JP5183304B2 - Test method and power generation equipment for turbine for driving feedwater pump - Google Patents

Test method and power generation equipment for turbine for driving feedwater pump Download PDF

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JP5183304B2
JP5183304B2 JP2008146628A JP2008146628A JP5183304B2 JP 5183304 B2 JP5183304 B2 JP 5183304B2 JP 2008146628 A JP2008146628 A JP 2008146628A JP 2008146628 A JP2008146628 A JP 2008146628A JP 5183304 B2 JP5183304 B2 JP 5183304B2
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尚行 松山
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Chugoku Electric Power Co Inc
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この発明は、ボイラに給水するポンプ（以下、「ボイラ給水ポンプ」という）を駆動するための蒸気タービン（以下、「給水ポンプ駆動用タービン」という）を回転させて試験を行う給水ポンプ駆動用タービンに関する試験方法および給水ポンプ駆動用タービンを備えた発電設備に関する。   The present invention relates to a feed water pump driving turbine for performing a test by rotating a steam turbine (hereinafter referred to as a “feed water pump driving turbine”) for driving a pump for supplying water to a boiler (hereinafter referred to as “boiler feed water pump”). And a power generation facility equipped with a turbine for driving a feed water pump.

石炭火力発電所などにおいては、例えば、次のようにして給水ポンプ駆動用タービンを回して、ボイラ給水ポンプを駆動している（例えば、特許文献１参照。）。すなわち、図２に示すように、ボイラ１００で発生した蒸気を高圧タービン１０１や中圧タービン１０２に供給し、高圧タービン１０１を通過した蒸気の一部（図中矢印Ｆ１１）を駆動蒸気として給水ポンプ駆動用タービン１０３に供給する。これにより、給水ポンプ駆動用タービン１０３を回し、給水ポンプ駆動用タービン１０３に連結されているボイラ給水ポンプ１０４を駆動して、復水器１０５からの復水をボイラ１００に供給するものである。
特開２００２−１１５８０７号公報 In a coal-fired power plant or the like, for example, a boiler feedwater pump is driven by rotating a feedwater pump driving turbine as follows (see, for example, Patent Document 1). That is, as shown in FIG. 2, the steam generated in the boiler 100 is supplied to the high-pressure turbine 101 and the intermediate-pressure turbine 102, and a part of the steam (arrow F11 in the figure) that has passed through the high-pressure turbine 101 is used as the driving steam. Supplied to the driving turbine 103. Thus, the feed water pump driving turbine 103 is rotated to drive the boiler feed water pump 104 connected to the feed water pump driving turbine 103 to supply the condensate from the condenser 105 to the boiler 100.
JP 2002-115807 A

ところで、定期的に行う事業者検査などにおいて、給水ポンプ駆動用タービン１０３を回して過速度試験などの試験を行う場合がある。この場合、高圧タービン１０１から給水ポンプ駆動用タービン１０３への蒸気の流れを遮断し、ボイラ１００からの蒸気を直接給水ポンプ駆動用タービン１０３に供給して、過速度試験などを行う必要があった。すなわち、高圧タービン１０１からの蒸気をボイラ１００や給水ポンプ駆動用タービン１０３に供給する再熱蒸気系統管１０６のエルボ継手１０６ａ（図２中Ａ部）を、図３に示すように取り外し、下流側の再熱蒸気系統管１０６ｂの開口を塞ぎ板１０７で塞ぐ。そして、ボイラ１００からの蒸気を中圧タービン１０２および給水ポンプ駆動用タービン１０３側に流すバルブ１００ａを開けて、図２中矢印Ｆ１２に示すように、ボイラ１００からの蒸気を給水ポンプ駆動用タービン１０３に供給していた。   By the way, in a company inspection or the like that is periodically performed, a test such as an overspeed test may be performed by turning the feed water pump driving turbine 103. In this case, the steam flow from the high-pressure turbine 101 to the feed water pump driving turbine 103 is cut off, and the steam from the boiler 100 is directly supplied to the feed water pump driving turbine 103 to perform an overspeed test or the like. . That is, the elbow joint 106a (part A in FIG. 2) of the reheat steam system pipe 106 that supplies the steam from the high-pressure turbine 101 to the boiler 100 and the feed water pump driving turbine 103 is removed as shown in FIG. The opening of the reheat steam system pipe 106 b is closed with a closing plate 107. Then, the valve 100a for flowing the steam from the boiler 100 to the intermediate pressure turbine 102 and the feed water pump driving turbine 103 side is opened, and the steam from the boiler 100 is fed to the feed water pump driving turbine 103 as shown by an arrow F12 in FIG. Had to supply.

しかしながら、再熱蒸気系統管１０６は大口径で、大口径のエルボ継手１０６ａを取り外して塞ぎ板１０７を取り付けるには、多大な労力と時間とを要し、工事費がかさんでいた。しかも、再熱蒸気系統管１０６が高温になっているため、エルボ継手１０６ａの取り外しや塞ぎ板１０７の取り付けなどには冷却時間や安全対策が必要となり、さらに労力と時間とを要する。このため、過速度試験などをして設備を復旧させるには、長時間を要していた。   However, the reheat steam system pipe 106 has a large diameter, and it takes a lot of labor and time to remove the large diameter elbow joint 106a and attach the closing plate 107, and the construction cost is high. Moreover, since the reheat steam system pipe 106 is at a high temperature, the removal of the elbow joint 106a and the attachment of the closing plate 107 require a cooling time and safety measures, and further labor and time are required. For this reason, it took a long time to restore equipment by performing an overspeed test or the like.

そこでこの発明は、試験を容易かつ短時間に行うことが可能な給水ポンプ駆動用タービンに関する試験方法および発電設備を提供することを目的とする。   Accordingly, an object of the present invention is to provide a test method and a power generation facility related to a turbine for driving a feedwater pump that can be easily and quickly tested.

上記目的を達成するために請求項１に記載の発明は、ボイラと、発電用タービンと、復水器と、給水ポンプ駆動用タービンで駆動するボイラ給水ポンプと、を備え、ボイラで発生した蒸気を発電用タービンに供給し、発電用タービンを通過した蒸気を駆動蒸気として給水ポンプ駆動用タービンに供給して、給水ポンプ駆動用タービンの回転によってボイラ給水ポンプを駆動し、復水器からの復水をボイラに供給するとともに、生成された蒸気を所定圧の状態で補助蒸気として蓄え該補助蒸気を各種設備に供給する補助蒸気ヘッダを備えた発電設備において、前記補助蒸気ヘッダ内の補助蒸気を駆動蒸気として前記給水ポンプ駆動用タービンに供給する供給経路と、駆動蒸気を前記給水ポンプ駆動用タービンに、発電時においては、前記発電用タービン側から供給し、前記給水ポンプ駆動用タービンの過速度試験や保安装置試験を含む試験時においては、前記補助蒸気ヘッダから供給する切替手段と、を設けたことを特徴とする。
 In order to achieve the above object, the invention described in claim 1 includes a boiler, a power generation turbine, a condenser, and a boiler feed water pump driven by a feed water pump driving turbine, and steam generated in the boiler Is supplied to the turbine for power generation, and the steam that has passed through the turbine for power generation is supplied as drive steam to the turbine for driving the feedwater pump. The boiler feedwater pump is driven by the rotation of the turbine for driving the feedwater pump, and the steam from the condenser is restored. In the power generation facility having an auxiliary steam header that supplies water to the boiler, stores the generated steam as auxiliary steam in a state of a predetermined pressure, and supplies the auxiliary steam to various facilities, the auxiliary steam in the auxiliary steam header is Supply path for supplying driving steam to the feed water pump driving turbine, and driving steam to the feed water pump driving turbine, Supplied from the turbine side, the during testing including overspeed test and safety device testing of the water supply pump driving turbine, characterized in that a, a switching means for supplying the said auxiliary steam header.

この発明によれば、発電時においては、切替手段によって発電用タービン側（ボイラ側）から給水ポンプ駆動用タービンに駆動蒸気を供給し、試験時においては、切替手段によって補助蒸気ヘッダから給水ポンプ駆動用タービンに駆動蒸気を供給する。   According to the present invention, during the power generation, the switching means supplies the driving steam from the power generation turbine side (boiler side) to the feed water pump driving turbine, and during the test, the switching means drives the feed water pump from the auxiliary steam header. Drive steam is supplied to the turbine.

請求項１、２に記載の発明によれば、給水ポンプ駆動用タービンを回して過速度試験などの試験を行う場合には、補助蒸気ヘッダからの補助蒸気を駆動蒸気として給水ポンプ駆動用タービンに供給して試験を行うため、試験を容易かつ短時間に行うことが可能となる。すなわち、ボイラ（発電用タービン）からの蒸気を駆動蒸気として給水ポンプ駆動用タービンに供給して試験を行うのではないため、再熱蒸気系統管のエルボ継手を取り外して塞ぎ板を取り付けたり、試験後に再びエルボ継手を取り付けたりする必要がない。しかも、高温のエルボ継手を取り外したりする必要がないため冷却時間や安全対策を要しない。この結果、試験を容易かつ短時間に行うことが可能で、しかも、試験後の復旧を短時間で行うことが可能となる。さらに、補助蒸気ヘッダから駆動蒸気を供給するため、試験時においてはボイラを稼動する必要がない。   According to the first and second aspects of the invention, when a test such as an overspeed test is performed by turning the feed water pump driving turbine, the auxiliary steam from the auxiliary steam header is used as the driving steam to the feed water pump driving turbine. Since the test is performed by supplying the test, the test can be easily performed in a short time. That is, the steam from the boiler (power generation turbine) is not supplied to the feedwater pump drive turbine as the drive steam for testing, so the elbow joint of the reheat steam system pipe is removed and the closing plate is attached, There is no need to reattach the elbow joint later. Moreover, there is no need to remove the high temperature elbow joint, so cooling time and safety measures are not required. As a result, the test can be performed easily and in a short time, and recovery after the test can be performed in a short time. Furthermore, since the driving steam is supplied from the auxiliary steam header, it is not necessary to operate the boiler during the test.

また、請求項２に記載の発明によれば、給水ポンプ駆動用タービンへの駆動蒸気の供給元を切替手段によって切り替えることで、容易かつ短時間に発電運転や試験運転に対応することが可能となる。   Further, according to the invention described in claim 2, it is possible to easily and easily cope with the power generation operation and the test operation in a short time by switching the supply source of the driving steam to the feed water pump driving turbine by the switching means. Become.

以下、この発明を図示の実施の形態に基づいて説明する。   The present invention will be described below based on the illustrated embodiments.

図１は、この発明の実施の形態に係る発電ユニット（発電設備）１を示す概略構成図である。図中符号２はボイラで、このボイラ２で発生した主蒸気が、主蒸気管２１を介して高圧タービン（発電用タービン）３に供給される。また、高圧タービン３を通過した主蒸気が排気蒸気となって、第１の再熱蒸気管３１を介して（図中矢印Ｆ１の経路で）ボイラ２に送られ、ボイラ２で再加熱されて再熱蒸気として、第２の再熱蒸気管３２を介して中圧タービン（発電用タービン）４に供給される。さらに、中圧タービン４から排出された排気蒸気が、中圧配管４１を介して低圧タービン（発電用タービン）５に供給され、これらのタービン３〜５の回転によって、発電機６が稼働するようになっている。   FIG. 1 is a schematic configuration diagram showing a power generation unit (power generation facility) 1 according to an embodiment of the present invention. Reference numeral 2 in the drawing is a boiler, and main steam generated in the boiler 2 is supplied to a high-pressure turbine (power generation turbine) 3 through a main steam pipe 21. Also, the main steam that has passed through the high-pressure turbine 3 becomes exhaust steam and is sent to the boiler 2 via the first reheat steam pipe 31 (in the path indicated by arrow F1 in the figure) and reheated by the boiler 2. The reheated steam is supplied to the intermediate pressure turbine (power generation turbine) 4 through the second reheated steam pipe 32. Further, the exhaust steam discharged from the intermediate pressure turbine 4 is supplied to the low pressure turbine (power generation turbine) 5 through the intermediate pressure pipe 41, and the generator 6 is operated by the rotation of the turbines 3 to 5. It has become.

そして、低圧タービン５から排出された排気蒸気（水蒸気）は、復水器７に送られて復水されるようになっている。この復水器７とボイラ２とは、給水管７１を介して接続され、この給水管７１上には、ボイラ給水ポンプ８が配設されている。このボイラ給水ポンプ８には、給水ポンプ駆動用タービン９が連結され、この給水ポンプ駆動用タービン９と第１の再熱蒸気管３１のボイラ２よりも上流側とが、第１の駆動蒸気管９１を介して接続されている。そして、高圧タービン３から排出された排気蒸気が、第１の再熱蒸気管３１および第１の駆動蒸気管９１を介して（図中矢印Ｆ２の経路で）、駆動蒸気として給水ポンプ駆動用タービン９に供給される。これにより、給水ポンプ駆動用タービン９が回転し、この回転に伴ってボイラ給水ポンプ８が駆動して、復水器７からの復水が給水管７１を介してボイラ２に供給されるようになっている。   The exhaust steam (water vapor) discharged from the low-pressure turbine 5 is sent to the condenser 7 to be condensed. The condenser 7 and the boiler 2 are connected via a water supply pipe 71, and a boiler water supply pump 8 is disposed on the water supply pipe 71. The boiler feed water pump 8 is connected to a feed water pump drive turbine 9, and the feed water pump drive turbine 9 and the first reheat steam pipe 31 upstream of the boiler 2 are connected to the first drive steam pipe. 91 is connected. Then, the exhaust steam discharged from the high-pressure turbine 3 passes through the first reheat steam pipe 31 and the first drive steam pipe 91 (in the path indicated by the arrow F2 in the figure), and serves as a feed water pump driving turbine. 9 is supplied. As a result, the feed water pump driving turbine 9 rotates, and the boiler feed water pump 8 is driven along with this rotation so that the condensate from the condenser 7 is supplied to the boiler 2 via the feed water pipe 71. It has become.

また、第１の駆動蒸気管９１の上流側（ボイラ２側）には蒸気止弁（切替手段）９２が配設され、下流側（給水ポンプ駆動用タービン９側）には流量調整弁９３が配設されている。さらに、一端が補助蒸気ヘッダ１０に接続された第２の駆動蒸気管（供給経路）９４の他端が、蒸気止弁９２と流量調整弁９３との間に位置する第１の駆動蒸気管９１に接続されている。これにより、補助蒸気ヘッダ１０内の補助蒸気が、第２の駆動蒸気管９４を介して駆動蒸気として給水ポンプ駆動用タービン９に供給されるようになっている。   Further, a steam stop valve (switching means) 92 is disposed on the upstream side (boiler 2 side) of the first driving steam pipe 91, and a flow rate adjusting valve 93 is disposed on the downstream side (feed water pump driving turbine 9 side). It is arranged. Further, the first drive steam pipe 91 in which the other end of the second drive steam pipe (supply path) 94 having one end connected to the auxiliary steam header 10 is located between the steam stop valve 92 and the flow rate adjusting valve 93. It is connected to the. Thereby, the auxiliary steam in the auxiliary steam header 10 is supplied to the feed water pump driving turbine 9 as the driving steam through the second driving steam pipe 94.

この第２の駆動蒸気管９４は、小口径の管で、第２の駆動蒸気管９４には、取り出し弁（切替手段）９５が配設されている。そして、蒸気止弁９２と取り出し弁９５とによって、駆動蒸気を給水ポンプ駆動用タービン９に高圧タービン３側から供給するか、補助蒸気ヘッダ１０側から供給するかを切り替えるようになっている。つまり、蒸気止弁９２を開けて取り出し弁９５を閉じた状態では、高圧タービン３側からの排気蒸気（駆動蒸気）が給水ポンプ駆動用タービン９に供給され、蒸気止弁９２を閉じて取り出し弁９５を開けた状態では、補助蒸気ヘッダ１０側からの補助蒸気（駆動蒸気）が給水ポンプ駆動用タービン９に（図中矢印Ｆ３の経路で）供給される。   The second driving steam pipe 94 is a small-diameter pipe, and the second driving steam pipe 94 is provided with a take-off valve (switching means) 95. The steam stop valve 92 and the take-off valve 95 are used to switch between supplying the driving steam to the feed water pump driving turbine 9 from the high-pressure turbine 3 side or the auxiliary steam header 10 side. That is, in a state where the steam stop valve 92 is opened and the take-off valve 95 is closed, exhaust steam (driving steam) from the high-pressure turbine 3 side is supplied to the feed water pump drive turbine 9, and the steam stop valve 92 is closed and the take-off valve is closed. In the state where 95 is opened, auxiliary steam (driving steam) from the auxiliary steam header 10 side is supplied to the feed water pump driving turbine 9 (in the path indicated by arrow F3 in the figure).

ここで、補助蒸気ヘッダ１０は、蒸気を所定圧の状態で補助蒸気として蓄える（一時貯留する）補助蒸気系統であり、この実施の形態では、この発電ユニット１で生成された蒸気を蓄えるとともに、他の発電ユニットで生成された蒸気なども蓄えられるようになっている。また、補助蒸気ヘッダ１０内の補助蒸気は、ストレージタンクや燃料移送系統等の燃料配管などの加温用蒸気として供給されるようになっている。   Here, the auxiliary steam header 10 is an auxiliary steam system for storing (temporarily storing) steam as auxiliary steam in a state of a predetermined pressure. In this embodiment, the auxiliary steam header 10 stores the steam generated by the power generation unit 1, Steam generated by other power generation units can also be stored. Further, the auxiliary steam in the auxiliary steam header 10 is supplied as heating steam such as a fuel pipe such as a storage tank or a fuel transfer system.

次に、このような構成の発電ユニット１の作用および、給水ポンプ駆動用タービン９に関する試験方法について説明する。   Next, the effect | action of the electric power generation unit 1 of such a structure and the test method regarding the feed water pump drive turbine 9 are demonstrated.

まず、発電時においては、蒸気止弁９２を開けて取り出し弁９５を閉じた状態で、ボイラ２を稼働させる。これにより、ボイラ２で発生した主蒸気が高圧タービン３に供給され、その排気蒸気が主として第１の再熱蒸気管３１を介してボイラ２に送られるとともに、一部が第１の駆動蒸気管９１を介して駆動蒸気として給水ポンプ駆動用タービン９に供給される。このとき、流量調整弁９３の開度によって、駆動蒸気の供給量が調整される。そして、駆動蒸気の供給によって給水ポンプ駆動用タービン９が回転してボイラ給水ポンプ８が駆動し、復水器７からの復水がボイラ２に供給される。   First, during power generation, the boiler 2 is operated with the steam stop valve 92 opened and the take-off valve 95 closed. As a result, the main steam generated in the boiler 2 is supplied to the high-pressure turbine 3, and the exhaust steam is mainly sent to the boiler 2 via the first reheat steam pipe 31, and a part thereof is the first drive steam pipe. The feed steam is supplied to the turbine 9 for driving the feed water through 91. At this time, the supply amount of driving steam is adjusted by the opening degree of the flow rate adjusting valve 93. Then, by supplying the driving steam, the feed water pump driving turbine 9 is rotated to drive the boiler feed water pump 8, and the condensate from the condenser 7 is supplied to the boiler 2.

次に、定期的に行う事業者検査などにおいて、給水ポンプ駆動用タービン９の過速度試験や保安装置試験などを行う場合には、補助蒸気ヘッダ１０側からの補助蒸気を駆動蒸気として給水ポンプ駆動用タービン９に供給し、給水ポンプ駆動用タービン９を回転させて試験を行う。すなわち、蒸気止弁９２を閉じて取り出し弁９５を開けることで、補助蒸気ヘッダ１０側からの補助蒸気を給水ポンプ駆動用タービン９に供給し、その供給量は、流量調整弁９３の開度によって調整する。このとき、試験内容などに応じて、ボイラ給水ポンプ８を給水ポンプ駆動用タービン９から切り離してもよく、また、ボイラ２の稼働を停止してもよい。   Next, when an overspeed test or a safety device test of the turbine 9 for driving the feedwater pump is performed in a company inspection performed periodically, the feedwater pump is driven using the auxiliary steam from the auxiliary steam header 10 side as the driving steam. The test is performed by rotating the feed water pump driving turbine 9. That is, by closing the steam stop valve 92 and opening the take-off valve 95, the auxiliary steam from the auxiliary steam header 10 side is supplied to the feed water pump drive turbine 9, and the supply amount depends on the opening of the flow rate adjusting valve 93. adjust. At this time, the boiler feed pump 8 may be disconnected from the feed pump driving turbine 9 or the operation of the boiler 2 may be stopped according to the test contents.

ここで、保安装置試験としては、給水ポンプ駆動用タービン９の回転数が上昇することでターニングモータが自動停止することを確認する試験や、給水ポンプ駆動用タービン９の回転数が降下することで補助油ポンプが自動起動することを確認する試験、給水ポンプ駆動用タービン９の回転数が異常上昇することで非常調速装置が作動することを確認する試験、給水ポンプ駆動用タービン９の回転数が下がることでターニングモータが自動起動してターニングが開始することを確認する試験などが含まれる。そして、試験が終了した場合には、再び取り出し弁９５を閉じて蒸気止弁９２を開け、ボイラ２を稼働させることで、ボイラ給水ポンプ８が駆動し、復水器７からの復水がボイラ２に供給される。   Here, as the safety device test, a test for confirming that the turning motor automatically stops when the rotation speed of the feed water pump driving turbine 9 is increased, or that the rotation speed of the feed water pump driving turbine 9 is decreased. A test for confirming that the auxiliary oil pump is automatically started, a test for confirming that the emergency speed control device is activated when the rotational speed of the turbine 9 for driving the feedwater pump abnormally increases, and the rotational speed of the turbine 9 for driving the feedwater pump This includes a test that confirms that the turning motor starts automatically when turning down and turning starts. And when a test is complete | finished, the take-off valve 95 is closed again, the steam stop valve 92 is opened, the boiler 2 is operated, the boiler feed pump 8 drives, and the condensate from the condenser 7 is a boiler. 2 is supplied.

以上のように、この発電ユニット１および給水ポンプ駆動用タービン９に関する試験方法によれば、給水ポンプ駆動用タービン９に係る試験を行う場合には、補助蒸気ヘッダ１０の補助蒸気を駆動蒸気として給水ポンプ駆動用タービン９に供給して試験を行うため、試験を容易かつ短時間に行うことが可能となる。すなわち、ボイラ２からの蒸気を給水ポンプ駆動用タービン９に供給して試験を行うのではないため、第１の再熱蒸気管３１（再熱蒸気系統管）のエルボ継手を取り外して塞ぎ板を取り付けて特別の蒸気経路を確保したり、再びエルボ継手を取り付けたりする必要がない。しかも、高温のエルボ継手を取り外したりする必要がないため冷却時間や安全対策を要しない。さらに、蒸気止弁９２と取り出し弁９５を開閉するだけで、給水ポンプ駆動用タービン９への駆動蒸気の供給元を切り替えることができる。この結果、試運転などを含む試験を容易かつ短時間に行うことが可能で、しかも、試験後の発電復旧を短時間で行うことが可能となる。さらに、補助蒸気ヘッダ１０から駆動蒸気を供給するため、試験時においてはボイラ２を稼動する必要がない。   As described above, according to the test method related to the power generation unit 1 and the feed water pump driving turbine 9, when the test related to the feed water pump driving turbine 9 is performed, the auxiliary steam of the auxiliary steam header 10 is used as the driving steam to supply water. Since the test is performed by supplying the pump driving turbine 9, the test can be performed easily and in a short time. In other words, since the steam from the boiler 2 is not supplied to the feed water pump driving turbine 9 and the test is performed, the elbow joint of the first reheat steam pipe 31 (reheat steam system pipe) is removed to cover the sealing plate. There is no need to install to secure a special steam path or to reattach the elbow joint. Moreover, there is no need to remove the high temperature elbow joint, so cooling time and safety measures are not required. Furthermore, the supply source of driving steam to the feed water pump driving turbine 9 can be switched simply by opening and closing the steam stop valve 92 and the take-off valve 95. As a result, it is possible to easily perform a test including a trial run in a short time, and to recover the power generation after the test in a short time. Furthermore, since driving steam is supplied from the auxiliary steam header 10, it is not necessary to operate the boiler 2 during the test.

以上、この発明の実施の形態について説明したが、具体的な構成は、上記の実施の形態に限られるものではなく、この発明の要旨を逸脱しない範囲の設計の変更等があっても、この発明に含まれる。例えば、上記の実施の形態では、発電時において高圧タービン３から排気蒸気の一部を給水ポンプ駆動用タービン９に供給しているが、低温の再熱蒸気などを駆動蒸気として供給してもよい。   Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above embodiment, a part of the exhaust steam is supplied from the high-pressure turbine 3 to the feed water pump driving turbine 9 during power generation, but low-temperature reheat steam or the like may be supplied as driving steam. .

この発明の実施の形態に係る発電ユニットを示す概略構成図である。It is a schematic block diagram which shows the electric power generation unit which concerns on embodiment of this invention. 従来の発電ユニットを示す概略構成図である。It is a schematic block diagram which shows the conventional electric power generation unit. 図２の発電ユニットの再熱蒸気系統管のエルボ継手を取り外して塞ぎ板を取り付けた状態を示す図である。It is a figure which shows the state which removed the elbow joint of the reheat steam system pipe | tube of the electric power generation unit of FIG. 2, and attached the closing board.

符号の説明Explanation of symbols

１ 発電ユニット（発電設備）
２ ボイラ
３ 高圧タービン（発電用タービン）
４ 中圧タービン（発電用タービン）
５ 低圧タービン（発電用タービン）
６ 発電機
７ 復水器
８ ボイラ給水ポンプ
９ 給水ポンプ駆動用タービン
９２ 蒸気止弁（切替手段）
９３ 流量調整弁
９４ 第２の駆動蒸気管（供給経路）
９５ 取り出し弁（切替手段）
１０ 補助蒸気ヘッダ
1 Power generation unit (power generation equipment)
2 Boiler 3 High-pressure turbine (Power generation turbine)
4 Medium-pressure turbine (power generation turbine)
5 Low-pressure turbine (power generation turbine)
6 Generator 7 Condenser 8 Boiler feed pump 9 Feed water pump drive turbine 92 Steam stop valve (switching means)
93 Flow control valve 94 Second drive steam pipe (supply path)
95 Extraction valve (switching means)
10 Auxiliary steam header

Claims (1)

ボイラと、発電用タービンと、復水器と、給水ポンプ駆動用タービンで駆動するボイラ給水ポンプと、を備え、ボイラで発生した蒸気を発電用タービンに供給し、発電用タービンを通過した蒸気を駆動蒸気として給水ポンプ駆動用タービンに供給して、給水ポンプ駆動用タービンの回転によってボイラ給水ポンプを駆動し、復水器からの復水をボイラに供給するとともに、生成された蒸気を所定圧の状態で補助蒸気として蓄え該補助蒸気を各種設備に供給する補助蒸気ヘッダを備えた発電設備において、
前記補助蒸気ヘッダ内の補助蒸気を駆動蒸気として前記給水ポンプ駆動用タービンに供給する供給経路と、
駆動蒸気を前記給水ポンプ駆動用タービンに、発電時においては、前記発電用タービン側から供給し、前記給水ポンプ駆動用タービンの過速度試験や保安装置試験を含む試験時においては、前記補助蒸気ヘッダから供給する切替手段と、
を設けたことを特徴とする発電設備。
A boiler, a power generation turbine, a condenser, and a boiler feed water pump driven by a feed water pump driving turbine, supplying steam generated in the boiler to the power generation turbine, and passing the steam that has passed through the power generation turbine The steam supplied to the feedwater pump drive turbine is driven as the drive steam, and the boiler feedwater pump is driven by the rotation of the feedwater pump drive turbine to supply the condensate from the condenser to the boiler. In a power generation facility equipped with an auxiliary steam header that stores as auxiliary steam in a state and supplies the auxiliary steam to various facilities,
A supply path for supplying auxiliary steam in the auxiliary steam header as driving steam to the turbine for driving the feed water pump;
The driving steam is supplied to the feed water pump driving turbine from the power generating turbine side during power generation, and the auxiliary steam header is used during a test including an overspeed test and a safety device test of the feed water pump driving turbine. Switching means to supply from,
A power generation facility characterized by the provision of
JP2008146628A 2008-06-04 2008-06-04 Test method and power generation equipment for turbine for driving feedwater pump Active JP5183304B2 (en)

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4087860A (en) * 1977-07-08 1978-05-02 Westinghouse Electric Corp. System for multi-mode control of a boiler feedpump turbine
JPH01203604A (en) * 1988-02-10 1989-08-16 Toshiba Corp Auxiliary steam control device for feed water pump driving turbine
JPH03134206A (en) * 1989-10-20 1991-06-07 Toshiba Corp Steam turbine-generator equipment

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