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    • 19. 发明申请
    • Dense/Dilute Pulverized Coal Separator Structure of Single-fireball Octagonal Direct-flow Burner
    • 密封/稀释粉煤分离器单火焰八边形直流燃烧器结构
    • US20140038115A1
    • 2014-02-06
    • US13808121
    • 2012-02-16
    • Fei ChenJianwen ZhangKun XiaoJiangtao Li
    • Fei ChenJianwen ZhangKun XiaoJiangtao Li
    • F23C5/28F22B21/34F23D1/00F23K1/00
    • F23C5/28F22B21/34F23C5/32F23D1/00F23D1/005F23K1/00F23L9/02
    • The invention discloses a dense/dilute pulverized coal separator structure of a single-fireball octagonal direct-flow burner, of which a boiler body is provided with eight burner groups, each water cooled wall is provided with two burner groups respectively, each of the burner groups comprises multiple nozzles toward the same burner, and center lines of all nozzles on the eight burner groups form an imaginary tangent circle in a furnace along the same tangential direction. In the dense/dilute pulverized coal separator structure, eight burner groups are arranged on four water cooled walls of the boiler, thus increasing pulverized coal concentration of a pulverized rich coal area, allowing wall heat load qHr of a lower burner area to be higher, allowing burning temperature of the area to meet requirements for anthracite burning stability, shortening distance of jet flow from a nozzle outlet to downstream adjacent air flow, being capable of using lower primary pulverized coal air flow velocity, enhancing heat flow intensity at the nozzle outlet, improving convection and radiation heat transfer capacity, and ensuring timely ignition of pulverized anthracite air flow and stable burning of the boiler at low load without oil.
    • 本发明公开了一种单火焰八边形直流燃烧器的致密/稀释粉煤分离器结构,其锅炉体设有八个燃烧器组,每个水冷壁分别设有两个燃烧器组,每个燃烧器 组包括朝向相同燃烧器的多个喷嘴,并且八个燃烧器组上的所有喷嘴的中心线在炉中沿相同切向方向形成假想切圆。 在致密/稀释的粉煤分离器结构中,锅炉的四个水冷壁上布置了八个燃烧器组,从而提高了富煤煤层的粉煤浓度,使下燃烧器面积的壁热负荷qHr更高, 使得该区域的燃烧温度满足无烟煤燃烧稳定性的要求,缩短从喷嘴出口到下游相邻气流的喷流的距离,能够使用较低的初级粉煤气流速度,增强喷嘴出口处的热流强度, 提高对流和辐射传热能力,确保煤粉无烟煤气流的及时点火,锅炉低负荷无油燃烧。