Simulation on Different Proportions of Coal and Natural Gas Co-combustion in a Rotary Lime Kiln

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Hongyu Gu 1,* Peng He 1 Shuxia Mei 1 Junlin Xie 1 Lixin Song 2

1. Department of Materials Science and Engineering Wuhan University of Technology, Wuhan, China

2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China

* Corresponding author.


Received: 6 Jul. 2010 / Revised: 5 Nov. 2010 / Accepted: 16 Feb. 2011 / Published: 8 Jun. 2011

Index Terms

Coal and natural gas co-combustion, rotary lime kiln, fuel proportion, numerical simulation


Co-combustion of coal and natural gas is a promising technology in the production of active lime. For this technology, proper fuel proportion of coal and natural gas (α) is one of the key parameters that requires significant thought. By means of numerical simulation, contrast studies on co-combustion with five different fuel proportions were carried out. This paper firstly puts forward the models used to describe the system based on the actual conditions. Then, numerical simulation results were analysed in detail to illustrate the co-combustion process and the velocity and temperature distribution in the kiln. Finally, comparisons of high temperature region, char conversion, length of calcining zone, CO and NOx emission and total heat transfer rate to the material bed were made in order to make a decision on fuel proportion. Synthetically considering, α=30% is a balance between benefits and costs for the rotary lime kiln studied.

Cite This Paper

Hongyu Gu, Peng He, Shuxia Mei, Junlin Xie, Lixin Song, "Simulation on Different Proportions of Coal and Natural Gas Co-combustion in a Rotary Lime Kiln", International Journal of Intelligent Systems and Applications(IJISA), vol.3, no.4, pp.17-24, 2011. DOI:10.5815/ijisa.2011.04.03


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