The weeping characteristic of submerged multi-orifice plate

doi:10.1016/j.cjche.2019.12.024

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (4): 955-968.DOI: 10.1016/j.cjche.2019.12.024

• Fluid Dynamics and Transport Phenomena • Previous Articles Next Articles

The weeping characteristic of submerged multi-orifice plate

Jiming Wen, Ruifeng Tian, Sichao Tan, Qiunan Sun, Haifeng Gu

Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, China

Received:2019-05-07 Revised:2019-08-18 Online:2020-07-27 Published:2020-04-28
Contact: Haifeng Gu
Supported by:
The authors are profoundly grateful to the Fundamental Research Funds for the Central Universities (HEUCFP201855).

The weeping characteristic of submerged multi-orifice plate

Jiming Wen, Ruifeng Tian, Sichao Tan, Qiunan Sun, Haifeng Gu

Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, China

通讯作者: Haifeng Gu
基金资助:
The authors are profoundly grateful to the Fundamental Research Funds for the Central Universities (HEUCFP201855).

Abstract

Abstract: Weeping is an adverse phenomenon which results in higher pressure drop and poorer aeration performance. Visual experiments have been conducted to study the mechanism by which weeping impairs the work performance of multi-orifice plate. A theoretical model is improved to analyze the weeping phenomenon of multiorifice plate based on potential flow theory. The relations of different bubbling conditions and weeping rate are analyzed. Weeping condition and average weeping rate have relation with the driven pressure differential and dynamic variation of gas chamber pressure. In addition, a set of experiments are designed to study the influence of various factors on weeping rate. The bubble coalescence during bubble formation is a fatal factor determining weeping rate, so the relation between weeping rate and gas flow rate is concerned with the pitch of orifices and orifice diameter. There is a critical plate thickness which is in favor of weeping.

Key words: Weeping, Multi-orifice plate, Wave pressure, Gas chamber pressure

摘要： Weeping is an adverse phenomenon which results in higher pressure drop and poorer aeration performance. Visual experiments have been conducted to study the mechanism by which weeping impairs the work performance of multi-orifice plate. A theoretical model is improved to analyze the weeping phenomenon of multiorifice plate based on potential flow theory. The relations of different bubbling conditions and weeping rate are analyzed. Weeping condition and average weeping rate have relation with the driven pressure differential and dynamic variation of gas chamber pressure. In addition, a set of experiments are designed to study the influence of various factors on weeping rate. The bubble coalescence during bubble formation is a fatal factor determining weeping rate, so the relation between weeping rate and gas flow rate is concerned with the pitch of orifices and orifice diameter. There is a critical plate thickness which is in favor of weeping.

关键词: Weeping, Multi-orifice plate, Wave pressure, Gas chamber pressure

Jiming Wen, Ruifeng Tian, Sichao Tan, Qiunan Sun, Haifeng Gu. The weeping characteristic of submerged multi-orifice plate[J]. Chinese Journal of Chemical Engineering, 2020, 28(4): 955-968.

Jiming Wen, Ruifeng Tian, Sichao Tan, Qiunan Sun, Haifeng Gu. The weeping characteristic of submerged multi-orifice plate[J]. 中国化学工程学报, 2020, 28(4): 955-968.

References

[1] M.C. Ruzicka, et al., Effect of surfactant on homogeneous regime stability in bubble column, Chem. Eng. Sci. 63(4) (2008) 951-967.
[2] Y. Akagi, et al., Liquid weeping accompanied by bubble formation at submerged orifices, Ind. Eng. Chem. Res. 26(8) (1987) 1546-1550.
[3] W.L. Peng, A. Guoqiang Yang, L.S. Fan, Experimental studies of liquid weeping and bubbling phenomena at submerged orifices, Ind.eng.chem.res 41(6) (2002) 1666-1677.
[4] W. Zhang, R.B.H. Tan, A model for bubble formation and weeping at a submerged orifice, Chem. Eng. Sci. 55(24) (2000) 6243-6250.
[5] W. Zhang, R.B.H. Tan, Bubble emission frequency and weeping rate at a submerged orifice with bulk liquid flow, Can. J. Chem. Eng. 81(3-4) (2003) 465-469.
[6] D.F. Che, J.J.J. Chen, Bubble formation and liquid weeping at an orifice submerged in a liquid, Chemie Ingenieur Technik-CIT 62(11) (2010) 947-949.
[7] T. Miyahara, M. Iwata, T. Takahashi, Bubble formation pattern with weeping at a submerged orifice, Journal of Chemical Engineering of Japan 17(6) (2006) 592-597.
[8] P. Iliadis, V. Douptsoglou, M. Stamatoudis, Effect of orifice submergence on bubble formation, Chemical Engineering & Technology 23(4) (2015) 341-345.
[9] M.I. Hossain, et al., Study of liquid weeping at a tapered orifice in a bubble column reactor by a computer-aided image analysis algorithm, Ind. Eng. Chem. Res. 49(8) (2010) 3840-3848.
[10] M.I. Hossain, et al., Effect of orifice surface roughness on the liquid weeping in bubble columns, Ind. Eng. Chem. Res. 50(1) (2011) 389-397.
[11] D.J. Mccann, R.G.H. Prince, Bubble formation and weeping at a submerged orifice, Chem. Eng. Sci. 24(5) (1970) 801-814.
[12] A. Kupferberg, G.J. Jameson, Pressure fluctuations in a bubbling system with special reference to sieve plates, Trans. Inst. Chem. Eng. 48(1970) 140-150.
[13] C. Truesdell, Bernoulli's theorem for viscous compressible fluids, Phys. Rev. 77(4) (1950) 535-536.
[14] L. Zhang, M. Shoji, Aperiodic bubble formation from a submerged orifice, Chem. Eng. Sci. 56(18) (2001) 5371-5381.
[15] L.M. Milne-Thomson, Theoretical Hydrodynamics, 4th edition, MacMillian Co., New York, 1960.
[16] H. Schlichting, K. Gersten, Boundary-Layer Theory, McGraw-Hill, 1979.
[17] J. Wen, et al., The effect of multi-orifice plate configuration on bubble detachment volume, Chin. J. Chem. Eng. 27(1) (2019) 72-84.
[18] J.M. Wen, Q.N. Sun, Z.N. Sun, H.F. Gu, Bubble coalescence efficiency near multi-orifice plate, Chin. J. Chem. Eng. 27(8) (2019) 1765-1776.
[19] M. Martín, et al., Chem. Eng. Process. Process Intensif. 47(9-10) (2008) 1799-1809.
[20] W.B. Hayes, B.W. Hardy, C.D. Holland, Formation of gas bubbles at submerged orifices, AIChE J. 5(3) (1959) 319-324.

The weeping characteristic of submerged multi-orifice plate

The weeping characteristic of submerged multi-orifice plate

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 6

Recommended Articles

Metrics

Comments

[1]	M. Ajdar, A. Azdarpour, A. Mansourizadeh, B. Honarvar. Improvement of porous polyvinylidene fluoride-co-hexafluropropylene hollow fiber membranes for sweeping gas membrane distillation of ethylene glycol solution [J]. Chinese Journal of Chemical Engineering, 2020, 28(12): 3002-3010.
[2]	Jiming Wen, Qiunan Sun, Zhongning Sun, Haifeng Gu. Bubble coalescence efficiency near multi-orifice plate [J]. Chinese Journal of Chemical Engineering, 2019, 27(8): 1765-1776.
[3]	Jiajun Song, Dongyan Han, Qinqin Xu, Dan Zhou, Jianzhong Yin. Heat transfer model of two-phase flow across tube bundle in submerged combustion vaporizer [J]. Chin.J.Chem.Eng., 2019, 27(3): 613-619.
[4]	Jiming Wen, Qiunan Sun, Zhongning Sun, Haifeng Gu. The effect of multi-orifice plate configuration on bubble detachment volume [J]. Chin.J.Chem.Eng., 2019, 27(1): 72-84.
[5]	ZENG Aiwu. The Mal-distribution of Weeping from a Distillation Tray and Its Effect on Tray Efficiency [J]. , 2002, 10(5): 508-516.
[6]	Li Yuan, Zhao Pei, Liu Ji, Zhang Jiexu, Lu Xiulin. Directed Valve Trays [J]. , 1998, 6(1): 91-94.