JP5645780B2 - Gas turbine fuel system and cleaning method thereof - Google Patents
Gas turbine fuel system and cleaning method thereof Download PDFInfo
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- JP5645780B2 JP5645780B2 JP2011198962A JP2011198962A JP5645780B2 JP 5645780 B2 JP5645780 B2 JP 5645780B2 JP 2011198962 A JP2011198962 A JP 2011198962A JP 2011198962 A JP2011198962 A JP 2011198962A JP 5645780 B2 JP5645780 B2 JP 5645780B2
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Description
本発明は、複数の燃焼器に燃料を配分して供給するフローデバイダを備えたガスタービン燃料系統及びその洗浄方法に関する。 The present invention relates to a gas turbine fuel system including a flow divider that distributes and supplies fuel to a plurality of combustors, and a cleaning method thereof.
多缶式燃焼器を備えるガスタービンの燃料系統では、その各々の燃焼器に燃料を均等に分配するフローデバイダが設けられる。ガスタービン燃料系統に備わるフローデバイダは、重油等の高粘度の燃料を使用していると、ガスタービン停止中にフローデバイダに残った燃料が固着し、ガスタービン起動時に動作不良を起こして起動できなくなる可能性があった。 In a fuel system of a gas turbine including a multi-can combustor, a flow divider that distributes fuel evenly to each combustor is provided. When a high-viscosity fuel such as heavy oil is used for the flow divider provided in the gas turbine fuel system, the fuel remaining in the flow divider is fixed while the gas turbine is stopped, causing malfunctions when starting the gas turbine. There was a possibility of disappearing.
なお、フローデバイダを備えたガスタービン燃料系統の従来技術としては、例えば特開昭６０−２４９６２６号公報に記載のものがある。 As a prior art of a gas turbine fuel system equipped with a flow divider, for example, there is one described in Japanese Patent Application Laid-Open No. 60-249626.
本発明は上述した課題に鑑みなされたものであって、フローデバイダに燃料が固着することによる動作不良を抑制したガスタービン燃料系統及びその洗浄方法を提供することを目的とする。 The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a gas turbine fuel system and a cleaning method thereof in which operation failure due to fuel adhering to a flow divider is suppressed.
上述の目的を達成するために、本発明では、フローデバイダを備えたガスタービン燃料系統において、前記フローデバイダに洗浄用燃料を供給する洗浄用燃料系統を備えたことを特徴とする。 In order to achieve the above object, the present invention is characterized in that a gas turbine fuel system including a flow divider includes a cleaning fuel system for supplying cleaning fuel to the flow divider.
また、フローデバイダを備えたガスタービン燃料系統の洗浄方法において、ガスタービンの停止中、前記フローデバイダに洗浄用燃料を供給することを特徴とする。 In the method for cleaning a gas turbine fuel system provided with a flow divider, a cleaning fuel is supplied to the flow divider while the gas turbine is stopped.
本発明によれば、フローデバイダに燃料が固着することによる動作不良を抑制したガスタービン燃料系統及びその洗浄方法を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the gas turbine fuel system which suppressed the malfunctioning by the fuel adhering to a flow divider, and its washing | cleaning method can be provided.
以下、本発明の実施形態について図面を用いて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
図１はガスタービン燃料系統に組み込んだ本発明の第１実施形態を示す概略系統図である。 FIG. 1 is a schematic system diagram showing a first embodiment of the present invention incorporated in a gas turbine fuel system.
通常、多缶式燃焼器をもつガスタービン燃料系統では、重油等の液体燃料を運転用燃料系統１０の燃料供給ポンプ１からフローデバイダ２に供給し、このフローデバイダ２により、図示しないガスタービンの各々の燃焼器へ均等に燃料を分配している。 Usually, in a gas turbine fuel system having a multi-can combustor, liquid fuel such as heavy oil is supplied from the fuel supply pump 1 of the operating fuel system 10 to the flow divider 2, and the flow divider 2 is used to supply a gas turbine (not shown). Fuel is distributed evenly to each combustor.
本実施形態に係るガスタービン燃料系統は、上記構成に加えて、ケロシン等の洗浄用燃料を保有するフローデバイダ洗浄タンク３、フローデバイダ洗浄タンク３で洗浄された燃料を昇圧するフローデバイダ洗浄ポンプ４、フローデバイダ洗浄ポンプ４の出口側に設置されるポンプ出口逆止弁５、燃料供給ポンプ１からの供給燃料とフローデバイダ洗浄ポンプ４からの洗浄用燃料とを切替えてフローデバイダ２に供給する三方切替弁６、フローデバイダ２の出口から燃料をフローデバイダ洗浄タンク３に戻すトランスファーバルブ７を備えている。このトランスファーバルブ７からフローデバイダ洗浄ポンプ４を介して三方切替弁６に至る系統を洗浄用燃料系統２０と称する。 In addition to the above configuration, the gas turbine fuel system according to the present embodiment includes a flow divider cleaning tank 3 that holds cleaning fuel such as kerosene, and a flow divider cleaning pump 4 that boosts the fuel cleaned in the flow divider cleaning tank 3. , A pump outlet check valve 5 installed on the outlet side of the flow divider cleaning pump 4, and a three-way supply to the flow divider 2 by switching the fuel supplied from the fuel supply pump 1 and the fuel for cleaning from the flow divider cleaning pump 4. A switching valve 6 and a transfer valve 7 for returning fuel to the flow divider cleaning tank 3 from the outlet of the flow divider 2 are provided. A system from the transfer valve 7 to the three-way switching valve 6 through the flow divider cleaning pump 4 is referred to as a cleaning fuel system 20.
上述したガスタービン燃料系統において、フローデバイダ２を洗浄する場合の運転方法について説明する。先ず、ガスタービン燃料系統の洗浄はガスタービンの停止中に実施する。洗浄時、洗浄用燃料系統２０のフローデバイダ洗浄ポンプ４を起動し、三方切替弁６で切替られた洗浄用燃料をフローデバイダ２に供給する。また、フローデバイダ２を洗浄した後の洗浄用燃料は、トランスファーバルブ７によりフローデバイダ洗浄タンク３へ戻す。このように、フローデバイダ洗浄タンク３に貯蔵した洗浄用燃料をフローデバイダ２に供給し、洗浄後の洗浄用燃料を再びフローデバイダ洗浄タンク３に戻す閉ループを形成することにより、フローデバイダ２の洗浄を行う。フローデバイダ２にはケロシン等の低粘度の燃料が供給され、この洗浄用燃料によって、フローデバイダ内に残留して固着した重油等の高粘度の燃料を洗浄する。 An operation method for cleaning the flow divider 2 in the gas turbine fuel system described above will be described. First, cleaning of the gas turbine fuel system is performed while the gas turbine is stopped. At the time of cleaning, the flow divider cleaning pump 4 of the cleaning fuel system 20 is activated, and the cleaning fuel switched by the three-way switching valve 6 is supplied to the flow divider 2. The cleaning fuel after cleaning the flow divider 2 is returned to the flow divider cleaning tank 3 by the transfer valve 7. In this way, the cleaning fuel stored in the flow divider cleaning tank 3 is supplied to the flow divider 2, and the cleaning of the flow divider 2 is formed by forming a closed loop that returns the cleaned cleaning fuel to the flow divider cleaning tank 3 again. I do. The flow divider 2 is supplied with low-viscosity fuel such as kerosene, and the cleaning fuel cleans high-viscosity fuel such as heavy oil remaining and fixed in the flow divider.
なお、ポンプ出口逆止弁５は、三方切替弁６が故障した場合、ガスタービンの通常運転時に燃料供給ポンプ１から供給された燃料をフローデバイダ洗浄ポンプ４に逆流させないために備えている。 The pump outlet check valve 5 is provided to prevent the fuel supplied from the fuel supply pump 1 from flowing back to the flow divider cleaning pump 4 during normal operation of the gas turbine when the three-way switching valve 6 fails.
上述した本実施形態によれば、ガスタービン停止中にケロシン等の低粘度の燃料でフローデバイダを洗浄することにより、燃料の固着等を原因としたガスタービン起動時の動作不良を防止することが可能となる。また、計画外のフローデバイダの分解点検リスクを抑えることができる。 According to the present embodiment described above, it is possible to prevent malfunction at the time of starting the gas turbine due to fuel sticking or the like by washing the flow divider with a low-viscosity fuel such as kerosene while the gas turbine is stopped. It becomes possible. In addition, the risk of overhauling unplanned flow dividers can be reduced.
図２はガスタービン燃料系統に組み込んだ本発明の第２実施形態を示す概略系統図である。なお、図１と同一の構成には同一符号を付す。 FIG. 2 is a schematic system diagram showing a second embodiment of the present invention incorporated in a gas turbine fuel system. In addition, the same code | symbol is attached | subjected to the structure same as FIG.
本実施形態に係るガスタービン燃料系統は、図１の系統構成に対して、トランスファーバルブ７からフローデバイダ洗浄タンク３への洗浄用燃料の戻り系統に設けた三方切替弁８と、この三方切替弁８で切替えられた燃料を洗浄用燃料系統２０からパージするパージ系統３０と、パージした燃料を貯蔵するサンプタンク９とを備えている点で相違する。 The gas turbine fuel system according to the present embodiment is different from the system configuration of FIG. 1 in that the three-way switching valve 8 provided in the return system of the cleaning fuel from the transfer valve 7 to the flow divider cleaning tank 3 and the three-way switching valve 8 is different in that it includes a purge system 30 for purging the fuel switched at 8 from the cleaning fuel system 20 and a sump tank 9 for storing the purged fuel.
図２のガスタービン燃料系統におけるフローデバイダの洗浄方法は、基本的に図１と同様である。フローデバイダ洗浄タンク３に貯蔵した洗浄用燃料をフローデバイダ２に供給し、洗浄後の洗浄用燃料を再びフローデバイダ洗浄タンク３に戻す閉ループを形成することにより、ガスタービンの停止中にフローデバイダ２の洗浄を行う。本実施例では、上述した洗浄運転を実施した後であって、ガスタービンの運転前に、ガスタービン燃料系統内（主にフローデバイダ内）に残留したケロシン等の洗浄用燃料をパージして、運転用燃料（重油等）に置換する運転を行うようにした点が特徴である。 The flow divider cleaning method in the gas turbine fuel system of FIG. 2 is basically the same as that of FIG. By supplying a cleaning fuel stored in the flow divider cleaning tank 3 to the flow divider 2 and forming a closed loop for returning the cleaned cleaning fuel to the flow divider cleaning tank 3 again, the flow divider 2 is stopped while the gas turbine is stopped. Perform cleaning. In this embodiment, after the cleaning operation described above is performed and before the operation of the gas turbine, the cleaning fuel such as kerosene remaining in the gas turbine fuel system (mainly in the flow divider) is purged, It is characterized in that an operation for replacing with a driving fuel (heavy oil or the like) is performed.
具体的には、ガスタービン運転前、トランスファーバルブ７出口の三方切替弁８を洗浄用燃料系統２０からパージ系統３０に切替えると共に、燃料供給ポンプ１（フローデバイダ洗浄ポンプ４）出口の三方切替弁６を洗浄用燃料系統２０から運転用燃料系統１０に切替える。そして、燃料供給ポンプ１を起動し、運転用燃料のフローデバイダ２への供給を開始する。この運転用燃料の供給開始により、運転用燃料系統１０の三方切替弁６以降の機器及び配管内に残留するケロシン等の洗浄用燃料が下流側に押し流され、トランスファーバルブ７及び三方切替弁８を経由してパージ系統３０に排出される。この洗浄用燃料のパージ運転を所定時間実施した上で、ガスタービンの運転（燃焼器への燃料の供給）を開始する。 Specifically, before the gas turbine operation, the three-way switching valve 8 at the outlet of the transfer valve 7 is switched from the cleaning fuel system 20 to the purge system 30 and the three-way switching valve 6 at the outlet of the fuel supply pump 1 (flow divider cleaning pump 4). Is switched from the cleaning fuel system 20 to the operating fuel system 10. Then, the fuel supply pump 1 is activated and supply of the operating fuel to the flow divider 2 is started. By starting the supply of the operating fuel, the cleaning fuel such as kerosene remaining in the equipment and piping after the three-way switching valve 6 of the driving fuel system 10 is pushed downstream, and the transfer valve 7 and the three-way switching valve 8 are moved. And then discharged to the purge system 30. The purge operation of the cleaning fuel is performed for a predetermined time, and then the operation of the gas turbine (supply of fuel to the combustor) is started.
上述した本実施形態によれば、図１の実施形態による効果に加えて、運転用燃料系統１０やフローデバイダ２内に残った洗浄用燃料を運転用燃料（重油等）に置換することが可能となる。 According to the above-described embodiment, in addition to the effects of the embodiment of FIG. 1, the cleaning fuel remaining in the operating fuel system 10 and the flow divider 2 can be replaced with the operating fuel (heavy oil or the like). It becomes.
１ 燃料供給ポンプ
２ フローデバイダ
３ フローデバイダ洗浄タンク
４ フローデバイダ洗浄ポンプ
５ ポンプ出口逆止弁
６、８ 三方切替弁
７ トランスファーバルブ
９ サンプタンク
１０ 運転用燃料系統
２０ 洗浄用燃料系統
３０ パージ系統
DESCRIPTION OF SYMBOLS 1 Fuel supply pump 2 Flow divider 3 Flow divider washing tank 4 Flow divider washing pump 5 Pump outlet check valve 6, 8 Three-way switching valve 7 Transfer valve 9 Sump tank 10 Fuel system for operation 20 Fuel system for cleaning 30 Purge system
Claims (8)
前記フローデバイダに洗浄用燃料を供給する洗浄用燃料系統を備えたことを特徴とするガスタービン燃料系統。 In a gas turbine fuel system with a flow divider,
A gas turbine fuel system comprising a cleaning fuel system for supplying cleaning fuel to the flow divider.
前記フローデバイダ出口と前記燃料供給ポンプ出口を接続する洗浄用燃料系統と、前記運転用燃料系統と前記洗浄用燃料系統を切替える三方切替弁と、前記運転用燃料より低粘度の洗浄用燃料を貯蔵するフローデバイダ洗浄タンクと、前記洗浄用燃料を前記フローデバイダに供給するフローデバイダ洗浄ポンプとを備えたことを特徴とするガスタービン燃料系統。 In a gas turbine fuel system comprising a flow divider that distributes operating fuel to a plurality of combustors, and an operating fuel system that includes a fuel supply pump that supplies operating fuel to the flow divider,
A cleaning fuel system connecting the flow divider outlet and the fuel supply pump outlet, a three-way switching valve for switching between the operating fuel system and the cleaning fuel system, and storing cleaning fuel having a viscosity lower than that of the operating fuel A gas turbine fuel system comprising: a flow divider cleaning tank that performs a flow divider cleaning pump that supplies the cleaning fuel to the flow divider.
前記洗浄用燃料を前記洗浄用燃料系統の外に排出するパージ系統を備えたことを特徴とするガスタービン燃料系統。 The gas turbine fuel system according to claim 1 or 2,
A gas turbine fuel system comprising a purge system for discharging the cleaning fuel out of the cleaning fuel system.
前記洗浄用燃料としてケロシンを用いることを特徴とするガスタービン燃料系統。 The gas turbine fuel system according to claim 1 or 2,
A gas turbine fuel system using kerosene as the cleaning fuel.
前記フローデバイダ洗浄ポンプと前記三方切替弁の間に逆止弁を設けたことを特徴とするガスタービン燃料系統。 The gas turbine fuel system according to claim 2,
A gas turbine fuel system, wherein a check valve is provided between the flow divider cleaning pump and the three-way switching valve.
前記洗浄用燃料系統と前記パージ系統を切替えるパージ用三方切替弁を設けたことを特徴とするガスタービン燃料系統。 The gas turbine fuel system according to claim 3,
A gas turbine fuel system comprising a purge three-way switching valve for switching between the cleaning fuel system and the purge system.
ガスタービンの停止中、前記フローデバイダに洗浄用燃料を供給することを特徴とするガスタービン燃料系統の洗浄方法。 In a method for cleaning a gas turbine fuel system equipped with a flow divider,
A cleaning method for a gas turbine fuel system, wherein cleaning gas is supplied to the flow divider while the gas turbine is stopped.
前記フローデバイダの洗浄運転を終了した後、前記フローデバイダへの運転用燃料の供給を開始し、前記フローデバイダ内に残留する洗浄用燃料を含む運転用燃料を系統外にパージすることを特徴とするガスタービン燃料系統の洗浄方法。 The gas turbine fuel system cleaning method according to claim 7,
After finishing the flow divider cleaning operation, supply of the operating fuel to the flow divider is started, and the operating fuel including the cleaning fuel remaining in the flow divider is purged outside the system. A method for cleaning a gas turbine fuel system.
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| JP2011198962A JP5645780B2 (en) | 2011-09-13 | 2011-09-13 | Gas turbine fuel system and cleaning method thereof |
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| JP2011198962A JP5645780B2 (en) | 2011-09-13 | 2011-09-13 | Gas turbine fuel system and cleaning method thereof |
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| JP5864463B2 (en) * | 2013-03-22 | 2016-02-17 | 株式会社ユニバーサルエンターテインメント | Game machine |
| US10184351B2 (en) | 2013-12-09 | 2019-01-22 | Siemens Aktiengesellschaft | Gas turbine with a bypass line for improved fuel line flushing, and method for flushing a gas turbine |
| EP3101238A1 (en) * | 2015-06-05 | 2016-12-07 | Siemens Aktiengesellschaft | Fuel line system with flow splitter and by-pass line |
| DE102017218425A1 (en) * | 2017-10-16 | 2019-04-18 | Lufthansa Technik Ag | Device for cleaning turbine blades of a jet engine |
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| JPH0683930U (en) * | 1993-05-10 | 1994-12-02 | 石川島播磨重工業株式会社 | Residual fuel purging device for fuel injection valve |
| US6145294A (en) * | 1998-04-09 | 2000-11-14 | General Electric Co. | Liquid fuel and water injection purge system for a gas turbine |
| JPH11324722A (en) * | 1998-05-12 | 1999-11-26 | Mitsubishi Heavy Ind Ltd | System for cleaning gas turbine fuel nozzle |
| WO2009149990A1 (en) * | 2008-06-09 | 2009-12-17 | Siemens Aktiengesellschaft | Method for rinsing a fuel system of a gas turbine and associated fuel system |
| EP2216529A1 (en) * | 2009-02-06 | 2010-08-11 | Siemens Aktiengesellschaft | Method for purging a section of a fuel system of a gas turbine |
| US20110100015A1 (en) * | 2009-11-05 | 2011-05-05 | General Electric Company | Gas turbine system to inhibit coke formation and methods of use |
| US20130186057A1 (en) * | 2012-01-25 | 2013-07-25 | Venkadesh Shanmugam | Naphtha and process gas/syngas mixture firing method for gas turbine engines |
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