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3. 发明授权

US5511974A Ceramic foam low emissions burner for natural gas-fired residential appliances 失效
标题翻译：陶瓷泡沫低排放燃烧器用于天然气家用电器
公开(公告)号：US5511974A
公开(公告)日：1996-04-30
申请号：US326915
申请日：1994-10-21
申请人： Michael W. Gordon , Mikhail Zlatkin , Kurt A. Bauer , Kurt D. Oswald
发明人： Michael W. Gordon , Mikhail Zlatkin , Kurt A. Bauer , Kurt D. Oswald
IPC分类号： F23D14/02 , F23D14/16 , F23D14/14
CPC分类号： F23D14/02 , F23D14/16 , F23D2203/102 , F23D2203/105 , F23D2203/1055 , F23D2212/101
摘要： An atmospheric reticulated ceramic foam burner which is retrofittable into existing residential heat exchanger designs has been developed to reduce NO.sub.x and CO emissions. It is operated in a blue flame or substantially radiant mode. The ceramic foam tile used is a three dimensional, web-like structure composed of ceramic struts and voids (or pores) which is permeable and rigid and can withstand the high temperatures found in domestic burners. The foam tile is positioned over a manifold, and is the outlet for the manifold. The manifold inlet is a venturi so that incoming gas is mixed with air in the correct range of proportions before passing through the foam. The pressures used, relative to tile porosity, are such that the gas-air mixture does not burn until it has passed all the way through the foam tile, resulting in a flame above the tile. Additional quantities of (secondary) air can be introduced around the burner to mix and burnout the products of combustion. Thus, by the time of burning, the air-gas mixture has been thoroughly mixed so that the flame can provide complete combustion, thus reducing emissions.In one modification of the invention one or more screens can be placed over the outlet of the foam tiles. In another modification, a series of holes pass through the tiles. Both modifications serve to further mix the air and gas before combustion.
摘要翻译：已经开发了可改造成现有住宅热交换器设计的大气网状陶瓷泡沫燃烧器，以减少NOx和CO排放。它以蓝色火焰或基本辐射模式操作。使用的陶瓷泡沫砖是由陶瓷支柱和空隙（或孔）组成的三维网状结构，其是可渗透和刚性的并且能够承受家用燃烧器中发现的高温。泡沫砖位于歧管上方，并且是歧管的出口。歧管入口是文氏管，使得进入的气体在通过泡沫之前以正确的比例范围与空气混合。使用的压力相对于瓷砖孔隙度使得气体 - 空气混合物在其一直通过泡沫砖之前不燃烧，导致瓦上方的火焰。可以在燃烧器周围引入额外的（次要）空气以混合和燃烧燃烧产物。因此，在燃烧时，气体混合物已经充分混合，使得火焰能够提供完全的燃烧，从而减少排放。在本发明的一个修改中，可以在泡沫砖的出口上方放置一个或多个筛网。在另一个修改中，一系列的孔穿过瓦片。两种改性均用于在燃烧之前进一步混合空气和气体。

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