MVR Evaporator ( Mechanical Vapor Re-compression ，mechanical vapor recompression) effectively removes and recovers ammonia nitrogen from wastewater containing high levels of ammonia through a series of highly efficient evaporation and condensation processes. The following are MVR the main steps and principles of using an evaporator to treat wastewater with high ammonia nitrogen levels :

1 、Pre-treatment

Before entering the MVR evaporator, wastewater with high ammonia nitrogen levels usually needs pre-treatment to remove suspended solids, oils, and other large particulate impurities to ensure the smooth progress of subsequent processing steps.

2 、Heating and Evaporation

The pre-treated wastewater enters MVR the heating section of the evaporator, where it is heated using steam or hot air as a heat source.

As the temperature rises, the water in the wastewater gradually evaporates, forming secondary steam. This secondary steam is rich in ammonia and other volatile substances.

3 、Secondary Steam Compression and Reheating

The secondary steam produced by evaporation is introduced into a steam compressor, where its pressure and temperature are increased through compression.

The compressed secondary steam re-enters the heating chamber to reheat the original solution, achieving the recycling of thermal energy.

4 、Evaporation and Separation

In MVR the evaporation section of the evaporator, the heated wastewater continues to evaporate, producing more secondary steam.

A gas-liquid separator separates the steam from the concentrated liquid. The steam enters the next cycle, while the concentrated liquid undergoes further processing or recovery according to processing requirements.

5 、Condensation and Recovery

The separated steam condenses into water in the condenser, enabling water recovery and reuse.

The condensed water may contain a certain amount of ammonia and other volatile substances, and further processing or recovery is required depending on the specific circumstances.

6 、Special Treatment ( Such as ammonia stripping )

For wastewater with high ammonia nitrogen levels, MVR evaporators can also be combined with ammonia stripping technology to further improve ammonia removal efficiency.

In the ammonia stripping tower, wastewater and steam come into countercurrent contact, and ammonia is carried out by the steam and sent to a reboiler as a heat source after compression.

The condensed dilute ammonia water can be further rectified by a rectification column to produce ammonia water of different concentrations for industrial reuse.

7 、Automated Control

MVR Evaporator systems are usually equipped with PLC control systems that can monitor the system's operating status in real time and automatically adjust operating parameters.

This not only ensures the efficient and stable operation of the system, but also reduces the cost and error rate of manual operation,

Summary

MVR Evaporators effectively treat wastewater with high ammonia nitrogen levels through efficient evaporation, condensation, and heat recovery processes. Combining it with ammonia stripping technology can further improve ammonia nitrogen removal efficiency and reduce energy consumption. At the same time, automated system control ensures processing stability and reliability. This treatment method not only meets environmental protection requirements but also achieves resource recovery and maximizes economic benefits.