国内首台600MW对冲燃烧锅炉低NOx燃烧技术改造

摘要

In order to minimize the possible negative effect after boiler low NOx combustion technical retrofit, the design optimization for staged combustion of main burner was emphasized, the larger chemical equivalent proportion of main burning area was adopted, the sensitivity and the dependence of chemical equivalent proportion of main burning area were reduced, and the heating surface was adjusted and rotating classifier for mill was installed in burner retrofit design. After the retrofit, the overall performance of the boiler achieves the expected goals and the NOx reduction rate reaches to 50％.%为将锅炉低NOx燃烧技术改造可能产生的负面影响减至最低程度,在燃烧器改造设计中,注重对主燃烧器分级燃烧的设计优化,采用较大的主燃烧区化学当量比,降低对主燃烧区低化学当量比的依赖度和敏感度,同时采取受热面调整和磨煤机增装动态分离器等配套措施.改造后锅炉总体性能良好,NOx减排幅度达到50%.