Factory price 30 tons mini continuous cooking seal mustard copra palm kernel cotton seed vegetable soybean oil refinery plant

What's continous oil refinery plant?

Continuous type oil refinery plant is recommended against the batch refining for higher capacity plants above 30 tons per day and for oils containing higher FFA content. This process line is bit expensive than batch process but it provides superior quality refined oil along with automation system and low processing cost.

Application of continuous oil refinery plant

Daily capacity: 30 ~ 1500 TPD
Raw materials: Crude vegetable oils, including palm oil, cotton seed oil, mustard oil and more

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Type of continuous oil refinery plant

Two types have been developed for continuous oil refinery plant of edible oils: chemical refining and physical refining.

Physical Refining:

The physical method of oil refining removes the Free Fatty Acids in single stage of deodorization process while the gum content from the crude oil is removed in the degumming process. In physical refining, comparatively more FFA is distilled out giving a high oil refining rate with minimum oil loss. For oils like palm oil there is no necessity to go for alkali refining.
Main Features and Advantages of Physical Refining

• Simple operation
• Process control is accurately monitored through instrumentation.
• Precise control of all parameters i.e. temperature, flowrate, vacuum, residence time
• Lowest Energy Cost due to most efficient heat recovery system
• The oil fully contacting with the decolorant can improve the decolorization efficiency and reduce the usage of decolorant;
• The continuous and uniform material flows will balance the decoloring time and avoid the recovery of grease oxidation and acid value.
• The continuous airtight efficient filtration equipment has realized the automation of cake discharge and reduced the labor intensity.
•  Specially designed on line oil seperator from fatty acid distillates ensures lowest neutral oil losses.

Chemical Refining:

Chemical refining is most widely used method for refining all types of crude oils. Chemical method of refining is accepted when the Free Fatty Acids is high; it removes the Free Fatty Acids and other impurities in a chemical way by Acid-Base neutralization process. Caustic soda is used as a base for this method. The addition of Caustic Soda to the acid completes the neutralization. This results in the formation of soapstock and gums which are then separated by Separators & Centrifuges. The neutralized oil is subsequently bleached and deodorized.
Main Features and Advantages of Chemical Oil Refining

• Low maintenance cost
• Process control is accurately monitored through instrumentation.
• Precise control of all parameters i.e. temperature, flowrate, vacuum, residence time
• Lowest Energy cost due to most efficient heat recovery system
• The oil fully contacting with the decolorant can improve the decolorization efficiency and reduce the usage of decolorant;
• The continuous and uniform material flows will balance the decoloring time and avoid the recovery of grease oxidation and acid value
• The continuous airtight efficient filtration equipment has realized the automation of cake discharge and reduced the labor intensity.

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Flow chart of vegetable oil refinery plant

1. Degumming and Neutralizing
degumming is to to remove gums, which affect the stability of oil and process effect of oil refining and deep processing. The method is hydration that means adding hot water(accompanied with stirring), heating, drying and cooling. Nonhydratable phosphatides can turn hydratable by adding citric acid or phosphoric acid.

Neutralizing is to remove free fatty acids(FFA), which affect the flavor and stability of oil, meanwhile increasing the soluability of gums. Degummed oil is mixed with caustic solution(NaOH)(accompanied with stirring), the reaction between NaOH and free fatty acids forms soapstocks, which settle down and get removed. Then the oil is heated, washed by hot water for 2-3 times till the waste water is clean, then dried.


2. Bleaching and Deodorization
Bleaching to remove pigments, which affect the color, quality and stability of oil, as well as food safety and the effect of deep processing. Neutralized oil is pumped into the bleaching tank, with stirring, first heated and dried, and then mixed with bleaching earth. Finally, the oil is pressed into the oil filter by air compresser to remove the bleaching earth.

Deodorizing is  to remove odor substances (mainly FFA) that are naturally present in the oil or created during processing. After deodorizing, the smoke point of oil is increased, the color, flavor, quality and stability are improved. The bleached oil is pumped into deodorzing tank, subject to steam distillation under high temperature and high vacuum, and then the oil is cooled and stored.

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Projects of soybean oil refinery plant

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Certification of GEMCO oil refinery plant

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