Experimental study and modeling of weeping rate in rectangular large‐scale valve trays

Wang, Jun; Zhou, Xin; Gao, Bingying; Huang, Chunxiang; Sun, Jiarui; Sun, Xueni; Shao, Hui; Ma, Jiangquan; Leng, Yixin

doi:10.1002/aic.16722

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…When large‐scale towers are operated at low gas velocities, the weep rate of this mode is very serious, which is the main reason behind the formation of nonuniform weeping. Our previous work derived a weep rate model of the nonbubbling zone of the valve tray 12 . For sieve tray, a brief derivation was carried out (detailed information is shown in Appendix A of Supporting Information), and the result is

u_{normalw 2} goodbreak= \frac{C_{D L}}{C_{D g}} {(\frac{1}{φ} - 1)}^{1.5} {(\frac{ρ_{normalg}}{ρ_{normall}})}^{0.5} \frac{u_{normals}}{η}

where C D L and C D g are the orifice coefficients that liquid/gas flow through the sieve hole.…”

Section: Theoretical Analysis and Modelingmentioning

confidence: 99%

“…Our previous work derived a weep rate model of the nonbubbling zone of the valve tray. 12 For sieve tray, a brief derivation was carried out (detailed information is shown in Appendix A of Supporting Information), and the result is…”

Section: Dumping In the Nonbubbling Areamentioning

confidence: 99%

“…Therefore, the extension of the correlation is questionable (detailed information on this matter is provided in the following section). In our previous work, 12 we obtained a new model to calculate the weep rate of valve trays. In the model, the nonuniform bubbling phenomenon was quantified, and this variable was specifically considered in the development process of the model.…”

Section: Introductionmentioning

confidence: 99%

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Insights into the weep performance and modeling of perforated plates

et al. 2022

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Weeping is an important hydraulic parameter for the design and optimization of perforated plates because it determines the lower limit of the tray operation (vapor load). Therefore, an accurate prediction of the weep rate is very important. First, according to our theoretical analysis of the weeping phenomena of large-scale perforated trays, we proposed three weep modes on a perforated tray: (1) random weeping in the bubbling zone, (2) dumping in the nonbubbling zone, and (3) liquid fluctuation-induced weeping. Second, a weep rate model was developed, and the literature data were correlated to determine model parameters. Results showed the fractional hole area substantially affects the model parameters. We also examined the effects of the tray structure, flow parameter, and fluid physical properties on the weep rate. Finally, the developed model was used to predict the weep rate of different scale trays reported in references, and the prediction results showed good agreements.

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u_{normalw 2} goodbreak= \frac{C_{D L}}{C_{D g}} {(\frac{1}{φ} - 1)}^{1.5} {(\frac{ρ_{normalg}}{ρ_{normall}})}^{0.5} \frac{u_{normals}}{η}

where C D L and C D g are the orifice coefficients that liquid/gas flow through the sieve hole.…”

Section: Theoretical Analysis and Modelingmentioning

confidence: 99%

Section: Dumping In the Nonbubbling Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Insights into the weep performance and modeling of perforated plates

et al. 2022

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Design and hydraulic study of double‐partition dividing‐wall column

Guan,

Li,

et al. 2024

Asia-Pacific J Chem Eng

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Dividing‐wall column (DWC) provides tremendous advantages in terms of energy savings and capital costs for three‐component and even multi‐component separations. With increasing industrial application of three‐component DWCs, DWCs for separation of four‐component have received considerable research attention. The aim of this work is to investigate the design of the two‐staggered wall region and gas–liquid two‐phase flow behavior on the tray in a double‐partition DWC (DPDWC). The Aspen Plus was applied to simulate the steady state to obtain the gas–liquid‐phase flow rate in each region to serve as the basis for the tray design. In different task regions, the gas‐ and liquid‐phase flow varied in some ways. The drag models have variability for the study of fluid flow, and the Tomiyama model is more appropriate. Moreover, high‐velocity gradients and recirculating phenomenon can be discovered owing to the existence of multiple partitions in DPDWC.

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