Efficient cooling compound fertilizer granulation equipment and using method thereof

Efficient cooling compound fertilizer granulation equipment comprises a supporting mechanism, a stirring mechanism, a gear mechanism and a cooling mechanism, the supporting mechanism comprises supporting legs and a supporting frame fixedly installed at the upper ends of the supporting legs, a stirrer shell is fixedly installed on the inner side of the left end of the supporting frame, and a motoris fixedly installed on the outer side of the left end of the supporting frame; a stirring shaft installed on the motor penetrates through the stirrer shell from left to right, a center gear is fixedly connected to the right end of the stirring shaft and rotationally connected to the inner side of the right end of the supporting frame, an inner gear is rotationally connected to the inner side of the right end of the supporting frame, the inner gear and the center gear are concentric circles, and a side gear is meshed between the inner gear and the center gear. The inner gear is connected withthe stirrer shell through