MVR Multi effect Evaporator

MVR stands for Mechanical Vapor Recovery. MVR is a technology that reuses the energy generated by its own secondary steam to reduce the demand for external energy. This technology is applied in industries such as chemical, pharmaceutical, papermaking, sewage treatment, and seawater desalination.
The working process involves the compression of low-temperature steam by a compressor, which increases the temperature and pressure, increases the enthalpy, and then enters a heat exchanger for condensation to fully utilize the latent heat of the steam. Except for starting the car, only a small amount of steam is required during the entire evaporation process.
In the process of multi effect evaporation, the secondary steam of one effect of the evaporator cannot be directly used as the heat source of the main effect, but can only be used as the heat source of the secondary effect or several secondary effects. As a heat source for this effect, additional energy must be provided to increase its temperature (pressure). The steam jet pump can only compress a portion of the secondary steam, while the MVR evaporator can compress all the secondary steam in the evaporator The solution is circulated in a falling film evaporator through a material circulation pump in the heating tube. The initial steam is heated by fresh steam outside the tube, which heats and boils the solution to produce secondary steam. The generated secondary steam is sucked in by a turbocharged fan, and after being pressurized, the temperature of the secondary steam increases and enters the heating chamber as a heating source for circulating evaporation. After normal start-up, the turbo compressor sucks in secondary steam, which is then pressurized and converted into heated steam. This continuously circulates and evaporates, and the evaporated water is eventually discharged as condensed water.

Main principle:
Mechanical vapor recompression (MVR) evaporator utilizes the secondary steam generated in the evaporator, which is compressed by a compressor to increase pressure, temperature, and enthalpy. It is then sent to the heating chamber of the evaporator as heating steam, maintaining the boiling state of the feed liquid, while the heating steam itself condenses into water. In this way, the steam that was originally intended to be discarded is fully utilized, latent heat is recovered, and thermal efficiency is improved. The economy of steam production is equivalent to 20 effects of multi effect evaporation, reducing the demand for external heating and cooling resources, energy consumption, and pollution.