Volatile organic pollutant processing apparatus

Abstract

The invention provides a volatile organic pollutant processing apparatus. The volatile organic pollutant processing apparatus comprises a UV paint mist separating and removing device, a spraying and cyclone dust removal integration apparatus, a rotational flow plate and filler integrated spraying apparatus, a dry-type filter, an active carbon adsorption concentration and catalytic combustion desorption regeneration apparatus and a discharging chimney, wherein an air outlet of the UV paint mist separating and removing device is connected with an air inlet of the spraying and cyclone dust removal integration apparatus, and an air outlet of the spraying and cyclone dust removal integration apparatus is connected with an air inlet of the rotational flow plate and filler integrated spraying apparatus. The volatile organic pollutant processing apparatus has the beneficial effects that volatile organic pollutant waste gases of the paint spraying industry (high air volume, low concentration, and vast paint mist particles) can be efficiently processed, the high-air-volume and low-concentration waste gas can be converted to high-concentration and small-air-volume waste gas, so that a purpose of reducing the investment, saving the energy consumption, reducing the operation cost and the like can be achieved.

Description

Technical field [0001] The invention relates to an exhaust gas treatment device, in particular to a volatile organic pollutant treatment device. Background technique [0002] VOCs (volatile organic compounds), also known as volatile organic compounds, refer to a class of organic compounds with a saturated vapor pressure greater than 70 Pa at room temperature and a boiling point no greater than 260°C at room pressure. From an environmental perspective, VOCs refer to gaseous organic matter that can cause environmental pollution. There are two main hazards of VOCs. One is direct hazard, which can stimulate the respiratory system of humans and animals and cause respiratory system diseases. Many types of VOCs have carcinogenic, teratogenic, and mutagenic effects; the other is secondary hazards. , VOCs will cause some photochemical reactions in the air, causing haze and photochemical smog and other disasters. [0003] With the continuous development of my country's economy and social p...

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Problems solved by technology

However, this measure requires large investment, high energy consumption, and high operating costs. Therefore, this method is generally not used for the treatment of "triphenyl" pollution in spraying operations, and the exhaust gas from spraying paint has the characteristics of large air volume, low concentration, and large paint mist. Before the condensation process, the corresponding pretreatment process (removal of paint mist particles) must be designed, otherwise the condenser will be blocked

[0006] (2) Absorption method. The actual application of this method has low absorption efficiency and oil mist entrainment. It is generally difficult to meet the national emission standards, and there are secondary pollution problems. Moreover, the waste gas from spray painting is an organic waste gas, and the main component is "triphenyl ", generally insoluble in water, the treatment efficiency is very low

The exhaust gas from spray painting has the characteristics of large air volume, low concentration, and large amount of paint mist, so the adsorption process alone is not suitable for the treatment of exhaust gas from spray paint. If the regeneration device is not equipped, the activated carbon needs to be replaced regularly, and the operating cost is very high, and must be done. Good pretreatment of paint mist particles to prevent paint mist particles from clogging activated carbon

[0008] (4) Combustion method, which has low energy consumption, high purification rate (95% to 97%), no secondary pollution, simple process and convenient operation. It is suitable for the treatment of organic waste gas with high temperature, high concentration and small air volume. It is not suitable for Low-concentration, high-volume organic waste gas treatment, while the concentration of "triphenyl" in spray paint waste gas is generally lower than 300-400mg / m3, which belongs to the type of high-volume, low-concentration waste gas, so direct combustion and catalytic combustion are used for treatment None of them are suitable, and the exhaust gas from spraying paint contains a lot of paint mist particles, which must be pretreated. If it enters the combustion device directly, it will poison the catalyst and cause the risk of explosion

However, the biological method needs to rely on microorganisms to degrade organic matter. Microorganisms have strict requirements on the living environment and exhaust gas components. When the exhaust gas contains components that inactivate microorganisms (such as paint mist particles in spray paint exhaust gas), it cannot This method is adopted, and the exhaust gas from spray painting belongs to the type of exhaust gas with large air volume and low concentration. Therefore, when the biological method is adopted, the equipment occupies a large area, the investment is high, and it is necessary to continuously provide nutrients to the microorganisms, and the operating cost is also high.

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