Researching The Key Parameters Of Chinese Dates Powder Processing Techniques

Chinese date as our specialty and its health effects pays more and more attention. To improve product quality jujube, to promote the development of jujube industry, this paper, systematically studying jujubes vacuum drying, lyophilization and smashing by using vacuum dryer, vacuum freeze-dryer, herbal medicine grinder and ultra fine pulverizer.Providing a theoretical reference for jujubes production.The research focuses on vacuum drying characteristics and suiTab. drying models of jujubes.rate and moisture content changes as time goes by while vacuum dying that means a typical rate drying period. Page model fits best in 10 thin layer drying model, which can accurately reflect the drying process.Take temperature and slice thickness as experiment factor, and jujubes retention rate of Vitamin C as experiment indicator for univariate and dual factor test, the impact is quite significant.Taking temperature and thickness of Chinese date as factors,and jujubes retention rate of Vitamin C as experiment indicator for univariate and dual factor test of lyophilization,the impact is quite significant.To obtain the best combination parameters of jujube and the regular pattern,taking the retention rate of Vitamin C as experiment indicator, establishing the regression model through quadratic rotational regression combination design.the optimal parameters for the freeze-dried jujube are: thickness 5.5mm, for sublimation drying temperature -22.1℃, dried for analytical temperature 20.6℃, the best corresponding Vitamin C content is 237.513mg/100g. Response surface analysis shows that thickness is the main factors influencing the indicator, sublimation and analytical temperature interaction is not obvious.To reserch the initial grinding process of jujube,taking the initial moisture content jujube, thickness and temperature as experiment factors,and the filter rate, Vitamin C content and settlement height as experiment indicator by using Chinese herbal medicine grinder.the impact is quite significant.Orthogonal test showed thatmoisture content and temperature have an effect on the Settlement height.optimum combination is: particle-size 1.5mm, moisture content 1%, temperature -10℃.To reserch the fashioning process of jujube powder,taking time, temperature and intervals as experiment factors,and the filter rate, Vitamin C content and settlement height as experiment indicator by using ultra fine pulverizer.the impact is quite significant.Orthogonal test showed this three factors have an effect on the Settlement height.optimum combination is : time 45min, temperature -10℃and intervals 3.