摘要
油砂作为非常规石油资源,在能源需求不断增加和石油价格持续走高的情形下将成为重要的接替能源之一。研制了一套热碱水萃取分离装置,对中国2个地区的油砂开展了沥青的热碱水分离实验,探讨了分离过程中温度和碱的加入量、通气条件及加工助剂等因素对沥青有效分离的影响。内蒙古扎赉特旗油砂的分离实验结果表明,随着萃取热碱水温度的升高,浮选沥青回收率增加,在80℃下萃取分离实验得到的沥青总回收率达86.1%;在80℃,加入质量分数为1.6%的碱时能达到较好的沥青分离效果;通气条件有利于沥青更好地浮选分离。但对于四川盆地厚坝油砂,利用热碱水萃取分离沥青有难度,浮选沥青回收率低,其原因是厚坝油砂中沥青与矿物之间的相互作用强,破碎后产生很多细小的固体颗粒物对沥青的分离构成了障碍。因此,还应对细颗粒矿尘对沥青与矿物分离的负面影响做进一步研究;同时,减小油砂中多价阳离子对沥青分离的负面影响、改善通气条件以及在贴近工业化生产情况下的油砂沥青分离是值得进一步研究的方向。
As one of the unconventional fuel resources, tar sands are widely considered as an important supplement for growth of oil production due to the skyrocketing price of crude oil and the increasing demand of fuel resources in the world. A hot water-based bitumen extraction and separation instrument is designed and used for extracting bitumen from oil sands sampled at two locations in China. Various parameters affecting bitumen recovery such as the slurring water temperature, amount of added alkali, aeration and additives are studied in extraction experiments. Bitumen extraction from Tumuji oil sands shows that recovery increases with the rise of water temperature and the total bitumen recovery is up to 85.6% when water temperature is conditioned up to 90℃. High recovery is achievable when 1.6wt% sodium hydroxide is added in slurrying water in experiment conditions. The aeration of air gas helps the bitumen floation process. However, it's challenging to apply hot water based extraction techniques on bitumen extractions from Houba oil sand.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2011年第3期94-97,117-118,共4页
Petroleum Geology and Recovery Efficiency
基金
国家自然科学基金项目"油砂中沥青与矿物作用机理及分离过程中的制约因素研究"(40772071)
关键词
油砂
沥青
热碱水萃取
分离装置
oil sand
bitumen
hot water-based extraction
separation instrument
affecting parameter
