输气管道线路截断阀爆管保护模拟
Simulation of Pipeline Rupture Prevention of Gas Pipeline Block Valve
浏览(1482) 下载(18)
- 引用格式:
-
陆美彤,罗叶新,何嘉欢.输气管道线路截断阀爆管保护模拟[J].天然气与石油,2015,33(5):0.doi:
Lu Meitong, Luo Yexin, He Jiahuan.Simulation of Pipeline Rupture Prevention of Gas Pipeline Block Valve[J].Natural Gas and Oil,2015,33(5):0.doi:
- DOI:
- 作者:
- 陆美彤1 罗叶新1 何嘉欢2
Lu Meitong, Luo Yexin, He Jiahuan
- 作者单位:
- 1.中国石油天然气管道工程有限公司，2.中国石油管道公司
1.China Petroleum Pipeline Engineering Corporation;2.PetroChina Pipeline Company
- 关键词:
- 输气；截断阀；阈值设定；保护；模拟；压降速率
Gas transmission; Block valve; Threshold setting; Protection; Simulation
- 摘要:
- 针对天然气长输管道存在的截断阀误动作及事故状态不动作的现象，结合某天然气管道项目，通过对大管径常用线路截断阀阈值设定的分析，和我国工程设计中截断阀阈值设定常用方式的介绍，阐述线路截断阀在实际应用中存在的问题，并对原因进行分析。利用TGNET工程软件对泄漏工况进行模拟，针对泄漏点位置的不同，及管线输量变化的情况，分别得到截断阀处的压降值和压降速率值，并进行比较。提出优化截断阀阈值的设定方式，说明截断阀在保障管线安全运行中的意义及对其作用存在的理解误区。得出应按照截断阀所处位置的压力值，在充分考虑变工况的情况下，合理减小截断阀阈值的结论。
Described are misoperation and inaction occurring in accident state of block valves in gas pipeline, introduced are threshold setting of block valves used commonly in large diameter gas pipeline and common methods for threshold setting of block valves in domestic engineering design, listed are some problems occurring frequently in practical application of block valves and analyzed are reasons for these problems. Applied is the engineering software TGNET to simulate the working condition of leakage, obtained and compared are pressure drop values and pressure drop rates of block valves respectively according to location of different leakage points and the change of pipeline throughput, proposed are the optimum method for threshold setting of block valves, further illustrated is the significance and effect of block valves for ensuring safe pipeline operation and it is concluded that threshold value of block valves shall be reasonably reduced according to pressure drop values at different locations and variable working conditions of block valves.
