Storage tank slag removal waste gas treatment system

The utility model provides a storage tank slag removal waste gas treatment system which solves the problem that when solid impurities at the bottom of a crude benzene raw material storage tank are removed, harmful waste gas directly escapes into the air after a manhole channel is opened, and the atmospheric environment is polluted. The device comprises a crude benzene raw material storage tank, wherein a manhole channel is arranged at the lower part of the crude benzene raw material storage tank; a closed collection room for surrounding the manhole channel is arranged on the outer side of the crude benzene raw material storage tank, and a room door structure is arranged on the closed collection room; a first suction pipeline is arranged at the top of the closed collection room in a penetrating manner, one end of the first suction pipeline extends into the closed collection room, and the other end of the first suction pipeline is connected with an air inlet pipeline of the carbon adsorption system; the carbon