Blast furnace slag flushing water waste heat recovery system

The invention relates to the technical field of slag flushing water treatment, in particular to a blast furnace slag flushing water waste heat recovery system which comprises a flash tank and an absorption tower. A circulating outlet is formed in the bottom of the circulating cavity; the feeding pipe is arranged at the bottom of the tank body, one end is arranged on the outer side of the tank body, and the other end extends into the tank body; the steam pipe is arranged at the top of the tank body, one end is arranged outside the tank body, and the other end extends into the tank body; the circulating pump is connected with the circulating outlet and the circulating inlet through pipelines; the absorption tower comprises: a tower body, the interior of which is a cavity; a steam inlet is formed in the side surface of the tower body and is connected with one end, positioned outside the tank body, of the feeding pipe; extraction openings are formed in the top of the tower body; the water pumping device is arrang