5t/h Electrolyte Lithium Extraction MVR Evaporation Concentration System

1.Project Background

With the rapid development of the lithium battery industry, electrolyte recycling has become a crucial issue. Traditional electrolyte processing methods suffer from low lithium resource recovery rates, compromised electrolyte performance, and high energy consumption. A large lithium battery manufacturer faces a technological bottleneck in electrolyte recycling and urgently needs an innovative solution that can efficiently extract lithium while maintaining electrolyte performance.

I.System Core Advantages

1.Low-Temperature High-Efficiency Evaporation Technology

Utilizing a unique low-temperature MVR design, the evaporation temperature is controlled between 45-65℃, effectively preventing electrolyte decomposition and degradation at high temperatures and ensuring the electrochemical performance of the recovered electrolyte. A specially designed falling film evaporator allows for short material residence times, minimizing the degradation of heat-sensitive components.

2.Selective Lithium-Ion Separation

Innovatively integrating an ion-selective separation module, through the organic combination of functionalized membrane separation technology and the evaporation process, achieves highly efficient selective separation of lithium ions, increasing the lithium recovery rate to over 98% while ensuring the integrity of the main electrolyte components.

3.Intelligent Concentration Control System: Equipped with an online viscosity monitoring and Raman spectroscopy analysis system, it tracks changes in electrolyte composition in real time, automatically adjusts evaporation parameters, ensuring the system operates within the optimal process window and avoiding electrolyte performance degradation due to over-concentration.

4.Inert Gas Protection System: High-purity nitrogen is used throughout the process for protection, with oxygen content controlled below 10 ppm and moisture content below 5 ppm, effectively preventing electrolyte oxidation, decomposition, and hydrolysis during evaporation.

5.Modular Design: Adopting a modular design, the process route can be flexibly adjusted according to raw material composition and processing requirements. Each functional unit is independently controlled, enabling precise processing of different types of electrolytes.

II.Technological Innovation Highlights

1.Multi-stage Fine Filtration System: Integrates multi-stage fine filtration to effectively remove solid impurities and decomposition products from the electrolyte, ensuring the purity of the recovered electrolyte.

2.Online Quality Monitoring System: Monitors the conductivity, moisture content, and metal impurity content of the recovered electrolyte in real time, ensuring stable product quality.

3.Heat Recovery Network: An innovatively designed multi-stage heat recovery system maximizes the utilization of internal heat energy, reducing energy consumption by 50% compared to traditional methods.

4.Automated Control System: Equipped with an advanced DCS system, achieving fully automated operation and automatic optimization and adjustment of key process parameters.

III.System Process Flow

1.Pre-treatment Purification: Electrolyte raw materials undergo precision filtration and adsorption treatment to remove solid impurities and metal ions.

2.Low-Temperature Concentration: Low-temperature evaporation concentration is performed under inert gas protection, with precise control of the concentration factor.

3.Lithium Component Separation: Efficient recovery of lithium components is achieved through a selective separation module.

4.Product Refining: The recovered lithium solution is deeply purified and converted into battery-grade lithium products.

5.Electrolyte Regeneration: The concentrated electrolyte is reconstituted and its performance restored before being returned to the production line for use.

IV. Project Achievements and Value Creation

1.Economic Benefits: Annual recycling of 200 tons of battery-grade lithium products and regeneration of 4,000 tons of electrolyte, generating over 100 million yuan in economic benefits annually.

2.Technological Benefits: Lithium recovery rate increased to over 98%, and regenerated electrolyte performance retention rate exceeded 95%.

3.Environmental Benefits: Achieved electrolyte resource recycling, reducing hazardous waste generation by over 5,000 tons/year.

4.Energy Consumption: System overall energy consumption reduced by 50% compared to traditional processes, significantly lowering operating costs.

V.Technological Outlook

This project successfully developed an innovative process for lithium extraction and recycling of electrolytes, providing a new technological path for the sustainable development of the lithium battery industry. This technology can also be extended to the recycling and treatment of other high-value solvents, showing broad application prospects.

Conqinphi is continuously committed to the innovative research and development of lithium battery recycling technology. For more information on electrolyte recycling solutions, please feel free to engage in in-depth communication and cooperation with the Conqinphi technical team.