根据精馏段和提馏段热耦合的相对位置不同，外部热耦合复合精馏塔系统可分为对称型和非对称型两种结构。
According to the relative positions of thermal coupled rectifying and stripping sections, the configurations of the system involved two types, symmetrical EHIDDiC and asymmetrical EHIDDiC.
反应精馏塔由原来的复合型塔改为单纯筛板塔，操作清洗简单、设备费用低。
The column of reactive distillation was improved from compound tower to sieve tray tower which is famous for its lower cost of equipment and simpler operation and cleaning.
在此基础上对原有工艺和新工艺精馏塔板进行设计，塔板选用近年来广泛应用的新型多溢流复合斜孔塔板。
The trays in the distillation column were designed with new multi overflow compound slant hole trays commonly used in the recent years.
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