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起伏湿气管道持液率分布规律及临界倾角模型

发布时间:2019-06-20 05:15
【摘要】:起伏湿气管道在实际运行过程中,管道低洼处和上坡段容易形成积液,从而造成管输效率降低、管道压降增大、水合物生成、形成段塞流以及管道内腐蚀加剧等一系列问题,为此,对地形起伏湿天然气管道的积液规律进行分析。以某集气站集输管道为例,探究了地形起伏湿天然气管道沿线的液体分布情况,针对管内气体流速、管道倾角等因素对管道持液率的影响进行敏感性分析,得到该起伏湿气管道的积液规律以及某流量工况下管道不出现积液现象的临界管道倾角,并基于此建立了气体流速、管道倾角以及持液率之间的预测数学模型,将模型计算结果与软件模拟结果进行了对比分析,验证了预测模型的准确性。预测模型为湿气管道实际运行过程中的积液控制与安全运行提供了理论依据。
[Abstract]:In the actual operation process of undulating wet gas pipeline, it is easy to form liquid accumulation in the low-lying and uphill sections of the pipeline, resulting in a series of problems, such as the decrease of pipeline transportation efficiency, the increase of pipeline pressure drop, the formation of hydrate, the formation of slug flow and the aggravation of corrosion in the pipeline. Therefore, the liquid accumulation law of topographic undulating wet natural gas pipeline is analyzed. Taking the gathering pipeline of a gas gathering station as an example, this paper probes into the liquid distribution along the wet natural gas pipeline with undulating terrain, analyzes the influence of the gas velocity and the inclination angle of the pipeline on the liquid holding rate of the pipeline, obtains the liquid accumulation law of the undulating wet gas pipeline and the critical pipeline inclination angle of the pipeline without liquid accumulation under a certain flow condition, and establishes the gas velocity. The prediction mathematical model between pipeline inclination angle and liquid holding rate is compared with the software simulation results, and the accuracy of the prediction model is verified. The prediction model provides a theoretical basis for the liquid accumulation control and safe operation of moisture pipeline in the actual operation process.
【作者单位】: 中国石化销售有限公司北京石油分公司;中国石油大学(华东)储运与建筑工程学院/山东省油气储运安全重点实验室;中国石油塔里木油田公司油气运销部;
【基金】:国家自然科学基金资助项目“立管内气液两相流动与海洋环境共同诱发立管振动耦合研究”,51404290
【分类号】:TE832


本文编号:2502966

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