在流程模拟和基本原理分析的基础上，指出FCC装置吸收稳定系统吸收解吸过程存在双向传质，提出了一种新的改进型节能双塔流程。

On the basis of process simulation and basic theoretical analysis, a new energy saving double-column process is proposed for FCC absorption and desorption system with "bi-directional mass transfer".

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