STUDY ON TREATMENT OF OILY SLUDGE WITH IONIC LIQUID AND ORGANIC SOLVENT COMPOSITE TECHNOLOGY

Abstract

Abstract: Ionic liquid assisted extraction method was selected to recover oil from oily sludge, of Shengli Oil Field. The effects of solvent systems, solvent-oil ratio, temperature, reaction time and stirring speed were investigated. Experimental results showed that the desorption efficiency of oil and asphaltenes were 90.5 % and 83.1 %, respectively under the following conditions: using n-heptane and ionic liquid [Emin][BF4] as solvent system, the solvent-oily sludge ratio of 50/3, ionic liquid 10 mL, temperature 50℃, reaction time 20 min, stirring speed 2000 r/min. In addition, n-heptane and ionic liquid can be recycled with high recovery efficiency. The primary and secondary recovery rates of n-heptane are 89.2% and 74.2%, respectively, the recovery of ionic liquid is more than 95.4 %. The recovery rates of oil and asphaltenes are more than 85 % and 75 %, respectively. The desorption mechanism of oil from sludge was studied. It is concluded that the oil recovery from oily sludge is improved significantly by ionic liquid and solvent composite technology.

Key words: oily sludge, solvent extraction, ionic liquid, oil recovery, asphaltenes

CLC Number:

References

[1] 刘宝洪, 王通, 赵瑞玉, 等. 溶剂萃取法在含油污泥处理中的应用与研究进展[J]. 现代化工, 2013, 33 (9): 32-35.
[2] 王文祥, 韩萍芳. 油田含油污泥超声脱油的研究[J]. 环境工程学报, 2007, 1(12): 133-136.
[3] 王新强, 杨志强, 谢娟. 超声处理含油污泥除油实验研究[J].石油与天然气化工, 2006, 35(3): 239-241.
[4] 金其余, 褚晓亮, 郑晓园, 等. 超声波辅助萃取油泥回收原油的实验研究[J]. 浙江大学学报, 2012, 12 (46): 2178-2183.
[5] 赵欢, 陈元飞, 陈立宇. 超声萃取法处理含油污泥[J]. 环境工程学报, 2012, 6 (6): 2104-2108.
[6] 巫树蜂, 刘发强, 杨岳, 等. 罐底含油污泥萃取溶剂的选择与优化[J]. 环境工程学报, 2013, 7 (8): 3191-3195.
[7] 张爱华, 周德峰, 卢运良. 热萃取技术在油泥处理中的应用[J]. 石油化工安全环保技术, 2010, 26(5): 56-59.
[8] 刘晓瑜, 王文斌, 尹先清, 等. 含聚油泥处理技术及研究进展[J]. 中外能源, 2013, 18 (9): 86-91.
[9] 刘玉丽. 油田含油污泥焚烧处理技术及设备研究[J]. 石油与天然气化工, 2005, 34 (5): 426-428.
[10] Jianguo Liu, Xiumin Jiang, Lingsheng Zhou. Pyrolysis treatment of oil sludge and model-free kinetics analysis [J]. Journal of Hazardous Materials, 2009, 161: 1208-1215.
[11] 赵瑞玉, 张超, 刘宝洪, 等. 水辅助萃取法从油田含油污泥中回收原油[J]. 油田化学, 2015, 32(1): 132-136.
[12] 李慧敏, 张燕, 姚光明, 等. “热洗＋助溶剂萃取”技术处理含油污泥的应用[J]. 油气田环境保护, 2010, 20 (B10): 46-47.
[13] 程俊, 胡小虎, 姚宝军. 污泥机械深度脱水方法对比研究[J]. 中国环境管理干部学院学报, 2010, 10 (5): 47-49.
[14] 李美容, 张建, 桂召龙. 原油罐底泥的溶剂提取法处理技术[J]. 石油大学学报, 2005, 29 (1): 120-122.
[15] 赵瑞玉, 张超, 刘宝洪, 等. 水辅助萃取法从油田含油污泥中回收原油[J]. 油田化学, 2015, 32(1): 132-136.
[16] LIU Yansheng, HU Yufeng, WANG Haibo. Ionic liquids: novel solvents for petroleum asphaltenes [J]. Chinces Journal of Chemical Engineering, 2005, 13 (4):564-567.
[17] 范洪福, 张红香, 陈少鸿. 离子液体处理油田含油污水的研究[J]. 内蒙古石油化工, 2018, 13: 4-6.
[18] 范洪福, 马军. 离子液体处理含油污水实验研究[J]. 燃料化学学报, 2011, 39 (1): 33-36.
[19] Meindersma G W, Podt A, de Haan A B. Selection of ionic liquids for the extraction of aromation of aromatic hydrocarbons from aromatic/aliphatic mixtures [J]. Fuel Processing Technology, 2005, 87(1): 59-70.
[20] Mc Farlane J, Ridenor W B. Room temperature ionic liquids for separation organics from produces water [J]. Separation Science and Technology, 2005, 40(1): 1245-1265.