塔河原油破乳困难原因分析与对策

发布时间：2018-11-26 15:58

【摘要】：针对塔河原油电脱盐过程中破乳效果不理想的情况,对2008—2014年塔河原油的性质进行了分析。结果表明,塔河原油性质呈现逐年劣质化的变化趋势,特别是沥青质含量上升、胶质与沥青质的质量比降低、机械杂质含量增加,这些变化是导致其破乳难度加大的主要原因。通过实验研究,将烷基酚醛聚醚A助剂与聚丙烯酸聚醚主剂复配,得到油溶性破乳剂RP-04;将05-M主剂与对含铁颗粒具有润湿作用的R30助剂复配,得到水溶性破乳剂RP-05。在加工塔河原油的某炼油厂3.5 Mt/a电脱盐装置上的工业应用试验结果表明,RP-04和RP-05联合使用时具有较好的破乳效果,在试验稳定期,可以将脱后原油的盐含量从试验前的10.5mgNaCl/L降低到5~6mgNaCl/L,能够实现在高注水和高混合强度条件下的正常破乳,而没有导致电流的突然升高。
[Abstract]:In view of the unsatisfactory demulsification effect in the electric desalination of Tahe crude oil, the properties of Tahe crude oil from 2008 to 2014 are analyzed. The results show that the properties of Tahe crude oil show a trend of deterioration year by year, especially the increase of asphaltene content, the decrease of mass ratio of resin to asphaltene, and the increase of mechanical impurity content. These changes are the main reasons leading to the increasing difficulty of demulsification. Through experimental study, the oil soluble demulsifier RP-04; was obtained by blending alkyl phenolic polyether A promoter with polyacrylic acid polyether main agent. The water-soluble demulsifier RP-05. was obtained by blending 05-M main agent with R30 promoter with wetting effect on iron-bearing particles. The industrial application results of 3.5 Mt/a electric desalination unit in a refinery processing Tahe crude oil show that the combined use of RP-04 and RP-05 has a better demulsification effect, and the demulsification effect is good in the stable period of the test. The salt content of crude oil after desorption can be reduced from pre-test 10.5mgNaCl/L to 5mg NaCl-L, which can realize normal demulsification under high water injection and high mixing strength without causing sudden increase of current.
【作者单位】：中国石化石油化工科学研究院;中国石化塔河分公司;
【分类号】：TE624.1

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