Influence of co-firing high suffur coals on operation of a 600MW unit boiler and the operation optimization

TONG Jialin; QI Xiaojuan; LYU Hongkun

doi:10.19666/j.rlfd.201901017

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Influence of co-firing high suffur coals on operation of a 600MW unit boiler and the operation optimization

Thermal Power Generation Vol. 48, Issue 10, Pages: 128-133(2019)

更新时间：2025-09-28

- Influence of co-firing high suffur coals on operation of a 600MW unit boiler and the operation optimization
- 作者机构：
  
  1. 国网浙江省电力有限公司电力科学研究院
  2. 杭州意能电力技术有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201901017
  CLC： TK16;TM621.2
- Published Online：29 September 2019，
  
  Published：2019
- 稿件说明：
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TONG Jialin, QI Xiaojuan, LYU Hongkun. Influence of co-firing high suffur coals on operation of a 600MW unit boiler and the operation optimization[J]. Thermal Power Generation, 2019, 48(10): 128-133.
DOI：

TONG Jialin, QI Xiaojuan, LYU Hongkun. Influence of co-firing high suffur coals on operation of a 600MW unit boiler and the operation optimization[J]. Thermal Power Generation, 2019, 48(10): 128-133. DOI： 10.19666/j.rlfd.201901017.

摘要

电站锅炉掺烧高硫煤会给锅炉运行带来不利影响。本文通过数值模拟研究了掺烧高硫煤前后炉内贴壁腐蚀性气氛、煤粉燃尽率、污染物排放等参数的变化

并对掺烧高硫煤后烟气酸露点的变化进行了计算。结果表明:掺烧高硫煤后

炉内贴壁H_2S体积分数明显上升

高温腐蚀风险加大

同时煤粉燃尽率降低

烟气酸露点提高;在下层燃烧器层掺烧高硫煤

高金属壁温区域高H_2S体积分数区域面积占比较小

约为35%

较常规运行工况炉膛出口CO体积分数上升约0.35%

固体可燃物质量浓度上升约0.4 g/m~3

其效果较中、上层燃烧器层掺烧更具优势。

Abstract

Co-firing high suffur coals has adverse effects on boilers' operation. Numerical simulations are conducted to study the combustion characteristics before and after co-firing high suffur coals

such as the corrosive gas near the water wall

the burnout rate and pollutant emission. Moreover

the acid dew point is calculated after co-firing high suffur coals. The results show that

the volume fraction of H_2S near the water wall rises and the risk of hightemperature corrosion increases after co-firing high suffur coals. Meanwhile

the burnout rate reduces and the acid dew point increases. When co-firing high suffur coals in lower burners

the area containing high volume fraction of H_2S is lower

about 35%. Compared with the conventional operating conditions

the volume fraction of CO rises by about 0.35% and the mass fraction of solid combustibles rises by about 0.4 g/m~3. The effects of co-firing high suffur coals in lower burners are better than in intermediate and upper burners.

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