A forced circulation evaporator relies on an external force — a circulation pump — to circulate the liquid. Its heating chamber comes in two structural types: horizontal and vertical, with the liquid circulation rate adjusted by the pump. Based on the position of the inlet and outlet of the separation chamber, it can be divided into a forward circulation forced evaporator and a reverse circulation forced evaporator; when the inlet is located above the outlet, it is called forward circulation, and vice versa for reverse circulation. The reverse circulation forced evaporator has more advantages.