Coal chemical wastewater treatment device and process

The invention relates to a coal chemical wastewater treatment device and process, belonging to the technical field of wastewater treatment. The device is sequentially provided with a flocculation reaction-sedimentation tank, a catalytic ozonation device, a biological activated carbon filter tank, an ultrafiltration unit and a reverse osmosis unit which communicate with each other along a water inlet direction, wherein the flocculation reaction-sedimentation tank adopts an integrated structure and is coupled with a dosing system connected with the flocculation reaction-sedimentation tank; the ozone catalytic oxidation device is coupled with the biological activated carbon filter tank; and the flocculation reaction-sedimentation tank is provided with image recognition equipment, and the image recognition equipment is used for recognizing and comparing floc in the flocculation reaction-sedimentation tank and feeding a result back to a chemical adding system to control a chemical adding amount. The device and the