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    • 1. 发明申请
    • Solid fuel burner, burning method using the same, combustion apparatus and method of operating the combustion apparatus
    • 固体燃料燃烧器,使用其的燃烧方法,燃烧装置和操作燃烧装置的方法
    • US20040211345A1
    • 2004-10-28
    • US10292694
    • 2002-11-13
    • Hitachi, Ltd.Babcock-Hitachi K.K.
    • Hirofumi OkazakiMasayuki TanaiguchiToshikazu TsumuraYoshitaka TakahashiKouji Kuramashi
    • F23C001/10F23D001/00
    • F23C6/045F23C7/004F23C7/008F23C2201/20F23C2900/06041F23D1/00F23D2201/10F23D2201/20F23D2209/20
    • A solid fuel burner using a low oxygen concentration gas as a transporting gas of a low grade solid fuel such as brown coal or the like and a combustion method using the solid fuel burner are provided. The solid fuel burner comprises a means for accelerating ignition of the fuel and a means for preventing slugging caused by combustion ash from occurring. Mixing of fuel and air inside a fuel nozzle 11 is accelerated by that an additional air nozzle 12 and a separator 35 for separating a flow passage are arranged in the fuel nozzle 11, and the exit of the additional air nozzle 12 is set at a position so as to overlap with the separator 35 when seeing from a direction perpendicular to a burner axis, and additional air is ejected in a direction nearly perpendicular to a flow direction of a fuel jet flowing through the fuel nozzle 11. An amount of air from the additional air nozzle 12 is varied corresponding to a combustion load. By increasing the amount of air from the additional air nozzle 12 at a low load operation, an oxygen concentration of a circulation flow 19 formed in a downstream portion outside the exit of the fuel nozzle 11 is increased to stably burn the fuel. By decreasing the amount of air from the additional air nozzle 12 at a high load operation, a flame is formed at a position distant from the fuel nozzle 11 to suppress radiant heat received by structures of the solid fuel burner and walls of the furnace.
    • 提供了使用低氧浓度气体作为低等固体燃料如褐煤等的输送气体的固体燃料燃烧器和使用固体燃料燃烧器的燃烧方法。 固体燃料燃烧器包括用于加速燃料点火的装置和用于防止由燃烧灰发生的堵塞的装置。 燃料喷嘴11内的燃料和空气的混合通过在燃料喷嘴11中设置有附加的空气喷嘴12和用于分离流路的分离器35而加速,并且附加空气喷嘴12的出口被设定在位置 以便当从垂直于燃烧器轴线的方向观察时与分离器35重叠,并且附加空气沿与流过燃料喷嘴11的燃料射流的流动方向几乎垂直的方向喷射。来自 额外的空气喷嘴12对应于燃烧负荷而变化。 通过在低负载运转下增加来自附加空气喷嘴12的空气量,形成在燃料喷嘴11的出口外的下游部分的循环流19的氧浓度增加,以稳定地燃烧燃料。 通过在高负荷运转下减少来自附加空气喷嘴12的空气量,在远离燃料喷嘴11的位置处形成火焰,以抑制由固体燃料燃烧器的结构和炉壁接收的辐射热。
    • 9. 发明申请
    • NOZZLE ASSEMBLY FOR A PULVERIZED COAL BURNER
    • 用于燃烧煤燃烧器的喷嘴组件
    • US20020174810A1
    • 2002-11-28
    • US09864645
    • 2001-05-24
    • Craig A. PentersonRichard J. DubeBonnie Courtemanche
    • F23C001/10
    • F23D1/02F23D2201/10F23D2201/20F23D2209/20
    • A mixture of pulverized coal and primary air travels axially through a tubular nozzle body having an outlet end in and surrounded by axially flowing concentric streams of secondary and often tertiary air. In the nozzle body, the coal/air mixture flows through a venturi that concentrates the coal in a fuel rich central zone. The coal/air mixture then flows through a spreader that imparts a swirling motion to the mixture and divides the mixture into multiple discrete lobes or streams. At the outlet end of the nozzle body, a flame stabilizer ring produces a separation zone between the coal/air mixture exiting the nozzle body and the surrounding flow of secondary air. The flame stabilizer ring includes an outwardly flared skirt section that spreads the secondary air flow and inwardly directed teeth that extend into the streams of coal/air mixture flowing from the nozzle body outlet.
    • 粉煤和一次空气的混合物轴向地通过管状喷嘴体,该管状喷嘴体的出口端在第二和常规三次空气的轴向流动的同心流中包围。 在喷嘴体中,煤/空气混合物流经文丘里管,其将煤浓缩在富含燃料的中心区域中。 煤/空气混合物然后流过扩张器,其向混合物施加旋转运动,并将混合物分成多个不连续的叶或流。 在喷嘴体的出口端,火焰稳定器环在离开喷嘴体的煤/空气混合物和周围的二次空气流之间产生分离区。 火焰稳定器环包括向外扩张的裙部,其扩展二次空气流和向内指向的齿,其延伸到从喷嘴体出口流动的煤/空气混合物流中。