低氮燃烧器改造后再热器管屏积渣原因分析

Cause analysis of slag depositing on platen type reheater tubes after the reform of low-No_x burner

针对某发电厂锅炉低氮燃烧器改造后发生的高温再热器管屏积渣问题,从运行参数、配煤方式、水平烟道吹灰器型式及受热面变形等方面进行了分析,提出了针对性的解决措施。结果表明:运行中锅炉含氧量偏低,导致炉膛出口烟温升高是造成高温再热器管屏间积渣的主要原因。

Aiming at the problem of slag depositing on platen type high temperature reheater tubes after the reform of low-Nox burner,analyzes the operation parameters,the coal blending way,the horizontal flue ash type and the heating surface deformation,etc.,puts forward targeted countermeasures. The result shows that the oxygen content the exit of hearth is main cause of slag depositing on platen is low,leading to temperature to rise at type high temperature reheater tubes.