Method for improving head rice yield of high-quality late indica rice by using radio frequency heating technology

Abstract

The invention relates to a method for improving the head rice yield of high-quality late indica rice by using a radio frequency heating technology. The method comprises the following steps: (1) high-frequency radio-frequency heating, tempering, low-frequency radio-frequency heating, tempering, and natural cooling. The method of the invention dries high-moisture high-quality late indica rice into arelatively-high-moisture high-quality late indica rice with a moisture content of 16.0-18.0% by the high-frequency radio-frequency heating and the tempering, and then dries relatively-high-moisture high-quality late indica rice into a high-quality late indica rice product with a moisture content of 13.0-13.5% by the low-frequency radio-frequency heating and the tempering. Compared with traditional drying methods, the method of the invention has simple operation and low energy consumption, the head rice yield of the high-quality late indica rice product is as high as 57.0-62.1%, the taste quality is 90-93, and the product is in line with the national primary quality standard of high-quality rice.

Description

technical field [0001] The invention belongs to the field of grain drying, and in particular relates to a method for improving the whole rice rate of high-quality late indica rice by using radio frequency heating technology. Background technique [0002] China is the world's largest rice producer, with a rice output of about 200 million tons, of which about 50% is mid-late indica rice. Middle and late indica rice is the staple food of people in the vast southern regions of China because of its good eating quality. In major rice-producing areas such as Hubei and Hunan, the harvest season for high-quality late indica rice is usually in late autumn and early winter. At this time, the temperature is low and the weather is cloudy and rainy. As a result, the moisture content of the purchased rice is generally higher than the national standard, even as high as 20. %above. High-moisture rice is stored directly in the warehouse, which will cause pests, mildew, sprouting and other h...

AI Technical Summary

Problems solved by technology

However, this method ignores the advantages of radio frequency technology in drying food with low water activity. After the food is dried by radio frequency for a period of time, microwave drying and infrared drying are used to make the process very complicated, and this method is more suitable for better processing performance. Japonica rice with a high rate of polished rice is not suitable for high-quality late indica rice with poor processing performance and low rate of polished rice

[0006] Therefore, drying is a necessary process before storage and processing of high-moisture high-quality late indica rice, and is an important way to improve the economic benefits of rice storage and processing enterprises. However, there is no method on the market that uses radio frequency heating technology to improve the whole rice rate of high-quality late indica rice