华电技术 ›› 2019, Vol. 41 ›› Issue (9): 56-58.

• 节能与环保 • 上一篇    下一篇

中间仓储式热风送粉贫煤锅炉低氮燃烧器改造

  

  1. 1.中节环立为(武汉)能源技术有限公司,武汉〓4300002.上海发电设备成套设计研究院有限责任公司,上海〓200240

  • 出版日期:2019-09-25 发布日期:2019-10-18

Retrofit of lownitrogen burner in lean coal boiler with storagetype hot air pulverized coal feeding system

  1. 1.CEE Leaway(Wuhan) Energy Technology Company Limited, Wuhan  430000,China; 2.Shanghai Power Equipment Research Institute Company Limited, Shanghai 200240, China

  • Online:2019-09-25 Published:2019-10-18

摘要:

针对中间仓储式热风送粉贫煤锅炉采用分级燃烧方式时,存在的飞灰含碳量和排烟温度高的问题,提出了一种将三次风进行浓淡分离并重新布置三次风喷口的燃烧器改造方案。改造后,在煤质挥发分下降的情况下,省煤器出口NOx排放质量浓度从620.75mg/m3降至487.00mg/m3,飞灰含碳量、炉渣含碳量及排烟温度均下降,达到了低氮改造的预期目标。

关键词:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">燃烧器, 三次风, 浓淡分离, 中间仓储式热风制粉系统, 贫煤锅炉, NOfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">xfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">质量浓度

Abstract:

Unburned combustible in fly ash and hightemperature exhausted gas is prevail in storagetype hot wind pulverized coal feeding system of lean coal boilers taking staged combustion.Tertiary air richlean separation and rearranging the tertiary air nozzles was proposed as a retrofit scheme. After retrofitting, when the content of volatile matter decreased,the mass concentration of NOx at the economizer outlet decreased from 620.75mg/m3 to 487.00mg/m3and unburned combustible in fly ash and slag decreased as welland so did the temperature of exhausted gaswhich met the expectation of lownitrogen burner retrofit.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">burner, tertiary airrichfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">lean separating;storagefont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">type hot air pulverized coal feeding system, lean coal boiler, mass concentration of NOfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">x