摘要
利用自主设计的双进料喷嘴,对浓硫酸与异丁烷的混合过程进行了数值模拟研究。采用混合特性、均布特性及能耗三个评价指标,对三种不同结构喷嘴的性能进行详细考察:结构1(90SX)为进料高度不同,夹角为90°;结构2(180DG)为进料高度相同,夹角为180°;结构3(180SX)为进料高度不同,夹角为180°。结果表明:具有进料不同高度、夹角为180°结构的喷嘴混合效果最好。通过对喷嘴内部流体进行详细模拟,发现浓硫酸与异丁烷在喷嘴内部存在一个有效混合区,该混合区位于异丁烷入口附近;在喷嘴出口附近由于离心力的作用,导致浓硫酸与异丁烷发生分层,这些结果为喷嘴结构的优化提供了参考。
The numerical simulation of process of mixing sulfuric acid with isobutane was performed with self-designed double-feed nozzle, and the performances of 3 types of nozzles of different constructions were in- vestigated by mixing characteristics,uniform features and pressure drop. Construction 1 （90SX） has different feed inlet elevations and angle is angle is 900 ; Construction 2 （180AG） has the same feed inlet elevations and angle is 1800; and Construction 3 （180SX） has different feed inlet elevations and angle is angle is 1800. The results show that the nozzles of different feed inlet elevations and 1800 angle offer the best mixing. The detailed simulation of fluid inside the nozzles has found that there is an effective mixing zone inside the nozzle for the concentrated sulfuric acid and isohutanes, which is near to the inlet of isobutanes. Under the effect of centrifu- gal force near the nozzle outlet, the concentrated sulfuric acid is separated from isobutanes in layers. All these have provided good information for the optimization of construction of nozzles.
出处
《炼油技术与工程》
CAS
2016年第10期32-35,共4页
Petroleum Refinery Engineering
关键词
烷基化
硫酸
喷嘴
数值模拟
alkylation, sulfuric acid, nozzle, numerical simulation
