压力式喷嘴雾化过程气液传质性能  

Mass transfer of atomization from pressure-swirl nozzle

作　　者：胡立舜[1] 王兴军[1] 高邈[1] 于广锁[1] 王辅臣[1] 于遵宏[1] 

机构地区：[1]华东理工大学煤气化教育部重点实验室,上海200237

出　　处：《化工学报》2008年第11期2733-2740,共8页CIESC Journal

基　　金：上海"曙光"计划项目(O6SG34);新世纪人才计划项目(NCET-06-0416);长江学者及创新团队项目(IRT0620)~~

摘　　要：对压力式喷嘴雾化过程气液传质性能进行了研究,考察了CO2-H2O、C2H2-H2O、O2-H2O、CO2-paraffin系统中液体对气体的吸收速率。液体雾化压力越大,液体对气体的吸收速率越快,而液体最终浓度与液体雾化压力几乎无关。对单液滴进行受力分析,推导出了液滴运动速度与时间的关系式,并针对CO2-H2O体系计算了不同液体雾化压力下液滴速度的变化,结果表明,液滴速度衰减很快,在0.6 s内液滴趋近其终端速度。基于渗透模型推导出液滴内浓度变化方程,在不同气液体系中将模型计算值与实验结果进行对比,相对误差都在20%以内。Mass transfer of atomization from a pressure-swirl nozzle was studied.Absorption rate was investigated in CO2-H2O,C2H2-H2O,O2-H2O,CO2-paraffin systems.The results showed that higher atomization pressure resulted in higher absorption rate,but the final concentration of liquid was almost independent of atomization pressure.By analyzing the force on a single droplet,the function of droplet velocity with time was obtained,and calculation results showed that the droplet velocity had a quick decent,and dropped to its terminal velocity in 0.6 s.A mass transfer model was built on the basis of the penetration model.The modeling value was in good agreement with the experimental value,with a relative error less than 20%.

关 键 词：压力式喷嘴 雾化 传质 渗透模型 

分 类 号：TQ021.4[化学工程]