JPH0979509A - Supply water degassing apparatus - Google Patents
Supply water degassing apparatusInfo
- Publication number
- JPH0979509A JPH0979509A JP23950295A JP23950295A JPH0979509A JP H0979509 A JPH0979509 A JP H0979509A JP 23950295 A JP23950295 A JP 23950295A JP 23950295 A JP23950295 A JP 23950295A JP H0979509 A JPH0979509 A JP H0979509A
- Authority
- JP
- Japan
- Prior art keywords
- condenser
- water
- supply water
- dissolved oxygen
- supplied
- 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.)
- Pending
Links
Landscapes
- Degasification And Air Bubble Elimination (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、蒸気原動機プラントの
運転に際し、サイクル不足水を復水器に補給するための
補給水系統に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a makeup water system for replenishing a condenser with cycle shortage water when operating a steam engine plant.
【０００２】[0002]
【従来の技術】蒸気原動機プラントを起動する際には、
ボイラに供給される給水を脱気する必要があるが、従来
の脱気方法は次の通りであった。プラントを起動のクリ
ーンアップ運転を行う際に、排水量と同量の補給水を復
水器に供給しなければならない。この時補給水は、タン
クからポンプ等により復水器に供給される。一方、タン
ク内の補給水は、プラントが停止している間の酸素の溶
け込みにより、溶存酸素が最大７０００ppb 程度と非常
に高くなっている。一方、ボイラに供給する復水中の溶
存酸素は、配管腐食やボイラスケ−ル付着防止を目的と
して５〜１０ppbに低減する必要がある。2. Description of the Related Art When starting a steam engine plant,
The water supplied to the boiler needs to be degassed, but the conventional degassing method was as follows. When performing a clean-up operation to start the plant, the same amount of make-up water as the amount of waste water must be supplied to the condenser. At this time, makeup water is supplied from the tank to the condenser by a pump or the like. On the other hand, the makeup water in the tank has a very high dissolved oxygen of about 7000 ppb due to the dissolution of oxygen while the plant is stopped. On the other hand, the dissolved oxygen in the condensate supplied to the boiler must be reduced to 5 to 10 ppb for the purpose of preventing pipe corrosion and boiler scale adhesion.
【０００３】そこで従来は、起動時にクリーンアップ系
統を使用して、復水器内の復水を脱気器に送水し、脱気
器からクリーンアップ管を通じて復水器に戻し循環させ
る。この時、脱気器へ蒸気を導入して加熱脱気を行い溶
存酸素を低減している。Therefore, conventionally, a condensate in a condenser is sent to a deaerator by using a cleanup system at the time of start-up, and the deaerator is circulated back to the condenser through a cleanup pipe. At this time, the dissolved oxygen is reduced by introducing steam into the deaerator and performing deaeration by heating.
【０００４】即ち、従来はサイクル内での脱気を行って
おり、サイクル不足水を供給する補給水系統では、脱気
を行っていなかった。例えば、特開昭59−68502 号「発
電プラントの復水脱気方法及びその装置」がある。That is, conventionally, deaeration was carried out in the cycle, and degassing was not carried out in the makeup water system for supplying cycle-deficient water. For example, there is JP-A-59-68502 “Condensed water degassing method and apparatus for power generation plant”.
【０００５】[0005]
【発明が解決しようとする課題】前述の従来技術の溶存
酸素低減方式では、多量に補給水を復水器へ補給するク
リーンアップ運転時においては、復水中の溶存酸素量が
増加することが懸念される。In the above-mentioned dissolved oxygen reduction system of the prior art, there is a concern that the amount of dissolved oxygen in the condensate increases during cleanup operation in which a large amount of make-up water is supplied to the condenser. To be done.
【０００６】本発明の目的は、前述の従来技術の問題点
に鑑み、復水に供給される補給水を加熱することによっ
て復水器へ導入した際にフラッシュし、蒸気分圧を上げ
空気分圧を下げ補給水中の空気を分離させることによっ
て、補給水中の溶存酸素を低減する手段を提供すること
である。In view of the above-mentioned problems of the prior art, an object of the present invention is to flush the make-up water supplied to the condensate to introduce it into the condenser by heating it to raise the vapor partial pressure to increase the air content. The purpose is to provide a means to reduce dissolved oxygen in the makeup water by reducing the pressure and separating the air in the makeup water.
【０００７】[0007]
【課題を解決するための手段】蒸気原動機プラントのサ
イクル不足水を供給する補給水系統において、復水器に
供給される補給水を加熱し、復水器内部でスプレーして
フラッシュさせ蒸気分圧を上げ空気分圧を下げることに
よって、補給水中の溶存酸素を分離できることから、結
果的に補給水中の溶存酸素を低減することが達成され
る。[Means for Solving the Problems] In a make-up water system for supplying cycle shortage water of a steam engine plant, make-up water supplied to a condenser is heated, and sprayed inside the condenser to be flushed to make steam partial pressure. The dissolved oxygen in the make-up water can be separated by raising the temperature to lower the air partial pressure, and as a result, the dissolved oxygen in the make-up water can be reduced.
【０００８】更に、補給水の加熱状態を制御し、所望の
溶存酸素低減量が得られるような制御装置を設けること
で達成できる。Further, it can be achieved by providing a control device for controlling the heating state of the makeup water so as to obtain a desired dissolved oxygen reduction amount.
【０００９】[0009]
【作用】補給水の溶存酸素低減の原理式は、次式のよう
に表わされ、空気の分圧を小さくすることで補給水中の
溶存酸素を低減することができる。The function of reducing dissolved oxygen in makeup water is expressed by the following equation. Dissolved oxygen in makeup water can be reduced by reducing the partial pressure of air.
【００１０】[0010]
【数１】 [Equation 1]
【００１１】ＤＯ2：溶存酸素量［ppb］ Ｐair：空気分圧［psi］ Ｈ ：ヘンリー定数 従って、補給水を復水器へ供給するとき、補給水を復水
器真空度の飽和温度以上まで加熱し、その加熱された補
給水を復水器内部へスプレーしフラッシュさせ、蒸気分
圧を上げ空気分圧を下げることにより溶存酸素を分離
し、補給水中の溶存酸素濃度を低減することができる。DO 2 : Dissolved oxygen amount [ppb] Pair: Air partial pressure [psi] H: Henry's constant Therefore, when supplying make-up water to the condenser, make-up water up to the saturation temperature of the condenser vacuum degree or higher. It is possible to separate dissolved oxygen by heating, spraying and flushing the heated makeup water into the condenser, and increasing the vapor partial pressure to lower the air partial pressure to reduce the dissolved oxygen concentration in the makeup water. .
【００１２】[0012]
【実施例】以下、本発明の一実施例を図１により説明す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
【００１３】補給水系統は、復水器１のレベルが低下す
ると補給水を貯蔵しているタンク２から補給水が供給さ
れ復水器１のレベルを規定値となるよう制御される。こ
の補給水を補給する系統のタンク２と復水器１との間に
補給水を加熱する表面接触式加熱器３を設置し、加熱器
出口の補給水管には、温度検出器７を設け、この温度に
より加熱器へ供給される蒸気流量を制御する調節弁８で
構成される。又、復水器１の内部には、供給された補給
水をスプレーするスプレーノズル部６が設置されてい
る。更に復水器には、空気抽出管１０を介して空気抽出
器１１が設置され、復水器１の底部からは復水をボイラ
側へ供給する復水管１２と復水ポンプ１３が設置されて
いる。When the level of the condenser 1 is lowered, the makeup water system is controlled so that the makeup water is supplied from the tank 2 storing the makeup water and the level of the condenser 1 becomes a specified value. A surface contact type heater 3 for heating the makeup water is installed between the tank 2 of the system for replenishing the makeup water and the condenser 1, and a temperature detector 7 is provided in the makeup water pipe at the heater outlet, It is composed of a control valve 8 that controls the flow rate of steam supplied to the heater according to this temperature. Further, inside the condenser 1, a spray nozzle portion 6 for spraying the supplied makeup water is installed. Further, an air extractor 11 is installed in the condenser via an air extracting pipe 10, and a condenser pipe 12 and a condensate pump 13 for supplying condensed water from the bottom of the condenser 1 to the boiler side are installed. There is.
【００１４】前述の構成からなる補給水系統において、
多量の溶存酸素を含んだ補給水を所要溶存酸素量（１０
〜５ppb ）にするために、次のような手順で溶存酸素量
を低減する。In the makeup water system having the above-mentioned structure,
Make-up water containing a large amount of dissolved oxygen required dissolved oxygen amount (10
In order to obtain ~ 5 ppb), the amount of dissolved oxygen is reduced by the following procedure.
【００１５】復水器１に貯水されている復水は、復水ポ
ンプ１３によりボイラへ供給される。この時復水器内の
復水貯水レベルが低下すると補給水を貯蔵しているタン
ク２から復水器１へ補給水を供給し、復水器貯水レベル
を規定レベルになるよう制御されている。一方、起動時
には、復水器１からボイラまでの配管をクリーンアップ
する為に多量の復水を排水することになる、排水した復
水の量とほぼ同量の補給水を補給水の貯蔵されているタ
ンク２から復水器１へ供給する。供給される補給水は、
補給水の貯蔵されているタンク２から復水器１の間に設
置されている加熱器３で補給水を３０℃程度まで加熱し
復水器内に導入される。この時、加熱器出口に設置され
ている温度検出器７は、加熱された補給水の温度を検出
し、所望の温度になるように蒸気流量を制御する調節弁
８を調節する。復水器内は、高真空状態で運転されてお
り、復水器内部スプレーノズル部６で加熱された補給水
は、フラッシュし蒸気分圧が上がり空気分圧が下がるこ
とから補給水中の溶存酸素が分離され、補給水中の溶存
酸素量は低減する。例えば、復水器真空度７３５mmＨｇ
(Ｖac.）状況下では、その圧力下での飽和温度２５.８
℃ 以上に昇温しスプレーしてフラッシュさせることに
より溶存酸素を分離することができる。ここで、補給水
をスプレーしフラッシュさせるのは蒸気分圧を上げ空気
分圧を下げて溶存酸素の分離を促すのが目的である。分
離された酸素は、空気抽出管を介して空気抽出器に導か
れ系外に排出される。Condensate stored in the condenser 1 is supplied to the boiler by a condensate pump 13. At this time, when the condensate water storage level in the condenser decreases, the makeup water is supplied from the tank 2 that stores the makeup water to the condenser 1, and the condenser storage water level is controlled to reach the specified level. . On the other hand, at startup, a large amount of condensate will be drained in order to clean up the piping from the condenser 1 to the boiler. It is supplied to the condenser 1 from the existing tank 2. The supplied makeup water is
The make-up water is heated to about 30 ° C. by the heater 3 installed between the tank 2 in which the make-up water is stored and the condenser 1, and introduced into the condenser. At this time, the temperature detector 7 installed at the heater outlet detects the temperature of the heated make-up water and adjusts the control valve 8 that controls the flow rate of steam so that the desired temperature is reached. The inside of the condenser is operated in a high vacuum state, and the makeup water heated by the spray nozzle 6 inside the condenser is flushed and the steam partial pressure rises and the air partial pressure decreases, so the dissolved oxygen in the makeup water is dissolved. Are separated, and the amount of dissolved oxygen in the makeup water is reduced. For example, condenser vacuum degree 735mmHg
(Vac.) Situation, the saturation temperature under that pressure is 25.8
Dissolved oxygen can be separated by raising the temperature to ℃ or higher and spraying and flashing. Here, the purpose of spraying and flushing make-up water is to accelerate the separation of dissolved oxygen by raising the vapor partial pressure and lowering the air partial pressure. The separated oxygen is guided to the air extractor via the air extraction pipe and discharged to the outside of the system.
【００１６】以上のように、本実施例によれば復水器１
に導入される補給水の溶存酸素が、所要溶存酸素となる
ことから、起動時間を短縮する効果がある。As described above, according to this embodiment, the condenser 1
Since the dissolved oxygen in the makeup water introduced into the tank becomes the required dissolved oxygen, there is an effect of shortening the starting time.
【００１７】本実施例では、表面接触式加熱器で説明し
たが、補給水を加熱する方法は、直接加熱方式（第２の
実施例：図２），電気加熱方式（第３の実施例：図３）
等あらゆる加熱方式が実施可能である。又、加熱器出口
の温度を検出して自動で制御する方法以外に、手動によ
る加熱方式（第４〜６の実施例：図４〜６）でも実施可
能であることは言うまでもない。In this embodiment, the surface contact type heater has been described, but the method for heating the makeup water is a direct heating method (second embodiment: FIG. 2) or an electric heating method (third embodiment: (Fig. 3)
Any heating method can be implemented. Further, it goes without saying that a manual heating method (fourth to sixth embodiments: FIGS. 4 to 6) can be used in addition to the method of detecting the temperature of the heater outlet and automatically controlling it.
【００１８】[0018]
【発明の効果】本発明によれば、発電プラントを起動す
る際に復水器に補給される補給水の溶存酸素の低減がで
きると共に、発電プラントの起動時間を短縮することも
できる。According to the present invention, it is possible to reduce the dissolved oxygen in the makeup water supplied to the condenser when the power plant is started up, and to shorten the startup time of the power plant.
【図１】本発明の第１の実施例の系統図。FIG. 1 is a system diagram of a first embodiment of the present invention.
【図２】本発明の第２の実施例の系統図。FIG. 2 is a system diagram of a second embodiment of the present invention.
【図３】本発明の第３の実施例の系統図。FIG. 3 is a system diagram of a third embodiment of the present invention.
【図４】本発明の第４の実施例の系統図。FIG. 4 is a system diagram of a fourth embodiment of the present invention.
【図５】本発明の第５の実施例の系統図。FIG. 5 is a system diagram of a fifth embodiment of the present invention.
【図６】本発明の第６の実施例の系統図。FIG. 6 is a system diagram of a sixth embodiment of the present invention.
１…復水器、２…タンク、３…表面接触式加熱器、４…
直接加熱器、５…電気加熱器、６…スプレーノズル部、
７…温度検出器、８…蒸気調節弁、９…電源、１０…空
気抽出管、１１…空気抽出器、１２…復水管、１３…復
水ポンプ。1 ... Condenser, 2 ... Tank, 3 ... Surface contact heater, 4 ...
Direct heater, 5 ... electric heater, 6 ... spray nozzle,
7 ... Temperature detector, 8 ... Steam control valve, 9 ... Power supply, 10 ... Air extraction pipe, 11 ... Air extractor, 12 ... Condensate pipe, 13 ... Condensate pump.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 浦 勝己 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumi Ura 3-1-1, Saiwaicho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi factory
Claims (2)
補給水を加熱し、その加熱された補給水を復水器内部へ
スプレーすることにより補給水中の溶存酸素を低減する
補給水脱気装置。1. Make-up water degassing for reducing dissolved oxygen in make-up water by heating make-up water supplied to a condenser of a steam engine plant and spraying the heated make-up water into the condenser. apparatus.
るような制御装置を備えたことを特徴とする請求項１に
記載の補給水脱気装置。2. The makeup water degassing apparatus according to claim 1, further comprising a control device for controlling the makeup water temperature at the inlet of the condenser to a desired temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23950295A JPH0979509A (en) | 1995-09-19 | 1995-09-19 | Supply water degassing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23950295A JPH0979509A (en) | 1995-09-19 | 1995-09-19 | Supply water degassing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0979509A true JPH0979509A (en) | 1997-03-28 |
Family
ID=17045747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23950295A Pending JPH0979509A (en) | 1995-09-19 | 1995-09-19 | Supply water degassing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0979509A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101403130B1 (en) * | 2013-02-24 | 2014-06-11 | 주식회사 티에스엠텍 | Ventilator |
| CN109341370A (en) * | 2018-12-21 | 2019-02-15 | 上海康力诺电力设备有限公司 | A kind of condenser depth atomization deaerating plant |
-
1995
- 1995-09-19 JP JP23950295A patent/JPH0979509A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101403130B1 (en) * | 2013-02-24 | 2014-06-11 | 주식회사 티에스엠텍 | Ventilator |
| CN109341370A (en) * | 2018-12-21 | 2019-02-15 | 上海康力诺电力设备有限公司 | A kind of condenser depth atomization deaerating plant |
| CN109341370B (en) * | 2018-12-21 | 2023-09-29 | 上海康力诺电力设备有限公司 | Deep atomization deoxidizing device for condenser |
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