利用流程模拟技术实现气分装置操作优化

发布时间：2018-07-07 17:26

本文选题：气体分馏装置 + 操作优化　；参考：《华南理工大学》2015年硕士论文

【摘要】：炼油过程气体分馏装置是从液化石油气中分离高纯精丙烯(通常纯度99.5%)的工艺,由于产品纯度高,导致精馏过程分离级数多,回流比大,能耗高。因此平衡产品质量、收率和能耗之间的矛盾是气分装置操作优化的核心,也是单纯凭经验所无法解决的问题,因而促进了流程模拟技术在气分生产过程的应用。本文首先建立了中石化海南炼化60万吨/年气体分馏装置的ASPEN全流程模拟模型,针对加工工质为C2~C5低碳轻烃,选用Peng-Robinson热力学状态方程,并通过现场操作模拟拟合,确定了脱丙烷塔、脱乙烷塔和精丙烯塔的塔板效率以及全部再沸器和换热器的效率,实现了仿真操作;继而进行了脱丙烷塔、脱乙烷塔和精丙烯塔的进料板位置优选,为现场操作调整提供了具体的指导;最后,以最小化装置有效能损失为目标,确定了装置优化运行参数。另外,针对精丙烯塔塔底、塔顶温差较小的特点,提出了精丙烯塔热泵流程改造方案。通过对进料板位置、操作压力、回流比进行调整,装置能耗有了显著降低,由47.11千克标油/t降为45.46千克标油/t。
[Abstract]:The gas fractionation unit in refining process is a process for separating high purity propylene from liquefied petroleum gas (usually 99.5% purity). Due to the high purity of the product, there are many separation orders, high reflux ratio and high energy consumption in the distillation process. Therefore, balancing the contradiction between product quality, yield and energy consumption is the core of the operation optimization of gas separation unit, and it is also a problem that can not be solved by experience alone, thus promoting the application of process simulation technology in the process of gas separation production. In this paper, the whole process simulation model of Sinopec Hainan 600000 t / a gas fractionation unit is established. The Peng-Robinson thermodynamic equation of state is selected for the low carbon light hydrocarbon of C2C5, and the simulation is carried out in the field. The tray efficiency of depropane column, deethane tower and refined propylene column, as well as the efficiency of all reboiler and heat exchanger are determined, and the simulation operation is realized, and the feeding plate position of depropane tower, deethane tower and refined propylene tower is selected. At last, aiming at minimizing the effective loss of the device, the optimal operation parameters of the device are determined. In addition, according to the characteristics of the bottom of the refined propylene tower and the small temperature difference at the top of the tower, the revamping scheme of the heat pump process of the refined propylene tower is put forward. By adjusting the feed plate position, operating pressure and reflux ratio, the energy consumption of the unit has been significantly reduced from 47.11 kg / t to 45.46 kg / t.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE96

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