多级压缩机气阀寿命评估与极限含水量预测  

Service Life Evaluation and Ultimate Water Content Prediction on Gas Valve of Multistage Compressor

作　　者：李鹏[1,2] 张桐赫[3] 高秋英 孙永尧[1,2] 孙金菊[3] Li Peng;Zhang Tonghe;Gao Qiuying;Sun Yongyao;Sun Jinju(SINOPEC Northwest Company of China Petroleum and Chemical Corporation;Key Laboratory for Enhanced Oil Recovery of Carbonate Fractured-Vuggy Reservoir,Sinopec;School of Energy and Power Engineering,Xian Jiaotong University)

机构地区：[1]中国石油化工股份有限公司西北油田分公司 [2]中国石油化工集团公司碳酸盐岩缝洞型油藏提高采收率重点实验室 [3]西安交通大学能源与动力工程学院

出　　处：《石油机械》2024年第9期115-121,共7页China Petroleum Machinery

基　　金：西安交通大学-中石化股份有限公司西北油田分公司校企合作项目“多介质条件下高压注气工艺研究”(20211182)。

摘　　要：针对目前油田天然气回注具有介质含水多、压力高且变化范围宽等特点,多级往复式压缩机容易产生水击破坏,如何预测极限含水量以有效防止水击是亟需解决的关键问题。采用计算流体力学方法,数值模拟并分析了多级压缩机注入湿气条件下各级气阀阀片的动力学特性,得到了不同天然气含水量的气阀阀片载荷分布。进一步结合nCode计算疲劳,预测了多级压缩机气阀服役寿命与极限含水量。JGC-4型压缩机模拟计算结果表明:随着进气含水量增大,压缩机排气压力提高,气缸内不断析出水滴,致使水击产生,且对高压级影响更为显著,压缩机整机进气含水体积分数上限为0.43%。研究结果可为多级往复式压缩机的应用提供技术支撑。Gas reinjection in oilfields has the characteristics such as water contained in medium,high and wide variable range of pressure,the multistage reciprocating compressor is easily damaged by water hammer.How to predict the ultimate water content to effectively prevent water hammer is a key issue that urgently needs to be solved.In this paper,with the help of the computational fluid dynamics method,the dynamic characteristics of all levels of gas valve plates in multistage compressor under wet gas injection conditions were numerically simulated and analyzed,obtaining the load distribution of gas valve plates under different water contents of natural gas.Then,using the nCode software,the service life and ultimate water content of gas valves in multistage compressor were predicted.The simulation calculation results of JGC-4 compressor show that as the water content of incoming gas increases,the discharge pressure of the compressor increases,and water droplets continuously separates in the cylinder,causing water hammer to occur,which has more obvious influence on high pressure stage.The upper limit of water content in incoming gas of the compressor is 0.43%.The research results provide technical support for the application of multistage reciprocating compressors.

关 键 词：注气用压缩机 往复式压缩机 水击破坏 VOF模型 疲劳寿命 

分 类 号：TE974[石油与天然气工程—石油机械设备]