JPH0144883B2 - - Google Patents
Info
- Publication number
- JPH0144883B2 JPH0144883B2 JP58018761A JP1876183A JPH0144883B2 JP H0144883 B2 JPH0144883 B2 JP H0144883B2 JP 58018761 A JP58018761 A JP 58018761A JP 1876183 A JP1876183 A JP 1876183A JP H0144883 B2 JPH0144883 B2 JP H0144883B2
- Authority
- JP
- Japan
- Prior art keywords
- condenser
- condensate
- pipe
- startup
- dissolved oxygen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 26
- 239000001301 oxygen Substances 0.000 claims description 26
- 229910052760 oxygen Inorganic materials 0.000 claims description 26
- 238000007872 degassing Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 238000004891 communication Methods 0.000 description 10
- 230000005574 cross-species transmission Effects 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- 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
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
- F01K9/02—Arrangements or modifications of condensate or air pumps
-
- 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]
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、コンバインドサイクルプラント内の
復水脱気系統に係り、更に詳しくには、多量の溶
存酸素を有する復水を保有する起動復水器に、所
望の溶存酸素を有する復水を保有する運転中復水
器から該復水を供給し、上記起動復水器が設けら
れたプラントの起動時間の短縮を図るコンバイン
ドサイクルプラントの復水脱気系統に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a condensate degassing system in a combined cycle plant, and more particularly, to a start-up condenser containing condensate containing a large amount of dissolved oxygen. A condensate dewatering system for a combined cycle plant that supplies condensate from an operating condenser containing condensate having a desired dissolved oxygen content to shorten the start-up time of a plant equipped with the above-mentioned start-up condenser. Concerning the air system.
近年、コンバインドサイクルプラントは、その
ミドル運用化が期待されている。ミドル運用化に
対応するためには、頻繁な起動、停止が要求され
る。停止時においては、復水器の復水内の溶存酸
素量が増加するため、起動時には、これを所望の
溶存酸素量を有する復水に脱気した後、ボイラ給
水し、ガスタービン等を起動しなければならな
い。しかしながら、第１図に示す如く、従来技術
の起動復水器２の脱気手段としては、起動復水器
２から送出される復水を復水再循環配管８によ
り、起動復水器２内に戻入すると共に、起動復水
器２内に、補助蒸気管１０から蒸気を導入した
り、空気抽出機４を起動復水器２に係合せしめ、
内部を真空に保持し、脱気を行なう手段が採用さ
れていた。従つて、起動復水器２内の復水が、所
望の溶存酸素量を有するものに到達する時間が長
く、プラントの起動時間がかかり、ミドル運用化
の障害となる欠点を有していた。
In recent years, combined cycle plants are expected to be used in the middle of the industry. Frequent startup and shutdown is required to support middle-level operation. When the condenser is stopped, the amount of dissolved oxygen in the condensate increases, so when the condenser is started, this is degassed into condensate with the desired amount of dissolved oxygen, then water is supplied to the boiler and the gas turbine, etc. is started. Must. However, as shown in FIG. 1, as a degassing means of the startup condenser 2 in the prior art, the condensate sent out from the startup condenser 2 is transferred into the startup condenser 2 through a condensate recirculation pipe 8. At the same time, steam is introduced into the startup condenser 2 from the auxiliary steam pipe 10, the air extractor 4 is engaged with the startup condenser 2,
A method was used to maintain the interior in a vacuum and degas it. Therefore, it takes a long time for the condensate in the start-up condenser 2 to reach the desired amount of dissolved oxygen, which results in a long start-up time for the plant, which has the drawback of hindering middle-level operation.
すなわち、第１図に示す如く、コンバインドサ
イクルプラント内には、複数個の復水器が配設さ
れ、運転中復水器１は目下運転中のものであり、
起動復水器２は、停止状態から起動状態におかれ
た復水器を示す。それぞれの復水器には同一の脱
気手段が係合している。起動復水器２および運転
中復水器１には復水管７が接続し、復水管７内に
介設される復水ポンプ５により復水は送出され
る。又、復水管７内には、復水を凝縮させるグラ
ンドコンテンサ６が介設される。復水管７のグラ
ンドコンデンサ６を出た位置には、復水再循環配
管８が分岐して接続し、復水再循環配管８は、復
水再循環弁９を介して、起動復水器２に接続して
いる。起動復水器２には、補助蒸気管１０から補
助蒸気調節弁１１を介して、蒸気が導入される。
又、起動復水器２には、空気抽出管３を介して空
気抽出機４が連結し、起動復水器２内を真空に保
持するようにしている。又、起動復水器２および
運転中復水器１には、補給水タンク１４から、補
給水配管１５および補給水調節弁１６を介して補
給水が導入されると共に、復水管７に分岐するス
ピルオーバ管１３により、スピルオーバ弁１２を
介し、余剰復水が補給水タンク１４に戻入され
る。 That is, as shown in FIG. 1, a plurality of condensers are installed in the combined cycle plant, and the condenser 1 is currently in operation.
The starting condenser 2 indicates a condenser placed in a starting state from a stopped state. Identical degassing means are associated with each condenser. A condensate pipe 7 is connected to the startup condenser 2 and the operating condenser 1, and condensate is sent out by a condensate pump 5 interposed in the condensate pipe 7. Further, a gland condenser 6 is provided in the condensate pipe 7 to condense condensate. A condensate recirculation pipe 8 is branched and connected to the position where the condensate pipe 7 exits the ground condenser 6, and the condensate recirculation pipe 8 is connected to the starting condenser 2 via a condensate recirculation valve 9. is connected to. Steam is introduced into the startup condenser 2 from an auxiliary steam pipe 10 via an auxiliary steam control valve 11 .
Further, an air extractor 4 is connected to the startup condenser 2 via an air extraction pipe 3 to maintain the inside of the startup condenser 2 in a vacuum. Also, makeup water is introduced into the startup condenser 2 and the running condenser 1 from the makeup water tank 14 via the makeup water piping 15 and the makeup water regulating valve 16, and is branched into the condensate pipe 7. Excess condensate is returned to the make-up water tank 14 by the spillover pipe 13 via the spillover valve 12 .
以上の系統により、起動復水器２の溶存酸素を
多く含んだ復水を循環させ、蒸気の導入および真
空保持することにより、脱気を促進し、復水を所
望の溶存酸素量を含むものにした後、ガスタービ
ンの起動を行う。しかし、起動復水器２内の復水
の溶存酸素量は最大7000ppb程度であり、一方、
ボイラに給水する復水の所望溶存酸素量は５ない
し10ppbと低い。従つて、上記の脱気系統では、
所望溶存酸素量に達するまでに約1.25時間も必要
となる。従つて、起動、停止頻度の多いミドル運
用化に対処し得ない欠点があつた。 With the above system, the condensate containing a large amount of dissolved oxygen in the startup condenser 2 is circulated, and by introducing steam and maintaining a vacuum, deaeration is promoted, and the condensate is made to contain the desired amount of dissolved oxygen. After that, start the gas turbine. However, the amount of dissolved oxygen in the condensate in the startup condenser 2 is about 7000 ppb at most, and on the other hand,
The desired amount of dissolved oxygen in the condensate water fed to the boiler is as low as 5 to 10 ppb. Therefore, in the above degassing system,
Approximately 1.25 hours are required to reach the desired amount of dissolved oxygen. Therefore, there was a drawback that it could not cope with middle operation where startup and shutdown were frequent.
本発明は、上記の欠点を解決すべく創案された
ものであり、その目的とするところは、特に大が
かりな装置を付加することなく構成簡単にしてコ
ンバインドサイクルプラントの起動準備時間を短
縮し、ミドル運用化を可能にし得るコンバインド
サイクルプラントの復水脱気系統を提供すること
にある。
The present invention was devised to solve the above-mentioned drawbacks, and its purpose is to shorten the start-up preparation time of a combined cycle plant by simplifying the configuration without adding any particularly large-scale equipment, and to reduce the startup preparation time of a combined cycle plant. The object of the present invention is to provide a condensate deaeration system for a combined cycle plant that can be put into operation.
本発明は、上記目的を達成するために、運転中
復水器と起動状態にある起動復水器との間に、起
動時に運転中復水器の復水を起動復水器へ流通さ
せる連結手段を設け、所望の溶存酸素量を有する
運転中復水器の復水を調節自在に起動復水器内に
導入し、起動復水器内の復水が所望の溶存酸素量
を有する状態になる時間を早め、コンバインドサ
イクルプラントの起動時間を短縮するようにした
コンバインドサイクルプラントの復水脱気系統を
特徴としたものである。
In order to achieve the above object, the present invention provides a connection between an operating condenser and a start-up condenser in a starting state, which allows condensate from the operating condenser to flow to the start-up condenser at the time of start-up. A means is provided to adjustably introduce condensate from the operating condenser having a desired amount of dissolved oxygen into the startup condenser so that the condensate in the startup condenser has the desired amount of dissolved oxygen. This system features a condensate degassing system for a combined cycle plant that speeds up the time required for the plant to start up and shortens the startup time of the combined cycle plant.
（発明の実施例〕
以下、本発明の一実施例を図面に基づいて説明
する。(Embodiment of the Invention) An embodiment of the present invention will be described below based on the drawings.
まず、本実施例の概要を第２図により説明す
る。運転中復水器１内の復水は所望の溶存酸素量
を有したものが循環されている。この運転中復水
器１の復水管７と起動復水器２の復水管７とを連
結手段である復水管連結管２２により連結し、そ
の間に復水管連絡弁２１、復水管連絡調節弁１
９，２０を配設する。 First, an outline of this embodiment will be explained with reference to FIG. During operation, condensate in the condenser 1 having a desired amount of dissolved oxygen is circulated. The condensate pipe 7 of the operating condenser 1 and the condensate pipe 7 of the start-up condenser 2 are connected by a condensate pipe connecting pipe 22 which is a connecting means, and a condensate pipe communication valve 21 and a condensate pipe communication control valve 1 are connected between them.
9 and 20 are arranged.
以上の構成により、運転中復水器１内の復水は
起動復水器２の復水管７に導入され、その後、起
動復水器２を有するプラントへ循環されて再び起
動復水器２に戻る。従つて、起動復水器２内の復
水の溶存酸素量は大幅に、かつ、速かに減少し、
短時間内に所望のものとなる。 With the above configuration, the condensate in the condenser 1 during operation is introduced into the condensate pipe 7 of the startup condenser 2, and then circulated to the plant having the startup condenser 2 and returned to the startup condenser 2. return. Therefore, the amount of dissolved oxygen in the condensate in the startup condenser 2 decreases significantly and quickly,
Get what you want within a short time.
次に、本実施例を更に詳しく説明する。 Next, this example will be explained in more detail.
運転中復水器１内の復水は、上記の如く所望の
溶存酸素量５ないし10ppbの状態に保持されて、
そのプラント内を循環している。運転中復水器１
の復水管７のグランドコンデンサ６の下流側に
は、復水管弁１８を介して連結手段の１つである
分岐管２４が接続し、この分岐管２４は復水管連
絡調節弁２０を介し、同じく連結手段の１つであ
る復水管連絡管２２に接続している。一方、起動
復水器２の復水管７にも、同様に復水管弁１７の
下流側に、復水管連絡調節弁１９を介して分岐管
２５が接続し、分岐管２５は、同じく復水管連絡
管２２に接続している。 During operation, the condensate in the condenser 1 is maintained at the desired dissolved oxygen level of 5 to 10 ppb as described above.
circulating within the plant. Condenser 1 during operation
A branch pipe 24, which is one of the connecting means, is connected to the downstream side of the grand condenser 6 of the condensate pipe 7 via a condensate pipe valve 18, and this branch pipe 24 is connected via a condensate pipe communication control valve 20 to the downstream side of the ground condenser 6. It is connected to a condensate pipe communication pipe 22, which is one of the connecting means. On the other hand, a branch pipe 25 is similarly connected to the condensate pipe 7 of the startup condenser 2 on the downstream side of the condensate pipe valve 17 via a condensate pipe communication control valve 19; It is connected to pipe 22.
以上の構成により、運転中復水器１内の復水の
１部は、分岐管２４、復水管連絡管２２および分
岐管２５により起動復水器２の復水管７に導入さ
れる。又、その導入量は復水管連絡調節弁１９，
２０等により調節される。 With the above configuration, a part of the condensate in the operating condenser 1 is introduced into the condensate pipe 7 of the startup condenser 2 through the branch pipe 24, the condensate pipe communication pipe 22, and the branch pipe 25. In addition, the amount introduced is determined by the condensate pipe communication control valve 19,
Adjusted by 20 etc.
起動復水器２の復水管７内に導入された所望の
溶存酸素量を有する復水は、上記の如く、起動復
水器２を有するプラントに循環された後、起動復
水器２内に導入される。このため、起動復水器２
内には、溶存酸素量が大きな復水と、所望の溶存
酸素量の復水が混合され、復水器２内の復水の溶
存酸素量が大幅に減少する。上記の如く、起動復
水器２には、運転中復水器１からの蒸気が導入さ
れるため、余剰復水となるが、この余剰復水は、
スピルオーバ弁１２を介し、スピルオーバ管１３
から補給水タンク１４に回収される。一方、運転
中復水器１は、復水の一部を起動復水器２に排出
するため、復水の不足が生じるが、この不足分
は、補給水タンク１４から、補給水配管１５、補
給水調節弁１６を介して導入される。補給水タン
ク１４にはスピルオーバ管１３からの溶存酸素量
の大きい復水が上記の如く導入されているため、
運転中復水器１に溶存酸素量の大きな復水が補充
される。しかし、補給水調節弁１６による流量調
節により、その復水を10ppb以下の溶存酸素量に
押えることができる。 The condensate having the desired amount of dissolved oxygen introduced into the condensate pipe 7 of the startup condenser 2 is circulated to the plant having the startup condenser 2 as described above, and then flows into the startup condenser 2. be introduced. For this reason, starting condenser 2
In the condenser 2, condensate with a large amount of dissolved oxygen and condensate with a desired amount of dissolved oxygen are mixed, and the amount of dissolved oxygen in the condensate in the condenser 2 is significantly reduced. As mentioned above, steam from the condenser 1 during operation is introduced into the startup condenser 2, resulting in surplus condensate.
Spillover pipe 13 via spillover valve 12
The water is collected from the water into the make-up water tank 14. On the other hand, since the operating condenser 1 discharges a part of the condensate to the start-up condenser 2, a shortage of condensate occurs, but this shortage is made up of the makeup water pipe 15 from the makeup water tank 14. The make-up water is introduced via the make-up water control valve 16. Since condensate with a large amount of dissolved oxygen is introduced into the make-up water tank 14 from the spillover pipe 13 as described above,
During operation, the condenser 1 is replenished with condensate containing a large amount of dissolved oxygen. However, by controlling the flow rate using the make-up water control valve 16, the amount of condensate can be suppressed to a dissolved oxygen amount of 10 ppb or less.
コンバインドサイクルプラントにおいては、運
転中復水器１は上記の１台に限定されず、複数器
のものが普通運転されている。従つて、起動復水
器２には、それぞれの転中復水器から所望の溶存
酸素量を有する復水が導入され得る。従つて、極
めて単時間内に起動復水器２の復水を所望の溶存
酸素量を含むものに変えることができる。以上に
より特に大がかりな装置を用いることなくコンバ
インドサイクルプラントの起動準備時間を大幅に
短縮することができる。 In a combined cycle plant, the number of condensers 1 in operation is not limited to the one described above, and a plurality of condensers 1 are usually operated. Therefore, condensate having a desired amount of dissolved oxygen can be introduced into the startup condenser 2 from each transfer condenser. Therefore, the condensate in the startup condenser 2 can be changed to one containing the desired amount of dissolved oxygen within a very short period of time. As a result of the above, the startup preparation time for a combined cycle plant can be significantly shortened without using particularly large-scale equipment.
以上の説明によつて明らかの如く、本発明によ
れば、構成簡単にしてコンバインドサイクルプラ
ントの起動準備時間を短縮し、そのミドル運用化
が可能となる効果が上げられる。
As is clear from the above description, according to the present invention, it is possible to simplify the configuration, shorten the start-up preparation time of a combined cycle plant, and make it possible to use the plant in the middle.
第１図は従来技術のコンバインドサイクルプラ
ントの復水脱気系統を示す系統図、第２図は本発
明の実施例の系統図である。
１……運転中復水器、２……起動復水器、３…
…空気抽出管、４……空気抽出器、５……復水ポ
ンプ、６……グランドコンデンサ、７……復水
管、８……復水再循環配管、９……復水再循環
弁、１０……補助蒸気管、１１……補助蒸気調節
弁、１２……スピルオーバ弁、１３……スピルオ
ーバ管、１４……補給水タンク、１５……補給水
配管、１６……補給水調節弁、１７，１８……復
水管弁、１９，２０，２８……復水管連絡調節
弁、２１……復水管連絡弁、２２……復水管連絡
管。
FIG. 1 is a system diagram showing a condensate degassing system of a conventional combined cycle plant, and FIG. 2 is a system diagram of an embodiment of the present invention. 1... Operating condenser, 2... Starting condenser, 3...
... Air extraction pipe, 4 ... Air extractor, 5 ... Condensate pump, 6 ... Gland condenser, 7 ... Condensate pipe, 8 ... Condensate recirculation piping, 9 ... Condensate recirculation valve, 10 ... Auxiliary steam pipe, 11 ... Auxiliary steam control valve, 12 ... Spillover valve, 13 ... Spillover pipe, 14 ... Makeup water tank, 15 ... Makeup water piping, 16 ... Makeup water control valve, 17, 18... Condensate pipe valve, 19, 20, 28... Condensate pipe communication control valve, 21... Condensate pipe communication valve, 22... Condensate pipe communication pipe.
Claims (1)
復水器か、復水器から送出される復水の１部を復
水器に戻入すると共に、夫々の復水器内に、蒸気
および真空を介在せしめて、所望の溶存酸素量を
有するように復水を脱気するコンバインドサイク
ルプラントの復水脱気系統において、所望の溶存
酸素量の復水を有する運転中復水器と前記起動復
水器との間に、起動時に、運転中復水器の復水を
起動復水器側へ流通させる連結手段を設けたこと
を特徴とするコンバインドサイクルプラントの復
水脱気系統。1.Equipped with a startup condenser and an operating condenser, each condenser or a part of the condensate sent out from the condenser is returned to the condenser, and a part of the condensate is In a condensate degassing system of a combined cycle plant that degasses condensate to have a desired amount of dissolved oxygen using steam and vacuum, an operating condenser having a desired amount of dissolved oxygen in condensate A condensate degassing system for a combined cycle plant, characterized in that a connecting means is provided between the starting condenser and the starting condenser to flow condensate from the operating condenser to the starting condenser at the time of starting. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1876183A JPS59145308A (en) | 1983-02-09 | 1983-02-09 | Condensing and deaerating system of combined cycle plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1876183A JPS59145308A (en) | 1983-02-09 | 1983-02-09 | Condensing and deaerating system of combined cycle plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59145308A JPS59145308A (en) | 1984-08-20 |
| JPH0144883B2 true JPH0144883B2 (en) | 1989-10-02 |
Family
ID=11980620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1876183A Granted JPS59145308A (en) | 1983-02-09 | 1983-02-09 | Condensing and deaerating system of combined cycle plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59145308A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59190410A (en) * | 1983-04-11 | 1984-10-29 | Hitachi Ltd | Condenser of combined plant |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55112811A (en) * | 1979-02-22 | 1980-09-01 | Toshiba Corp | Method of starting combined-cycle early |
-
1983
- 1983-02-09 JP JP1876183A patent/JPS59145308A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55112811A (en) * | 1979-02-22 | 1980-09-01 | Toshiba Corp | Method of starting combined-cycle early |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59145308A (en) | 1984-08-20 |
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