CN107076023B - 用于启动具有排气再循环的燃气涡轮机系统传动系的方法和系统 - Google Patents
用于启动具有排气再循环的燃气涡轮机系统传动系的方法和系统 Download PDFInfo
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Classifications
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- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
- F01D19/02—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith dependent on temperature of component parts, e.g. of turbine-casing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/34—Gas-turbine plants characterised by the use of combustion products as the working fluid with recycling of part of the working fluid, i.e. semi-closed cycles with combustion products in the closed part of the cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/26—Starting; Ignition
- F02C7/268—Starting drives for the rotor, acting directly on the rotor of the gas turbine to be started
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/70—Application in combination with
- F05D2220/72—Application in combination with a steam turbine
- F05D2220/722—Application in combination with a steam turbine as part of an integrated gasification combined cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/70—Application in combination with
- F05D2220/76—Application in combination with an electrical generator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
在一个实施例中,一种系统包括传动系起动器系统。传动系起动器系统包括发电机和励磁系统,发电机机械地耦合至燃气涡轮机系统的传动系,励磁系统电耦合至发电机并被配置为提供磁场。传动系起动器系统还包括负载换相逆变器(LCI)和控制器,LCI电耦合至发电机并被配置为提供电功率至发电机,控制器可通信地耦合至发电机、励磁系统和LCI。控制器被配置为经由LCI和发电机启动传动系达小于传动系操作转速,其中,发电机将电转换为机械运动;经由燃气涡轮机驱动传动系达传动系操作转速;以及经由发电机以传动系操作转速驱动传动系。
Description
相关申请交叉引用
本申请要求2014年6月30日提交的题为“METHOD AND SYSTEM FOR STARTUP OFGAS TURBINE SYSTEM DRIVE TRAINS WITH EXHAUST GAS RECIRCULATION(用于启动具有排气再循环的燃气涡轮机系统传动系的方法和系统)”的美国临时专利申请号62/019,019的优先权和权益,该美国临时专利申请通过引用并入本文用于所有目的。
本申请涉及2012年12月28日提交的题为“STOICHIOMETRIC COMBUSTION CONTROLFOR GAS TURBINE SYSTEM WITH EXHAUST GAS RECIRCULATION(用于具有排气再循环的燃气涡轮机系统的化学计量燃烧控制)”的美国临时专利申请号61/747,209、2012年11月2日提交的题为“SYSTEM AND METHOD FOR DIFFUSION COMBUSTION IN A STOICHIOMETRICEXHAUST GAS RECIRCULATION GAS TURBINE SYSTEM(用于化学计量排气再循环燃气涡轮机系统中的扩散燃烧的系统和方法)”的美国临时专利申请号61/722,118、2012年11月2日提交的题为“SYSTEM AND METHOD FOR DIFFUSION COMBUSTION WITH FUEL-DILUENT MIXINGIN A STOICHIOMETRIC EXHAUST GAS RECIRCULATION GAS TURBINE SYSTEM(用于化学计量排气再循环燃气涡轮机系统中的利用燃料稀释液混合的扩散燃烧的系统和方法)”的美国临时专利申请号61/722,115、2012年11月2日提交的题为“SYSTEM AND METHOD FORDIFFUSION COMBUSTION WITH OXIDANT-DILUENT MIXING IN A STOICHIOMETRIC EXHAUSTGAS RECIRCULATION GAS TURBINE SYSTEM(用于化学计量排气再循环燃气涡轮机系统中的利用氧化剂稀释液混合的扩散燃烧的系统和方法)”的美国临时专利申请号61/722,114、以及2012年11月2日提交的题为“SYSTEM AND METHOD FOR LOAD CONTROL WITH DIFFUSIONCOMBUSTION IN A STOICHIOMETRIC EXHAUST GAS RECIRCULATION GAS TURBINE SYSTEM(用于化学计量排气再循环燃气涡轮机系统中的具有扩散燃烧的负载控制的系统和方法)”的美国临时专利申请号61/722,111,以上美国临时专利申请全部通过引用并入本文用于所有目的。
技术领域
本文公开的主题涉及燃气涡轮发动机,且更具体地,涉及燃气涡轮机的燃烧系统的控制系统和方法。
背景技术
燃气涡轮发动机应用领域广泛,例如发电、飞行器以及各种机器。燃气涡轮发动机通常在燃烧器部利用氧化剂(例如,空气)燃烧燃料以生成热燃烧产物,热燃烧产物然后驱动涡轮机部中的一个或更多个涡轮机级。进而,涡轮机部驱动压缩机部中的一个或更多个压缩机级,从而将氧化剂连同燃料一起从入口压缩到燃烧器部中。再者,燃料与氧化剂在燃烧器部中混合,并接着燃烧以产生热燃烧产物。燃气涡轮发动机通常沿着燃烧器部的燃烧室上游的一个或更多个流动路径预混合燃料和氧化剂,并随后燃烧燃料和氧化剂以生成可用功率。遗憾的是,预混合火焰很难控制或维持,其能够影响各种排气排放和功率要求。此外,燃气涡轮发动机通常消耗作为氧化剂的大量空气,并输出大量排气至大气。换句话说,排气通常作为燃气涡轮机操作的副产物被浪费。
发明内容
在下面概述范围与最初要求保护的本发明匹配的某些实施例。这些实施例并不旨在限制要求保护的本发明的范围,而是这些实施例仅旨在提供本发明可能形式的简短概括。实际上,本发明可涵盖与下面阐述的实施例类似或不同的各种形式。
在第一实施例中,一种系统包括传动系起动器系统。传动系起动器系统包括发电机和励磁系统,发电机机械耦合至燃气涡轮机系统的传动系,励磁系统电耦合至发电机并被配置为提供磁场。传动系起动器系统还包括负载换相逆变器(LCI)和控制器,LCI电耦合至发电机并被配置为提供电功率至发电机,控制器可通信地耦合至发电机、励磁系统和LCI。控制器被配置为经由LCI和发电机启动传动系达小于传动系自持转速,其中,发电机将电转换为机械运动;经由燃气涡轮机驱动传动系达传动系自持转速;以及经由发电机以传动系自持转速驱动传动系。
在第二实施例中,一种用于启动排气再循环燃气涡轮机系统的传动系的方法包括经由负载换相逆变器(LCI)启动传动系,LCI电耦合至发电机并被配置为提供电功率至发电机,使得发电机将电功率转换为机械功率,以及一旦发电机已经达到第一传动系转速,则点火燃气涡轮机以启动燃气涡轮机。方法还包括加载燃气涡轮机以达到第二传动系转速以及卸载LCI,并且当达到第二传动系转速时,断开LCI。方法还包括使发电机与标准电力网频率的电力网同步,并经由发电机以第二转速驱动传动系。
在第三实施例中,一种控制系统包括处理器,其被配置为经由负载换相逆变器(LCI)启动排气再循环燃气涡轮机系统的传动系,LCI电耦合至发电机并被配置为提供电功率至发电机,使得发电机将电功率转换为机械功率。处理器被进一步配置为一旦发电机已经达到第一传动系转速,则点火燃气涡轮机以启动燃气涡轮机,以及加载燃气涡轮机以达到第二传动系转速。处理器还被配置为卸载LCI,并且当达到第二传动系转速时,断开LCI,以及使发电机与标准电力网频率的电力网同步。处理器还被配置为经由发电机以第二转速驱动传动系。
附图说明
当参照附图阅读下列具体实施方式时,本发明的这些和其它特征、方面和优点将变得更加容易理解,其中,贯穿附图,相同符号表示相同部件,其中:
图1为具有联接到碳氢化合物生产系统的基于涡轮机的服务系统的系统的实施例的示意图;
图2为图1的系统的实施例的示意图,该图进一步示出控制系统和组合循环系统;
图3为图1和图2的系统的实施例的示意图,其进一步示出燃气涡轮发动机、排气供应系统和排气处理系统的细节;
图4为用于运行图1至图3的系统的过程的实施例的流程图;
图5为适于由图1至图3的控制系统使用的基于模型的控制系统的实施例的示意图;和
图6为适于控制图1至图3的基于涡轮机的系统的过程的实施例的流程图。
具体实施方式
本发明的一个或更多个具体实施例将在下面描述。在努力提供这些实施例的简要描述中,实际实施方式的所有特征可不在本说明书中进行描述。应当明白,在作为任何工程或设计项目的任何此类实际实施方式的开发中,必须做出众多与实施方式相关的决定以实现开发者的指定目标,诸如符合在不同实施方式中彼此不同的系统相关和商业相关约束。而且,应当明白,此类开发工作可能是复杂和费时的,然而,对本领域的普通技术人员来说,承担具有本公开益处的设计、制作和制造仍然是例行工作。
当介绍本发明的各种实施例的元素时,冠词“一个”、“一种”、“该”和“所述”旨在意为存在一个或更多个元素。术语“包含”、“包括”和“具有”旨在为包含的且意为可以有附加元素而不仅是所列的。
如下面所详细论述的,所公开的实施例大体涉及具有排气再循环(EGR)的燃气涡轮机系统,且特别地,涉及使用EGR的燃气涡轮机系统的化学计量操作。例如,燃气涡轮机系统可被配置成沿排气再循环路径再循环排气,连同至少一些再循环排气一起化学计量燃烧燃料和氧化剂,并捕集排气用于各种目标系统。排气再循环连同化学计量燃烧可帮助增加排气中二氧化碳(CO2)的浓度水平,该排气然后能够被后处理以分离和提纯CO2和氮气(N2)以用于各种目标系统。燃气涡轮机系统也可采用沿排气再循环路径的各种排气处理(例如,热回收、催化反应等),从而增加CO2的浓度水平、减少其它排放(例如,一氧化碳、氮氧化物以及未燃烧碳氢化合物)的浓度水平并增加能量回收(例如,用热回收单元)。此外,燃气涡轮发动机可被配置成用一个或更多个扩散火焰(例如,使用扩散燃料喷嘴)、预混火焰(例如,使用预混合燃料喷嘴)或它们的任何组合来燃烧燃料和氧化剂。在某些实施例中,扩散火焰可帮助将稳定性和操作保持在化学计量燃烧的特定限度内,这进而有助于增加CO2的产量。例如,与用预混合火焰运行的燃气涡轮机系统相比,用扩散火焰运行的燃气涡轮机系统可实现更大量的EGR。EGR的增加量继而帮助增加CO2产量。可能的目标系统包含管道、储罐、固碳(carbon sequestration)系统,以及碳氢化合物生产系统,诸如提高原油采收率(EOR)系统。
本文所述的系统和方法提供排气(EG)处理系统(如,排气再循环回路),其适于吸入流体(如,涡轮机排气)通过热回收蒸汽发生(HRSG)系统,调节通过再循环鼓风机的流体压力,和/或冷却通过EGR冷却器的流体以再循环地递送至涡轮机系统压缩机。因此,通过EG处理系统的压力比可以经调节以改善通过涡轮机系统的产生功率和/或可以改善产品气的产生,如下面更详细描述的。还提供控制系统,其适于控制本文所述各种系统,包括EG处理系统。例如,控制系统可调节包括在再循环鼓风机中的叶片,以及其他调节,以调节排气再循环回路内的压力。
图1为具有与基于涡轮机的服务系统14相关联的碳氢化合物生产系统12的系统10的实施例的示意图。如下面进一步详细论述的,基于涡轮机的服务系统14的各个实施例被配置成向碳氢化合物生产系统12提供各种服务,诸如电力、机械功率和流体(例如,排气),以促进油和/或气生产或回收。在所示出的实施例中,碳氢化合物生产系统12包含油/气抽取系统16和联接到地下储层20(例如,油、气或碳氢化合物储层)的提高原油采收率(EOR)系统18。油/气抽取系统16包含各种地面设备22,诸如联接到油/气井26的采油树或生产树24。而且,井26可包含一个或更多个管件28,其延伸通过地球32中的钻孔30至地下储层20。树24包含一个或更多个阀、油嘴、隔离套、防喷器以及各种流量控制装置,其调节压力并控制到地下储层20和来自该地下储层20的流量。树24通常被用于控制从地下储层20流出的生产流体(例如,油或气)的流量,而EOR系统18可通过将一种或更多种流体喷射到地下储层20中以增加油或气的生产。
因此,EOR系统18可包含流体喷射系统34,其具有一个或更多个管件36,该一个或更多个管件36延伸通过地球32中的孔38至地下储层20。例如,EOR系统18可以将一种或更多种流体40例如气体、蒸汽、水、化学物或其任何组合传送到流体喷射系统34中。例如,如下面所进一步详细论述的,EOR系统18可被联接到基于涡轮机的服务系统14,使得系统14将排气42(例如,基本没有或完全没有氧)传送到EOR系统18以用作喷射流体40。流体喷射系统34将流体40(例如,排气42)传送通过一个或更多个管件36到地下储层20中,如箭头44所指示的。喷射流体40通过与油/气井26的管件28远离偏移距离46的管件36进入地下储层20。因此,喷射流体40置换沉积在地下储层20中的油/气48,并通过碳氢化合物生产系统12的一个或更多个管件28驱动油/气48上升,如箭头50所指示的。如下面所进一步详细论述的,喷射流体40可包括源自基于涡轮机的服务系统14的排气42,该基于涡轮机的服务系统14能够生成在碳氢化合物生产系统12所需的现场排气42。换句话说,基于涡轮机的系统14可同时生成供碳氢化合物生产系统12使用的一种或更多种服务(例如,电力、机械功率、蒸汽、水(例如,淡化水)以及排气(例如,基本没有氧)),从而减少或消除此类服务对外部源的依赖。
在所示出的实施例中,基于涡轮机的服务系统14包含化学计量排气再循环(SEGR)燃气涡轮机系统52和排气(EG)处理系统54。燃气涡轮机系统52可被配置成以化学计量燃烧运行模式(例如,化学计量控制模式)和非化学计量燃烧运行模式(例如,非化学计量控制模式)诸如贫燃料控制模式或富燃料控制模式来运行。在化学计量控制模式中,燃烧通常以燃料和氧化剂的大致化学计量比发生,从而产生大致化学计量燃烧。具体地,化学计量燃烧通常包括在燃烧反应中基本消耗全部的燃料和氧化剂,使得燃烧产物基本没有或完全没有未燃烧燃料和氧化剂。化学计量燃烧的一个量度是当量比,或phi(Φ),其是实际燃料/氧化剂比相对于化学计量燃料/氧化剂比的比。大于1.0的当量比产生燃料和氧化剂的富燃料燃烧,反之,小于1.0的当量比产生燃料和氧化剂的贫燃料燃烧。相比之下,1.0的当量比产生既不是富燃料又不是贫燃料的燃烧,从而使得燃烧反应基本消耗所有的燃料和氧化剂。在本公开实施例的背景下,术语化学计量或基本化学计量可指的是约0.95到约1.05的当量比。不过,所公开的实施例也可包含1.0加上或减去0.01、0.02、0.03、0.04、0.05或更多的当量比。再者,在基于涡轮机的服务系统14中的燃料和氧化剂的化学计量燃烧可产生基本没有未燃烧燃料或氧化剂剩下的燃烧产物或排气(例如,42)。例如,排气42可具有小于1、2、3、4或5体积百分比的氧化剂(例如,氧)、未燃烧燃料或碳氢化合物(例如,HC)、氮氧化物(例如,NOx)、一氧化碳(CO)、硫氧化物(例如,SOx)、氢和其它未完全燃烧产物。通过进一步示例,排气42可以具有小于约每百万份体积的10、20、30、40、50、60、70、80、90、100、200、300、400、500、1000、2000、3000、4000或5000份的氧化剂(例如,氧)、未燃烧燃料或碳氢化合物(例如,HC)、氮氧化物(例如,NOx)、一氧化碳(CO)、硫氧化物(例如,SOx)、氢和其它未完全燃烧产物的量。不过,所公开实施例也可在排气42中产生其它范围的残留燃料、氧化剂和其它排放水平。如本文所使用的,术语排放、排放水平和排放目标可指的是特定燃烧产物(例如,NOx、CO、SOx、O2、N2、H2、HC等)的浓度水平,其可以存在于再循环气体流、排出的气体流(例如,排放到大气中)以及用于各种目标系统(例如,碳氢化合物生产系统12)中的气体流中。
虽然不同实施例中的SEGR燃气涡轮机系统52和EG处理系统54可包含各种部件,但是所示出的EG处理系统54包括接收和处理源自SEGR燃气涡轮机系统52的排气60的热回收蒸汽发生器(HRSG)56以及排气再循环(EGR)系统58。HRSG 56可以包括一个或更多个热交换器、冷凝器和各种热回收设备,所述设备集中起将排气60的热传递给水流从而生成蒸汽62的作用。蒸汽62可被用在一个或更多个蒸汽涡轮机、EOR系统18或碳氢化合物生产系统12的任何其他部分中。例如,HRSG 56可以生成低压、中压和/或高压蒸汽62,其可以被选择性应用于低压、中压和高压蒸汽涡轮机级或EOR系统18的不同应用。除了蒸汽62之外,处理水64(例如,淡化水)可以通过HRSG 56、EGR系统58和/或EG处理系统54的其他部分或SEGR燃气涡轮机系统52生成。处理水64(例如,淡化水)在例如内陆或沙漠地区的水短缺区域会是特别有用的。处理水64可以至少部分由于驱动SEGR燃气涡轮机系统52内燃料燃烧的大体积空气生成。虽然蒸汽62和水64的现场生成可能在许多应用中是特别有益的(包含碳氢化合物生产系统12),排气42、60的现场生成对EOR系统18可能是特别有益的,这是由于来源于SEGR燃气涡轮机系统52的其低氧含量、高压和热。因此,HRSG 56、EGR系统58和/或EG处理系统54的另一部分可输出排气66或将排气66再循环到SEGR燃气涡轮机系统52中,同时还将排气42传送到EOR系统18以与碳氢化合物生产系统12一起使用。同样,排气42可从SEGR燃气涡轮机系统52直接抽取(即,没有经过EG处理系统54),以用于碳氢化合物生产系统12的EOR系统18。
排气再循环通过EG处理系统54的EGR系统58来处理。例如,EGR系统58包含一个或更多个管道、阀、鼓风机、排气处理系统(例如,过滤器、微粒去除单元、气体分离单元、气体净化单元、热交换器、热回收单元、水分去除单元、催化剂单元、化学品喷射单元或它们的任何组合)以及控制装置,以将排气沿排气再循环路径从SEGR燃气涡轮机系统52的输出端(例如,排放的排气60)再循环到输入端(例如,进气排气66)。在所示出的实施例中,SEGR燃气涡轮机系统52将排气66吸入到具有一个或更多个压缩机的压缩机部,从而将排气66压缩连同氧化剂68和一个或更多个燃料70的吸气供燃烧室部使用。氧化剂68可包括环境空气、纯氧、富氧空气、氧减少空气、氧-氮混合物或促进燃料70燃烧的任何合适氧化剂。燃料70可包括一种或更多种气体燃料、液体燃料或它们的任何组合。例如,燃料70可包括天然气、液化天然气(LNG)、合成气、甲烷、乙烷、丙烷、丁烷、石脑油、煤油、柴油、乙醇、甲醇、生物燃料或它们的任何组合。
SEGR燃气涡轮机系统52在燃烧器部中混合并燃烧排气66、氧化剂68和燃料70,从而生成热燃烧气体或排气60,以驱动涡轮机部中的一个或更多个涡轮机级。在某些实施例中,在燃烧器部中的每个燃烧器包含一个或更多个预混合燃料喷嘴、一个或更多个扩散燃料喷嘴或它们的任何组合。例如,每个预混合燃料喷嘴可被配置成混合在燃料喷嘴内和/或部分在该燃料喷嘴上游的氧化剂68和燃料70,从而将氧化剂燃料混合物从燃料喷嘴喷射到用于预混合燃烧(例如,预混合火焰)的燃烧区中。通过进一步示例,每个扩散燃料喷嘴可被配置成将燃料喷嘴内的氧化剂68流与燃料70流隔离,从而将来自燃料喷嘴的氧化剂68和燃料70分别喷射到用于扩散燃烧(例如,扩散火焰)的燃烧区中。具体地,通过扩散燃料喷嘴提供的扩散燃烧延迟氧化剂68与燃料70的混合,直到初始燃烧点,即火焰区域。在采用扩散燃料喷嘴的实施例中,扩散火焰可提供增加的火焰稳定性,因为扩散火焰通常在氧化剂68与燃料70的单独流之间的化学计量点(即,在氧化剂68与燃料70在混合时)处形成。在某些实施例中,一种或更多种稀释剂(例如,排气60、蒸汽、氮或另一惰性气体)可在扩散燃料喷嘴或预混合燃料喷嘴中与氧化剂68、燃料70或两者预混合。此外,一种或更多种稀释剂(例如,排气60、蒸汽、氮或另一惰性气体)可在每个燃燃烧器内的燃烧点处或在其下游被喷射到燃烧器中。使用这些稀释剂可帮助调剂火焰(例如,预混合火焰或扩散火焰),从而帮助减少NOx(诸如一氧化氮(NO)和二氧化氮(NO2))排放。与火焰的类型无关,燃烧产生热燃烧气体或排气60,以驱动一个或更多个涡轮机级。在每个涡轮机级被排气60驱动时,SEGR燃气涡轮机系统52生成机械功率(M)72和/或电力(E)74(例如,经由发电机)。系统52也输出排气60,并且可进一步输出水64。再者,水64可为处理水,诸如淡化水,这在各种现场或非现场应用中是有用的。
排气抽取也由使用一个或更多个抽取点76的SEGR燃气涡轮机系统52提供。例如,所示出的实施例包含具有排气(EG)抽取系统80和排气(EG)处理系统82的排气(EG)供应系统78,其从抽取点76接收排气42、处理排气42并接着向各个目标系统供应或分配排气42。目标系统可包含EOR系统18和/或其它系统,诸如管道86、储罐88或固碳系统90。EG抽取系统80可包含一个或更多个管道、阀、控制装置和流分离件,这促进排气42与氧化剂68、燃料70以及其它杂质的隔离,同时也控制被抽取排气42的温度、压力和流率。EG处理系统82可包含一个或更多个热交换器(例如,热回收单元,诸如热回收蒸汽发生器、冷凝器、冷却器或加热器)、催化剂系统(例如,氧化催化剂系统)、微粒和/或水去除系统(例如,气体脱水单元、惯性分离器、聚结过滤器、不透水过滤器以及其它过滤器)、化学品喷射系统、溶剂型处理系统(例如,吸收剂、闪蒸罐等)、碳捕集系统、气体分离系统、气体净化系统和/或溶剂型处理系统、排气压缩机或它们的任何组合。EG处理系统82的这些子系统能够控制温度、压力、流率、水分含量(例如,水去除量)、微粒含量(例如,微粒去除量)以及气体成分(例如,CO2、N2等的百分比)。
根据目标系统,被抽取排气42通过EG处理系统82的一个或更多个子系统进行处理。例如,EG处理系统82可引导全部或部分排气42通过碳捕集系统、气体分离系统、气体净化系统和/或溶剂型处理系统,其被控制以分离和净化含碳气体(例如,二氧化碳)92和/或氮气(N2)94以供各种目标系统使用。例如,EG处理系统82的实施例可执行气体分离和净化以产生排气42的多个不同流95,诸如第一流96、第二流97和第三流98。第一流96可具有富二氧化碳和/或贫氮气(例如,富CO2贫N2流)的第一成分。第二流97可具有含有在中间浓度水平的二氧化碳和/或氮气(例如,中间浓度CO2、N2流)的第二成分。第三流98可具有贫二氧化碳和/或富氮气(例如,贫CO2富N2流)的第三成分。每个流95(例如,96、97和98)可包含气体脱水单元、过滤器、气体压缩机或它们的任何组合,以促进流95输送到目标系统。在某些实施例中,富CO2贫N2流96可具有大于约70、75、80、85、90、95、96、97、98或99体积百分比的CO2纯度或浓度水平,以及小于约1、2、3、4、5、10、15、20、25或30体积百分比的N2纯度或浓度水平。相反,贫CO2富N2流98可具有小于约1、2、3、4、5、10、15、20、25或30体积百分比的CO2纯度或浓度水平,以及大于约70、75、80、85、90、95、96、97、98或99体积百分比的N2纯度或浓度水平。中间浓度的CO2、N2流97可具有在约30到70、35到65、40到60或45到55体积百分比之间的CO2纯度或浓度水平和/或N2纯度或浓度水平。不过前述范围仅仅是非限制性示例,富CO2贫N2流96和贫CO2富N2流98可特别适合与EOR系统18和其它系统84一起使用。不过,这些富、贫或中间浓度CO2流95中的任何一个可单独或以各种组合与EOR系统18和其它系统84一起使用。例如,EOR系统18和其它系统84(例如,管道86、储罐88、以及固碳系统90)中的每个可以接收一个或更多个富CO2贫N2流96、一个或更多个贫CO2富N2流98、一个或更多个中间浓度CO2、N2流97、以及一个或更多个未处理的排气42流(即,绕过EG处理系统82)。
EG抽取系统80沿压缩机部、燃烧器部和/或涡轮机部在一个或更多个抽取点76处抽取排气42,使得排气42可以以合适温度和压力用在EOR系统18和其它系统84中。EG抽取系统80和/或EG处理系统82还可以循环流体流(例如,排气42)向EG处理系统54和从EG处理系统54循环流体流。例如,经过EG处理系统54的排气42的一部分可以被EG抽取系统80抽取以用于EOR系统18和其它系统84中。在某些实施例中,EG供应系统78和EG处理系统54可彼此独立或集成在一起,并因此可使用单独或共同的子系统。例如,EG处理系统82可被EG供应系统78和EG处理系统54两者使用。从EG处理系统54抽取的排气42可经历多级气体处理,诸如在EG处理系统54中的一个或更多个气体处理级,接着是EG处理系统82中的一个或更多个气体处理附加级。
在每个抽取点76处,由于在EG处理系统54中的基本上化学计量燃烧和/或气体处理,被抽取排气42可基本不含氧化剂68和燃料70(例如,未燃烧的燃料或碳氢化合物)。而且,根据目标系统,被抽取排气42可在EG供应系统78的EG处理系统82中经受进一步处理,从而进一步降低任何残留氧化剂68、燃料70或其它不良燃烧产物。例如,在EG处理系统82中的处理之前或之后,被抽取排气42可具有小于1、2、3、4或5体积百分比的氧化剂(例如,氧)、未燃烧燃料或碳氢化合物(例如,HC)、氮氧化物(例如,NOx)、一氧化碳(CO)、硫氧化物(例如,SOx)、氢和其它未完全燃烧产物。通过进一步示例,在EG处理系统82中的处理之前或之后,被抽取排气42可以具有小于约每百万份体积的10、20、30、40、50、60、70、80、90、100、200、300、400、500、1000、2000、3000、4000或5000份的氧化剂(例如,氧)、未燃烧燃料或碳氢化合物(例如,HC)、氮氧化物(例如,NOx)、一氧化碳(CO)、硫氧化物(例如,SOx)、氢和其他未完全燃烧产物。因此,排气42特别适合与EOR系统18一起使用。
涡轮机系统52的EGR运行具体使能在多个位置76处的排气抽取可行。例如,系统52的压缩机部可被用于压缩没有任何氧化剂68的排气66(即,只压缩排气66),使得基本上无氧排气42可在输入氧化剂68和燃料70之前从压缩机部和/或燃烧器部抽取。抽取点76可被定位在毗邻压缩机级之间的级间端口处、在沿压缩机排气套管的端口处、在沿燃烧器部中的每个燃烧器的端口处或它们的任何组合。在某些实施例中,排气66可不与氧化剂68和燃料70混合,直到其到达燃烧器部中的每个燃烧器的盖端部和/或燃料喷嘴。而且,一个或更多个流动隔板(例如,壁、分隔器、挡板等)可被用于将氧化剂68和燃料70与抽取点76隔离。通过这些流动隔板,抽取点76可沿燃烧器部中每个燃烧器的壁直接布置。
一旦排气66、氧化剂68和燃料70流过该盖端部(例如,通过燃料喷嘴)进入每个燃烧器的燃烧部分(例如,燃烧腔室)中,SEGR燃气涡轮机系统52被控制提供排气66、氧化剂68和燃料70的大致化学计量燃烧。例如,系统52可保持约0.95到约1.05的当量比。结果,在每个燃烧器中的排气66、氧化剂68和燃料70的混合物的燃烧产物基本是没有氧和未燃烧燃料。因此,燃烧产物(或排气)可从SEGR燃气涡轮机系统52的涡轮机部被抽取以用作被传送到EOR系统18的排气42。沿涡轮机部,抽取点76可被设置在任何涡轮机级处,例如毗邻涡轮机级之间的级间端口处。因此,通过使用任何前述抽取点76,基于涡轮机的服务系统14可生成排气42、抽取排气42并输送排气42到碳氢化合物生产系统12(例如,EOR系统18)以用于地下储层20的油/气48生产。
图2为图1系统10的实施例的示意图,该图示出被联接到基于涡轮机的服务系统14和碳氢化合物生产系统12的控制系统100。在所示出的实施例中,基于涡轮机的服务系统14包含组合循环系统102,该组合循环系统102包含作为顶循环(topping cycle)的SEGR燃气涡轮机系统52、作为底循环(bottoming cycle)的蒸汽涡轮机104、和HRSG 56以从排气60回收热量以生成用于驱动蒸汽涡轮机104的蒸汽62。再者,SEGR燃气涡轮机系统52接收、混合并化学计量燃烧排气66、氧化剂68和燃料70(例如,预混合火焰和/或扩散火焰),从而产生排气60、机械功率72、电力74和/或水64。例如,SEGR燃气涡轮机系统52可驱动一个或更多个负载或机器106,诸如发电机、氧化剂压缩机(例如,主空气压缩机)、齿轮箱、泵、碳氢化合物生产系统12的设备或它们的任何组合。在一些实施例中,机器106可包含其它驱动件,诸如与SEGR燃气涡轮机系统52串联的电动马达或蒸汽涡轮机(例如,蒸汽涡轮机104)。因此,由SEGR燃气涡轮机系统52(以及任何附加驱动件)驱动的机器106的输出可包含机械功率72和电力74。机械功率72和/或电力74可用于向碳氢化合物生产系统12现场提供动力,电力74可被分配到电网或它们的任何组合。机器106的输出还可包含压缩流体,诸如用于吸入到SEGR燃气涡轮机系统52的燃烧部中的压缩氧化剂68(例如,空气或氧)。这些输出中的每个(例如,排气60、机械功率72、电力74和/或水64)可被认为是基于涡轮机的服务系统14的服务。
SEGR燃气涡轮机系统52产生可基本不含氧的排气42、60,并且将这种排气42、60传送到EG处理系统54和/或EG供应系统78。EG供应系统78可处理排气42(例如,流95)并将其输送到碳氢化合物生产系统12和/或其它系统84。如上所讨论的,EG处理系统54可包含HRSG56和EGR系统58。HRSG 56可包含一个或更多个热交换器、冷凝器和各种热回收设备,该热回收设备可被用于回收排气60的热或将该热传递给水108以生成用于驱动蒸汽涡轮机104的蒸汽62。类似于SEGR燃气涡轮机系统52,蒸汽涡轮机104可驱动一个或更多个负载或机器106,从而生成机械功率72和电力74。在所示出的实施例中,SEGR燃气涡轮机系统52和蒸汽涡轮机104被串联布置以驱动相同的机器106。不过,在另一些实施例中,SEGR燃气涡轮机系统52和蒸汽涡轮机104可单独驱动不同的机器106,以独立生成机械功率72和/或电力74。在蒸汽涡轮机104被来自HRSG 56的蒸汽62驱动时,蒸汽62的温度和压力逐渐减小。因此,蒸汽涡轮机104将使用过的蒸汽62和/或水108再循环回到HRSG 56中,以用于经由排气60的热回收生成另外的蒸汽。除了蒸汽生成之外,HRSG 56、EGR系统58和/或EG处理系统54的另一个部分可产生水64、与碳氢化合物生产系统12一起使用的排气42、以及用作至SEGR燃气涡轮机系统52的输入的排气66。例如,水64可为处理水64,诸如用于其它应用中的淡化水。淡化水在低可用水量的地区是特别有用的。关于排气60,EG处理系统54的实施例可被配置成通过EGR系统58再循环排气60,排气60可经过或不经过HRSG 56。
在所示出的实施例中,SEGR燃气涡轮机系统52具有排气再循环路径110,该排气再循环路径110从系统52的排气出口延伸到排气入口。沿着路径110,排气60经过EG处理系统54,在所示出的实施例中,EG处理系统54包含HRSG 56和EGR系统58。EGR系统58可包含沿路径110串联和/或并联布置的一个或更多个管道、阀、鼓风机、气体处理系统(例如,过滤器、微粒去除单元、气体分离单元、气体净化单元、热交换器、诸如热回收蒸汽发生器的热回收单元、水分去除单元、催化剂单元、化学品喷射单元或它们的任何组合)。换句话说,EGR系统58可包含沿在系统52的排气出口与排气入口之间的排气再循环路径110的任何流控制部件、压力控制部件、温度控制部件、水分控制部件和气体成分控制部件。因此,在具有沿路径110的HRSG56的实施例中,HRSG 56可被认为是EGR系统58的部件。不过,在某些实施例中,HRSG 56可沿独立于排气再循环路径110的排气路径设置。不管HRSG 56是否沿着单独路径或与EGR系统58共用的路径,HRSG 56和EGR系统58吸入排气60并输出再循环排气66、与EG供应系统78(例如,用于碳氢化合物生产系统12和/或其它系统84)一起使用的排气42、或另一种排气输出。再者,SEGR燃气涡轮机系统52吸入、混合和化学计量燃烧排气66、氧化剂68和燃料70(例如,预混合火焰和/或扩散火焰),以产生用于分配到EG处理系统54、碳氢化合物生产系统12或其它系统84的基本不含氧和不含燃料的排气60。
如上面参照图1所指出的,碳氢化合物生产系统12可包含各种设备,以促进通过油/气井26从地下储层20回收或生产油/气48。例如,碳氢化合物生产系统12可包含具有流体喷射系统34的EOR系统18。在所示出的实施例中,流体喷射系统34包含排气喷射EOR系统112和蒸汽喷射EOR系统114。虽然流体喷射系统34可从各种源接收流体,但是所示出的实施例可从基于涡轮机的服务系统14接收排气42和蒸汽62。由基于涡轮机的服务系统14产生的排气42和/或蒸汽62也可被传送到碳氢化合物生产系统12以用于其它油/气系统116。
排气42和/或蒸汽62的数量、质量和流量可通过控制系统100来控制。控制系统100可完全专用于基于涡轮机的服务系统14,或控制系统100也可以可选提供用于控制碳氢化合物生产系统12和/或其它系统84的控制装置(或促进控制的至少某些数据)。在所示出的实施例中,控制系统100包含控制器118,其具有处理器120、存储器122、蒸汽涡轮机控制装置124、SEGR燃气轮机系统控制装置126和机器控制装置128。处理器120可包含单一处理器或两个或更多个冗余处理器,诸如用于控制基于涡轮机的服务系统14的三重冗余处理器。存储器122可包含易失性和/或非易失性存储器。例如,存储器122可包含一个或更多个硬盘驱动器、闪存、只读存储器、随机存取存储器或它们的任何组合。控制装置124、126和128可包含软件和/或硬件控制装置。例如,控制装置124、126和128可包含存储在存储器122中并可由处理器120执行的各种指令或代码。控制装置124被配置成控制蒸汽涡轮机104的运行,SEGR燃气涡轮机系统控制装置126被配置成控制系统52,以及机器控制装置128被配置成控制机器106。因此,控制器118(例如,控制装置124、126和128)可被配置成协调基于涡轮机的服务系统14的各种子系统,以向碳氢化合物生产系统12提供合适的排气42的流。
在控制系统100的某些实施例中,在附图中示出或在本文中描述的每个元件(例如,系统、子系统和部件)包含(例如,直接在这类元件内、在这类元件上游或下游)一个或更多个工业控制特征件,诸如传感器和控制装置,该工业控制特征件在工业控制网络上连同控制器118一起是彼此通信联接的。例如,与每个元件相关联的控制装置可包含专用装置控制器(例如,包含处理器、存储器和控制指令)、一个或更多个致动器、阀、开关和工业控制设备,其基于传感器反馈130、来自控制器118的控制信号、来自用户的控制信号或它们的任何组合进行控制。因此,本文描述的任何控制功能可用控制指令实现,该控制指令由控制器118、与每个元件关联的专用装置控制器或它们的组合存储和/或执行。
为了促进此类控制功能,控制系统100包含在整个系统10中分布的一个或更多个传感器,以获得用于执行各种控制装置,例如控制装置124、126和128的传感器反馈130。例如,传感器反馈130可从传感器获得,该传感器分布在整个SEGR燃气涡轮机系统52、机器106、EG处理系统54、蒸汽涡轮机104、碳氢化合物生产系统12中,或分布在整个基于涡轮机的服务系统14或碳氢化合物生产系统12的任何其它部件中。例如,传感器反馈130可包含温度反馈、压力反馈、流率反馈、火焰温度反馈、燃烧动力学反馈、吸入氧化剂成分反馈、吸入燃料成分反馈、排气成分反馈、机械功率72的输出水平、电力74的输出水平、排气42、60的输出量、水64的输出量或质量或它们的任何组合。例如,传感器反馈130可包含排气42、60的组成,以促进在SEGR燃气涡轮机系统52中的化学计量燃烧。例如,传感器反馈130可包含来自沿氧化剂68的氧化剂供应路径的一个或更多个吸入氧化剂传感器、沿燃料70的燃料供应路径的一个或更多个吸入燃料传感器和沿排气再循环路径110和/或在SEGR燃气涡轮机系统52内布置的一个或更多个排气排放传感器的反馈。吸入氧化剂传感器、吸入燃料传感器和排气排放传感器可包含温度传感器、压力传感器、流率传感器和组成传感器。排放传感器可包含用于氮氧化物的传感器(例如,NOx传感器)、用于碳氧化物的传感器(例如,CO传感器和CO2传感器)、用于硫氧化物的传感器(例如,SOx传感器)、用于氢的传感器(例如,H2传感器)、用于氧的传感器(例如,O2传感器)、用于未燃烧碳氢化合物的传感器(例如,HC传感器)、或用于未完全燃烧的其它产物的传感器,或它们的任何组合。
通过使用这种反馈130,控制系统100可调节(例如,增加、减少或保持)排气66、氧化剂68和/或燃料70至SEGR燃气涡轮机系统52(除了其它运行参数以外)的进气流量,以将当量比保持在合适范围内,例如在约0.95到约1.05之间、在约0.95到约1.0之间、在约1.0到约1.05之间或大致在1.0。例如,控制系统100可分析反馈130以监测排气排放(例如,氮氧化物、诸如CO和CO2的碳氧化物、硫氧化物、氢、氧、未燃烧碳氢化合物和未完全燃烧的其它产物的浓度水平)和/或确定当量比,并接着控制一个或更多个部件以调节排气排放(例如,排气42的浓度水平)和/或当量比。受控部件可包含参照附图示出和描述的任何部件,其包含但不限于,沿氧化剂68、燃料70和排气66的供应路径的阀;氧化剂压缩机、燃料泵或在EG处理系统54中的任何部件;SEGR燃气涡轮机系统52的任何部件;或它们的任何组合。受控部件可调节(例如,增加、减少或保持)在SEGR燃气涡轮机系统52内燃烧的氧化剂68、燃料70和排气66的流率、温度、压力或百分比(例如,当量比)。受控部件也可包含一个或更多个气体处理系统,诸如催化剂单元(例如,氧化催化剂单元)、催化剂单元供应装置(例如,氧化燃料、热量、电力等)、气体净化和/或分离单元(例如,溶剂型分离器、吸收器、闪蒸罐等)以及过滤单元。气体处理系统可帮助减少沿排气再循环路径110、通风口路径(例如,排放到大气中)或到EG供应系统78的抽取路径的各种排气排放。
在某些实施例中,控制系统100可分析反馈130并控制一个或更多个部件以保持或减少排放水平(例如,排气42、60、95的浓度水平)到目标范围,诸如小于每百万份体积约10、20、30、40、50、100、200、300、400、500、1000、2000、3000、4000、5000或10000份(ppmv)。对于排气排放中的每种,例如氮氧化物、一氧化碳、硫氧化物、氢、氧、未燃烧碳氢化合物和未完全燃烧的其它产物的浓度水平,这些目标范围可为相同或不同的。例如,根据当量比,控制系统100可将氧化剂(例如,氧)的排气排放(例如,浓度水平)选择性控制在小于约10、20、30、40、50、60、70、80、90、100、250、500、750或1000ppmv的目标范围内;将一氧化碳(CO)选择性控制在小于约20、50、100、200、500、1000、2500或5000ppmv的目标范围内;以及将氮氧化物(NOX)选择性控制在小于约50、100、200、300、400或500ppmv的目标范围内。在以大致化学计量当量比运行的某些实施例中,控制系统100可将氧化剂(例如,氧)的排气排放(例如,浓度水平)选择性控制在小于约10、20、30、40、50、60、70、80、90或100ppmv的目标范围内;以及将一氧化碳(CO)选择性控制在小于约500、1000、2000、3000、4000或5000ppmv的目标范围内。在以贫燃料当量比(例如,在大约0.95到1.0之间)运行的某些实施例中,控制系统100可将氧化剂(例如,氧)的排气排放(例如,浓度水平)选择性控制在小于约500、600、700、800、900、1000、1100、1200、1300、1400或1500ppmv的目标范围内;将一氧化碳(CO)选择性控制在小于约10、20、30、40、50、60、70、80、90、100、150或200ppmv的目标范围内;以及将氮氧化物(例如,NOx)选择性控制在小于约50、100、150、200、250、300、350或400ppmv的目标范围内。前述目标范围仅仅是示例,并不旨在限制本公开实施例的范围。
控制系统100还可被联接到本地接口132和远程接口134。例如,本地接口132可包含现场设置在基于涡轮机的服务系统14和/或碳氢化合物生产系统12处的计算机工作站。相反,远程接口134可包含不在基于涡轮机的服务系统14和碳氢化合物生产系统12现场设置的计算机工作站,诸如通过互联网连接的计算机工作站。这些接口132和134诸如通过传感器反馈130的一个或更多个图形显示、运行参数等等促进基于涡轮机的服务系统14的监测和控制。
再者,如上所指出的,控制器118包含各种控制装置124、126和128,以促进控制基于涡轮机的服务系统14。蒸汽涡轮机控制装置124可接收传感器反馈130并输出控制命令以促使蒸汽涡轮机104运行。例如,蒸汽涡轮机控制装置124可从HRSG 56、机器106、沿蒸汽62路径的温度和压力传感器、沿水108路径的温度和压力传感器以及指示机械功率72和电力74的各个传感器接收传感器反馈130。同样,SEGR燃气涡轮机系统控制装置126可从沿SEGR燃气涡轮机系统52、机器106、EG处理系统54或它们的任何组合设置的一个或更多个传感器接收传感器反馈130。例如,传感器反馈130可从设置在SEGR燃气涡轮机系统52内部或外部的温度传感器、压力传感器、间隙传感器、振动传感器、火焰传感器、燃料组成传感器、排气组成传感器或它们的任何组合获得。最终,机器控制装置128可以从与机械功率72和电力74关联的各个传感器以及布置在机器106内的传感器接收传感器反馈130。这些控制装置124、126和128中的每个控制装置使用传感器反馈130改善基于涡轮机的服务系统14的运行。
在所示出的实施例中,SEGR燃气涡轮机系统控制装置126可执行指令以控制在EG处理系统54、EG供应系统78、碳氢化合物生产系统12和/或其它系统84中的排气42、60、95的数量和质量。例如,SEGR燃气涡轮机系统控制装置126可将排气60中的氧化剂(例如,氧)和/或未燃烧燃料的水平保持在低于适合于与排气喷射EOR系统112一起使用的阈值。在某些实施例中,阈值水平可为小于排气42、60中的氧化剂(例如,氧)和/或未燃烧燃料的1、2、3、4或5体积百分比;或氧化剂(例如,氧)和/或未燃烧燃料(和其它排气排放)的阈值水平可小于排气42、60中的约每百万份体积的10、20、30、40、50、60、70、80、90、100、200、300、400、500、1000、2000、3000、4000或5000份(ppmv)。通过进一步示例,为了实现这些低水平的氧化剂(例如,氧)和/或未燃烧燃料,SEGR燃气涡轮机系统控制装置126可将在SEGR燃气涡轮机系统52中燃烧的当量比保持在约0.95和约1.05之间。SEGR燃气涡轮机系统控制装置126还可控制EG抽取系统80和EG处理系统82,以将排气42、60、95的温度、压力、流率和气体组成保持在适合用于排气喷射EOR系统112、管道86、储罐88和固碳系统90的范围内。如上所述,EG处理系统82可被控制将排气42净化和/或分离为一种或更多种气体流95,诸如富CO2贫N2流96,中间浓度CO2、N2流97,以及贫CO2富N2流98。除了用于排气42、60和95的控制装置以外,控制装置124、126和128可执行一个或更多个指令以将机械功率72保持在合适动力范围内,或将电力74保持在合适频率和电力范围内。
图3为系统10的实施例的示意图,其进一步示出与碳氢化合物生产系统12和/或其它系统84一起使用的SEGR燃气涡轮机系统52的细节。在所示出的实施例中,SEGR燃气涡轮机系统52包含联接到EG处理系统54的燃气涡轮发动机150。所示出的燃气涡轮发动机150包括压缩机部152、燃烧室器154以及膨胀器部或涡轮机部156。压缩机部152包含一个或更多个排气压缩机或压缩机级158,诸如以串联布置设置的1到20级旋转压缩机叶片。同样,燃烧器部154包含一个或更多个燃烧器160,诸如围绕SEGR燃气涡轮机系统52的旋转轴线162周向分布的1到20个燃烧器160。而且,每个燃烧器160可包含一个或更多个燃料喷嘴164,其被配置成喷射排气66、氧化剂68和/或燃料70。例如,每个燃烧器160的盖端部166可容纳1、2、3、4、5、6个或更多个燃料喷嘴164,其可将排气66、氧化剂68和/或燃料70的流或混合物喷射到燃烧器160的燃烧部分168(例如,燃烧腔室)中。
燃料喷嘴164可包含预混合燃料喷嘴164(例如,其被配置成预混合氧化剂68和燃料70以用于生成氧化剂/燃料预混火焰)和/或扩散燃料喷嘴164(例如,其被配置成喷射氧化剂68和燃料70的单独的流以用于生成氧化剂/燃料扩散火焰)的任何组合。预混合燃料喷嘴164的实施例可包含旋流叶片、混合腔室、或其它特征件,以在喷射到燃烧腔室168中和在燃烧腔室168中燃烧之前,使该氧化剂68和燃料70在喷嘴164内内部混合。预混合燃料喷嘴164还可接收至少一些部分混合的氧化剂68和燃料70。在某些实施例中,每个扩散燃料喷嘴164可隔离氧化剂68与燃料70的流直到喷射点,同时还隔离一种或更多种稀释剂(例如,排气66、蒸汽、氮或另一种惰性气体)的流直到喷射点。在另一些实施例中,每个扩散燃料喷嘴164可隔离氧化剂68与燃料70的流直到喷射点,同时在喷射点之前,部分地混合一种或更多种稀释剂(例如,排气66、蒸汽、氮或另一种惰性气体)与氧化剂68和/或燃料70。此外,一种或更多种稀释剂(例如,排气66、蒸汽、氮或另一种惰性气体)可被喷射到在燃烧区处或其下游的燃烧器中(例如,喷射到燃烧的热产物中),从而帮助减小燃烧的热产物的温度并减少NOx(例如,NO和NO2)的排放。不管燃料喷嘴164的类型,SEGR燃气涡轮机系统52可被控制以提供氧化剂68和燃料70的大致化学计量燃烧。
在使用扩散燃料喷嘴164的扩散燃烧实施例中,燃料70和氧化剂68通常不在扩散火焰的上游混合,而是燃料70和氧化剂68在火焰表面处直接混合和反应,和/或火焰表面存在于燃料70与氧化剂68之间的混合的位置处。具体地,燃料70和氧化剂68单独接近火焰表面(或扩散边界/界面),并接着沿火焰表面(或扩散边界/界面)扩散(例如,经由分子和粘性扩散)以生成扩散火焰。值的注意的是,燃料70和氧化剂68沿该火焰表面(或扩散边界/界面)可以是大致化学计量比的,这可沿该火焰表面产生更大的火焰温度(例如,峰值火焰温度)。与贫燃料或富燃料的燃料/氧化剂比相比,该化学计量燃料/氧化剂比通常产生更大的火焰温度(例如,峰值火焰温度)。因此,扩散火焰可基本上比预混火焰更加稳定,因为燃料70和氧化剂68的扩散帮助保持沿火焰表面的化学计量比(和更大温度)。然而更大的火焰温度也能够导致更大的排气排放,诸如NOx排放,所公开的实施例使用一种或更多种稀释剂帮助控制温度和排放,同时还避免燃料70和氧化剂68的任何预混合。例如,所公开的实施例可引入一种或更多种稀释剂与燃料70和氧化剂68分隔开(例如,在燃烧点之后和/或扩散火焰的下游),从而帮助降低温度和减少由扩散火焰产生的排放(例如,NOx排放)。
如图所示,在运行时,压缩机部152接收并压缩来自EG处理系统54的排气66,并将压缩后的排气170输出到燃烧器部154中的每个燃烧器160。在燃料60、氧化剂68和排气170在每个燃烧器160内燃烧时,附加排气或燃烧产物172(即,燃烧气体)被传送到涡轮机部156。类似于压缩机部152,涡轮机部156包含一个或更多个涡轮机或涡轮机级174,其可包含一系列转动涡轮机叶片。这些涡轮机叶片接着被在燃烧器部154中所生成的燃烧产物172驱动,从而驱动联接到机器106的轴176的转动。再者,机器106可包含联接到SEGR燃气涡轮机系统52的任一端的各种设备,诸如联接到涡轮机部156的机器106、178和/或联接到压缩机部152的机器106、180。在某些实施例中,机器106、178、180可包含一个或更多个发电机、用于氧化剂68的氧化剂压缩机、用于燃料70的燃料泵、齿轮箱或联接到SEGR燃气涡轮机系统52的附加驱动件(例如,蒸汽涡轮机104、电动马达等)。非限制性示例在下面参照表格1进一步详细论述。如图所示,涡轮机部156输出排气60以沿排气再循环路径110从涡轮机部156的排气出口182再循环到排气入口184进入压缩机部152。如上面所详细论述的,沿着排气再循环路径110,排气60经过EG处理系统54(例如,HRSG 56和/或EGR系统58)。
再者,在燃烧器部154中的每个燃烧器160接收、混合并化学计量燃烧压缩的排气170、氧化剂68和燃料70,以产生附加排气或燃烧产物172以驱动涡轮机部156。在某些实施例中,氧化剂68被氧化剂压缩系统186(诸如,具有一个或更多个氧化剂压缩机(MOC)的主氧化剂压缩(MOC)系统(例如,主空气压缩(MAC)系统))压缩。氧化剂压缩系统186包含联接到驱动件190的氧化剂压缩机188。例如,驱动件190可包含电动马达、燃烧发动机或它们的任何组合。在某些实施例中,驱动件190可为涡轮发动机,诸如燃气涡轮发动机150。因此,氧化剂压缩系统186可为机器106的一体部分。换句话说,压缩机188可由被燃气涡轮发动机150的轴176供应的机械功率72直接或间接驱动。在此实施例中,驱动件190可被排除,因为压缩机188依赖涡轮发动机150的功率输出。不过,在采用不止一个氧化剂压缩机的某些实施例中,第一氧化剂压缩机(例如,低压(LP)氧化剂压缩机)可被驱动件190驱动,而轴176驱动第二氧化剂压缩机(例如,高压(HP)氧化剂压缩机),或反之亦然。例如,在另一实施例中,HPMOC被驱动件190驱动,以及LP氧化剂压缩机被轴176驱动。在所示出的实施例中,氧化剂压缩系统186与机器106分隔开。在这些实施例中的每个实施例中,压缩系统186压缩氧化剂68并将该氧化剂供应给燃料喷嘴164和燃烧器160。因此,机器106、178、180中的一些或全部可被配置成增加压缩系统186(例如,压缩机188和/或附加压缩机)的运行效率。
由元件编号106A、106B、106C、106D、106E和106F所指示的机器106的各个部件可在一个或更多个串联布置、并联布置或串联与并联布置的任何组合中沿轴176的线和/或平行于轴176的线设置。例如,机器106、178、180(例如,106A到106F)可包含下列设备以任何次序的任何串联和/或并联布置,该设备包括:一个或更多个齿轮箱(例如,平行轴、行星齿轮箱)、一个或更多个压缩机(例如,氧化剂压缩机、增压压缩机,诸如EG增压压缩机的增压压缩机)、一个或更多个发电单元(例如,发电机)、一个或更多个驱动件(例如,蒸汽涡轮发动机、电动马达)、热交换单元(例如,直接或间接热交换器)、离合器或它们的任何组合。压缩机可包含轴向压缩机、径向或离心压缩机或它们的任何组合,每种压缩机具有一个或更多个压缩级。关于热交换器,直接热交换器可包含喷淋(spray)冷却器(例如,喷淋中间冷却器),其将液体喷淋喷射到气体流中(例如,氧化剂流)以用于直接冷却气体流。间接热交换器可包含将第一流和第二流分隔开的至少一个壁(例如,管壳式热交换器),诸如与冷却剂流(例如,水、空气、制冷剂或任何其它液态或气态冷却剂)分隔开的流体流(例如,氧化剂流),其中,冷却剂流与流体流没有任何直接接触地传递流体流的热。间接热交换器的示例包含中间冷却器、热交换器和热回收单元,诸如热回收蒸汽发生器。热交换器也可包含加热器。如下面进一步详细论述的,这些机器部件中的每个可被用在如在表格1中列出的非限制性示例所指示的各种组合中。
通常,机器106、178、180可被配置成通过例如调节在系统186中的一个或更多个氧化剂压缩机的运行速度、通过冷却和/或抽取过剩电力促进氧化剂68的压缩来增加压缩系统186的效率。本公开的实施例旨在包含在机器106、178、180中以串联和并联布置的前述部件的任何和全部排列,其中,所述部件中的一个、不止一个、全部部件或没有任何部件从轴176获得动力。如下面所示,表格1示出靠近压缩机和涡轮机部152、156设置和/或联接到该压缩机和该涡轮机部的机器106、178、180的布置的一些非限制性示例。
表1
如上面表格1所示,冷却单元被表示为CLR,离合器被表示为CLU,驱动件被表示为DRV,齿轮箱被表示为GBX,发电机被表示为GEN,加热单元被表示为HTR,主氧化剂压缩机单元被表示为MOC,其中,低压和高压变量被分别表示为LP MOC和HP MOC,以及蒸汽发生器单元被表示为STGN。虽然表格1示出机器106、178、180依次朝着压缩机部152或涡轮机部156,但是表格1也旨在覆盖机器106、178、180的相反次序。在表格1中,包含两个或更多个部件的任何单元旨在覆盖所述部件的并联布置。表格1并不旨在排除机器106、178、180的任何未示出的排列。机器106、178、180的这些部件可使能发送到燃气涡轮发动机150的氧化剂68的温度、压力和流率的反馈控制可行。如下面所进一步详细论述的,氧化剂68和燃料70可被供应给处于被具体选择以促进压缩排气170隔离和抽取而氧化剂68或燃料70未将排气170的质量降低的位置处的燃气涡轮机150。
如图3所示,EG供应系统78被设置在燃气涡轮发动机150与目标系统(例如,碳氢化合物生产系统12和其它系统84)之间。具体地,EG供应系统78(例如EG抽取系统(EGES)80)可被联接到在沿压缩机部152、燃烧器部154和/或涡轮机部156的一个或更多个抽取点76处的燃气涡轮发动机150。例如,抽取点76可被定位在毗邻的压缩机级之间,诸如在压缩机级之间的2、3、4、5、6、7、8、9或10个级间抽取点76。这些级间抽取点76中的每个提供被抽取排气42的不同温度和压力。类似地,抽取点76可被定位在毗邻的涡轮机级之间,诸如在涡轮机级之间的2、3、4、5、6、7、8、9或10个级间抽取点76。这些级间抽取点76中的每个提供被抽取排气42的不同温度和压力。通过进一步示例,抽取点76可被定位在整个燃烧器部154的多个位置,其可提供不同温度、压力、流率和气体组成。这些抽取点76中的每个可包含EG抽取导管、一个或更多个阀、传感器以及控制装置,其可被用于选择性控制被抽取排气42到EG供应系统78的流。
通过EG供应系统78分配的被抽取排气42具有适合于目标系统(例如,碳氢化合物生产系统12和其它系统84)的受控组分。例如,在这些抽取点76中的每个处,排气170可与氧化剂68和燃料70的喷射点(或流)基本隔离。换句话说,EG供应系统78可被具体设计成从燃气涡轮发动机150抽取排气170而没有任何添加的氧化剂68或燃料70。而且,鉴于在每个燃烧器160的化学计量燃烧,被抽取排气42可以是基本上不含氧和燃料。EG供应系统78可将被抽取排气42直接或间接传送到碳氢化合物生产系统12和/或其它系统84以用于各种处理,诸如提高原油采收率、固碳、存储或运输到非现场位置。不过,在某些实施例中,EG供应系统78包含在与目标系统一起使用之前,用于进一步处理排气42的EG处理系统(EGTS)82。例如,EG处理系统82可将排气42净化和/或分离为一种或更多种流95,例如富CO2贫N2流96,中间浓度CO2、N2流97,以及贫CO2富N2流98。这些处理后的排气流95可被单独使用,或与碳氢化合物生产系统12和其它系统84(例如,管道86、储罐88以及固碳系统90)的任何组合一起使用。
类似于在EG供应系统78中执行的排气处理,EG处理系统54可包含多个排气(EG)处理部件192,例如通过元件编号194、196、198、200、202、204、206、208和210所指示的。这些EG处理部件192(例如,194到210)可以以一个或更多个串联布置、并联布置或串联和平行布置的任何组合沿排气再循环路径110设置。例如,EG处理部件192(例如,194到210)可包含下列设备以任何次序的任何串联和/或平行布置,所述设备包括:一个或更多个热交换器(例如,热回收单元,诸如热回收蒸汽发生器、冷凝器、冷却器或加热器)、催化剂系统(例如,氧化催化剂系统)、微粒和/或水去除系统(例如,惯性分离器、聚结过滤器、不透水过滤器以及其它过滤器)、化学品喷射系统、溶剂型处理系统(例如,吸收剂、闪蒸罐等)、碳捕集系统、气体分离系统、气体净化系统和/或溶剂型处理系统,或它们的任何组合。在某些实施例中,催化剂系统可包含氧化催化剂、一氧化碳还原催化剂、氮氧化物还原催化剂、氧化铝、氧化锆、硅氧化物、钛氧化物、氧化铂、氧化钯、氧化钴或混合金属氧化物,或它们的组合。所公开实施例旨在包含在串联和并联布置中的前述部件192的任何和全部排列。如下面所述,表格2示出沿排气再循环路径110的部件192的布置的一些非限制性示例。
表2
如上面表格2所示,催化剂单元被表示为CU,氧化催化剂单元被表示为OCU,增压鼓风机被表示为BB,热交换器被表示为HX,热回收单元被表示为HRU,热回收蒸汽发生器被表示为HRSG,冷凝器被表示为COND,蒸汽涡轮机被表示为ST,微粒去除单元被表示为PRU,水分去除单元被表示为MRU,过滤器被表示为FIL,凝聚过滤器被表示为CFIL,不透水过滤器被表示为WFIL,惯性分离器被表示为INER,以及稀释剂供应系统(例如,蒸汽、氮或另一惰性气体)被表示为DIL。虽然表格2示出按顺序从涡轮机部156的排气出口182朝压缩机部152的排气入口184的部件192,但是表格2也旨在覆盖所示出部件192的相反顺序。在表格2中,包含两个或更多个部件的任何单元旨在覆盖带有所述部件、所述部件并联布置或它们的任何组合的集成单元。而且,在表格2的背景下,HRU、HRSG和COND为HE的示例;HRSG为HRU的示例;COND、WFIL和CFIL为WRU的示例;INER、FIL、WFIL和CFIL为PRU的示例;以及WFIL和CFIL为FIL的示例。再者,表格2并不旨在排除部件192的任何未示出的排列。在某些实施例中,所示出的部件192(例如,194到210)可以被部分或完全集成在HRSG 56、EGR系统58或它们的任何组合内。这些EG处理部件192可实现温度、压力、流率和气体成分的反馈控制,同时也从排气60去除水分和微粒。而且,被处理排气60可在一个或更多个抽取点76处被抽取以用于EG供应系统78和/或被再循环到压缩机部152的排气入口184。
在被处理时,再循环排气66经过压缩机部152,SEGR燃气涡轮机系统52可沿一个或更多个管道212(例如,放气导管或旁通导管)排出被压缩排气的一部分。每个管道212可将排气传送到一个或更多个热交换器214(例如,冷却单元)中,从而冷却再循环回到SEGR燃气涡轮机系统52中的排气。例如,在经过热交换器214后,被冷却排气的一部分可沿管道212被传送到涡轮机部156,以用于冷却和/或密封涡轮机套管、涡轮机外罩、轴承和其它部件。在此实施例中,SEGR燃气涡轮机系统52不传送任何氧化剂68(或其它潜在污染物)通过涡轮机部156以用于冷却和/或密封目的,并因此,被冷却排气的任何泄漏将不污染流过涡轮机部156的涡轮机级并驱动该涡轮机级的热燃烧产物(例如,工作排气)。通过进一步示例,在经过热交换器214之后,被冷却排气的一部分可沿管道216(例如,返回导管)被传送到压缩机部152的上游压缩机级,从而提高通过压缩机部152压缩的效率。在此实施例中,热交换器214可被配置为压缩机部152的级间冷却单元。以此方式,被冷却排气帮助增加SEGR燃气涡轮机系统52的运行效率,同时帮助保持排气的纯度(例如,基本不含氧化剂和燃料)。
图4为在图1至图3中示出的系统10的操作过程220的实施例的流程图。在某些实施例中,过程220可为计算机实施的过程,该过程存取存储在存储器122上的一个或更多个指令,并执行在图2中示出的控制器118的处理器120上的指令。例如,在过程220中的每个步骤可包含参照图2所述的控制系统100的控制器118可执行的指令。
过程220可通过初始化图1至图3的SEGR燃气涡轮机系统52的启动模式开始,如块222所指示的。例如,该启动模式可包括SEGR燃气涡轮机系统52的逐步倾斜上升,以保持在可接受阈值内的热梯度、振动和间隙(例如,在旋转与静止部件之间)。例如,在启动模式222期间,过程220可开始向燃烧器部154的燃烧器160和燃料喷嘴164供应压缩后的氧化剂68,如块224所指示的。在某些实施例中,压缩后的氧化剂可包含压缩空气、氧、富氧空气、氧减少的空气、氧氮混合物或它们的任何组合。例如,氧化剂68可被在图3中示出的氧化剂压缩系统186压缩。在启动模式222期间,过程220也可开始向燃烧器160和燃料喷嘴164供应燃料,如块226所指示的。在启动模式222期间,过程220也可开始向燃烧器160和燃料喷嘴164供应(可用时)排气,如块228所指示的。例如,燃料喷嘴164可产生一种或更多种扩散火焰、预混合火焰或扩散火焰与预混合火焰的组合。在启动模式222期间,通过燃气涡轮发动机156生成的排气60在数量和/或质量上可能是不足或不稳定的。因此,在启动模式期间,过程220可从一个或更多个存储单元(例如,储罐88)、管道86、其它SEGR燃气涡轮机系统52或其它排气源供应排气66。
接着,过程220可在燃烧器160中燃烧压缩后的氧化剂、燃料和排气的混合物以产生热燃烧气体172,如块230所指示的。具体地,过程220可通过图2的控制系统100进行控制,以促进在燃烧器部154的燃烧器160中的混合物的化学计量燃烧(例如,化学计量扩散燃烧、预混合燃烧或两者)。不过,在启动模式222期间,保持混合物的化学计量燃烧可能是特别困难的(并因此,热燃烧气体172中可能存在低水平的氧化剂和未燃烧燃料)。因此,在启动模式222中,热燃烧气体172可能比在稳定状态模式期间具有更大量的残留氧化剂68和/或燃料70,如在下面所进一步详细论述的。为此,过程220可在启动模式期间,执行一个或更多个控制指令以减少或消除在热燃烧气体172中的残留氧化剂68和/或燃料70。
接着,过程220用热燃烧气体172驱动涡轮机部156,如块232所指示的。例如,热燃烧气体172可驱动被设置在涡轮机部156内的一个或更多个涡轮机级174。在涡轮机部156的下游,过程220可处理来自最后涡轮机级174的排气60,如块234所指示的。例如,排气处理234可包含对任何残留氧化剂68和/或燃料70的过滤、催化反应、利用HRSG 56的化学处理、热回收等等。过程220也可将排气60的至少一些再循环回到SEGR燃气涡轮机系统52的压缩机部152,如块236所指示的。例如,排气再循环236可包括经过具有EG处理系统54的排气再循环路径110的通道,如图1至图3所示。
再循环排气66可继而在压缩机部152中被压缩,如块238所指示的。例如,SEGR燃气涡轮机系统52可在压缩机部152的一个或更多个压缩机级158中相继压缩再循环排气66。压缩后的排气170随后可被供应给燃烧器160和燃料喷嘴164,如块228所指示的。接着可重复步骤230、232、234、236和238,直到过程220最终转变到稳态模式,如块240所指示的。在转变240之后,过程220可继续执行步骤224到238,但是也可开始经由EG供应系统78抽取排气42,如块242所指示的。例如,排气42可从沿压缩机部152、燃烧器部154和涡轮机部156的一个或更多个抽取点76抽取,如图3所示。过程220可继而从EG供应系统78向碳氢化合物生产系统12供应被抽取排气42,如块244所指示的。碳氢化合物生产系统12接着可将排气42喷射到地球32中以用于提高原油采收率,如块246所指示的。例如,被抽取排气42可被如图1至图3所示的EOR系统18的排气喷射EOR系统112使用。
在某些实施例中,如图5中所示,提供传动系起动器系统600,其适于启动复杂传动系,如所示的排气再循环燃气涡轮机系统的传动系612。传动系612可包括例如燃气涡轮机部156、电功率发电机614和附加机械负载,如包括在组合循环应用中的压缩机部152,在组合循环应用中,燃气涡轮机排气流被引导至HRSG 56,且随后可用于为高压蒸汽涡轮机615和/或低压蒸汽涡轮机616提供动力。传动系612可包括进一步的机器,如,机器106、180,其(直接或间接)附接至例如(一个或更多个)轴176。在组合循环应用中,适于将传动系保持在全速燃气涡轮机156的功率输出比非组合循环应用中更高,非组合循环应用可导致更高的排气温度。这种温度可复杂化HRSG 56以及相关蒸汽涡轮机系统615、616的启动和操作。有利地,本文描述的技术提供可由控制系统100(如,控制器118)执行的控制技术,其可最小化或消除由于附加传动系机械负载的额外的热导致的对HRSG 56的不期望的影响,如下面更详细描述的。因为图5包括如上在图1-3中描述的类似部件,所以类似部件用类似标记表示。还应理解,虚线表示可用于传送和接收传感器和/或致动器信号的通信线路。因此,每个所示虚线可还表示设置在可通信地连接至控制系统100的设备或系统中的一个或更多个传感器和/或一个或更多个致动器。
传感器可包括电压传感器622、624,其适于测量高电压。例如,电压传感器622、624可包括电压互感器传感器,如,电容器式电压互感器(CVT)、电容耦合式电压互感器(CCVT)等,其适于逐步降低电压以便测量。传感器还可包括电流传感器626、628,其适于测量通过系统600的电流。电流传感器626和628可包括电流互感器,其可用于测量高电流。传感器可另外地或可替代地包括直接或间接用于得到燃烧当量比phi和/或燃烧产物的传感器。例如,可使用lambda仪表和/或氧传感器,其适于测量在燃气涡轮机52(如,燃料喷嘴164、燃烧部分168)中燃烧燃料70和氧化剂68之前、期间以及之后的氧气的比例。lambda传感器可确定例如实时氧化剂/燃料比(如,氧气燃料比或空燃比),其用于实时得到phi。传感器可另外地或可替代地包括光谱传感器(如,光学光谱学传感器、基于激光的传感器、波导光栅传感器)、色层分析传感器等,其用于确定燃料70、氧化剂68和/或燃烧产物(如,氮氧化物,未燃烧的烃,二氧化碳,碳产物,水等)的化学组成。传感器可另外地包括燃料传感器、流传感器、压力传感器、间隙传感器(如,旋转部件和固定部件之间的距离)、湿度传感器、和/或温度传感器。
致动器可包括断路器或开关630、632、634、636,其可用于引导电流,如图所示。致动器也可包括阀、线性运动致动器、非线性运动致动器、定位器、其他开关等,其适于控制各种所示部件。因此,燃料70和氧化剂68可通过燃料喷嘴164被供应(如上所示),且如上所述,氧化剂68可另外地由被例如如上所示的驱动件190驱动的压缩机188(如,增压空气压缩机(BAC))压缩并且经由燃烧器168被燃烧,从而提供功率和其他产物(如,气体),其可由EG供应系统78使用例如以进一步处理并提供至HC生产系统12用于碳氢化合物的生产。
在启动传动系612期间,负载换相逆变器(LCI)638(或静止变频器(SFC))可经由控制系统100控制以提供初始传动系加速度。因此,控制系统100可闭合LCI断路器630、632、可打开发电机断路器636、并闭合线路断路器634。则电功率可被提供至LCI 638,其可使用该发电机614作为同步电动机以提供适于转动传动系612的转动功率。在一个实施例中,可在启动操作期间使用LCI 638提供以小于标准电力网频率的频率驱动发电机的转动功率,如,0.5Hz和50Hz之间的频率。可使用的其他频率包括1Hz和10Hz之间和/或0.5Hz和59Hz之间。因此,控制系统100可控制LCI 638以经由发电机614启动传动系612。随着传动系612启动,控制系统100可调节阀639以提供至燃气涡轮机156中的燃料流。在期望的传动系转速(如,自持转速的10%-20%之间、自持转速的5%-40%之间、自持转速的12%-17%之间,其中,自持转速可在2500-4000RPM之间、1000-7000RPM之间、2750-3250RPM之间)处,然后可由控制系统100提供适于点火燃气涡轮机156的火花。因此,除了提供至LCI 638外,燃气涡轮机系统156还可开始提供转动功率至传动系612。如能够理解的,如某些点,燃气涡轮机系统156提供燃气涡轮机系统156可自持的充足功率,即,燃气涡轮机系统156可达到一转速,该转速通常可不要求经由LCI 638和/或发电机614提供的功率,如,标准操作转速(如,基本负载转速)。
在一个实施例中,随着传动系612增加转速至操作转速,LCI 638可被卸载(且最终经由断路器630、632断开),同时,燃气涡轮机156可被进一步加载(如,加快)至操作转速。在期望转速(如,操作转速)处,LCI 638可不再使用,且替代地,发电机断路器636可被闭合以将发电机614直接连接到电力网。的确,发电机614可经由燃气涡轮机156同步到电力网,例如,通过同步到接近50-60Hz的标准操作频率(北美)。由于在未使用LCI 638的情况下,电功率现在正被直接传送到发电机614,这可提供足够的功率,使得燃气涡轮机156可被卸载至期望负载,使得HRSG 56和蒸汽涡轮机615、616可被更优化地启动。在其他管辖区,可使用其他电力网频率。
为了以电力网频率使用发电机614作为电动马达,控制系统100可提供某些设备调节,如对发电机保护板系统(GPP)640和励磁系统642的调节。例如,GPP 640可希望感测当发电机被用于将机械运动转换为电功率时存在的条件,而不是当发电机正使用由电力网644经由电力网加强(GSU)变压器646供应的电功率时存在的条件。同样,励磁器642通常被配置为提供用在电力生成中的磁场,例如,在机械运动向电功率转化期间,通过提供功率至某些线圈。因此,控制系统100可将GPP 640和励磁器642配置提供在发电机614作为电动马达的应用期间在被同步至电力网频率的电力网644时的适当使用。例如,GPP 640可期望一个方向(如,朝向电力网644)上的电流,同时,在发电机作为马达的应用期间,可逆转电流方向(如,流至发电机)。同样,由励磁器642提供的功率可改为更有益于在当发电机614代替电动马达被利用时的情况期间。
当发电机614与电力网频率的电力网644同步并被用作电动马达时,发电机614可提供足够的转动功率至传动系612,使得燃气涡轮机156然后可被卸载。例如,燃气涡轮机156可被卸载至来自燃气涡轮机156的排气温度与HRSG 56和蒸汽系统615、,616更相配的设定点或范围。即,不是利用作为传动系612的主要驱动器的燃气涡轮机156来以全传动系操作转速操作,而是发电机614可替代地用作主要驱动器。一旦HRSG 56和蒸汽涡轮机615、616在线(on-line),燃气涡轮机的输出可根据标准组合的循环加载过程增加。一旦发电机的输出从负过渡到正(如,从用作电动马达到用作电功率发电机),励磁器642和GPP 640控制可被恢复用于正常功率生成操作期间使用,且系统10的加载然后可根据正常组合的循环加载过程继续。通过在组合的循环系统启动期间将发电机614用作电动马达,本文所描述的技术可能够降低燃气涡轮机156的排气温度,从而提供HRSG 56和相关蒸汽涡轮机系统615、616的较小应力的启动,从而改善系统56、615和616的可操作寿命。因此,可包括系统100、614、638、640、642和/或646,传感器622、624、626、628,断路器630、632、634、636的传动系起动器系统600可提供可用于启动传动系612的新颖的技术。
图6示出过程700的实施例,其可例如由控制系统100使用以启动传动系612并使HRSG 56和蒸汽涡轮机615、616在线。过程700可实施为存储在存储器122中并且可由控制器118的处理器120执行的可执行代码或计算机指令。在所示实施例中,过程700可通过使用LCI 638和燃气涡轮机部156启动传动系612,并将传动系612加速至操作转速(框702)。过程700然后可卸载LCI 638并加载燃气涡轮机156,同时维持操作转速(框704)。即,一旦达到操作转速,LCI 638可被卸载,同时适于维持操作转速的机械功率的越来越高的部分由燃气涡轮机156提供,直到基本上所有机械功率由燃气涡轮机156提供(框704)。
为了改善HRSG 56和蒸汽涡轮机615、616的启动,发电机614可用作电动马达,其直接同步至电力网644并用来提供适于移动传动系的机械功率,并伴随比当燃气涡轮机156提供用于移动传动系612的基本上所有机械功率时存在的涡轮机废热更少的涡轮机废热。因此,过程700可使发电机614与相同电力网频率(如,北美为50-60Hz)的电力网644同步并闭合发电机断路器636(框706)。过程700然后可调节GPP 640和励磁系统642控制以及保护逻辑(框708)以能够将发电机614操作为全电力网频率的马达。
过程700然后可卸载燃气涡轮机156并加载发电机614作为全电力网频率的马达(框710),直到燃气涡轮机156的排气温度更适于HRSG 56和蒸汽涡轮机615、616。过程700然后可确定(决定712)HP蒸汽涡轮机615和/或LP蒸汽涡轮机616是否在线。如果涡轮机615、616不在线,则过程700可迭代(iterate)回到决定712。如果涡轮机615、616在线,则过程700可鉴于蒸汽涡轮机615和/或616应力加载燃气涡轮机156、卸载发电机614(框714)。过程700然后可确定(决定716)发电机614负载是否为负。如果发电机负载为负(决定716),则发电机614正在提供电功率而不是机械功率。因此,过程700然后可将GPP 640和励磁器642控制逻辑和保护逻辑恢复至正常电功率生成操作(框718)。过程700然后可针对设施(plant)(如,系统10)以正常启动顺序继续(框720)。
技术效果包括以电力网频率转速使用发电机614以在传动系612启动期间降低燃气涡轮机156的贡献。因此,可使HRSG 56和相关的涡轮机系统615、616在线并伴随相比原本如果在传动系612的整个启动顺序期间燃气涡轮机156已经被用作主要的传动系启动器时的压力将产生的应力更小的应力(如,热应力)。
本书面描述使用示例来公开本发明,包含最佳模式,并且也使得本领域技术人员能够实践本发明,包含制作和使用任何装置或系统并执行任何结合的方法。本发明的可取得专利的范围由权利要求限定,并且可包含本领域技术人员可以想到的其它示例。如果其它示例具有并无不同于本权利要求文字语言的结构要素,或如果它们包括与权利要求文字语言非实质不同的等同结构要素,则这样的示例旨在权利要求的范围内。
Claims (23)
1.一种用于启动燃气涡轮机系统的传动系的系统,包括:
传动系起动器系统,其包括:
发电机,其机械耦合至所述燃气涡轮机系统的所述传动系;
励磁系统,其电耦合至所述发电机并被配置为提供磁场;
负载换相逆变器即LCI,其电耦合至所述发电机并被配置为提供电功率至所述发电机;和
控制器,其可通信地耦合至所述发电机、所述励磁系统和所述LCI,其中,所述控制器被配置为执行以下步骤:
a)经由所述LCI和所述发电机启动所述传动系达小于传动系自持转速,其中,所述发电机将电转换为机械运动,其中,所述LCI从电力网接收电力网电功率以驱动所述传动系,并且所述LCI被配置为以小于所述电力网的标准电力网频率的频率递送电流至所述发电机;
b)经由燃气涡轮机驱动所述传动系达所述传动系自持转速;
c)通过使所述发电机在所述标准电力网频率与所述电力网同步经由所述发电机以所述传动系自持转速驱动所述传动系;以及
d)当所述发电机以所述传动系自持转速驱动所述传动系时,卸载所述燃气涡轮机以将燃气涡轮机排气的操作排气温度降低至期望的排气温度。
2.根据权利要求1所述的用于启动燃气涡轮机系统的传动系的系统,其中,所述标准电力网频率包括50-60Hz之间。
3.根据权利要求1所述的用于启动燃气涡轮机系统的传动系的系统,其中,所述期望的排气温度包括适于启动热回收蒸汽发生系统即HRSG系统并伴随与以所述操作排气温度启动所述HRSG系统相比较减小的应力的温度。
4.根据权利要求3所述的用于启动燃气涡轮机系统的传动系的系统,其中,所述HRSG系统被流体地耦合至高压蒸汽涡轮机、低压蒸汽涡轮机或其组合。
5.根据权利要求1所述的用于启动燃气涡轮机系统的传动系的系统,包括压缩机,所述压缩机经由所述传动系机械地耦合至所述燃气涡轮机,其中,HRSG系统被流体地耦合至所述压缩机以再循环离开所述燃气涡轮机的所述燃气涡轮机排气。
6.根据权利要求1所述的用于启动燃气涡轮机系统的传动系的系统,包括发电机保护板系统即GPP,其可通信地连接至所述发电机并被配置为保护所述发电机免于不期望的条件,其中,所述控制器被配置为改变所述GPP的控制逻辑以当所述发电机正将电转换为机械运动时,使所述发电机能够在标准电力网频率下操作。
7.根据权利要求1所述的用于启动燃气涡轮机系统的传动系的系统,其中,所述控制器被配置为改变所述励磁系统的控制逻辑以当所述发电机正将电转换为机械运动时,使所述发电机能够在所述标准电力网频率下操作。
8.根据权利要求1所述的用于启动燃气涡轮机系统的传动系的系统,其中,所述控制器被配置为使所述燃气涡轮机的燃烧的当量比能够在0.95至1.05之间。
9.一种用于启动排气再循环燃气涡轮机系统的传动系的方法,包括:
经由负载换相逆变器即LCI启动所述传动系,所述LCI电耦合至发电机并被配置为提供电功率至所述发电机,使得所述发电机将所述电功率转换为机械功率,其中,所述LCI被配置为从电力网接收功率以驱动所述传动系;
一旦所述发电机已经达到第一传动系转速,则点火燃气涡轮机以启动所述燃气涡轮机;
加载所述燃气涡轮机到第一负载以达到第二传动系转速;
卸载所述LCI,并且当达到所述第二传动系转速时,断开所述LCI;
使所述发电机在标准电力网频率与电力网同步;并且
经由所述发电机以所述第二传动系转速驱动所述传动系。
10.根据权利要求9所述的方法,其中,所述标准电力网频率包括50-60Hz之间,并且其中,所述LCI被配置为以小于所述标准电力网频率的频率递送电流至所述发电机。
11.根据权利要求9所述的方法,包括在同步所述发电机之后将所述燃气涡轮机卸载到小于所述第一负载的期望负载,其中,将所述燃气涡轮机卸载到所述期望负载提供的排气温度与当所述燃气涡轮机被加载到所述第一负载时产生的操作排气温度相比是降低的。
12.根据权利要求11所述的方法,包括当所述燃气涡轮机被加载到所述期望负载时,通过将排气从所述燃气涡轮机递送至HRSG系统来启动所述HRSG系统。
13.根据权利要求12所述的方法,包括由所述HRSG系统提供的所述排气启动高压蒸汽涡轮机、低压蒸汽涡轮机或其组合。
14.根据权利要求13所述的方法,包括确定高压蒸汽涡轮机、低压蒸汽涡轮机或其组合是否在线,且如果在线,则加载所述燃气涡轮机至所述第一负载。
15.根据权利要求13所述的方法,其中,在将所述燃气涡轮机卸载到所述期望负载之后加载所述燃气涡轮机至所述第一负载包括遵从所述HRSG、所述高压蒸汽涡轮机、所述低压蒸汽涡轮机或其组合的热限制。
16.根据权利要求9所述的方法,其中,所述燃气涡轮机包括化学计量排气再循环燃气涡轮发动机即SEGR燃气涡轮发动机,其被配置为将二氧化碳供应至提高原油采收率系统即EOR系统。
17.一种用于启动排气再循环燃气涡轮机系统的传动系的控制系统,包括:
处理器,其被配置为:
经由负载换相逆变器即LCI启动所述排气再循环燃气涡轮机系统的所述传动系,所述LCI电耦合至发电机并被配置为提供电功率至所述发电机,使得所述发电机将所述电功率转换为机械功率,其中,所述LCI被配置为从电力网接收功率以驱动所述传动系;
一旦所述发电机已经达到第一传动系转速,则点火燃气涡轮机以启动所述燃气涡轮机;
加载所述燃气涡轮机至第一负载以达到第二传动系转速;
卸载所述LCI,并且当达到所述第二传动系转速时,断开所述LCI;
使所述发电机在标准电力网频率与电力网同步;以及
经由所述发电机以所述第二传动系转速驱动所述传动系。
18.根据权利要求17所述的控制系统,其中,所述处理器被配置为在同步所述发电机之后将所述燃气涡轮机卸载到小于所述第一负载的期望负载,其中,将所述燃气涡轮机卸载到所述期望负载提供的排气温度与当所述燃气涡轮机被加载到第二负载时产生的操作排气温度相比是降低的,并且其中,所述LCI被配置为以小于所述标准电力网频率的频率递送电流至所述发电机。
19.根据权利要求18所述的控制系统,其中,所述处理器被配置为当所述燃气涡轮机被加载到所述期望负载时,通过将排气从所述燃气涡轮机递送至HRSG系统来启动所述HRSG系统。
20.根据权利要求19所述的控制系统,其中,所述处理器被配置为由所述HRSG系统提供的所述排气启动高压蒸汽涡轮机、低压蒸汽涡轮机或其组合。
21.根据权利要求17所述的控制系统,其中,所述处理器被配置为确定高压蒸汽涡轮机、低压蒸汽涡轮机或其组合是否在线,且如果在线,则加载所述燃气涡轮机至所述第一负载。
22.根据权利要求17所述的控制系统,包括发电机保护板系统即GPP,其可通信地连接至所述发电机并被配置为保护所述发电机免于不期望的条件,其中,所述控制器被配置为改变所述GPP的控制逻辑以当所述发电机将所述电功率转换为机械功率时,使所述发电机能够在所述标准电力网频率下操作。
23.根据权利要求17所述的控制系统,其中,所述燃气涡轮机包括化学计量排气再循环燃气涡轮发动机即SEGR燃气涡轮发动机,且其中,所述控制器被配置为使所述燃气涡轮机的燃烧的当量比能够在0.95至1.05之间。
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US201462019019P | 2014-06-30 | 2014-06-30 | |
US62/019,019 | 2014-06-30 | ||
US14/741,189 US10655542B2 (en) | 2014-06-30 | 2015-06-16 | Method and system for startup of gas turbine system drive trains with exhaust gas recirculation |
US14/741,189 | 2015-06-16 | ||
PCT/US2015/038373 WO2016003935A1 (en) | 2014-06-30 | 2015-06-29 | Method and system for startup of gas turbine system drive trains with exhaust gas recirculation |
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US20150377140A1 (en) | 2015-12-31 |
JP6615133B2 (ja) | 2019-12-04 |
US10655542B2 (en) | 2020-05-19 |
EP3161293A1 (en) | 2017-05-03 |
JP2017531117A (ja) | 2017-10-19 |
CN107076023A (zh) | 2017-08-18 |
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