化工进展2016，Vol.35Issue(z2)：432-437,6.DOI:10.16085/j.issn.1000-6613.2016.s2.076
超声-冷冻解冻法处理罐底污油
Tank bottom oily sludge treatment by ultrasound-freeze/thaw
摘要
Abstract
The three-phase separation of tank bottom oily sludge (TBOS)is one of the problems for oil field production.Usually,the solvent extraction and the hot water washing have problems of security risk and secondary pollution.In this paper,after analyzing the basic characteristics of TBOS,the method of ultrasound-freeze/thaw treatment TBOS is put forward.Using the oil content in oil solid as the index,the single factor and orthogonal experiments were carried,the condition of combined process of ultrasound-freeze/thaw was studied, and the three-phase separation mechanism was discussed.The optimal condition was as follows:the ultrasonic frequency was 28kHz,temperature was 55℃,ultrasonic power was 350W,ultrasonic time is 60min,the freeze temperature is -5℃,the freezing time is 3 h and the thawing temperature is 60℃ after letting stand is 1h.The phase separation mechanism of ultrasound-freeze/thaw is probablely as follows:ultrasonic cavitation can make solid particles desorb from the surface of oil droplets and precipitate to the bottom;then,the ice crystals can pierce the oil-water interface during the freeze demulsification,the oil droplets coalescence and the oil and water separate.The research shows that the process of ultrasound-freeze/thaw is low security risk, without secondary pollution,and the separated water has low oil content.关键词
分离/脱附/界面/超声/冷冻解冻Key words
separation/desorption/interface/ultrasound/freeze/thaw分类
能源科技引用本文复制引用
张衡,黎奇谋,张林,王丽晶,方申文..超声-冷冻解冻法处理罐底污油[J].化工进展,2016,35(z2):432-437,6.基金项目
中石油股份公司重大科技专项项目(2014E-3206)。 （2014E-3206）
