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    Method for in-furnace reduction flue gas acidity
    207.
    发明授权
    Method for in-furnace reduction flue gas acidity 有权
    炉内还原烟气酸度的方法

    公开(公告)号：US08251694B2

    公开(公告)日：2012-08-28

    申请号：US10797513

    申请日：2004-03-10

    Applicant: Brian S. Higgins

    Inventor： Brian S. Higgins

    IPC: E23C11/12 ,  C01B17/16

    CPC classification number: F23L9/04 ,  F23C6/047 ,  F23C2201/101 ,  F23C2201/20 ,  F23C2201/30 ,  F23J2215/20

    Abstract: A method for of reducing the acidity and lowering the acid dewpoint of flue gas, the method steps including partially combusting the fuel in a first stage to create a reducing environment; maintaining the reducing environment for a sufficient time period such that reducible acids are reduced to achieve a desirable acidity concentration in the flue gas; and combusting the remainder of the fuel and combustion intermediates in a second stage with oxidizing environment; thereby decreasing the acidity and lowering the acid dewpoint of the flue gas by reducing the acid concentration of the gas.

    Abstract translation: 一种降低烟气酸度和降低酸性露点的方法，所述方法步骤包括在第一阶段部分地燃烧燃料以产生还原环境; 保持还原环境足够的时间，使得可还原的酸被还原以达到烟道气中所需的酸度浓度; 并在具有氧化环境的第二阶段中燃烧剩余的燃料和燃烧中间体; 从而通过降低气体的酸浓度来降低烟气的酸度和降低酸性露点。

    METHOD FOR REDUCING NITROGEN OXIDE EMISSIONS IN OXYFUEL COMBUSTION
    208.
    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

    IPC: F23L9/00

    CPC classification number: F23C6/045 ,  F23C9/003 ,  F23C10/10 ,  F23C2201/101 ,  F23L7/007 ,  F23L2900/07001 ,  Y02E20/322 ,  Y02E20/344

    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。

    UPSIDE-DOWN TYPE LOW NOX BOILER
    209.
    发明申请
    UPSIDE-DOWN TYPE LOW NOX BOILER 有权
    上下式低NOX锅炉

    公开(公告)号：US20110197829A1

    公开(公告)日：2011-08-18

    申请号：US13124989

    申请日：2009-12-08

    Applicant: Nobuo Suemitsu ,  Sadayuki Muto ,  Shinichi Toda ,  Minoru Igarashi

    Inventor： Nobuo Suemitsu ,  Sadayuki Muto ,  Shinichi Toda ,  Minoru Igarashi

    IPC: F22B37/10

    CPC classification number: F23C6/04 ,  F23C5/08 ,  F23C6/045 ,  F23C2201/101 ,  F23G5/165

    Abstract: In a low NOx boiler of the present invention, a high-temperature reductive combustion zone is provided to an upper portion of a rectangular combustion chamber, and a second-step combustion zone is provided to a middle stage of the combustion chamber. A wall provided below the second-step combustion zone is tapered to narrow the combustion chamber, with a taper angle of approximately 35° or so, relative to a vertical line. An ash discharge port is provided to a furnace bottom portion, and a gas outlet port communicated with a rear pass water wall is provided to a lower side face of the second-step combustion zone. This rear pass water wall is connected with a further post-treatment step, via a super-heater tube and an economizer.

    Abstract translation: 在本发明的低NOx锅炉中，向矩形燃烧室的上部设置高温还原燃烧区，在燃烧室的中间部设置第二级燃烧区。 设置在第二阶段燃烧区下方的壁是锥形的，以相对于垂直线大约35°的锥角使燃烧室变窄。 在炉底部设有排灰口，与第二级燃烧区的下侧面设置有与后通水壁连通的排气口。 该后通水壁通过另外的后处理步骤通过超级加热器管和节能器连接。

    SYSTEMS FOR STAGED COMBUSTION OF AIR AND FUEL
    210.
    发明申请
    SYSTEMS FOR STAGED COMBUSTION OF AIR AND FUEL 有权
    用于燃烧空气和燃料的系统

    公开(公告)号：US20100212556A1

    公开(公告)日：2010-08-26

    申请号：US12389995

    申请日：2009-02-20

    Applicant: Larry William Swanson ,  Roy Payne ,  Quang H. Nguyen

    Inventor： Larry William Swanson ,  Roy Payne ,  Quang H. Nguyen

    IPC: F23J15/00 ,  F23C6/04 ,  F23L9/00 ,  F23N1/00

    CPC classification number: F23C6/045 ,  F23C2201/101 ,  F23C2900/06041 ,  F23L9/02

    Abstract: A combustion system for combusting air and fuel includes a primary combustion zone configured to produce combustion gases from the air and the fuel and an intermediate air zone downstream from the primary combustion zone. The intermediate air zone is configured to inject an intermediate air stream into the combustion gases. The combustion system further includes a burnout zone downstream from the intermediate air zone, wherein the burnout zone is configured to inject an overfire air stream into the combustion gases, and at least one hybrid-boosted air injector within at least one of the intermediate air zone and the burnout zone. The at least one hybrid-boosted air injector is configured to substantially simultaneously inject a boosted air stream and a windbox air stream into the combustion gases.

    Abstract translation: 用于燃烧空气和燃料的燃烧系统包括被配置为从空气和燃料产生燃烧气体的初级燃烧区域和从主燃烧区域下游的中间空气区域。 中间空气区域构造成将中间气流注入到燃烧气体中。 燃烧系统还包括在中间空气区域下游的燃烧区域，其中燃烧区域被配置为将过量空气流喷射到燃烧气体中，以及在至少一个中间空气区域内的至少一个混合增压空气喷射器 和倦怠区。 所述至少一个混合增压空气喷射器构造成基本上同时将增压空气流和风箱气流注入到燃烧气体中。

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