伴生气轻烃回收液化气工艺的设计说明

()CHINAUNIVERSITY OF PETROLEUM毕 业 设 计100×104Nm3/d 伴生气轻烃回收液化气工艺设计院系名称：化学工程学院专业名称：化学工程与工艺学生： 郭小丰 学 号：2024031 317 指导老师：文慧 完成日期 2024 年 6 月 6 日100×104Nm3/d 伴生气轻烃回收液化气工艺设计摘要辽河油田拟新建一套处理规模为 100×104Nm3/d 的轻烃回收液化气装置。通过模拟计算，分析了液化气的收率与制冷温度和总能耗之间的关系，确定了制冷温度为-92℃，丙烷收率为 81.00%，液化气收率为 87.83%的最优工艺参数。针对本工程特点，最终确定了双低温分离器和膨胀机制冷加节流膨胀制冷的同轴增压的轻烃回收方案。该方案采纳了冷箱系统，增强了流程装置对组分波动的适应性，减少了冷剂装置的投资，能量利用率高；采纳双低温分离塔减少了脱乙烷塔的进料，从而减少了塔设备的投资；回收一级与二级压缩后的原料气的高焓值来加热脱乙烷塔和脱丁烷塔的再沸器，节约 1177.8kW。关键词：天然气；轻烃回收装置；方案设计Recovery of Liquefied Petroleum Gas From1 millionm3 / d NaturalGasAbstractLiaohe Oilfield plans to build aninstallation about light hydrocarbon recovery of liquefied petroleum gas whichprocesses a scale of 1 million m3/d natural gas. The relationship between the yield of liquefied petroleum gas and refrigeration temperature and total energy consumption by simulation is analyzed to determine the optimal process parameters that the refrigeration temperature of -92℃, propane yield of 81.00% and liquefied gas yield of 87.83%.Because of characteristics of this project, coaxial pressurized light hydrocarbon recovery program is ultimately determined that is with the pairs of low temperature separation column and the expansion plus throttle expansion cooling mechanism. The program uses a cold box system, so it enhances the adaptability of the process device to component fluctuations and efficiency of energy and reduces the cost of the refrigerant system. Adding dual low temperature separationmachinescan...