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[1]李大全 艾慕阳 张鹏 王玉彬 苗青 刘凯.天然气水露点与含水量的换算[J].油气储运,2012,31(3):225-227.[doi:CNKI:13-1093/TE.20120116.0843.001]
　Li Daquan,Ai Muyang,Zhang Peng,et al.The conversion calculation method between water content and water dew point of natural gas[J].Oil & Gas Storage and Transportation,2012,31(3):225-227.[doi:CNKI:13-1093/TE.20120116.0843.001]
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天然气水露点与含水量的换算

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 31 期数: 2012年第3期 页码: 225-227 栏目: 出版日期: 2012-03-25
Title:
The conversion calculation method between water content and water dew point of natural gas
文章编号:
1000-8241（2012）03-0225-03
作者:
李大全1; 2 艾慕阳2 张鹏1 王玉彬2 苗青2 刘凯3
1. 西南石油大学，四川成都 610500；
2. 油气管道输送安全国家工程实验室 ? 中国石油管道科技研究中心，河北廊坊 065000；
3. 中国石油兰州输气分公司，甘肃兰州 730070
Author(s):
Li Daquan1; 2;  Ai Muyang2;  Zhang Peng1;  Wang Yubin2;  Miao Qing2;  Liu Kai3
1.Southwest Petroleum University
2. CNPC Key Laboratory of Oil & Gas Storage and Transportation, PetroChina Pipeline R & D Center
3. Lanzhou Gas Transmission Branch of PetroChina Pipeline Company
关键词:
天然气; 水露点; 含水量; 换算; PR 状态方程; 逸度系数; 相平衡
Keywords:
natural gas;  water dew point;  water content;  conversion;  PR Equation of State;  fugacity coefficient;  equilibrium
分类号:
TE832
DOI:
CNKI:13-1093/TE.20120116.0843.001
文献标志码:
A
摘要:
在天然气水露点与含水量的换算过程中，涉及天然气状态方程、气液相平衡、气体混合规则等多步计算，参数多且需要迭代求解，整个计算过程相当复杂。为此，提出了一种快速、准确的天然气水露点与含水量的换算方法：选用 PR 状态方程，并基于 GB/T 22634－2008 提供的关联关系曲线，通过相平衡理论导出计算气、液相的逸度系数公式，最后迭代求解。给出了整个换算过程的详细计算步骤，该计算方法的适用范围可扩展至 0.1 MPa ≤p ≤ 30 MPa，－ 50 ℃≤t ≤ 40 ℃。实际算例结果表明：该换算方法在压力范围为 0.1～5 MPa 内计算结果准确性较高，当压力超过 8 MPa 时，计算不确定度有待进一步分析。
Abstract:
In the conversion calculation process between the water dew point and water content of natural gas, several calculations are involved in the state equations of natural gas, gas-liquid phase equilibrium and gas mixing rules. In addition, there are many parameters are concerned and an iterative solution is required. So, the calculation is a very complex process. For these reasons, a quick and accurate calculation method for their conversion is put forward. The basic conversion process is that the PR Equation of State is used based on the incidence relation specified in GB/T 22634－2008 to calculate the fugacity coefficient about gas-liquid phase in line with the theory of phase equilibrium, and in the final, an iterative solution is used to finish the conversion calculation. Detail steps in the conversion calculation process are provided. This method is suitable for the pressure range from 0.1 MPa to 30 MPa, at -50~40 ℃ . Actual calculation case shows that calculation results will be accurate if the pressure is at 0.1~5 MPa, and when the pressure is higher than 8 MPa, the uncertainty of calculation should be further analyzed.

参考文献/References:

[1] 李长俊. 天然气管道输送[M]. 2 版. 北京：石油工业出版社，2008：54-57.
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[3] 中华人民共和国国家质量监督检验检疫总局. GB/T 22634-2008 天然气水含量与水露点之间的换算[S]. 北京：中国标准出版社，2009.
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备注/Memo

李大全，在读博士生，1980 年生，2005 年硕士毕业于西南石油大学油气储运专业，现主要从事油气管道清管仿真模拟及完
整性管理技术的研究工作。电话：13731617935；Email：ldq80@126.com（收稿日期：2011-04-02；编辑：孙伶）


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