公开(公告)号：US06258336B1

公开(公告)日：2001-07-10

申请号：US09276910

申请日：1999-03-26

申请人： Bernard P. Breen ,  Harjit S. Hura

发明人： Bernard P. Breen ,  Harjit S. Hura

IPC分类号： C01B2120

CPC分类号： B01D53/56 ,  B01D53/79 ,  F23C6/047 ,  F23C2201/101 ,  F23C2201/301 ,  F23J7/00

摘要： In a furnace having a primary combustion zone for combustion of a fuel and oxidant, an in-furnace method for reducing nitrogen oxides in combustion products generated in the primary combustion zone in which at least one fluid fuel selected from the group consisting of natural gas, hydrogen, CxHy compounds, CxHyOz compounds and mixtures thereof in an amount in a range of about 2.0% to about 25% of a total heat input to the furnace and at least one nitrogenous compound selected from the group consisting of ammonia, amines, urea, cyanuric acid and mixtures thereof are injected into the furnace downstream of the primary combustion zone, forming an overall fuel-lean NOx-reduction zone.

摘要翻译： 在具有用于燃烧和氧化剂燃烧的初级燃烧区的炉子中，用于还原在主燃烧区产生的燃烧产物中的氮氧化物的炉内方法，其中至少一种选自天然气， 氢，C x H y化合物，C x H y O z化合物及其混合物，其量为输入炉内总热量的约2.0％至约25％，以及至少一种选自氨，胺，脲， 将氰尿酸及其混合物注入到主燃烧区下游的炉中，形成总体贫燃氮氧化物还原区。

公开(公告)号：US5908003A

公开(公告)日：1999-06-01

申请号：US908824

申请日：1997-08-08

申请人： Harjit S. Hura ,  Bernard P. Breen

发明人： Harjit S. Hura ,  Bernard P. Breen

IPC分类号： F23C1/12 ,  F23C6/04 ,  F23L7/00 ,  F23N5/00 ,  F23J11/00 ,  F23B5/00 ,  F23D1/00 ,  F23L1/00

CPC分类号： F23N5/006 ,  F23C1/12 ,  F23C6/047 ,  F23L7/00 ,  F23C2201/101 ,  F23C2201/301 ,  F23C2202/20 ,  F23N2037/08

摘要： A process and apparatus for combustion of a solid carbonaceous material, for example coal, in which a mixture of the solid carbonaceous material and combustion air is injected into a combustion chamber and ignited, thereby forming a fuel-lean primary combustion zone. A gaseous fuel is injected into the combustion chamber in a region downstream of the primary combustion zone, thereby forming a fuel-lean secondary combustion zone. Temperature in the secondary combustion zone is in the range of about 1800.degree. F. to 2400.degree. F.

摘要翻译： 用于燃烧固体碳质材料（例如煤）的方法和装置，其中将固体碳质材料和燃烧空气的混合物注入燃烧室并点燃，从而形成贫燃料初级燃烧区。 气体燃料在主燃烧区域下游的区域中被注入到燃烧室中，从而形成贫燃料二次燃烧区域。 二次燃烧区的温度在约1800°F至2400°F的范围内。

公开(公告)号：US5655899A

公开(公告)日：1997-08-12

申请号：US417916

申请日：1995-04-06

申请人： Harjit S. Hura ,  Bernard P. Breen ,  James C. McMichael

发明人： Harjit S. Hura ,  Bernard P. Breen ,  James C. McMichael

IPC分类号： F23C6/04 ,  F23D14/22 ,  F23C5/00

CPC分类号： F23C6/047 ,  F23D14/22 ,  F23C2201/101

摘要： A fuel injector has an inner pipe within an outer pipe. The distal end of the inner pipe is set back from the distal end of the outer pipe to create a flame stabilization and mixing zone. A combustible gas and air mixture injected through the outer pipe forms a flame shroud around a gas stream injected through the inner pipe. This injector provides increased flame penetration and improved NO.sub.x reduction particularly when used to inject a flame shrouded gas stream into regions of the furnace at which the flue gas is at a temperature not greater than 2400.degree. F.

摘要翻译： 燃料喷射器在外管内具有内管。 内管的远端从外管的远端回放以形成火焰稳定和混合区。 通过外管注入的可燃气体和空气混合物围绕通过内管喷射的气流形成火焰护罩。 该喷射器提供了增加的火焰穿透和改进的NOx还原，特别是当用于将火焰覆盖的气流注入到炉的不高于2400°F的炉的区域中时。

公开(公告)号：US5915310A

公开(公告)日：1999-06-29

申请号：US507928

申请日：1995-07-27

申请人： Harjit S. Hura ,  Bernard P. Breen ,  James E. Gabrielson

发明人： Harjit S. Hura ,  Bernard P. Breen ,  James E. Gabrielson

IPC分类号： F23C6/04 ,  F23J15/00

CPC分类号： F23C6/047 ,  F23C2202/20 ,  F23J2215/10 ,  F23L2900/07009

摘要： A method of reducing NO.sub.x determines an NO.sub.x concentration profile within a zone of the furnace which is at a temperature below 2600.degree. F. A stream of fluid fuel is injected into at least one region of relatively high NO.sub.x concentration so that the fluid fuel mixes therein with the flue gas. The fluid fuel is natural gas, hydrogen, C.sub.x H.sub.y compounds, C.sub.x H.sub.y O.sub.z compounds or mixtures primarily of those compounds, in sufficient quantity to promote a reaction between nitrogen oxide in the flue gas and the fluid fuel, so as to substantially reduce nitrogen oxide content of the flue gas. The injector through which the fluid fuel is injected can be moveable and may have valves or deflectors to aid in directing the fluid fuel to regions of relatively high NO.sub.x concentration.

摘要翻译： 一种还原NOx的方法决定了炉内温度低于2600°F的区域内的NOx浓度分布。流体燃料流注入至少一个具有较高NOx浓度的区域，以使流体燃料在其中混合 与烟气。 流体燃料是天然气，氢，C x H y化合物，C x H y O z化合物或主要由那些化合物混合的物质，其量足以促进烟气中的氮氧化物与流体燃料之间的反应，以便基本上减少 烟气 注入流体燃料的喷射器可以是可移动的并且可以具有阀或偏转器，以帮助将流体燃料引导到具有较高NOx浓度的区域。

公开(公告)号：US06354072B1

公开(公告)日：2002-03-12

申请号：US09458751

申请日：1999-12-10

申请人： Harjit S. Hura

发明人： Harjit S. Hura

IPC分类号： F02C726

CPC分类号： F23D23/00 ,  F23D11/107 ,  F23R3/343

摘要： A combustor includes a fuel injector for injecting fuel into the combustor, a baseline air blast pilot splitter including a converging downstream side and a splitter extension. The splitter extension includes a diverging upstream portion attached to a baseline air blast splitter, a diverging downstream portion, and a converging intermediate portion extending between the upstream portion and the downstream portion.

摘要翻译： 燃烧器包括用于将燃料喷射到燃烧器中的燃料喷射器，包括会聚的下游侧和分流器延伸部的基准空气吹风导向分流器。 分流器延伸部包括附接到基准气泡分离器的发散上游部分，发散的下游部分和在上游部分和下游部分之间延伸的会聚中间部分。