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1. 发明授权

US5649529A Low NO.sub.x combustion system for fuel-fired heating appliances 失效
标题翻译：燃油加热设备的低NOx燃烧系统
公开(公告)号：US5649529A
公开(公告)日：1997-07-22
申请号：US542194
申请日：1995-10-12
申请人： Lin-Tao Lu , Larry R. Mullens , Keith M. Grahl
发明人： Lin-Tao Lu , Larry R. Mullens , Keith M. Grahl
IPC分类号： F23M9/06 , F24H3/08 , F24H9/18 , F24H3/00
CPC分类号： F24H3/087 , F23M9/06 , F24H9/1881
摘要： A fuel-fired, forced air, draft induced heating furnace is provided with NOx reduction apparatus associated with a plurality of combustor tubes forming a portion of its heat exchanger structure. In-shot type fuel burners are spaced apart from and face the open inlet ends of horizontal combustion sections of the combustor tubes. The NOx reduction apparatus includes a plurality of metal mesh tubes having diameters substantially less than the internal diameters of the combustion tubes. Each metal mesh tube is coaxially anchored to and telescopingly over the outlet end of one of the burners and extends therefrom coaxially into the associated combustion tube. During burner operation the burner flames injected into the combustor tubes are forced through the mesh tubes which operate to laterally reduce the cross-sections of the flames, increase their axial velocity through the combustor tubes, and substantially diminish the intimate contact of secondary combustion air with the maximum temperature zones of the flames within the combustor tubes.
摘要翻译：燃料燃烧的强制空气，引风加热炉具有与形成其热交换器结构的一部分的多个燃烧器管相关联的NOx还原装置。喷射型燃料燃烧器与燃烧器管的水平燃烧部分的开放入口端相隔开并面对。 NOx还原装置包括多个金属网管，其直径基本上小于燃烧管的内径。每个金属网管同轴地锚固并且可伸缩地在一个燃烧器的出口端上并且从其同轴地延伸到相关联的燃烧管中。在燃烧器操作期间，喷射到燃烧器管中的燃烧器火焰被迫通过网管，其操作以横向减小火焰的横截面，增加其通过燃烧器管的轴向速度，并且基本上减少二次燃烧空气与燃烧器管内火焰的最高温度区。

2. 发明授权

US5370529A Low NO.sub.x combustion system for fuel-fired heating appliances 失效
标题翻译：燃油加热设备的低NOx燃烧系统
公开(公告)号：US5370529A
公开(公告)日：1994-12-06
申请号：US111297
申请日：1993-08-24
申请人： Lin-Tao Lu , Larry R. Mullens , Keith M. Grahl
发明人： Lin-Tao Lu , Larry R. Mullens , Keith M. Grahl
IPC分类号： F23D14/70 , F24H3/06 , F23D14/62 , F24H9/00
CPC分类号： F24H3/065 , F23D14/70 , F23C2900/07022
摘要： A fuel-fired, forced air draft induced heating furnace is provided with NO.sub.x reduction apparatus associated with a plurality of combustor tubes forming a portion of its heat exchanger structure. In-shot type fuel burners are spaced apart from and face the open inlet ends of horizontal combustion sections of the combustor tubes. The NO.sub.x reduction apparatus includes a plurality of metal mesh tubes having diameters substantially less than the internal diameters of the combustion tubes. The mesh tubes are coaxially supported within the combustor tubes, adjacent their inlet ends, by elongated support members longitudinally passing through the mesh tubes and having first ends anchored to the combustor tube inlet ends, and second ends slidably resting on internal side surface portions of the combustor tubes. During burner operation the burner flames injected into the combustor tubes are forced through the mesh tubes which operate to laterally reduce the cross-sections of the flames, increase their axial velocity through the combustor tubes, and substantially diminish the intimate contact of secondary combustion with the maximum temperature zones of the flames within the combustor tubes.
摘要翻译：燃料燃烧的强制通风引风加热炉设置有与形成其热交换器结构的一部分的多个燃烧器管相关联的NOx还原装置。喷射型燃料燃烧器与燃烧器管的水平燃烧部分的开放入口端相隔开并面对。 NOx还原装置包括多个金属网管，其直径基本上小于燃烧管的内径。网管连接在燃烧器管内，靠近其入口端，细长的支撑件纵向通过网管并具有固定到燃烧器管入口端的第一端，第二端可滑动地搁置在燃烧器管的内侧表面部分上燃烧器管。在燃烧器操作期间，喷射到燃烧器管中的燃烧器火焰被迫通过网管，其操作以横向地减小火焰的横截面，增加其通过燃烧器管的轴向速度，并且基本上减少二次燃烧与燃烧器管内火焰的最高温度区。

3. 发明授权

US5146910A NO.sub.X reducing device for fuel-fired heating appliances 失效
标题翻译：用于燃油加热器具的NOX还原装置
公开(公告)号：US5146910A
公开(公告)日：1992-09-15
申请号：US732502
申请日：1991-07-18
申请人： Keith M. Grahl , Larry R. Mullens
发明人： Keith M. Grahl , Larry R. Mullens
IPC分类号： F23M9/06 , F28F13/00 , F28F13/12
CPC分类号： F23M9/06 , F28F13/00 , F28F13/12
摘要： Elongated metal devices are coaxially inserted into, and closely received within, inlet end portions of the heat exchanger combustor tubes of a fuel-fired heating appliance, representatively a forced air heating furnace. The inserted devices function to substantially reduce the NO.sub.x content of the combustion gases ultimately discharged from the furnace by intercepting, dispersing, and thermally quenching the burner flames drawn through the combustor tubes by a draft inducer fan portion of the furnace. Each device is formed by a pair of elongated, generally rectangular slotted metal plate members which are longitudinally overlapped and transversely secured to one another in a manner providing the device with a generally cross-shaped cross section along its length. Elongated slots are formed in the four outer side edges of the device for operational sound reduction purposes. An alternate embodiment of the device is formed by welding together two elongated metal members each having an L-shaped cross section. Due to the cross-sectional configurations of the devices, they perform their NO.sub.x reducing functions without generating an appreciable amount of noise during operation of their associated furnace. The improved furnace is accordingly suitable for indoor residential installations. The devices may also be incorporated in the combustor tubes of other types of fuel-fired heating appliances such as water heaters and boilers.
摘要翻译：细长的金属装置同时插入燃料加热装置的热交换器燃烧器管的入口端部并且紧密地接收在代表性的强制空气加热炉中。插入的装置通过拦截，分散和热淬火通过炉的引风机风扇部分通过燃烧器管抽出的燃烧器火焰来大大降低最终从炉排出的燃烧气体的NOx含量。每个装置由一对细长的大致矩形的开槽的金属板构件形成，这些金属板构件以使其沿其长度具有大致十字形的横截面的方式彼此纵向重叠并横向地固定。细长的槽形成在装置的四个外侧边缘中，用于操作减声目的。该装置的替代实施例通过将两个细长的金属构件焊接在一起形成，每个细长的金属构件均具有L形横截面。由于装置的横截面构造，它们执行其NOx还原功能，而在其相关联的炉子的操作期间不会产生明显的噪声。因此，改进的炉子适用于室内住宅设施。这些装置也可以并入其它类型的燃料加热装置如热水器和锅炉的燃烧器管中。

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