Rapeseed treatment method before oil pressing

Abstract

The invention provides a rapeseed treatment method before oil pressing. An air screening device, a softening device, a support and the like cooperate to complete rapeseed treatment before oil pressing, and the method solves the following problems in existing rapeseed impurity removal and softening process: a. a large number of rapeseed straws and rapeseed hulls are mixed in rapeseeds and a large number of shrivelled and mildewed rapeseeds exist, the existing impurity removal process is not thorough, the rapeseeds usually still contain a large number of mixed sundries after passing an air screen on one side, and rapeseeds fall too fast during air screening, thus affecting the quality of rapeseeds subjected to air screening; and b. 1-2% of water needs to be added for soaking to promote softening of rapeseeds in the cold pressing process; however, due to a low moisture content, the surfaces of the subsequently added rapeseeds have non-uniform contact with water; the softening degrees of rapeseeds in a same soaking box are different, and the oil yield of rapeseed cold pressing is affected; and the existing long softening time of rapeseeds causes low efficiency and other problems.

Description

technical field [0001] The invention relates to the technical field of rapeseed processing, in particular to a method for treating rapeseed before oil expression. Background technique [0002] my country is a big rapeseed country, with the planting area and output ranking first in the world. The protein and fat content of rapeseed is very high, and it is one of the most important sources of vegetable oil and feed protein in our country; rapeseed can be cold-pressed and hot-pressed in oil extraction; but rapeseed needs to be cleaned before oil extraction Impurities, especially cold pressing, also need to soak and soften rapeseed to increase the oil yield of rapeseed; but the existing rapeseed mainly has the following problems in the process of removing impurities and softening: [0003] a: There are a lot of rapeseed stalks, rapeseed husks and many shriveled and mildewed rapeseeds mixed inside the rapeseed. The existing process of removing impurities is not thorough. The rap...

AI Technical Summary

Problems solved by technology

[0003] a: There are a lot of rapeseed stalks, rapeseed husks and many shriveled and mildewed rapeseeds mixed inside the rapeseed. The existing process of removing impurities is not thorough. The rapeseed usually passes through the air sieve on one side and still has a lot of mixed inside. sundries, and the rapeseed air sieve falls too fast, which affects the quality of the rapeseed after the air sieve; b: The process of cold pressing needs to add 1% to 2% water to soak the rapeseed to promote the softening of the rapeseed; but due to water The content of the rapeseed is less, resulting in uneven contact between the surface of the subsequently added rapeseed and water; resulting in different degrees of softening of the rapeseed inside the same soaking tank, which affects the oil yield of the rapeseed in cold pressing; and the softening time of the existing rapeseed is longer, lead to inefficiency

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