Chinese chestnut or castanea henryi unshelling method

Abstract

The invention belongs to the technical field of nut processing and relates to a Chinese chestnut or castanea henryi unshelling method. The method comprises the following steps of opening cutting, shell blasting, drying, cooling, quick freezing and unshelling. The laser opening cutting technology is adopted, the problem of a plurality of cut marks remained on chestnut kernels caused by the traditional cutter cutting is solved, and meanwhile, the problem of non-enzymatic browning caused by metal cutter cutting is also avoided. The quick freezing treatment method is adopted, so the chestnuts are unshelled under the frozen state, on one hand, the intensity of the chestnut kernels is improved, the problem of low perfect kernel rate caused by kneading and extrusion in the chestnut unshelling process is avoided, and on the other hand, the deterioration problem caused by high temperature in the unshelling process is reduced. Air jet flow impact shell blasting and enzyme inactivation technology is adopted, on one hand, the flesh and inner layer red skin separation of the chestnuts is completed after the laser opening cutting, on the other hand, the polyphenol oxidase is inactivated through high-temperature short-time treatment, and the color degradation problem caused by enzymatic browning is overcome.

Description

technical field [0001] The invention belongs to the technical field of dried fruit processing, in particular to a method for shelling chestnuts or chestnuts. Background technique [0002] Chestnut is rich in nutrition and high in economic value, and is known as the "king of dried fruits". Chestnut tree has good stress resistance, cold resistance, drought resistance, barren resistance, and strong adaptability. It is an ideal tree species for returning farmland to forest, greening barren hills, and water and soil conservation. Chestnut is widely distributed in my country, from Jilin in the north, to Guangdong and Hainan in the south; to Gansu in the west, to Taiwan and coastal provinces in the east, across the temperate and subtropical zones, with the most concentrated cultivation and the largest output in the provinces of North China in the Yellow River Basin and the Yangtze River Basin . In 2010, my country's chestnut output was 1.62 million tons, accounting for more than 8...

AI Technical Summary

Problems solved by technology

The chestnut shelling method based on the cutting of the rotary knife roller will have the following problems to varying degrees: (1) The high-speed rotating cutting tool often cuts into the pulp, causing several scratches on the chestnut kernel, which reduces the commodity value of the chestnut kernel

(2) In the process of chestnut shelling, due to the low strength of chestnut kernels, a large amount of damage will occur during the process of extrusion and kneading, resulting in a decrease in the whole kernel rate

(3) Chestnut kernel browning is serious during the chestnut shelling process

At present, the shelling method using metal knives will inevitably contact the chestnut kernel pulp, causing non-enzymatic browning