Vapor-recovery device for air separation equipment

A vapor-recovery device for air separation equipment is composed of a water tank and a vapor recovery heat exchanger. A vapor condensing pipe of the vapor recovery heat exchanger is arranged in an outer sleeve, two ends of the outer sleeve are connected with a cooling water inlet pipe and a cooling water outlet pipe respectively, and two ends of the vapor condensing pipe are connected with a molecular sieve vapor discharging pipe and a water tank water inlet pipe respectively. A water tank water outlet pipe is connected with a water washing tank of an air compressor vane wheel. A water pump is arranged on the water tank water outlet pipe, a water pump outlet pipe is connected with the water washing tank of the air compressor vane wheel and a water cooling tower respectively, and liquid level control water charging valves are arranged on the water pump outlet pipe and a water cooling tower connecting pipe. The water cooling tower is connected with the water tank through a water pipe, and a liquid level control