| 摘要: |
| 采用蜡热力学模型和水合物热力学模型,考察水合物的生成对析蜡的影响。结果表明:对于多相流体系,在较低环境温度下,水合物和蜡固相可能同时生成,一固相的生成会对另一固相的热力学以及动力学行为产生影响；从热力学方面考虑,水合物的生成将会带走体系中的轻组分,从而导致重组分的溶解度降低,且同时会使得重组分的摩尔分数增加,从而影响蜡的相平衡；水合物的生成对析蜡的影响主要取决于轻组分含量,轻组分含量越多,影响则越大。 |
| 关键词: 管道 析蜡 水合物 热力学相平衡 |
| DOI：10.3969/j.issn.1673-5005.2013.01.025 |
| 分类号::TE 832 |
| 基金项目:国家“863”计划项目(2007AA09Z301) |
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| Influence of hydrate formation on wax precipitation in subsea multiphase pipeline |
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KOU Jie1, WANG Wei2, YANG Wen1
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(1.College of Pipeline and Civil Engineering in China University of Petroleum, Qingdao 266580,China;2.CNPC Research Institute of Engineering Technology, Tianjin 300451, China)
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| Abstract: |
| Wax thermodynamic model and hydrate thermodynamic model were selected to study the influence of hydrate formation on wax precipitation. The results show that wax and hydrate may form in the subsea multi-phase pipeline at the lower environmental temperature. The formation of hydrate or wax will affect the thermodynamics and kinetics behavior of the other. On the thermodynamic side consideration, the hydrate formation will take away the light component in the system, which leads to the solubility of heavy component reduction, and makes the mole fraction of heavy component increase, and affects wax phase equilibrium. The influence of hydrate formation on wax precipitation depends on light component content, and the more the light component content, the greater the influence. |
| Key words: pipeline wax precipitation hydrate thermodynamic phase equilibrium |
