Grain drying method and system

Abstract

The invention provides a grain drying method and system. The method comprises the steps: an infrared radiation material on the surface of a radiation cylinder absorbs heat generated by a burner for carrying out infrared radiation drying on grains in a radiation section; and waste gas generated by the infrared radiation is mixed with cold air of a main hot air duct, and then the mixed gas flows into a combined type convection section for carrying out convection drying on grains. According to the grain drying method and system, the characteristics of infrared radiation and hot air convection combined drying are combined, the waste gas generated after infrared radiation drying is used to be mixed with the cold air of the main hot air duct, and then the mixed gas flows into a combined type convection section for carrying out convection drying on the grains, thereby achieving the effects of high efficiency and energy saving; the combined type convection section of a drying machine adopts acombined design process, is detachable and replaceable, and respectively realizes forward flow drying, forward and back flow drying or mixed flow drying through changing the modes of the combined typeconvection section; and by adopting infrared radiation and hot air convection combined heat drying, the drying rate of the grains in the drying machine is higher and the quality of the grains after drying is better.

Description

technical field [0001] The invention relates to the technical field of agricultural grain drying, in particular to a grain drying method and system. Background technique [0002] Drying is an important process in modern agricultural production. The moisture content of freshly harvested grains is generally high, and it needs to be dried to a safe moisture content as soon as possible before storage, otherwise it will cause losses due to mildew and germination. However, my country’s annual production of grain exceeds 600 million tons, and about 20% of the grain needs to be dried every year, and the loss due to untimely drying or drying without safe water accounts for 5% of the annual output. [0003] At present, there are about 500 dryer manufacturers in my country, and there are more than 1,000 different types of dryers, mainly continuous and circulating dryers, and there are various forms such as forward flow, mixed flow, and forward and reverse flow. For traditional grain d...

AI Technical Summary

Problems solved by technology

The current research is basically pure infrared radiation drying. However, if the grain exceeds a certain thickness, infrared radiation is difficult to pass through, and the waste gas with high heat generated by infrared radiation drying is directly discharged, and the heat has not been effectively used.

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