Effect of Central Air Structure on Flow and Combustion Characteristicsof Swirl Burner in a 350 MW Coal-fired Boiler

刘政; 姜肇中; 黄浩麟; 李争起; 魏新平; 陈智超; 刘华财

doi:10.19805/j.cnki.jcspe.2026.240718

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Effect of Central Air Structure on Flow and Combustion Characteristicsof Swirl Burner in a 350 MW Coal-fired Boiler

更新时间：2026-10-10

- Effect of Central Air Structure on Flow and Combustion Characteristicsof Swirl Burner in a 350 MW Coal-fired Boiler
- Chinese Journal of Power Engineering Vol. 46, Issue 2, Pages: 28-35(2026)
- 作者机构：
  
  1. 哈尔滨工业大学能源科学与工程学院,黑龙江,哈尔滨,150001
  2. 哈工大郑州研究院,河南,郑州,450046
  3. 新疆华电喀什热电有限责任公司,新疆,喀什,844000
  4. 中国科学院广州能源研究所,广东,广州,510640
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.240718
  CLC：
- Online First：10 February 2026，
  
  Published：10 February 2026
- 稿件说明：
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刘政,姜肇中,黄浩麟,李争起,魏新平,陈智超,刘华财. 中心风结构对350 MW锅炉旋流燃烧器流动及燃烧特性的影响动力工程学报, 2026, 46(2): 28-35 https://doi.

org/10.19805/j.cnki.jcspe.2026.240718
刘政,姜肇中,黄浩麟,李争起,魏新平,陈智超,刘华财. 中心风结构对350 MW锅炉旋流燃烧器流动及燃烧特性的影响动力工程学报, 2026, 46(2): 28-35 https://doi. DOI： 10.19805/j.cnki.jcspe.2026.240718.

org/10.19805/j.cnki.jcspe.2026.240718 DOI：

摘要

针对新型低NO

轴向旋流燃烧器(优化前燃烧器简称原型燃烧器)存在的中心风管磨损和低负荷稳燃性能较差的问题

取消了燃烧器的中心风结构(优化后燃烧器简称优化燃烧器)。对上述2种燃烧器进行了实验室1∶4冷态单相模化试验

研究有无中心风结构对燃烧器出口流场的影响。同时

在采用上述2种燃烧器的燃用烟煤350 MW对冲燃烧锅炉上开展了工业试验。结果表明:原型燃烧器和优化燃烧器均在燃烧器出口形成了环形回流区

而优化燃烧器的回流区面积更大

回流区高度由0.07 m(0.2

d为外二次风扩口直径

)增大至0.1 m(0.28

)

回流区高度增大了43%。优化燃烧器的着火距离约为1 m

原型燃烧器的着火距离约为1.15 m

优化燃烧器着火提前

含量下降和CO生成得更早更快。

Abstract

To address the issues of central air duct wear and poor low-load combustion stability performance present in the new type of low-NO

axial swirl burner (the burner before optimization is referred to as the original burner)

the central air structure of the burner was eliminated (the burner after optimization is referred to as the optimized burner). Laboratory 1∶4 cold-state single-phase modeling experiments were conducted on above two types of burners to investigate the impact of the presence or absence of the central air structure on the outlet flow field of the burner. Meanwhile

industrial experiments were carried out on a 350 MW opposed-firing boiler burning

bituminous coal that employed these two types of burners. Results show that both the original burner and the optimized burner form an annular recirculation zone at the burner outlet

while the recirculation zone area of the optimized burner is larger. The height of the recirculation zone increases from 0.07 m (0.2

where

is the flared diameter of the outer secondary air) to 0.1 m (0.28

)

representing a 43% increase in height. The ignition distance of the optimized burner is approximately 1 m

while that of the original burner is approximately 1.15 m. The optimized burner experiences earlier ignition

with O

content decreasing and CO being generated earlier and faster.

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references

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