Analysis and verification of refractory belt arrangement for coal-fired boilers

GENG Xiangjin; FANG Yong; ZHU Kaixuan; XU Qilian; QIU Jihua

doi:10.19666/j.rlfd.201711174

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Analysis and verification of refractory belt arrangement for coal-fired boilers

更新时间：2025-09-28

- Analysis and verification of refractory belt arrangement for coal-fired boilers
- Thermal Power Generation Vol. 47, Issue 8, Pages: 132-137(2018)
- 作者机构：
  
  1. 云南电力试验研究院(集团)有限公司
  2. 华中科技大学煤燃烧国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201711174
  CLC： TK221
- Published Online：02 August 2018，
  
  Published：2018
- 稿件说明：
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GENG Xiangjin, FANG Yong, ZHU Kaixuan, et al. Analysis and verification of refractory belt arrangement for coal-fired boilers[J]. Thermal power generation, 2018, 47(8): 132-137.
DOI：

GENG Xiangjin, FANG Yong, ZHU Kaixuan, et al. Analysis and verification of refractory belt arrangement for coal-fired boilers[J]. Thermal power generation, 2018, 47(8): 132-137. DOI： 10.19666/j.rlfd.201711174.

摘要

为了探寻卫燃带布置方式对锅炉燃烧稳定性及结焦的影响

本文以某电厂300 MW机组切圆燃烧锅炉为例

根据炉膛水冷壁热负荷分布曲线特点

将卫燃带分成大块和小块2种形状

按卫燃带敷设面积与煤粉着火区域水冷壁热负荷的大小成反比

将卫燃带布置在下组煤粉燃烧器附近的水冷壁上

促进煤粉的着火和稳定燃烧

并避免卫燃带结焦。通过对3个卫燃带敷设方案的数值模拟和燃烧试验

结果表明:依据水冷壁热负荷分布特点进行卫燃带布置

适当减少高负荷区域的卫燃带布置

增加低负荷区域卫燃带(燃烧器出口背火侧)的布置

能够有效减少卫燃带敷设带来的结焦风险

且能保证锅炉的燃烧稳定

提高锅炉热效率。

Abstract

In order to explore the influence of refractory belt arrangement on stable combustion and slagging of the boiler

this study takes a 300 MW tangentially fired boiler as an example. The refractory belt is divided into two kinds: large pieces and small pieces

according to the characteristics of heat load distribution curve of furnace water wall. Because the area of refractory belt is inversely proportional to the size of the heat load of water wall in the pulverized coal ignition region

the refractory belt is arranged on the water wall near to the next group of pulverized coal burner

which not only promotes the ignition and stable combustion of pulverized coal

but also avoids the slagging on the refractory belt. Through numerical simulation and combustion tests of three schemes of refractory belt arrangement

the results show that

arranging the refractory belt according to the characteristics of heat load distribution of water wall

appropriately reducing the arrangement of the refractory belt in the high load zone and increasing the arrangement of the refractory belt in the low load zone(back-fire side of the burner exit)

can effectively reduce the risk of slagging

ensure the stable combustion of the boiler

and improve the thermal efficiency of the boiler.

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