催化裂化装置分馏及吸收稳定系统模拟与优化

石油炼制与化工 ›› 2025, Vol. 56 ›› Issue (9): 99-105.

催化裂化装置分馏及吸收稳定系统模拟与优化

祝功胜,叶启亮,杨敬一,袁佩青

华东理工大学化工学院

收稿日期:2025-03-11 修回日期:2025-04-14 出版日期:2025-09-12 发布日期:2025-08-28
通讯作者: 祝功胜 E-mail:Y82220161@mail.ecust.edu.cn
基金资助:
国家自然科学基金资助项目(No. 22178113)

SIMULATION AND OPTIMIZATION OF FRACTIONATION AND ABSORPTION-STABILIZATION SYSTEM IN CATALYTIC CRACKING UNIT

Received:2025-03-11 Revised:2025-04-14 Online:2025-09-12 Published:2025-08-28
Supported by:
National Natural Science Foundation of China funded projects

摘要/Abstract

摘要： 利用Aspen Plus软件对某炼油厂2.0 Mt/a催化裂化装置分馏及吸收稳定系统进行全流程模拟，并运用灵敏度分析方法对分馏及吸收稳定系统的工艺参数进行优化。在分馏系统中通过调整顶循环量和一中循环量，提高了汽柴油质量，同时使高温位取热比例增加了5.26百分点，这部分热量可用于产生高温蒸汽；在吸收稳定系统中，重点考察了吸收塔内粗汽油进料位置、吸收塔液气比、富吸收油返回分馏塔位置、稳定塔进料位置和回流比对产品质量的影响，通过系统参数的模拟优化，产品分布得到显著改善，具体表现为：干气中C₃+体积分数降低54.3%，液化气中（C₂+C₅）体积分数降低7.5%，稳定汽油中（C₃+C₄）质量分数降低43.2%。

关键词: 催化裂化, 分馏及吸收稳定系统, 灵敏度分析, 模拟, 优化

Abstract: The full process simulation of the 2 Mt/a catalytic cracking unit's fractionation and absorption-stabilization system at a certain refinery was conducted using Aspen Plus, and the process parameters of the distillation and absorption-stabilization system were optimized using sensitivity analysis methods. In the distillation system, by adjusting the top circulation and the first middle circulation, the quality of gasoline and diesel was improved, while the high-temperature heat extraction ratio increased by 5.26 percentage points, which can be used to generate high-temperature steam; in the absorption-stabilization system, the focus was on examining the impact of the feed position of the crude gasoline in the absorption tower, the liquid-gas ratio in the absorption tower, the return position of the rich absorption oil to the distillation tower, the feed position of the stabilization tower, and the reflux ratio on product quality. Through parameter simulation optimization, the product quality was significantly improved. Specifically, the volume fraction of C₃+ in dry gasdecreased by 54.3%, the volume fraction of (C₂+C₅)in liquefied gasdecreased by 7.5%, and the mass fraction of (C₃+C₄)in stabilized gasoline decreased by 43.2%.

Key words: catalytic cracking, fractionation and absorption-stabilization system, sensitivity analysis, simulation, optimization

祝功胜叶启亮杨敬一袁佩青. 催化裂化装置分馏及吸收稳定系统模拟与优化[J]. 石油炼制与化工, 2025, 56(9): 99-105.

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