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公开(公告)号：US09719677B2
公开(公告)日：2017-08-01
申请号：US14357733
申请日：2013-01-15
发明人： Yuankai Deng , Yonghe Zhang , Ming Li , Bo Hou , Jinlei Cui , Tanrong Wei , Weiguo Rong , Lei Li , Guofeng Xu
摘要： The present invention relates to a pulverized coal fired boiler with wall-attachment secondary air and grid overfire air. Primary burners including primary air spouts, secondary air spouts and close coupled overfire air spouts arranged at intervals along the height direction of a hearth are arranged on four corners of the hearth. Two-way wall-attachment secondary air spouts and one-way wall-attachment secondary air spouts are arranged from bottom to top in a primary combustion zone where the primary burners are located. One-way wall-attachment secondary air spouts are arranged in a reduction zone between the primary burners and the top overfire air spouts, and grid overfire air spouts are arranged in a burnout zone where the overfire air is supplied. By adopting the pulverized coal fired boiler with wall-attachment secondary air and grid overfire air according to the present invention, the NO amount generated in the hearth is reduced, the NO reduction rate along a flame is improved, the coke burnout rate is improved, less coke which is not burnt out enters into the burnout zone, slagging on the water-cooled wall is reduced, and ultralow emission of NOx may be realized on the premise that the combustion efficiency is not reduced, slag is not agglomerated in the hearth and the flue gas temperature deviation is small.
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2.发明申请PULVERIZED COAL FIRED BOILER WITH WALL-ATTACHMENT SECONDARY AIR AND GRID OVERFIRE AIR 有权具有壁挂式二次空气和网状空气的粉煤燃烧锅炉公开(公告)号：US20140308620A1
公开(公告)日：2014-10-16
申请号：US14357733
申请日：2013-01-15
发明人： Yuankai Deng , Yonghe Zhang , Ming Li , Bo Hou , Jinlei Cui , Tanrong Wei , Weiguo Rong , Lei Li , Guofeng Xu
摘要： The present invention relates to a pulverized coal fired boiler with wall-attachment secondary air and grid overfire air. Primary burners including primary air spouts, secondary air spouts and close coupled overfire air spouts arranged at intervals along the height direction of a hearth are arranged on four corners of the hearth. Two-way wall-attachment secondary air spouts and one-way wall-attachment secondary air spouts are arranged from bottom to top in a primary combustion zone where the primary burners are located. One-way wall-attachment secondary air spouts are arranged in a reduction zone between the primary burners and the top overfire air spouts, and grid overfire air spouts are arranged in a burnout zone where the overfire air is supplied. By adopting the pulverized coal fired boiler with wall-attachment secondary air and grid overfire air according to the present invention, the NO amount generated in the hearth is reduced, the NO reduction rate along a flame is improved, the coke burnout rate is improved, less coke which is not burnt out enters into the burnout zone, slagging on the water-cooled wall is reduced, and ultralow emission of NOx may be realized on the premise that the combustion efficiency is not reduced, slag is not agglomerated in the hearth and the flue gas temperature deviation is small.
摘要翻译： 本发明涉及具有壁挂式二次空气和格栅过火空气的粉煤燃烧锅炉。 在炉膛的四个角落处设置主要燃烧器，包括一次空气喷口，二次空气喷口和沿着炉膛的高度方向间隔设置的紧密耦合的过火空气喷口。 在主要燃烧器所在的主要燃烧区域中，从底部到顶部布置了双向壁挂式辅助空气喷口和单向壁挂辅助空气喷口。 单向壁挂式二次空气喷口布置在主燃烧器和顶部过火空气喷口之间的减压区域中，并且格栅过火空气喷口布置在燃烧空气供应的燃尽区域中。 通过采用本发明的具有壁挂二次空气和格栅过火空气的粉煤锅炉，炉壁产生的NO量降低，沿着火焰的NO还原率提高，焦炭燃烧率提高， 不燃烧的焦炭进入燃烧区域，减少了水冷壁上的排渣，并且在燃烧效率不降低，炉渣不会凝结的前提下，可以实现NOx的超低排放 烟气温度偏差小。
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