天然气压缩机组振动隐患治理

Controlling measures for the hidden dangers caused by the vibration of gas compressor sets

往复式天然气压缩机组普遍存在着振动超标的问题,对安全生产构成重大隐患。为了探求压缩机振动超标的主要原因和相关的治理措施,以中国石油长庆油田公司苏里格气田第二天然气处理厂为例,基于能量守恒定律,从分析地基土壤、压缩机橇体构件振动等方面入手,对压缩机机组运行过程中的振动进行了系统研究,提出了从压缩机单台治理到6台共振治理、从压缩机本体治理到基础治理的压缩机振动超标治理方案。结果表明:(1)压缩机振动超标的主要原因为6台压缩机基础的共振,具体原因包括压缩机基础和工艺管线周边土壤压实度较差、气流脉动、管线共振和压缩机本体振动;(2)通过开挖夯实压缩机基础和工艺管线周边土壤、设备加固、气流控制、启机程序优化、压缩机入口汇管调整等治理措施,压缩机振动值可以稳定保持在标准值之内,故障率明显降低,机组运行效率得到提升。该压缩机振动超标的治理方法可为其他天然气处理厂的安全运行提供借鉴。

Reciprocating natural gas compressor sets have a widespread problem of excessive vibration,which leads to major hidden dangers to safe production.In this paper,the No.2Gas Processing Plant of the Sulige Gas Field,operated by the PetroChina Changqing Oilfield Company,was taken as an example to explore the main reasons and controlling measures for such a problem.Based on the energy conservation law,the vibration of the operating compressor sets was studied systematically from the aspects of foundation soil and compressor skid components.Then,a compressor over-vibration control scheme was put forward from the single one to the six-compressor resonance control and from the compressor body to foundation control.And the following research results were obtained.First,the main reason for the excessive vibration of compressors is the resonance of six compressor foundations,and the specific reasons include poor soil compaction around the compressor foundation and process piping,gas pulsation,pipeline resonance and compressor body vibration.Second,by taking some controlling measures,including excavating and tamping the soil around the compressor foundation and process piping,reinforcing the equipment,controlling gas flow,optimizing the startup program and adjusting compressor inlet manifold,the vibration value of the compressor can be kept in the range of standard value,the failure rate is reduced significantly,and the operating efficiency of compressor sets is thus improved.In conclusion,these controlling measures for compressor over-vibration can provide a reference for the safe operation of other natural gas processing plants.