Premium
Experimental study and modeling of weeping rate in rectangular large‐scale valve trays
Author(s) -
Wang Jun,
Zhou Xin,
Gao Ben,
Huang Chunxiang,
Sun Jiarui,
Sun Xueni,
Shao Hui,
Ma Jiangquan,
Leng Yixin
Publication year - 2019
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.16722
Subject(s) - weir , body orifice , tray , pressure drop , mechanics , flow coefficient , discharge coefficient , mathematics , distillation , volumetric flow rate , broyden–fletcher–goldfarb–shanno algorithm , materials science , thermodynamics , simulation , engineering , mechanical engineering , chemistry , physics , chromatography , cartography , nozzle , geography , telecommunications , asynchronous communication
Weeping is an important hydraulic parameter that needs to be considered for valve trays and for calculations in the distillation field. Therefore, the accurate prediction of weep rate is crucial for the optimal design of valve trays. First, the effects of gas and liquid loads and weir height on weep rate, tray pressure drop, and actual bubbling area were studied in a 1.5 m × 0.61 m cold simulator. Second, the weep modes on the valve tray were analyzed in detail. A theoretical model was then derived to calculate weeping. The model showed a clear relationship between the weep rate and the fractional bubbling area. The experimental data showed that the weir height substantially affected the orifice coefficient of the liquid passing through the valve. Finally, the relation between weir height and orifice coefficient was obtained by fitting the experimental data. The agreements were good, and the maximum deviations were approximately 25%.