A Method for Quickly Preparing Crude Fat from Brewed Sauce Dregs

Abstract

The invention discloses a method for fast making crude fat from brewed soya residues. The method includes the following steps that firstly, the soya residues are contained in a squeezer to be squeezed; secondly, the soya residues are contained in a fluidized bed and subjected to fluidized drying, and dry soya residues are obtained; thirdly, the dry soya residues are contained in an extraction kettle, subcritical extraction is performed by introducing extraction solvents, pressure reduction evaporation is performed after extraction ends, soya residue crude fat is obtained, rice dreg solvents are removed through pressure reduction vaporization, and the vaporized extraction solvents return to a solvent storage tank to be cyclically used after being compressed, condensed and liquefied. The method has the advantages that drying time is short, extraction efficiency is high, the crude fat is hardly oxidized, the rice dreg crude fat residual is lower than 2%, the extraction solvents are removed from crude fat and rice dregs and can be easily recycled, and no solvents are residual. The technology is simple, the number of operating steps is small, cost is low, handling capacity in unit of time and unit equipment volume is large, and the method is suitable for large-batch treatment. The obtained crude fat is good in quality and can be used after being slightly refined.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of brewing sauce residues, and in particular relates to a method for rapidly preparing crude fat from brewing sauce residues. Background technique [0002] Sauce residue, also known as soy sauce residue, is the main by-product of soy sauce fermentation production, and the annual output is huge. The dry basis content of crude fat in the sauce dregs made from soybeans reaches 25%-36%, which is a resource worthy of development and utilization. However, the water content in fresh sauce dregs is as high as 75% to 80%, and it contains a lot of salt, which makes it impossible to use directly, and it is also extremely difficult to handle. [0003] Previously, it was reported that sauce residue and other organic wastes were mixed and fermented for the production of organic fertilizers. However, due to the high salt content of soy sauce residue, if it is directly used as fertilizer, it will cause ...

AI Technical Summary

Problems solved by technology

Long vacuum drying time, high energy consumption, high requirements on equipment, difficult to continuous production

The organic solvent method often uses petroleum ether, ethanol, acetone, etc. as solvents to extract fat. The extraction time is long, the efficiency is low, the solvent consumption is large, the solvent recovery process is complicated, the cost is high, and the solvent is difficult to recover completely. solvent residue