Abstract
In dense-phase pneumatic conveying, the solid moisture content can significantly influence the conveying process, but there are very few studies in the open literature. In this study, the conveying experiments of two pulverized coals with various moisture contents were carried out at a 4MPa high pressure and dense-phase pneumatic conveying facility. Results show that the whole conveying system can be stably and controllably operated under the condition that moisture content below ∼8%. With the increase of moisture content up to ∼8%, the mass flow rate of 280 μm pulverized coal increases at first and then decreases, while that of 55 μm pulverized coal decreases continuously. The method of solid friction factor correlation is used to investigate pressure drop of the horizontal pipe, and non-dimensional parameters—Fr number, moisture content M and solid loading ratio µ—are investigated. The pressure drop predictions by this correlation are in good agreement with the experimental data. The solid friction factor correlations indicate that the fine coal is more sensitive to M, and µ plays a more important role for the coarse coal.
Similar content being viewed by others
References
K. Konrad, Powder Technol., 49, 1 (1986).
X. Shen and Y. Xiong, Proc. Chin. Soc. Electron. Eng., 25, 103 (2005).
G. E. Klinzing and R. D. Marcus, Rizk. Pneumatic Conveying of Solids, 2nd Ed., Chapman & Hall, London (1997).
X. Gong, X. Guo and Z. Dai, J. Chem. Ind. Eng. (China), 57, 640 (2006).
W. Namkung and M. Cho, Korean J. Chem. Eng., 19, 1066 (2002).
C. Herbreteau and R. Bouard, Powder Technol., 112, 213 (2000).
L. Sanchez, N. A. Vasquez, G. E. Klinzing and S. Dhodapkar, Powder Technol., 153, 142 (2005).
C. Liang and X. Chen, Korean J. Chem. Eng., 26, 867 (2009).
W. Pu, C. Zhao, Y. Xiong, C. Liang, X. Chen, P. Lu and C. Fan, Chem. Eng. Sci., 65, 2500 (2010).
S. Laouar and L. Molodtsof, Powder Technol., 95, 165 (1998).
D. J. Mason and A. Levy, Int. J. Multiphase Flow, 27, 415 (2001).
X. Chen, C. Fan, C. Liang, W. Pu, P. Lu and C. Zhao, Korean J. Chem. Eng., 24, 499 (2007).
M. Hirota, Y. Sogo, T. Marutani and M. Suzuki, Powder Technol., 122, 150 (2002).
D. Geldart and S. J. Ling, Powder Technol., 62, 243 (1990).
X. Guo and X. Gong, J. Chem. Ind. Eng. (China), 58, 602 (2007).
S. I. Plasynski and G. E. Klingzing. Powder Technol., 79, 95 (1994).
O. Molerus, Powder Technol., 88, 309 (1996).
A. Rautiainen and P. Sarkoma, Powder Technol., 95, 25 (1998).
M.G. Jones and K. C. Williams. Part. Sci. Technol., 21, 45 (2003).
W. Huang and X. Gong, Powder Technol., 189, 82 (2009).
C. Liang, PHD dissertation, Nanjing, Southeast University (2007).
Y. Xiong, B. Zhao and X. Shen, Proc. Chin. Soc. Electron. Eng., 24, 248 (2004).
G. E. Klinzing, N.D. Rohatgi, A. Zaltash and C. A. Myler, Powder Technol., 51, 135 (1987).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Pan, X., Chen, X., Liang, C. et al. Effect of moisture content on dense-phase conveying of pulverized coal at high pressure. Korean J. Chem. Eng. 28, 2086–2093 (2011). https://doi.org/10.1007/s11814-011-0070-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11814-011-0070-0