Thermal Vapor Recompressor (TVR)

In multiple effect evaporator evaporated water vapour from previous effect progressively utilize for next effect to reduce the steam consumption. In multiple-effect evaporators with TVR, the heating medium in the first calandria is the product vapor from one of the associated effects, compressed to a higher temperature by means of a thermocompressor which will increase the pressure vapour of associated effect using high pressure steam. This reduces the Steam requirement of Evaporation Plant.

Mechanical Vapor Recompression (MVR)

In evaporators with MVR, the heating medium in the first effect is vapor developed in the same effect, compressed to a higher temperature by means of a high-pressure fan (MVR). Any excess vapor from the high heat section is condensed or may be utilized in a high concentrator. MVR normally have very high Efficiency and will result very low Energy cost for Evaporation. It is normally suitable for low concentrated liquids.