Purification system for cooperatively treating VOCs (Volatile Organic Chemicals) by dielectric barrier discharge and photocatalysis

The utility model discloses a purification system for cooperatively treating VOCs (Volatile Organic Chemicals) by dielectric barrier discharge and photocatalysis. Wherein the pretreatment device (1),the fire retardance valve (2), the plasma VOCs removal device (5), the UV photolysis VOCs removal device (6), the O3 removal device (7), the NOx removal device (8) and the fan (11) are connected in sequence through pipelines; an electric proportional control valve (13) and a first VOCs online detector (14) are respectively arranged on a connecting pipeline between the pretreatment device (1) and the fire resisting valve (2), and linkage is realized under the action of a PLC (Programmable Logic Controller) control system (15). The device has the advantages of high purification efficiency, highsystem safety, simplicity in system control, easiness in operation, convenience in process parameter control, low equipment operation cost and the like, meets the treatment requirements of large-air-volume, low-concentration a