固旋阀塔板的性能研究  

Performances of fixed rotary valve tray

作　　者：丁浩 田端正 沈绍传 姚克俭 

机构地区：[1]浙江工业大学化学工程学院绿色化学合成技术国家重点实验室培育基地,浙江杭州310032

出　　处：《化学工程》2017年第9期24-28,共5页Chemical Engineering(China)

基　　金：浙江省科技计划公益技术研究工业项目(2012C21019)

摘　　要：在内径为600 mm的不锈钢塔内,以空气-水-氧气为物系,对固旋阀塔板的流体力学和传质性能进行研究。测定了塔板传质效率和雾沫夹带量,并与F1浮阀塔板进行对比;通过计算流体力学软件Fluent对固旋阀塔板上气相三维流场进行了数值模拟。实验结果表明:当液相喷淋密度L=5 m^3/(m^2·h)时,随着气体负荷的逐渐增大,固旋阀塔板的传质效率从小于F1浮阀到逐渐接近F1浮阀,且在实验最大气体负荷条件下超过了F1浮阀;当液相喷淋密度较大时,固旋阀塔板的传质效率高于F1浮阀塔板,且随着气体负荷的增大,差异越来越明显;固旋阀塔板的雾沫夹带比F1浮阀塔板低50%—60%,因此具有更高的气相负荷操作上限。Fluent软件模拟结果表明,固旋阀塔板中旋转流场的存在促使液层分布更均匀,气液传质得到进一步强化。The hydrodynamic and mass transfer performances of a fixed rotary valve tray were experimentally investigated in a stainless steel column with inner diameter of 600 mm using an air-water-oxygen system. The mass transfer efficiency and entrainment of the fixed rotary valve tray were measured and compared with those of F1 floating valve tray. The 3-dimension flow field of gas phase above the fixed rotary valve tray was numerically simulated by computational fluid dynamics （CFD） software Fluent. The experimental results indicate that the mass transfer efficiencics of the fixed rotary valve tray are gradually close to those of F1 floating valve with F-factor （kinetic energy factor） increasing and surpass those of F1 floating valve at the highest F loading conditions, when the liquid spray density L is 5 m^3/（m^2·h）. The mass transfer efficieneies of the fixed rotary valve tray are higher than those of F1 floating valve tray under the higher liquid spray density conditions, and the differences are more obvious for the higher F-factors. The entrainments of the fixed rotary valve tray are significantly lower than those of F1 floating valve tray by 50% -60% , which contributes for its higher gas-phase loading upper limit. According to the results of CFD simulation, the rotating flow field on the fixed rotary valve tray prompts the distributions of the liquid layer and strengthens the gas-liquid mass transfer.

关 键 词：固旋阀塔板 F1浮阀塔板 旋转流场 雾沫夹带 塔板效率 

分 类 号：TQ053.5[化学工程]