| 长输天然气管道干线放空方法选择 |
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| 引用本文： | 李龙冬,王柏盛,李小龙,郭靖.长输天然气管道干线放空方法选择[J].油气储运,2021(1):71-77. |
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| 作者姓名： | 李龙冬 王柏盛 李小龙 郭靖 |
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| 作者单位： | 国家管网集团西部管道有限责任公司 |
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| 摘 要： | 长输天然气管道在生产运行过程中由于改造或检修作业的需求,对干线管道进行放空是其服役期间的重要环节。通过对比国内外输气管道的3种放空降压方式,并经过西气东输二线、三线管网集中动火工艺处置实践的验证,总结了一种利用输气管道压缩机进行多管段连续降压后放空的阶梯式降压方法。实践证明:与传统直接放空方法或外接压缩机降压放空方法相比,阶梯式降压法能够大幅减少天然气放空损耗量和缩短放空时间,降低放空噪音对周边生产、经济活动的影响,具有高效、经济、安全、环保的特点,特别适用于长距离输气管道多管段连续集中检修作业时的降压放空操作。
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| 关 键 词： | 输气管道 放空 降压 阶梯式 |
Selection of venting method for long-distance natural gas pipeline |
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| LI Longdong,WANG Baisheng,LI Xiaolong,GUO Jing.Selection of venting method for long-distance natural gas pipeline[J].Oil & Gas Storage and Transportation,2021(1):71-77. |
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| Authors: | LI Longdong WANG Baisheng LI Xiaolong GUO Jing |
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| Institution: | (PipeChina West Pipeline Company) |
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| Abstract: | As required for the reconstruction or maintenance of long-distance gas pipeline during its operation,it is an important link to vent the main pipeline for reconstruction,maintenance and repair during its service life.Through the comparison of the 3 depressurization methods of gas pipeline home and abroad by venting,as well as the verification by the practice of centralized hot processing of Lines 2 and 3 of West-to-East Gas Pipeline Project,a venting method through continuous depressurization of multiple pipeline sections with a compressor specialized for gas pipeline was put forward.As shown in the practice,the stepwise depressurization method,compared with the traditional direct venting method and the venting method by depressurization with an external compressor,can greatly reduce the gas loss,the venting time and the effect of venting noise to surrounding production and economic activities.Additionally,the method,characterized by high-efficiency,economy,safety and environment protection,is particularly applicable to the long-distance gas pipeline with continuous and central maintenance required for multiple sections. |
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| Keywords: | gas pipeline venting pressure reduction stepwise |
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