西气东输站场放空天然气回收需求与工艺  

Recovery and process of stations vent gas in West-to-East Gas Pipeline

作　　者：王洪喜[1] 孙盛[2] 吴中林 关中原[2] 

机构地区：[1]西安工业大学机电工程学院,陕西西安710032 [2]中国石油管道科技研究中心,河北廊坊065000 [3]中国石油北京天然气管道有限公司,北京100101

出　　处：《油气储运》2012年第5期363-365,406,共3页Oil & Gas Storage and Transportation

摘　　要：天然气长输管道增压站和分输站放空主要包括紧急抢修放空和计划性放空,前者具有随机性,单次放空量大,不具备回收的技术条件,后者主要指分离器排污放空和压缩机定期检修放空,具有较强的计划性和一定的规律性,具有良好的回收基础条件和回收价值。西气东输管道站场压缩机检修和分离器排污两项放空量之和占总放空量的50%以上,对放空天然气进行回收是可行和必要的。为此,设计了一套以CNG压缩机为核心的站场放空天然气回收工艺系统,可对站场因设备维修、排污等产生的放空天然气进行回收并重新注入上游管道、下游管道或分输管道,达到节能减排的目的。Gas venting in compressor station and offtake station in the long-distance gas pipeline mainly includes emergency venting and planned venting.The former has randomness with big volume gas venting in a turn,usually free of technical condition to recover,and the latter mainly refers to separator blow-off venting and periodic maintenance venting of compressors,with confirmed plans or periodicity and recovery economy.Statistics shows that the gas venting from compressor maintenance and separator blow-off accounts for more than 50% of the total venting volume in stations of West-to-East Gas Pipeline.Therefore,it is feasible and necessary to recover vented natural gas.To this end,a station vent natural gas recovery processing system with the core of CNG compressors is designed,which can recover the vented natural gas produced from equipment maintenance and blow-off in the station and re-inject it into the upstream pipeline,downstream pipeline or offtake pipeline to achieve the goal of energy saving and emission reduction.

关 键 词：西气东输 站场 放空 天然气 回收 压缩天然气 

分 类 号：TE991[石油与天然气工程—石油机械设备]