The dynamic characteristic of concentration change on plates of batch rectification column in no reflux start up process and in no reflux period of pulse operation process have been calculated.
建立了间歇精馏无回流操作过程的数学模型，采用四阶龙格库塔法求解初值问题，计算无回流开工过程及间歇精馏脉动操作过程中无回流周期内各塔板浓度变化的动态特性。
The original batch recovery process was replaced by the process of neutralization setting and continuous rectification.
采用中和分层与连续精馏相结合的工艺取代了原有的间歇回收工艺。
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