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Oil pipeline wax deposition inhibition using chemical methods

机译:用化学方法抑制输油管道蜡沉积

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摘要

Oil pipeline wax deposition is one of the major problems facing in the crude oil transportation flow line from the offshore to onshore through pipe. The problems occur because of the crude oil fluids temperature is decrease during the transportation process and cause the solidifying process occurs. The deposited wax is normally being removed using pigging process. In the present work, chemical method is introduced as an alternative solution for the wax deposition problems in pipelines. This method used CaCl2.2H2O and NaOCl as the inhibitor. The waxes is initially drowned in the NaOCl solutions to soften the waxes and remove the water content inside the sample; waxes. While drawn the sample, the solution with the waxes is stir to get the condition flowing through the pipeline. Then with fixed molarity of the CaCl2.2H2O solution, it is added to the NaOCl solution which has being reacted with the waxes samples. After a range of period; 24 hours, the result obtained is observed and recorded. This experiment is then repeated with different volume of NaOCl, using heat to study about the heat effect and also using acid to remove the waxes. The experimental results showed that with volume of 50ml NaOCl and 0.0071 M of CaCl2.2H2O, the waxes can break into small pieces and no weight loss to the wall like using 30 ml of NaOCl solutions with 70% weight loss from the initial sample weight. While using the heat, the waxes can be removes in 120s and gets 50% efficiencies for only 30 ml volume of NaOCl. This reaction has being tested gradually to ensure its ability to remove wax from the pipeline. The removal process has being removed using the chemical reactions between CaCl2.2H2O and NaOCl. The reaction of the chemicals and waxes was done in lab scale and the progress has being look properly in schedule time to ensure it properly removed. Inhibition of waxes using chemicals method finally founds it solutions which is means by reaction between Sodium Hypochlorite with Calcium Chloride Dihidrates together with bleaching theory, the problems can be eliminated and this kind of technique is more effectual based on its capability to recycle the chemical used back and need few periods to complete each reactions.
机译:石油管道蜡的沉积是从海上到陆上通过管道的原油运输流线面临的主要问题之一。出现问题的原因在于,在运输过程中原油流体的温度降低,并导致发生固化过程。通常使用清管工艺清除沉积的蜡。在当前的工作中,引入化学方法作为解决管道中蜡沉积问题的替代方法。该方法使用CaCl2.2H2O和NaOCl作为抑制剂。最初,蜡被淹没在NaOCl溶液中,以软化蜡并去除样品中的水分。蜡。抽取样品时,将带有蜡的溶液搅拌,使条件流过管道。然后以固定摩尔浓度的CaCl2.2H2O溶液将其添加到已与蜡样品反应的NaOCl溶液中。经过一段时期; 24小时,观察并记录获得的结果。然后使用不同体积的NaOCl重复该实验,使用热量研究热效应,还使用酸去除蜡。实验结果表明,在使用50 ml NaOCl和0.0071 M CaCl2.2H2O的情况下,蜡可以破碎成小块,并且不会像壁上重量减轻那样使用30 ml NaOCl溶液,重量从初始样品重量减少了70%。使用热量时,仅30毫升的NaOCl体积即可在120秒内去除蜡,并获得50%的效率。已对该反应进行了逐步测试,以确保其从管道中去除蜡的能力。去除过程已使用CaCl2.2H2O和NaOCl之间的化学反应去除。化学物质和蜡的反应是在实验室规模下进行的,进度在计划的时间内进行得很正常,以确保将其正确除去。通过化学方法抑制蜡的最终发现是溶液,这是通过次氯酸钠与二水合氯化钙之间的反应并结合漂白理论而解决的,可以消除这些问题,并且这种技术基于其循环使用的化学物质的能力更有效。并且需要几个时间来完成每个反应。

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    Norseri Mohd Mustaffa;

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  • 年度 2010
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