摘要
减压转油线的结构设计对减压蒸馏单元的正常操作和减压拔出率的提高有很大影响。为使转油线设计更加优化,文中将前期工作中建立的描述多组分混合物的闪蒸二相流数学模型应用于转油线的结构改造,提出了一种新的转油线结构。针对某工业实例,对2种结构转油线的压降、温降和气化率模拟结果进行了对比。结果表明,减压转油线的结构改进可减小气液二相流动压降并提高转油线出口气化率。
The structure design of transfer line between the furnace and the vacuum column in the crude oil distillation unit is very important for the operation stability and the evaporation rate increase in the vacuum distillation unit. To optimize the design process, a two-phase flashing flow model, which was proposed in earlier study, was applied and a retrofitted structure of a transfer line was developed. The simulation results for pressure drops, temperature drops and evaporation rates of the two kinds of transfer lines according to a industrial instance were compared. The results show that the two-phase flow pressure drop can be decreased and the outlet evaporation rate can be improved with the retrofitted transfer line.
出处
《化学工程》
CAS
CSCD
北大核心
2010年第3期26-29,共4页
Chemical Engineering(China)
基金
国家973项目(2009CB219905)
天津市重点基金资助项目(07JCZDJC02600)
关键词
转油线
改造
减压蒸馏
模拟
二相流
transfer line
retrofit
vacuum distillation
simulation
two-phase flow
