水稻秸秆营养穴盘热风辅助微波干燥工艺参数优化

Optimization of Technological Parameters for Hot Air-assisted Microwave Drying of Straw-based Nutrient Seedling-planting Bowl Tray

为研究水稻秸秆营养穴盘在不同条件下的热风辅助微波干燥最佳工艺,以水稻秸秆营养穴盘的干燥速率和干燥后的形变量为指标,利用响应面研究微波功率、加热温度和热风速度对水稻秸秆营养穴盘热风辅助微波干燥工艺的影响,建立二次多项式的回归模型,并进行干燥工艺优化。结果表明:回归模型拟合性较高,可以较好地描述水稻秸秆营养穴盘的干燥过程;水稻秸秆营养穴盘热风辅助微波干燥的最佳工艺参数,即微波功率为1600 W、加热温度为60℃、热风速度为15 m/s时,干燥速率最快为4.015%/min,形变量最小为1.522 cm。研究结果可为促进水稻秸秆营养穴盘推广与应用提供重要的理论支撑及技术支持。

In order to study the optimal process of hot air-assisted microwave drying of straw-based nutrient seedling-growing bowl tray under different conditions,the drying rate and deformation variables of straw-based nutrient seedling-growing bowl tray were used as indicators,and the effects of microwave power,heating temperature and hot air velocity on the hot air-assisted microwave drying process of straw-based nutrient seedling-growing bowl tray were studied by using the response surface,and a quadratic polynomial regression model was established,and the drying process was optimized.The results showed that the regression model has high fitting ability,which can better describe the drying process of straw-based nutrient seedling-growing bowl tray.The optimal process parameters of hot air-assisted microwave drying of straw-based nutrient seedling-growing bowl tray were microwave power 1600W,heating temperature 60℃,hot air speed 15m/s,the fastest drying rate was 4.015%/min,and the minimum shape variable was 1.522cm.This study provides important theoretical support and technical support for promoting the promotion and application of straw-based nutrient seedling-growing bowl tray.