Kiln cylinder heat collection cover heat recovery system

The utility model relates to the technical field of rotary kilns, in particular to a heat recovery system for a heat collection cover of a kiln cylinder. According to the technical scheme, the heat collecting cover comprises a heat collecting cover body, a disc and a rotating structure, a through hole is formed in one side of the heat collecting cover body, a heat exchange pipe is installed on the inner wall of the through hole, the disc is inserted into the through hole, a hydraulic cylinder is fixed to one side of the disc, and one side of a hydraulic rod movably connected with the hydraulic cylinder penetrates through the disc and extends into the through hole; a support is fixed to one side of a hydraulic rod movably connected with the hydraulic cylinder, a groove is formed in the front end of the support, a rotating structure is arranged on one side of the inner wall of the groove, a motor is fixed to one side of the inner wall of the groove, a transmission shaft arranged on the motor is rotationally con