NUMERICAL SIMULATIONS AND CORRELATIONS ON THE COAL-CONVEYING GAS FLOW IN PIPE FOR FLUIDIZED-BED COAL GASIFICATION FACILITY
Published: 1 Jun 2014
Abstract: CFD modeling and simulation are made on the key flow elements, vertical, horizontal pipes and elbow pipes, used in the pneumatic coal-transport system of fluidized-bed gasification test facility. The coal-gas flow inside the flow elements are modeled by combining Reynolds-stress Averaged Navier-Stokes equations Solver (RANS), k-εturbulence model and Discrete Phase Model (DPM) in the ANSYS Fluent code. Using the developed coal-gas flow analysis model, computations are carried out to investigate the gas flow path, the coal particle behavior and the pressure loss characteristics in flow element at various coal/gas loading ratio and coal mass flux. The present prediction results show the coal-gas flow behavior of each flow element is changed from dilute-flow to dense-flow pattern at a specific coal/gas loading ratio where pressure loss is abruptly increased. From the numerical results, the present study also provides the limiting coal/gas loading conditions to secure stable coal feeding and the correlations for pressure losses in horizontal, vertical and elbow pipes, which can be suitable for the design guidelines of actual fluidized-bed coal gasification.
Keywords: pneumatic coal-transport, coal-gas flow, dense phase flow, dilute phase flow, pressure loss, coal/gas loading ratio, correlations
Cite this article: Chan Lee, Jin Wook Lee, Gyoo Tae Kim, Tae Wan Kwon. NUMERICAL SIMULATIONS AND CORRELATIONS ON THE COAL-CONVEYING GAS FLOW IN PIPE FOR FLUIDIZED-BED COAL GASIFICATION FACILITY. Journal of International Scientific Publications: Ecology & Safety 8, 347-353 (2014). https://www.scientific-publications.net/en/article/1000106/
Download full text
Back to the contents of the volume
© 2023 The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0/
, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This permission does not cover any third party copyrighted material which may appear in the work requested.