摘要
采用空气-水-氧气物系,在内径为Φ600 mm,塔板间距为350 mm的冷模精馏塔内,分别研究了带有14个浮阀的FGS-VT-14塔板和带有8个浮阀的FGS-VT-8塔板的流体力学与传质性能。根据实验数据,回归得到了FGS-VT-14塔板的干板压降和湿板压降关联式分别为Δp d=ξu2hρg/2和Δp w=a1Fn h Lm w。实验结果表明,与FGS-VT-8相比,FGS-VT-14的干板压降降低3%、湿板压降降低16%(浮阀升起后)、漏液降低90%、雾沫夹带升高55%、塔板效率增大12%,具有更好的综合性能;与导向筛板相比,FGS-VT-14塔板的操作性提高了10%～20%、塔板效率提高了7%、湿板压降降低了8%(浮阀升起后)。
The performance of two types of flow-guided sieve tray with 14 and 8 valves （ FGS-VT-14 and FGS-VT- 8, respectively） has been studied in an air-water-oxygen system within a 600 mm diameter plexiglass column with a 350 mm tray spacing. The regression models of the dry-plate pressure drop （ Apd 2 = uhps/2） and wet-plate pres- sure drop （ Ap. = aI FL＇. ） of FGS -VT-14 were obtained from the experimental data. The results indicated that the performance of FGS- VT-14 was better than FGS- VT-8 because its dry-plate pressure drop, wet-plate pressure drop （ when the valves start to open） and weeping were reduced by 3% , 16% and 90% , respectively, and the tray efficiency was improved by 12% , although the entrainment increased by 55%. Compared with conventional flow- guided sieve trays, the operating flexibilities of the two FGS-VT units were improved by 10% - 20%, and the tray efficiency increased by about 7%. On increasing the gas velocity, the pressure drop decreased by about 8%.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第5期1-6,共6页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
国家"863"计划(2008AA062401)
中央高校教育基金(JL1101)
关键词
导向筛板-导向浮阀
流体力学
效率
压降关联式
flow-guided sieve-valve tray
hydrodynamics
tray efficiency
pressure drop regression model
