MVR evaporator is a mechanical vapor recompression (MVR) evaporator. Its principle is to use a high-efficiency steam compressor to compress the secondary steam generated by evaporation, convert electrical energy into thermal energy, increase the enthalpy of the secondary steam, and inject the secondary steam with increased thermal energy into the evaporation chamber for heating, in order to achieve the purpose of recycling the existing thermal energy of the secondary steam without the need for external fresh steam, and achieve the purpose of evaporation concentration through self circulation of the evaporator.
Control system temperature, pressure, and motor speed through PLC, industrial computer (FA), configuration, and other forms to maintain system evaporation balance. In theory, using an MVR evaporator saves over 80% of energy, over 90% of condensate water, and reduces footprint by over 50% compared to a traditional evaporator.
The basic principle of MVR is to improve the cleanliness and enthalpy of waste heat steam generated during the evaporation process through countercurrent washing and mechanical recompression, and reuse it to achieve energy-saving and environmental protection goals.
MVR compressors can use centrifugal compressors or Roots compressors. These machines have a higher volumetric flow rate within the compression ratio range of 1:1.2 to 1:2. The evaporation equipment is compact, occupies a small area, and requires less space. It can also eliminate the need for a cooling system. For existing factories that require expansion of evaporation equipment and insufficient space for steam supply, especially in situations where low-temperature evaporation requires condensation of chilled water, both investment savings and good energy-saving effects can be achieved.

MVR除開車啟動(dòng)外，整個(gè)蒸發(fā)過程中無生蒸汽（有些物料來料溫度低，預(yù)熱至沸點(diǎn)需要少量蒸汽）。多效蒸發(fā)過程中，蒸發(fā)器某一效必須額外給其熱源能量，使其溫度(壓力)提高；蒸汽噴射泵（TVR）只能壓縮部分二次蒸汽。而MVR蒸發(fā)器則可回收利用蒸發(fā)器中所有的二次蒸汽。蒸發(fā)一噸水需要耗電為25-70度電，生蒸汽經(jīng)濟(jì)性相當(dāng)于多效蒸發(fā)的20-30效，減少了對(duì)外部加熱及冷卻資源的需求，降低能耗，減少污染。

能耗對(duì)比：

以蒸發(fā)量5t/h,含鹽量10%的氯化鈉溶液蒸發(fā)進(jìn)行對(duì)比：

 MVR蒸發(fā)器適用于牛奶、葡萄糖、有機(jī)酸、VC、木糖、制藥、化工、生物工程、環(huán)保工程、廢液回收、造紙、制鹽等行業(yè)進(jìn)行低溫濃縮。MVR適用于沸點(diǎn)升高不太高，蒸發(fā)夾帶小的物料。