丹参浸膏真空带式干燥工艺的研究

Optimization for vacuum belt drying process of Radix Salvia Miltiorrhiza extract

目的研究并确定丹参浸膏真空带式干燥的最佳工艺条件。方法采用正交试验法和多指标综合评分法,以丹参浸膏干燥产品含水率和丹参浸膏干燥速率为考察指标,对影响丹参浸膏真空带式干燥过程的因素进行考察。结果丹参浸膏真空带式干燥的最佳工艺条件为丹参浸膏含水率40%,丹参浸膏进料速率1.5 mL/s,输送带速率5 cm/m in。结论采用真空带式干燥工艺生产丹参浸膏干燥颗粒,干燥产品含水率低,干燥速率快。

Objective To select the optimum conditions of the vacuum belt drying process of Radix Salvia Miltiorrhiza （RSM） extract. MethOds The process was studied by using orthogonal test design and grading method for multi-index on the parameters of the water content of dried product and drying rate of RSM extract, the average quantity of vapour during unit time span, as the index. Results The optimum process determined by the grading method was listed as follows： water content of the extract before drying was 40%, the feeding speed was 1.5 mL/s, the belt speed was 5 cm/min. Conclusion This technology can increase the average quantity of vapour during unit time span and the drying product has high quality with lower water content and desirable drying rate.