Technology for deodorizing vegetable oil with high content of unsaturated acid

Abstract

The invention relates to technology for deodorizing vegetable oil with high content of unsaturated acid, belonging to the technical field of vegetable oil refining. In the technology, two vacuum heatexchangers with the same structure are employed for heat exchanging and heating; a tray deodorization tower and a packing deodorization tower are employed to form double towers for deodorization in sequence. The obvious characteristics of adopting the vacuum heat exchangers for heat exchanging and heating are as follows: the energy is saved and the oil is slowly heated under high vacuum. By adopting the double towers for deodorization in sequence, such indexes as acid value, smoke point, color and the like of the vegetable oil with high content of unsaturated acid can be effectively improved,thus strongly ensuring that the final oil products satisfy the high standard requirements of the clients. The technology is suitable for processing the vegetable oil which has high content of unsaturated acid and is easily decomposed at high temperature, such as corn oil, and features good deodorization effect, simple operation and high comprehensive benefits.

Description

technical field [0001] The invention relates to a vegetable oil deodorization process with high unsaturated acid content, belonging to the technical field of food oil refining. Background technique [0002] Vegetable oil needs to go through the deodorization process in the refining process. During the deodorization process, the heat exchange equipment used in the oil heating and heat exchange process is mostly a spiral plate heat exchanger or a tube-and-tube heat exchanger. In this type of heat exchange equipment, oil Rising to the temperature required for deodorization in a short period of time, severe temperature changes will cause some neutral oils to undergo thermal polymerization, isomerization and other reactions, which will deteriorate the quality of the oil; at the same time, because the heating and heat exchange process is in a closed In the oil circuit, the residual air and moisture in the oil will accelerate the oxidation, hydrolysis and other deterioration reacti...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a vegetable oil deodorization process with high unsaturated acid content, so as to solve the problem of unsatisfactory deodorization effect of the existing vegetable oil with high unsaturated acid content such as corn oil, high acid value and smoke in the finished oil. Insufficiency of low point, through the present invention, the acid value, smoke point, color and other indicators of the refined oil can be effectively improved, thereby helping to improve product quality and economic benefits

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