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The RDC series of rotary extractor towers have attracted widespread attention in the industry

2016-05-24View Original

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The RDC series of rotary disk extraction towers have attracted widespread attention in the industry. Rotary disk extraction towers belong to the category of mechanically stirred extraction towers; during liquid-liquid extraction operations, the two liquids flow counter-currently within the tower. One of the liquid phases acts as the dispersed phase and passes through the other continuous phase in the form of droplets. The concentrations of the two liquid phases change continuously in a differential manner within the equipment, and separation between the two phases is achieved at both ends of the tower due to the difference in density. When the light phase acts as the dispersed phase, the phase interface appears at the top of the tower ; Conversely, when the heavy phase acts as the dispersed phase, the phase interface appears at the bottom of the column. Product structure diagram: Structure and working principle of the rotating tower: It consists of three parts: the upper clarification section, the mixing section, and the lower clarification section. The mixing section is cylindrical in shape, and its interior is divided into a series of extraction chambers by stationary ring baffles. Between the two stationary ring baffles lies a fixed rotating disk that rotates together with the stirring shaft. During operation, after the variable-speed motor is started, the heavy phase (aqueous phase) and the light phase (organic phase) enter from the top and bottom of the tower respectively, where they come into contact in counter-current within the tower. Under the agitation of the fixed rotor, the dispersed phase forms small droplets, thereby increasing the mass transfer area. After the extraction process is complete, the light phase and the heavy phase flow out through the outlets at the top and bottom of the tower, respectively. Features Overview: 1. Attractive appearance, simple structure, easy to operate, high operational flexibility, and large throughput ; 2. High processing capacity, suitable for continuous production ; 3. High efficiency at level 3, with low solvent retention ; 4. Fast mass transfer rate, resistant to emulsification ; 5. Wide range of applicable materials ; 6. Small footprint and low maintenance costs ; Compared to mixed clarifiers, the extraction tower has the following advantages: 1. Lower operating costs ; 2. The factory layout is simple; a single simple multi-stage tower can replace several mixed clarifiers ; 3. Eliminate a large number of pumps, pipes, mixers, tanks, and control equipment ; 4. The amount of solvent required is reduced by about 50% ; 5. A sealed system allows the equipment to operate at higher temperatures, reducing solvent evaporation and oxidation ; 6. An improvement in extraction efficiency and selectivity helps to reduce the extraction time ; Application areas: 1. Hydrometallurgy (separation of heavy metals and rare earth metals); 2. Nuclear industry (extraction of uranium); 3. Bioengineering (extraction of nutrients, interferons, and organic acids from fermentation broths); 4. Food industry (extraction of edible oils, food colors, additives, etc.); 5. Environmental protection industry (dephenolization of wastewater); 6. Industrial production (extraction of furfural, propane deasphalting, separation of nickel and cobalt, etc.). Technical parameters: Model, Inner diameter of tower in mm, Mixing flow rate in L/h, Tower height in mm, Power in kW: RDC-60: 60, 0–1.5, 500, 0.06; RDC-100: 100, 1.5–7, 700, 0.18; RDC-300: 300, 7–200, 2000, 0.37; RDC-500: 500, 200–800, 3000, 1.1; RDC-800: 800, 800–2000, 4000, 4; RDC-1500: 1500, 2000–10000, 7500, 11. Note: Common materials include transparent acrylic, PP, rigid PVC, and fiberglass reinforced with steel. The above data represent the standard parameters; specific designs are required based on the customer’s requirements in actual applications.

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