Computational Fluid Dynamics Modelling of the Rotary Lime Kiln

EasyChair Preprint 6573

Abstract

Rotary kilns are commonly used in industry, from limestone calcination to cement production and waste incineration, among other things. For more than a century, these kilns have been used and developed. In this paper computational fluid dynamics analysis (fluent) is used to simulate and analyse the rotary lime kiln plant. Modelling the combustion characteristics of a large-scale rotary kiln using CFD proved to be a difficult job. The study of rotary lime kiln process, transfer of the heat, and mechanical response of the structure can be applied under the same condition using joint simulation analysis based on FLUENT and ANSYS finite element software, making the simulation results of rotary lime kiln more related to realistic operating conditions. The effect of fuel on the temperature and radiative conditions in the flame is studied. Several fuels like Coal and biomass, as well as other fuels including heavy fuel oil, natural gas, coal gas and corex gas were investigated. After considering many factors like flame temperature, fuel composition, calorific value, environmental consideration we have finalized corex gas as the fuel for our experiment. The calculated approximation of calorific value for Corex gas is around 2000 kcal/N cum. The major components of Corex gas by volume are around carbon monoxide (CO) – 42 %, carbon dioxide (CO₂ ) – 31 %, hydrogen (H_{2 )} -19 %, Nitrogen (N₂ ) – 2 %, methane (CH₄ ) – 1.9 %, moisture – 1 %,and dust content – less than 5 mg/N cum.

Keyphrases: ANSYS Workbench, CFD, Corex gas, Rotary kilns, finite volume method, modal analysis

@booklet{EasyChair:6573,
  author    = {Deepak Kumar and Ashok Dewangan},
  title     = {Computational Fluid Dynamics Modelling of the Rotary Lime Kiln},
  howpublished = {EasyChair Preprint 6573},
  year      = {EasyChair, 2021}}