The countercurrent extractor is a continuous mass transfer separation device based on the difference in material distribution between liquid-liquid phases. It is mainly used to effectively extract active ingredients from natural plants (such as active substances in food and agricultural products), and is widely used in the separation of new energy materials (such as lithium battery material recovery) and environmental engineering (oily wastewater treatment).
Effective mass transfer is achieved through two-phase reverse flow, utilizing the dynamic field generated by gravity, centrifugal force, or mechanical stirring to drive continuous contact between light and heavy phases, and improving solute transfer efficiency through multi-stage series connection.
The working principle of the countercurrent extractor is based on the difference in material distribution between liquid-liquid phases, and effective mass transfer is achieved through two-phase reverse flow. Its core lies in utilizing the power field generated by gravity, centrifugal force, or mechanical stirring to drive the continuous counter current contact between the light and heavy phases in the equipment, and to improve solute transfer efficiency through multi-stage equilibrium.
Strengthen Separation
Centrifugal force field: The centrifugal extractor generates centrifugal force through high-speed rotation of the drum (200-3000G), which enhances droplet fragmentation and coalescence. The single-stage retention time is less than 30 seconds, making it suitable for separating thermosensitive substances.
Pulse field: The pulse extraction column promotes droplet mixing through periodic pressure fluctuations (frequency 1-4Hz), with a processing capacity of up to 50m ³/h, commonly used in nuclear fuel reprocessing.
Ultrasonic cavitation effect: The ultrasonic countercurrent extractor uses high-frequency vibration (1MHz-2000MHz) to generate micro air pockets, forming shock waves of thousands of atmospheres, accelerating the extraction of effective ingredients in medicinal materials, and increasing extraction efficiency by more than 40% compared to traditional methods.
environmental friendliness
Reduced solvent consumption: The countercurrent design allows for the recycling of extractants, reducing solvent consumption by 30% -50% compared to traditional batch extraction.
Closed loop recycling system: The closed solvent recovery system has a recovery rate of over 95%, reducing volatile organic compounds (VOCs) emissions.