Multi-effect heat pump low-temperature evaporation process and equipment thereof

The invention discloses a multi-effect heat pump low-temperature evaporation process and equipment thereof, relates to the technical field of evaporation and concentration, and aims to supplement liquid in a falling film form to increase a heat transfer coefficient, greatly reduce the use amount of refrigerating and heating media and save the electricity consumption of an evaporator. More energy consumption is saved as much as possible through electricity, any steam heat supply or other auxiliary heat sources are needed, and equipment investment and energy consumption are greatly saved; any external cooling water supply is not needed, consumption of equipment cooling water is saved to a great extent, the position of a steam receiving pipe can be changed through an adjusting mechanism arranged in the separator, the contact distance between steam and a tank body can be shortened, adjustment can be conducted along with change of the liquid level in the tank, and operation is convenient. And liquid drops generate