MVR Evaporator Working Principle

The core working principle of an MVR (Mechanical Vapor Recompression) evaporator is to upgrade the energy of the low-temperature, low-pressure secondary steam generated during evaporation through mechanical compression, thereby achieving heat energy recycling and greatly improving energy efficiency and reducing energy consumption.

The specific process can be divided into the following key steps:

1. Secondary Steam Generation:

After the material enters the evaporator, it is heated, causing the moisture to evaporate and generating low-temperature, low-pressure secondary steam.

2. Mechanical Steam Recompression:

• The secondary steam is drawn into a compressor (such as a centrifugal or Roots compressor) and compressed through mechanical work.

• After compression, the pressure and temperature of the secondary steam increase significantly, its enthalpy increases, and it becomes high-temperature, high-pressure, high-energy steam, capable of serving as a heating source.

3. Compressed Steam Reuse for Heating:

• The high-temperature, high-pressure steam is sent back to the heating chamber of the evaporator to continue heating the material, realizing the release of its latent heat.

• After releasing heat, the steam condenses into liquid water. The condensate can be discharged or further recycled, and its sensible heat can be used to preheat the feed, achieving multi-stage energy recovery.

4. Closed-Loop Energy Cycle:

• The secondary steam is continuously compressed, reused, and condensed, forming a closed-loop thermal energy system. The entire process requires only a small amount of electricity to drive the compressor, greatly reducing the consumption of external fresh steam.

• The system automatically controls and dynamically adjusts parameters such as compressor power, temperature, and pressure to ensure efficient and stable operation.

5.Core Advantages:

1. Significant Energy Saving: Operation requires almost no external steam, consuming only electricity; evaporating 1 ton of water requires only 23-70 kWh.

2. Low-Temperature Evaporation: Suitable for heat-sensitive materials, preventing denaturation.

3. Environmentally Friendly and Efficient: Enables water reuse and hazardous waste reduction; the system is compact, occupies a small area, and has a high degree of automation.

The core working principle of the MVR evaporator is to use a compressor to recompress secondary steam, upgrading its energy and recycling it as a heating source, achieving a closed-loop thermal energy system and a highly efficient and energy-saving evaporation process. This principle makes MVR the mainstream technology in the field of modern energy-saving evaporation.