Plate MVR double-effect evaporator

The plate-type MVR double-effect evaporator is a rapid and energy-saving evaporation device that combines mechanical vapor recompression (MVR) technology with a double-effect evaporation process. It achieves rapid heat exchange through a plate heat exchanger and is suitable for various industrial applications, particularly excelling in treating high-salinity, high-concentration, and high-viscosity wastewater and for solution concentration.

1. Working Principle of the Plate-Type MVR Double-Effect Evaporator

First-Effect Evaporation: The feed liquid is first preheated in a preheater and then enters the first-effect plate-type rising film evaporator. Inside the evaporator, the feed liquid rapidly evaporates under the action of heating steam, and the generated secondary steam is sent to the steam compressor.

Steam Compression: The steam compressor compresses the secondary steam, increasing its temperature and pressure, making it high-temperature, high-pressure steam.

Second-Effect Evaporation: The compressed steam, as a heat source, enters the second-effect forced circulation evaporator for further heating and evaporation of the material. The secondary steam generated in the second-effect evaporator is again drawn into the compressor, forming a cycle.

Condensation and Recovery: The steam generated during the evaporation process is condensed into water in the condenser, recovering heat and reducing energy waste. 

2. Plate-Type MVR Double-Effect Evaporator System Design

Single-Effect Plate Rising Film Evaporator: Utilizes the rapid heat transfer performance of plate heat exchangers to achieve rapid evaporation.

Double-Effect Forced Circulation Evaporator: Forces material circulation through a circulation pump, improving evaporation efficiency.

Steam Compressor: Compresses secondary steam, increasing its temperature and pressure, achieving heat energy recycling.

Condenser: Used to condense secondary steam and recover condensate.

Preheater: Increases the initial temperature of the feed liquid, reducing evaporation time.

3. Advantages of Plate-Type MVR Double-Effect Evaporator

Significant Energy Saving: Significantly reduces energy consumption by recovering and reusing the latent heat of secondary steam.

Compact Structure: The compact design of the plate heat exchanger reduces the equipment's footprint.

Easy Cleaning and Maintenance: The detachable design of the plate heat exchanger facilitates cleaning and replacement, reducing maintenance costs.

Strong Adaptability: Suitable for a variety of materials, including high-viscosity and easily scaling liquids. 

4. Application Scenarios of Plate-Type MVR Double-Effect Evaporators

Wastewater Treatment: Used to treat high-salinity, high-concentration industrial wastewater, achieving wastewater reduction and resource recovery.

Solution Concentration: Used for solution concentration in chemical, pharmaceutical, and food industries.

Liquid Food Production: Used for the concentration of liquid foods such as fruit juice and milk.

Plate-type MVR double-effect evaporators, with their rapid heat exchange and energy-saving characteristics, have become a good choice in modern industrial evaporation processes.