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Pressure Drop of Liquid–Solid Two-Phase Flow in the Vertical Tube Bundle of a Cold-Model Circulating Fluidized Bed Evaporator

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Abstract

A cold-model vertical multi-tube circulating fluidized bed evaporator was designed and built to conduct a visualization study on the pressure drop of a liquid–solid two-phase flow and the corresponding particle distribution. Water and polyformaldehyde particle (POM) were used as the liquid and solid phases, respectively. The effects of operating parameters such as the amount of added particles, circulating flow rate, and particle size were systematically investigated. The results showed that the addition of the particles increased the pressure drop in the vertical tube bundle. The maximum pressure drop ratios were 18.65%, 21.15%, 18.00%, and 21.15% within the experimental range of the amount of added particles for POM1, POM2, POM3, and POM4, respectively. The pressure drop ratio basically decreased with the increase in the circulating flow rate but fluctuated with the increase in the amount of added particles and particle size. The difference in pressure drop ratio decreased with the increase in the circulating flow rate. As the amount of added particles increased, the difference in pressure drop ratio fluctuated at low circulating flow rate but basically decreased at high circulating flow rate. The pressure drop in the vertical tube bundle accounted for about 70% of the overall pressure drop in the up-flow heating chamber and was the main component of the overall pressure within the experimental range. Three-dimensional phase diagrams were established to display the variation ranges of the pressure drop and pressure drop ratio in the vertical tube bundle corresponding to the operating parameters. The research results can provide some reference for the application of the fluidized bed heat transfer technology in the industry.

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Abbreviations

\(\Delta h\) :

Height difference between the inlet and outlet of vertical tube bundle (m)

\(\Delta h_{1}\) :

Height difference between the inlet and outlet of up-flow heating chamber (m)

P 1 :

Inlet pressure of the up-flow heating chamber (kPa)

P 2 :

Inlet pressure of the vertical tube bundle (kPa)

P 3 :

Outlet pressure of the vertical tube bundle (kPa)

P 4 :

Outlet pressure of the up-flow heating chamber (kPa)

\(\Delta P\) :

Pressure drop in the vertical tube bundle (kPa)

\(\Delta P_{1}\) :

Pressure drop in the up-flow heating chamber (kPa)

\(\Delta P_{0}\) :

Pressure drop of the single liquid phase flow (kPa)

\(\Delta P_{{ 0 {\text{s}}}}\) :

Pressure drop of the liquid–solid two-phase flow (kPa)

Q :

Circulating flow rate (m3/h)

R :

Ratio of the pressure drop of vertical tube bundle to the overall pressure drop of the up-flow heating chamber (%)

S :

Pressure drop ratio (%)

S max :

Maximum pressure drop ratio of the liquid–solid two-phase flow (%)

S min :

Minimum pressure drop ratio of the liquid–solid two-phase flow (%)

\(\Delta S\) :

Difference in pressure drop ratio (%)

ε :

Amount of added particles

ρ :

Fluid density (kg/m3)

References

  1. Shen C, Cirone C, Yang LC et al (2014) Characteristics of fouling development in shell-and-tube heat exchanger: effects of velocity and installation location. Int J Heat Mass Transf 77:439–448

    Article  Google Scholar 

  2. Müller-Steinhagen H, Zhao Q (1997) Investigation of low fouling surface alloys made by ion implantation technology. Chem Eng Sci 52(19):3321–3332

    Article  Google Scholar 

  3. Pronk P, Infante Ferreira CA, Witkamp GJ (2009) Prevention of fouling and scaling in stationary and circulating liquid–solid fluidized bed heat exchangers: particle impact measurements and analysis. Int J Heat Mass Transf 52:3857–3868

    Article  MATH  Google Scholar 

  4. Qi GP, Jiang F (2015) Parametric study of particle distribution in tube bundle heat exchanger. Powder Technol 271:210–220

    Article  Google Scholar 

  5. Bi HY, Duan ML, Gu XH (2011) Study on the performance of a single tube liquid–solid circulating fluidized bed sewage heat exchanger. J Shenyang Jianzhu Univ (Natural Sci) 27(2):331–334 (in Chinese)

    Google Scholar 

  6. Jiang F, Jiang T, Qi GP et al (2019) Effect of flow directions on multiphase flow boiling heat transfer enhanced by suspending particles in a circulating evaporation system. Trans Tianjin Univ. 25(3):201–213

    Article  Google Scholar 

  7. Razzak SA, Agarwal K, Zhu JX (2008) Numerical investigation on the hydrodynamics of an LSCFB riser. Powder Technol 188:42–51

    Article  Google Scholar 

  8. Pronk P, Infante Ferreira CA, Witkamp GJ (2010) Mitigation of ice crystallization fouling in stationary and circulating liquid–solid fluidized bed heat exchangers. Int J Heat Mass Transf 53:403–411

    Article  MATH  Google Scholar 

  9. Meijer JJAM (1983) Prevention of calcium sulfate scale deposition by a fluidized bed. Desalination 47(1–3):3–15

    Article  Google Scholar 

  10. Veenman AW (1978) A review of new developments in desalination by distillation processes. Desalination 27(1):21–39

    Article  Google Scholar 

  11. Collado FJ (2018) Hydrodynamics model for the dilute zone of circulating fluidized beds. Powder Technol 328:108–113

    Article  Google Scholar 

  12. Chandel MK, Alappat BJ (2006) Pressure drop and gas bypassing in recirculating fluidized beds. Chem Eng Sci 61:1489–1499

    Article  Google Scholar 

  13. Liu HP, Li JW, Wang Q (2017) Simulation of gas–solid flow characteristics in a circulating fluidized bed based on a computational particle fluid dynamics model. Powder Technol 321:132–142

    Article  Google Scholar 

  14. Grieco E, Marmo L (2006) Predicting the pressure drop across the solids flow rate control device of a circulating fluidized bed. Powder Technol 161:89–97

    Article  Google Scholar 

  15. Grieco E, Marmo L (2008) A model for the pressure balance of a low density circulating fluidized bed. Chem Eng J 140:414–423

    Article  Google Scholar 

  16. Gungor A (2008) Predicting axial pressure profile of a CFB. Chem Eng J 140:448–456

    Article  Google Scholar 

  17. Wen JP, Zhou H, Li XL (2004) Performance of a new vapor–liquid–solid three-phase circulating fluidized bed evaporator. Chem Eng Process 43(1):49–56

    Article  Google Scholar 

  18. Wen JP, Jia XQ, Wang CY et al (2005) Heat transfer and pressure drop of vapor-liquid-solid three-phase boiling flow of binary mixtures. Chem Eng Commun 192:956–971

    Article  Google Scholar 

  19. Cho YJ, Song PS, Lee CG et al (2005) Liquid radial dispersion in liquid-solid circulating fluidized beds with viscous liquid medium. Chem Eng Commun 192:257–271

    Article  Google Scholar 

  20. Zhang SF, Shen ZY, Liu Y (2009) Experimental study on the effect of three-phase distributor on pressure drop in exterior circulating fluidized bed. J Hebei Univ Technol 38:42–45 (in Chinese)

    Google Scholar 

  21. Qi GP, Wang BB, Jiang F (2013) Pressure drop and particles distribution in the vapor–liquid–solid multi-pipe circulating fluidized bed evaporator. Chem Ind Eng 30(3):66–70 (in Chinese)

    Google Scholar 

  22. Zheng Y, Zhu JX (2000) Overall pressure balance and system stability in a liquid–solid circulating fluidized bed. Chem Eng J 79(2):145–153

    Article  Google Scholar 

  23. Hashizume K, Morita S, Nakamura Y et al (2009) Pressure drop in liquid–solid circulating fluidized beds. Heat Transf Asian Res 38(4):248–261

    Article  Google Scholar 

  24. Hashizume K, Kimura Y, Morita S (2009) Analogy between pressure drop and heat transfer in liquid–solid circulating fluidized beds. Heat Transf Asian Res 38(3):183–193

    Article  Google Scholar 

  25. Wang SD, Wang XY, Zhao K et al (2011) Flow characteristics in the high-density circulating fluidized bed risers with different cross sections. Proc Chin Soc Electr Eng 31:8–13 (in Chinese)

    Google Scholar 

  26. Khurram MS, Choi JH, Won YS et al (2016) Relationship between solid flow rate and pressure drop in the riser of a pressurized circulating fluidized bed. J Chem Eng Jpn 49:595–601

    Article  Google Scholar 

  27. Zhang H, Wang JG, Zhang SF (2008) Experimental study of fouling preventing in a horizontal liquid–solid circulating fluidized bed heat exchanger. Chem Equip Technol 29:31–33 (in Chinese)

    Google Scholar 

  28. Liu Y, Zhang SF, Zhang W (2012) Study on particles distribution characteristics through a circulation fluidized bed with the spiral flow generator. Energy Procedia 14:1111–1116

    Article  Google Scholar 

  29. Jiang F, Bian YW, Qi GP et al (2016) Study on the particle distribution of a horizontal multi-tube circulating fluidized bed. Powder Technol 295:272–283

    Article  Google Scholar 

  30. Jiang F, Zhao PL, Qi GP et al (2018) Pressure drop in horizontal multi-tube liquid–solid circulating fluidized bed. Powder Technol 333:60–70

    Article  Google Scholar 

  31. Jiang F, Zhao PL, Qi GP et al (2019) Flow characteristics in a horizontal liquid–solid circulating fluidized bed. Powder Technol 342:24–35

    Article  Google Scholar 

  32. Monji H, Matsui G, Saito T (1995) Pressure drop reduction of liquid-particles two-phase flow with nearly equal density. Multiph Flow 7(2):355–365

    Google Scholar 

  33. Liu Y, Li HB, Wang JG et al (2013) Study on pressure drop of liquid–solid two-phase fluidized bed heat exchanger with Kenics static mixer. Chem Ind Eng Prog 11:2579–2582 (in Chinese)

    Google Scholar 

  34. Qi GP, Jiang F (2015) Numerical investigation on prevention of fouling in the horizontal tube heat exchanger: particle distribution and pressure drop. Desalination 367:112–125

    Article  Google Scholar 

Download references

Acknowledgements

This work was supported by the open foundation of State Key Laboratory of Chemical Engineering (SKL-ChE-18B03) and the Municipal Science and Technology Commission of Tianjin (No. 2009ZCKFGX01900).

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Authors and Affiliations

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China

    Feng Jiang, Siyao Lv, Xiaoling Chen & Xiulun Li

  2. School of Biological and Environmental Engineering, Tianjin Vocational Institute, Tianjin, 300410, China

    Guopeng Qi

Authors
  1. Feng Jiang
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  2. Siyao Lv
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  3. Guopeng Qi
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  4. Xiaoling Chen
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  5. Xiulun Li
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Correspondence to Feng Jiang.

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Jiang, F., Lv, S., Qi, G. et al. Pressure Drop of Liquid–Solid Two-Phase Flow in the Vertical Tube Bundle of a Cold-Model Circulating Fluidized Bed Evaporator. Trans. Tianjin Univ. 25, 618–630 (2019). https://doi.org/10.1007/s12209-019-00212-z

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  • DOI: https://doi.org/10.1007/s12209-019-00212-z

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