Combined fluidized bed and pulverized coal combustion method
    1.
    发明授权
    Combined fluidized bed and pulverized coal combustion method 失效
    联合流化床和粉煤燃烧法

    公开(公告)号:US07004089B2

    公开(公告)日:2006-02-28

    申请号:US10476684

    申请日:2001-05-11

    IPC分类号: F23G5/30 F23D1/00

    摘要: The invention relates to a combined fluidized bed and pulverized coal combustion method and system. In the method, fluidizing air (4) is injected into a fluidized bed (2) situated in the bottom portion of the combustion chamber (3). Into the combustion chamber, to above the fluidized bed (2), is fed a mixture of pulverized coal and a carrier gas from a second set of fuel feed means (6) at a mass flow rate which is higher or at least substantially equal to the upper ignition limit of the mixture, and the mixture of the pulverized coal and the carrier gas at least by the fluidizing air (4), and at least a fraction of the fuel fed via the second set of fuel feed means (6) is combusted above the fluidized bed (2).

    摘要翻译: 本发明涉及一种组合流化床和粉煤燃烧方法及系统。 在该方法中,将流化空气(4)注入位于燃烧室(3)底部的流化床(2)中。 在燃烧室内到达流化床(2)的上方,以来自第二组燃料供给装置(6)的粉煤和载气的混合物以更高或至少基本上等于 至少通过流化空气(4),混合物的上限点火极限和粉煤与载体气体的混合物,以及经由第二组燃料供给装置(6)供给的燃料的至少一部分是 在流化床(2)上方燃烧。

    Method and apparatus for reducing nitrogen oxide emissions from burning
pulverized fuel
    2.
    发明授权
    Method and apparatus for reducing nitrogen oxide emissions from burning pulverized fuel 失效
    用于减少燃烧粉煤燃料的氮氧化物排放的方法和装置

    公开(公告)号:US5799594A

    公开(公告)日:1998-09-01

    申请号:US637777

    申请日:1996-05-02

    CPC分类号: F23C9/006 F23D1/00

    摘要: Method for combusting pulverized fuels in a tangentially fired boiler and reducing emission of nitrogen oxides comprises steps of feeding a substantially air-deficient mixture of fuel and primary air through a fuel feeding pipe (1) tangentially into a furnace of the boiler in order to form a reducing flame (II) aNd blowing of at least one stream of combustion air into the furnace. The invEntion is based in that the stream of primary air and fuel is caused to recirculate and turbulate at the open end (2) of the fuel feeding pipe (1) by passing it through a flame holder (9) extending into the fuel feeding pipe (1), and the stream of combustion air is directed away from the primary air/fuel stream in order to prevent the combustion air to mix into the reducing flame (II).

    摘要翻译: PCT No.PCT / FI93 / 00461 Sec。 371日期:1996年5月2日 102(e)日期1996年5月2日PCT提交1993年11月8日PCT公布。 WO95 / 13502 PCT公开号 日期1995年5月18日在切向燃烧的锅炉中燃烧粉碎燃料并减少氮氧化物排放的方法包括以下步骤:将基本上空气不足的燃料和一次空气的混合物通过燃料供给管(1)切向地送入锅炉 以形成还原火焰(II),将至少一种燃烧空气流吹入炉中。 所述主张的基础在于,使一次空气和燃料流在燃料供给管(1)的开口端(2)处通过使其通过延伸进入燃料供给管的火焰保持器(9)而再次发生和湍流 (1),并且燃烧空气流被引导离开一次空气/燃料流,以防止燃烧空气混入还原火焰(II)中。