Precise Control Method of Herbal Medicine Drying Based on Terahertz Technology
In order to solve the main problems faced in the current drying process of herbal medicine such as high drying energy con-sumption,low efficiency and uneven drying quality,a method of herbal medicine drying control based on terahertz technology is pro-posed.The method is based on the establishment of terahertz wave radiation frequency model to determine the terahertz wave band that is only sensitive to water but not to the main medicinal components of herbs,in order to accurately determine the temperature range of the terahertz plate.The Weibull model is selected as the kinetic model for drying of herbs,and then the dual-objective model with the shortest drying time and the lowest carbon emission is constructed and solved,and the optimal parameter solution sets of drying such as the thickness of materials,humidity,etc.are determined.The optimal parameter solution set for drying was deter-mined.This paper took the drying of Oenothera biennis root as an example,the optimal parameter solution set is determined as:fan wind speed 1.5 m/s,material thickness 5 cm,temperature of terahertz plate 130 ℃ and humidity 20％.Practice showed that this con-trol method can effectively reduce the drying energy consumption and cost,and substantially improve the drying efficiency and quali-ty by accurately setting the drying parameters of Chinese herbs.
Terahertz technologyChinese herbal medicinedryprecise control
万方数据
维普
