回转窑中回收炉气与煤粉混合燃烧的数值模拟

doi:10.11896/cldb.23040062

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Abstract At present, the rotary kiln-electric furnace process has many problems such as high energy consumption, high waste emissions, low waste heat and energy utilization rate of industrial furnaces. Thus, the study designed a five-channels burner model for the co-combustion of furnace gas and pulverized coal in rotary kiln. The co-combustion process of the gas-solid fuel in the rotary kiln was investigated by computational fluid dynamics numerical simulation method. The temperature field, flow field, combustion characteristics and NO_x changes in the rotary kiln were analyzed under different blending ratios of gas-solid fuel. The results show that the addition of gas fuel helps to increase the combustion rate of pulverized coal and improve the temperature distribution in the kiln. Besides, the addition of gas fuel can reduce NO_x emission and make the flame more controllable, showing as a ‘wooden club shape’. With increasing the proportion of gas fuel, the high temperature zone of the rotary kiln increases gradually, and the length of the roasting zone increases from 9.16 m to 14.17 m. Moreover, the NO_x emission at the kiln exit decreases from 634 mg/m³ to 29.8 mg/m³.

Key words： rotary kiln-electric furnace (RKEF) multiphase flow co-combustion numerical simulation

Published: 25 August 2024 Online: 2024-09-10

CLC number:

TF551

Fund:Education Department of Liaoning Province (LJKMZ20220775).

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	Articles by authors
	ZHAO Nan
	LIU Peng
	WANG Lin
	LIN Shuhang
	LI Haoyang

Cite this article:

ZHAO Nan,LIU Peng,WANG Lin, et al. Numerical Simulation of Co-combustion with Recovered Furnace Gas and Pulverized Coal in a Rotary Kiln[J]. Materials Reports, 2024, 38(16): 23040062-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23040062 OR http://www.mater-rep.com/EN/Y2024/V38/I16/23040062

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