Method for removing VOCs (volatile organic chemicals) by ozone and photolytic peroxide

Abstract

The invention relates to a method for removing VOCs (volatile organic chemicals) by ozone and photolytic peroxide. According to the method, the VOCs from a discharging source are firstly pre-oxidized into organic intermediate by the ozone in a flue, ultraviolet light excites the peroxide to generate sulfate radical and hydroxyl free radical, so that the VOCs and the organic intermediate generated by oxidization of the ozone are further oxidized, and final decomposition products are harmless CO2 and harmless H2O. The VOCs in flue gas can be efficiently removed, secondary pollution is avoided in the removing process, and a novel VOCs purification system has a wide application prospect.

Description

Technical field [0001] The invention relates to the field of air pollutant control, in particular to a method for removing VOCs from ozone combined with photolytic peroxide. Background technique [0002] VOCs is the abbreviation of Volatile Organic Compounds. A large number of studies have shown that after entering the human body through the respiratory tract and skin, VOCs can cause temporary and permanent lesions (for example, various blood diseases and cancers) to human organs such as breathing, blood, and liver. Industrial production will produce various organic waste gas, mainly including various hydrocarbons, alcohols, aldehydes, acids, ketones and amines, etc. These organic waste gas will cause air pollution and harm human health. With the rapid economic development and the improvement of people's awareness of environmental protection, the removal of VOCs in exhaust gas has attracted more and more attention. At the same time, the country has also formulated corresponding...

AI Technical Summary

Problems solved by technology

The catalytic combustion method is to convert the exhaust gas into harmless and odorless carbon dioxide and water through catalytic combustion. This method has low ignition temperature, energy saving, high purification rate, convenient operation, small footprint, and is suitable for high temperature or high concentration. Organic waste gas, but the catalyst is easily poisoned and deactivated, and the stability is poor

The removal efficiency of the activated carbon adsorption method can reach 95%, the equipment is simple, and the investment is small, but the activated carbon is replaced frequently, which increases the working procedures of loading, unloading, transportation, and replacement, resulting in increased operating costs

[0004] Therefore, so far, although a variety of VOCs removal technologies have been developed and utilized, each technology has almost limited application range and many disadvantages.

Images