Waste gas treatment device in coal tar processing process

The invention relates to a waste gas treatment device in a coal tar processing process. The waste gas treatment device comprises an absorption tower body, the bottom end of the absorption tower body is connected with a liquid collection box, the waste gas treatment device also comprises a plurality of collection covers and an absorption liquid circulation mechanism. The collection covers are arranged on the left side of the absorption tower body. Each collection cover comprises an outer cover, an inner cover and a separation plate. The absorption liquid circulation mechanism is arranged at the lower part of the absorption tower body and comprises a liquid separation part and a circulation part; the liquid separation part comprises a baffle plate, a liquid guide plate, a liquid storage ring and a liquid separation tank, and the circulation part comprises circulation pipes and chemical pumps. The circulation pipes comprise a first circulation pipe, a second circulation pipe, a third circulation pipe and a fourt