流程模拟在气体分馏装置扩能优化改造中的应用  

Application of Process Simulation in Capacity Expansion of Gas Fractionation Unit

作　　者：李宁 Li Ning(Luoyang Petrochemical Engineering Design Co.,Ltd.,Luoyang Henan 471012)

机构地区：[1]洛阳石化工程设计有限公司,河南洛阳471012

出　　处：《中外能源》2023年第12期66-72,共7页Sino-Global Energy

摘　　要：通过流程模拟软件对某炼油厂65×10^(4)t/a气体分馏装置进行建模,利用模拟数据与操作数据的对比,验证模型的正确性,然后对模型进行扩能模拟优化;在保证扩能后装置处理能力达到70×10^(4)t/a,丙烯产品纯度达到99.6%(物质的量分数),丙烷产品纯度达到99.8%(物质的量分数)控制指标的前提下,分别对各塔的分离目的 及优化目标进行明确。通过对操作压力、进料比例及塔顶馏出率等关键操作参数进行优化调整,得出各塔最佳操作条件及影响装置提高处理能力的主要瓶颈,以满足装置扩能需求;项目仅对影响扩能的主要瓶颈进行改造,改造工程量小,投资成本低,可为同类装置离线优化提供借鉴;装置改造后,产品分馏效果较好,产品质量合格,能耗较低,年处理能力达到70×10^(4)t/a。扩能后设备操作压力低,装置能耗为2056.7MJ/t,在中国石化系统同类装置内属较优水平。Process simulation software was used to model the 650kt/a gas fractionation unit in a refinery,the validity of the model was verified by comparing the simulation data with operational data,and the capacity expansion of the unit was simulated.On the premise of ensuring that the processing capacity of the unit reaches 700kt/a,the product purity of propylene reaches 99.6%(mol)and the product purity of propane reaches 99.8%(mol)after capacity expansion,the separation objectives and optimization goals of each tower were clarified separately.By optimizing and adjusting key operating parameters such as operating pressure,feed ratio and overhead distillation rate,the optimal operating conditions for each tower and the main bottlenecks that affect capacity expansion were determined,so as to meet the expansion needs of the unit.The unit was transformed only to remove the main bottlenecks that affect capacity expansion.With a small amount of transformation work and low investment cost,it provides reference for the off-line optimization of similar units.After the transformation,good product fractionation effect was achieved,the product quality met the specifications,the energy consumption was low,and the annual processing capacity of the unit reached 700kt/a.After capacity expansion,the operating pressure of equipment was low,and the energy consumption of the unit was 2056.7MJ/t,reaching a relatively advanced level among similar units in SINOPEC.

关 键 词：气体分馏装置 模拟 扩能 优化 改造 

分 类 号：TE96[石油与天然气工程—石油机械设备]