Production method and system of deacidification rice bran oil

Abstract

The invention relates to a production method and a system of deacidification rice bran oil. The production method comprises the following steps of: feeding rice bran oil into a heat exchanger, warming, and filtering through a frame filter; feeding the filtered rice bran oil into a cylinder centrifugal extractor, extracting, and separating the rice bran oil from fatty acid to obtain the deacidification rice bran oil and mixed liquor of the fatty acid and ethanol; and feeding the mixed liquor of the fatty acid and the ethanol into an evaporator, separating, feeding ethanol steam into a condenser, condensing the ethanol steam to be liquid, and recycling the ethanol steam as an extracting agent. The system comprises a crude oil storage tank, a pump I, the heat exchanger, the frame filter, a filtered oil storage tank, a pump II, the cylinder centrifugal extractor, a deacidification oil storage tank, a fatty acid and ethanol mixing liquor storage tank, a pump III, the evaporator, a free fatty acid storage tank, the condenser and an ethanol recovery tank. The whole production process is non-toxic and environmental-friendly, the extracting agent ethanol can be recovered and recycled, the production cost is low, the operation process is continuous, the equipment is simple to operate, the operation cost is low, and scale production can be realized.

Description

technical field [0001] The invention belongs to the field of vegetable oil refining, in particular to a production method and system of deacidified rice bran oil. Background technique [0002] Rice bran oil is an oil made from rice bran, a by-product of rice processing. The annual output of rice in my country is 200 million tons, and the by-product of rice bran processing is 20 million tons, which can produce 3 million tons of rice bran oil. It is widely used in food, medicine, chemical industry, food additives, etc. field. Edible rice bran oil mainly contains oleic acid and linoleic acid, and also contains oryzanol, glutaric acid and vitamin E, which can lower cholesterol, prevent cardiovascular diseases, and treat nervous system diseases. It is a nutritional and health-care edible oil. [0003] During rice processing, the rice bran leaves the parent rice and contacts with oxygen. Under the action of lipolytic enzyme, the free fatty acid content of rice bran crude oil incre...

AI Technical Summary

Problems solved by technology

Alkali refining and deacidification method is suitable for rice bran oil with low free fatty acid content. Rice bran oil with high free fatty acid content needs multiple alkali refining, consumes a lot of lye, increases cost, and produces a lot of waste water; the product refining rate is low, oryzanol Large loss, deep color

The distillation deacidification method has strict requirements on the pre-treatment of oils. Rice bran oil with high free fatty acid content needs repeated high-temperature and high-pressure distillation, which consumes a lot of heat and electricity, and the production cost is high. Vitamin E is lost into free fatty acids; Produce harmful body substances, trans fatty acids and chloropropanols, inhibit growth and development after consumption

Esterification and deacidification method is to use enzyme catalyst to esterify and add glycerin to reduce oil, but this method has high esterification temperature. After adding catalyst, it will produce monoglyceride and diglyceride, and the oil will be denatured, so it is not suitable for consumption. oil, and cannot be produced on a large scale at the same time, and the use of enzymes is expensive, the production cost is high, and it is not suitable for industrial production

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