APPLICATION OF NODE FUNCTION ZONE IN LOW NO<sub>x</sub> BURNER TECHNOLOGY FOR COAL-FIRED BOILERS

LI Ming1; OU Zongxian1; CUI Jinlei1; ZHANG Xiaoyong1; YAN Weiping2 1.Yantai Longyuan Electric Power Technology Co Ltd

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APPLICATION OF NODE FUNCTION ZONE IN LOW NO_x BURNER TECHNOLOGY FOR COAL-FIRED BOILERS

更新时间：2025-09-28

- APPLICATION OF NODE FUNCTION ZONE IN LOW NO_x BURNER TECHNOLOGY FOR COAL-FIRED BOILERS
- Thermal Power Generation Vol. 41, Issue 5, Pages: 27-30(2012)
- 作者机构：
  
  1. 烟台龙源电力技术股份有限公司
  2. 华北电力大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： X701
- Published：2012
- 稿件说明：
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LI Ming1, OU Zongxian1, CUI Jinlei1, et al. APPLICATION OF NODE FUNCTION ZONE IN LOW NO_x BURNER TECHNOLOGY FOR COAL-FIRED BOILERS[J]. Thermal power generation, 2012, 41(5): 27-30.
DOI：

LI Ming1, OU Zongxian1, CUI Jinlei1, et al. APPLICATION OF NODE FUNCTION ZONE IN LOW NO_x BURNER TECHNOLOGY FOR COAL-FIRED BOILERS[J]. Thermal power generation, 2012, 41(5): 27-30. DOI：

摘要

在燃煤锅炉燃烧系统主燃区引入节点功能区的概念

运用浓淡煤粉燃烧器和贴壁风技术

将相邻2层一次风喷口中的下层设计为上浓下淡煤粉喷口

将上层设计为下浓上淡煤粉喷口

设置2层一次风喷口之间的二次风与一次风小角度偏置

同时在中间二次风两侧布置贴壁风

利用CFD数值模拟软件计算煤粉燃烧过程中节点功能区的速度场、温度场及O2和CO浓度场分布

使燃烧系统实现了稳燃、低NOx排放、防结焦及防高温腐蚀等多重功能。应用结果表明

运用节点功能区的低NOx燃烧系统中

NOx排放浓度减少50%～70%

飞灰可燃物含量无明显升高

结焦现象得到改善。

Abstract

The concept of node function zone has been introduced into main combustion zone of the combustion system for coal-fired boilers.By using technologies of thick-and-thin pulverized coal burners as well as the wall-sticking air

the primary air injecting nozzles of two neighbouring levels have been designed

the injecting nozzles in lower level are thick burner at upper part and thin burner at lower part

whereas the injecting nozzles in upper level are thin burner at upper part and thick burner at lower part;the secondary air between two levels of primary air injecting nozzles is biased with primary air at a small angle

at the same time

the wall-sticking air is arranged at two sides of the central secondary air.By using the CFD numerical simulation software

the distribution of velocity field

temperature field

as well as O2 and CO concentration field over node function zone in the combustion process of pulverized coal has been calculated

and many functions

such as ignition and combustion stabilization

low emission of NO x

prevention of slagging and high-temperature corrosion etc.

being arranged to air compartments for pulverized coal and air.Results of application show that the utilization of low NO x combustion system in node function zone can make the concentration of NO x emission to be effectively reduced

at the same time

the combustible content in fly ash hasn ’ t substantially increased

and the slagging phenomenon being remarkablly improved.

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APPLICATION OF NODE FUNCTION ZONE IN LOW NOx BURNER TECHNOLOGY FOR COAL-FIRED BOILERS

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摘要

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APPLICATION OF NODE FUNCTION ZONE IN LOW NO_x BURNER TECHNOLOGY FOR COAL-FIRED BOILERS