Heat recycling system and method for VOCs

Abstract

The invention discloses a heat recycling system and method for VOCs. The system comprises a microwave catalytic combustion device, one end of an air inlet channel is connected with a VOCs air source, the other end is connected with a shell side inlet of a first heat exchanger, a shell side outlet is connected with an air inlet of the microwave catalytic combustion device, an air outlet is connected with a pipe side inlet of the first heat exchanger, a pipe side outlet of the first heat exchanger is connected with a pipe side inlet of a second heat exchanger, a pipe side outlet of the second heat exchanger is connected with a tail gas absorption device, a fresh air device is connected with a shell side inlet of the second heat exchanger, and a shell side outlet is connected with a heat supply pipe network. By means of the microwave catalytic combustion device, VOCs waste gas can be subjected to efficient catalytic oxidation and mineralization, and the degradation and mineralization rate of the VOCs is effectively increased; the first heat exchanger is arranged, preheating of inlet air of the microwave catalytic combustion device is achieved, the temperature rising speed of a catalyst bed layer is increased, the temperature rising time of the catalyst bed layer is shortened, the VOCs waste gas degradation effect is improved, and heat recovery of the VOCs subjected to catalytic oxidation is achieved.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and in particular relates to a VOCs heat recovery system and method. Background technique [0002] Volatile organic compounds (Volatile organic compounds, referred to as VOCs) is a general term for a class of compounds, usually refers to organic chemical substances with high vapor pressure and volatile under normal temperature and pressure, mainly including various aliphatic and aromatic compounds. Alkanes, alkenes, oxygen-containing hydrocarbons, and halogenated hydrocarbons, such as benzene, benzene series, alcohols, ketones, and acetates; VOCs generally have strong irritation and toxicity, and some have teratogenic and carcinogenic effects; Halogenated hydrocarbon VOCs can destroy the ozone layer and cause global environmental problems such as the greenhouse effect; in summary, the emission of VOCs has caused great harm to human and biological health and the ecological environmen...

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Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a system and method for heat recovery and utilization of VOCs to solve the problem that the exhaust gas after catalytic combustion is directly discharged into the air when the existing catalytic oxidation method is used to treat VOCs, which is easy to Technical issues causing air pollution and wasted heat

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