Experimental study on low NO<sub>x</sub> combustion system retrofitting in a 150MW unit boiler

LI Yan; YANG Zhongcan; CHEN Hongwei; ZHU Anyu; LI Shanghua

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Experimental study on low NO_x combustion system retrofitting in a 150MW unit boiler

更新时间：2025-09-28

- Experimental study on low NO_x combustion system retrofitting in a 150MW unit boiler
- Thermal Power Generation Vol. 43, Issue 8, Pages: 105-110(2014)
- 作者机构：
  
  1. 华北电力大学能源与动力工程学院
  2. 西安热工研究院有限公司
  3. 国网能源新疆阜康发电有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK223.2
- Published：2014
- 稿件说明：
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LI Yan, YANG Zhongcan, CHEN Hongwei, et al. Experimental study on low NO_x combustion system retrofitting in a 150MW unit boiler[J]. Thermal power generation, 2014, 43(8): 105-110.
DOI：

LI Yan, YANG Zhongcan, CHEN Hongwei, et al. Experimental study on low NO_x combustion system retrofitting in a 150MW unit boiler[J]. Thermal power generation, 2014, 43(8): 105-110. DOI：

摘要

为降低NOx排放浓度

减轻结焦

对150MW机组480t/h四角切圆燃烧锅炉采用燃料浓淡分级与加装分离燃尽风(SOFA)相结合的技术进行燃烧系统改造

并进行了改造后燃烧优化调整试验。结果表明:SOFA挡板55%开度且开启2层挡板时

锅炉NOx排放量均可降至250mg/m3以下

较改造前的550mg/m3降低约55%

减排效果明显;燃用五彩湾煤时

锅炉效率可达到92%以上

最优工况下可达到92.48%

较改造前91.69%提高了0.79%;炉膛出口烟温能够控制在850℃以下

有效地减轻了高温受热面结焦

保证锅炉长期经济、安全运行。

Abstract

In order to reduce the NOxemission and inhibit coking in boiler furnace

transformation was carried out on a 480t/h tangentially fired boiler

by using the technology combining the fuel-staged combustion technology with installation of the separated over firing air(SOFA)nozzles above the highest secondary air nozzles.Moreover

combustion optimization and regulation tests were performed after the retrofitting.The results indicate that:the NOxemission decreased to lower than 250mg/m3(by 55%)when the SOFA damper opened with two layers and with opening degree of 55%;when burning Wucaiwan coal

the boiler had efficiency higher than 92%

and the optimal efficiency reached up to 92.48%

about 0.79%higher than that before the retrofitting;the exhaust temperature was lower than 850℃

which can prevent the boiler from coking on heating surface effectively

and ensure the economy and safety of boiler operation.

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Experimental study on low NOx combustion system retrofitting in a 150MW unit boiler

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摘要

Abstract

关键词

Keywords

references

Experimental study on low NO_x combustion system retrofitting in a 150MW unit boiler