Driven by the global “dual carbon” goals and increasingly stringent environmental regulations, industries such as chemicals, hydrometallurgy, and pharmaceutical intermediates are undergoing a profound green and low-carbon transformation. As a core separation unit operation, liquid-liquid extraction plays a decisive role in determining product purity, production cost, energy consumption, and environmental compliance through equipment selection.

Faced with the inherent limitations of traditional gravity-driven extraction equipment—such as mixer-settlers and extraction columns—which rely solely on density differences, industries are challenged by low efficiency, high energy consumption, large footprint, and severe solvent entrainment. How to achieve cost reduction, efficiency improvement, and greener production through equipment upgrading has become a key focus in process optimization.

As a national high-tech enterprise specializing in liquid-liquid extraction technology and equipment manufacturing, Zhengzhou Tiei Extraction Technology Co., Ltd. provides high-efficiency, energy-saving, compact, and fully enclosed separation solutions through its independently developed CWL-M series centrifugal extractor. By generating a strong centrifugal force field through high-speed rotation, this series intensifies two phase mixing and phase separation. It has been successfully applied in numerous large-scale chemical and hydrometallurgical projects, significantly improving single-stage extraction efficiency while substantially reducing overall operating costs.

Pain Points of Traditional Gravity Extraction Processes: Dual Pressure from Efficiency and Environmental Compliance

In widely used traditional extraction systems, the mixing and separation of two phases rely entirely on gravity differences and natural settling, leading to fundamental limitations that constrain process performance:

1.Low mass transfer efficiency: Insufficient phase contact results in single-stage extraction efficiencies typically below 60%, requiring multiple stages in series to meet process requirements, leading to long process flows.
2.Outdated operating modes: Batch or semi-batch operation results in poor inter-batch reproducibility and noticeable product quality fluctuations.
3.High energy and material consumption: Energy consumption per unit throughput is relatively high, while significant solvent entrainment losses increase downstream recovery load and material costs.
4.Large equipment footprint: Extensive land occupation limits compact plant layout and flexible capacity expansion.

These limitations make traditional technologies increasingly unable to meet modern industrial requirements for continuous operation, large-scale production, and green low-carbon performance. With tightening carbon footprint accounting and cleaner production audits, energy-saving, consumption-reduction, and closed-system upgrades in extraction processes have become urgent priorities.

CWL-M Series Centrifugal Extractor: A Technological Innovation Driven by Centrifugal Force Field

The CWL-M series centrifugal extractor is an independently developed product by Tiei Extraction, designed to address the pain points of traditional extraction equipment. Its core innovation lies in utilizing a high-speed rotating drum to generate a centrifugal force hundreds of times greater than gravity, integrating two phase mixing and centrifugal separation into a single compact, fully sealed unit, enabling mass transfer and phase separation within seconds.

The operating process of the CWL-M centrifugal extractor can be divided into three stages, enabling efficient counter-current contact between the extractant and the feed solution:

1.Feed Introduction and Intensive Mixing
The heavy phase (e.g., aqueous feed solution) and light phase (e.g., organic extractant) enter the mixing zone separately through the bottom inlets according to a preset phase ratio. Under the strong vortex and shear forces generated by the high-speed rotating drum, two phases are rapidly dispersed into fine droplets, significantly increasing interfacial contact area. As a result, mass transfer efficiency is far superior to natural diffusion under gravity conditions.

2.Centrifugal Extraction and Rapid Mass Transfer
Within the strong centrifugal force field, the target solute is rapidly transferred from the feed phase to the extractant phase. The mass transfer coefficient is significantly higher than that of traditional equipment. Since the mixing and transfer process takes only a few seconds, issues such as emulsion formation or undesired side reactions caused by prolonged contact are effectively avoided. This makes the equipment particularly suitable for systems prone to emulsification or containing solid particles.

3.Efficient Phase Separation under Centrifugal Force
The mixed liquid after mass transfer enters the separation zone inside the drum. Under strong centrifugal force, the two phases are quickly stratified according to density differences, forming a clear interface. The heavy phase moves toward the outer edge of the drum and is discharged through the heavy-phase weir, while the light phase collects toward the center and is discharged through the light-phase weir. Without internal obstructions, rapid clarification is achieved, resulting in excellent separation performance and extremely low solvent entrainment.

Core Advantages: Why Does CWL-M Centrifugal Extractor Double Efficiency?

1.Dramatic Improvement in Extraction Efficiency
Thanks to the strong centrifugal field generated by high-speed rotation, the interfacial mass transfer coefficient is increased by orders of magnitude. Single-stage extraction efficiency can stably exceed 95%, far higher than the approximately 60% achieved by traditional mixer-settlers. For multi-stage counter-current processes, the number of theoretical stages can be significantly reduced, simplifying the overall process flow.

2.Continuous Operation and Automation Compatibility
The system supports fully continuous feed and discharge, with flexible capacity adjustment. Integrated with PLC/DCS control systems, it enables fully automated operation and ensures high consistency between batches, fundamentally eliminating product quality fluctuations.

3.Significant Reduction in Energy Consumption
By intensifying mixing and separation through centrifugal force, energy utilization efficiency is greatly improved. Operational data shows that energy consumption per unit throughput is reduced by approximately 30%–50% compared with conventional annular centrifugal extractors and mixer-settlers, directly supporting corporate carbon reduction targets.

4.Compact Design and High ROI
The CWL-M series centrifugal extractor features a highly integrated structure, reducing footprint by more than 60% compared with mixer-settler systems of equivalent capacity. This significantly lowers plant construction costs. In addition, the equipment allows for rapid installation and maintenance, resulting in lower maintenance costs.

5.Fully Enclosed Operation for Safety and Environmental Compliance
The fully sealed design effectively prevents volatilization and leakage of organic solvents (such as sulfonated kerosene, MIBK, chloroform, etc.), significantly improving workplace conditions. It ensures compliance with VOC emission standards, meets stringent environmental regulations, and protects operator health and safety.

6.Wide Material Adaptability
For complex systems such as emulsifiable mixtures or phases with small density differences, the CWL-M centrifugal extractor maintains stable operational flexibility through adjustable rotational speed and optimized weir plate design. It is widely applied in fields such as lithium battery recycling, agrochemical and pharmaceutical intermediate synthesis, and petrochemical oil-water separation.

Green and low-carbon transformation is not only a regulatory requirement but also a strategic pathway for enhancing core competitiveness. With its superior centrifugal-force-enhanced mass transfer and separation performance, the CWL-M series centrifugal extractor is redefining the benchmark of liquid-liquid extraction technology. It represents not just an equipment upgrade, but a fundamental transformation in mass transfer efficiency and production methodology.

Zhengzhou Tiei Extraction is committed to becoming a leader in liquid-liquid extraction and separation technology innovation. We provide end-to-end services including process design, equipment selection and manufacturing, installation and commissioning, as well as after-sales maintenance.

If you are facing challenges such as low extraction efficiency, high energy consumption, or environmental compliance pressure, feel free to contact the Tiei technical team for a customized optimization solution.
Email: sales@tieiextraction.com
Whatsapp: +86 19069612820