The principles of purification units with water and alkali wash, and the characteristics of new technology of complex tower and effects of innovation were discussed.

详细阐述了水洗碱洗净化装置的原理及组合塔新技术的特点和改进后的效果。

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The technical innovation of C-1340 caustic washer in Guangzhou ethylene unit is introduced in the article. In the technical innovation, new tower technology is applied, yielding remarkable results.

介绍了广石化乙烯装置C-1340碱洗塔的技术改造情况，指出用新型塔器技术改造板式碱洗塔的效果是十分显著的。

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Separation characteristics of packing tower were introduced. The results on lower separation efficiency of present benzyl chloride rectifier were analysed, and the innovation ideas were put for-ward.

介绍了填料塔的分离特点，分析了现有氯化苄精馏塔分离效率低的原因，并提出了改进设想。

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