Numerical Simulation of Pulveri-ed Coal Combustion in Staged Air Coupling with Multi-Hole Wall Air

doi:10.7652/xjtuxb202010017

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Numerical Simulation of Pulveri-ed Coal Combustion in Staged Air Coupling with Multi-Hole Wall Air

更新时间：2025-07-09

- Numerical Simulation of Pulveri-ed Coal Combustion in Staged Air Coupling with Multi-Hole Wall Air
- Vol. 54, Issue 10, Pages: 137-143(2020)
- 作者机构：
  
  太原理工大学热能工程系,太原,310024
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202010017
  CLC： TK223.2
- Online First：10 October 2020，
  
  Published：2020
- 稿件说明：
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Numerical Simulation of Pulveri-ed Coal Combustion in Staged Air Coupling with Multi-Hole Wall Air[J]. 2020, 54(10): 137-143.
DOI：

Numerical Simulation of Pulveri-ed Coal Combustion in Staged Air Coupling with Multi-Hole Wall Air[J]. 2020, 54(10): 137-143. DOI： 10.7652/xjtuxb202010017.

摘要

为阐明多孔壁风耦合空气分级对煤粉燃烧的作用特性

利用商业软件Ansys Fluent进行了数值模拟研究

并采用用户自定义函数法(UDF)编译写入了焦炭气化反应和NO被焦炭异相还原的宏文件。探究了燃烧炉中流场、温度场和主要组分浓度场的分布规律

分析了多孔壁风对NO

排放和燃烧效率的影响。结果表明:多孔壁风系数存在优化值

此时不会明显影响炉内的燃烧组织; 多孔壁风可在主燃区和还原区壁面形成空气膜

其中

主燃区空气膜中氧气体积分数大于4%

还原区不低于2%

阻止了还原性气体的腐蚀; 多孔壁带入还原区的氧气能够与焦炭结合

在焦炭表面生成含氧络合物C(O)

既能强化NO的异相还原

又能促进焦炭在燃尽区燃烧。

Abstract

Numerical simulation using Ansys Fluent software is performed to clarify the combustion characteristics of pulveri-ed coal in staged air coupling with multi-hole wall air

and a user defined function method(UDF)is used to compile and write macro documents of char gasification reaction and NO dissimilar reduction by char. The distributions of flow field

temperature field and concentration field of major species are investigated

and the influence of multi-hole wall air on NO

emission and combustion efficiency is analy-ed. Calculating results show that: there exits an optimal multi-hole wall air ratio

and in this case the combustion is not affected adversely; an air film is formed near the wall

and the oxygen concentrations in the primary and reduction -ones are abov

e 4% and 2%

respectively

thus the corrosion due to the reducing species is prevented; the complex C(O)is produced on the char surface in the reduction -one

which enhances the reduction of NO and promotes the

关键词

Keywords

references

RIBEIRETE A, COSTA M. Detailed measurement in a pulverized-coal-fired large-scale laboratory furnace with air staged [J]. Fuel, 2009, 88: 40-45.

RIBEIRETE A, COSTA M. Impact of the air staged on the performance of a pulverized coal and furnace [J]. Proceeding of the Combustion Institute, 2009, 32(2): 2667-2673.

王涌, 周屈兰, 刘国庆, 等. 分离式燃尽风降低锅炉NOx排放的试验研究 [J]. 工程热物理学报, 2011, 32(2): 243-246.

WANG Yong, ZHOU Qulan, LIU Guoqing, et al. Experimental study of the effects of SOFA on the denitration process in PC boiler [J]. Journal of Engineering Thermophysics, 2011, 32(2): 243-246.

YANG Jiancheng, SUN Rui, SUN Shaozeng, et al. Experimental study on NOx reduction from staging combustion of high volatile pulverized coals: part 1 Air staged [J]. Fuel Processing Technology, 2014, 126: 266-275.

吕嗣晨, 王川保, 赵军, 等. 煤粉燃烧过程中H2S生成详细机理研究 [J]. 西安交通大学学报, 2020, 54(4): 68-75.

LÜ Sichen, WANG Chuanbao, ZHAO Jun, et al. A study on detailed mechanism of H2S formation during pulverized coal combustion [J]. Journal of Xi'an Jiaotong University, 2020, 54(4): 68-75.

SHIRAI H, IKEDA M, ARAMAKI H. Characteristics of hydrogen sulfide formation in pulverized coal combustion [J]. Fuel, 2013, 114: 114-119.

YANG Weijuan, YOU Rongzhen, WANG Zhihua, et al. Effects of near-wall air application in a pulverized-coal 300 MWe utility boiler on combustion and corrosive gases [J]. Energy Fuels, 2017, 31(9): 10075-10081.

马红和, 周璐, 马素霞, 等. 煤粉燃烧过程中H2S生成机理研究进展 [J]. 热力发电, 2019, 48(1): 1-5.

MA Honghe, ZHOU Lu, MA Suxia, et al. Progress in mechanism of H2S formation during pulverized coal combustion [J]. Thermal Power Generation, 2019, 48(1): 1-5.

MA Honghe, ZHOU Lu, MA Suxia, et al. Design of porous wall air coupling with air staged furnace for preventing high temperature corrosion and reducing NOx emissions [J]. Applied Thermal Engineering, 2017, 124(9): 865-870.

张向宇, 杨玉, 白文刚, 等. 准东煤旋风燃烧的数值模拟 [J]. 西安交通大学学报, 2019, 53(11): 112-117.

ZHANG Xiangyu, YANG Yu, BAI Wengang, et al. Numerical simulation on the cyclone combustion of Zhundong coal [J]. Journal of Xi'an Jiaotong University, 2019, 53(11): 112-117.

TOMITA A. Suppression of nitrogen oxides emission by carbonaceous reductants [J]. Fuel Processing Technology, 2001, 71(1/2/3): 53-70.

ZHANG Zhi, CHEN Denggao, LI Zhenshan, et al. Development of sulfur release and reaction model for computational fluid dynamics modeling in sub-bituminous coal combustion [J]. Energy Fuels, 2017, 31(2): 1383-1398.

FAN Weidong, LI Yu, XIAO Meng. Effect of preoxidation O2 concentration on the reduction reaction of NO by char at high temperature [J]. Industrial Engineering Chemistry Research, 2013, 52(18): 6101-6111.

YANG J, MESTL G, HEREIN D, et al. Reaction of NO with carbonaceous materials: 2 Effect of oxygen on the reaction of NO with ashless carbon black [J]. Carbon, 2000, 38(5): 729-740.

FAN Weidong, LIN Zhengchun, KUANG Jinguo, et al. Impact of air staging along furnace height on NOx emissions from pulverized coal combustion [J]. Fuel Processing Technology, 2010, 91(6): 625-634.

MA Honghe, ZHOU Lu, MA Suxia, et al. Impact of the multihole wall air coupling with air staged on NOx emission during pulverized coal combustion [J]. Energy Fuels, 2018, 32(2): 1464-1473.

FAN Weidong, LI Yu, GUO Qinghong, et al. Coal-nitrogen release and NOx evolution in the oxidant-staged combustion of coal [J]. Energy, 2017, 125: 417-426.

SUZUKI T, KYOTANI T, TOMITA A. Study on the carbon-nitric oxide reaction in the presence of oxygen [J]. Industrial Engineering Chemical Research, 1994, 33(11): 2840-2845.

CODA B, KLUGER F, FÖRTSCH D, et al. Coal-nitrogen release and NOx evolution in air-staged combustion [J]. Energy Fuels, 1998, 12: 1322-1327.

YAMASHITA H, TOMITA A. Influence of char surface chemistry on the reduction of nitric oxide with chars [J]. Energy Fuels, 1993, 7(1): 85-89.

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