Residual concrete recovery pretreatment system

The utility model discloses a residual concrete recovery pretreatment system which comprises a base, the top of the base is fixedly connected with supporting columns arranged in an annular array mode, the tops of the supporting columns are fixedly connected with a supporting ring, and the inner wall of the supporting ring is fixedly connected with a furnace body. The lower end of the outer wall of the furnace body is fixedly connected with air blowers arranged in an annular array through bolts, a combustion-supporting assembly is arranged on the outer wall of the furnace body and located on the tops of the air blowers, a circulation assembly is arranged on the right side of the outer wall of the furnace body, and the combustion-supporting assembly comprises a first gas guide plate, a second gas guide plate, a first gas guide pipe, a second gas guide pipe, a nozzle and a first electric valve. According to the device, the combustion-supporting assembly is connected with the external oxygen-enriched pipeline, so