Refining and purifying device

The utility model relates to the technical field of purification devices, in particular to a refining purification device. The crystallization tank comprises a crystallization tank body, a discharging port is formed in the outer surface of the crystallization tank body, a protection device is arranged on the outer surface of the crystallization tank body, a supporting device is arranged at the bottom of the outer surface of the crystallization tank body, the protection device comprises a clamping block and a fixing rod, the outer surface of the crystallization tank body is fixedly connected with a clamping frame, and the fixing rod is fixedly connected with the clamping frame. A hexagonal clamping seat is fixedly connected to the top of the outer surface of the clamping frame, a clamping hole is formed in one side of the outer surface of the clamping frame, and a fixing block is fixedly connected to one side of the outer surface of the clamping frame, so that the problem that dust is likely to adhere to the d