Waste gas treatment equipment, waste gas treatment method and drying system

Abstract

The invention discloses waste gas treatment equipment, a waste gas treatment method and a drying system. The waste gas treatment equipment comprises a waste gas recovery treatment unit and a fresh air heating unit. The waste gas recovery treatment unit comprises a first heat exchanger and a catalytic reactor. The first heat exchanger is provided with a first heat exchange side and a second heat exchange side which exchange heat mutually. The fresh air heating unit comprises a fresh air entering channel and a second heat exchanger. The second heat exchanger is provided with a third heat exchange side and a fourth heat exchange side which exchange heat mutually. An air inlet of the first heat exchange side is used for communicating with an air outlet of a drying oven, an air outlet of the first heat exchange side communicates with an air inlet of the catalytic reactor, an air outlet of the catalytic reactor communicates with an air inlet of the second heat exchange side, an air inlet of the fourth heat exchange side communicates with the fresh air entering channel, and an air outlet of the fourth heat exchange side is used for communicating with an air inlet of the drying oven. Waste gas heat exhausted by the drying oven can be sufficiently recycled, it is ensured that organic pollutant in waste gas is effectively treated, and fresh air can also be heated.

Description

technical field [0001] The invention relates to the technical field of printing equipment, in particular to an exhaust gas treatment equipment, an exhaust gas treatment method and a drying system. Background technique [0002] Drying is a common process in the printing process to dry the ink on the printed matter or coating. The existing printing industry mainly realizes the drying of printed matter or coating through electric heating, coal / oil boiler or hot air generated by heat pump, and usually there are the following problems: [0003] 1. The system adopts electric heating and kerosene boiler for drying. The waste gas generated after drying is directly discharged into the air. The waste gas contains a large amount of waste heat and organic substances, which are directly discharged into the air, causing waste of heat and environmental pollution. and destruction; [0004] 2. A system that uses a heat pump hot air dryer for drying generally recovers the waste heat in the ...

AI Technical Summary

Problems solved by technology

[0003] 1. The system adopts electric heating and kerosene boiler for drying. The waste gas generated after drying is directly discharged into the air. The waste gas contains a large amount of waste heat and organic substances, which are directly discharged into the air, causing waste of heat and environmental pollution. and destruction;

[0004] 2. A system that uses a heat pump hot air dryer for drying generally recovers the waste heat in the exhaust gas and then discharges it into the air, but it does not solve the problem of environmental pollution caused by the organic substances in the exhaust gas;

[0005] 3. Part of the improved heat pump drying system collects the waste gas generated after drying for organic solvent recovery and then discharges the waste gas into the air. The recovery treatment device usually uses physical methods to recover organic solvents, and the waste gas in the waste gas Incomplete treatment of organic substances can still cause certain pollution when discharged into the environment

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