MVR evaporator is different from ordinary single effect falling film or multi effect falling film evaporators. MVR is a single evaporator that integrates multiple effect falling film evaporators. It adopts segmented evaporation according to the required product concentration. That is, when the product cannot reach the required concentration after the first pass through the effect, it is pumped by the vacuum pump at the lower part of the effect through the external pipeline of the effect to the upper part of the effect, and then repeatedly passes through the effect to achieve the required concentration.

The interior of the effect body consists of arranged thin tubes, with the product inside and steam outside. During the flow of the product from top to bottom, the area inside the tube increases, causing the product to flow in a film like form to increase the heating surface. A negative pressure is formed inside the effect body through a vacuum pump, reducing the boiling point of water in the product and achieving concentration. The evaporation temperature of the product is around 60 ℃.