Gas collection and treatment device

The utility model relates to the technical field of gas collection and treatment, in particular to a gas collection and treatment device which comprises a U-shaped box, a drainage plate is fixedly installed in the inner wall of the U-shaped box, the U-shaped box is communicated with the drainage plate, sliding grooves are symmetrically formed in the inner side wall of the U-shaped box, and sliding blocks are installed in the two sliding grooves in a sliding mode. The air supply mechanism comprises a fan, the fan is fixedly connected with the U-shaped box, an air inlet pipe is fixedly installed at the upper end of the fan, an air outlet pipe is fixedly installed at the end, away from the air inlet pipe, of the fan, and the air outlet pipe is fixedly arranged in the U-shaped box. A filter screen is fixedly mounted in the inner wall of the gas outlet pipe, a vertical block is fixedly mounted at one end, away from the fan, of the gas outlet pipe, and a baffle disc is fixedly mounted at the upper end of the vertic