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Continuous Phisical Refining Plant

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The OIltek Split Column Continuous Physical Refining Plant has been carefully designed to increase your refined oil quality while reducing your operating costs.
If you want to be the industry leader in premium quality, packed edible oil products, or wherever refined oil quality and energy costs are important, your choice of our split column design will ensure your manufacturing investment supports your goals.
OILTEK SPLIT COLUMN CONTINUOUS PHYSICAL REFINING PROCESS
Freshly extracted crude oils contain a diverse group of undersirable impurities such as :
Naturally-occuring compounds, including pigments and phosphatides
Contaminants from the extraction process, such as metals
Furthermore, the phosphatides and metals are commonly present as gums, which are not easily handled.
By the time you receive the oil, it will contain more, objectionable degradation products, including:
Peroxides, aldehydes, ketones, fatty acids and fixed pigments.
Our technical objective is to remove all these impurities - whilst preserving the oil's natural, positive attributes - to produce a pure, bland, bright and lightly coloured refined oil of exceptional resistance to deterioration during storage and use.
Our Split Column Physical Refining Plant efficiently executes an integrated sequence of three specialised processes that are thorough, yet gentle.
Dry Degumming
Incoming crude oil from storage is continually heated to degumming temperature by outgoing refined oil, or by preheater during start-up. Food grade acid is constantly dosed and mixed with the oil.
The oil-acid mixture flows to a degumming vessel for the degumming reaction to proceed. Gums in the oil decompose on contact with the acid to liberate metals and phosphatides, which are removed during adsorption bleaching.
Adsorption Bleaching
Degummed oil continues to a slurry tank under vacuum. Bleaching earth is concurrently metered to the slurry tank and a slurry of degummed oil and earth forms.
This slurry continues to flow through a two-stage bleacher vessel. In the first stage, the slurry is heated to bleaching temperature. In the second stage, the bleaching reaction proceeds and impurities, especially metals, phosphatides, pigments and peroxides, are trapped on the earth or decompose.
The slurry is continually discharge from the bleacher through the bleaching and polishing filters, which separate the earth from the oil and ensure complete removal of all solid impurities.
Deodorisation
Bleached oil is further de-aerated. Next, it is heated to deodorising temperature in two steps by the outgoing refined oil, or start-up heater, and then by a high-pressure steam generator. The oil then flows under high vacuum through a sequence of three vessels to complete the removal of impurities:
In the flash vessel, around 1/3 of fatty acids evaporate from the oil
In the pre-stripper, which features structured internal packing, aldehydes, ketones and the bulk of fatty acids are carried from the oil by stripping steam
In the deodoriser, removal of aldehydes, ketones and fatty acids is complete and remaining carotenoid pigments decompose
The outgoing refined oil is cooled in three steps by bleached oil, incoming crude oil and cooling water. Antioxidant may be dosed and the refined oil is sent to storage.

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