General procedures of oil refining-Main sections of oil refining
The oil refining process usually refers to the sum of the production process consisting of the refining methods, process flow, process parameters, equipment and operating procedures used from crude oil to refined oil.
From the production level, oil refining is not to remove all impurities, but to remove harmful and unwanted impurities according to the use and quality requirements of the refined oil, Thereby improving the edible safety, storage stability and the need to ensure the use of oil.
From the perspective of the refining process or procedure, oil refining is to compare the quality of crude oil and refined oil to remove unwanted impurities and toxic and harmful substances.
According to a certain refining procedure, the methods and equipment used in each process are reasonably combined to form a specific oil refining process. Therefore, when determining or selecting the oil refining process, first determine the purpose of oil refining, then formulate refining procedures, select refining methods and measures, and finally combine methods, equipment, process parameters, etc.
Main sections of oil refining
The production process from crude oil to refined oil is inseparable from a reasonable refining process. A reasonable refining process must first have a reasonable refining process purpose and refining procedure. Generally speaking, the operation process of a representative refining process is a section (or process) in the process.
Through the comparison between various raw oils and refined oils, it can be seen that the representative impurities that need to be removed in oil refining are colloidal impurities, free fatty acids, pigments, odor components, waxes, moisture, and toxic and harmful substances. The removal process of the first five types of impurities is usually regarded as a relatively independent refining section, correspondingly called degumming, deacidification, bleaching, deodorization and dewaxing.
For toxic and hazardous substances, because they are gradually removed in the aforementioned sections, they are usually not used as a separate section, but if low-grade edible oil is produced, the detoxification can be used as an independent section;The removal of water is used as one of the necessary links in each main section, and it is not a separate section.
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