融合烟气回流可控技术的低氮燃烧器冷态模化测试

Cold Modeling Tests on Low NO_x Burner Fused Controlled Vortex of Flue Gas

某电厂2号贫煤锅炉为了适应低排放和掺烧烟煤的要求,在技术改造中采用了新型的融合烟气回流可控技术的低氮燃烧器,对新型燃烧器进行全面冷态特性测试和炉内等温模化试验。结果表明:该燃烧器的二次风(包括SOFA)挡板线性度能较好满足燃烧调整的需要,浓、淡侧的喷口风速偏差较大,烟气回流区域的大小与回流控制门的开度基本呈负相关的线性关系,炉内空气动力状况良好,通过测试较好地掌握了新型燃烧器的冷态特性,为锅炉热态燃烧调整和安全经济运行提供技术指导。

A new-type low-NOx buner fused flue gas vortex controlled is used in technical reformation on the NO.2 boiler in certain power plant for low-NOx exhausting and mixed-burning bituminous coal. A full-scale cold isothermal modeling test has been performed. The results show that： the degree of linearity of secondary air （including SOFA） dampers opening and secondary air velocity is high enough to organizing combustion in boiler; there is a big difference between rich and lean fuel flow velocity; the flue gas vortex area and the vortex controlled damper opening is negative linear relation; the aerodynamic condition is reasonable etc. Cold characteristics of the new-type burner have been obtained. Hopefully this will provide technical guide for combustion adjustment and for safe and economic operating.