System for purifying volatile organic compounds exhaust gas through plasma synergistic biological technology

Abstract

The invention relates to a system and method for purifying volatile organic compounds VOCs exhaust gas through a plasma synergistic biological technology, and belongs to the organic waste gas pollution control field. The device includes a gas inlet, a dry type filter, a plasma purification device, a biological filter pool purification device, an air supplement port, a detection port, an exhaust blower, and an exhaust cylinder; the gas inlet collects the VOCs exhaust gas, the exhaust gas is filtered by the dry type filter and then is transported to the plasma purifying device, organic molecules are decomposed into small-molecular substances by the plasma purification device, gas after decomposition is transported to the biological filter pool purification device, the small-molecular organic matters are decomposed into CO2 and H2O by microorganisms, and finally, CO2 and H2O are discharged to upper air through the exhaust cylinder by the exhaust blower.

Description

technical field [0001] The patent of the present invention relates to a system (or device) and method for purifying volatile organic compound (VOCs) waste gas by plasma cooperative biotechnology, which belongs to the field of organic waste gas pollution control. Background technique [0002] Volatile organic compounds (Volatile organic compounds, VOCs) usually refer to organic compounds with a saturated vapor pressure greater than 133Pa at 25°C, and their main components are hydrocarbons, halogenated hydrocarbons, oxygen hydrocarbons, sulfur hydrocarbons, nitrogen hydrocarbons, aromatic hydrocarbons and polycyclic aromatic hydrocarbons. VOCs are a kind of commonly used reagents in the petrochemical industry, spray painting industry, paint production and processing industry, rubber production and processing industry, printing and dyeing industry, etc. The resulting VOCs exhaust gas usually has complex components and large changes in emission concentration. , not easily solub...

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Problems solved by technology

[0003] The current conventional methods for VOCs and their shortcomings are as follows: combustion method, mainly for high-concentration and small-volume VOCs waste gas with complex components, which has high investment and operation costs, poor operation safety and is prone to secondary pollution; activated carbon adsorption method is applicable For VOCs waste gas with low concentration and large volume, activated carbon is easy to adsorb and saturate, the cost of replacing the adsorbent is expensive, and the activated carbon after adsorption and saturation needs to be treated as a kind of hazardous waste; absorption method is suitable for high concentration, low temperature and good solubility VOCs waste gas, the absorbent needs to be recycled, which is easy to form secondary pollution; condensation method, for high-concentration, high-boiling point, small-volume single-component VOCs waste gas, the process is complex, complex components and medium and high volatility components The recovery rate is low; the biological method is aimed at low-to-medium concentration, atmospheric volume, and biodegradable VOCs waste gas. This method has a low removal rate for high-concentration and poorly biodegradable waste gas.

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