太子参大规模热风烘干干燥工艺

Hot air drying technology for large-scale production of Pseudostellaria heterophylla

采用不同单温度及梯度升温进行太子参热风烘干研究,以太子参脱水率变化情况及外观品相为观测指标,确定太子参热风烘干干燥工艺.研究结果显示,太子参烘干采用梯度升温烘干较单温度烘干速度快,通过小试、中试及放大生产实验,确定最佳的大生产烘干工艺为50℃烘干6 h再60℃烘干17~18 h,此工艺条件下烘干的太子参干品表面颜色淡黄,皱缩程度低,外观品相好.

Hot air drying was used to heat Pseudostellaria heterophylla at different single and gradient temperatures.The drying efficiency of P.heterophylla was determined based on the variation of dehydration rate and appearance.The results showed that gradient heating drying was faster than single temperature drying.Through small-scale,pilot-scale and large-scale production tests,the optimal drying process for large-scale production was drying at 50℃for 6h and at 60℃for 17-18 h.The drying products of P.heterophylla had yellowish surface,low shrinkage and good appearance.