[1]姜进田,高斌.中乌天然气管道A 线绕行段天然气置换投产[J].油气储运,,30():614-618.[doi:10.6047/j.issn.1000-8241.2011.08.004]
Jiang Jintian and Gao Bin.placement commissioning of the A-line modified section of China-Uzbekistan Gas Pipeline[J].Oil & Gas Storage and Transportation,,30():614-618.[doi:10.6047/j.issn.1000-8241.2011.08.004]
中乌天然气管道A 线绕行段天然气置换投产
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[摘要]中乌天然气管道A 线绕行段置换投产需最大程度地将临时段管道中的天然气导入A 线绕行段管道。对置换和平压过程进行工艺计算和数据模拟，确定投产初始压力为0.2 MPa，天然气置换流速为5 m/s，管内天然气节流前的温度约12 ℃，节流后的温度将降至约－31 ℃。根据实际置换速率的计算结果、阀后压力的变化以及管道、设备的振动情况，调整手轮总转数以控制流量。通过分析约束条件、上下游允许的最大停输时间、平压作业的最佳时机，论证了将临时段内的天然气导入绕行段的可行性。通过对不同置换方式的工程实施方案进行比选，解决了高压天然气置换过程中高压差节流、置换速率控制的难题，实现了临时停输情况下临时段管道向绕行段管道导入天然气并最终平压的置换投产。
[中图分类号]TE821[文献标志码]
A [doi]A
[Abstract]The gas in the temporary section of China-Uzbekistan Gas Pipeline will be furthest imported to the A-line modified section inthe process of displacement commissioning. Through the process calculation and data simulation of displacement and pressurebalancing，several parameters have been determined，for example，the initial pressure of commissioning is 0.2 MPa，and gasflow rate of displacement is at 5 m/s，gas temperature in the pipeline before throttling is approximately at 12℃. And so，thetemperature should drop to －31 ℃ after throttling. Based on the actual calculations result of displacement rate and the pressurechanges of valve back，and the vibration situation of pipeline and equipment，the flowrate has been controlled by adjusting the total revolutions number of hand wheel. The feasibility of importing gas from the temporary section to the modified section has been demonstrated by analyzing various constraints and limitations，maximum allowable shutdown time for upstream anddownstream pipeline，the optimum timing of pressure balancing etc.. Problems in displacement rate control and throttling for ?high-pressure gas pipeline have been solved by comparing the scheme of displacement commissioning. And the displacement commissioning process of importing gas and pressure balancing from the temporary section to the modified section have beenachieved under the condition of temporary shutdown.
A 线绕行段是改变原有中乌天然气管道设计线路向西绕行至乌兹别克斯坦加兹里气田区的一项关键性工程，如果不采取非常措施，按期实现中乌天然气管道A 线单线投产通气难度极大。为此，采用了通过临时段管道连通A 线管道先实现投产，待A 线绕行段具备投产条件后，再将其与A 线管道连通，最终实现A 线管道投产、临时段管道停用的总体方案。
【参考文献】
[1] 杨筱蘅. 油气管道安全工程[1] [M]. 北京：中国石化出版社，2005：174-175，178.
[2]国家经济贸易委员会. SY/T5922－2003 天然气管道运行规范[S]. 北京：石油工业出版社，2003.
[3]李长俊. 天然气管道输送[M]. 北京：石油工业出版社，2000：86-87，90-93，176-181.