Animation demonstrates the working principles and characteristics of various tower equipment—continuous liquid-liquid extraction tower

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Structure: It consists of a vertical cylinder equipped with horizontal static ring baffles. The stationary ring baffle is a flat plate with an opening in the center; it divides the cylinder into a series of extraction chambers. At the center of the extraction chamber there is a moving ring; the diameter of this moving ring is slightly smaller than the diameter of the opening in the stationary ring shield. A series of such moving rings are installed parallel to each other on the rotating shaft, which allows the moving rings and the shaft to be easily inserted into the tower. The section between the two middle flanges is the mixing zone, where the liquid-liquid mass transfer process primarily takes place. The section from the middle upper flange to the top plate constitutes the upper separation section, which is used to clarify the light liquid ； The section from the middle lower flange to the bottom flange constitutes the lower separation section, which is used to clarify the heavy liquid. Large-pore sieve plates are installed above and below the mixing section; the heavy phase enters the tower from below the sieve plates, while the light phase enters from above them. The function of the sieve plates is to reduce liquid agitation, thereby enhancing the phase separation effect in the clarifying section. Like other tower extraction devices, during operation, the light phase and the heavy phase enter the rotary disk tower from the lower and upper parts of the tower respectively. Inside the tower, the two phases come into counterflow contact; under the action of the rotating disks, the dispersed phase forms small droplets, thereby increasing the mass transfer area between the two liquids. The light phase and the heavy phase resulting from the extraction process then exit through the light liquid outlet and the heavy liquid outlet respectively. Principle of the extraction tower: The extraction process in an extraction tower takes advantage of the different solubilities of various components, including the target product, in two immiscible liquid phases. Thereby achieving the purpose of separation. It is a commonly used unit operation for separating liquid mixtures, and it is widely applied in fermentation and bioprocess manufacturing. It can not only extract and concentrate the product but also remove certain other similar substances, thereby achieving preliminary purification of the product.