The secondary steam from the evaporator is compressed by the compressor, the pressure and temperature rise, the enthalpy increase, and then sent to the heating chamber of the evaporator as heating steam, so that the material liquid is maintained in a boiling state, and the heating steam itself is condensed into water. In this way, the original steam to be discarded has been fully utilized, the latent heat has been recovered, and the thermal efficiency has been improved, and the economy of the steam is equivalent to 30 effects of multi-effect evaporation. The whole evaporation system does not need to replenish the raw steam when it is in normal operation.
In an MVR falling film evaporator, liquid and steam flow downward and in parallel. The feed liquid is preheated to boiling temperature by the preheater, and a uniform liquid film is formed through the liquid distribution device at the top into the heating tube, and part of the tube evaporates.
Secondary steam and concentrated liquid flow down the tube. The residence time of the feed liquid in the evaporator is short, which can adapt to the evaporation of the heat sensitive solution. In addition, falling film evaporation is also suitable for high viscosity solutions, with a viscosity range of 0.05 to 0.4Pas. Falling film evaporator is easy to burst the foam in the tube, so it is also suitable for the evaporation of foaming materials.
Because falling film evaporator is liquid film heat transfer, so its heat transfer coefficient is higher than other forms of evaporator; In addition, falling film evaporation has no liquid column static pressure, and the heat transfer temperature difference is significantly higher than other forms of evaporator. Therefore, it can achieve good heat transfer effect, one-time investment is the least, is the owner's preferred evaporator form.
Features:
(1) Short residence time, will not cause degradation of heat-sensitive materials.
(2) Due to the film flow, the heat transfer coefficient K value is relatively large.
(3) The pressure drop is small, so the pressure and temperature on the process side of the heat exchanger are nearly constant.
(4) Because the process fluid flows under gravity, rather than being driven by temperature difference, it allows for a more economical low temperature difference.
(5) The boiling is convective boiling, so the state of the heat exchange tube surface has little influence on the boiling.
(6) MVR technology coupled falling film evaporator compared with the traditional three-effect evaporator, can save 60%-70% of the energy cost.

Mvr-forced circulation continuous crystallizer (MVR-FC) is composed of crystallization chamber, circulation tube, circulation pump, heat exchanger, etc. The crystallization chamber has a conical bottom, after the crystal slurry is discharged from the cone bottom, it is pumped through the heat exchanger through the axial flow circulation of the circulation pipe, and it is heated or cooled, and then it enters the crystallization chamber again, so the circulation is continuous, so the crystallizer belongs to the crystal slurry circulation type. The slurry discharge outlet is located near the bottom of the cone of the crystallization chamber, while the feed port is at a lower position below the discharge port. And the secondary steam from the upper part of the crystallizer after gas-liquid separation into the compressor compression heating and pressure, and then re-into the heating chamber heat exchange, to maintain the evaporation temperature of the system. No additional steam is required during normal and stable operation of the system.
Features:
1. Large heat transfer coefficient, anti-scaling, strong adaptability, easy to clean
2. The evaporator is heated evenly in the tube through forced circulation, and the heat transfer coefficient is high, which can prevent the phenomenon of "dry wall"
3. Continuous feed in and out, feed liquid and required concentration to achieve automatic control
4. Suitable for easy crystallization or high viscosity (salt) solution

Mechanical steam recompression (MVR) evaporator, distillation tower, the principle is to use high energy efficiency steam compressor compression evaporation generated by the secondary steam, convert electrical energy into heat energy, increase the enthalpy of the secondary steam, increase the heat energy of the secondary steam into the evaporation chamber for heating, in order to achieve the recycling of secondary steam existing heat energy, so that no external fresh steam can be required. The purpose of evaporation and concentration is realized by self-circulation of evaporator.
Scope of application:
Mechanical steam Recompression (MVR) evaporator, suitable for milk, glucose, starch, monosodium glutamate, xylose, pharmaceutical, chemical, biological engineering, environmental protection engineering, waste liquid recovery, paper making, salt and other industries for low temperature concentration.