A system and method for comprehensive treatment and thermal energy utilization of coal chemical vocs

Abstract

The invention discloses a comprehensive treatment and thermal energy utilization system and method for coal chemical VOCs. The system comprises a gas pretreatment unit, a low-temperature plasma synergistic catalysis unit, an exhaust gas post-treatment unit, a thermal energy recovery unit and a monitoring control unit. By means of the system and method, various kinds of catalysts are combined for use, and the overall removal effect on the complex component VOCs can be obviously improved; an automatic control switch is additionally arranged, so that on the premise of ensuring that optimal powersupply parameters are unchanged, the adaptability of the system under different working conditions is improved; the gas pretreatment unit is additionally arranged, so that particulate matter in coal chemical exhaust gas is removed, and the wear of the subsequent treatment units is greatly reduced; through the addition of the thermal energy recovery unit, the temperature of key parts of the whole system is monitored and controlled so that under different working conditions, a dust collector, the catalysts and the like can still work within an optimal temperature range, excess heat in the exhaust gas and heat generated by a catalytic reaction are recycled at the same time, and the overall energy utilization efficiency is further improved.

Description

technical field [0001] The invention belongs to the technical field of VOCs comprehensive treatment in coal chemical industry, and in particular relates to a system and method for comprehensive treatment and heat energy utilization of VOCs in coal chemical industry. Background technique [0002] Volatile Organic Compounds (VOCs) refer to organic compounds that participate in atmospheric photochemical reactions, mainly including: alkanes, unsaturated hydrocarbons, benzene series, alcohols, aldehydes and ketones, esters, halogenated hydrocarbons, etc. A considerable part of them has strong teratogenic, carcinogenic and mutagenic effects on the human body, and at the same time, it is still inhalable particulate matter (PM 2.5), ozone (O 3 ) plays an important role in the formation of secondary pollutants such as In view of these hazards of VOCs, the country is actively seeking relevant control methods. [0003] At present, common VOCs control methods can be roughly divided in...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a system and method for comprehensive treatment of VOCs in coal chemical industry and utilization of heat energy, to realize comprehensive treatment of VOCs in coal chemical industry and utilization of heat energy, and to solve the problems of high solid particle content, high temperature, and complex composition of coal chemical industry waste gas. The structure of the existing low-temperature plasma synergistic catalytic device is changed, and gas pretreatment, monitoring control and heat energy recovery units are added to realize flexible control of the system and efficient purification of exhaust gas

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