摘要
采用超声波-机械搅拌联合乳化(联合法)重油技术,根据索太尔平均直径(SMD)计算法,研究了超声功率、超声频率、乳化温度、乳化时间对乳化重油中分散相(水)分散度的影响,并比较了以上因素对超声波法与联合法乳化重油分散度影响的差别。结果表明:联合法乳化重油的分散度高于超声波法,分散相(水)的SMD降低4～8μm;超声功率、乳化温度的增加有利于分散度的提高,但乳化温度不宜超过90℃;较低的超声频率有利于水在重油中的微细化;随着乳化时间的增加,乳化重油分散度先提高后降低。本实验得出联合法乳化重油的理想工艺条件为:超声功率为500～600W,超声频率为25～40kHz,乳化温度为70～80℃,乳化时间为30min左右。
A combined emulsification technique was introduced to intensify emulsification by means of ultrasonic and mechanical stirring. Effects of ultrasonic power,ultrasonic frequency,emulsification temperature and time on the dispersity of water in heavy-oil by the combined technique or ultrasonic stirring alone were investigated on the basis of Sauter mean diameter（SMD）calculation. Results showed that the combined technique could achieve a higher dispersity of water with a 4—8 μm decrease in SMD of the disperse phase. The dispersity of water increases with the increase in ultrasonic power and emulsification temperature,while the emulsification temperature should not be higher than 90 ℃. Lower ultrasonic frequencies are favorable to the micronization of water in heavy oil. With the increase in emulsification time,the dispersity of water first increase and then decrease. As a result,the optimal experimental conditions can be considered as is 500—600 W of ultrasonic power,25—40 kHz of ultrasonic frequency,70—80 ℃ of emulsification temperature,and about 30min of emulsification time.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2010年第6期999-1003,共5页
Chemical Industry and Engineering Progress
基金
NSFC-云南省联合基金(U0937604)
云南省应用基础研究重点项目(2007E0014Z)
校企合作项目(KKK0200827092)资助
关键词
乳化重油
超声波
分散度
联合法
emulsified heavy oil
ultrasonic
dispersity
combined technique
