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1. 发明申请

US20140230701A1 NATURAL DRAFT LOW SWIRL BURNER 审中-公开
标题翻译：自然式低温燃烧器
公开(公告)号：US20140230701A1
公开(公告)日：2014-08-21
申请号：US14111161
申请日：2012-04-06
申请人： Robert K. Cheng , David Littlejohn
发明人： Robert K. Cheng , David Littlejohn
IPC分类号： F23D14/08 , F23B30/00
CPC分类号： F23D14/08 , F23B5/02 , F23C6/042 , F23C9/00 , F23C2202/10 , F23C2900/06043 , F23C2900/09002 , F23D14/04 , F23D14/64 , F23D2900/14701
摘要： A new design for a low swirl burner is disclosed in which natural draft rather than a motorized pump is used to move a fuel-air mixture through the burner. This new design enables the burn off of gas at refineries in an environment where electric motors cannot be used because of the potential for sparks, which could trigger explosions. Additional modifications to the burner, including the introduction of flue gas to the burner allows for the reduction of NOx gas to meet current emission control targets, without the need for further post combustion emission control systems.
摘要翻译：公开了一种用于低涡流燃烧器的新设计，其中使用自然通风而不是电动泵来使燃料 - 空气混合物通过燃烧器移动。这种新设计使得在电动机不能使用的环境中，在炼油厂燃烧气体，因为可能引起爆炸的火花。对燃烧器的额外修改，包括将烟气引入燃烧器允许减少NOx气体以满足电流排放控制目标，而不需要进一步的后燃烧排放控制系统。

2. 发明授权

US5735681A Ultralean low swirl burner 失效
标题翻译： Ultralean低旋转燃烧器
公开(公告)号：US5735681A
公开(公告)日：1998-04-07
申请号：US33878
申请日：1993-03-19
申请人： Robert K. Cheng
发明人： Robert K. Cheng
IPC分类号： F23C7/00 , F23D14/02 , F23D14/62 , F23D23/00 , F23R3/14 , F23M3/04
CPC分类号： F23C7/002 , F23D14/02 , F23D14/62 , F23D23/00 , F23R3/14 , F23D2900/14021
摘要： A novel burner and burner method has been invented which burns an ultra lean premixed fuel-air mixture with a stable flame. The inventive burning method results in efficient burning and much lower emissions of pollutants such as oxides of nitrogen than previous burners and burning methods. The inventive method imparts weak swirl (swirl numbers of between about 0.01 to 3.0) on a fuel-air flow stream. The swirl, too small to cause recirculation, causes an annulus region immediately inside the perimeter of the fuel-air flow to rotate in a plane normal to the axial flow. The rotation in turn causes the diameter of the fuel-air flow to increase with concomitant decrease in axial flow velocity. The flame stabilizes where the fuel-air mixture velocity equals the rate of burning resulting in a stable, turbulent flame.
摘要翻译：已经发明了一种新颖的燃烧器和燃烧器方法，其燃烧具有稳定火焰的超稀薄预混合燃料 - 空气混合物。本发明的燃烧方法导致有效的燃烧和比以前的燃烧器和燃烧方法更少的氮氧化物等污染物的排放。本发明的方法在燃料 - 空气流动流上施加弱漩涡（约0.01至3.0之间的涡旋数）。漩涡太小而不能引起再循环，使得紧邻燃料 - 空气流的周边内的环形区域在垂直于轴向流动的平面内旋转。旋转依次导致燃料 - 空气流的直径随轴流速度的降低而增加。火焰稳定在燃料 - 空气混合物速度等于燃烧速率，导致稳定的湍流火焰的地方。

3. 发明授权

US5516280A Apparatus and method for burning a lean, premixed fuel/air mixture with low NOx emission 失效
标题翻译：用于燃烧具有低NOx排放的贫燃混合燃料/空气混合物的装置和方法
公开(公告)号：US5516280A
公开(公告)日：1996-05-14
申请号：US147380
申请日：1993-11-03
申请人： Larry W. Kostiuk , Robert K. Cheng
发明人： Larry W. Kostiuk , Robert K. Cheng
IPC分类号： F23D14/74 , F23D14/46
CPC分类号： F23D14/74
摘要： An apparatus for enabling a burner to stably burn a lean fuel/air mixture. The burner directs the lean fuel/air mixture in a stream. The apparatus comprises an annular flame stabilizer; and a device for mounting the flame stabilizer in the fuel/air mixture stream. The burner may include a body having an internal bore, in which case, the annular flame stabilizer is shaped to conform to the cross-sectional shape of the bore, is spaced from the bore by a distance greater than about 0.5 mm, and the mounting device mounts the flame stabilizer in the bore. An apparatus for burning a gaseous fuel with low NOx emissions comprises a device for premixing air with the fuel to provide a lean fuel/air mixture; a nozzle having an internal bore through which the lean fuel/air mixture passes in a stream; and a flame stabilizer mounted in the stream of the lean fuel/air mixture. The flame stabilizer may be mounted in the internal bore, in which case, it is shaped and is spaced from the bore as just described. In a method of burning a lean fuel/air mixture, a lean fuel/air mixture is provided, and is directed in a stream; an annular eddy is created in the stream of the lean fuel/air mixture; and the lean fuel/air mixture is ignited at the eddy.
摘要翻译：一种用于使燃烧器稳定地燃烧贫燃料/空气混合物的装置。燃烧器将贫燃料/空气混合物引导到流中。该装置包括环形火焰稳定器; 以及用于将火焰稳定器安装在燃料/空气混合物流中的装置。燃烧器可以包括具有内孔的本体，在这种情况下，环形火焰稳定器成形为符合孔的横截面形状，与孔间隔大于约0.5mm的距离，并且安装装置将火焰稳定器安装在孔中。用于燃烧具有低NOx排放的气体燃料的设备包括用于与燃料预混合空气以提供贫燃料/空气混合物的装置; 喷嘴，其具有内部空气孔，贫燃料/空气混合物通过该内部孔流入流中; 和安装在贫燃料/空气混合物流中的火焰稳定器。火焰稳定器可以安装在内孔中，在这种情况下，其形状如上所述与孔的间隔开。在燃烧贫燃料/空气混合物的方法中，提供贫燃料/空气混合物，并将其导入流中; 在贫燃料/空气混合物流中产生环形涡流; 而稀燃料/空气混合物在涡流点燃。

4. 发明授权

US5879148A Mechanical swirler for a low-NO.sub.x, weak-swirl burner 失效
标题翻译：机械旋流器用于低NOx，弱漩涡燃烧器
公开(公告)号：US5879148A
公开(公告)日：1999-03-09
申请号：US837377
申请日：1997-04-16
申请人： Robert K. Cheng , Derek T. Yegian
发明人： Robert K. Cheng , Derek T. Yegian
IPC分类号： F23C7/00 , F23D14/02 , F23D14/62 , F23D23/00 , F23R3/14
CPC分类号： F23C7/002 , F23D14/02 , F23D14/62 , F23D23/00 , F23R3/14 , F23D2900/14021
摘要： Disclosed is a mechanical swirler for generating diverging flow in lean premixed fuel burners. The swirler of the present invention includes a central passage with an entrance for accepting a feed gas, a flow balancing insert that introduces additional pressure drop beyond that occurring in the central passage in the absence of the flow balancing insert, and an exit aligned to direct the feed gas into a combustor. The swirler also has an annular passage about the central passage and including one or more vanes oriented to impart angular momentum to feed gas exiting the annular passage. The diverging flow generated by the swirler stabilizes lean combustion thus allowing for lower production of pollutants, particularly oxides of nitrogen.
摘要翻译：公开了一种用于在贫预混合燃料燃烧器中产生分流的机械旋流器。本发明的旋流器包括具有用于接收进料气体的入口的中心通道，流动平衡插入件，其引入超过在没有流动平衡插入件的情况下在中心通道中出现的额外的压降，以及排出器进料气体进入燃烧器。旋流器还具有围绕中心通道的环形通道，并且包括一个或多个叶片，其被定向以赋予角动量以输送离开环形通道的气体。由旋流器产生的分流可稳定稀燃，从而允许较低的污染物生产，特别是氮氧化物的产生。

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