低氮改造后再热汽温偏低的燃烧调整研究

doi:10.12096/j.2096-4528.pgt.19084

发电技术 ›› 2019, Vol. 40 ›› Issue (5): 475-480.DOI: 10.12096/j.2096-4528.pgt.19084

低氮改造后再热汽温偏低的燃烧调整研究

胡胜林¹(),李源¹(),毛睿¹,詹胜平¹,任利明¹,郭志成¹,岑可法²

¹ 润电能源科学技术有限公司, 河南省郑州市 450042
² 能源清洁利用国家重点实验室(浙江大学), 浙江省杭州市 310027

收稿日期:2019-05-22 出版日期:2019-10-30 发布日期:2019-11-05
作者简介:胡胜林(1983),男,工程师,研究方向为火力发电厂系统调试与超低排放, hushenglin@crpower.com.cn|李源(1990),男,博士,工程师,研究方向为能源清洁高效利用, liyuan355@crpower.com.cn|岑可法(1935),男,中国工程院院士,主要从事化石燃料的能源高效清洁利用、城市生活垃圾等废弃物资源化、能源化、生物质燃烧气化制油、水煤浆代油技术等方面的研究工作
基金资助:
国家自然科学基金创新研究群体项目(51621005)

Study on Low Reheat Steam Temperature After Low NO_x Retrofit Based on Combustion Adjustment

Shenglin HU¹(),Yuan LI¹(),Rui MAO¹,Shengping ZHAN¹,Liming REN¹,Zhicheng GUO¹,Kefa CEN²

¹ Rundian Energy Science and Technology Co., Ltd., Zhengzhou 450042, Henan Province, China
² State Key Laboratory of Clean Energy Utilization(Zhejiang University), Hangzhou 310027, Zhejiang Province, China

Received:2019-05-22 Published:2019-10-30 Online:2019-11-05
Supported by:
国家自然科学基金创新研究群体项目(51621005)

摘要/Abstract

摘要：

针对某330 MW燃煤锅炉低氮改造后出现的再热汽温偏低问题，从锅炉燃烧调整策略角度进行对策研究，主要分析了燃烧器摆角、配风方式、燃烧器投运层分布、上层煤种、上层煤粉细度、水平烟道吹灰和机组自动调节品质等因素对再热汽温的影响。结果表明，再热汽温偏低的现象主要出现在锅炉中低负荷（250 MW以下）工况，通过增加燃烧器仰角、采用倒宝塔配风方式、提高上层燃烧器利用率、加大上层入炉煤发热量、减小上层入炉煤粉细度、加强水平烟道吹灰和优化机组自动调节品质等手段可改善再热汽温偏低问题。提出的燃烧调整策略对同类锅炉改造问题具有重要借鉴意义。

关键词: 燃煤锅炉, 低氮改造, 再热汽温, 燃烧调整

Abstract:

To solve the problem of low reheat steam temperature after low NO_x retrofit in a 330 MW coal-fired boiler, the countermeasure study was conducted based on combustion adjustment strategies. The effects of burner angle, air distribution mode, burner layer distribution, coal type of upper layer, coal fineness of upper layer, ash blowing of horizontal flue, and automatic control quality on reheat steam temperature were analyzed. The results indicate that the low reheat steam temperature mainly occurs at medium-low load (lower than 250 MW). Increasing burner angle, using inverted tower air distribution, increasing utilization rate of upper burner, improving coal calorific of upper layer, decreasing coal fineness of upper layer, strengthening ash blowing of horizontal flue and optimizing automatic control quality are conducive to improving the reheat steam temperature. The proposed combustion adjustment strategies provide important reference for the similar problem in boiler retrofit.

Key words: coal-fired boiler, low NO_x retrofit, reheat steam temperature, combustion adjustment

胡胜林,李源,毛睿,詹胜平,任利明,郭志成,岑可法. 低氮改造后再热汽温偏低的燃烧调整研究[J]. 发电技术, 2019, 40(5): 475-480.

Shenglin HU,Yuan LI,Rui MAO,Shengping ZHAN,Liming REN,Zhicheng GUO,Kefa CEN. Study on Low Reheat Steam Temperature After Low NO_x Retrofit Based on Combustion Adjustment[J]. Power Generation Technology, 2019, 40(5): 475-480.

参考文献

1	Leung G C K , Cherp A , Jewell J , et al. Securitization of energy supply chains in China[J].Applied Energy, 2014, 123:316- 26.
2	戴德立.BP世界能源统计年鉴[Z/OL].北京: BP集团, 2017.https: //www.bp.com/zh_cn/china/reports-and-publications/_bp_2017-_.html.
3	王志轩, 赵毅, 潘荔, 等. 中国燃煤电厂NOx排放估算方法及排放量研究[J]. 中国电力, 2009, 42 (4): 59- 62.
4	游松林, 罗洪辉, 王振, 等. 燃煤电厂SCR脱硝系统氨逃逸率控制技术研究[J]. 华电技术, 2019, 41 (2): 55- 59.
5	吴跃明, 吴智泉. 660 MW超临界燃煤锅炉引入生物质气再燃方案及运行特性分析[J]. 分布式能源, 2018, 3 (1): 14- 20.
6	唐艳梅, 闫华光, 朱彬若, 等. 基于自适应遗传算法的分布式综合能源系统优化设计[J]. 电网与清洁能源, 2018, 34 (2): 30- 35, 42.
7	Zheng L , Zhou H , Cen K , et al. A comparative study of optimization algorithms for low NOx combustion modification at a coal-fired utility boiler[J].Expert Systems with Applications, 2009, 36 (2): 2780- 2793.
8	Shi R , Lin X , Zheng Z , et al. Selective catalytic reduction of NOx with NH3 over Sb modified CeZrOx catalyst[J].Reaction Kinetics, Mechanisms and Catalysis, 2018, 124 (1): 217- 227.
9	李二欣, 王特, 韦飞. 燃煤电厂SCR脱硝系统尿素热解制氨技术节能改造[J]. 广东电力, 2018, 31 (3): 27- 31.
10	Fu S , Song Q , Yao Q . Mechanism study on the adsorption and reactions of NH3, NO, and O2 on the CaO surface in the SNCR deNOx process[J].Chemical Engineering Journal, 2016, 285:137- 143.
11	Gullett B K , Groff P W , Lin M L , et al. NOx removal with combined selective catalytic reduction and selective noncatalytic reduction:pilot-scale test results[J].Air & Waste, 1994, 44 (10): 1188- 1194.
12	Liu X , Tan H Z , Wang Y B , et al. Low NOx combustion and SCR flow field optimization in a low volatile coal fired boiler[J].Journal of Environmental Management, 2018, 220:30- 35.
13	胡志宏, 李德功, 邵红军, 等. 600 MW机组锅炉低氮燃烧改造[J]. 热力发电, 2014, 43 (4): 131- 134.
14	刘志江. 低氮燃烧器改造及其存在问题处理[J]. 热力发电, 2013, 42 (3): 77- 81.
15	李翠翠, 郑国宽, 陈广林. 600 MW级燃褐煤直流锅炉超低排放技术路线分析[J]. 电力科学与工程, 2017, 33 (3): 68- 73.
16	党黎军, 杨辉, 应文忠, 等. 660 MW超超临界锅炉再热汽温偏低问题分析及技术改造[J]. 动力工程学报, 2017, 37 (4): 261- 266.
17	肖琨, 张建文, 王振东. 600 MW亚临界锅炉低氮改造后汽温特性研究[J]. 动力工程学报, 2015, 35 (9): 699- 703.

[1]	熊小鹤, 陈发林, 阮仁晖, 谭厚章, 李延森. 高温腐蚀锅炉水冷壁还原性气氛多组分同步测试试验[J]. 发电技术, 2023, 44(6): 800-808.
[2]	李源, 郭志成, 孟晓超, 陈科峰, 任利明, 毛睿, 岑可法. 基于可调谐二极管激光吸收光谱技术的炉内燃烧场参数在线监测系统设计[J]. 发电技术, 2022, 43(2): 353-361.
[3]	孙献斌,戚峰,辛以振,袁文杰,高永翔,郝如平,曹林涛,郭安. 330 MW循环流化床锅炉燃烧调整试验研究[J]. 发电技术, 2019, 40(3): 281-285.
[4]	崔晓波,刘久斌,朱红霞,张轩振,顾慧,王亮. 基于自抗扰Smith预估补偿方法的超临界机组再热汽温控制研究[J]. 发电技术, 2018, 39(4): 367-372.
[5]	徐鹏志, 刘朋彬, 陈军华, 车方. 660MW锅炉低氮旋流燃烧器NOx排放调整试验研究[J]. 发电技术, 2017, 38(5): 16-21.

低氮改造后再热汽温偏低的燃烧调整研究

Study on Low Reheat Steam Temperature After Low NO_x Retrofit Based on Combustion Adjustment

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 5

编辑推荐

Metrics

本文评价

低氮改造后再热汽温偏低的燃烧调整研究

Study on Low Reheat Steam Temperature After Low NOx Retrofit Based on Combustion Adjustment

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 5

编辑推荐

Metrics

本文评价

Study on Low Reheat Steam Temperature After Low NO_x Retrofit Based on Combustion Adjustment