Sulfuric acid waste liquid recovery device

The utility model discloses a sulfuric acid waste liquid recovery device which comprises a refrigerating unit and a reaction tank with a cooling cavity channel, a cooling liquid outlet pipe and a cooling liquid inlet pipe are arranged on the side wall of the reaction tank, and a cooling liquid circulating pipe in the refrigerating unit is connected with the cooling liquid outlet pipe and the cooling liquid inlet pipe to form a circulating cooling loop. A liquid discharge pipe is arranged at the bottom of the reaction tank, a vacuum filter is connected to the liquid discharge pipe, the water outlet end of the vacuum filter is connected with a suction filtration tank through an acid liquid pipe, the liquid outlet end of the suction filtration tank is connected with a recycled acid storage tank, a new sulfuric acid adding pipe is arranged at the top of the reaction tank, and a water outlet pipe is arranged at the bottom of the reaction tank. The new sulfuric acid adding pipe is connected with a concentrated sulf