Physical method for preparing vegetable oil

Abstract

The invention relates to a physical method for preparing vegetable oil. The method comprises the following process steps of: cleaning, remote infrared vacuum pre-tempering, microwave puffing, tempering, pressing, puffing, high-pressure fluid extraction, fixed bed adsorption refining, continuous vacuum dehydration and finally micro-filtering. The remote infrared vacuum pre-tempering and microwave puffing pre-processing method is fast and high-efficient and is suitable for industrial production. Press cake puffing and high-pressure fluid extraction are combined so that the problem of oil extraction of cold-pressing cakes is effectively solved, and meanwhile residual oil of the cold-pressing cakes is effectively reduced. The fixed bed adsorption refining method is simply and conveniently operated and has the advantages of short cycle, low energy consumption, low oil refining loss, high grease quality and the like. The whole process has the advantages of simplicity and convenience in operation, no solvent residue, low energy consumption, small neutral oil loss, high product quality and the like, an environment-friendly effect is achieved, and the method can be widely suitable for different kinds of oil.

Description

technical field [0001] The invention relates to a method for preparing oil, in particular to a method for preparing vegetable oil using a whole process and physical means, and belongs to the technical field of oil processing. Background technique [0002] The current vegetable oil extraction methods mainly include one-time pressing, pre-pressing-extraction, puffing to oil, low-temperature pressing, and aqueous enzymatic method. The one-time pressing method is a one-time deep pressing using a press machine. The single-screw press machine is a typical equipment used in the one-time pressing method in my country. The general pressing temperature is as high as 125 ° C ~ 130 ° C, and the quality of the crude oil and cake obtained is poor. . The pre-pressing-leaching oil production method uses a press to first squeeze out more than 60% of the crude oil, and then extracts the pressed cake with an organic solvent. The residual oil of the meal after extraction is generally about 1%; ...

AI Technical Summary

Problems solved by technology

However, this process is only suitable for the processing of camellia oleifera seeds, and the water washing and separation methods have a long period of time, and the refining consumption is high, resulting in waste water and oil residues. At the same time, the deodorization time is as long as 3 to 6 hours, and the subsequent drying time is 1 to 6 hours. 2h, high energy consumption; no deacidification and decolorization process involved

[0005] CN 102268325A discloses a method for extracting grape seed oil by cold pressing. Infrared heating is used to dry wine pomace, and then the grape seeds are separated, and then the grape seeds are squeezed by hydraulic cold pressing, and the finished grape seed oil is obtained after filtration; the method is easy to operate , low energy consumption, but high residual oil and does not involve the refining of grapeseed oil

[0006] CN 102002427A discloses a method for preparing peanut germ oil, which uses low-temperature tempered raw material embryos, undergoes two low-temperature pure physical cold-pressing peanut germs, and then uses a physical refining method that combines low-temperature drying and dehydration with multi-layer plant fiber filtration. Peanut germ oil; this method can retain the physiologically active substances in the oil to the greatest extent, but does not involve degumming, deacidification and decolorization processes

[0007] CN 101597542A discloses a process method for preparing rubber seed oil by microwave treatment and extrusion puffing synthesis method, in which fresh rubber seeds are subjected to microwave drying and sterilizing and enzymatic treatment, and then shelling, shell kernel separation, seed kernel peeling, seed kernel After crushing, the seeds are sent to an extrusion extruder for pressing, and after a part of crude oil is obtained, the extruded material is sent to a screw oil press for secondary oil extraction; this method can better solve the problem of traditional rubber seed hair Oil extraction process, but not related to the refining method of fats and oils

[0008] Judging from the above oil production methods, these processes may have problems such as insufficient pretreatment, high residual oil after pressing, or high refining energy consumption, high refining consumption, and long cycle.

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