UC知道请各位英语高手帮忙,拜托,急用,有重谢!!
来源：百度知道 编辑：UC知道 时间：2024/06/13 22:27:32
低温浓缩回流提取机组是综合了回流，渗漉提取，逆流提取与热回流抽提浓缩四种提取原理，将中药的提取、浓缩两道工序同时进行，一次完成中药提取、浓缩新工艺，并改变提取罐内的工作与常压的高温煎煮工艺，利用真空负压进行低温提取低温浓缩，使提取罐内的工作温度控制在60℃~70℃，浓缩温度控制在50℃~60℃，保证了药材有效成分不被蒸了流失。同时将提取、浓缩产生的二次蒸发进入回流冷凝器成热冷凝液，回落到提取罐中，作为新溶剂加到药材面上，不断更新固——液两相接口层,使新溶剂从上至下通过药材层，起了动态渗漉作用，溶解药材的可溶性物质到达提取罐底部，又进入浓缩器进行浓缩。根据多年的实践与研究，中药材有效成份提取过程是溶质由固相传递到液相的传质过程，用扩散理论解释，就是溶质从高浓度向低浓度方向渗透的过程，在真空汽化热的作用下，浓度差越大，有效成份提出率越高。回流的热冷凝液约在2.5-3小时内将提取罐原溶剂全部更换一次，使提取罐内中药材组织中溶质与浸出液中的溶质在单位时间能保持一个较高的浓度差，既继承了传统提取罐二次提法的工艺，又节省了50%溶剂投放量.
Low temperature inspissation reflux's withdrawing a machine set is to synthesize a reflux, the 渗漉 withdraws, the against the current withdraws and takes out with hot reflux and lifts and condenses 4 kinds and withdraws principle, withdraw, condensing Chinese herbal medicine two work prefaces carry on in the meantime, a completion Chinese herbal medicine withdraws, concentrated new craft, and change and withdraw the work in the bottle and often press of heat decoction craft, make use of vacuum negative press and carry on low temperature and withdraw low temperature concentrated, make and withdraw work temperature in the bottle a control in 60 ℃ ~70 ℃ , concentrated temperature control in 50 ℃ ~60 ℃ , promised the medicine material valid composition to be steamed not and run off.Will withdraw, condense two output evaporations to get into the reflux congealed machine a hot and congealed liquid in the meantime, drop to withdraw in the bottle, is a new melting agent to add a medicine