Numerical Simulation on the Cyclone Combustion of Zhundong Coal

被引：0
|
作者：
Zhang X. [1 ]
Yang Y. [1 ]
Bai W. [1 ]
Xu H. [1 ]
机构：
[1] National Engineering Research Center of Clean Coal Combustion, Xi'an Thermal Power Research Institute Co., Ltd, Xi'an
来源：
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2019年 / 53卷 / 11期
关键词：
Cyclone combustion; Heat and mass transfer; Liquid slagging; Slag capture rate; Zhundong coal;
D O I：
10.7652/xjtuxb201911016
中图分类号：
学科分类号：
摘要：
To understand the combustion characteristics of Zhundong coal in the cyclone furnace with liquid slagging, numerical simulation of cyclone combustion process of Zhundong coal was conducted. The heat and mass transfer models were established to solve the thermophysical parameters of the slag film, and the parameters were introduced into the combustion CFD model as the boundary condition. The results show that the calculated flame temperature is consistent with the measured value of thermocouple, and the maximum error is less than 4%. The ash particles larger than 10 μm may collide with the slag film and be adhered to the slag, and the particle deposition can be simplified to a single collision. The slag film thickness is non-uniformly distributed along the cyclone furnace length, and the maximum thickness is about 2 mm. The slag film can be approximated as the flow boundary layer of Newtonian fluid. The slag temperature in the slagging outlet is higher than the temperature corresponding to the one with a viscosity of 250 Pa•s, and the liquid slagging is stable. The slag capture rate of vertical cyclone furnace is higher than 0.6, and its distribution is influenced mainly by the air supply mode. © 2019, Editorial Office of Journal of Xi'an Jiaotong University. All right reserved.
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页码：112 / 117
页数：5
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