JPH07310999A - Fresh-water film type antifouling device - Google Patents
Fresh-water film type antifouling deviceInfo
- Publication number
- JPH07310999A JPH07310999A JP10316894A JP10316894A JPH07310999A JP H07310999 A JPH07310999 A JP H07310999A JP 10316894 A JP10316894 A JP 10316894A JP 10316894 A JP10316894 A JP 10316894A JP H07310999 A JPH07310999 A JP H07310999A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- fresh
- wall surface
- water
- fresh water
- 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
- Prevention Of Fouling (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は海水を移送する配管の
内面に海洋生物が付着し、生育するのを防止する淡水膜
式防汚装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fresh water film type antifouling device for preventing marine organisms from adhering to and growing on the inner surface of a pipe for transferring seawater.
【0002】[0002]
【従来の技術】火力、原子力発電プラントで使用される
復水器は、蒸気タービンの排気口に接続され、蒸気ター
ビンから排出される蒸気を冷却水で冷却して凝縮させ、
蒸気タービンの背圧を真空にすることにより、蒸気ター
ビンの蒸気入口と排気口の圧力差を大きくして蒸気ター
ビンからより多くのエネルギーを取り出すことを一目的
として設置されている。2. Description of the Related Art A condenser used in a thermal power plant or a nuclear power plant is connected to an exhaust port of a steam turbine and cools steam discharged from the steam turbine with cooling water to condense it.
By setting the back pressure of the steam turbine to be a vacuum, the pressure difference between the steam inlet and the exhaust port of the steam turbine is increased to extract more energy from the steam turbine.
【0003】この冷却水として海水が使用されることが
多いが、海から復水器に至る配管及び復水器から海に至
る配管においては、内壁面に貝・藻等の海棲生物が付着
し、そこで生育して壁面が凹凸になり配管内の流れ抵抗
を増大させる原因となる。また、海棲生物が壁面で生育
すると、厚い層が形成されて、この層が一挙に剥がれて
復水器へ流れ、復水器の伝熱管を塞ぎ、復水器の性能を
低下させたり、伝熱管から海水を漏洩させて発電プラン
トが運転停止を強いられるなどの問題を引き起こす。Seawater is often used as the cooling water, but in the piping from the sea to the condenser and the piping from the condenser to the sea, marine organisms such as shellfish and algae adhere to the inner wall surface. However, it grows there and the wall surface becomes uneven, which causes an increase in flow resistance in the pipe. Also, when marine organisms grow on the wall surface, a thick layer is formed and this layer peels off at once and flows to the condenser, blocking the heat transfer tube of the condenser and reducing the performance of the condenser, This causes problems such as leaking seawater from the heat transfer tubes and forcing the power plant to shut down.
【0004】このような問題を回避するために従来は海
棲生物が付着しにくい防汚塗料を配管など海水と接する
内壁面に塗ることにより海棲生物の付着を抑制していた
が、完全に防止することはできず、定期的にプラントを
停止させて壁面に付着した海棲生物を除去することが行
われている。In order to avoid such problems, conventionally, an antifouling paint to which marine organisms are unlikely to adhere has been applied to the inner wall surface such as a pipe which is in contact with seawater to suppress the adhesion of marine organisms. It cannot be prevented, and the plant is regularly shut down to remove marine organisms adhering to the wall surface.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、海棲生
物を除去するために発電プラントを停止するのは電力需
要が増す夏季には避けなければならない。また、海水温
度が高い地域においては毎週のように実施する必要があ
るが、可能な限り回数は少なくして電気出力の低下を抑
制することが求められる。However, shutting down the power plant to remove marine organisms must be avoided during the summer when the demand for electricity increases. Also, in regions where the seawater temperature is high, it is necessary to carry out every week, but it is required to reduce the number of times as much as possible to suppress the decrease in electrical output.
【0006】一方、この防汚塗料は経年劣化して海棲生
物が付着し易くなるので定期的に塗料を除去し、再度防
汚塗料を塗り直す作業が必要である。この対策以外にも
海水に薬液を投入することにより海棲生物を死滅させる
方法が一時期取られたこともあったが、海洋汚染という
別の問題が発生し、現在は行われていない。本発明の目
的は配管の内壁面を定期的に清掃する必要がなく、しか
も海洋汚染の問題を生じない淡水膜式防汚装置を提供す
ることにある。On the other hand, since this antifouling paint deteriorates with age and marine organisms tend to adhere to it, it is necessary to periodically remove the paint and reapply the antifouling paint. In addition to this countermeasure, there was a temporary method of killing marine organisms by introducing a chemical solution into seawater, but another problem of marine pollution occurred and it is not currently implemented. An object of the present invention is to provide a fresh water film type antifouling device which does not require periodic cleaning of the inner wall surface of a pipe and does not cause the problem of marine pollution.
【0007】[0007]
【課題を解決するための手段】本発明は海水を移送する
配管の壁面に透孔を設け、外部から河川水などの淡水を
透孔を通して流出させて配管の内面に海棲生物が付着
し、生育するのを防止するようにしたことを特徴とする
ものである。According to the present invention, a through hole is provided in a wall surface of a pipe for transferring seawater, fresh water such as river water is allowed to flow out from the outside through the through hole, and marine organisms adhere to the inner surface of the pipe. It is characterized in that it is adapted to prevent growth.
【0008】[0008]
【作用】海水と接する配管の壁面から淡水を徐々に流出
させると壁面から流出した淡水は壁面に沿って流れ透孔
から下流の一定区間に海水の濃度の低い淡水膜を形成
し、淡水は海水とはすぐには混ざらない。[Function] When fresh water gradually flows out from the wall surface of the pipe that is in contact with seawater, the freshwater flowing out from the wall flows along the wall surface and forms a freshwater film with a low concentration of seawater in a certain section downstream from the through hole. And do not mix immediately.
【0009】従って、海棲生物の卵・幼生は配管の壁面
に形成されている淡水膜に阻まれて壁面に近付けず付着
しにくくなる。また、海棲生物が壁面に近付きにくいの
で、壁面に産卵することが困難となる。Therefore, the eggs and larvae of the marine organisms are blocked by the fresh water film formed on the wall surface of the pipe, and do not come close to the wall surface, and are unlikely to adhere. In addition, since it is difficult for marine organisms to approach the wall surface, it is difficult to lay eggs on the wall surface.
【0010】仮に海水と接する配管の壁面に海棲生物が
産卵するか、あるいは、海棲生物の卵・幼生が流れてき
て付着したとしても、壁面近辺に淡水だけの場所あるい
は淡水と海水が入れ替わる場所となっているので、海棲
生物は死滅してしまう。Even if marine organisms lay eggs on the wall surface of the pipe that is in contact with seawater, or even if eggs and larvae of marine organisms flow and adhere, the place near the wall surface is only fresh water or fresh water and seawater are replaced. Because it is a place, marine life will die.
【0011】淡水だけの場所あるいは淡水と海水が入れ
替わる場所では海棲生物が死滅してしまうことは、河口
近辺において海棲生物がほとんど棲息していないこと及
び使用頻度の少ない海水を通す配管においては使用しな
い間、淡水を配管内に溜めて海棲生物の生育を防止して
効果を挙げていることから明かである。The fact that marine organisms die in a place where only fresh water or where fresh water and seawater are exchanged means that marine organisms are rarely inhabited in the vicinity of the estuary and that piping for passing seawater that is rarely used is used. While not in use, it is clear that fresh water is stored in the pipe to prevent the growth of marine organisms and to be effective.
【0012】このように配管の壁面に付着した卵・幼生
は生育せずに死滅してしまう。ここで、淡水が海棲生物
を死滅させてしまうのであるが、もともと自然現象とし
て雨水・河川水は海洋に流れ込んでいるものであるから
海洋汚染を全く引き起こすものでないことを明かであ
る。Thus, the eggs and larvae attached to the wall surface of the pipe do not grow and die. Here, it is clear that freshwater kills marine organisms, but since rainwater and river water originally flow into the ocean as a natural phenomenon, they do not cause marine pollution at all.
【0013】[0013]
【実施例】図2に本実施例の全体構成を示す。また、図
1は本実施例による淡水膜式防汚装置の詳細を示す。本
実施例は火力、原子力発電プラントの循環水管2に本発
明による淡水膜防汚装置3を設けたもので、循環水管2
に周方向のスリット状の流出孔4を長手方向に適度な間
隔を保って複数設けており、淡水供給配管5から供給さ
れる河川水を流出孔4から循環水管2内部へ流出させて
淡水膜6を形成するようにしている。EXAMPLE FIG. 2 shows the overall construction of this example. Further, FIG. 1 shows the details of the fresh water film type antifouling device according to the present embodiment. In this embodiment, a fresh water film antifouling device 3 according to the present invention is provided on a circulating water pipe 2 of a thermal power and nuclear power plant.
A plurality of circumferential slit-shaped outflow holes 4 are provided at appropriate intervals in the longitudinal direction, and the river water supplied from the freshwater supply pipe 5 is allowed to flow out from the outflow holes 4 into the circulating water pipe 2 to form a freshwater film. 6 is formed.
【0014】流出孔4の設置間隔は流出孔4から流出し
た淡水8が海水7と混ざり、壁面において海棲生物が棲
息できる海水濃度に戻らないことを考慮している。海水
7と接する循環水管2の壁面から淡水8を徐々に流出さ
せると、壁面から流出した淡水8は壁面に沿って流れ流
出孔4から下流の一定区間に海水の濃度の低い淡水膜6
を形成し、淡水8は海水7とはすぐには混ざらない。The installation intervals of the outflow holes 4 take into consideration that the fresh water 8 flowing out from the outflow holes 4 mixes with the seawater 7 and does not return to a seawater concentration where marine organisms can live on the wall surface. When the fresh water 8 gradually flows out from the wall surface of the circulating water pipe 2 that is in contact with the sea water 7, the fresh water 8 flowing out from the wall surface flows along the wall surface, and the fresh water film 6 with a low concentration of sea water flows in a certain section downstream from the outflow hole 4.
The fresh water 8 does not mix immediately with the sea water 7.
【0015】従って、海棲生物の卵・幼生は循環水管2
の壁面に形成されている淡水膜6に阻まれて壁面に近付
けず付着しにくくなる。また、海棲生物が壁面に近付き
にくいので壁面に産卵することが困難となる。Therefore, the eggs and larvae of marine organisms are circulated water pipe 2
Is blocked by the fresh water film 6 formed on the wall surface and does not come close to the wall surface and becomes difficult to adhere. In addition, since it is difficult for marine organisms to approach the wall surface, it is difficult to lay eggs on the wall surface.
【0016】仮に海水7と接する循環水管2の壁面に海
棲生物が産卵するか、あるいは、海棲生物の卵・幼生が
流れてきて付着したとしても、壁面近辺は淡水8だけの
場所あるいは淡水8と海水7が入れ替わる場所となって
いるので、海棲生物は死滅してしまう。Even if marine organisms lay eggs on the wall of the circulating water pipe 2 in contact with the seawater 7, or even if eggs and larvae of the marine organisms flow and adhere, the freshwater 8 is the only place near the wall or freshwater. 8 and 7 are replaced by each other, so marine life will die.
【0017】流出孔6の形状については後記の実施例の
ように構成しても良いが、その他の形状でも採用できる
ことはいうまでもない。また、復水器1の循環水管2で
はプラント内で排出される高温のドレンなどの熱水を壁
面から流出させ熱水膜を壁面に沿って形成することで海
棲生物を死滅させることができる。The shape of the outflow hole 6 may be configured as in the embodiment described later, but it goes without saying that other shapes can be adopted. Further, in the circulating water pipe 2 of the condenser 1, hot water such as high-temperature drainage discharged in the plant is discharged from the wall surface to form a hot water film along the wall surface, thereby killing marine organisms. .
【0018】本発明の他の実施例を図3を参照して説明
する。本実施例では上記実施例のスリット状の流出孔4
の代わりに多孔式の流出孔9を設けている。本実施例に
おいても、上記実施例と同様の効果を得ることができ
る。Another embodiment of the present invention will be described with reference to FIG. In this embodiment, the slit-shaped outflow hole 4 of the above embodiment is used.
Instead of the above, a porous outflow hole 9 is provided. Also in this embodiment, the same effect as that of the above embodiment can be obtained.
【0019】[0019]
【発明の効果】以上に説明したように、本発明による防
汚装置は淡水を使用しているので、海洋汚染の問題が全
くなく、また、配管の内面から淡水を流出させることに
より、海棲生物の付着及び生育を防止することができる
ので、海棲生物の生育により管内壁に凹凸ができて配管
内の流れ抵抗が増大するのを防止できる。また、壁面で
厚い層状に生育した海棲生物が剥離して復水器へ流れ、
復水器の伝熱管を塞ぎ、復水器の性能を低下させたり、
伝熱管から海水が漏洩してプラントの運転停止を強いら
れるなどの問題を解決することができる。As described above, since the antifouling device according to the present invention uses fresh water, there is no problem of marine pollution, and the fresh water can be discharged from the inner surface of the pipe to prevent marine pollution. Since it is possible to prevent organisms from adhering and growing, it is possible to prevent the flow resistance in the pipe from increasing due to unevenness on the inner wall of the pipe due to the growth of marine organisms. In addition, marine organisms that grew in a thick layer on the wall separated and flowed to the condenser,
Blocking the heat transfer tube of the condenser, reducing the performance of the condenser,
It is possible to solve the problem that seawater leaks from the heat transfer tube and the plant must be stopped.
【図1】本発明による淡水膜式防汚装置を示す断面図。FIG. 1 is a sectional view showing a fresh water film type antifouling device according to the present invention.
【図2】図1に示す防汚装置の装着状態を示す全体構成
図。FIG. 2 is an overall configuration diagram showing a mounted state of the antifouling device shown in FIG.
【図3】本発明の他の実施例を示す断面図。FIG. 3 is a sectional view showing another embodiment of the present invention.
1 復水器 2 循環水管 3 淡水膜式防汚装置 4,9 流出孔 5 淡水供給配管 6 淡水膜 7 海水 8 淡水 1 Condenser 2 Circulating water pipe 3 Freshwater film type antifouling device 4,9 Outflow hole 5 Freshwater supply pipe 6 Freshwater film 7 Seawater 8 Freshwater
Claims (3)
け、外部から河川水などの淡水を該透孔を通して流出さ
せて前記配管の内面に海棲生物が付着し、生育するのを
防止するようにしたことを特徴とする淡水膜式防汚装
置。1. A through hole is provided in a wall surface of a pipe for transferring seawater, and fresh water such as river water is allowed to flow from the outside through the through hole to prevent marine organisms from adhering to and growing on the inner surface of the pipe. A fresh water film-type antifouling device characterized in that
れる循環水管であることを特徴とする請求項1記載の淡
水膜式防汚装置。2. The fresh water film type antifouling device according to claim 1, wherein the pipe is a circulating water pipe connected to a condenser of a power plant.
洋に至る箇所の壁面から熱水を流出させるようにしたこ
とを特徴とする請求項2記載の淡水膜式防汚装置。3. The fresh water film type antifouling device according to claim 2, wherein hot water is allowed to flow out from a wall surface of the circulating water pipe from a condenser outlet to the ocean.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10316894A JPH07310999A (en) | 1994-05-18 | 1994-05-18 | Fresh-water film type antifouling device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10316894A JPH07310999A (en) | 1994-05-18 | 1994-05-18 | Fresh-water film type antifouling device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07310999A true JPH07310999A (en) | 1995-11-28 |
Family
ID=14346983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10316894A Pending JPH07310999A (en) | 1994-05-18 | 1994-05-18 | Fresh-water film type antifouling device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07310999A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012177639A (en) * | 2011-02-28 | 2012-09-13 | Hitachi-Ge Nuclear Energy Ltd | Water outlet sampling device of power generating plant |
-
1994
- 1994-05-18 JP JP10316894A patent/JPH07310999A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012177639A (en) * | 2011-02-28 | 2012-09-13 | Hitachi-Ge Nuclear Energy Ltd | Water outlet sampling device of power generating plant |
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