Technology Develop Background 

1. For the problem of industrial waste water high concentration salt, it can be solved and reach zero carbon emission by evaporation technology, but the energy consumption during evaporation is very costly;

2. Sludge drying is an important step to realize the harmless and resourceful treatment of sludge. The existing drying process consumes a lot of energy;

3. Distillation is the main separation technology in chemical production, with a wide range and large scale, but generally has low thermal efficiency and high energy consumption;

4. MVR technology can use a small amount of electric energy to reuse the phase change heat of the evaporation, drying, and rectification process, reduce the energy consumption and operating costs of related industries dramatically; 

Technical Process Schematic

水蒸气 steam 压缩机 compressor 热交换器 heat exchanger 分离器 separator 原料进 source water inlet 冷凝水出 condensate water outlet 预热板换 Pre-heat exchanger 冷凝水箱 condensate water box 浓缩液排出 concentrate discharge 

Application Instruction 

　　MVR(Mechanical Vapor Re-compression) is an advanced evaporation technology in domestic and foreign evaporation field. This technology compresses the secondary steam generated in the evaporation process by a steam compressor, increases the pressure and temperature of the secondary steam, and returns it to the evaporator as a heat source to heat the original solution. This process makes full use of the latent heat of the secondary steam to achieve cyclic heating. The purpose of replacing fresh steam, saving a lot of energy, greatly reducing operating costs, and truly achieving the triple effect of energy saving, emission reduction and water saving.

MVR technology is widely used in the treatment of high-salt waste water and industrial production.

Technical Advantages

1. MVR evaporation crystallization technology can separate various salt crystals in waste water to obtain high-quality distilled water;

2. Using the principle of compression heat pump, replace the fresh new steam heat source with its own exhausted steam through a small amount of electricity consumption;

3. The energy consumption for evaporating one ton of waste water is as low as 20 kWh, and there is no other energy consumption;

4. Drying one ton of sludge (80% 40%), the energy consumption is as low as 100 kWh, and the comprehensive SMER>7;

5. In the rectification process, this technology uses 40-100 kWh of electricity to replace one ton of steam consumption in the original process.

Typical Process

1. Evaporation (concentration) crystallization

蒸馏水Distilled water 废水Waste water 预热Preheat 冷凝水Condensate Water 强制循环加热器Forced circulation heater MVR蒸汽压缩机 MVR steam compressor 蒸汽steam  结晶器Crystallizer 离心机Centrifuge 出盐Salt out 母液罐Mother liquor tank

2、 Sludge drying

压缩机compressor 湿物料Wet material 干物料Dry material 干燥器Dryer 水泵Water pump 脱出水污水处理Sewage treatment 冷凝水收集Condensate collection 气液固三相分离器Gas-liquid-solid three-phase separator

3、Rectification

压缩机compressor 冷凝泵Condensate pump 精馏塔Distillation tower 回流Backflow 进料Material feed 塔顶产品Tower top products 塔釜液Tower liquid 原料进Raw materials 预热器Preheater 出料泵Discharge pump 循环泵Circulation pump 再沸器Re-boiler

4、Zero discharge of desulfurization waste water:

锅炉Boiler 省煤器Economizer 废水蒸干塔Waste water evaporation tower 余热暖风器Residual heat heater 空气预热器Air preheater 空气Air 电除尘器Electric dust collector 烟气冷却器Flue gas cooler 20wt%浓盐水20wt% concentrated brine

5、MVR mechanical vapor recompression system

清水会用Water reuse 脱硫塔Desulfurization tower 烟囱Chimney