Study on the effect of the side secondary air velocity on the aerodynamic field in a tangentially fired furnace with HBC-SSA burner

被引：0

作者：

Zhu T. ^{[1
]}

Sun S. ^{[2
]}

Wu S. ^{[2
]}

Qin Y. ^{[2
]}

机构：

[1] Dept. of Thermal Energy Engineering, Tongji University, Shanghai

[2] School of Energy Science and Engineering, Harbin Institute of Technology, Harbin

来源：

Journal of Thermal Science | 1999年 / 8卷 / 4期

关键词：

Aerodynamic field; Bias combustion; Boiler; Numerical simulation; Pulverized coal burner;

D O I：

10.1007/s11630-999-0017-5

中图分类号：

学科分类号：

摘要：

The present paper has compared a group of furnace aerodynamic fields at different velocities of side secondary air (SSA) in a test model of 420t/h utility boiler, applying Horizontal Bias Combustion Pulverized Coal Burner with Side Secondary Air (HBC-SSA Burner). Experimental results show that, when the ram pressure ratio of side secondary air (SSA) to primary air (PA) (ρ2su252/ρ112) is between 1.0-2.4, the furnace aerodynamic field only varies slightly. The relative rotational diameters {φ/L) in the burner domain are moderate and the furnace is in good fullness. When ρ2su252/ρ1 12 is beyond 4, φ/L is so large that the stream sweeps water-cooled wall and rotates strongly in the furnace. Therefore, slagging and high temperature corrosion of tube metal will be formed on the water-cooled wall in actual operation. This investigation provides the basis for the application of this new type burner. In addition, numerical simulations are conducted, and some defects in the numerical simulation are also pointed out and analyzed in this paper.

引用

页码：277 / 283

页数：6

共 8 条

[1] Sun S., Study on combustion processes with horizontal bias combustion pulverized coal burners, Harbin Institute of Technology Doctorate Dissertation, (1995)
[2] Partanker S.V., Numerical heat transfer and fluid flow, Hemisphere, (1980)
[3] Tao W., Numerical Heat Transfer, (1988)
[4] Wang Y., Et al., Numerical Calculation of Combustion Process, (1986)
[5] Herrero J., Al E., A near wall k-ε formulation for high prandtl number heat transfer, Heat Mass Transfer, 34, 3, (1991)
[6] Zhu T., Et al., Numerical study of the effect of imaginary circle diameter and initial flow field on the aerodynamic field in a tangentially fired furnace, J. of Thermal Science, 6, 2, pp. 149-154, (1997)
[7] Hua P., Zhu T., Et al., Two new characteristic parameters of aerodynamic field in a tangentially- fired furnace, Power System Engineering, 2, pp. 32-34, (1998)
[8] Zhu T., Experimental study on the characteristic of parallel rectángular jets in the near field, Master Thesis of Harbin Institute of Technology, (1994)

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