Photocatalytic oxidation and molecular sieve absorption catalytic oxidation method for industrial waste gas VOCs

A photocatalytic oxidation, industrial waste gas technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve problems such as increased equipment operating costs, high ozone concentration, VOCs and ozone molecules escape.

Inactive Publication Date: 2016-06-29
南通科奥环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The photocatalytic oxidation treatment process of industrial organic waste gas VOCs has the advantages of less investment, high treatment efficiency, and low cost; however, the photocatalytic oxidation process still has shortcomings: 1. Since the waste gas treatment is dynamic and continuous, the reaction time is short, Cause some incompletely reacted VOCs and ozone molecules to escape, exhaust gas, high ozone concentration or substandard emissions; 2. When the exhaust gas source fluctuates and the amount of VOCs in the organic waste gas generated instantaneously is too large, some VOCs will not be treated well...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] An Electronics Co., Ltd. in Nantong, Jiangsu Province, drying and forming section, with an exhaust air volume of 8000m 3 / h, pretreated by wet spray adsorption device (scrubbing tower), and then subjected to a catalytic oxidation, molecular sieve adsorption, and a second catalytic oxidation. TiO2 is used as a catalyst in the first catalytic oxidation and the second catalytic oxidation. Total non-methane hydrocarbons are 28mg / m 3 、39mg / m 3 , 22mg / m 3 、31mg / m 3 (120mg / m 3 , GB16297-1996); the average detection value of O3 (ozone) 4 times in 1 hour is 63ug / m 3 、41ug / m 3 、32ug / m 3 、69ug / m 3 (200ug / m 3 , GB3095-2012).

example 2

[0034] A Shandong Chemical Co., Ltd. has an extraction production section with an exhaust air volume of 12000m3 / h. It is pretreated by a wet spray adsorption device (scrubber), and then undergoes a catalytic oxidation, molecular sieve adsorption, and a second catalytic oxidation. The first catalytic oxidation and the second 55% TiO is used in catalytic oxidation 2 and 45% MnO 2 Composite catalyst, 3 detections of formaldehyde in the exhaust gas are 8mg / m 3 、19mg / m 3 , 12mg / m 3 (25mg / m 3 , GB16297-1996); O 3 (Ozone) The average detection value of 4 times in 1 hour is 65ug / m 3 、48ug / m 3 、35ug / m 3 、79ug / m 3 (200ug / m 3 , GB3095-2012).

example 3

[0036] A Shanghai Resin Co., Ltd., drying molding section, exhaust air volume 12000m 3 / h, pretreated by a wet spray adsorption device (scrubbing tower), and then subjected to a catalytic oxidation, molecular sieve adsorption, and a second catalytic oxidation. The first catalytic oxidation and the second catalytic oxidation use 80% TiO 2 and 20% MnO2 Composite catalyst, non-methane total hydrocarbons in the exhaust gas detected 3 times are 17mg / m 3 、29mg / m 3 , 26mg / m 3 , 21mg / m 3 (120mg / m 3 , GB16297-1996); O 3 (Ozone) The average detection value of 4 times in 1 hour is 65ug / m 3 、48ug / m 3 、35ug / m 3 、79ug / m 3 (200ug / m 3 , GB3095-2012).

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PUM

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Abstract

The invention discloses a photocatalytic oxidation and molecular sieve absorption catalytic oxidation method for industrial waste gas VOCs. The method comprises the steps of waste gas pretreatment, carbon chain cutting, active oxygen preparation, first-time catalytic oxidization, molecular sieve adsorption and second-time catalytic oxidation. According to the method, the technology is simple and convenient to operate, the emission concentration of the organic waste gas VOCs and ozone can be significantly reduced, secondary pollution is avoided, the power of a photocatalytic oxidation technology is reduced, and energy sources are saved.

Description

technical field [0001] The invention relates to a method for photocatalytic oxidation of industrial waste gas VOCs and molecular sieve adsorption catalytic oxidation. Background technique [0002] In recent years, with the development of the economy, a large number of new chemical companies have led to the discharge of a large amount of industrial organic waste gas VOCs, which has degraded the quality of the atmospheric environment, seriously endangered human health, and caused huge losses to the national economy. Therefore, it is necessary to increase Treatment of organic waste gas VOCs. For the treatment of organic waste gas VOCs, thermal destruction method, condensation method, absorption method, biofilm method, photocatalytic oxidation method, plasma decomposition method, etc. are widely used at present. [0003] The photocatalytic oxidation treatment process of industrial organic waste gas VOCs has the advantages of less investment, high treatment efficiency, and low c...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/00B01D53/44B01D46/00B01D47/06
CPCB01D46/00B01D47/06B01D53/007B01D53/8687B01D53/869B01D2255/20707B01D2255/2073B01D2255/20738B01D2255/20776B01D2255/20792B01D2255/209B01D2257/708Y02A50/20
Inventor 许晓彬
Owner 南通科奥环保科技有限公司
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