褐煤锅炉改造及燃烧优化

由于设计和实际运行中煤质变动等原因,某褐煤锅炉出现了受热面超温、排烟温度高、燃烧器结焦等问题。通过分析诊断,对褐煤锅炉提出了燃烧器、低温过热器和省煤器的改造方案。安装了新的燃烧器及附属设备,将部分低温过热器受热面更换为等级更高的材质,同时增加了省煤器面积。经过燃烧优化试验,锅炉的最大出力提高至410 t/h,磨煤机最大干燥出力可达31 t/h,在锅炉最大出力工况下实测锅炉热效率为91.96%。长时间平稳运行表明,本次改造取得了较为理想的效果,可为国内同类锅炉的改造和优化调整提供参考。

Technological Retrofit and Combustion Optimization for Lignite Boilers

Influenced by the original design and the actual variation of the coals,the serious boiler problems, such as the overtemperature of the heating surfaces,the over-high temperature of the exhausting gas and the slagging on the burner zone,appeared in a domestic power generation company. Based on the technology analysis,the reconstruction had been performed for the burners, the low-temperature superheater and the economizer. The new burners as well as the auxiliary were installed,parts of the low-temperature superheater were replaced with better pipes and the area of the economizer increased. After the combustion optimization tests,the maximum output of the boiler can be 410t/h, the maximum drying output of the pulverizers can be as high as 31 t/h and the boiler efficiency can reach to 91.96% under such condition. The steady running shows that the technological reconstruction is successful and the present case could be referenced by the similar boiler in the domestic power plant.