第35卷第5期
“守，·
OIL&GAS GATHERING,TRANSPORTATION AND TREATMENT
液态乙烷管道相变工况低温特性探讨
陈俊文郭艳林鲁国文’任蓉
1.中国石油集团工程建设有限公司西南分公司，四川成都610041；
2.上海燃气工程设计研究有限公司，上海200135
摘要：液态乙烷管道因介质轻质组分含量极高，物理性质活凌，虽在稳态输送时可依据现行相关规范保证单相输送，但在特殊工况下极有可能发生相变，造成较低温度，需在管道低温设计时引起重视。基于液态乙烷管造工艺设计方法，结合液态乙烷物理性质，探讨了造成液态乙烧管道低温工况的诱因，分析并选用了适于多相分析的商用软件，模拟了某减态乙烷管道在特殊相变工况下的低温间题。研究表明：典型液态乙烷产品在绝热腾账至常压后，温度将降至一77%；常规的液相管道模报款件无法识别由于相态变化引起的低温：水击工况具有快速降压的特点，水击点下游是发生乙烧管道低温问题的主要区域；减级水击强度和造当提高运行压力是降低乙烷管道低温间题的主要手段。该研究成果可为减态乙烧管道的设计提供相关参考和借鉴。
关键词：液态乙烷；低温；管道；水击
DOI:10. 3969/ j. issn. 1006 5539. 2017. 05. 009
The Study of Low Temperature Characteristics of Liquid Ethane
Pipeline UnderPhase Change Condition Chen Junwen',Guo Yanlin',Lu Guowen',Ren Rong
1. China Petroleum Engineering & Construction Corp. Southwest Company, Chengdu, Sichuan, 610041, China
2. Shanghai Fuel Gas Design & Research Co. , Ltd, Shanghai, 200135, China
Abstract : Due to the high content of light hydrocarbon components for the liquid ethane pipeline, the physical characteristic of medium is lively- Although the single-phase transportation can be ensured under the current design standard, the phase change is likely to occur under special conditions, resulting in lower temperature. Thus, it is worth of the attention of pipeline low-temperature design. Based on the liquid ethane pipeline process design method and the physical characteristic of liquid ethane, the causes of the low temperature conditions of liquid ethane pipeline are discussed. The commercial software suitable for multiphase analysis is selected to simulate a liquid ethane pipeline low temperature problem under special phase change condition. The results show that the temperature of the typical liquid ethane products will deerease to 77 °C after adiabatic expansion to normal pressure. The conventional liquid pipeline simulation software cannot perfom the simulation for the low temperature caused by the phase change. The water hammer has the characteristics of rapid pressure depression. Downstream of the water hammer point is
收稿日期：2017-05-09
基金项目：塔里本油田天然气乙烷回收工程（S2017-112C）
作者简介：陈俊文（1987一），男，四川成都人，工程师，项士，主要从事油气田地面工程设计与研究工作
万方数据
45