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    • 9. 发明申请
    • METHOD FOR DECREASING NITROGEN OXIDES OF A PULVERIZED COAL BOILER USING BURNERS OF INTERNAL COMBUSTION TYPE
    • 使用内燃机燃烧器减少燃烧煤锅炉的氮氧化物的方法
    • US20110033807A1
    • 2011-02-10
    • US12921658
    • 2008-06-18
    • Yupeng WangHong TangYuwang MiaoTao NiuHuaijun MaPeng LiuXinguang WangXiaoyong ZhangYubin ZhangChaoqun ZhangYongsheng DongXingyuan Cui
    • Yupeng WangHong TangYuwang MiaoTao NiuHuaijun MaPeng LiuXinguang WangXiaoyong ZhangYubin ZhangChaoqun ZhangYongsheng DongXingyuan Cui
    • F23M3/04
    • F23D1/00F23C5/08F23C6/04F23C2201/101F23C2900/03005F23D2201/10F23D2201/20
    • A method for decreasing nitrogen oxides of a pulverized coal boiler using burners (2) of internal combustion type comprising: designing or changing all or part of burners of the pulverized coal boiler as internal combustion type burners (2), in which the ignition sources may be plasma generators (1) or ignition devices such as small oil guns etc., and the power thereof can be adjusted for controlling the ignition intensity in the burners (2). The burners (2) are interiorly divided into several stage combustion chambers (5) and are provided with pulverized coal concentrators (4) which do deep fuel staging in the burners (2). During the operation of the boiler, the ignition sources always keep in a working state, and the pulverized coal in the burners (2) is ignited stage by stage and is burnt in advance; decreasing the secondary air amount in the primary combustion zone (22) so that the primary combustion zone (22) is in a relatively strong reducing atmosphere and a high temperature and oxygen-deficient condition for inhibiting the generation of NOx is created; and supplying the remaining air from the upper of furnace of the boiler in the form of over-fire air, so that a deep air staging is carried out in the total furnace. Thus, the NOx generation of combustion can be effectively controlled on the premise of not decreasing the boiler efficiency.
    • 一种使用内燃式燃烧器(2)减少粉煤锅炉的氮氧化物的方法,包括:设计或改变作为内燃式燃烧器(2)的粉煤锅炉的全部或部分燃烧器,其中点火源可以 等离子体发生器(1)或小型油枪等点火装置,并且其功率可以被调节以控制燃烧器(2)中的点火强度。 燃烧器(2)内部分为几级燃烧室(5),并设置有在燃烧器(2)中进行深度燃料分级的粉煤集中器(4)。 在锅炉运行期间,点火源始终处于工作状态,燃烧器(2)中的粉煤逐级点火,并预先燃烧; 减少主燃烧区(22)中的二次空气量,使得第一燃烧区(22)处于相对较强的还原气氛中,并且产生用于抑制NOx的产生的高温和缺氧条件; 并且以过火空气的形式从锅炉的上部供应剩余的空气,使得在整个炉中进行深空气分级。 因此,在不降低锅炉效率的前提下,能够有效地控制NOx的产生。