Method for removing oil tea seed coats

Abstract

The invention provides a method for removing oil tea seed coats with high coat removing rate and good integrity. The method comprises the following steps of: (1) raw material pretreatment: taking dry oil tea fruits, and removing oil tea fruit shells by using a shelling machine to obtain shelled oil tea seeds; (2) cold treatment: putting the shelled oil tea seeds into a fluidized monomer instant freezer, and performing fluidized instant freezing for 5 to 10 minutes at the temperature of between 30 DEG C below zero and 40 DEG C below zero to obtain cold oil tea seeds; (3) thermal treatment: quickly heating the cold oil tea seeds to the temperature of between 150 and 200 DEG C through infrared, and performing thermal treatment for 2 to 4 minutes to obtain hot oil tea seeds; and (4) coat removal: putting the hot oil tea seeds into a crusher, crushing and removing coats by using roll pair differential, and separating the coats from kernels through wind. The method has the advantages of simple process, high coat removal rate and good integrity. The coat removed oil tea seeds obtained by the method are particularly suitable for processing low-temperature squeezed tea oil, and the processed tea oil has good color and high quality and has market competitiveness.

Description

technical field [0001] The invention belongs to the technical field of oil processing, and in particular relates to a method for removing camellia seed underwear. Background technique [0002] Camellia oleifera is a woody oil plant that grows in the hilly areas of southern my country, and is one of the four largest woody oil plants in the world. According to statistics, there are more than 4.5 million hectares of camellia oleifera forests in my country, with an annual output of more than 1 million tons of camellia oleifera seeds. Camellia oleifera seed is the seed of camellia oleifera tree, including three-part structure of outer shell, inner lining (ie seed coat) and seed kernel. Although the shell is relatively hard, it can be easily removed by a sheller after drying; while the inner wall is thin and clings to the kernels, so it is difficult to separate the kernels from the underwear by conventional methods. Camellia oleifera seeds contain 25-30% oil, which is mainly con...

AI Technical Summary

Problems solved by technology

Compared with hot pressing, the content of phosphorus, acid value and peroxide value in tea oil produced by low-temperature pressing process are significantly lower, the content of functional factors is significantly higher, and the refining method is simpler. The disadvantage is that the crude oil contains underwear pigments. The composition is very dark, and the subsequent refining process cannot remove the pigment components of underwear. Therefore, the tea oil produced by low-temperature pressing is not only unsatisfactory in color, but also has a bitter taste, which is difficult to meet the requirements of the national standard.