewage pumping stations is a major challenge for the national water industry. pressing issu...

AI Technical Summary

Problems solved by technology

Biotechnology is economical, but the treatment effect on many toxic and difficult-to-biodegrade organic pollutants is not ideal. Biological treatment is significantly affected by ambient temperature. The equipment occupies a large area and requires high technical requirements for operation and management.

The physical adsorption method has a good effect on various pollutants in irritating gases, but the adsorbent needs to be replaced after the adsorption capacity is consumed, and the cost of long-term operation is high

Ozone oxidation is an efficient and clean gas purification method, but the reaction speed of ozone is slow when oxidizing some organic pollutants, and the reaction time is long; in addition, the ozone generator is sensitive to air humidity, and the amount of ozone generated is insufficient under humid conditions

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