Method for ordinary pressure continuous extraction of grease from schizochytrium limacinum cake and equipment thereof

Abstract

A method for ordinary pressure continuous extraction of grease from schizochytrium limacinum cake and equipment thereof are disclosed. The invention discloses a method for extracting residual grease from schizochytrium limacinum cake at ordinary pressure by using n-hexane. The method is characterized in that pelletized or puffed schizochytrium limacinum dry mycelium or oil-pressed cake which is used as a raw material undergoes continuous extraction in an n-hexane solvent by reflux and full immersion modes under ordinary pressure by the utilization of a specially-designed immersion-type extractor so as to obtain grease in the schizochytrium limacinum cake. The specially-designed immersion-type extractor is a shallow-bed type. An embedded scraper and a continuous-type tray are arranged inside the extractor. The solvent moves in the reverse direction of the feed scraper. During the whole extraction process, it can be guaranteed that the raw material is completely immersed in the solvent until extraction and slag emission are completed. By the design and the extraction technology, continuous production can be realized, extraction efficiency is improved, and extraction cost is reduced. The equipment of the invention is more excellent than existing subcritical and supercritical extraction technological equipment.

Description

technical field [0001] This patent relates to a submerged extraction technology of Schizochytrium cake and the design of the extraction equipment, which is mainly an industrial method for extracting oil from Schizochytrium cake by using a solvent under normal pressure. Background technique [0002] Microbial fats are the third emerging source of edible fats besides animal fats and vegetable fats. In particular, some n3 functional polyunsaturated fatty acids that are not found in animal and vegetable fats can be obtained from microbial fats, such as DHA and ARA. Polyunsaturated fatty acids play an important role in the visual and intellectual development of infants and young children. Therefore, the technology of obtaining functional polyunsaturated fatty acids from microorganisms has important industrial and market value. Various microorganisms, including Schizochytrium, have been successfully applied and industrialized, and achieved good economic benefits. [0003] At pres...

AI Technical Summary

Problems solved by technology

However, the design principle of the existing atmospheric pressure extraction device makes the production capacity too large for microbial oil. The mainstream high-cost continuous vegetable oil extraction device is rarely less than 1000TPD (tons/

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