CN101203660A - 蒸汽发生设备以及用于运行和改装蒸汽发生设备的方法 - Google Patents

蒸汽发生设备以及用于运行和改装蒸汽发生设备的方法 Download PDF

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CN101203660A
CN101203660A CNA2006800200232A CN200680020023A CN101203660A CN 101203660 A CN101203660 A CN 101203660A CN A2006800200232 A CNA2006800200232 A CN A2006800200232A CN 200680020023 A CN200680020023 A CN 200680020023A CN 101203660 A CN101203660 A CN 101203660A
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B·格利克
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MAN Energy Solutions SE
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K3/00Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/18Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
    • F01K3/20Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters with heating by combustion gases of main boiler
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    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
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    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
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    • F25J3/04006Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
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    • F25J3/02Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
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    • F25J3/04115Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
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    • F25J3/04115Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
    • F25J3/04121Steam turbine as the prime mechanical driver
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    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
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    • F25J3/04115Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
    • F25J3/04133Electrical motor as the prime mechanical driver
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
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    • F25J3/04Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04109Arrangements of compressors and /or their drivers
    • F25J3/04139Combination of different types of drivers mechanically coupled to the same compressor, possibly split on multiple compressor casings
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    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
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    • F25J3/04521Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04527Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general
    • F25J3/04533Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the direct combustion of fuels in a power plant, so-called "oxyfuel combustion"
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    • F25J3/04521Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04593The air gas consuming unit is also fed by an air stream
    • F25J3/046Completely integrated air feed compression, i.e. common MAC
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    • F25J3/04521Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04612Heat exchange integration with process streams, e.g. from the air gas consuming unit
    • F25J3/04618Heat exchange integration with process streams, e.g. from the air gas consuming unit for cooling an air stream fed to the air fractionation unit
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    • F25J3/04763Start-up or control of the process; Details of the apparatus used
    • F25J3/04866Construction and layout of air fractionation equipments, e.g. valves, machines
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    • F25J2230/00Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/80Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being carbon dioxide
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    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/16Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y02E20/18Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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Abstract

本发明涉及一种蒸汽发生设备,该蒸汽发生设备包括蒸汽发生器(1),该蒸汽发生器(1)具有燃烧室(8)、汽化器、过热器(9)、中间过热器(12)、冷凝器(14)、通过蒸汽再生加热的给水预热器(16、19、19’),此外还包括汽轮机组(2)以及连接到燃烧室(8)上的烟气管路(22)、用于将燃烧用空气输送到所述燃烧室(8)的炉膛中的空气输入管路(21)以及被烟气及燃料空气流过的空气预热器(3),其中所述汽轮机组(2)具有高压部分(4)、中压部分(5)和低压部分(6)。在这种蒸汽发生设备中,空气管路(23)在所述空气预热器(3)的下游从所述空气输入管路(21)分支出来并且通向空气分离设备(25)。在所述空气管路(23)中布置了空气冷却器(34、35),来自所述蒸汽发生器(1)的冷凝液/给水-回路的冷凝液或者说给水流经所述空气冷却器(34、35)。所述空气分离设备(25)的氧气出口通过氧气管路(26)与所述燃烧室(8)的炉膛相连接。

Description

蒸汽发生设备以及用于运行和改装蒸汽发生设备的方法
技术领域
本发明涉及一种具有权利要求1前序部分所述特征的蒸汽发生设备以及一种按权利要求17或23所述的用于运行或改装蒸汽发生设备的方法。
背景技术
所述的蒸汽发生设备通过化石燃料的燃烧产生二氧化碳,二氧化碳则破坏大气中的臭氧层。因此由工业部门及科研院所在发电厂领域进行共同开发以便将二氧化碳从烟气中分离出来。
属于共同开发的范畴的是,将一氧化碳用水转换为二氧化碳和氢并且随后分离出二氧化碳(IGCC(整体煤气化联合循环)-方法)并且用纯氧燃烧化石燃料并且随后进行二氧化碳分离(氧燃料(Oxy-Fuel)方法)。在使用氧燃料方法的情况下重新制造蒸汽发生设备,这一点根据今天的估计只有在今后大约10年到20年之后的时刻才能得到实现并且而后也会产生巨大的投资费用。
若对既有的、按传统方法燃烧的发电厂进行改装,则情况可能完全更加有利,因为投资显著减少。由于在用纯氧燃烧的情况下要对二氧化碳进行离析,所以对于氧燃料改装来说出于费用原因并且由于使用的压缩机单元的大小仅仅对处于较大的从100到300MW的功率范围内的发电机组加以考虑。
发明内容
本发明的任务是,如此用炉膛在使用纯氧(氧燃料法)的情况下对所述类型的蒸汽发生设备进行改装,使得所述蒸汽发生设备不仅可以根据氧燃料法进行工作,而且可以以传统的运行方式进行工作。
该任务在一种所述类型的蒸汽发生设备上并且在一种用于对这样的设备进行运行的方法上按本发明通过权利要求1或权利要求17或23所述特征性特征得到解决。本发明的优选的设计方案是从属权利要求的主题。
按本发明进行改装以便使用氧燃料法,以此在按本发明的蒸汽发生设备中将既有的再生的给水预热以及既有的、在蒸汽发生器的烟气侧上的空气预热考虑在内并且考虑到中间过热。如此在燃烧用空气侧上选择所述蒸气发生设备的线路,从而可以继续不受限制地利用空气作为唯一的氧气载体进行运行。由此在不影响传统的在可能的新鲜空气运行中的蒸汽发生设备的情况下改装成氧燃料设备。在此这种改装可以扩大到更大的单元。
附图说明
本发明的多种实施例在附图中示出,并且下面结合本发明的优点进行详细解释。其中:
图1是蒸汽发生设备的线路图,其中该蒸汽发生设备已改装到用氧气进行运行(氧燃料运行)并且
图2到4是按图1的蒸汽发生设备的其它实施方式。
具体实施方式
所述蒸汽发生设备包括具有水-蒸汽-回路的蒸汽发生器1、汽轮机组2以及空气输入系统、烟气排放系统以及被烟气加热的再生的空气预热器(热风预热器3)。就这点而言,该蒸汽发生设备为传统结构类型。接下来仅仅就对理解本发明所必需的方面对其进行简短解释。
所述汽轮机组2包括高压部分4、中压部分5和低压部分6,这些部分布置在一根共同的轴上并且驱动着用于产生电能的发电机7。
所示出的蒸汽发生器1是强制连续蒸汽发生器。接下来的说明也可应用到圆筒锅炉上。所述蒸汽发生器1具有燃烧室8,该燃烧室8设有用气状燃料运行的炉膛。原则上,也可以在考虑使用烟气净化装置的情况下进行在煤炭基础上的运行。在所述燃烧室8的汽化器加热面的后面附接一个过热器9。连接到所述过热器9上的高压蒸汽管路10通向所述汽轮机组2的高压部分4。所述高压部分4的排汽口通过连接管路11与所述蒸汽发生器1的中间过热器12相连接。所述中间过热器12在排汽侧上通过中间蒸汽管路13与所述汽轮机组2的中压部分5相连接。在所述中压部分5的后面在蒸汽侧附接了所述低压部分6。
所述低压部分6的排汽侧通向冷凝器14。在该冷凝器14上连接了在其中布置了冷凝液泵15’的冷凝液管路15。在该冷凝液管路15中先后布置多个低压给水预热器16、一个热给水除气器17、一个高压给水泵18和多个高压给水预热器19、19’。最后的高压给水预热器19’与附加的并且烟气加热的给水预热器或者与所述蒸汽发生器1的汽化器相连接。所述给水预热器16、19通过所述汽轮机组2的高压部分4、中压部分5和低压部分6的废气得到加热。
风机20布置在空气输入管路21中,所述空气输入管路21则连接到所述再生的空气预热器3的进汽侧的空气部分上并且在所述空气预热器3的下游通向所述燃烧室8的炉膛,用于向该炉膛供给燃烧用空气。在所述蒸汽发生器1的烟气出口上连接了烟气管路22,该烟气管路22则通向所述再生的空气预热器3的进口侧的气体部分。出于图示原因,该烟气管路22在附图中在“b”位置上中断。紧接在所述空气预热器3后面,所述烟气管路22通向烟囱36。
此前的说明涉及一种传统的蒸汽发生设备。现在对将蒸汽发生设备改装成氧燃料设备进行说明。这种改装可以在以后在既有的蒸汽发生设备上进行,或者从一开始在新的蒸汽发生设备上进行。
空气输入管路23在所述空气预热器3的下游从所述空气管路21分支出来并且通向空气压缩机24。该空气压缩机24的出口通向空气分离设备25。该空气分离设备25的氧气出口通过氧气管路26与气体混合器27相连接,该气体混合器27在所述空气输入管路21中布置在所述空气预热器3和所述蒸汽发生器1的燃烧室8的炉膛之间。
所述空气压缩机24通过驱动汽轮机28来驱动。按照图1向所述驱动汽轮机28加载蒸汽,所述蒸汽从处于所述蒸汽发生器1的中间过热器12和所述汽轮机组2的中压部分5之间的中间蒸汽管路13中通过蒸汽管路29来抽取。出于图示原因,在附图中所述蒸汽管路29在位置“a”处中断。在进入所述驱动汽轮机28的进口之前,在所述蒸汽管路29中布置了调节阀30。所述驱动汽轮机28的排汽口通向冷凝器31,该冷凝器31通过在其中设有泵33的冷凝液管路32在所述低压给水预热器组16的第一低压给水预热器的上游与所述蒸汽发生器1的冷凝液管路15相连接。
如果在所述冷凝器14上的结构情况允许,那么可以将所述驱动汽轮机28的废汽输送给所述蒸汽发生器1的主冷凝器14。由此可以省去所述驱动汽轮机28的冷凝器31以及所属的冷凝液泵33。
在图2中示出了驱动汽轮机28’,在此没有向该驱动汽轮机28’加载中间蒸汽,而是加载废汽。所述废汽在所述汽轮机组2的合适的抽汽级47上抽取并且通过蒸汽管路29’输送给所述驱动汽轮机28’。
按照图3也可以使用驱动汽轮机28”,通过蒸汽管路29”向该驱动汽轮机28”加载来自外部蒸汽源48的蒸汽。这个外部蒸汽源可以是直接燃烧的蒸汽发生器。
代替驱动汽轮机28、28’、28”,也可以-象在图4中示出的一样-使用电机49,用于驱动所述空气压缩机24。
在所述空气管路23中,在所述空气预热器3和空气压缩机24之间布置了两个空气冷却器34、35。所述空气冷却器34、35就象所述驱动着空气压缩机24的驱动汽轮机28一样被整合在所述蒸汽发生器1的水-蒸汽-回路中。高压给水从处于所述空气预热器3上游的空气冷却器34中流过,所述高压给水在所述高压给水预热器19的下游从所述冷凝液管路15中提取并且在该高压给水预热器19的上游导回到所述冷凝液管路15中。如果通过内部的烟气再循环对在所述蒸汽发生器1的中间过热器12中的蒸汽温度进行调节,那么最后的高压给水预热器19’还可以额外地整合在所述空气冷却器34中。低压给水从所述处于空气预热器3的下游的空气冷却器35中流过,所述低压给水在所述低压给水预热器组16的下游从所述冷凝液管路15中提取,并且在该低压给水预热器组16的上游导回到所述冷凝液管路15中。
在所述烟气管路22中,在所述再生的空气预热器3和通往烟囱36的支路的下游,布置了再循环风机37。在该再循环风机37的下游,所述烟气管路22分支成两条烟气支路38、39。第一烟气支路38汇入所述气体混合器27中。
第二烟气支路39则通往二氧化碳压缩机40。该二氧化碳压缩机40通过扩展器42和电动机/发电机41来驱动。所述二氧化碳压缩机40和扩展器42与所述电动机/发电机41一起布置在一根轴上。
就象在图3和4中示范性地示出的一样,可以省去所述电动机/发电机42。取而代之的是,所述空气压缩机24、扩展器42及二氧化碳压缩机40与所述驱动汽轮机28”或电动机49一起作为驱动装置布置在单轴传动系50上。在此应该强调,所述在图3和4中示出的传动系也可以在按图1和2的蒸汽发生设备中使用,这就象所述按图1和2的传动系也可以在按3和4的蒸汽发生设备中使用一样。
在所述第二烟气支路39中,在其进入所述二氧化碳压缩机40的进口之前布置了用于将烟气冷却到水露点之下的换热器43,由此将水从烟气中分离出来。该换热器43通过连接管路44’通过朗肯循环过程44与所述扩展器42相连接,在该朗肯循环过程中作为工作介质使用了具有低沸点的致冷剂比如NH3。连接到所述扩展器42的出口上的泵45使所述工作介质通过所述换热器43及扩展器42进行循环。
就象在附图中示出以及此前描述的一样,所述经过空气压缩机24通往空气分离设备25的并且接纳着空气冷却器34、35的空气管路23以及所述来自空气分离设备25的氧气管路26并行于所述通向燃烧室8的空气输入管路21连接。在所述空气输入管路21、空气管路23、氧气管路26、第一烟气支路38以及第二烟气支路39中的截止阀/调节阀46用于关断相关的管路或者用于调节流过相关的管路的介质。
此前所描述的蒸汽发生设备按如下方式运行。对于氧燃料过程来说,也就是说对于用氧气进行的运行来说所必需的空气在所述再生的空气预热器3后面借助于汽轮机冷凝液冷却到尽可能低的温度上,并且在所述空气压缩机24中压缩到对所述空气分离设备25来说所必需的压力。
所述空气压缩机24的驱动借助于所述驱动汽轮机28、28’进行,向所述驱动汽轮机28、28’供给来自中间过热器12的中间蒸汽或者供给来自所述汽轮机2的中压部分5的抽汽级47的废汽。所述汽轮机组2的减低的功率在这种情况下很小,因为通过所述燃烧用空气的热量移入所述蒸汽发生器1的冷凝液回路中这种方式在量方面部分地对中间蒸汽或废汽的提取进行补偿,方法是所述蒸汽管路的抽汽点在中压侧及低压侧关闭或者仅仅部分打开。所出现的驱动汽轮机28、28’的冷凝液被导送到所述蒸汽发生器1的冷凝液回路中。由此不再需要额外的除气器及额外的蒸汽-冷凝液系统。所述燃烧用空气的热量从所述空气预热器3移入所述蒸汽发生器1的冷凝液-给水-回路中,由此对因抽取中间蒸汽或废汽用于驱动驱动汽轮机28、28’而减低的功率进行最大程度上的补偿。
如果所述汽轮机组2的通流能力足够并且所述发电机7还具有额外的潜力,那就可以将所述空气压缩机24的驱动装置和所述中间蒸汽汇流排脱耦,在此所述中间蒸汽汇流排包括所述汽轮机组2的中压部分5的中间蒸汽管路13以及抽汽级47。在这种情况下,为进行驱动,不仅提供电动机,而且提供具有直接燃烧的蒸汽发生器的纯汽轮机过程。这样的方案的优点在所述蒸汽发生器上不仅在于自由地选择蒸汽参数,而且在于改进了所述蒸汽发生设备转换到纯空气运行的转换过程的动态性能,其中在用于氧燃料过程的附加的叶轮机械断开(Trip)的情况下就要进行这种转换。为了提高所述驱动过程的效率,可以将所述空气压缩机24的中间热量及后冷却器热量有利地集成在改装的设备方案中。
用于空气分离设备25的空气通过所述空气压缩机24压缩到必要的、用于所述空气分离设备25的压力。在所述蒸汽发生设备的功率上升时,提供轴向压缩机和径向压缩机与中间冷却器和后冷却器的组合。原则上,也可以使用纯机动的驱动装置。
所述蒸汽发生设备以风机20的100%的负荷来起动,其中大约60%的空气量输送给所述空气分离设备25,也就是该空气分离设备25的最低负荷,并且大约40%的空气量输送给蒸汽发生器1,也就是强制连续蒸汽发生器或者自然循环锅炉的最低负荷。所说明的数值按方法会相应地有所变化。所述蒸汽发生器1一直在部分负荷-新鲜空气运行状态中运行,直至达到空气分离设备25中相应的氧气质量。而后转换为从部分负荷-空气运行到相应的部分负荷-氧气运行的氧燃料运行。而后在考虑到所述空气分离设备25的允许的数值的情况下进一步增加负荷。然后以相反的方向从氧气运行出发转换为空气运行。
因取消了在氧气燃烧时的氮,从而与新鲜空气运行相比减少了在所述蒸汽发生器1的烟气通道中的烟气质量流量,而相应地同时大大提高燃烧温度。燃烧温度的提高会导致在所述蒸汽发生器1的燃烧室8中的管子出现巨大的热负荷。但是,通过所述气体混合器27将预先规定的高的烟气返回喷入所述蒸汽发生器1的燃烧系统中,以此不仅将质量流量而且将燃烧温度调节到和在新鲜空气运行中相类似的数值。通过氧气和再循环的烟气在气体混合器27中的汇合,达到和在新鲜空气运行中相类似的氧气含量。出于热力学原因,在所述空气预热器3的后面抽出经过再循环的烟气。
象早已提到的一样,所有属于氧燃料过程的设备部件都与所述蒸汽发生设备并联连接。此外,在所述空气输入管路21、空气管路23、氧气管路26、第一烟气支路38及第二烟气支路39中布置截止阀/调节阀46。通过这种方式,将所述氧燃料过程集成到所述蒸汽发生设备1中,从而也随时可以在没有氧气供给的情况下进行纯新鲜空气运行。为此应该关闭相应的截止阀/调节阀46。在叶轮机械如空气压缩机24、扩展器42及二氧化碳压缩机40失灵或关断时,所述蒸汽发生设备1也可以进行纯新鲜空气运行。在所述蒸汽发生设备的检验时间里,在并联连接的、属于氧燃料过程的设备部件的安装作业结束后进行短接。
其余的烟气,主要由二氧化碳和水组成,为除去水份通过所述基于NH3的朗肯循环过程44冷却到远低于所述烟气的水露点以下。通过水蒸气份额的、在这过程中释放的汽化热以及所述烟气的潜在的热量,可以通过所述扩展器42获得额外的电能。
所述扩展器42通过所述电动机/发电机41驱动所述二氧化碳压缩机40,该二氧化碳压缩机40根据用途提供必需的预先确定的二氧化碳最终压力。在此可以压缩到200bar用于EOR-过程(提高油采收工艺)(EOR=Enhanced Oil-Recovering)。根据所述压缩机40的所要求的驱动功率,要么进行电动机运行要么进行发电机运行。

Claims (28)

1.蒸汽发生设备,包括
-蒸汽发生器(1),该蒸汽发生器(1)具有燃烧室(8)、汽化器、过热器(9)、中间过热器(12)、冷凝器(14)、通过蒸汽再生加热的给水预热器(16、19、19’),
-汽轮机组(2),该汽轮机组(2)具有高压部分(4)、中压部分(5)和低压部分(6),
-连接到所述燃烧室(8)上的烟气管路(22),
-用于将燃烧用空气输送到所述燃烧室(8)的炉膛中的空气输入管路(21),
-被烟气及燃烧用空气流过的空气预热器(3),
其特征在于,
-可关断的空气管路(23)在所述空气预热器(3)的下游从所述空气输入管路(21)分支出来并且通向空气分离设备(25),
-在所述空气管路(23)中布置了空气冷却器(34、35),来自所述蒸汽发生器(1)的冷凝液/给水-回路的冷凝液或者说给水流经所述空气冷却器(34、35),并且
-所述空气分离设备(25)的氧气出口通过氧气管路(26)与所述燃烧室(8)的炉膛相连接。
2.按权利要求1所述的蒸汽发生设备,其特征在于,在所述空气管路(23)中在所述空气冷却器(34、35)和空气分离设备(25)之间布置了空气压缩机(24)。
3.按权利要求1或2所述的蒸汽发生设备,其特征在于,所述经过空气压缩机(24)通往空气分离设备(25)的并且接纳着所述空气冷却器(34、35)的空气管路(23)以及来自所述空气分离设备(25)的氧气管路(26)并行于所述通往燃烧室(8)的空气输入管路(21)连接。
4.按权利要求1到3中任一项所述的蒸汽发生设备,其特征在于,在所述空气输入管路(21)、空气管路(23)及氧气管路(26)中分别布置了截止阀/调节阀(46)。
5.按权利要求2所述的蒸汽发生设备,其特征在于,所述空气压缩机(24)通过驱动汽轮机(28)来驱动,在此向该驱动汽轮机(28)加载来自所述蒸汽发生器(1)的中间过热器(12)的蒸汽。
6.按权利要求2所述的蒸汽发生设备,其特征在于,所述空气压缩机(24)通过驱动汽轮机(28’)来驱动,在此向该驱动汽轮机(28’)加载来自所述汽轮机组(2)的抽汽级(a’)的蒸汽。
7.按权利要求2所述的蒸汽发生设备,其特征在于,所述空气压缩机(24)通过驱动汽轮机(28”)来驱动,在此向该驱动汽轮机(28”)加载来自外部的蒸汽源(48)的蒸汽。
8.按权利要求2所述的蒸汽发生设备,其特征在于,所述空气压缩机(24)通过电动机(49)来驱动。
9.按权利要求5或6所述的蒸汽发生设备,其特征在于,所述驱动汽轮机(28、28’)与冷凝器(31)相连接,该冷凝器的冷凝液出口与所述蒸汽发生器(1)的冷凝液回路相连接。
10.按权利要求1到9中任一项所述的蒸汽发生设备,其特征在于,第一烟气支路(38)在所述空气预热器(3)的下游从所述烟气管路(22)中分支出来,所述第一烟气支路(38)通往气体混合器(27),来自空气分离设备(25)的氧气管路(26)及所述空气输入管路(21)汇入所述气体混合器(27)中,并且所述气体混合器(27)与所述燃烧室(8)的炉膛相连接。
11.按权利要求1到10中任一项所述的蒸汽发生设备,其特征在于,第二烟气支路(39)在所述空气预热器(3)的下游从所述烟气管路(22)中分支出来并且所述第二烟气支路(39)通往二氧化碳压缩机(40)。
12.按权利要求11所述的蒸汽发生设备,其特征在于,在所述第二烟气支路(39)中布置了用于将那些在利用来自空气分离设备(25)中的氧气来运行所述燃烧室(8)时产生的烟气冷却到其水露点以下的换热器(43),并且所述换热器(43)通过连接管路(44’)通过朗肯循环过程(44)在使用具有低沸点的致冷剂的情况下与扩展器(42)相连接。
13.按权利要求11或12所述的蒸汽发生设备,其特征在于,所述二氧化碳压缩机(40)通过所述扩展器(42)来驱动。
14.按权利要求13所述的蒸汽发生设备,其特征在于,在所述二氧化碳压缩机(40)和扩展器(42)之间布置了电动机/发电机(41)。
15.按权利要求11到13中任一项所述的蒸汽发生设备,其特征在于,所述空气压缩机(24)、扩展器(42)、二氧化碳压缩机(40)和由驱动汽轮机(28、28’、28”)或者电动机(49)构成的驱动装置布置在一个共同的单轴传动系(50)上。
16.按权利要求1到13中任一项所述的蒸汽发生设备,其特征在于,既有的或者新安装的蒸汽发生设备的蒸汽发生器(1)可通过空气冷却器(34、35)、空气压缩机(24)、空气分离设备(25)、朗肯循环(44)及二氧化碳压缩机(40)来改装。
17.用于运行蒸汽发生设备的方法,该蒸汽发生设备包括
-蒸汽发生器(1),该蒸汽发生器(1)具有燃烧室(8)、汽化器、过热器(9)、中间过热器(12)、冷凝器(14)、通过蒸汽再生加热的给水预热器(16、19、19’),
-汽轮机组(2),该汽轮机组(2)具有高压部分(4)、中压部分(5)和低压部分(6),
-连接到所述燃烧室(8)上的烟气管路(22),
-用于将燃烧用空气输送到所述燃烧室(8)的炉膛中的空气输入管路(21),
-空气预热器(3),其中烟气及燃烧用空气流经该空气预热器(3),
其特征在于,
-在所述空气预热器(3)的下游,气流通过空气管路(23)分支出来并且通往空气分离设备(25),
-所述气流在所述空气管路(23)中通过来自所述蒸汽发生器(1)的冷凝液/给水-回路的冷凝液或者说给水来冷却,
-所述经过冷却的气流在空气分离设备(25)中被分解成氧气份额和氮气份额,
-并且所述氧气份额通过氧气管路(26)输送给所述燃料室(8)的炉膛。
18.按权利要求17所述的方法,其特征在于,所述在利用来自空气分离设备(25)的氧气来运行燃烧室(8)时产生的烟气在所述空气预热器(3)的下游通过第二烟气支路(39)分支出来,所述烟气在换热器(43)中通过包括这些换热器(43)和扩展器(42)的朗肯循环过程(44)在使用具有低沸点的致冷剂的情况下冷却到其水露点以下,并且随后在二氧化碳压缩机(40)中被压缩。
19.按权利要求17或18所述的方法,其特征在于,在包括空气压缩机(24)、扩展器(42)及二氧化碳压缩机(40)的叶轮机械关断或失灵后并且在关闭所述截止阀/调节阀(46)后,所述蒸汽发生器(1)用新鲜空气通过所述空气输入管路(21)来运行。
20.按权利要求17到19中任一项所述的方法,其特征在于,在所述蒸汽发生设备的检验时间里,使所述与蒸汽发生器(1)并联的装置在安装作业结束后进行短接。
21.按权利要求18所述的方法,其特征在于,在所述二氧化碳压缩机(40)中,所述主要由二氧化碳和少量水组成的烟气压缩到对下一个用途来说所必需的排出压力。
22.按权利要求18到21中任一项所述的方法,其特征在于,所述空气压缩机(24)的中间冷却热量及后冷却热量通过所述朗肯循环过程(44)与所述连接管路(44’)、换热器(43)及扩展器(42)相关联,由此产生额外的用于所述二氧化碳压缩机(40)的驱动能量。
23.用于对蒸汽发生设备进行改装的方法,该蒸汽发生设备包括
-蒸汽发生器(1),该蒸汽发生器(1)具有燃烧室(8)、汽化器、过热器(9)、中间过热器(12)和冷凝器(14)以及通过蒸汽再生加热的给水预热器(16、19、19’),
-汽轮机组(2),该汽轮机组(2)具有高压部分(4)、中压部分(5)和低压部分(6),
-连接到所述燃烧室(8)上的烟气管路(22),
-用于将燃烧用空气输送到所述燃烧室(8)的炉膛中的空气输入管路(21),
-空气预热器(3),其中烟气及燃烧用空气流经该空气预热器(3),
其特征在于,
-在所述空气预热器(3)的下游,气流通过空气管路(23)分支出来并且通往空气分离设备(25),
-所述气流在所述空气管路(23)中通过来自所述蒸汽发生器(1)的冷凝液/给水-回路的冷凝液或者说给水来冷却,
-所述经过冷却的气流在空气分离设备(25)中被分解成氧气份额和氮气份额,
-并且所述氧气份额通过氧气管路(26)输送给所述燃料室(8)的炉膛。
24.按权利要求23所述的方法,其特征在于,所述在利用来自空气分离设备(25)的氧气来运行燃烧室(8)时产生的烟气在所述空气预热器(3)的下游通过第二烟气支路(39)分支出来,所述烟气在换热器(43)中通过包括这些换热器(43)和扩展器(42)的朗肯循环过程(44)在使用具有低沸点的致冷剂的情况下冷却到其水露点以下,并且随后在二氧化碳压缩机(40)中被压缩。
25.按权利要求23或24所述的方法,其特征在于,在包括空气压缩机(24)、扩展器(42)及二氧化碳压缩机(40)的叶轮机械关断或失灵后并且在关闭所述截止阀/调节阀(46)后,所述蒸汽发生器(1)用新鲜空气通过所述空气输入管路(21)来运行。
26.按权利要求23到25中任一项所述的方法,其特征在于,在所述蒸汽发生设备的检验时间里,使所述与蒸汽发生器(1)并联的装置在安装作业结束后进行短接。
27.按权利要求24所述的方法,其特征在于,在所述二氧化碳压缩机(40)中,所述主要由二氧化碳和少量水组成的烟气压缩到对下一个用途来说所必需的排出压力。
28.按权利要求24到27中任一项所述的方法,其特征在于,所述空气压缩机(24)的中间冷却热量及后冷却热量通过所述朗肯循环过程(44)与所述连接管路(44’)、换热器(43)及扩展器(42)相关联,由此产生额外的用于所述二氧化碳压缩机(40)的驱动能量。
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RU2380548C2 (ru) 2010-01-27
US20100132360A1 (en) 2010-06-03
JP2008545945A (ja) 2008-12-18
RU2007149248A (ru) 2009-07-20
CN101203660B (zh) 2013-07-24
US7861526B2 (en) 2011-01-04
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