Experimental study on particle circulation characteristics of external circulating fluidized bed evaporator

Yan Liu; Zemin Xu; Men Tang; Yishuo Zhang; Shaofeng Zhang

Korean Journal of Chemical Engineering, Vol.39, No.2, 241-250, February, 2022

DOI10.1007/s11814-021-0951-9 Export Citation

Experimental study on particle circulation characteristics of external circulating fluidized bed evaporator

Yan Liu^†, Zemin Xu, Men Tang, Yishuo Zhang, and Shaofeng Zhang

School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China

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In order to solve the particle circulation problem of external circulation fluidized bed evaporator, a new particle circulation device was developed, and a cold experiment device was set up for reference to the principle of gassolid circulating fluidized bed U-loop seal valve. The adjustment characteristics of the particle circulation device were studied experimentally. The effects of different flow combinations on pressure drop, particle circulation rate and particle volume fraction of heat exchange tube were investigated when the main flow and any auxiliary flow of the sealing valve were combined. It was found that when the main flow rate is constant, the pressure drop of the heat exchange tube increases with the increase of the auxiliary flow rate, and the pressure drop trend is stable when the main flow and loose flow are combined. The flow rate of particle circulation can be adjusted by adjusting the flow rate of any auxiliary flow alone, and fluidized flow has the strongest ability to regulate the particle circulation rate. The amplitude of the power spectral density of the pressure differential fluctuation signal is related to the particle circulation rate and volume fraction, so the flow state in the pipe can be studied by this method.

Keywords:Circulating Fluidized Bed;Particle Circulation Device;Seal Valve;Evaporator

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[2] Wang YP, Liu JJ, Wu CX, Zhu L, J. Chem. Ind. Eng., 57, 31 (2006)

[3] Liu MY, Wang H, Lin RT, Chem. Eng. Sci., 61(2), 802 (2006)

[4] Pronk P, Ferreira CAI, Witkamp GJ, Int. J. Heat Mass Transf., 52(15-16), 3857 (2009)

[5] Lee D, Macchi A, Grace JR, Epstein N, Chem. Eng. Sci., 56(21-22), 6031 (2001)

[6] Liang WG, Zhang SL, Power Technol., 90, 95 (1997)

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[8] Jiang F, Liu MY, Li XL, Tang XP, J. Chem. Eng. Chinese Universities, 18, 564 (2004)

[9] Liu MY, Sun BF, Res. Chem. Eng. Des., 85, 1225 (2007)

[10] Razzak SA, Int. J. Multiph. Flow, 113, 279 (2019)

[11] Palkar RR, Shilapuram V, Particuology, 31, 59 (2017)

[12] Wen JP, Jia XQ, Wang CY, Li XL, Chem. Eng. Commun., 192(7), 956 (2005)

[13] Grieco E, Marmo L, Power Technol., 161, 89 (2006)

[14] Lv SY, Jiang F, Qi PF, Chen XL, Li XL, Power Technol., 136, 375 (2020)

[15] Schmidtke H, Genthner K, Chem. Ing. Technol., 62, 840 (1990)

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[19] Wei JM, Hebei University of Technology (2007).

[20] Basu P, Butler J, Appl. Energy, 86(9), 1723 (2009)

[21] Yazdanpanah MM, Forret A, Gauthier T, Delebarre A, Power Technol., 237, 266 (2013)

[22] Li CJ, Zou Z, Li HZ, Zhu QS, Particuology, 36, 50 (2018)

[23] Basu P, Butler J, Appl. Energy, 86(9), 1723 (2009)

[24] Bareschino P, Solimene R, Chirone R, Salatino P, Power Technol., 264, 197 (2014)

[25] Bandara CJ, Jayarathna C, Thapa R, Nielsen HK, Moldestad BME, Eikeland MS, Chem. Eng. Sci., 227, 1 (2020)

[26] Wang HG, Li Y, Qiu GZ, Song GL, Yang WQ, Power Technol., 266, 249 (2014)

[27] Basu P, Cheng L, Chem. Eng. Res. Des., 78(7), 991 (2000)

[28] Chinsuwan A, Somjun J, Chem. Eng. Res. Des., 163, 58 (2020)

[29] Zhang WH, Li XG, Chem. Eng. Sci., 64(5), 1009 (2009)

[30] Chinsuwan A, Int. J. Heat Mass Transf., 177, 121 (2021)