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Vol. 159, Issue 11, November 2013, pp. 66-73

 

Bullet

 

Numerical Simulation of Flame Temperature Field in Rotary Kiln
 
1, 2 Gongfa Li, 2 Jia Liu, 2 Hegen Xiong, 2 Jianyi Kong, 2 Zhen Gao, 2 Yikun Zhang, 2 Wentao Xiao, 2 Fuwei Cheng

1 Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources

2 College of Machinery and Automation, Wuhan University of Science and Technology, Wuhan, 430081, China

1 Tel.: 027-68862283, fax: 027-68862283

1 E-mail: ligongfa@wust.edu.cn

 

Received: 23 September 2013   /Accepted: 25 October 2013   /Published: 30 November 2013

Digital Sensors and Sensor Sysstems

 

Abstract: Rotary kiln is one of the most commonly used thermal technology equipment in metallurgical industry, its thermal stability is directly related to burn into the quality of the material, the gas temperature of inside the kiln is important influence factors of thermal system. So research the airflow temperature distribution inside the kiln, it's very vital significance to understand the status of the rotary kiln in the heated, and real-time control the calcination condition of the materiel in rotary kiln. First, this paper used Fluent Software to make a comparative analysis of several different burners, founded that the flame temperature and shape of distribution was more reasonable when take gas as fuel with cylindrical burner, then built a finite element model of the rotary kiln. Finally, using the Fluent Software to simulate the flame temperature of rotary kiln cylindrical burner and heat flow generated by it under the condition that with different inlet velocity of fuel and air, when take gas and methane as fuel, We found that the velocity of fuel inlet is greater and the temperature of flame is higher in the condition of fully burn but we cannot get the desired flame form which means abnormal combustion when the velocity of fuel inlet more than 160 m/s or less than 40 m/s in the simulation experiment, the velocity of air inlet is greater and the temperature of flame is lower, but the air inlet velocity is too large or too small can't get ideal flame form. At the same combustion condition, the flame temperature of methane combustion is relatively slightly higher, and the flame shape is more slender, but the high temperature flow generated by the two kinds of fuel is not very different. So we can substitute the methane for gas as fuel in the combustion condition is not very strict requirements. According to the combustion simulation for working conditions of the rotary kiln , realized the analysis for rotary kiln flame and the heat flow which was generated by it ,that's indicate this simulation method was feasibility and accuracy.

 

Keywords: Flame, Combustion, Rotary kiln, Temperature field, Numerical simulation, Simulation.

 

 

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