A kind of vocs removal method of ozone combined with photolysis peroxide

A technology of peroxide and ozone, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., can solve the problems of increased loading, unloading, transportation, replacement and other working procedures, low ignition temperature, frequent replacement of activated carbon, etc., to achieve Broad application prospects, efficient removal effect

Active Publication Date: 2019-12-31
CHANGSHU YONGXIN PRINTING & DYEING CO LTD
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  • Abstract
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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.

Method used

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  • A kind of vocs removal method of ozone combined with photolysis peroxide
  • A kind of vocs removal method of ozone combined with photolysis peroxide
  • A kind of vocs removal method of ozone combined with photolysis peroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1. Toluene content in flue gas is 400mg / m 3 , the flue gas inlet temperature of the upper and lower spraying beds is 55°C, and the liquid-gas ratio is 1.0L / m 3 , the concentration of hydrogen peroxide is 1.0mol / L, the pH of the solution is 3.5, the temperature of the solution is 50°C, and the effective radiation intensity of ultraviolet light is 40μW / cm 2 , The effective wavelength of ultraviolet light is 254nm. The result of the small test is: the removal efficiency of toluene in the flue gas is 71.5%.

Embodiment 2

[0050] Embodiment 2. Toluene content in flue gas is 400mg / m 3 , the flue gas inlet temperature of the upper and lower spraying beds is 55°C, and the liquid-gas ratio is 1.0L / m 3 , the concentration of ammonium persulfate is 1.0mol / L, the pH of the solution is 3.5, the temperature of the solution is 50°C, and the effective radiation intensity of ultraviolet light is 40μW / cm 2 , The effective wavelength of ultraviolet light is 254nm. The result of the small test is: the removal efficiency of toluene in the flue gas is 67.9%.

Embodiment 3

[0051] Embodiment 3. Toluene content in flue gas is 200mg / m 3 , the flue gas inlet temperature of the upper and lower spraying beds is 55°C, and the liquid-gas ratio is 1.0L / m 3 , the concentration of hydrogen peroxide is 1.0mol / L, the pH of the solution is 3.5, the temperature of the solution is 50°C, and the effective radiation intensity of ultraviolet light is 40μW / cm 2 , The effective wavelength of ultraviolet light is 254nm. The result of the small test is: the removal efficiency of toluene in the flue gas is 88.8%.

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PUM

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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 by combining ozone with photolytic peroxide. Background technique [0002] VOCs is the English abbreviation of Volatile Organic Compounds. A large number of studies have shown that after VOCs enter the human body through the respiratory tract and skin, they can cause temporary and permanent lesions in human breathing, blood, liver and other organs (such as causing various blood diseases and cancers). Various organic waste gases are produced in industrial production, mainly including various hydrocarbons, alcohols, aldehydes, acids, ketones and amines, etc. These organic waste gases will cause air pollution and endanger human health. With the rapid development of the economy and the improvement of people's awareness of environmental protection, the problem of VOCs removal in exhaust gas has attracted more and more attention. At the same time, the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/75B01D53/44
CPCY02A50/20
Inventor 刘杨先王燕张永春赵亮张军
Owner CHANGSHU YONGXIN PRINTING & DYEING CO LTD
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