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    • 1. 发明授权
    • Electrically-heated combustion catalyst structure and method for
start-up of a gas turbine using same
    • 电加热燃烧催化剂结构及使用其的燃气轮机起动方法
    • US6109018A
    • 2000-08-29
    • US688075
    • 1996-07-26
    • Thomas Rostrup-NielsenRalph A. Dalla BettaToru ShojiScott A. MagnoDavid K. Yee
    • Thomas Rostrup-NielsenRalph A. Dalla BettaToru ShojiScott A. MagnoDavid K. Yee
    • F01N3/20F01N3/28F23C13/00F23R3/40F02C7/26
    • F23R3/40F01N3/2013F01N3/2026F01N3/281F02C7/26F23C13/00F23C13/02F01N2330/323F01N2610/03F05D2220/76F05D2260/85F23D2206/10Y02T10/26
    • This invention relates to an electrically-heated catalyst (EHC) and a start-up method of a gas turbine engine for combusting a hydrocarbonaceous fuel/oxygen-containing gas mixture using this electrically-heated catalyst. The catalytic structure is electrically heated to a predetermined temperature prior to start up of the turbine so as to reduce emissions during the start-up of the system. The EHC unit is a stacked or spirally wound layering of flat and corrugated thin metal foils which forms a plurality of axially-extending, longitudinal channels. The channels are preferably coated on one surface with a catalytic material, leaving the other surface free from the reaction to act as a heat sink, making the design an IHE (integral heat exchange) catalytic unit. The preferred embodiment of the EHC has electrodes outside of the fuel/oxygen-containing mixture stream, and uses electrical power having a predetermined voltage in the range of 100 to 200 volts to heat the unit. A method for using the EHC in the start-up of a gas turbine is also disclosed wherein an electrical power is applied to heat the EHC a predetermined temperature prior to the fuel/oxygen-containing mixture being introduced and may be left on for a certain period of time after the introduction of the fuel/oxygen-containing mixture. The EHC may be maintained at the desired predetermined temperature by modulating the applied voltage. The electrical power is terminated when any one of several conditions are met including when the heat of the catalytic reaction is sufficient to maintain the catalyst at its steady-state condition or when a certain period of time has elapsed.
    • 本发明涉及使用该电加热催化剂燃烧含烃燃料/含氧气体混合物的燃气涡轮发动机的电加热催化剂(EHC)和起动方法。 催化结构在涡轮启动之前被电加热至预定温度,以便在系统启动期间减少排放。 EHC单元是形成多个沿轴向延伸的纵向通道的平坦且波浪形的薄金属箔的层叠或螺旋卷绕的层。 通道优选在一个表面上用催化材料涂布,使另一个表面没有反应作为散热器,使得设计成为IHE(整体式热交换)催化单元。 EHC的优选实施例具有位于燃料/含氧混合物流之外的电极,并且使用具有在100至200伏特范围内的预定电压的电力来加热该单元。 还公开了在燃气轮机起动中使用EHC的方法,其中在引入燃料/含氧混合物之前施加电功率以将EHC加热到预定温度,并且可以保持一定的 在引入燃料/含氧混合物之后的时间段。 可以通过调制所施加的电压将EHC保持在所需的预定温度。 当满足几个条件中的任何一个时,电力终止,包括当催化反应的热量足以使催化剂保持在其稳定状态或当经过一定时间段时。
    • 5. 发明授权
    • Method of thermal NOx reduction in catalytic combustion systems
    • 催化燃烧系统中热还原NOx的方法
    • US06718772B2
    • 2004-04-13
    • US10040208
    • 2001-10-26
    • Ralph A. Dalla BettaMarco A. VelascoDavid K. YeeSarento G. Nickolas
    • Ralph A. Dalla BettaMarco A. VelascoDavid K. YeeSarento G. Nickolas
    • F02C722
    • F23R3/40
    • Methods and apparatus, both devices and systems, for control of Zeldovich (thermal) NOx production in catalytic combustion systems during combustion of liquid or gaseous fuels in the post catalytic sections of gas turbines by reducing combustion residence time in the HC zone through control of the HC Wave, principally by adjusting the catalyst inlet temperature. As the fuel/air mixture inlet temperature (to the catalyst) is reduced, the HC Wave moves downstream (longer ignition delay time), shortens the residence time at high temperature, thereby reducing thermal NOx production. The countervailing increase in CO production by longer ignition delay times can be limited by selectively locating the HC Wave so that thermal NOx is reduced while power output and low CO production is maintained. NOx is reduced to on the order of
    • 用于控制在燃气涡轮机的后催化部分中燃烧液体或气体燃料期间的催化燃烧系统中的Zeldovich(热)NOx生成的方法和装置,通过控制HC区域中的燃烧停留时间来减少 HC Wave主要通过调节催化剂入口温度。 随着燃料/空气混合物入口温度(催化剂)减少,HC波向下游移动(点火延迟时间较长),缩短了高温下的停留时间,从而降低了NOx的产生。 通过选择性地定位HC波,可以限制由较长的点火延迟时间产生的CO生产的反补贴增加,使得在输出功率和低CO生产时保持热NOx。 当CO保持在<100ppm,典型地<50ppm,优选<5-10PPM时,NOx降低到大约<3ppm,优选<2ppm。
    • 10. 发明授权
    • Design and control strategy for catalytic combustion system with a wide operating range
    • 具有广泛工作范围的催化燃烧系统设计与控制策略
    • US06796129B2
    • 2004-09-28
    • US10071749
    • 2002-02-07
    • David K. YeeRobert Anthony Corr, IISarento George Nickolas
    • David K. YeeRobert Anthony Corr, IISarento George Nickolas
    • F02C916
    • F23C13/00F23C13/02F23C2900/13002F23N5/003F23N2025/10F23N2037/12F23R3/40
    • The present additional control strategy has been developed to allow the gas turbine to operate at lower load or at other conditions where the total fuel required by the gas turbine is not optimum for full combustion of the fuel. The present invention manages air that bypasses the catalytic combustor and air that bleeds off of the compressor discharge. The bypass system changes the fuel air ratio of the catalytic combustor without affecting the overall gas turbine power output. The bleed system also changes the fuel air ratio of the catalytic combustor but at the cost of reducing the overall gas turbine efficiency. The key advantage of a catalytic combustor with a bypass and bleed system and the inventive control strategy is that it can maintain the catalyst at optimum low emissions operating conditions over a wider load range than a catalytic combustor without such a system.
    • 已经开发了本附加控制策略,以允许燃气轮机以较低的负载或在燃气轮机所需的总燃料对于燃料的完全燃烧不是最佳的其他条件下运行。 本发明管理绕过催化燃烧器的空气和从压缩机排出口流出的空气。 旁路系统改变催化燃烧器的燃料空气比,而不影响整个燃气轮机功率输出。 排气系统还改变催化燃烧器的燃料空气比,但是以降低总体燃气轮机效率为代价。 具有旁路和排气系统的催化燃烧器的关键优点是本发明的控制策略是,在不具有这种系统的情况下,其能够在比不含催化燃烧器的更宽的负载范围内将催化剂保持在最佳的低排放操作条件。