DESCRIPTION
The set-up is designed to demonstrate and stimulate the phenomena of crystallization. Swenson Walker crystallizer is a continuous type crystallizer. This operation involves both heat and mass transfer. Crystallization is the formation of solid particles within a homogeneous phase. Its wide use has a two-fold basis; a crystal formed from an impure solution is itself pure.
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The Swenson-Walker crystallizer. Oae of the commonest types of continuous crystallizers (with cooling only) used in the United States is the Swenson-Walker crystallizer, shown in Fig. It consists of an open trough A, 24 in. Wide, with a semicylindrical bottom, a water. It is convenient in small scale or batch operations because of their low capital costs, simplicity of operation and flexibility Swenson Walker Crystallizer A continuous crystallizer consist of an open round bottomed-trough, 24-in wide by 10 ft long, and containing a long ribbon mixer that turns at about 7 rpm. Swenson-Walker crystalliser to form crystals of Na 3PO 4.12H 2O. The solubility of Na 3PO 4 at 298 K is 15.5 kg/100 kg water, and the required product rate of crystals is 0.063 kg/s. The mean heat capacity of the solution is 3.2 kJ/kg deg K and the heat of crystallisation is 146.5 kJ/kg.
The setup consists of a top open jacketed round bottom trough. A ribbon mixer is provided in crystallizer trough, which rotates at low rpm for agitation of saturated solution. The saturated solution is prepared in a tank fitted with heater and a stirrer. This hot saturated solution is fed at one end of the crystallizer and flows slowly towards the other end while being cooled and is allowed to flow back in hot feed tank making the process continuous. The crystals sediments at the bottom of the trough, and can be washed out at the end of process. Arrangement for Cooling water circulation and flow measurement in jacket is made by using storage type water tank, a pump and a rotameter. Necessary instrumentation is done for temp measurement.
Swenson Walker Crystallizer Pdf Instructions
Swenson-Walker crystalliser to form crystals of Na 3PO 4.12H 2O. The solubility of Na 3PO 4 at 298 K is 15.5 kg/100 kg water, and the required product rate of crystals is 0.063 kg/s. The mean heat capacity of the solution is 3.2 kJ/kg deg K and the heat of crystallisation is 146.5 kJ/kg. The Swenson draft tube baffle (DTB) crystallizer is the most successful of the crystallizers designed to make the large, uniform crystals required for fertilizer and similar applications where superior filtration, centrifugation, washing, drying, and storage characteristics are required. This design is the result of years of research.