输气站场RMG 分输调压装置性能提升改造及应用

中国石油西气东输管道公司

分输站;监控调压阀;远程控制;热备用;反向压差

Performance improvement, renovation and application of RMG offtake and regulating device in gas transmission station
ZHONG Lijun, LYU Bopeng, LIU Faping, ZHU Jinhui, XIA Qingchun, HU Tianming,OUYANG Zhimin, LEI An

PetroChina West East Gas Pipeline Company

offtake station, monitoring regulator, remote control, hot standby, reverse differential pressure

备注

RMG512 自力式监控调压阀作为关键分输设备广泛应用于中国输气管道分输站场。随着站场“集中监视”生产管理模式的推广,调控中心对分输设备的远程控制提出了更高要求,分输调压橇必须实现“一用一热备”。监控调压阀主阀皮膜不能承受反向压差,导致调压橇热备用模式易造成皮膜损坏。通过分析监控调压阀的工作原理,结合现场运行经验,提出了RMG 调压装置性能提升改造方案:在工作调压阀下游增加一根具有单向导通功能的引压管,连接到监控调压阀上游,可以实现监控调压阀上游压力随下游分输压力的升高而升高,且不影响调压橇的正常工作。改造方案有效减少了备用路设备的运行耗损,延长了监控调压阀皮膜的使用寿命,对原RMG 调压装置的工作原理不会造成影响。经过现场试验应用,无安全隐患,改造成本低,经济效益可观。(图3表1,参[21]

RMG512 self-operated monitoring regulator, a key offtake device, has been widely used in China’s gas transmission pipeline offtake stations. With the promotion of “centralized monitoring” production management mode in stations, higher requirements have been proposed by the control center for remote control of offtake device, so as to ensure the “one run, one hot standby” of offtake and regulating skids. The diaphragm in the main valve of the monitoring regulator should not be subject to reverse differential pressure, which is easy to cause diaphragm damage in the hot standby mode of the pressure regulating skid. Analyzing the working principle of monitoring regulator, in combination with field operation experience, the scheme was proposed for the performance improvement and renovation of RMG regulating device: an impulse line with one-way continuity function can be introduced downstream of the operating regulator, and connected to the upstream of the monitoring regulator. In this way, it becomes possible to monitor the upstream pressure rise of the regulator with the downstream offtake pressure rise, without affecting the normal operation of the pressure regulating skid. The renovation scheme effectively reduce the operation loss of standby equipment, increase the service life of diaphragm, and has no effect on the working principle of monitoring regulator. Field test and application has demonstrated its nonpotential safety hazard, low renovation cost and considerable economic benefits. (3 Figures, 1 Table, 21 References)