NO<sub>2</sub> formation in natural gas-fired boilers

WANG Zhining; YANG Xiehe; ZHANG Yang; JIN Yan; ZHANG Hai; LYU Junfu

doi:10.11949/0438-1157.20190111

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NO₂ formation in natural gas-fired boilers

更新时间：2026-07-24

- NO₂ formation in natural gas-fired boilers
- CIESC Journal Vol. 70, Issue 8, Pages: 3121-3131(2019)
- 作者机构：
  
  1.太原理工大学电气与动力工程学院，山西太原 030024
  2.清华大学能源与动力工程系, 热科学与动力工程教育部重点实验室，北京 100084
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190111
  CLC： TK 16
- Received：11 February 2019，
  
  Revised：2019-03-20，
  
  Online First：24 July 2026，
  
  Published：05 August 2019
- 稿件说明：
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王志宁, 杨协和, 张扬, 金燕, 张海, 吕俊复. 燃气锅炉中NO₂的生成规律研究[J]. 化工学报, 2019, 70(8): 3121-3131 DOI: 10.11949/0438-1157.20190111.

WANG Zhining, YANG Xiehe, ZHANG Yang, JIN Yan, ZHANG Hai, LYU Junfu. NO₂ formation in natural gas-fired boilers[J]. CIESC Journal, 2019, 70(8): 3121-3131 DOI: 10.11949/0438-1157.20190111.
王志宁, 杨协和, 张扬, 金燕, 张海, 吕俊复. 燃气锅炉中NO₂的生成规律研究[J]. 化工学报, 2019, 70(8): 3121-3131 DOI: 10.11949/0438-1157.20190111. DOI：

WANG Zhining, YANG Xiehe, ZHANG Yang, JIN Yan, ZHANG Hai, LYU Junfu. NO₂ formation in natural gas-fired boilers[J]. CIESC Journal, 2019, 70(8): 3121-3131 DOI: 10.11949/0438-1157.20190111. DOI：

摘要

天然气燃烧过程主要污染物是NO和NO

。针对部分燃气锅炉NO

排放较高的情况，开展了中试实验和数值模拟，研究天然气燃烧过程NO

生成规律。结果表明当锅炉采用“燃烧器分级燃烧+烟气再循环”的低氮燃烧策略时，如果燃烧器的伴流风与燃料的混合被推迟，则NO

的生成量较大，最高超过总NO

生成量的50%，空气和燃料充分混合的条件下NO

生成量较少。NO

在热燃烧产物与冷空气碰撞的交界面上大量生成，NO

生成的温度窗口是800~900 K。NO

主要通过NO与HO

的反应生成，NO

分解后又生成NO，NO

的生成不会显著影响燃烧过程总NO

的排放。

Abstract

The main pollutants of natural gas-fired boilers are NO and NO

. The emission data of two

natural gas-fired boilers were reported in the present paper and NO

emission was found to be high. To understand the high NO

emission in these natural gas-fired boilers

pilot-scale experiments were conducted and detailed chemical kinetic studies were carried out numerically using Chemkin-Pro software. The results showed that the NO

emission would be high if the low NO

strategy “burner staged-combustion + flue gas recirculation” was applied and the mixing of the co-flow air with the staged fuel was delayed. In this situation

the amount of NO

emission even exceeded 50% of the amount of the total NO

emission. When the air and fuel were well mixed

emission was suppressed. NO

mainly formed near the contact surface of the hot burned product flow and cold air flow. A narrow temperature window

800—900 K

was found for NO

formation. The dominating pathway for NO

formation was the reaction between NO and HO

. When NO

decomposed

NO formed. Therefore

the formation of NO

would not significantly affect the total NO

emission of the natural gas-fired boiler.

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Keywords

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⁰

NO2 formation in natural gas-fired boilers

DOI：10.11949/0438-1157.20190111

摘要

Abstract

关键词

Keywords

references

NO₂ formation in natural gas-fired boilers