Explore the most widely used MVR high-salinity wastewater evaporation process

The purity produced by the MVR (Mechanical Vapor Recompression) evaporation system depends on the impurity content of the raw water and the specific treatment requirements. For wastewater projects with high impurity content in the raw water, it is expensive and complicated to produce industrial-grade salt, and the salt can be treated as solid waste, thereby reducing the treatment standards.

Due to the diversity of types of salty wastewater, the steam compressor temperature rise required for different types of wastewater is also different. This leads to differences in the installed power of the system. On average, the power consumption per ton of water evaporated is between 20 and 60 kWh, and the consumption of raw steam is very small.

Key pretreatment process for MVR high-salinity wastewater evaporation

Degassing

Function: Remove oxygen, carbon dioxide, and other gases, prevent high-temperature corrosion, reduce the generation of non-condensable gases during evaporation, and improve heat transfer efficiency.
Equipment: Degassing tower

Softening

Function: Reduce the calcium and magnesium ion content in the raw water, reduce hardness, prevent scaling of heat exchange tubes, and improve heat transfer efficiency.
Equipment: Softening equipment

COD removal

Function: Remove organic matter that may adhere to the heat exchange surface or affect the quality of condensed water during evaporation.
Equipment: COD removal equipment

Preheating

Function: Use evaporated condensed water or steam to preheat raw wastewater to reduce energy consumption save energy, and maintain system heat balance.
Equipment: Preheater

MVR evaporator working process

Unlike traditional single-effect or multi-effect evaporators, the MVR system is a single-effect evaporator with the integrated energy-saving function of a multi-effect evaporation system.

Initial heat exchange:

The raw liquid is preheated by the feed pump through the condensate heat exchanger.

Evaporation and concentration:

The preheated liquid enters the forced circulation evaporator and is discharged after being concentrated to the designed concentration. If the foam is generated during the process, the defoaming agent needs to be added to eliminate the foam.

Crystallization and centrifugation:

The concentrated slurry is centrifuged by a centrifuge to separate the crystallized solid salt particles from the concentrated liquid. The mother liquor returns to the evaporator and continues to evaporate and concentrate, while the crystallized salt is discharged from the system.

Steam compression and reuse:

The secondary steam from the separator is compressed by the steam compressor to increase its pressure and temperature. The high-temperature steam condenses into water after exchanging heat with the material in the heating chamber of the evaporation system, enters the condensate preheater to recover heat, and then is discharged from the system, maximizing energy efficiency.

Non-condensable gas treatment:

Non-condensable gas is directed to the heat exchanger for further raw material preheating.

Automation control:

Each process parameter is monitored and controlled by the PLC system, and real-time alarms and centralized supervision are carried out through industrial computer software.

Energy Efficiency and Process Benefits

During normal operation, the MVR evaporator produces low-temperature secondary steam, which is compressed by the steam compressor to increase its pressure, temperature, and enthalpy. This compressed steam is used as heating steam for the evaporation process. By recovering and reusing latent heat, the system minimizes the need for live steam after startup, significantly improving thermal efficiency.

The MVR evaporation system reduces the need for circulating cooling water, reduces energy consumption, and is suitable for compact designs in small spaces.

Application of MVR evaporation technology

MVR evaporation technology has a wide range of uses, including:

Evaporation concentration

Evaporation crystallization

Low-temperature evaporation

Compared with traditional evaporators, MVR systems provide:

Wide adaptability to different raw materials

High thermal efficiency and low energy consumption

Compact structure and strong mobility

Integrated multi-effect functions and cost savings

The high degree of automation and low operating costs

Conclusion

The MVR evaporation and crystallization system combines exceptional energy efficiency, adaptability, and compact design to revolutionize high-salinity wastewater treatment. With its ability to recover latent heat and significantly reduce operating costs, it sets a new standard for sustainable wastewater treatment. For industries facing high-salinity wastewater challenges, MVR technology offers a reliable, economical, and environmentally friendly solution.

Why choose WTEYA Group?

* Tailor-made solutions: Every enterprise has unique needs. WTEYA Group specializes in providing customized water treatment solutions, taking into account wastewater type, treatment scale, and specific operational requirements.

* Proven expertise: Provided efficient and reliable water treatment solutions for many well-known companies around the world. Successfully implemented projects for listed companies such as Foxconn, Huawei, Rongbai, etc., with more than 100 project cases, and won the trust and praise of customers.

* Cutting-edge technology: Our MVR systems are designed for superior performance, helping you achieve zero emissions and comply with environmental regulations.

* Competitive pricing: We not only offer high-performance MVR evaporators but also cost-effective solutions that minimize your investment without compromising quality. Let WTEYA Group design an MVR evaporation system that perfectly fits your needs, delivering advanced technology and financial efficiency.

Let WTEYA Group design an MVR evaporation system that perfectly suits your requirements. Contact us today for a detailed quote:

*Email: info@wteya.com

*WhatsApp: +86-18002840855

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