Experimental research on large proportion co-firing of semi-coke in a 300 MW pulverized coal boiler

YANG Jianfeng; DU Jin; HUANG Pu; LI Haiping; CHEN Yiping; SHEN Ming; WANG Zhichao; LIU Hao

doi:10.19666/j.rlfd.201911270

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Experimental research on large proportion co-firing of semi-coke in a 300 MW pulverized coal boiler

更新时间：2025-09-28

- Experimental research on large proportion co-firing of semi-coke in a 300 MW pulverized coal boiler
- Thermal Power Generation Vol. 49, Issue 7, Pages: 69-76(2020)
- 作者机构：
  
  1. 高效清洁火力发电技术湖南省重点实验室(国网湖南省电力有限公司电力科学研究院)
  2. 湖南省湘电试验研究院有限公司
  3. 长安石门发电有限公司
  4. 华中科技大学煤燃烧国家重点实验室
  5. 西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201911270
  CLC： TK227.1
- Published Online：27 June 2020，
  
  Published：2020
- 稿件说明：
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YANG Jianfeng, DU Jin, HUANG Pu, et al. Experimental research on large proportion co-firing of semi-coke in a 300 MW pulverized coal boiler[J]. Thermal power generation, 2020, 49(7): 69-76.
DOI：

YANG Jianfeng, DU Jin, HUANG Pu, et al. Experimental research on large proportion co-firing of semi-coke in a 300 MW pulverized coal boiler[J]. Thermal power generation, 2020, 49(7): 69-76. DOI： 10.19666/j.rlfd.201911270.

摘要

为推动煤热解产物半焦在电站锅炉上的安全高效利用

在某300 MW机组煤粉锅炉上开展了大比例掺烧半焦的现场试验

对不同半焦掺烧比例下的锅炉性能及NOx排放特性进行了比较分析。结果表明:半焦具有良好的着火性能

掺烧后能够改善原煤质的燃烧特性;采用"分磨制粉、分仓储存、炉内分层掺混"的掺烧方式可以实现半焦掺烧比例50%下锅炉的安全稳定运行;在300 MW负荷下

与掺烧前相比

半焦掺烧比例为50%时

锅炉效率从90.36%升高至92.79%

炉堂出口NOx排放质量浓度从493.85 mg/m~3降低至435.86 mg/m~3。煤粉锅炉大比例掺烧半焦可提高锅炉效率

降低NOx排放质量浓度

但是炉膛出口温度稍有增加

减温水量增大。

Abstract

In order to comprehensively utilize the semi-coke resources generated by coal pyrolysis

field test about large proportion co-firing of semi-coke was carried out on a 300 MW pulverized coal boiler

and the boiler performance as well as the NO_x emission characteristics were investigated under different conditions. The results show that

the semi-coke had good ignition performance and could improve the combustion characteristics of the raw coal. By adopting the blending method of "grinded by different mills

separated storage and stratified mixing in the furnace"

the boiler with semi-coke's co-firing proportion of 50% could realize safe and stable operation. At 300 MW

when the blending proportion of semi-coke reached 50%

the boiler efficiency increased from 90.36%(before co-firing) to 92.79%

and the NO_x emission mass concentration decreased from 493.85 mg/m~3(before cofiring) to 435.86 mg/m~3. Co-firing large proportion of semi-coke can enhance the pulverized coal boiler's efficiency and reduce the NO_x emission mass concentration

but increase the temperature at the furnace outlet slightly as well as the amount of cooling water.

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