Abstract:

This paper takes the absorption and stabilization system of a 4.2 MM TPY FCC unit in a certain refinery as the research object, uses Aspen Plus software for modeling, the correctness of the model is verified by comparing with the calibration data. By comparing with the original system, it can be seen that the new system reduces the amount of supplementary absorbent by 45 t/h, a decrease of 20.36%, and the total heat load of the system is 60,887.57 kW, a decrease of 19.39%, while the product is without loss and meets the design specifications. The total energy consumption of the modified absorption and stabilization system has decreased by 13,631.14 kW, a decrease of 7.77% compared to the original system. The reduced heat can produce 21 t/h of 0.45 MPa steam, increasing economic benefit of 2.016×10⁷ yuan per year. The expected investment for equipment renovation is about 2×10⁷ yuan, with a payback period of only 1 year. The economic benefit is remarkable.

Key words: FCC unit, absorption and stabilization system, heavy gasoline separator, heavy gasoline desorption tower, energy-saving and consumption-reducing

摘要：

以某炼油厂4.2 Mt/a催化裂化装置吸收稳定系统为研究对象，利用Aspen Plus软件进行建模，通过与标定数据对比，验证了模型的正确性。与原系统对比，新系统在产品无损失且达到设计指标的情况下，补充吸收剂用量减少了45 t/h,下降20.36%,系统总热负荷为60 887.57 kW,下降19.39%;改造后的吸收稳定系统总能耗减少了13 631.14 kW,相比原系统下降7.77%,减少的热量可产0.45 MPa蒸汽21 t/h,经济效益增加2.016×10⁷元/a,设备改造预计投资约2×10⁷元，投资回收期仅1 a,经济效益显著。

关键词: 催化裂化装置, 吸收稳定系统, 重汽油分离器, 重汽油解吸塔, 节能降耗