Overview of paint room exhaust gas

During the painting process in the paint room, spray particles and other forms of organic waste gas will be produced. These organic waste gases contain many toxic substances, which not only pollute the environment but also damage human health. Therefore, it is essential to purify these organic waste gases. So what are the methods of waste gas treatment in the paint room? The editor of Tianhaoyang Environmental Protection will give you a detailed introduction.

Exhaust gas treatment method in paint room

The main component of paint room waste gas is organic waste gas. At present, there are many treatment methods for organic waste gas, mainly including activated carbon adsorption method, low temperature plasma method, combustion method and UV photolysis method.

1. Activated carbon adsorption method

Activated carbon adsorption is a common waste gas treatment method. The adsorption method uses porous activated carbon, silicon bath soil, anthracite, etc. to adsorb organic gas molecules to its surface, thereby purifying the exhaust gas.

Advantages: high purification rate (activated carbon adsorption can reach more than 95%), universal utility, simple operation and low investment.

Disadvantages: After the adsorption is saturated, new activated carbon needs to be replaced, and the replacement of activated carbon requires costs. The replaced activated carbon after saturation also needs to be treated by professionals for hazardous waste treatment, and the operating cost is high.

2. Ion purification method

During the dielectric barrier discharge process in the low-temperature plasma purification equipment, particles rich in high chemical activity, such as electrons, ions, free radicals and excited molecules, are generated inside the plasma. The pollutants in the exhaust gas react with these active groups with high energy and are converted into substances such as CO2 and H2O, so as to achieve the purpose of purifying the exhaust gas.

Applicable conditions: Wide range of application, high purification efficiency, especially suitable for multi-component malodorous gases that are difficult to deal with by other methods. The electrons have high energy and can interact with almost all odorous gas molecules.

Advantages: fast response, the device starts and stops very quickly, and can be opened at any time. Disadvantages: high one-time investment, security risks.

3. Combustion method

The combustion method is further divided into direct combustion method and catalytic combustion method, which are mainly used for the purification of high-concentration VOCs exhaust gas. For medium and low concentration exhaust gas that cannot be combusted by itself, it usually requires combustion accelerant or heating, which consumes a lot of energy, and the operating cost is more than 10 times higher than that of the catalytic combustion method. The operating technical requirements are high, and it is difficult to control and master.

The advantage of the catalytic combustion method is that the catalytic combustion is flameless combustion and has good safety. The characteristics of this method are: low ignition temperature, energy saving; high purification rate, no secondary pollution; simple process, convenient operation, good safety; device volume Small size, less floor space; lower equipment maintenance and depreciation costs. This method is suitable for high temperature, medium and high concentration organic waste gas treatment, and the effect is good.