Residual heat utilization apparatus of gangue brick tunnel kiln

The utility model discloses a device for utilizing residual heat in a gangue brick tunnel kiln. The device comprises a boiler drum, a heat collecting tube, a left upper collection tank, a left lower collection tank, a kiln body, a right lower collection tank, a right upper collection tank, a drop pipe , an air duct, a water inlet pipe and an air outlet pipe; the water inlet pipe and the air outlet pipe are arranged on the upper part of the boiler drum; the boiler drum is lengthwise arranged on the upper part of the kiln body along the tunnel kiln; the left upper collection tank, the left lower collection tank, the right collection tank and the right collection tank are fixed on the inside of the wall body of two sides of the kiln body; heat collecting pipes are evenly, alternately and breadthwise arranged on the upper part of the inside of the kiln body; the left lower collection tank and the right lower collection tank are respectively connected to the lower part of the boiler drum by the drop pipe and commu