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The whole castor oil mill machinery includes three workshops: castor seeds cleaning and pressing plant, castor oil solvent extraction plant, castor oil refinery plant.
At the first, we should know more about castor oil, which is considered as one of the most useful plant oils ever discovered all over the world. It has been used in food, pharmaceutical, and other industries in order to produce certain products. Aside from that, castor oil is the main source of useful oleochemicals. This type of oil can help provide comprehensive resources in connection to castor plant, castor bean, castor derivatives, and other castor-based oleochemicals.
Castor seeds and castor oil
The working process of castor oil mill machinery:
Firstly, the ripe castor seeds are set aside to dry up. Then, when they start to split open, the seeds are then gathered. The seeds are dehulled after harvesting. Dehulling can be done by hand or by the use of peeling / hulling machine. The dehulled seeds are cleaned, cooked and dried before the oil is completely extracted. The cooking is done in order to coagulate the protein, which is necessary to allow efficient extraction, and to effectively press it.
The initial stage of oil extraction is done through pre-pressing. This is normally done using a high pressure, which uses continuous screw press with the help of a seed oil press machine. The extracted castor oil is filtered. The material which is ejected from the press is called the castor cake. This contains around 8-10% of castor oil. It is also mashed into a coarse meal, and is prepared for the solvent extraction with the use of heptane in order to extract the entire oil.
Machines of castor oil mill machinery
once the oil has been taken out from the seed, it is essential to also remove the impurities found in the oil. The filtered castor oil, which is known as the crude or unrefined oil, is passed on to the castor oil refinery plant.
Quality index of crude oil:
|
Item |
Standard |
|
Smell and taste |
The original smell and taste of castor oil |
|
Moisture and volatile matter (%) ≤ |
0.20 |
|
Insoluble impurities (%) ≤ |
0.20 |
|
Acid value (mgKOH/g) ≤ |
4.0 |
|
Peroxide value (mmol/kg) ≤ |
7.5 |
Here are the steps of castor oil refinery plant:
Firstly, the oil is allowed to set before degumming it. This is done to remove phospholipids from the oil.
Next is the neutralization process. This is done to remove free fatty acids from the oil.
Then, bleaching is done in order to get rid of coloring materials, phospholipids, and oxidation products.
Lastly, the oil passes the deodorization stage. This step allows the removal of odor from the castor oil.
Then if you have any questions about the castor oil mill machinery plant or other cooking oil machine, weclome to contact us, and our engineer will give you a professional suggestions about the cooking oil making machine.
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