JP3537219B2 - Water hammer prevention device for water supply system - Google Patents
Water hammer prevention device for water supply systemInfo
- Publication number
- JP3537219B2 JP3537219B2 JP13554495A JP13554495A JP3537219B2 JP 3537219 B2 JP3537219 B2 JP 3537219B2 JP 13554495 A JP13554495 A JP 13554495A JP 13554495 A JP13554495 A JP 13554495A JP 3537219 B2 JP3537219 B2 JP 3537219B2
- Authority
- JP
- Japan
- Prior art keywords
- deaerator
- water
- gas injection
- control valve
- water supply
- 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 - Fee Related
Links
Landscapes
- Degasification And Air Bubble Elimination (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は発電用タービンプラント
のボイラ給水系に組み込んで使用するウォータハンマ防
止装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water hammer prevention apparatus incorporated in a boiler water supply system of a power generation turbine plant.
【0002】[0002]
【従来の技術】図6は発電用タービンプラントに使用さ
れている従来のボイラ給水系を示す図である。図におい
て、低圧給水加熱器(図示せず)からの復水は脱気器1
内において抽気管3からの抽気蒸気によって加熱脱気さ
れ、下部の貯水タンク2へ流入する。そして脱気器降水
管4a、遮断弁5a、給水ブースタポンプ6a、連絡管
7a、給水ポンプ8aを経て高圧給水加熱器に送られ、
図示しないボイラに給水される。2. Description of the Related Art FIG. 6 is a diagram showing a conventional boiler water supply system used in a power generation turbine plant. In the figure, condensate from a low pressure feed water heater (not shown) is supplied to a deaerator 1
Inside, it is heated and degassed by the bleed steam from the bleed pipe 3 and flows into the lower water storage tank 2. Then, it is sent to the high-pressure water heater through the deaerator downcomer 4a, the shutoff valve 5a, the water supply booster pump 6a, the connecting pipe 7a, and the water supply pump 8a.
Water is supplied to a boiler (not shown).
【0003】プラントの起動時にはボイラ給水中に大量
に溶解している空気を除去するために脱気器降水管4a
から分岐した脱気器循環管9を用いて脱気器循環ポンプ
10を稼働させることにより、ボイラ給水が脱気器1内を
循環して空気が除去される。[0003] At the start-up of the plant, a deaerator downcomer 4a is used to remove a large amount of air dissolved in the boiler feedwater.
Deaerator circulation pump using a deaerator circulation pipe 9 branched from
By operating 10, the boiler feedwater circulates in the deaerator 1 to remove air.
【0004】一般に、給水ポンプは複数台系列に分かれ
て構成されており、給水ポンプ8a系の他に脱気器降水
管4a、遮断弁5b、給水ブースタポンプ6b、連絡管
7b、給水ポンプ8b等が設置されている。これらのポ
ンプ類は蒸気タービンや電動機などによって駆動され、
一般に常用は蒸気タービン駆動、非常用は電動機駆動と
なっている。[0004] Generally, a plurality of feed water pumps are divided into a series, and in addition to a feed water pump 8a system, a deaerator downcomer 4a, a shutoff valve 5b, a feed water booster pump 6b, a connecting pipe 7b, a feed water pump 8b, and the like. Is installed. These pumps are driven by steam turbines, electric motors, etc.
Generally, the steam turbine drive is used for normal use, and the motor drive is used for emergency use.
【0005】[0005]
【発明が解決しようとする課題】プラント運転中、蒸気
タービンの負荷が低下すると、脱気器1内の圧力はこの
負荷にほぼ比例して低下し、貯水タンク2内の給水も器
内圧力の飽和温度に追従する。しかし、負荷遮断・所内
単独運転等で急激に負荷が低下すると、脱気器1へのタ
ービン抽気蒸気の給供も急激に減少することから、器内
圧力も急激に減少するが、貯水タンク2および脱気器降
水管4内の給水は負荷変化前の温度で残されることにな
り、器内圧力の飽和温度のままとなる。このため、貯水
タンク2および脱気器降水管4内の給水が自己蒸発し、
この気泡を含む給水が給水ブースタポンプ6aまで到達
する場合がある。運転中の給水ポンプ8a系ではこの給
水はそのまま連続して流れ、給水ブースタポンプ6aに
吸込まれて異常は生じないが、予備機として停止中の給
水ポンプ8b系の配管では水撃現象(以下ウォータハン
マと称する)が発生し、その振動によって配管系を損傷
したり、停止中の給水ブースタポンプ6bや給水ポンプ
8bの起動を不能にしたりする。また、貯水タンク2内
の気泡を含む水は貯水タンク2のレベル制御を不安定に
することがある。When the load on the steam turbine is reduced during the operation of the plant, the pressure in the deaerator 1 is reduced almost in proportion to this load, and the water supply in the water storage tank 2 is also reduced to the internal pressure. Follow the saturation temperature. However, when the load suddenly decreases due to load shedding, station-only operation, or the like, the supply of turbine extracted steam to the deaerator 1 also decreases rapidly, so that the internal pressure also decreases sharply. And the water supply in the deaerator downcomer 4 will be left at the temperature before the load change, and will remain at the saturation temperature of the internal pressure. For this reason, the water supply in the water storage tank 2 and the deaerator downcomer 4 self-evaporates,
In some cases, the water supply containing the air bubbles reaches the water supply booster pump 6a. In the feed water pump system 8a during operation, this feed water flows continuously as it is, and is sucked into the feed water booster pump 6a, so that no abnormality occurs. (Referred to as a hammer), and the vibration may damage the piping system or disable the stopped water supply booster pump 6b or the water supply pump 8b. Further, water containing bubbles in the water storage tank 2 may make level control of the water storage tank 2 unstable.
【0006】このため、従来の給水ポンプにおいては特
定の負荷域で脱気器降水管4内の給水を置換する目的で
脱気器循環ポンプ10を稼働させたり、脱気器1内の圧力
降下率を極力低くするため補助蒸気管11から補助蒸気を
投入したりして、給水ポンプ8b系のトラブルを防止し
ている。For this reason, in the conventional water supply pump, the deaerator circulation pump 10 is operated in order to replace the water supply in the deaerator downcomer pipe 4 in a specific load range, or the pressure drop in the deaerator 1 is reduced. Auxiliary steam is supplied from the auxiliary steam pipe 11 to reduce the rate as much as possible, thereby preventing troubles in the feedwater pump 8b system.
【0007】しかしながら、このような従来の給水系に
おけるウォータハンマ防止方法で対処しようとすると、
本来起動時の空気抜きを目的として設置している脱気器
循環ポンプ10の容量が不足し、意図した効果が得られな
い。また、補助蒸気量の制約があるため、気泡を含む水
によるトラブルを完全には防止できず、予備機としてス
タンドバイ中の給水ポンプ8b系の配管にウォータハン
マが発生したり、スタンドバイ中の給水ブースタポンプ
6bや給水ポンプ8bの起動が不能になることがある。However, when such a conventional method of preventing water hammer in a water supply system is used,
The capacity of the deaerator circulation pump 10, which is originally installed for the purpose of venting air at the time of startup, is insufficient, and the intended effect cannot be obtained. In addition, since there is a restriction on the amount of auxiliary steam, it is not possible to completely prevent trouble caused by water containing air bubbles, and a water hammer is generated in the piping of the feed water pump 8b as a standby unit, In some cases, the water supply booster pump 6b and the water supply pump 8b cannot be started.
【0008】そこで、本発明の目的は負荷遮断・所内単
独運転等が発生したとき、脱気器降水管および貯水タン
クでの給水の自己蒸発を確実に防ぐようにした給水系の
ウォータハンマ防止装置を提供することにある。Accordingly, an object of the present invention is to provide a water hammer prevention device for a water supply system which surely prevents self-evaporation of water supply in a deaerator downcomer and a water storage tank when a load rejection, an in-house operation, or the like occurs. Is to provide.
【0009】[0009]
【課題を解決するための手段】請求項1に係る発明は、
脱気器と連通させた貯水タンクと、この貯水タンク内の
給水を給水ポンプに導く脱気器降水管とを備えたものに
おいて、脱気器に不凝縮ガスを注入するガス注入制御弁
を備えた不凝縮ガス注入管を設け、負荷遮断・所内単独
運転時、前記ガス注入制御弁を開けて前記脱気器に不凝
縮ガスを注入することを特徴とする。Means for Solving the Problems According to claim 1 of the present invention,
A water tank connected to a deaerator, and a deaerator downcomer for guiding water in the water tank to a water supply pump, comprising a gas injection control valve for injecting non-condensable gas into the deaerator. A non-condensable gas injection pipe is provided to open the gas injection control valve and inject non-condensable gas into the deaerator during load shedding and single-site operation.
【0010】また、請求項2に係る発明は前記ガス注入
制御弁が不凝縮ガスの注入を通常停止時における脱気器
器内圧力の降下レートに従い制御する制御手段を備える
ことを特徴とする。[0010] The invention according to claim 2 is characterized in that the gas injection control valve is provided with control means for controlling the injection of the non-condensable gas in accordance with the rate of decrease in the pressure in the deaerator during normal stop.
【0011】また、請求項3に係る発明は前記ガス注入
制御弁が不凝縮ガスの注入を脱気器器内圧力と給水ポン
プ入口圧力との差圧に従い制御する制御手段を備えるこ
とを特徴とする。Further, the invention according to claim 3 is characterized in that the gas injection control valve is provided with control means for controlling the injection of the non-condensable gas in accordance with the pressure difference between the pressure inside the deaerator and the pressure at the inlet of the feed water pump. I do.
【0012】また、請求項4に係る発明はガス注入制御
弁が不凝縮ガスの注入を抽気逆止弁の開度信号により制
御する制御手段を備えることを特徴とする。さらに、請
求項5に係る発明は不凝縮ガス注入管の経路にガス注入
制御弁と並列に初期ガス注入制御弁を設けたことを特徴
とする。Further, the invention according to claim 4 is characterized in that the gas injection control valve is provided with control means for controlling the injection of the non-condensable gas by an opening signal of the bleed check valve. Further, the invention according to claim 5 is characterized in that an initial gas injection control valve is provided in the path of the non-condensable gas injection pipe in parallel with the gas injection control valve.
【0013】[0013]
【作用】脱気器に接続される不凝縮ガス注入管のガス注
入制御弁はたとえば負荷遮断、所内単独運転信号が与え
られたとき、全開する。このため、不凝縮ガス注入管を
通して不凝縮ガスが脱気器に流入し、器内圧力が大きく
降下する前に上昇する。この圧力降下が避けられること
で、脱気降水管および貯水タンクで給水が自己蒸発する
のを防ぐことができる。The gas injection control valve of the non-condensable gas injection pipe connected to the deaerator is fully opened, for example, when a load is cut off or a station alone operation signal is given. For this reason, the non-condensable gas flows into the deaerator through the non-condensable gas injection pipe, and rises before the pressure in the chamber drops significantly. By avoiding this pressure drop, the feedwater can be prevented from self-evaporating in the degassing downcomer and the water storage tank.
【0014】ガス注入制御弁は通常停止時の脱気器の圧
力降下レートに従い制御するか、脱気器器内圧力と給水
ポンプ入口圧力との差圧に従い制御する。また、抽気逆
止弁の開度信号により制御してもよい。これは時間遅れ
を最小に保って器内圧力を上昇させることができる。The gas injection control valve is controlled in accordance with the pressure drop rate of the deaerator at the time of a normal stop or in accordance with the differential pressure between the pressure in the deaerator and the inlet pressure of the feed water pump. Alternatively, the control may be performed by an opening signal of the bleed check valve. This can increase the internal pressure with a minimum time delay.
【0015】さらに、初期ガス注入制御弁は開閉速度の
速い制御弁とし、これをたとえば負荷遮断の発生した初
期段階で開放する。次いで器内圧力が安定したとき、ガ
ス注入制御弁を開くようにしてもよい。このようにする
ことにより時間遅れなく、不凝縮ガスを脱気器に導入す
ることができる。Further, the initial gas injection control valve is a control valve having a high opening / closing speed, and is opened, for example, at an initial stage when load interruption occurs. Next, when the internal pressure becomes stable, the gas injection control valve may be opened. By doing so, the non-condensable gas can be introduced into the deaerator without delay.
【0016】[0016]
【実施例】図1は本発明の実施例を示すボイラ給水系を
示す図である。図1において、脱気器1には不凝縮ガス
を注入するための不凝縮ガス注入管12がガス注入制御弁
13を介して接続されており、また脱気器1内の圧力を検
出する圧力発信器14が設置されている。この圧力発信器
14の圧力信号が制御器15に入力され、実機の脱気器1内
の規定時間での圧力降下レートが算出され、予め設定さ
れた通常停止時の最大圧力降下レートと比較して異常に
降下レートの大きい場合にガス注入制御弁13が開弁さ
れ、脱気器1内の圧力降下レートを規定レートに制御す
るようになっている。FIG. 1 is a diagram showing a boiler water supply system showing an embodiment of the present invention. In FIG. 1, a non-condensable gas injection pipe 12 for injecting non-condensable gas into a deaerator 1 is a gas injection control valve.
13 and a pressure transmitter 14 for detecting the pressure in the deaerator 1 is provided. This pressure transmitter
The pressure signal of 14 is input to the controller 15, the pressure drop rate in the deaerator 1 of the actual machine at a specified time is calculated, and the pressure drop rate is abnormally reduced in comparison with a preset maximum pressure drop rate at normal stop. When the rate is high, the gas injection control valve 13 is opened to control the pressure drop rate in the deaerator 1 to a specified rate.
【0017】図2は図1におけるガス注入制御弁13の制
御説明図である。ガス注入制御弁13は制御器15に取り込
んだ実機の脱気器1内の圧力降下と予め設定された通常
停止時の脱気器器内圧力最大降下レート、即ち通常停止
時の最大負荷降下レートに対応した脱気器器内圧力降下
レートを比較し、通常停止時には考えられない降下レー
トになった時点で脱気器1内の圧力制御を開始するもの
で、脱気器降水管4および貯水タンク2での自己蒸発を
防ぎウォータハンマを確実に防止し、また貯水タンク2
の水位制御を良好に保持する。FIG. 2 is a control explanatory diagram of the gas injection control valve 13 in FIG. The gas injection control valve 13 controls the pressure drop in the deaerator 1 of the actual machine taken into the controller 15 and a preset maximum pressure drop rate in the deaerator at a normal stop, that is, a maximum load drop rate at a normal stop. The pressure reduction rate in the deaerator 1 is compared with the pressure drop rate in the deaerator, and the pressure control in the deaerator 1 is started at a time when the rate of the pressure drop becomes inconceivable at the time of the normal stop. Prevents self-evaporation in the tank 2 and reliably prevents water hammer.
Water level control is maintained well.
【0018】また、図3は本発明の他の実施例を示すボ
イラ給水系を示す図である。図3において、脱気器1に
は不凝縮ガスを注入するための不凝縮ガス注入管12がガ
ス注入制御弁13を介して接続されている。また脱気器1
と給水ブースタポンプ6a、6b入口にそれぞれ配管を
介して、圧力発信器14、16a、16bが設置されており、
脱気器1内と脱気器降水管4下部、即ち給水ブースタポ
ンプ6入口の圧力が検出されるようになっている。これ
らの検出信号が制御器15に入り、差圧演算された差圧値
が規定値以下になると、制御器15からガス注入制御弁13
に制御信号が送られ差圧値が一定値になるよう脱気器1
の器内圧力を制御するようになっている。これにより脱
気器1の器内圧力は常に脱気器降水管4下部、即ち給水
ブースタポンプ6入口の圧力より一定値以上高く保持す
ることが可能となり、脱気器降水管4および貯水タンク
2での自己蒸発を防ぎ、ウォータハンマを確実に防止
し、また、貯水タンク2の水位制御を良好に保持する。FIG. 3 is a view showing a boiler water supply system according to another embodiment of the present invention. In FIG. 3, a non-condensable gas injection pipe 12 for injecting a non-condensable gas is connected to the deaerator 1 via a gas injection control valve 13. Also deaerator 1
And pressure feeders 14, 16a, 16b are installed at the inlets of the feed water booster pumps 6a, 6b via pipes, respectively.
The pressure inside the deaerator 1 and the lower part of the deaerator downcomer 4, that is, the pressure at the inlet of the feedwater booster pump 6 is detected. When these detection signals enter the controller 15 and the calculated differential pressure value becomes equal to or less than a specified value, the controller 15 sends the gas injection control valve 13
Control signal is sent to the deaerator 1 so that the differential pressure value becomes constant.
The pressure in the chamber is controlled. This makes it possible to keep the internal pressure of the deaerator 1 higher than the pressure at the lower part of the deaerator downcomer 4, that is, at the inlet of the water supply booster pump 6 by a certain value or more. To prevent self-evaporation, reliably prevent water hammer, and maintain good water level control of the water storage tank 2.
【0019】さらに、本発明の他の実施例を説明する。
図4において、ガス注入制御弁の制御開始タイミングを
上記実施例(図1)の脱気器器内圧力降下レートや、他
の実施例(図3)の脱気器器内圧力と脱気器降水管下部
の差圧信号で開始する代わりに、抽気逆止弁の開度信号
で行うようになっている。上記各実施例いずれも圧力信
号で制御開始タイミングを捉えているが、圧力信号の場
合は検出遅れが生じるため脱気器1への供給加熱蒸気量
が減少すると即座に動作する抽気逆止弁の開度信号で不
凝縮ガスの初期注入が行えるようにしたものである。Next, another embodiment of the present invention will be described.
In FIG. 4, the control start timing of the gas injection control valve is set to the pressure drop rate in the deaerator in the above embodiment (FIG. 1), and the pressure in the deaerator and the deaerator in another embodiment (FIG. 3). Instead of starting with the differential pressure signal at the lower part of the downcomer, it is performed with the opening signal of the bleed check valve. In each of the above embodiments, the control start timing is captured by the pressure signal. However, in the case of the pressure signal, the detection delay is caused, so that when the amount of the heating steam supplied to the deaerator 1 decreases, the bleed check valve operates immediately. The initial injection of the non-condensable gas can be performed by the opening degree signal.
【0020】さらに、上記のものと異なる実施例を説明
する。図5において、脱気器1には不凝縮ガスを注入す
るための不凝縮ガス注入管12が接続されており、不凝縮
ガス注入管12にはガス注入制御弁13と初期ガス注入制御
弁16が並列に設置されている。初期ガス注入制御弁17は
ガス注入制御弁13の開動作時間遅れを補助する目的で設
置しているので、制御器15の信号を受けて一定時間開弁
し、時間遅れなく不凝縮ガスの注入が可能なようにして
いる。これにより脱気器降水管4および貯水タンク2で
のフラッシュ発生を防止することができる。Further, an embodiment different from the above will be described. In FIG. 5, a non-condensable gas injection pipe 12 for injecting a non-condensable gas is connected to the deaerator 1. The non-condensable gas injection pipe 12 has a gas injection control valve 13 and an initial gas injection control valve 16. Are installed in parallel. Since the initial gas injection control valve 17 is installed to assist the delay of the opening operation time of the gas injection control valve 13, the valve is opened for a certain time in response to the signal of the controller 15, and the injection of the non-condensable gas is performed without time delay. To make it possible. As a result, it is possible to prevent a flash from being generated in the deaerator downcomer 4 and the water storage tank 2.
【0021】また、上記各実施例では脱気器1への不凝
縮ガス注入管12の接続口は1個で構成しているが、注入
口を2ケ所以上取付けるようにすれば、不凝縮ガス注入
時の脱気器1内での圧力分布を均一に保つことが可能に
なる。Further, in each of the above embodiments, the connection port of the non-condensable gas injection pipe 12 to the deaerator 1 is constituted by a single port. The pressure distribution in the deaerator 1 at the time of injection can be kept uniform.
【0022】また、不凝縮ガスの注入と補助蒸気の注入
を規定時間で切り換えるようにすることにより、脱気器
1と脱気器降水管4の圧力偏差が微小となり、安定状態
になった時点で本来の加熱脱気運転に移行し、不凝縮ガ
スの系外への排出もスムーズに行うことができる。Further, by switching between the injection of the non-condensable gas and the injection of the auxiliary steam in a specified time, the pressure deviation between the deaerator 1 and the deaerator downcomer 4 becomes very small, and when the stable state is reached. Then, the operation shifts to the original heating degassing operation, and the non-condensable gas can be smoothly discharged out of the system.
【0023】[0023]
【発明の効果】以上の説明から明らかなように本発明は
脱気器降水管および貯水タンクでの給水の自己蒸発を防
ぐことができ、ウォータハンマを確実に防止できると共
に、貯水タンクの水位制御を良好に保つことができる。As is clear from the above description, the present invention can prevent the self-evaporation of the water supply in the deaerator downcomer and the water storage tank, can reliably prevent water hammer, and control the water level of the water storage tank. Can be kept good.
【図1】本発明によるウォータハンマ防止装置の一実施
例を示す系統図。FIG. 1 is a system diagram showing one embodiment of a water hammer prevention device according to the present invention.
【図2】図1におけるガス注入制御弁の制御方法を示す
説明図。FIG. 2 is an explanatory diagram showing a control method of the gas injection control valve in FIG.
【図3】本発明の他の実施例を示す系統図。FIG. 3 is a system diagram showing another embodiment of the present invention.
【図4】本発明の制御回路を示す構成図。FIG. 4 is a configuration diagram showing a control circuit of the present invention.
【図5】本発明の他の実施例を示す系統図。FIG. 5 is a system diagram showing another embodiment of the present invention.
【図6】従来のボイラ給水系を示す系統図。FIG. 6 is a system diagram showing a conventional boiler water supply system.
1 脱気器 2 貯水タンク
3 タービン抽気管 4 脱気器降水管
5 遮断弁 6 給水ブースタポン
プ
7 連絡管 8 給水ポンプ
9 脱気器循環管 10 脱気器循環ポンプ
11 脱気器補助蒸気管 12 不凝縮ガス注入管
13 ガス注入制御弁 14 圧力発信器
15 制御器 16 圧力発信器
17 ガス注入初期制御弁DESCRIPTION OF SYMBOLS 1 Deaerator 2 Water storage tank 3 Turbine extraction pipe 4 Deaerator downcomer 5 Shut-off valve 6 Water supply booster pump 7 Communication pipe 8 Water supply pump 9 Deaerator circulation pipe 10 Deaerator circulation pump 11 Deaerator auxiliary steam pipe 12 Non-condensable gas injection pipe 13 Gas injection control valve 14 Pressure transmitter 15 Controller 16 Pressure transmitter 17 Gas injection initial control valve
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) F22D 1/28 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 7 , DB name) F22D 1/28
Claims (5)
貯水タンク内の給水を給水ポンプに導く脱気器降水管と
を備えたものにおいて、前記脱気器に不凝縮ガスを注入
するガス注入制御弁を備えた不凝縮ガス注入管を設け、
負荷遮断・所内単独運転時、前記ガス注入制御弁を開け
て前記脱気器に不凝縮ガスを注入することを特徴とする
給水系のウォータハンマ防止装置。1. A dewatering device comprising: a water storage tank communicating with a deaerator; and a deaerator downcomer for guiding water supplied from the water storage tank to a water supply pump, wherein non-condensable gas is injected into the deaerator. Providing a non-condensing gas injection pipe with a gas injection control valve,
A water hammer prevention device for a water supply system, wherein the gas injection control valve is opened to inject non-condensable gas into the deaerator during load shedding and in-house independent operation.
を通常停止時における該脱気器器内圧力の降下レートに
従い制御する制御手段を備えることを特徴とする請求項
1記載の給水系のウォータハンマ防止装置。2. The water supply system according to claim 1, wherein said gas injection control valve includes a control means for controlling the injection of the non-condensable gas in accordance with a rate of decrease in the pressure in the deaerator when the injection is normally stopped. Water hammer prevention device.
を該脱気器器内圧力と前記給水ポンプ入口圧力との差圧
に従い制御する制御手段を備えることを特徴とする請求
項1記載の給水系のウォータハンマ防止装置。3. The gas injection control valve according to claim 1, further comprising control means for controlling the injection of the non-condensable gas in accordance with a pressure difference between the pressure inside the deaerator and the pressure at the inlet of the feed water pump. Water hammer prevention equipment for water supply system.
を抽気逆止弁の開度信号により制御する制御手段を備え
ることを特徴とする請求項1記載の給水系のウォータハ
ンマ防止装置。4. The water hammer prevention device for a water supply system according to claim 1, wherein said gas injection control valve includes control means for controlling injection of non-condensable gas by an opening signal of a bleed check valve.
注入制御弁と並列に初期ガス注入制御弁を設けたことを
特徴とする請求項1記載の給水系のウォータハンマ防止
装置。5. The water hammer prevention device for a water supply system according to claim 1, wherein an initial gas injection control valve is provided in parallel with the gas injection control valve in a path of the non-condensable gas injection pipe.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13554495A JP3537219B2 (en) | 1995-06-02 | 1995-06-02 | Water hammer prevention device for water supply system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13554495A JP3537219B2 (en) | 1995-06-02 | 1995-06-02 | Water hammer prevention device for water supply system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08327010A JPH08327010A (en) | 1996-12-10 |
JP3537219B2 true JP3537219B2 (en) | 2004-06-14 |
Family
ID=15154270
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13554495A Expired - Fee Related JP3537219B2 (en) | 1995-06-02 | 1995-06-02 | Water hammer prevention device for water supply system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3537219B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103438430A (en) * | 2013-09-02 | 2013-12-11 | 苏州赛斯德工程设备有限公司 | Recovery system of condensation water |
CN104791261A (en) * | 2015-04-30 | 2015-07-22 | 中国能源建设集团广东省电力设计研究院有限公司 | Feed pump cavitation prevention device and method |
CN105179948A (en) * | 2015-09-28 | 2015-12-23 | 云南大红山管道有限公司 | Feedback signal access sound-light alarm device of pressure fluctuation pre-stop valve |
JP7093319B2 (en) * | 2019-02-21 | 2022-06-29 | 三菱重工業株式会社 | Operation method of condensate water supply system of thermal power plant and condensate water supply system of thermal power plant |
-
1995
- 1995-06-02 JP JP13554495A patent/JP3537219B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH08327010A (en) | 1996-12-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3279740B2 (en) | Power plant water supply equipment | |
US4651530A (en) | Method and apparatus for feed-water control in a steam generating plant | |
JP3537219B2 (en) | Water hammer prevention device for water supply system | |
KR20200102333A (en) | Condensate and feedwater system of steam power plant and operation method for the same | |
CN111457354B (en) | Input control method and device for feed water heating system of thermal power plant | |
JP2685204B2 (en) | Water supply pump control method and apparatus | |
JP3572461B2 (en) | Apparatus and method for preventing corrosion of boiler device | |
US6398510B1 (en) | Method and system for avoiding cavitation in a pump conveying saturated water | |
JP2519282B2 (en) | Deaerator water level control system | |
JP4045431B2 (en) | Reactor water injection equipment | |
JPH09145893A (en) | Condensate and feed device | |
JPH06347003A (en) | Feedwater pump for boiler | |
JPH1054507A (en) | Boiler feed water equipment | |
JPS6011605A (en) | Steam turbine control | |
JP2692056B2 (en) | Steam turbine equipment | |
JP2722308B2 (en) | Water supply system for multi-can boiler | |
JP3130662B2 (en) | Power plant water supply equipment | |
JPH08170805A (en) | Flashing-proof equipment | |
JPH11237004A (en) | Water-supply pump system controller | |
JPH0611104A (en) | Drain controller for feed water heater | |
JPH0626607A (en) | Device for preventing flooding of deaerator | |
JPH04369387A (en) | Automatic adjusting apparatus for vacuum degree of condenser | |
JP2679980B2 (en) | Control device for water supply drain pump up system | |
JPH0791608A (en) | Condensate recovery device | |
JP2799060B2 (en) | Feed water heater drain pump up device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20040312 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040316 |
|
LAPS | Cancellation because of no payment of annual fees |