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1.发明授权Apparatus and method for NO.sub.x reduction by controlled mixing of fuel rich jets in flue gas 失效燃料浓缩喷嘴在烟气中的控制混合的NOx还原装置和方法
公开(公告)号：US5655899A
公开(公告)日：1997-08-12
申请号：US417916
申请日：1995-04-06
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。
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2.发明授权Apparatus and method of lowering NO.sub.x emissions using diffusion processes 失效使用扩散过程降低NOx排放的装置和方法
公开(公告)号：US5078064A
公开(公告)日：1992-01-07
申请号：US623782
申请日：1990-12-07
IPC分类号： F23C1/12
CPC分类号： F23C1/12 , Y02E20/344
摘要： An apparatus and method for reducing nitrogen oxide emissions from furnace flue gas is provided in which natural gas or other fluid fuel which has little or no fixed nitrogen is introduced into the upper portion of the furnace. The fuel diffuses by laminar or turbulent diffusion into oxygen-rich flue gas where it reacts with oxygen and nitric oxide to form CO.sub.2, H.sub.2 O and N.sub.2, thus reducing the nitrogen oxide emissions from the furnace. In this manner, the amount of nitrogen oxide in the flue gas is reduced. The apparatus and method can be easily applied to new furnaces or retrofitted on existing furnaces.
摘要翻译： 提供了一种用于减少炉烟气中的氮氧化物排放的装置和方法，其中将天然气或具有很少或不固定氮的其它流体燃料引入炉的上部。 燃料通过层流或湍流扩散扩散到富氧烟气中，与氧气和一氧化氮反应形成CO2，H2O和N2，从而减少了炉内的氮氧化物排放。 以这种方式，烟气中的氮氧化物的量减少。 该设备和方法可以方便地应用于新的炉子或在现有的炉子上进行改造。
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公开(公告)号：US5316737A
公开(公告)日：1994-05-31
申请号：US85620
申请日：1993-07-01
申请人： Arthur P. Skelley , James C. McMichael , James T. Cobb, Jr. , Wesley M. Rohrer, Jr. , Phillip E. Custer, II , Taha M. Elsubki
发明人： Arthur P. Skelley , James C. McMichael , James T. Cobb, Jr. , Wesley M. Rohrer, Jr. , Phillip E. Custer, II , Taha M. Elsubki
CPC分类号： B01D53/346 , B01D53/60 , B01D53/75 , Y02P20/124
摘要： Exhaust gases containing oxides of nitrogen and sulfur from a fired process heater, a fossil fuel fired boiler, or a chemical process are diverted from a stack prior to admission to the atmosphere through a duct system containing heat exchangers that reduce the exhaust gas from an elevated temperature, if any, to about ambient temperature. Any heat extracted from the exhaust gas may be transferred to the boiler feed water which would serve to reduce the energy cost of operating a boiler. Once the exhaust gas is cooled to about ambient temperature, the gas is then mixed with an oxidant, such as ozone, at a preselected molar ratio to transform the oxides to higher orders of nitrogen and sulfur oxides to increase the absorbability of the nitrogen and sulfur oxides in a reagent solution. The reagent absorbs the oxidized contaminants from the exhaust gas. The oxides are transformed to dilute acids which are then neutralized to form salts that are acceptable for discharge to a municipal waste water treatment plant. The treated exhaust gas is then emitted from an exhaust stack containing contaminants at a level meeting air quality standards. Additionally any heat recovered from the exhaust gas can be used to lower operating costs.
摘要翻译： 在燃烧过程加热器，化石燃料燃烧锅炉或化学过程中含有氮和硫的氧化物的废气在通过包含热交换器的管道系统进入大气之前从堆叠中转移，所述热交换器将排气从升高的 温度（如果有的话）达到大约环境温度。 从废气中提取的任何热量都可以转移到锅炉给水中，这将有助于降低锅炉运行的能源成本。 一旦废气被冷却至大约环境温度，然后将气体以预选的摩尔比与氧化剂如臭氧混合，以将氧化物转化成更高级的氮和硫氧化物，以增加氮和硫的吸收性 氧化物在试剂溶液中。 试剂从废气中吸收氧化的污染物。 将氧化物转化成稀酸，然后将其中和以形成可向市政废水处理厂排放的盐。 经处理的废气然后从满足空气质量标准的水平的含有污染物的废气堆放出。 另外，从排气中回收的任何热量都可用于降低运行成本。
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公开(公告)号：US5206002A
公开(公告)日：1993-04-27
申请号：US751728
申请日：1991-08-29
申请人： Arthur P. Skelley , James C. McMichael , James T. Cobb, Jr. , Wesley M. Rohrer, Jr. , Phillip E. Custer, II , Taha M. Elsubki
发明人： Arthur P. Skelley , James C. McMichael , James T. Cobb, Jr. , Wesley M. Rohrer, Jr. , Phillip E. Custer, II , Taha M. Elsubki
CPC分类号： B01D53/346 , B01D53/60 , B01D53/75 , Y02P20/124
摘要： Exhaust gases containing oxides of nitrogen and sulfur from a fired process heater, a fossil fuel fired boiler, or a chemical process are diverted from a stack prior to admission to the atmosphere through a duct system containing heat exchangers that reduce the exhaust gas from an elevated temperature, if any, to about ambient temperature. Any heat extracted from the exhaust gas may be transferred to the boiler feed water which would serve to reduce the energy cost of operating a boiler. Once the exhaust gas is cooled to about ambient temperature, the gas is then mixed with an oxidant, such as ozone, at a preselected molar ratio to transform the oxides to higher orders of nitrogen and sulfur oxides to increase the absorbability of the nitrogen and sulfur oxides in a reagent solution. The reagent absorbs the oxidized contaminants from the exhaust gas. The oxides are transformed to dilute acids which are then neutralized to form salts that are acceptable for discharge to a municipal waste water treatment plant. The treated exhaust gas is then emitted from an exhaust stack containing contaminants at a level meeting air quality standards. Additionally any heat recovered from the exhaust gas can be used to lower operating costs.
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公开(公告)号：US4999167A
公开(公告)日：1991-03-12
申请号：US369249
申请日：1989-06-20
CPC分类号： B01D53/343 , B01D53/60 , F23J15/04 , Y10S261/09 , Y10S55/30
摘要： Exhaust gases from a process fired boiler are diverted from a stack prior to emission to the atmosphere through a duct system to a plurality of series connected heat exchangers. The exhaust gases are progressively reduced from an elevated temperature, for example in the range between about 350.degree.-525.degree. F., in stages to an ambient temperature of about 50.degree. F. At each stage heat from the exhaust gases is transferred from the gases to another medium, such as water, which is fed back to the boiler to reduce the energy cost of operating the boiler. At ambient temperature the exhaust gases are subjected to an atomized spray of a reagent solution that absorbs the contaminants in the exhaust gases. Absorption of the contaminants into solution with the atomized reagent spray is promoted by contact of the spray and exhaust gases on the surface of a fibrous batting. With the exhaust gases at ambient temperature the percentage of contaminants in the flue gas that enters into solution with the reagent is substantially increased. Thus the reagent absorbs the contaminants, and the exhaust gases are emitted after further moisture separation substantially free of contaminants.
摘要翻译： 来自过程燃烧锅炉的废气在通过管道系统排放到大气之前从堆叠转向多个串联连接的热交换器。 废气从升高的温度逐渐降低，例如在约350°-525°F之间的范围内，分级至约50°F的环境温度。在每个阶段，来自废气的热量从 气体到另一种介质，如水，其被反馈回锅炉以降低操作锅炉的能量成本。 在环境温度下，废气经受吸收废气中污染物的试剂溶液的雾化喷雾。 用雾化试剂喷雾将污染物吸收到溶液中通过喷雾和废气在纤维棉絮表面上的接触来促进。 随着废气在环境温度下，与试剂进入溶液的烟气中的污染物百分比显着增加。 因此，试剂吸收污染物，并且在基本上没有污染物的进一步水分分离之后排放废气。
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