Hulled rice conditioning method under vacuum state

Abstract

The invention provides a hulled rice conditioning method under a vacuum state. A hulled rice vacuum-conditioning technology is characterized in that hulled rice is subjected to comprehensive processing of dampening and infiltrating by hydrothermal functions and certain infiltrating time. On the basis that an original rice milling technology and equipment is not changed, a hulled rice vacuum-conditioning working procedure is added in the original technology before clean hulled rice subjected to grain and hulled rice separation enters a first rice husking machine between working procedures of hulling and rice husking for hulled rice conditioning. The hulled rice (of which the moisture content is 12.5%) is taken as a raw material, the hulled rice is conditioned in vacuum environment to research an influence rule to a head rice rate by vacuum conditioning time, a vacuum degree and humidification capacity in different vacuum conditioning control parameters, and test conditions are further optimized by response surface analysis on the basis of a single factor test. A result shows that optimal vacuum conditioning parameters are as follows: the vacuum conditioning time is 30min, the vacuum degree is 40kPa, the humidification capacity is 1.6%, and at the time, the head rice rate is about 72.54%.

Description

technical field [0001] The invention relates to the field of agricultural product processing, in particular to a method for tempering brown rice in a vacuum state, which is applied to the refining and processing of brown rice. Background technique [0002] my country is the largest rice producing country in the world. For a long time, rice processing is mainly based on mechanical rice milling, which is carried out under relatively high pressure friction, so that the cortex of brown rice is milled to achieve the purpose of peeling. Long-term storage of rice reduces moisture, and the moisture content after storage is generally around 12% to 13%, while the optimum moisture content of brown rice is around 15% to 16%. Low-moisture brown rice has high hardness and brittleness, and is prone to cracks and broken rice during the rice milling process, so the broken rice rate increases and the rice production rate decreases, and the surface finish of the rice is low, and the precision ...

AI Technical Summary

Problems solved by technology

Low-moisture brown rice has high hardness and brittleness, and is prone to cracks and broken rice during the rice milling process, so the broken rice rate increases and the rice production rate decreases, and the surface finish of the rice is low, and the precision of the finished product is uneven. Increased energy consumption for rice milling

In actual production, the traditional treatment method is to use atmospheric pressure humidification and tempering to make the moisture of brown rice meet the requirements for grinding. The rate of polished rice is usually about 40%, but this method requires certain humidification and tempering equipment and strict technology. If the process is not properly selected, it will reduce the quality of brown rice and affect its processing and eating quality

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