[1]姚露,陈天杰,刘建民,等.组合式贴壁风对660 MW锅炉燃烧过程的影响[J].东南大学学报(自然科学版),2015,45(1):85-90.[doi:10.3969/j.issn.1001-0505.2015.01.016]
 Yao Lu,Chen Tianjie,Liu Jianmin,et al.Influence of closing-to-wall air on combustion process in 660 MW opposed firing boiler[J].Journal of Southeast University (Natural Science Edition),2015,45(1):85-90.[doi:10.3969/j.issn.1001-0505.2015.01.016]
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组合式贴壁风对660 MW锅炉燃烧过程的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
45
期数:
2015年第1期
页码:
85-90
栏目:
能源与动力工程
出版日期:
2015-01-20

文章信息/Info

Title:
Influence of closing-to-wall air on combustion process in 660 MW opposed firing boiler
作者:
姚露1陈天杰1刘建民2黄启龙2陈国庆2金保昇1张勇1
1东南大学能源热转换及其过程测控教育部重点实验室, 南京 210096; 2国电科学技术研究院, 南京 210033
Author(s):
Yao Lu1 Chen Tianjie1 Liu Jianmin2 Huang Qilong2Chen Guoqing2 Jin Baosheng1 Zhang Yong1
1Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China
2Guodian Science and Technology Research Institute, Nanjing 210033, China
关键词:
高温腐蚀 旋流燃烧 贴壁风 数值模拟
Keywords:
high temperature corrosion opposed firing closing-to-wall air numerical simulation
分类号:
TK224
DOI:
10.3969/j.issn.1001-0505.2015.01.016
摘要:
为防止电厂660 MW对冲燃烧锅炉出现水冷壁高温腐蚀现象,提出了锅炉前后墙和侧墙同时布置贴壁风的新型组合式方案.采用数值计算方法,对锅炉在原始工况和贴壁风工况下的炉内燃烧、传热及流动过程进行了数值模拟,重点考察了贴壁风对炉内速度场、温度场及烟气组分浓度场的影响.结果表明:模拟预测的强还原性区域与锅炉实际发生高温腐蚀区域相吻合;组合式贴壁风提高了侧墙的O2覆盖率,增加了覆盖区域的含氧量,而CO明显降低;贴壁风加入前后炉内燃烧温度和各组分浓度变化不大,对炉内燃烧几乎没有影响;从燃尽风引出的组合式贴壁风削弱了空气分级低氮燃烧作用,NOxx排放略有增加.
Abstract:
To avoid the high temperature corrosion in a 660 MW opposed firing boiler, a new method is developed, in which closing-to-wall air is set on both front and rear walls and side walls. Numerical simulation was carried out on furnace combustion, heat transfer and flow process for both original and closing-to-wall air conditions, mainly focused on influence of closing-to-wall air on distributions of velocity, temperature and components concentrations. The results show that strong reducing atmosphere region is consistent with the actual high temperature corrosion region in boiler. The coverage scale of O2 on the side walls is increased by the closing-to-wall air, where the O2 concentration is also increased. However, the CO concentration is significantly decreased. The closing-to-wall air has no effect on combustion as the temperature and components concentration are seldom changed before and after adding it. As the closing-to-wall air is introduced from over-fired-air, the air staging de-NOxx combustion function is weakened, and then the NOxx emission is slightly increased.

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备注/Memo

备注/Memo:
收稿日期: 2014-09-22.
作者简介: 姚露(1991—),女,硕士生;金保昇(联系人),男,教授,博士生导师,bsjin@seu.edu.cn.
引用本文: 姚露,陈天杰,刘建民,等.组合式贴壁风对660 MW锅炉燃烧过程的影响[J].东南大学学报:自然科学版,2015,45(1):85-90. [doi:10.3969/j.issn.1001-0505.2015.01.016]
更新日期/Last Update: 2015-01-20