伴生气的配方溶液法脱硫脱碳工艺研究

发布时间：2018-05-17 23:01

  本文选题：伴生气 + 砜胺溶液　； 参考：《西南石油大学》2015年硕士论文

【摘要】：天然气作为一种清洁、高效、方便的非再生优质能源,目前已广泛应用于各个领域。而伴生气作为天然气的一种,其开发和利用也受到越来越多的重视。来自地下的伴生气中通常含有一定量的硫化物和二氧化碳,需要经过脱硫脱碳净化处理后才能加工利用。因此,伴生气脱硫脱碳技术的研究对油气生产开发、天然气高效利用具有重要意义。 本论文针对国外某能源公司采油厂含H2S、CO2以及有机硫的伴生气进行脱硫脱碳净化技术研究,因净化后的伴生气拟用作LNG生产的原料气,对净化要求特别苛刻,现有的脱硫脱碳技术难以直接采用。论文对目前现有的天然气脱硫脱碳方法及工艺进行分析对比,结合该采油厂伴生气的气质特点,选择物理化学吸收法作为该伴生气的基本脱硫脱碳工艺方案。然后对其方案中涉及的溶液配方、增压方案、重烃溶解等工艺问题进行了分析和研究,最终设计了该伴生气的脱硫脱碳净化工艺流程,满足下游LNG生产气质的需要。 论文中对比分析了7种配方溶液的脱硫和脱碳效果,最终确定脱硫脱碳配方溶液为砜胺Ⅱ型溶液(Sulfinol-D),并确定了合适的溶液配比为环丁砜：DIPA: H2O=45%:40%:15%(质量比)。根据该溶液配方,重点分析和讨论了影响脱硫脱碳过程的主要工艺参数,获得了合理的关键工艺参数：伴生气入塔温度为30℃,吸收压力为3.0MPa,气液比300,再生温度131℃,富液换热后入再生塔温度为850C,贫液入吸收塔温度为40℃,吸收塔塔板数20块。对于原料气增压方案,主要以满足合适的吸收压力为目的,最终确定带中间冷却的两级增压方案。因伴生气重烃含量高,存在配方溶液中重烃溶解量大的问题,论文提出了以三相分离器代替传统两相闪蒸罐的设备方案,将溶解在配方溶液中的重烃分离出来,并确定了三相分离器闪蒸压力为600kPa。另外,论文采用液力透平技术对溶液的压力能进行回收,回收的能量为16.52kW。最后对关键设备进行了初步选型。
[Abstract]:As a clean, efficient and convenient non-renewable energy source, natural gas has been widely used in various fields. As a kind of natural gas, the development and utilization of associated gas has been paid more and more attention. The associated gas from underground usually contains a certain amount of sulphide and carbon dioxide, which needs desulfurization and decarbonization treatment before it can be processed and utilized. Therefore, the research of associated gas desulfurization and decarbonization technology is of great significance to oil and gas production and gas utilization. In this paper, the desulfurization and decarbonization technology for the associated gas containing H _ 2S CO _ 2 and organic sulfur in a foreign energy company is studied. Because the purified associated gas is intended to be used as raw material gas produced by LNG, the purification requirements are particularly harsh. The existing desulphurization and decarbonization technology is difficult to be adopted directly. In this paper, the existing natural gas desulfurization and decarburization methods and processes are analyzed and compared. Combined with the temperament characteristics of the associated gas in the oil production plant, physicochemical absorption method is selected as the basic desulfurization and decarbonization process of the associated gas. Then the solution formula, pressurization scheme and heavy hydrocarbon dissolution process involved in the scheme were analyzed and studied. Finally, the desulphurization and decarburization purification process of the associated gas was designed to meet the needs of downstream LNG production temperament. In this paper, the desulfurization and decarbonization effects of seven formulations are compared and analyzed. Finally, it is determined that the desulphurization and decarbonization formula solution is Sulfinol-Dane type 鈪，

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