Automatic auxiliary material returning device in SCR (Selective Catalytic Reduction) catalyst extrusion process

The utility model discloses an automatic auxiliary material returning device in an SCR (Selective Catalytic Reduction) catalyst extrusion process, which relates to the technical field of catalyst manufacturing and comprises a catalyst extruder. By arranging the automatic auxiliary material returning device in the catalyst, waste pug generated in the starting and debugging process of the extruder can be collected in a centralized mode, the blocky catalyst is output after being granulated through the waste pug granulating mechanism, the blocky catalyst can be conveniently fused with other catalyst raw materials in the extruder, the extrusion forming efficiency is improved, and the production cost is reduced. And the conveying mechanism is arranged, so that the granulated waste pug in the waste pug granulating mechanism can be conveyed into the stock bin of the extruder again, manual transfer is reduced, the labor efficiency is improved, and the labor expenditure cost is reduced. Power transmission is carried ou