Heat pump low-temperature salt separation wastewater treatment device

The utility model discloses a wastewater treatment device for low-temperature salt separation of a heat pump. A heat source of a heat pump is used for heating, evaporating and concentrating waste water, a cold source of the heat pump is used for freezing and cooling the waste water, sodium sulfate is separated out by utilizing the characteristic that the solubility of sodium sulfate changes alongwith temperature changes, and secondary steam is used for evaporative crystallization of sodium chloride and hot-melting purification crystallization of sodium sulfate. According to the utility model,a heat source and a cold source of the heat pump are fully utilized for wastewater salt separation treatment, so that the energy consumption is extremely low; due to low-pressure and low-temperatureevaporation, the requirement on equipment is low, a large amount of non-metallic materials can be used, and the investment is less; and the device has the advantages of low vibration and low noise. 本实用新型公开了一种热泵低温分盐的废水处理装置，使用热泵的