Processing technology for lowering rice breaking rate

Abstract

The invention relates to the technical field of rice processing, in particular to a processing technology for lowering rice breaking rate. The processing technology for lowering the rice breaking ratecomprises the following steps of one, impurity-removing, wherein unhusked rice harvested is put into an impurity remover, and impurities are removed; two, one-time drying, wherein microwave drying equipment is adopted, the unhusked rice is dried under nitrogen condition until moisture content of the unhusked rice reaches 16-18%, and the unhusked rice is cooled to room temperature; and three, one-time rice-milling, wherein the unhusked rice cooled to the room temperature is put into a rice husking machine so that rice husks are removed, the husking rate reaches 60-80%, and a semi-finished product is obtained. The processing technology for lowering the rice breaking rate has the beneficial effects that by means of a microwave drying manner, drying is conducted through generation of heat byvibration of holistic water molecules rather than through thermal transmission from the outside to the inside; in this way, drying is uniform; the situation that surface of rice grains becomes brittlerapidly because of excessively high temperature, while excessive internal moisture is still reserved is avoided; the surface of the rice grains does not become brittle, and then the probability thatphenomenon of broken rice appears is lowered; moreover, stirring is not needed; the phenomena of broken rice caused by machinery are reduced; and germination of unhusked rice under a microwave condition is guaranteed by the nitrogen atmosphere.

Description

technical field [0001] The invention relates to the technical field of rice processing, in particular to a processing technology for reducing the broken rate of rice. Background technique [0002] Rice is one of the most commonly eaten staple foods. Rice processing in a broad sense refers to the comprehensive processing process from rice husking to polished rice products; the rice processing process basically includes impurity removal, rice milling, polishing, color sorting, grading and packaging; The rate of broken rice accounts for 15-30%. Due to the following two reasons, the rate of broken rice will increase: the first is the various treatments before rice processing, including the state of rice harvesting, threshing, drying, loading and unloading machines During transportation and other processes, the rice is crushed by mechanical impact; the second is the technical performance of rice processing machinery and equipment and operation management water products; when sol...

AI Technical Summary

Problems solved by technology

Rice processing in a broad sense refers to the comprehensive processing process from rice husking to polished rice products; the rice processing process basically includes impurity removal, rice milling, polishing, color sorting, grading and packaging; The rate of broken rice accounts for 15-30%. Due to the following two reasons, the rate of broken rice will increase: the first is the various treatments before rice processing, including the state of rice harvesting, threshing, drying, loading and unloading machines During transportation and other processes, the rice is crushed by mechanical impact; the second is the technical performance of rice processing machinery and equipment and operation management water products; when sold, the economic value of whole rice is higher than that of broken rice, so in order to obtain good Economic benefits, rice processing enterprises strive to improve the rice processing technology to minimize the broken rice rate; although the patent CN106000516A adopts the method of intermittent heating and secondary rice milling to make the broken rice rate lower than 8%, but the use of hot air and stirring The form is always a process of heating and then cooling and reheating. The outside of the rice is always heated first, and there is always a temperature gradient; the second rice milling will make the rice that has been hulled after the first milling be milled again, increasing the broken rice rate.