METHOD FOR REDUCING NITROGEN OXIDE EMISSIONS IN OXYFUEL COMBUSTION
    1.
    发明申请
    METHOD FOR REDUCING NITROGEN OXIDE EMISSIONS IN OXYFUEL COMBUSTION 审中-公开
    在氧气燃烧中减少氮氧化物排放的方法

    公开(公告)号:US20120024206A1

    公开(公告)日:2012-02-02

    申请号:US13254660

    申请日:2010-02-08

    Applicant: Mikko Varonen

    Inventor: Mikko Varonen

    Abstract: A method for reducing nitrogen oxide emissions in oxyfuel combustion, which method comprises supplying in a furnace (11) of a circulating fluidised bed boiler (10) at least one primary gas flow (15) and at least one secondary gas flow (16), which both have been produced by mixing oxygen and circulated flue gas together. The oxygen content of the primary gas (15) is adjusted such that a reducing zone (I) is formed at the bottom of the furnace, in which zone nitrogen oxides are reduced to nitrogen. The oxygen content of the secondary gas is adjusted such that above the reducing zone (I) is formed an oxidising zone (II), in which zone combustion is completed.

    Abstract translation: 一种用于降低氧燃料燃烧中的氮氧化物排放的方法,该方法包括在循环流化床锅炉(10)的炉(11)中供应至少一个主气流(15)和至少一个次气流(16), 这两者都是通过将氧气和循环的烟道气混合在一起而产生的。 调整一次气体(15)的氧含量,使得在炉底部形成还原区(I),在该区域中氮氧化物被还原成氮气。 调整二次气体的氧含量,使得在还原区(I)上方形成有氧化区(II),其中完成区域燃烧。

    Method and arrangement for optimising combustion conditions in a fluidised-bed boiler
    2.
    发明授权
    Method and arrangement for optimising combustion conditions in a fluidised-bed boiler 有权
    优化流化床锅炉燃烧条件的方法和装置

    公开(公告)号:US09052106B2

    公开(公告)日:2015-06-09

    申请号:US13390881

    申请日:2010-08-09

    Abstract: A method and an arrangement for optimizing combustion conditions in a fluidized-bed boiler, in which combustion gas is fed at two or more height levels, the first of which is a primary level (P) which is located at the height of a furnace bottom and the second is a secondary level (S) which is located above fuel feed height (F), above which secondary level (S) there can be still other combustion gas feed levels (T, . . . ). At least one combustion gas feed level (P, S, T, . . . ) is fed at different points of the furnace (11) in its horizontal direction with combustion gases having different oxygen contents such that zones of different oxygen content can be formed in the horizontal direction of the furnace (11).

    Abstract translation: 一种用于优化流化床锅炉中的燃烧条件的方法和装置,其中燃烧气体以两个或更多个高度水平进给,其中第一个是位于炉底高度的初级(P) 第二是位于燃料供给高度(F)之上的次级(S),高于该次级(S)可以是其他燃烧气体供给水平(T ...)。 至少一个燃烧气体供给水平(P,S,T ...)在炉子(11)的不同点处沿其水平方向与具有不同氧含量的燃烧气体一起进料,使得可以形成不同氧含量的区域 在炉(11)的水平方向上。

    METHOD AND ARRANGEMENT FOR OPTIMISING COMBUSTION CONDITIONS IN A FLUIDISED-BED BOILER
    3.
    发明申请
    METHOD AND ARRANGEMENT FOR OPTIMISING COMBUSTION CONDITIONS IN A FLUIDISED-BED BOILER 有权
    流化床锅炉优化燃烧条件的方法和装置

    公开(公告)号:US20120148961A1

    公开(公告)日:2012-06-14

    申请号:US13390881

    申请日:2010-08-09

    Abstract: A method and an arrangement for optimising combustion conditions in a fluidised-bed boiler, in which combustion gas is fed at two or more height levels, the first of which is a primary level (P) which is located at the height of a furnace bottom and the second is a secondary level (S) which is located above fuel feed height (F), above which secondary level (S) there can be still other combustion gas feed levels (T, . . . ). At least one combustion gas feed level (P, S, T, . . . ) is fed at different points of the furnace (11) in its horizontal direction with combustion gases having different oxygen contents such that zones of different oxygen content can be formed in the horizontal direction of the furnace (11).

    Abstract translation: 一种用于优化流化床锅炉中的燃烧条件的方法和装置,其中燃烧气体以两个或更多个高度水平进给,其中第一个是主要水平(P),其位于炉底的高度 第二是位于燃料供给高度(F)之上的次级(S),高于该次级(S)可以是其他燃烧气体供给水平(T ...)。 至少一个燃烧气体供给水平(P,S,T ...)在炉子(11)的不同点处沿其水平方向与具有不同氧含量的燃烧气体一起进料,使得可以形成不同氧含量的区域 在炉(11)的水平方向上。

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