故障分折 Fault Analysis
国产压缩机组投产运行问题分析及解决措施赵飞松
(中石化重庆天然气管道有限责任公司，重庆落陵408001)
[摘要]：某天然气长输管道增压站压缩机组全部采用国产化设备，在投产运行中出现了干气密封一级泄漏气无压力及流量、主电机浮动密封环严重磨损转子、机组电机正压通风压力低报连锁停机3项问题；在排查分析过程中，发现盲法兰螺检未紧固到位、密对胶涂抹位置不合理、通风系统接头漏风和仅表管线未清理干净，分别是以上问题的症结点；通过采取相应有效的整改措施，保障了压缩机组安全平稳运行。
[关键词]：天然气长输管道；国产压缩机组；投产运行；问题分析；解决措施
中图分类号：TH45
文献标志码：B
文章编号：1006-2971(2016)02-0061-04
AnalysisoftheOperationProblemsinHomemadeCompressorUnitsandtheSolution ZHAO Feisong
(Sinopec Chongqing Gas Pipeline Company, Fuling 408001, China)
Abstract:A booster station of a certain long natural gas pipeline is installed with an air compressor equipment, which is completel homemade. After commissioning, three problems have been identified during operation: zero pressure and zero flowrate of dry gas sealing primary leakage gas; floating seal ring of the main motor wearing the rotors heavily; the unit motor having a low positive ven tilation pressure, resulting in interlocked shutdown. It was found in troubleshooting that the flange bolts had not been tightened prop-erly, the sealing glue had not been applied to correct places, the ventilation system was leaking air at joints, and the instrumentation pipelines had not been properly cleaned, contributing to the above problems, Appropriate rectification measures were taken, which have ensured the safe and stable operation of the air compressor unit.
Key words:long natural gas pipeline; homemade compressor units; commission; problems analysis; solution
1引信
天然气长输管道需要在沿途建立增压站，通过压缩机多级压缩，实现天然气长距离输送。压缩机是天然气管道输送的“心脏”，有往复式和离心式两种类型。通常往复压缩机适用于工况不稳定、压力高、流量较小的情况，离心压缩机适用于处理量大且波动幅度不大的情况。目前国内的压力高、口径大、流量大天然气管道增压站，通常采用国外通用电气GE和罗罗RR的离心式压缩机。
近年来为了摆脱对国外断行业的依赖，推收稿日期：2016-01-05
■2016年02期（总第256期）
动国家重大装备制造业的发展，通过对进口设备的消化、吸收，目前已有国产长输天然气管道压缩机陆续在中石油、中石化成功应用。2015年在中石化某增压站首次采用了国产离心压缩机组及配套设施，在投产试运行中对出现的问题进行了分析及解决，保障了压缩机组安全平稳运行，为后续国产压缩机用户、施工单位、制造单位提供借鉴。
问题分析及解决措施 2
该增压站设计了4套PCL355型离心式压缩机，采用电机+齿轮箱驱动方案，变频器、电机、干气
压绳机技术61 Compressa