Flow characteristics in pressurized oxy-fuel fluidized bed under hot condition

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dc.contributor.authorLi, Lin
dc.contributor.authorDuan, Yuanqiang
dc.contributor.authorDuan, Lunbo
dc.contributor.authorXu, Chuanlong
dc.contributor.authorAnthony, Edward J.
dc.date.accessioned2018-06-29T08:58:28Z
dc.date.available2018-06-29T08:58:28Z
dc.date.issued2018-06-28
dc.description.abstractPressurized oxy-fuel fluidized bed (POFB) combustion is regarded as a promising technology for carbon capture from coal-fired power plants. High pressure and temperature conditions have important impacts on the flow characteristic of fluidized bed, and understanding them will help to optimize the design and operation of the POFB boiler. In this work, experiments were carried out in two pressurized fluidized bed (PFB) devices (a hot PFB and a “visual PFB”) both operated under high temperature (20-800 °C) and high pressure conditions (0.1-1.0 MPa). Four parameters including the minimum fluidization velocity (umf), the minimum bubbling velocity (umb), bubble diameter (Db) and bubble frequency (f) were examined in this study. Results showed that the umf decreases with rising pressure and temperature. Based on our results a formula was fitted for calculating the minimum fluidization velocity in PFB, with a relative error less than 15%. With the increase of fluidization number (w), the bubble size and tail vortex increased gradually, the bubbles tended to merge, and the shape of bubbles became more irregular. The Db decreases with the increase of temperature and pressure at the same w. The f increases with increased w, while it decreased with the increase of temperature and pressure.en_UK
dc.identifier.citationLi L, Duan Y, Duan L, et al., (2018) Flow characteristics in pressurized oxy-fuel fluidized bed under hot condition. International Journal of Multiphase Flow, Volume 108, November 2018, pp. 1-10en_UK
dc.identifier.issn0301-9322
dc.identifier.urihttps://doi.org/10.1016/j.ijmultiphaseflow.2018.06.020
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/13288
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectFluidized beden_UK
dc.subjectHigh temperatureen_UK
dc.subjectHigh pressureen_UK
dc.subjectThe minimum fluidization velocityen_UK
dc.subjectBubble behaviouren_UK
dc.titleFlow characteristics in pressurized oxy-fuel fluidized bed under hot conditionen_UK
dc.typeArticleen_UK

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