Extraction Centrifuge

Extraction centrifuge is a new, fast, efficient liquid-liquid mixing and separation equipment, which is widely used in fine chemicals, pharmaceuticals, wet metallurgy, petrochemicals, environmental protection, plant extraction and other industries.

The working principle of extraction centrifuge mainly includes two processes of mixing mass transfer and centrifugal separation.

• Mixed mass transfer: the use of motor-driven high-speed rotation of the drum, the density of different and immiscible two liquids in the drum or paddle rotation under the action of the shear force to complete the mixed mass transfer. The aqueous and organic phases enter the centrifugal extractor and are dispersed into tiny droplets by the high-speed rotating drum or paddle, so that the two phases are in full contact, thus achieving the purpose of mass transfer.
• Centrifugal separation: under the action of centrifugal force generated by the high-speed rotation of the drum, the mixture is rapidly separated. Density of the liquid in the upward flow process gradually away from the center of the drum and leaning to the drum wall, the density of the liquid gradually away from the drum wall leaning to the center. Eventually, the two phases of liquid are thrown into the collection chamber through their respective channels, and then flow out from their respective collection chambers to complete the two-phase separation process.

• High efficiency: the extraction centrifuge can realize high efficiency phase separation in a very short time, greatly improving the production efficiency.
• Wide adaptability: it can adapt to the requirements of different extraction systems and handle various types of materials, including pharmaceutical, chemical, hydrometallurgy, food, environmental protection and other fields.
• High degree of automation: simple operation, can realize the extraction system closed operation, good operating environment.
• Small footprint: compact structure, small footprint, especially suitable for sites with limited space.
• Simple maintenance: adopts the upper suspension structure, no bottom bearing and mechanical seal, no leakage risk, no wearing parts, simple and convenient maintenance.

• Pharmaceutical industry: used for the extraction of antibiotics (such as penicillin), the active ingredients of traditional Chinese medicine (such as tea polyphenols in tea, garlic oil in garlic), the preparation of pharmaceutical intermediates.
• Chemical industry: used for the extraction and separation of various chemical substances, such as the extraction of catalysts, fine chemical products (such as spices, pigments) extraction.
• Wet metallurgy: used for extraction of rare metals, such as nickel, copper, uranium, etc.
• Food industry: for the separation and extraction of edible oil, food coloring, additives, etc.
• Environmental protection industry: used in the treatment of phenol-containing wastewater, oil-water separation, etc.

• Preparation stage: prepare the test program, prepare equipment and raw materials, ensure that the extraction centrifuge and its auxiliary equipment is in good condition, prepare sufficient raw materials and solvents.
• Pre-treatment stage: preliminary filtration of waste engine oil, heat to a certain temperature after passing into the oil-water separator insulation settlement for a period of time, the use of density differences so that the natural stratification of oil and water.
• Centrifugal extraction stage: when the extraction centrifuge reaches a stable working condition, first slowly inject the heavy-phase liquid (usually water or aqueous solution), to be the heavy-phase outlet of the liquid out of the stable, and then slowly add the light-phase liquid (i.e., after the pretreatment of the used oil or extractant), by adjusting the feed rate, centrifugal rotation speed and other parameters, to ensure that the two-phase liquid in the centrifugal force under the action of the two phases of the liquid to be able to fully contact and effective mass transfer occurs.
• Subsequent processing stage: after centrifugal extraction of the oil phase and aqueous phase products need to be further processed and purified to meet the requirements of subsequent use, but also need to properly dispose of waste to prevent pollution of the environment.

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