Cooling device for coal gasification discharged wastewater

Abstract

The utility model relates to a coal gasification discharged waste water cooling device which comprises a waste water inlet pipe connected to a heat exchanger water inlet on a heat exchanger, a waste water pump and a first control valve are sequentially arranged on the waste water inlet pipe, a heat exchanger water outlet of the heat exchanger is connected with a waste water outlet pipe, and a second control valve is arranged on the waste water outlet pipe. The utility model has the beneficial effects that the ash water flow direction is increased by adding the water inlet and the water outlet, and the ash water direction is changed by switching the state of the valve after heat exchange for a certain time, so that accumulated slag in heat exchange equipment is backwashed, and the scaling time of a pipe wall is prolonged; meanwhile, the circulating pump is additionally arranged, secondary heat exchange of grey water is achieved, the heat exchange time is prolonged, and the effect of reducing the grey water temperature is obvious.

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