压缩机防喘振阀  ,动作  ,调节阀PID  ,修改  ,天然气压力  ,波动 ," /> 压缩机防喘振阀  ,动作  ,调节阀PID  ,修改  ,天然气压力  ,波动 ,"/>  ,compressor anti-surge valve,action,PID of regulating valve,modification,natural gas pressure,fluctuation ,"/> <p class="MsoNormal" align="left" style="text-align:left;"> <b>压缩机防喘振阀动作引发装置停车原因分析及措施<span></span></b>

石油化工设计 ›› 2024, Vol. 41 ›› Issue (1): 4-10.doi: 10.3969/j.issn.1005-8168.2024.01.002

• 设计技术 • 上一篇    下一篇

压缩机防喘振阀动作引发装置停车原因分析及措施

张锡德,刘  军,康宝健,秦  旭,钟继斌   

  1. 中国石油天然气股份有限公司塔里木石化分公司,新疆 库尔勒 841000
  • 收稿日期:2023-07-28 出版日期:2024-02-25 发布日期:2024-02-26
  • 作者简介:张锡德,男,2004年毕业于中国石油大学化学工程与工艺专业,长期从事于大型往复压缩机、离心式压缩机、蒸汽轮机等设备的运行、维护及管理工作,已发表论文100余篇,正高级工程师。电话:0996-2132527,

Cause Analysis and Measures for Unit Shutdown resulted by Actions of Compressor Anti-surge Valves

Zhang Xide, Liu Jun, Kang Baojian, Qin Xu, Zhong Jibin   

  1. PetroChina Tarim Petrochemical Company, Korla, Xinjiang, 841000

  • Received:2023-07-28 Online:2024-02-25 Published:2024-02-26

摘要:

原料气压缩机流量大幅度波动,波动量达到10 961.65 Nm3/ h,进而压缩机流量从51 768.7 Nm3/h下降至35 768.94 Nm3/h,压缩机喘振阀打开卸载,导致全装置停车。在流量发生波动时工作点在防喘振控制线右侧来回9次同幅度跳动,流量低值为40 807.04 Nm3/h,而压缩机转速波动量为347.14 r/min,可排除机组本身故障导致的流量波动,在流量波动时,调节阀PV2002阀位及阀后压力PSI2002发生同步波动,调节阀阀位波动量达到29.163%,调节阀阀位波动导致压缩机流量波动。对调节阀PID进行18次修改,P值从150改为28,系统响应动作变慢,控制输出发散,同时入厂原料气压力大幅度波动,造成调节阀阀位波动增大,阀后流量波动增大,调节阀PID由自动模式改为手动模式,流量进一步下降,工作点进入喘振线内,喘振阀突然打开。对调节阀PID参数恢复,压缩机调速阀、防喘阀及调节阀PV2002静态测试,同时在管理及技术措施上提出下一步要求。调节阀PID参数改动、原料气压力波动及调节阀状态模式改变是引发压缩机卸载、装置停车的根本原因。

关键词: 压缩机防喘振阀  ')">

压缩机防喘振阀  , 动作  , 调节阀PID  , 修改  , 天然气压力  , 波动

Abstract:

The flow rate of raw gas compressor fluctuated greatly, with a fluctuation of 10961.65 Nm3/h, and then the flow rate decreased from 51768.7 Nm3/h to 35768.94 Nm3/h. The compressor anti-surge valve was opened for unloading, resulting in shutdown of the whole unit. When the flow rate fluctuated, the working point on the right side of the anti-surge control line came back and forth 9 times with the same magnitude, the minimum flow rate was 40807.04 Nm3/h, the compressor speed fluctuation was 347.14 r/min, and the flow fluctuation caused by the fault of the unit itself was eliminated. When the flow rate fluctuated, the regulating valve PV2002 valve position and downstream pressure PSI2002 fluctuated synchronously. The valve position fluctuation of regulating valve reached 29.163%, resulting in fluctuations in compressor flow rate. The PID of regulating valve was modified 18 times, the P value was changed from 150 to 28, the system response slowed down, and the control output diverged. At the same time, the pressure of the incoming raw gas fluctuated significantly, leading to a greater fluctuation in the valve position of regulating valve and a greater fluctuation in the downstream flow rate. The PID of regulating valve was changed from automatic mode to manual mode, resulting in a further decrease in the flow rate. The working point came into the surge line, and the anti-surge valve was opened suddenly. The PID parameters of regulating valve were restored. The compressor speed control valve, anti-surge valve and regulating valve PV2002 were statically tested, and the requirements for management and technical measures were proposed. The changes in PID parameters of regulating valve, the fluctuations in raw gas pressure and the changes in state mode of regulating valve are the fundamental causes of compressor unloading and unit shutdown.

Key words:  ')">

 , compressor anti-surge valve, action, PID of regulating valve, modification, natural gas pressure, fluctuation