A method for producing virgin walnut oil by using cotton-stuffed walnuts

Abstract

The invention discloses a method for producing virgin walnut oil by using cotton-padded walnuts. The cotton-padded walnuts are removed from mildew and rotten fruit, soaked in clean water and cleaned by a spray brush roller cleaning machine; the walnut nuts are dried by gradient intermittent low-temperature hot air. ; Use a rice mill to separate the shell and kernel, and obtain kernel powder with a little walnut shell after separation; use oil cloth to wrap the walnut kernel powder and send it to the hydraulic oil press for pressing, and then enter the screw oil press for further pressing to obtain light yellow. Walnut oil; secondary filtration through a self-heating plate and frame filter to obtain high-quality walnut oil. The production equipment of the invention has low cost, high efficiency, strong applicability, and the residual oil rate of the cake is less than 5%. , arsenic, lead, aflatoxin B 1 , benzo (a) pyrene, etc. are within the scope of the national standard, suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of food processing, in particular to a method for producing virgin walnut oil by using interleaved walnuts. Background technique [0002] The type of sandwich walnut (also known as sandwich walnut or double clip walnut), mostly grafted or seeded. Its properties are between the bubble walnut type and the iron walnut type, with deep engraving, thicker shell, tight suture line, more developed inner fold wall, and some protrusions wrap the protruding part of the kernel, making it difficult to remove the kernel as a whole. The kernel yield is between 35% and 50%, and the kernel oil content is high and the quality is good. Cotton walnuts mostly appear in areas with less sunlight such as Guizhou, and some scholars also believe that this is one of the reasons for the formation of cotton walnuts. [0003] Walnut oil is rich in polyunsaturated fatty acids, and its oil unsaturation is as high as more than 90%. It is ...

AI Technical Summary

Problems solved by technology

In recent years, wild iron walnuts have been pressed in Yunnan to obtain walnut oil. However, iron walnut shells are hard, difficult to break, and the separation effect of the shell and kernel is not good. Alkali refining, decolorization and other processes for refining will greatly damage the flavor of walnut oil and the vitamins and physiologically active substances in it

[0004] Cotton walnut is different from iron walnut. The core shell is thinner than iron walnut. It is processed according to the existing iron walnut shell kernel separation technology and pressing and refining process. After the shell kernel is crushed, the mixture is serious, and the separation effect is not good. Large loss, poor oil quality

Cotton walnuts are sold at a low price alone, and the market competitiveness is poor, resulting in low enthusiasm for harvesting by the local people

Because the appearance of cotton walnuts is not much different from that of ordinary soaked walnuts, very few local people harvested cotton walnuts and mixed them with soaked walnuts for sale, which seriously affected the quality reputation of local walnuts.