Cooking oil Dewaxing machine
Fractionation
1.
Fractionation Theory: The natural oil is consitute of mixed triacylglycerol mixture. Due to the difference of the triacylglycerol fatty acid carbon chain length, unsaturation, the constitute and the place of double bond and each fatty acid distribution in triacylglycerol is different, all of these make the difference in physical and chemical properties. The fractionation is based on the melting point and solubility difference, separate the oil into solid and liquid two parts under a certain temperature. Though the operation and theory of fractionation and winterization is similar, but the purpose of the two methods is different.
2.The technology: The palm oil will be heated clear and transparent and by the heat ex-changer and then send into the C1001-C1006 crystallization tank, the crystallize program will begin after starting the stirring and PU1001-PU1006 cooling water circulation pump; When the water cooling quantity in the the C1001-C1006 crystallization tank is insufficient, opening the freezing water to process crystallization; The freezing procedure design depends on the crude oil, esters and oil ratio. During the crystallization period, cooling the oil to the filtration temperature according to a predetermined cooling curve, thus to guaranteed to produce a good crystal. In crystallization process, the computer will calculate the cooling gradient automatically, the temperature of the oil and water will be measured and recorded, the water temperature will be controlled by the microprocessor program, so that can realize different stages need different water temperature, to ensure that the whole crystal growing period of the cooling curve smoothing, the crystallization can be carried out in the most suitable conditions, but not in a large number of crystal exothermic crystallization to destruction, to ensure the smoothness of the cooling curve in crystallization process. This can make the crystallization progressing under the optimum conditions and the crystals won't be damaged by the heat emission of the bulk crystallization. This ensures the stable crystals' formation which is benefit for the next step filteration and the precise cooling way ensures the maximum adaptability and day treatment batch number.
When the crystallization reaches to the C1001-C1006 crystallization tank required temperature, it will conveyed by the PU2001 pump to F2001 filter, when the F2001 forms a filteration cake layer and the refined oil is clear and has no particles appears, the F2001 refined oil will go into the V2001; when the F2001 is fully filled, the filter will enable the extrusion, baked cakes, slag and other operations, so as separate the oil and wax fully. For the the first filter in winter time, the filteration will be halfway, some particles will get through, but it will be filtered fully by the filter paper of the second filter so that make the refined oil is qualified; When the C1001-C1006 crystallization tank finished the filtration, the palmitic, stearic will melt and storage to the irrigation area.
Self-control Description:
Fractionation system self-control description:
1.0 Crystallization tank crystallization temperature measurement and automatic adjustment;
2.0 Circulating water pump outlet temperature automatic adjustment ;
3.0 Crystallization tank filling and discharge valves automatic switch;
4.0 Crystallization tank liquid level measurement and high liquid level alarm device, anti- crystal level transmitter;
6.0 Crystallization tank temperature measurement;
7.0 Crystallization tank stirring motor frequency control;
8.0 Crystallization tank crystallization curve program control;
9.0 Filter oil feed pump outlet pressure measurement and frequency control adjustment (0-3.0bar);
10.0 Filter extrusion pressure measurement and automatic adjustment;
11.0 Stearin tank liquid level measurement alarm and control the motor start and stop;
12.0 Diaphragm filter program control;
13.0 Chilled water temperature computer display;
14.0Each motor start, stop, protection, alarm on the computer.
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