MVR Evaporator: Mechanical Vapor Recompression Energy-Saving System

High-Efficiency Energy Saving via Steam Recycling Technology
Mechanical Vapor Recompression (MVR) Evaporator is an advanced energy-saving evaporation equipment that achieves efficient recycling of secondary steam. By compressing low-grade secondary steam to improve its energy level and reusing it as a heat source, it drastically reduces the demand for external energy, making it a benchmark for energy-saving evaporation in various industries.

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Working Principle

The core of MVR technology lies in the cyclic reuse of secondary steam, realizing the efficient utilization of latent heat. The specific process is as follows:

● Secondary Steam Generation: The feed liquid in the evaporator is heated and boiled, generating secondary steam (low pressure, low temperature, and originally to be discarded).

● Steam Compression: The secondary steam is drawn into a compressor, where it is compressed to increase pressure and temperature, and its enthalpy (heat content) is significantly enhanced.

● Reuse as Heating Steam: The compressed high-grade steam is sent to the heating chamber of the evaporator to provide heat for the boiling of the feed liquid, maintaining the continuous evaporation process.

● Condensation Recovery: The high-grade steam releases latent heat after heating the feed liquid and condenses into water, which can be collected for reuse or discharged up to standard.

This cycle realizes the full utilization of originally wasted secondary steam. The economy of live steam is equivalent to that of a 30-effect multi-effect evaporation system, greatly reducing the demand for external heating and cooling resources.

Core Technology & Energy-Saving Mechanism

MVR (Mechanical Vapor Recompression) refers to the technology that compresses low-grade secondary steam (from evaporation, distillation, etc.) which is low in temperature and pressure and cannot be directly used, to increase its temperature and pressure. The upgraded steam is then reused as a heat source to heat the material to be evaporated.

Key Function of MVR

Improve the quality of steam (increase temperature and pressure) rather than create new energy. It converts a small amount of electrical energy into high-grade thermal energy, thereby reducing the system's demand for external energy and achieving efficient energy saving.

Energy Consumption Analysis in Evaporation Concentration

During the evaporation process, the medium undergoes a "phase change" from liquid to vapor, which is the main energy consumption link. The specific heat capacity of water is 1 kcal/kg·℃—heating 1 kg of water from 0℃ to 100℃ (boiling point) only requires 100 kcal of heat. However, vaporizing 1 kg of 100℃ water into steam of the same temperature requires 539 kcal of heat, which is 539 times the heat required to raise the temperature of the same weight of water by 1℃. MVR precisely recovers this large amount of latent heat in the secondary steam, realizing energy saving.

Key Advantages

Ultra-High Energy Saving

Reuses secondary steam latent heat, with energy consumption only 1/3 to 1/5 of traditional single-effect evaporators and 1/2 of multi-effect evaporators.

Reduced External Dependence

No or minimal external live steam required; the built-in compression system reduces the demand for cooling water and cooling towers.

Stable Operation

Adopts mature compression and control technology, with stable evaporation temperature and consistent product quality.

Compact Structure

Compared with multi-effect evaporators with the same capacity, it has a smaller footprint and saves workshop space.

Wide Adaptability

Suitable for various evaporation, concentration, crystallization and salt separation processes, and can handle different types of materials.

Application Fields

Our MVR Evaporator is widely used in evaporation, concentration, crystallization, miscellaneous salt separation and drying processes in various industries, providing efficient and energy-saving solutions for industrial production and wastewater treatment:

Chemical & Dyeing Industry

Petrochemical, Coking & Coal Chemical Industry

Metallurgy & Smelting Industry

Power Plants & Steel Mills (Desulfurization & Denitrification Wastewater Treatment)

Electroplating Industry & Circuit Board Waste Liquid Treatment

Pharmaceutical & Pesticide Industry

Lithium Battery New Energy Industry

Hazardous Waste Industry & Landfill Leachate Treatment

Food & Biological Fermentation Industry

If you need a customized MVR Evaporator solution based on your material properties, processing capacity or energy-saving goals, or want to know more about technical parameters and quotation information, please feel free to contact our professional team!

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Stable equipment

Mature technology

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