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    • 6. 发明授权
    • Exhaust gas recirculation apparatus
    • 废气再循环装置
    • US4277942A
    • 1981-07-14
    • US16079
    • 1979-02-28
    • Rolf A. EgnellBengt L. Hansson
    • Rolf A. EgnellBengt L. Hansson
    • F02G1/055F23C7/06F23C9/00F23C9/08F02G1/04F23C9/02
    • F23C7/06F02G1/055F23C9/08F02G2254/60F23C2900/06041F23C2900/09002
    • Apparatus for recirculating combustion exhaust gases to the burner region of a Stirling cycle hot-gas engine to lower combustion temperature and reduct NO.sub.x formation includes a first wall separating the exhaust gas stream from the inlet air stream, a second wall separating the exhaust gas stream from the burner region, and low flow resistance ejectors formed in the first and second walls for admitting the inlet air to the burner region and for entraining and mixing with the inlet air portion of the exhaust gas stream. In a preferred embodiment the ejectors are arranged around the periphery of a cylindrical burner region and oriented to admit the air/exhaust gas mixture tangentially to promote mixing. In another preferred embodiment a single annular ejector surrounds and feeds the air/exhaust gas mixture to a cylindrical burner region. The annular ejector includes an annular plate with radially-directed flow passages to provide an even distribution of the air/exhaust gas mixture to the burner region.
    • 用于将燃烧废气再循环到斯特林循环热燃气发动机的燃烧器区域以降低燃烧温度并还原NOx形成的装置包括将废气流与入口气流分离的第一壁,将废气流从 燃烧器区域和形成在第一和第二壁中的低阻力喷射器,用于将入口空气引入燃烧器区域,并与排气流的入口空气部分进行夹带和混合。 在优选实施例中,喷射器围绕圆柱形燃烧器区域的周边布置并且被定向成相互接近地允许空气/废气混合物以促进混合。 在另一个优选实施例中,单个环形喷射器围绕并将空气/废气混合物供给到圆柱形燃烧器区域。 环形喷射器包括具有径向流动通道的环形板,以提供空气/废气混合物到燃烧器区域的均匀分布。
    • 7. 发明授权
    • Reduction of pollutants in gaseous hydrocarbon combustion products
    • 减少气态碳氢化合物燃烧产物中的污染物
    • US3885903A
    • 1975-05-27
    • US30213372
    • 1972-10-30
    • AQUA CHEM INC
    • LA HAYE PAUL G
    • F23C99/00F23C6/00F23C6/04F23C11/00F23C9/02
    • F23C6/04F23C6/00
    • Fuel and less than the amount of air for stoichiometric combustion are injected into a combustion chamber so that the fuel rich mixture burns as a core in the combustion chamber. The balance of the air for substantially stoichiometric combustion is injected coaxially and rotationally as a sheath or vortex which surrounds the core. Where the core is hot and rich, there is little mixing of the sheath air and core gases and the available oxygen combines preferentially with fuel components other than nitrogen so that little nitrogen oxides are produced. After some heat is extracted from the gases in the core, more complete mixing of the sheath air and core gases occurs. Under these lean and cool combustion conditions, production of nitrogen oxides is also unsubstantial. Means for mixing the gas streams may be disposed adjacent the exit end of the combustion chamber when necessary to promote turbulence and further mixing of the air and hot gases for bringing about complete combustion of any residual combustibles. In the larger combustion systems within long furnaces means of promoting turbulence may not be required to complete combustion.
    • 将燃料和小于化学计量燃烧的空气量注入燃烧室,使得富燃料混合物在燃烧室中燃烧为核心。 用于基本上化学计量燃烧的空气的平衡被同轴地和旋转地注射为包围芯的鞘或涡流。 在核心是热和富的情况下,鞘空气和核心气体几乎没有混合,并且可用的氧气优先与除了氮气之外的燃料组分结合,使得产生少量的氮氧化物。 在芯中的气体中提取一些热量后,会发生鞘气和核心气体的更完全混合。 在这些贫冷的燃烧条件下,氮氧化物的生产也是不实质的。 当需要混合气流的装置可以设置在燃烧室的出口端附近,以促进湍流并进一步混合空气和热气体,以使任何残留的可燃物完全燃烧。 在长炉内的较大的燃烧系统中,促进湍流的手段可能不需要完成燃烧。