稻谷多场协同干燥系统设计与试验

Design and Experiment of Multi-field Synergy Drying System for Paddy

为了提高稻谷的干燥效率、加快稻谷的干燥速率及改善稻谷的干燥品质,基于稻谷水分结合能的变化特征,设计了一种红外线热辐射、逆混流引风、多场协同干燥系统,能够强化稻谷表面传热,实现了闪蒸降温干燥,改善了稻谷干燥效果。试验结果表明:红外线热辐射和逆混流引风干燥可使稻谷的干燥温度较传统的横流干燥方法降低11℃,平均去水速率提高2倍以上,爆腰增率可控制在1%以下。研究结果为实现稻谷优质、高效、节能干燥和工艺装备开发提供了参考。

In order to increasing paddy＇ s drying efficiency, accelerating drying rate and improving drying quality. This article, based on the change characteristics of paddy moisture binding energy, designed a kind of drying system with the features of infrared thermal radiation, inducing air by back-mix-flow and multi- field synergy, which could strongly transfer heat on surface , realize the cool with flash drying and improve the drying effects for paddy. The experiment re- sults showed the infrared thermal radiation and inducing air by back-mix-flow made paddy＇ s drying temperature lower 11℃ than cross-flow drying, the average of dehydration rate improved more than 2 times, and also increased crack percentage was controlled under 1%. The research results offer reference to get the high quality paddy, energy-efficient drying and develop craft equipment.