Product overview
The MVR evaporator uses a compressor to increase the energy of the secondary steam, and utilizes the increased energy of the secondary steam to recover its latent heat. Specifically, the secondary steam generated by the evaporator is adiabatically compressed by a compressor to increase its pressure and temperature, and then sent as heating steam into the heating chamber of the evaporator for condensation and heat release. Therefore, the latent heat of the steam is recovered and utilized.

Principle of Plate MVR Evaporator
The material to be evaporated is preheated by the preheater and enters the plate evaporator. The material exchanges heat with the heating steam in the evaporator and evaporates. The gas-liquid mixture enters the separator for gas-liquid separation. The generated secondary steam enters the compressor, and after being compressed by the steam compressor, it is sent to the plate evaporator as heating steam. After heating steam and exchanging heat with materials, it condenses into water, which enters the preheater to exchange heat with the materials and recover energy from the preheated materials. The system has no secondary steam discharge, saving a lot of energy.

2、 Equipment composition
High heat transfer efficiency: The design of the corrugated plate aims to achieve a high thermal conductivity of the thin film, resulting in high heat transfer efficiency. Generally, the heat transfer coefficient K value of the plate evaporator is between 3000 and 6000 w/㎡ Within the temperature range of ℃, this indicates that the plate evaporator only needs 1/2 to 1/4 of the surface area of the shell and tube evaporator to achieve the same evaporation effect.

Small footprint and easy maintenance: The structure of the plate evaporator is extremely compact, occupying only 1/3 to 1/4 of the space of the tube type falling film evaporator under the same evaporation capacity, and its height is only about 1/10 of the tube type falling film evaporator. Maintenance only requires loosening the clamping screw, which can fully contact the surface of the heat exchange plate within the original space range, and it is easy to disassemble and assemble.

The heat exchange area of the equipment can be adjusted: the size of each heat element (plate) can range from 0.03 square meters for small ones to over 4 square meters for large ones. The heat exchange area of each device can range from 0.5 square meters for small ones to over 1900 square meters for large ones. Due to the easy disassembly of heat exchange plates, appropriate heat transfer efficiency and capacity can be achieved by adjusting the number of heat exchange plates or changing the process. As long as the evaporator intermediate frame is used, the heat exchange plate components have multiple unique functions. This provides users with the possibility to change the processing capacity and heat transfer coefficient K value or add new features at any time.

Small heat loss: Due to its compact structure and small volume, the external surface area of the evaporator is also very small (compared to a tubular falling film evaporator), resulting in minimal heat loss. Typically, the equipment no longer requires insulation.

Less pressure loss: under the condition of the same heat transfer coefficient, the pressure loss of the plate evaporator can be controlled within 1/3 of that of the tube evaporator by reasonably selecting the flow rate.
Safe and reliable use: Two seals are designed on the sealing device between the plates, and signal holes are also provided. In case of leakage, it can be eliminated from the outside of the evaporator, which not only prevents the mixing of steam and materials, but also serves as a safety alarm.

Evaporation characteristics
Low vacuum pressure drop: The vaporized gas of the material is sent from the heating surface to the external condenser, resulting in a certain pressure difference. In a typical evaporator, this pressure drop (Δ p) is usually quite high, sometimes even too high to be acceptable. The scraper type thin film evaporator has a large gas passage space, and the pressure inside the evaporator can be regarded as almost equal to the pressure in the condenser. Therefore, the pressure drop is very small, and the vacuum degree can reach 5mmHg.
Low operating temperature: Due to the above characteristics, the evaporation process can be maintained under high vacuum conditions. Due to the increase in vacuum degree, the corresponding boiling point of the material rapidly decreases, so the operation can be carried out at lower temperatures, reducing the thermal decomposition of the product.

Short heating time: Due to the unique structure of the scraper type thin film evaporator, the scraper has a pumping effect, which makes the residence time of the material in the evaporator very short; In addition, the high-speed turbulence of the thin film on the heated evaporator prevents the product from remaining on the surface of the evaporator. Therefore, it is particularly suitable for the evaporation of thermosensitive materials.

High evaporation intensity: The decrease in boiling point of the material increases the temperature difference between the same heat medium; The function of the scraper reduces the thickness of the turbulent liquid film and lowers the thermal resistance. At the same time, during this process, the material is suppressed from forming walls and scaling on the heating surface, accompanied by good heat exchange, thus improving the overall heat transfer coefficient of the scraper type thin film evaporator.

High operational flexibility: It is precisely due to the unique performance of the scraper type thin film evaporator that it is suitable for processing materials that are sensitive to heat and require smooth evaporation, high viscosity, and materials with rapidly increasing viscosity with increasing concentration. Its evaporation process can also be smoothly evaporated. It can also be successfully applied to the evaporation and distillation of materials containing solid particles, crystallization, polymerization, scaling, and other situations.
5、 Technical parameters

Model	2500 type	user	Yunnan
Sector	Biomedical (concentrated)	Design processing capability	≥2.5t/h
Feed concentration	15%	Discharge density	45%
预热形式	steam	设备材质	316L