Mechanical vaporization re-compression system, which is called MVR which principle is to compress the second steam generated by evaporator by high efficiency steam compressor; this process transfers electric energy to heating energy and higher the pressure and temperature of second steam. The second steam with higher temperature will be sent to evaporation room to heat the product for evaporation. So the latent heat of vaporization of the second steam can be circularly used. Making use of less energy which is the mechanical energy of compressor blade wheel as the compression heat pump, energy is added into the heating medium and is circularly used in heating process. Under this circumstance, no need to add first steam as heating medium.
The MVR Process
The temperature of the resulting process steam (vapor) is increased with a radial fan (mechanical vapor recompressor, MVR), and therefore to a higher energy level, and then fed back into the process as fresh heating steam. The energy contained in the steam is not lost; only the energy required to increase the temperature must be additionally raised.
MVR evaporator components:
The liquid material inside the evaporator heated by steam for evaporation. Choose different type evaporator according to different liquid material features.
use to separate vapor and liquid, according to different liquid features choose different type separator(crystallizer), such as normal separator, gravity separator, special design separator (crystallizer ).
Use to keep the whole system vacuum degree, pump some air, fixed gas, liquid entrainment of gas from the evaporator, so as to obtain the whole system stable evaporation process.
Use to transfer liquid and concentrated liquid. According to different liquid features choose different pumps, such as centrifugal pump, displacement pump,screw pump.
Use to compress secondary vapor to supply heating source, improve secondary vapor enthalpy. According to different flow and compression ratio choose different compressor, in the case of pressure rise increase, multistage compressor can be used in series.
MVR Evaporation system control center, by regular motor speed, control valve,flow meter, temperature and pressure, to realize automatic evaporation, cleaning, stop operations and so on. Automatic alarm, automatic protection system is not damaged, keep dynamic balance.
The MVR evaporator energy saving technology is the most advanced international technology of evaporator, only need few live steam (When start evaporator need few live steam, during normal running almost no need live steam), which greatly reduce business operating costs, reduce environmental pollution.
Due to adopt compressor supply heat source, there is little temperature difference which compared with traditional evaporator, and can achieve moderate evaporation,greatly improved product quality and reduce fouling.
No need condenser or only need small size condenser, the structure and process are quite simple, it can be full automatic operation, continuous running, safety and reliable.
This evaporator internal system equipped with CIP clean pipeline, which can achieve clean in place, easy to operate and without dead angle.
Liquid material can be evaporated under low temperature (50-100℃) in this evaporator, the liquid material is uniform and without running material, not easy coking, material heating denaturation is minimal.
Due to use of 100% recycling secondary steam latent heat, completely avoid the use of live steam, so greatly reduced steam consumption.
For heat-sensitive materials can be used with vacuum pump, which can be done in close to absolute pressure under vacuum, so as to realize low temperature evaporation, the minimum evaporation temperature can be 50 ℃.
Simple process control and automation——Because of the small amount of fluid retention, the falling film evaporator can be change according to different vacuum degree/feeding capacity/ concentration/ temperature , which is the basic conditions for stable quality of products.
The handling capacity can be up to 100T/h, with advantages such as small floor space, compact structure, stable operation and so on.
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