The invention provides a
waste gas treatment device for a screw extruder, and relates to the technical field of rubber regeneration equipment. The
waste gas treatment device comprises a spraying chamber, a preheating chamber and a primary
combustion chamber, wherein a pipeline for communicating the spraying chamber and the preheating chamber is arranged between the spraying chamber and the preheating chamber, and a first
gas supply pipe for communicating the preheating chamber and the primary
combustion chamber is arranged between the preheating chamber and the primary
combustion chamber; thespraying chamber is communicated with an intake
pipe, a plurality of spraying heads are arranged at the top in the spraying chamber, and a preheating
electric heating pipe is arranged on the inner wall of the preheating chamber; a plurality of
layers of catalytic beds arranged up and down are arranged in the primary
combustion chamber, a combustion
electric heating pipe is arranged on the inner wall of the primary
combustion chamber, and the primary
combustion chamber is further connected to a first outlet pipe. A plurality of small
heat transfer pipes which are parallel to each other and arearranged above the catalytic
bed at the uppermost layer are further arranged in the primary combustion chamber, and penetrate through the primary combustion chamber and are communicated with a main
heat transfer pipe for connecting the small
heat transfer pipes. When the device is used,
waste gas can be effectively treated, waste gas emission is guaranteed to be clean and free of
pollution, heat generated by waste gas combustion can be fully utilized, and the energy
utilization rate is increased.