Unhusked rice drying device under effect of combination of ultrasonic waves and hot air

Abstract

The invention mainly discloses an unhusked rice drying device. The drying process comprises the steps of drying, carrying out ultrasonic tempering, drying, carrying out ultrasonic tempering and cooling. The process comprises the following steps: drying unhusked rice layeredly and sectionally under the condition that low-temperature hot air with certain air speed is used so that a material has a fluidic state; then tempering for a period of time under ultrasonic effect; then drying at high temperature with hot air, and tempering again under the ultrasonic effect after drying completely; meanwhile, recovering dry hot air which performs damp and hot exchange on a first layer and a second layer, and preheating dry media of the second layer and the first layer by an efficient gas heat exchanger via dry hot air; and finally drying the hot air with a certain drying capacity, and cooling the unhusked rice. The unhusked rice drying device can solve the problems of low economic benefit and the like caused by high energy consumption, low heat transfer and mass transfer efficiency, low dried unhusked rice quality of the traditional unhusked rice drying device; the dried unhusked rice has the characteristics of good condition, low breakdown rate and convenience in subsequent processing.

Description

technical field [0001] The invention is equipment for reducing the water content of harvested grains to a safe moisture content for storage, which belongs to the field of drying equipment and also belongs to the field of grain machinery. Background technique [0002] Rice is one of the staple foods in the south. It is a heat-sensitive crop, and if the drying rate is too fast or the parameters are improperly selected, it is easy to cause bursting. Broken waist is one of the main indicators to measure the quality of rice after drying. Secondly, paddy is made up of rigid husk and rice grain, and its husk plays a role in hindering the transfer of moisture inside the grain to the outer surface when drying. Therefore, paddy is more difficult to dry as a complex. Suspension refers to the process of entering the heat preservation section from the drying section in the grain drying process, so that the internal temperature of the grain and the humidity in the grain grain are exchan...

AI Technical Summary

Problems solved by technology

[0006] The invention mainly overcomes the problems of high energy consumption, low heat and mass transfer efficiency, low quality of dried rice and low economic benefits of traditional single hot air drying rice technology.

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