MVR Evaporator

                                                       Introduction of MVR Evaporator 

1. Working principle :

MVR evaporator, is the abbreviation of English mechanical vapor recompression. mvr is a technology that reuses the energy of its own secondary steam, thereby reducing the need for external energy.

The secondary steam, after the compression of the compressor, the pressure and temperature can be increased, the enthalpy increases, and is sent to the heating chamber of the evaporator as heating steam that is used as steam, so that the material liquid is maintained in the evaporative state, and the heating steam itself transfers heat to the material itself and condenses into water. In this way, the steam originally to be discarded is fully utilized, the latent heat is recovered, and the thermal efficiency is improved.

2. Application range:

1) evaporation and concentration

2) Evaporative crystallization

3) Low temperature evaporation

3. Feature:

1) Low energy consumption and low operating costs;

2) Small footprint;

3) Less supporting public works, less total project investment,

4) Smooth operation, high degree of automation;

5) No primary steam required;

6) The residence time of the product is short due to the common single effect

7) The process is simple, practical, and some load operation characteristics are excellent

8) Low operating cost, can be evaporated below 40 ° C without refrigeration equipment, especially suitable for heat-sensitive materials.

4. MVR compressor type:

In order to make the manufacture of the evaporation device as simple 

as possible and easy to operate, centrifugal compressors and Roots 

compressors can be used. These machines have high volume flow 

rates in the 1:1.2 to 1:2 compression ratio range.

5. MVR evaporator model:

1) MVR falling film evaporator

The raw material liquid is added from the upper tube box of the heat exchanger, and the material is distributed to each heat exchange tube through the liquid distributor, and a uniform liquid film is formed along the inner wall of the heat exchange tube. The liquid film in the tube is heated by the heating steam of the shell in the process of flowing down, and boils and evaporates while flowing down. To the bottom of the heat exchange tube material into concentrated liquid and secondary steam.

2) MVR forced circulation evaporator

The temperature of the material in the heat exchanger heat exchange tube is heated by the steam outside the heat exchange tube. Under the action of the circulating pump, the material rises to the evaporation separator. In the evaporation separator, the material evaporates because the static pressure of the material drops. Evaporation produces secondary steam overflow from the material, the material is concentrated to produce supersaturation and crystal growth, the supersaturated material enters the forced circulation pump, enters the heat exchanger under the action of the circulation pump, and the material is continuously evaporated and concentrated or concentrated crystallization.

3) MVR evaporation OSLO crystallizer

The temperature of the material in the heat exchanger heat exchange tube is heated by the steam outside the heat exchange tube. Under the action of circulating pump, the material rises to the OSLO evaporation crystallizer, in which the material evaporates due to the drop of static pressure.

The evaporation produces secondary steam overflow from the material, and the material is concentrated to produce oversaturation. The suoversaturated solution falls into full contact with the small crystals in the solution in the center tube of OSLO evaporation crystallizer, so that the crystals grow further. The larger crystals are eluted by eluting column, and the larger crystals are precipitated to the bottom of the eluting column and transported to the thickening device by the slurry pump. Smaller crystals continue to grow in the OSLO crystallizer.

4) MVR evaporation DTB crystallizer

DTB crystallizer is a typical circulating crystallizer in the slurry. Due to the flow tube in the crystallizer, the circulation channel is formed, so that the crystal slurry has a good mixing condition, and the supersaturation can be quickly eliminated in the evaporation crystallization, so that the supersaturation of the solution can be at a relatively low level.

Especially suitable for products with steep solubility curves. DTB crystallizer has good performance, high production strength, can produce large grains, and is not easy to scar in the crystallizer. It has become one of the main forms of continuous crystallizer.

6. Parameter: