pack height造句

• The influence of packing height , ratio of water to entrainer and acetic acid initial concentration to separation effect of azeotropic distillation was studied in detail . simulation calculations of general distillation and azeotropic distillation were carried out . the influence of reflux ratio , theoretical plate , feed position , feed temperature and feed concentration to distillation process were discussed
  ( 3 )与普通精馏比较，分离要求相同时，共沸精馏时所需要的理论板数要低于普通精馏所需要的理论板数，回流比减小，可降低设备投资70万元，塔釜加热量减少36 % 。