公开(公告)号：US5694869A

公开(公告)日：1997-12-09

申请号：US365853

申请日：1994-12-29

申请人： Bernard P. Breen ,  John P. Bionda, Jr. ,  James E. Gabrielson ,  Anthony Hallo ,  John M. Koltick, Jr.

发明人： Bernard P. Breen ,  John P. Bionda, Jr. ,  James E. Gabrielson ,  Anthony Hallo ,  John M. Koltick, Jr.

IPC分类号： F23C6/04 ,  F23J11/00

CPC分类号： F23C6/045 ,  F23C2201/10

摘要： An improved method and apparatus for supplying combustion air in a roof-fired furnace. Part of the combustion air, overfire air, enters through the roof of a roof-fired furnace at positions separate from the coal burners. The separated entry of overfire air ensures that the initial stages of combustion occur in a fuel-rich environment. A fuel-rich environment during the early stages of combustion favors the formation of molecular nitrogen and disfavors the formation of nitrogen oxides during combustion. The overfire air flows roughly parallel to the flow of combustion products emanating from the coal burners. The overfire air can be angled by vanes either slightly towards or slightly away from the combustion products, depending on how long combustion needs to be retarded in order to inhibit the formation of nitrogen oxides.

摘要翻译： 一种用于在屋顶燃烧炉中供应燃烧空气的改进方法和装置。 燃烧空气的一部分，超燃空气通过屋顶燃烧炉的屋顶进入与煤燃烧器分开的位置。 超燃空气的分离进入确保了燃料的初始阶段在富燃料环境中发生。 在燃烧早期阶段，富含燃料的环境有利于分子氮的形成，并且在燃烧过程中不利于氮氧化物的形成。 过火空气大致平行于从燃煤机发出的燃烧产物的流动。 过热空气可以通过稍微朝向或稍微远离燃烧产物的叶片成角度，这取决于为了抑制氮氧化物的形成而需要延迟燃烧。