Drainage device of heat exchanger

The utility model relates to the technical field of heat exchangers, in particular to a drainage device of a heat exchanger, which comprises a drainage pipe, a temporary storage mechanism used for temporarily storing disintegrating slag in water is mounted on the drainage pipe, the temporary storage mechanism comprises an outer shell A, a sleeve shell, an outer shell B, a flow guide layer, an inner container and a reinforcing rod, and the outer shell A is fixedly connected to the bottom end of the drainage pipe. The outer side of the outer shell A is in threaded connection with the sleeve shell, the bottom end of the sleeve shell is fixedly connected with the outer shell B, and the inner side of the bottom end of the outer shell B is fixedly connected with the flow guide layer. By means of the temporary storage mechanism, when the drainage pipe is opened, large disintegrating slag in the drainage pipe can fall into the outer shell B to be collected, water scale can be temporarily stored conveniently, operatio