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污染物对三甘醇脱水性和发泡性影响的研究
引用本文:金祥哲,张宁生,吴新民,陈在君. 污染物对三甘醇脱水性和发泡性影响的研究[J]. 天然气工业, 2005, 25(10): 97-98
作者姓名:金祥哲  张宁生  吴新民  陈在君
作者单位:1.西安石油大学化学化工学院;2.长庆石油勘探局工程技术研究院
摘    要:从地下开采的天然气携带有水分,在高压或冷却条件下,这些气相水分凝结为液相水分而对脱水处理装置和输气管线造成危害,必须用三甘醇脱除天然气携带的水分。文章讨论了长庆油田第一采气厂在脱水过程中遇到的三甘醇溶液受到气体水合物、气井缓蚀剂、腐蚀产物以及降解产物的污染并导致三甘醇溶液发泡、降解和脱水性能恶化的问题,在实验室研究了各种污染物对三甘醇脱水性能和发泡性能的影响。认为水是三甘醇脱水性能下降的主要原因,水浓度达到3%时必须更换三甘醇溶液;天然气中的凝析油对溶液发泡性影响最显著,减压蒸馏残液的影响次之,气井缓蚀剂的影响最小;各种污染物对三甘醇溶液泡沫的稳定性能影响较复杂并且影响程度随浓度不同有变化,浓度在0.2%以内凝析油的影响程度相对比较大而其它污染物影响相对较小,当浓度大于0.2%时,减压蒸馏残液、气井缓蚀剂的影响明显增加而凝析油影响趋于平缓。

关 键 词:天然气  三甘醇  脱水  发泡  影响  研究
收稿时间:2005-07-20
修稿时间:2005-07-20

Influence of Contaminations on Dehydration and Foaming Performance for TEG
Jin Xiangzhe,Zhang Ningsheng,Wu Xinming,Chen Zaijun. Influence of Contaminations on Dehydration and Foaming Performance for TEG[J]. Natural Gas Industry, 2005, 25(10): 97-98
Authors:Jin Xiangzhe  Zhang Ningsheng  Wu Xinming  Chen Zaijun
Affiliation:1.Chemical Engineering College of Xi’an Petroleum University; 2.Engineering Technology Institute of Changqing Petroleum Exploration Bureau
Abstract:The gaseous water carried by natural gas from underground will condense into liquid water under high pressure and cold conditions, and harm the dehydration units and the gas pipelines. So the water carried by natural gas must be removed by tri-ethylene glycol (TEG). The article discusses the problem happened in the First Gas Recovery Factory of Changqing Oil Field, i.e. TEG solution is contaminated by gas hydrates, retard corrosive agents, and products from corroding and degrading in the gas dehydration process, which makes the foaming, degrading and dehydrating performance of TEG deteriorating. The influence of different contaminations on dehydration and foaming performance of TEG is studied in the laboratory. It is thought water is the main reason to make the dehydration performance of TEG deteriorating. The TEG solution must be replaced when the water content reaches 3%. The oil condensate in natural gas influences the foaming performance of the solution mostly; the distillation residual liquid by pressure relief secondly; and the retard corrosive agent least. The influence of different contaminations on the foam stability of TEG solution is complicated, and the influence degree changes with the different concentrations. The influence degree of oil condensate is bigger than the other contaminations when the concentration is no more than 0.2%. The influence of the distillation residual liquid by pressure relief and the retard corrosive agent obviously increases, and the influence of oil condensate goes smoothly when the concentration is more than 0.2%.
Keywords:Natural gas   TEG   Dehydration   Foaming   Influence   Study
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