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Continuous soybean oil refining

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Soybean oil refining can be divided batch refining ,semi-continuous refining ,continuous refining, find here continuous soybean oil refining process for big capacity.

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 Soybean oil refining can be divided batch refining ,semi-continuous refining ,continuous refining according to different automation, continuous soybean oil refining process normally is used  for big capacity more than 50 tons per day, but capacity from 30-50 tons per day is optional : semi-continuous or continuous refining.

Continuous soybean oil refining process has features as following:

♦ Flexible and easy to adjust, Stable production even with different changes of raw material quality.
♦ Completely automatic operating system
♦ Heat recovery at maximum, Remarkable effect of energy saving
♦ All closed operation system to avoid oxidation of oil and then make sure the high quality and stability of products.


Soybean oil refining process:


1. Degumming and alkali refining

A. Crude oil is delivered to heater after filtering impurities, and then goes to mixer when reach certain temperature.
B. After mixing at high speed, crude oil will go inside hydrated reaction tank and then go to first self-cleaning centrifuge to separate soapstock.
C. Separated heavy oil goes to soapstock storage tank. Light oil goes to heater to react with alkali inside mixer. After reaction, using second self-cleaning centrifuge to separate oil and soapstock.Separated soapstock will be delivered soapstock storage by soapstock pump. Light oil will be adjusted temperature by heater and mixed with hot water to be washed in order to remove residual soap. Then using third centrifuge to separate water.
D. After heat exchanging/heating/vacuum drying, crude oil will be delivered to Decoloration.

2. Decoloration
After degumming and Deacidification, crude oil will be heated and mixed with clay and go to decoloring tower to bleach. Clay is delivered to storage bin by blower,and added to oil during production. Decolored oil will be filtered inside vane filter. Filtered unclear oil will be decolored again inside decoloring tower. Decolored clear oil will be send to next step after safe filter. Waste clay will go to storage after filter.

3. Deodorization
A. After heat exchanging ,decolored crude oil will be heated to a required temperature and delivered to deodorizing tower.
B. When deodorizing, crude oil is flowing from the top of deodorizing tower layer by layer , on every layer crude oil will be contacted with direct steam and be removed bad smells under high temperature vacuum conditions.
C. Gas will be discharged from top and be caught by fatty acid catcher. Non-condensable gases is drew off by vacuum pump. Part of caught fatty acid continues cycling to catch more impurities, other part is pumped to storage.
D. At the bottom of deodorizing tower, there is a level control system to control liquid level.
E. After oil-oil heat exchanginig, crude oil will be cooled down to safe temperature, and filtered to be edible oil.

This continuous soybean oil refining process can be used for many different oil ,such as mustards oil, rapeseed oil, nigreseed oil etc. based on this process adding dewaxing for sunflower oil refining and adding fractionation for palm oil refining. 

 

 

 

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