Open Access

ARTICLE

CONSIDERATION OF INFLUENCING PARAMETERS ON THE FLAME LENGTH IN PARALLEL FLOW REGENERATIVE SHAFT KILNS USING POROUS MEDIA MODEL

by

Institute of Fluid Dynamics and Thermodynamics, Otto von Guericke University Magdeburg, 39106 Magdeburg, Germany

Frontiers in Heat and Mass Transfer 2022, 19, 1-5. https://doi.org/10.5098/hmt.19.34

Abstract

Understanding the flow pattern of the gas jets in packed beds can have considerable significance in improving reactor design and process optimization. This study researches the fuel diffusion in the radial direction and the flame length in a packed bed of a Parallel Flow Regenerative (PFR) Shaft kiln. This kiln is characterized that the fuel being injected vertically into the packed bed using a lot of lances in the cross-section while the combustion air is distributed continuously. The packed bed approximated as a porous media and the measured values match approximately with those calculated with the Porous Media Model (PMM). The radial mixing of fuel and air in a packed bed is relatively bad. The flame length increases a little bit with the particle diameter. The fuel velocity has a negligible influence on the flame length for values larger than 20 m/s. The flame length decreases with increasing the excess air numbers, especially for value lower than 1.2 the flame length increases very strong.

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