华电技术 ›› 2020, Vol. 42 ›› Issue (6): 35-42.

• 节能与环保 • 上一篇    下一篇

330MW热电联产机组锅炉低氮燃烧器改造和燃烧调整

  

  1. 广州中电荔新电力实业有限公司, 广州〓511340

  • 出版日期:2020-06-25 发布日期:2020-06-23

Retrofit and combustion adjustment of a lownitrogen burner in a 330MW cogeneration unit

  1. Guangzhou Zhongdian Lixin Thermoelectric Company Limited, Guangzhou 511340, Guangdong

  • Online:2020-06-25 Published:2020-06-23

摘要:

为响应国家环保政策、降低脱硝运行成本、有效解决氨逃逸率偏高、防止锅炉空气预热器冷端沉积硫酸氢氨致其运行压差大等问题,某电厂330MW热电联产机组 #2锅炉实施了低氮燃烧器改造,采用了煤粉水平浓淡分离与炉内空气分级相结合的低氮燃烧技术。改造后,利用锅炉冷态空气动力场试验和热态燃烧调整试验验证低氮燃烧器改造的效果。试验结果表明,一、二次风及分离燃尽风(SOFA)切圆良好,炉内火焰无偏斜、无冲刷炉墙现象、充满度较好,不同氧量及不同二次风配风方式下炉膛出口 NOx排放质量浓度不超过200mg/m3,达到了改造目标。

关键词:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">热电联产, 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">, 低氮燃烧器, 空气动力场, 燃烧调整, 分离燃尽风, 风箱压差, 超低排放

Abstract:

In respond to the national environmental protection policy, in order to reduce the cost of denitration, alleviate the ammonia escape rate and air preheater pressure difference caused by the accumulation of ammonium hydrogen sulfate on the cold side of the air preheater, a lownitrogen burner of No.2 boiler for a 330MW cogeneration unit was modified through a lownitrogen burner retrofit.The retrofit took horizontal bias combustion technology and air staging combustion technology.The effect of the lownitrogen burner retrofit was verified by the cold aerodynamic field test and the hot combustion adjustment test.The results show that the primary air, secondary air and SOFA works well, and the furnace flame of good fullness shows no eccentricity and does not burn the furnace wall.The NOx mass concentration at the outlet of the furnace does not exceed 200mg/m3 under various conditionswhich means the retrofit has met the requirement.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">cogeneration, 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">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">, lowfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">nitrogen burner, aerodynamic field, combustion adjustment, SOFA, bellows pressure difference, ultrafont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">low emission