披碱草种子的气流冲击式转筒干燥试验

为研究气流冲击式转筒干燥结构参数（喷管直径、喷嘴高度与喷管倾角）与工艺参数（风温、风速与转筒转速）变化对牧草种子干燥速率与发芽率的影响，该文将气流冲击式转筒干燥技术应用于披碱草种子干燥，并通过Design-Expert 7.0软件对试验进行优化设计，建立了试验条件范围内平均干燥速率的预测模型。试验结果表明：气流冲击式转筒干燥技术可较好的应用于披碱草种子的干燥，干燥后的披碱草种子达到了国家一级种子标准；在试验条件范围内，风温、风速、风温和分支喷管倾角交互作用、风速和转筒转速交互作用对平均干燥速率的影响显著，影响大小依次为：风温＞风速＞风速和转筒转速交互作用＞风温和分支喷管倾角交互作用；各因素及其交互作用对发芽率的影响不显著。该研究为气流冲击式转筒干燥技术应用于种子的干燥提供了技术依据。

Air-impingement rotary drying experiments of Elymus dahuricus seeds

For studying the impact of air-impingement rotary drying structural parameters (nozzle diameter, nozzle height and nozzle angle) and process parameters (air temperature, wind speed and rotor speed) changes in the drying rate and germination rate of herbage seeds, air-impingement rotary drying technology was applied to Elymus dahuricus seeds. A predicted model of the average drying rate was established through the application of Design-Expert 7.0 software to optimize the experimental design. Experimental results showed that air-impingement rotary drying technology was better for Elymus dahuricus seeds drying and the drying results reached national first-class seed quality standard. Within the experimental conditions, the effects of air temperature, wind speed, the interaction of air temperature and nozzle angle, the interaction of wind speed and rotary speed on the average drying rate were significant and the size of the order was air temperature > wind speed > the interaction of wind speed and rotary speed > the interaction of air temperature and nozzle angle. The effects of all factors and their two-factor interactions on germination rate were not significant. This research can provide technical reference for applying the air-impingement rotary drying technology in Elymus dahuricus seeds drying.