Effect of air leakage on flue gas components in oxygen-enriched coal-fired units

GAO Jianqiang; WANG Likun; CHENG Shaowei; GU Xingpeng; XUE Nannan

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Effect of air leakage on flue gas components in oxygen-enriched coal-fired units

更新时间：2025-09-28

- Effect of air leakage on flue gas components in oxygen-enriched coal-fired units
- Thermal Power Generation Vol. 43, Issue 10, Pages: 70-73(2014)
- 作者机构：
  
  华北电力大学能源动力与机械工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK229.63
- Published：2014
- 稿件说明：
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GAO Jianqiang, WANG Likun, CHENG Shaowei, et al. Effect of air leakage on flue gas components in oxygen-enriched coal-fired units[J]. Thermal power generation, 2014, 43(10): 70-73.
DOI：

GAO Jianqiang, WANG Likun, CHENG Shaowei, et al. Effect of air leakage on flue gas components in oxygen-enriched coal-fired units[J]. Thermal power generation, 2014, 43(10): 70-73. DOI：

摘要

在干烟气再循环方式下

以某超临界600MW机组富氧煤粉燃烧锅炉为研究对象

分别对富氧煤粉燃烧锅炉在不同负荷、不同漏风系数的条件下

锅炉烟气成分的变化进行了计算和分析。结果表明:在漏风系数一定的条件下

随负荷的增加CO2浓度呈上升趋势

N2、O2浓度呈下降趋势;而漏风系数增加时

烟气中各成分的体积分数变化明显。因此

对富氧煤粉燃烧锅炉密封系统的严密性要求高于常规锅炉。

Abstract

In dry flue gas recirculation mode

taking a supercritical 600 MW unit oxygen-enriched pulverized coal-fired boiler as the research object

calculation on fuel combustion was performed to investigate the variation of flue gas components under conditions with different loads and air leakage coefficients.The results show that

with a certain air leakage coefficient

the CO2 concentration increased with the unit load

while the N2 and O2concentration showed an opposite trend.As the air leakage coefficient increased

the volume fraction of each component in flue gas changed obviously

which put forward higher requirements for sealing system of the oxygen-enriched coal-fired boilers.

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