JPS586784B2 - Corrosion and antifouling methods for seawater intake - Google Patents
Corrosion and antifouling methods for seawater intakeInfo
- Publication number
- JPS586784B2 JPS586784B2 JP53101588A JP10158878A JPS586784B2 JP S586784 B2 JPS586784 B2 JP S586784B2 JP 53101588 A JP53101588 A JP 53101588A JP 10158878 A JP10158878 A JP 10158878A JP S586784 B2 JPS586784 B2 JP S586784B2
- Authority
- JP
- Japan
- Prior art keywords
- seawater
- steel casing
- steel
- chlorine
- intake
- 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
Classifications
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Description
【発明の詳細な説明】
本発明は、海水取水部の防蝕および防汚方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing corrosion and antifouling of a seawater intake section.
船舶、製鉄所、火力発電所等では、種々の目的で大量の
海水を利用している。Ships, steel mills, thermal power plants, etc. use large amounts of seawater for various purposes.
これ等の海水利用設備における海水取水用鋼製ケーシン
グの取水口には、海洋生物の付着防止およびその成長抑
制の目的で塩素含有水を鋼製ノズルにより噴射拡散させ
ている。In these seawater utilization facilities, chlorine-containing water is injected and diffused into the intake port of the steel casing for seawater intake using a steel nozzle for the purpose of preventing the adhesion of marine organisms and suppressing their growth.
しかるに、海水取水用鋼製ケーシングや鋼製ノズル、そ
の他の鋼製部材は、塩素含有水によって腐蝕し易く、そ
の防止策として流電陽極を前記鋼製ケーシング内に設け
ていたが、流電陽極は犠牲陽極であるため、定期的に新
品と交換しなければならず、その交換に手間がかかるこ
とから、交換管理が充分に行なわれない場合が応々にし
てあり無防蝕状態が生じるという人為的事故がある。However, steel casings for seawater intake, steel nozzles, and other steel parts are easily corroded by chlorine-containing water, and as a preventive measure, a galvanic anode was installed inside the steel casing, but the galvanic anode Since it is a sacrificial anode, it must be replaced with a new one periodically, and since it takes time and effort to replace it, there are cases where replacement management is not carried out adequately, resulting in a state of no corrosion protection. There is an accident.
また海水利用設備において海水の使用量が大幅に減少し
た場合は、そのまま塩素含有水を前記海水取水用鋼製ケ
ーシングの取水口に送給していると、鋼製ケーシング内
の塩素濃度が高くなり、鋼製ケーシング、鋼製ノズル、
その他の鋼製部材の窩蝕が懸念されることから、そのよ
うな場合には一般に塩素含有水の送給を停止している。In addition, if the amount of seawater used in seawater utilization equipment decreases significantly, if chlorine-containing water is directly fed to the intake port of the steel casing for seawater intake, the chlorine concentration inside the steel casing will increase. , steel casing, steel nozzle,
Because there is a concern that other steel members may be corroded, the supply of chlorine-containing water is generally stopped in such cases.
この塩素含有水の送給停止期間が長期に及ぶと、海洋生
物の付着および成長が進行し、取水口、鋼製ケーシング
内が順次汚損され、ついには海水利羽設備に至る取水管
路をも汚損され、海水利用設備に悪影響を及ぼすおそれ
がある。If the supply of chlorine-containing water is stopped for a long period of time, marine organisms will attach and grow, gradually contaminating the water intake and the inside of the steel casing, and eventually the water intake pipe leading to the seawater utilization facility will be contaminated. It may become contaminated and have a negative impact on seawater utilization equipment.
本発明は、かくの如き従来の諸問題を解決すべくなした
ものであって、その実施例を図面に基づき以下に説明す
る。The present invention has been made to solve these conventional problems, and embodiments thereof will be described below with reference to the drawings.
図において、１は、海水利用設備における海水取水用鋼
製ケーシング、２は、前記鋼製ケーシング１における取
水口、３は、前記鋼製ケーシング１から海水利用設備に
至る鋼製取水管路である。In the figure, 1 is a steel casing for seawater intake in seawater utilization equipment, 2 is a water intake in the steel casing 1, and 3 is a steel water intake pipe from the steel casing 1 to the seawater usage equipment. .
なお、前記取水口２には格子が設けられているものとす
る。It is assumed that the water intake port 2 is provided with a grid.
４は、前記取水口２の近傍の鋼製ケーシング１内に配置
されたノズルであって、このノズル４は、電気防蝕用不
溶性陽極材でなる。4 is a nozzle arranged in the steel casing 1 near the water intake 2, and this nozzle 4 is made of an insoluble anode material for electrical corrosion protection.
前記ノズル４は、絶縁物製フランジ５により、塩素含有
水送給用鋼製パイプ６の下端に連結されており、送給さ
れてきた塩素含有水を前記取水口２に向けて噴射拡散す
る。The nozzle 4 is connected to the lower end of a steel pipe 6 for supplying chlorine-containing water by an insulating flange 5, and sprays and diffuses the supplied chlorine-containing water toward the water intake port 2.
７は、前記鋼製ケーシング１外の任意個所に設けられた
電気防蝕用外部電源装置であって、そのプラス側を前記
ノズル４に、またマイナス側を前記鋼製ケーシング１に
それぞれ接続したのである。Reference numeral 7 denotes an external power supply device for electrical corrosion protection provided at any location outside the steel casing 1, the positive side of which is connected to the nozzle 4, and the negative side connected to the steel casing 1. .
なお、前記電気防蝕用外部電源装置７には、防蝕電流制
御回路が内蔵されているものとする。It is assumed that the external power supply device 7 for electrical corrosion protection has a built-in corrosion protection current control circuit.
しかして、前記ノズル４から塩素含有水を取水口２に向
けて噴射拡散することにより、取水口２、鋼製ケーシン
グ１内等の海水取水部における海洋生物の付着およびそ
の成長を防止できる。By spraying and diffusing chlorine-containing water from the nozzle 4 toward the water intake 2, it is possible to prevent the attachment and growth of marine organisms in the seawater intake portions such as the water intake 2 and the steel casing 1.
また前記外部電源装置７の出力電圧を、ノズル４と鋼製
ケーシング１間に印加することにより、ノズル４からの
防蝕電流が鋼製ケーシング１内の海水を介して鋼製ケー
シング１へ流入し、鋼製ケーシング１を主に、鋼製取水
管路３の一部、塩素含有水送給用鋼製パイプ６の一部を
それぞれ電気防蝕できる。In addition, by applying the output voltage of the external power supply device 7 between the nozzle 4 and the steel casing 1, the anticorrosion current from the nozzle 4 flows into the steel casing 1 via the seawater in the steel casing 1. Electrical corrosion protection can be applied mainly to the steel casing 1, a part of the steel water intake pipe 3, and a part of the chlorine-containing water supply steel pipe 6.
しかも前記ノズル４は、電気防蝕用不溶性陽極材である
ことから、外部電源法による防蝕電流を流してもその寿
命は半永久的であり、かつ防蝕電流の分布も均一であり
、極めて良好な電気防蝕を行なうことができる。Furthermore, since the nozzle 4 is made of an insoluble anode material for electrical corrosion protection, its lifespan is semi-permanent even when a corrosion protection current is applied by an external power supply method, and the distribution of the corrosion protection current is uniform, resulting in extremely good electrical corrosion protection. can be done.
さらに、海水利用設備において海水の使用量が大幅に減
少し、それにより塩素含有水の送給を停止しても、前記
防蝕電流によって鋼製ケーシング１内の海水中に、防蝕
電流１Ａ／Ａ当り約１ｇの塩素が生成されるので、塩素
含有水の送給停止中においても、取水口２、鋼製ケーシ
ング１内等の海水取水部における海洋生物の付着および
その成長を防止できる。Furthermore, even if the amount of seawater used in seawater utilization equipment is significantly reduced and the supply of chlorine-containing water is thereby stopped, the corrosion-protective current will cause the corrosion-protective current to flow into the seawater inside the steel casing 1 per 1A/A of the corrosion-protective current. Since about 1 g of chlorine is generated, even when the supply of chlorine-containing water is stopped, it is possible to prevent the attachment and growth of marine organisms in the seawater intake portions such as the water intake 2 and the steel casing 1.
図は本発明の実施例を示す要部の概略図である。 The figure is a schematic diagram of main parts showing an embodiment of the present invention.
Claims (1)
電気的に絶縁されて一体的に設けられた電気防蝕用不溶
性陽極材でなるノズルにより、塩素含有水を海水取水用
鋼製ケーシングの取水口に向けて噴射拡散し、かつこの
ノズルと鋼製ケーシング間に、海水を介して防蝕電流を
流すことを特徴とする海水取水部の防蝕および防汚方法
。1. Chlorine-containing water is transferred to a steel casing for seawater intake using a nozzle made of an insoluble anode material for electrical corrosion protection, which is electrically insulated and integrally installed at the lower end of a steel pipe for supplying chlorine-containing water. A method for preventing corrosion and antifouling of a seawater intake part, characterized by spraying and spreading an anticorrosion current toward a water intake port, and flowing an anticorrosion current through seawater between the nozzle and a steel casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53101588A JPS586784B2 (en) | 1978-08-21 | 1978-08-21 | Corrosion and antifouling methods for seawater intake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53101588A JPS586784B2 (en) | 1978-08-21 | 1978-08-21 | Corrosion and antifouling methods for seawater intake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5528731A JPS5528731A (en) | 1980-02-29 |
| JPS586784B2 true JPS586784B2 (en) | 1983-02-07 |
Family
ID=14304538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53101588A Expired JPS586784B2 (en) | 1978-08-21 | 1978-08-21 | Corrosion and antifouling methods for seawater intake |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS586784B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03106413A (en) * | 1989-09-21 | 1991-05-07 | Ngk Insulators Ltd | Water purification treatment process and its device |
| US8528511B2 (en) | 2005-09-23 | 2013-09-10 | Jp Scope, Inc. | Variable travel valve apparatus for an internal combustion engine |
| AU2006292105B2 (en) | 2005-09-23 | 2011-03-17 | Jp Scope, Inc. | Valve apparatus for an internal combustion engine |
| CN110088430A (en) | 2016-09-09 | 2019-08-02 | Jp领域股份有限公司 | Route-variable valve equipment for internal combustion engine |
-
1978
- 1978-08-21 JP JP53101588A patent/JPS586784B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5528731A (en) | 1980-02-29 |
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