PGO装置精馏塔结垢原因分析及防护对策研究

发布时间：2018-03-14 06:20

本文选题：乙烯裂解焦油　切入点：精馏塔　出处：《华东理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：萘是一种重要的化工原料,广泛用于合成燃料和树脂。中石油股份公司吉林石化分公司高碳醇厂PGO装置是利用乙烯生产过程中产生的裂解乙烯焦油来生产萘的核心装置。精馏塔C-101、C-102、C-103是PGO装置的关键设备,其能否长周期运转对装置的正常运行影响很大。自吉化公司PGO装置开工以来,精馏塔结垢问题一直比较严重,大大影响了装置的平稳生产。本文首先对PGO装置精馏塔结垢的原因进行研究,通过现场取样,采用等离子体光谱测试和灼烧实验对结垢物进行分析,确定了结垢物的化学成分主要是芳烃类树脂,结垢原因是原料中的苯乙烯和茚类有机物发生了聚合反应,聚合生成的树脂粘附到填料表面,造成了精馏塔堵塞。然后,搭建了精馏塔模拟实验装置,对原料的热稳定性进行研究,结果表明原料具有较强烈的聚合倾向,易于形成高分子聚合物。最后,研究采取了在工艺流程中添加EC3142B型阻聚剂的方法,并应用到生产装置,经过现场应用考核,添加阻聚剂在一定程度上延缓了精馏塔的结垢,保证了PGO装置的平稳生产。
[Abstract]:Naphthalene is an important chemical raw material, The PGO plant of Jilin Petrochemical Company of PetroChina is the core unit to produce naphthalene from cracking ethylene tar produced in ethylene production process. The distillation column C-101C 102C 103 is the key equipment of PGO unit. Its long period operation has a great influence on the normal operation of the unit. Since the commencement of the PGO plant in Jihua Company, the scale problem of the distillation column has been serious. In this paper, the cause of scaling in the distillation column of PGO plant is studied, and the fouling matter is analyzed by plasma spectrum test and burning experiment through field sampling. It is determined that the chemical composition of the scaling compound is mainly aromatics resin, and the scaling is caused by the polymerization of styrene and indene organic compounds in the raw material, and the resin formed by the polymerization adheres to the surface of the filler, resulting in the blockage of the distillation column. The thermal stability of the raw material is studied. The results show that the raw material has a strong polymerization tendency and is easy to form polymer. The method of adding EC3142B type polymerization inhibitor to the process flow was adopted and applied to the production plant. After field application examination, the addition of inhibitor retarded the scaling of the distillation tower to a certain extent and ensured the smooth production of the PGO unit.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ053.5

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