延迟焦化装置富气压缩机汽轮机故障分析  

FAILURE ANALYSIS OF STEAM TURBINE OF RICH GAS COMPRESSOR IN DELAYED COKING UNIT

作　　者：马国豪[1] Ma Guohao(SINOPEC Jinan Company,Jinan,Shandong,250101)

机构地区：[1]中国石油化工股份有限公司济南分公司,山东济南250101

出　　处：《石油化工设备技术》2021年第5期61-66,I0005,I0006,共8页Petrochemical Equipment Technology

摘　　要：延迟焦化装置富气压缩机运行工况的好坏直接关系到整个装置是否能够平稳运行,而汽轮机更是驱动机组运行的最重要组成部分。文章针对某装置延迟焦化富气压缩机在运行周期中出现的一些问题进行浅析,根据拆检情况并结合运行中的参数分析了故障发生的原因。同时,对2020年7月检修后机组开车过程中遇到的问题以及运行之中出现的状况进行了总结,重点分析了机组开车阶段调速系统出现的现象以及在运行之中汽轮机进汽量的几次大幅度波动;此外,还对调速系统整体更换之后开车过程中遇到的问题进行了分析。经过此次故障检修后得出以下结论:汽轮机调速汽阀螺栓断裂是导致汽轮机做功能力下降的直接原因;连续两个长周期运行后未对过流承压部件进行更换是故障的间接原因;炼油装置大机组的每一次检修都决定了整个装置能否长周期运行,因此检修深度与精度至关重要。The operation condition of the rich gas compressor in delayed coking unit is directly related to the smooth operation of the whole unit,and the steam turbine is the most important part of the driving unit.This paper analyzed some problems of rich gas compressor in delayed coking unit during the operation period.Combining with the operation parameters,it analyzed the causes of the failure according to the disassembly and inspection situation.Meanwhile,the paper summarized the problems encountered in the start-up process of the unit after maintenance in July 2020 and the situation in operation.It focused on analyzing the phenomenon of the speed control system in the start-up stage of the unit and several large fluctuations of the steam turbine inlet volume in operation.In addition,it also analyzed the problems encountered in the process of starting-up after the overall replacement of the speed control system.After this troubleshooting,it was concluded that the bolt fracture of the governing valve was the direct cause of the decline of the turbine's power capacity,and the indirect cause of the failure was that the pressure bearing parts were not replaced after two consecutive long-term operation.Each overhaul of a large oil refining unit determines whether or not the whole unit could run for a long period of time,so the depth and accuracy of each overhaul of a large unit plays a crucial role.

关 键 词：延迟焦化装置 富气压缩机 汽轮机 调速装置 

分 类 号：TE96[石油与天然气工程—石油机械设备]