Plasma biology deodorization technique and system of vent gas from steel-drum spray-painting production line

Abstract

The invention relates to a plasma biological deodorization process and a system for gas discharged from a steel drum spray coating product line. The process comprises: firstly, contacting to-be-treated exhaust gas with cooling fluid in a cooling tower to carry out cooling down and water washing of the exhaust gas through gas-fluid cross contact; then, injecting the exhaust gas into a plasma deodorization device to break the molecular chain of organic substances in the exhaust gas, and turning toxic and harmful substances in the exhaust gas into nontoxic and harmless substances through oxidation-reduction reaction; carrying out centrifugal treatment of the exhaust gas through a centrifugal fan to form high-speed high-concentration exhaust gas; adopting liquid-phase exhaust gas absorption medium to absorb pollutants in the exhaust gas inside a chemical washing tower; and finally, in a combined biological deodorization tower, degrading the degradable components in the exhaust gas into water and carbon dioxide by means of a biological degradation process, and absorbing undegraded components in the exhaust gas by means of porous solid matter. The plasma biological deodorization processand the system can carry out effective treatment on exhaust gas containing complex components through combined treatments including chemical washing, biological degradation and physical adsorption, so as to meet the emission requirements of national standards.

Description

technical field [0001] The invention relates to a waste gas treatment process and system, in particular to a process and a system for treating waste gas in a steel barrel spraying production line and the like in a combined manner. Background technique [0002] Waste gas treatment is a very important link for manufacturing enterprises. If the waste gas is not treated properly, it will have adverse effects on the surrounding environment and human health. For this reason, the state has formulated various standards to control the discharge of pollutants. [0003] Due to the use of different raw materials and processes in different production lines, the composition of the final exhaust gas is also different, so different processes and equipment are required for exhaust gas treatment. Taking the steel drum spraying production line as an example, the exhaust gas emitted is mainly composed of various organic pollutants, and its composition is quite complex. Common treatment methods ...

AI Technical Summary

Problems solved by technology

However, due to the complexity and particularity of the exhaust gas composition, it is difficult to completely treat the exhaust gas with a single method

For example, the existing chemical adsorption is characterized by strong selectivity, but the adsorption speed is slow, and it takes a long time to reach the adsorption equilibrium. Therefore, it is difficult to apply to waste gas with complex organic pollution components. If the adsorption speed is to be accelerated , you need to increase the temperature, which will greatly increase the equipment and operating costs of the production line

However, the existing catalytic combustion treatment method has potential safety hazards when treating organic waste gas with complex components, and consumes a lot of heat energy. In addition, the waste gas needs to be preheated to 200-400°C before treating the waste gas. High temperature, heat exchange and thermal control to remove organic compounds, there are problems such as high operation difficulty and high investment cost

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