Waste Gas Solution For Automotive Paint Booths

Automotive paint booths are widely used for each 4S shop, auto repair factory, etc. The exhaust gas problems generated by the paint booths when we use them have always been an issue of great concern to everyone. How can we make the exhaust gas reach the standard? What should we pay attention to when we deal with it? Car paint booth paint process will produce a variety of harmful gases, they are mainly benzene series, non-methane total hydrocarbons and other organic matter, its chemical composition is complex, and the raw material of the product is different, The composition and concentration are different, so the organic waste gas treatment method is also varied. Then, the following describes the six methods of organic exhaust gas treatment solution for automotive paint room:

First, adsorption method:

1. Direct adsorption method: The organic gas directly passes through activated carbon particles or activated carbon filter cotton, which can achieve a purification rate of 95%. The equipment is simple, the investment is small, and the operation is convenient. However, the activated carbon needs to be frequently replaced for low concentration and the contaminants need not be recycled. Occasions

2. Adsorption recovery method: After the organic gas is adsorbed on activated carbon, the activated carbon is saturated and desorption regeneration is performed with hot air.

Second, the water spray method: Water spray process has a wide range of applications in the treatment of atmospheric pollution, also used in the spraying process, such as the curtain cabinet is an example, the principle is to spray the water through the exhaust, the water in the exhaust Sex or large particle components settle down to achieve the purpose of separation of pollutants and clean gas. Its advantages are that water resources are easily available, and can be reused after filtration and precipitation to minimize the waste of water resources. The particle composition has a very high efficiency and is often used as a pretreatment for exhaust gas treatment.

Third, the condensate recovery method: the direct condensation of the exhaust gas or adsorption condensation, condensation, condensate separation and recovery of valuable organic matter. This method is used for high concentration, low temperature, small amount of air flow treatment. However, this method of investment, energy consumption High, operating costs, so there is no special need, generally do not use this method;

Fourth, catalytic combustion method: the exhaust gas heated to 200 ~ 300 °C after catalytic bed combustion, to achieve the purpose of purification. This method has low energy consumption, high purification rate, no secondary pollution, simple and easy operation. Suitable for high temperature and high concentration of organic Exhaust gas treatment is not suitable for the treatment of organic waste gas with low concentration and large air volume;

Fifth, direct combustion method: the use of gas or fuel and other auxiliary fuel combustion heat released by the mixed gas heated to a certain temperature (700-800 °C), residence for a certain time, so that combustible harmful gases combustion. The process is simple, equipment Less investment, but high energy consumption and high operating costs;

6. Absorption method: It can be divided into chemical absorption and physical absorption. However, triphenylene gas has low chemical activity and generally does not use chemical absorption. Physical absorption is the use of liquid absorbents with small volatility. High affinity, after absorption saturated, heated and analyzed, cooled and reused. This method is used for exhaust gas with low atmospheric temperature, low temperature, and low concentration. The device is complex, the investment is large, the selection of absorbing liquid is difficult, and there is secondary pollution.