EP4013674A1 - Wasserfahrzeug und verfahren zum schutz für seewasser führende leitungen - Google Patents
Wasserfahrzeug und verfahren zum schutz für seewasser führende leitungenInfo
- Publication number
- EP4013674A1 EP4013674A1 EP20753920.6A EP20753920A EP4013674A1 EP 4013674 A1 EP4013674 A1 EP 4013674A1 EP 20753920 A EP20753920 A EP 20753920A EP 4013674 A1 EP4013674 A1 EP 4013674A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- watercraft
- seawater
- sea water
- electrical connection
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B59/00—Hull protection specially adapted for vessels; Cleaning devices specially adapted for vessels
- B63B59/04—Preventing hull fouling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B17/00—Methods preventing fouling
- B08B17/02—Preventing deposition of fouling or of dust
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/16—Electrodes characterised by the combination of the structure and the material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/20—Conducting electric current to electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
- B63B2013/005—Sea chests
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2002/005—Intakes for coolant medium other than sea chests, e.g. for ambient water
Definitions
- the invention relates to a device for the protection against fouling and corrosion of sea water inlets with connected pipelines in ships by means of anodes as an external current anodes.
- sulfate-reducing bacteria and balanids such as barnacles
- a reduction product produced is sulfide as the salt of hydrogen sulfide.
- This reacts directly with metals and creates so-called corrosion cells.
- Corrosion cells containing sulphide react anodically with areas containing oxygen and lead to the constant decomposition of the metal.
- the natural sulphide content of the lake water paired with sulphate-reducing organisms and bacteria are the reason for corrosion reactions of metallic surfaces in the form of electrochemical corrosion. It is known that these problems typical of shipbuilding can be countered by using different fouling and corrosion protection concepts.
- a method for the electrical protection of a shaft bushing of the shaft seal of ship propellers against corrosion is known, with a suitable flange part on the side of a flange part exposed to the sea water Shaft bushing at least one sacrificial anode block member is attached to the flange part in an easily exchangeable manner in a circumferential form.
- a sacrificial anode is arranged, which is attacked on several sides and thus makes it difficult to replace.
- a system for preventing fouling has become known from WO 2004/071863 A1, with separate anodes and cathodes being arranged in a seawater inlet, which cannot be exchanged as a compact unit.
- An antifouling system for sea water is known from WO 2010/022057 A1.
- the object of the invention is to create a device and a method for operating the device with which a seawater pipeline system can be protected effectively and efficiently as soon as the seawater enters a pressure hull, for example a submarine.
- This object is achieved by a watercraft with the features specified in claim 1 and by a method with the features specified in claim 7.
- the watercraft according to the invention has a sea water circuit.
- the sea water circuit has at least one sea water inlet.
- the watercraft has a side wall, the seawater inlet running at least partially in a wall duct through the side wall. At least in part, it should be understood that the seawater inlet runs completely through the ship's side, but can also have areas on the sea side of the ship's side.
- a device for anti-fouling and corrosion protection is arranged at the seawater inlet.
- the device has a grid and at least one first electrode.
- the first electrode and the grid are separated by an insulator.
- the first electrode at least partially encloses the seawater inlet.
- a complete enclosure is not absolutely necessary.
- the first electrode can be composed of two or more segments, as a result of which areas remain between the segments in which the first electrode is not arranged.
- support elements for holding the first electrode can be arranged here.
- the first electrode preferably surrounds the seawater inlet to at least 70%, more preferably to at least 80%, more preferably to at least 90%, more preferably to at least 95%.
- the first electrode is at least partially ring-shaped in the case of a round seawater inlet.
- the first electrode is at least partially in direct contact with the seawater.
- the grid and the first electrode are connected to the watercraft.
- the first electrode is connected to the interior of the boat via a first electrical connection.
- the first electrical connection runs through a second wall duct through the ship's side of the watercraft.
- the first wall duct and the second wall duct are spaced from one another.
- An arrangement of the first electrical connection in a second wall duct through the ship's side of the watercraft requires at least one further additional bore in the Drop side, which is technically complex.
- there are a number of advantages As a result of the arrangement in a separate second wall duct and not within the seawater line of the first wall duct, this is not reduced in size and another surface that could cause lime or living beings to adhere is avoided. Furthermore, the contact can thus take place inside the ship's side, so that the first electrical connection is not exposed in the sea water.
- ship's side means part of the hull, for example and in particular part of the pressure hull of the watercraft.
- partially ring-shaped is understood to mean that the first electrode is either completely ring-shaped or represents a segment of a circle.
- the latter is preferred if, for example, a first electrode and a second electrode are to be arranged.
- the first electrode and the second electrode will each represent a section of a circle.
- an annular element then preferably results again.
- the first electrode would only be partially ring-shaped, since it only forms part of the ring. If the cross-section of the seawater inlet is not round, but for example oval, the result is that the first electrode and possibly the second electrode correspondingly occupy a corresponding part of the oval cross-section, for example, of an “elongated ring”.
- the first electrode can be connected to the watercraft by means of screws.
- the advantage of this is the easy interchangeability.
- the first electrode and the grid are connected to one another. This means that both are combined in an exchange exchanged in a simple and quick exchange step.
- the grid is particularly preferably electrically insulated from the first electrode.
- the device has a second electrode.
- the first electrode particularly preferably comprises copper and the second electrode comprises iron.
- the first electrode is made of copper and the second electrode is made of iron.
- the first electrical connection has a first contact, the first contact being arranged parallel to the longitudinal direction of the seawater inlet.
- the first electrical connection has a first cable area.
- the first cable area is electrically connected to the first contact and leads into the interior of the watercraft at an angle to the longitudinal direction of the seawater inlet.
- the first contact is designed as a plug contact. This enables simple assembly and disassembly.
- the first contact can be designed as a screw contact. Installation and replacement are more complex here, but the electrical connection is more stable.
- first wall leadthrough and the second wall leadthrough therefore run parallel to one another and spaced apart in a first area of the ship's side, this first area being directed towards the sea side of the ship's side.
- first wall duct and the second wall duct therefore run at an angle and at a distance from one another.
- the distance between the first wall duct and the second wall duct to the interior of the watercraft is particularly preferably increased.
- the ship's side of the watercraft is a pressure hull.
- the ship's side of the watercraft is a pressure hull.
- the first electrical connection is in a first recess made from the outside and a second from the inside arranged recess, wherein the first recess and the second recess are connected to each other.
- the watercraft has at least one second electrode, the second electrode having a material that differs from the first electrode.
- the first electrode is made of copper and the second electrode is made of iron.
- the watercraft has a control device, the control device being designed to control the first electrode.
- the invention relates to a method of a watercraft according to the invention with a sea water circuit and a sea water inlet with a device for fouling and corrosion protection and a control device.
- the method has the following steps: a) detecting at least one first parameter, a) selecting at least one first current for a first electrode, a) generating the first current selected in step a) by means of a first
- Electrode and a first counter electrode wherein in step a) a parameter correlated to the volume flow of the seawater through the seawater inlet is selected as the first parameter.
- the selection in step a) can consist of a binary selection. For example, a distinction can be made between a closed inlet valve and an open inlet valve. In the first case there is a current of 0 A, in the second case a first current of i is selected. Similarly, a distinction can be made between an activated and an deactivated pump. In this case too, the first stream can be selected in binary. In a further improvement, different load states of a pump or several consumers that are connected can be recorded and corresponding first currents can be selected in accordance with an allocation table provided. For example, in the case of two pumps as consumers, the first one cannot Current of 0 A can be selected, with one running pump the first current in the amount of i is selected and with two running pumps in the amount of 2i.
- the factor correlated to the volume flow of the seawater is, for example, the opening state of an inlet valve or the load state or the power consumption of one or more pumps.
- the comparatively complex determination of the volume flow can be dispensed with.
- volume flow Another example of a factor correlated to the volume flow is, for example, the temperature of the water released again, or the temperature increase of the water in the watercraft. Since the amount of heat given off to the water, for example from the load condition of the cooled consumer, for example an engine, is known, the volume flow can be determined indirectly via the temperature difference and the heat capacity of the water.
- the method according to the invention can ensure that the first electrode generates a sufficient concentration of cations in the seawater, but this is limited to a minimum on the first electrode. Since seawater in particular is used for cooling purposes, the volume flow of the seawater often depends on the load conditions used by the respective consumer. The volume flow of the seawater therefore fluctuates. In order to generate the most constant possible concentration of cations in the lake water, an adjustment of the first stream is expedient.
- a first current is generated in step a) preferably with a constant current source.
- the voltage is adjusted to achieve the desired current.
- fluctuations occur regularly, especially at the beginning.
- the device particularly preferably has a limitation of the maximum voltage. This serves to prevent electrolysis of the surrounding water, for example the formation of oxygen (0 2 ) or chlorine (Cl 2 ). In this case it is accepted that the selected first current will not be reached.
- the method further comprises the following steps: g) selecting at least one second current for a second electrode, a) generating a second current by means of a second electrode and optionally a second counter-electrode,
- the material of the first electrode and the second electrode are particularly preferably different. This allows different cations to be released into the seawater in order to achieve different effects.
- a first copper electrode is selected as the first electrode in step a).
- the first stream is chosen in step a) so that there is a concentration of 0.5 ppm to 4 ppm, preferably from 1 ppm to 3 ppm, particularly preferably from 1.5 ppm to 2.5 ppm Cu 2+ ions in the volume flow of the lake water.
- the advantage of this embodiment is that the smallest possible amount of copper is released. On the one hand, this minimizes the load on the seawater and, on the other hand, extends the service life of the first electrode.
- At least one second parameter is recorded in step a), the salt content of the seawater being selected as the second parameter.
- the salinity of the Baltic Sea off Finland for example, is very different from the salinity of the North Sea, for example. This allows adaptation to the emission environment.
- the salt content can either be determined directly by measurement or from stored data. For example, it can be provided that the geoposition of the watercraft and data stored for this position area are used to determine the salt content of the same and, for example, are fed to the control of the power source.
- the main purpose of the salt content is to be able to better control the activation of the power source.
- the method additionally has the following steps: a) Determination of the total flow of charge from current and time, f) Determination of the point in time at which the first electrode was replaced.
- the service life of electrodes is usually specified in the form of a maximum charge flowing through it, since, for example, one copper ion goes into solution for every two electrons.
- the Faraday constant which is the product of the Avogadro constant and the elementary charge, a conversion between charge and amount of substance and with the molar mass directly into mass is possible.
- the method additionally has the following steps: e) Determining the material release of the first electrode.
- Fig. 6 cross section through the recesses in the pressure body
- a cross section through a seawater inlet is shown.
- the seawater inlet is arranged in a ship's side 10, in particular in the outer shell of a pressure hull.
- seawater is conducted into the interior of the watercraft, in particular the submarine, in order to be used, for example, as cooling water in a seawater circuit.
- the cooling water can be released back into the environment via a sea water outlet (not shown).
- a grid 50 is arranged as the first protective element, which prevents larger objects from entering.
- the grid 50 is also like this arranged that this is flush with the outside of the ship's side 10 in a first approximation and thus minimizes flow resistance.
- the grille 50 has a fastening ring 52.
- the first electrode 30 is contacted via a first electrical connection 40.
- the connection between the first electrical connection 40 and the first electrode 30 is shown in the enlarged detail in FIG. 2.
- the first electrical connection 40 is connected to the first electrode 30 via a first contact 90.
- the connection between the first contact 90 and the interior of the watercraft is established via the first cable region 80, the first electrical connection 40.
- the first cable area 80 is protected by a kink protection 82 in the connection area.
- the first electrical connection has three seals 70 in the case shown.
- the ship's side 10 has a thickening in the area of the seawater inlet. This is particularly preferred if the side wall 10 is a pressure body.
- the seawater inlet can be produced separately with the thickening of the ship's side 10 and then inserted into a hole in the thinner, continuous ship's side. After the connection, the entire ship's side 10 forms a firm connection, which must withstand high loads, particularly in the case of a pressure body. Therefore, the side wall 10 is seen here as continuous, even if it was composed of two parts.
- FIG. 3 only the first electrode 30, the grid 50 and the first electrical connection 40 (reduced to the first contact 90) are shown for the sake of simplicity.
- the first electrode 30 is surrounded by an insulator 60 in the entire contact area with the side wall 10 and the fastening ring 52 of the grid 50.
- the electrical contact between the first electrode 30 and the contact 90 is shown enlarged in FIG. 4.
- the common assembly of the first electrode 30 and the grid 50 via common screws 100 is particularly well shown in FIG. 5.
- the first electrode 30 can first be fixed by means of two screws 100.
- the grid 50 is then fastened with six further screws 100, whereby the first electrode 30 is also further fastened.
- FIG. 6 shows the first recess 110 and the second recess 120 which are made in the ship's side 10 of the watercraft in order to be able to accommodate the first electrical connection 40.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Prevention Of Electric Corrosion (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019212078.4A DE102019212078A1 (de) | 2019-08-13 | 2019-08-13 | Schutz für Seewasser führende Leitungen |
| PCT/EP2020/072148 WO2021028313A1 (de) | 2019-08-13 | 2020-08-06 | Wasserfahrzeug und verfahren zum schutz für seewasser führende leitungen |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4013674A1 true EP4013674A1 (de) | 2022-06-22 |
| EP4013674B1 EP4013674B1 (de) | 2023-12-06 |
| EP4013674C0 EP4013674C0 (de) | 2023-12-06 |
Family
ID=72039586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20753920.6A Active EP4013674B1 (de) | 2019-08-13 | 2020-08-06 | Wasserfahrzeug und verfahren zum schutz für seewasser führende leitungen |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4013674B1 (de) |
| KR (1) | KR102671949B1 (de) |
| DE (1) | DE102019212078A1 (de) |
| ES (1) | ES2973368T3 (de) |
| WO (1) | WO2021028313A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116142374B (zh) * | 2022-12-13 | 2026-02-10 | 中国船舶重工集团公司第七一九研究所 | 格栅、自流循环系统及船舶系统 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51130043A (en) * | 1975-04-25 | 1976-11-12 | Diamond Shamrock Corp | Device for taking in seawater |
| SU1119923A1 (ru) * | 1983-05-23 | 1984-10-23 | Предприятие П/Я А-1080 | Устройство дл предотвращени обрастани судовой конвективной вод ной системы |
| JPH09143950A (ja) * | 1995-11-29 | 1997-06-03 | Nakabootec:Kk | 電気防汚方法に使用する複合陽極および該陽極の寿命推定方法 |
| AU2009282593B2 (en) * | 2008-08-18 | 2014-01-23 | Evoqua Water Technologies Gmbh | Method and system for biofouling control of shipboard components |
| DE102009008069B4 (de) * | 2009-02-04 | 2011-02-24 | Tkms Blohm + Voss Nordseewerke Gmbh | Vorrichtung zum Bewuchs- und Korrosionsschutz vor Seewassereintritten in Schiffen |
| GB2519125A (en) * | 2013-10-10 | 2015-04-15 | Oceansaver As | Water treatment |
| KR101758830B1 (ko) * | 2015-05-08 | 2017-07-27 | (주) 테크로스 | 전기분해방식 선박평형수 처리장치 및 방법 |
-
2019
- 2019-08-13 DE DE102019212078.4A patent/DE102019212078A1/de not_active Ceased
-
2020
- 2020-08-06 ES ES20753920T patent/ES2973368T3/es active Active
- 2020-08-06 KR KR1020217035492A patent/KR102671949B1/ko active Active
- 2020-08-06 WO PCT/EP2020/072148 patent/WO2021028313A1/de not_active Ceased
- 2020-08-06 EP EP20753920.6A patent/EP4013674B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR102671949B1 (ko) | 2024-06-03 |
| EP4013674B1 (de) | 2023-12-06 |
| DE102019212078A1 (de) | 2021-02-18 |
| KR20210145250A (ko) | 2021-12-01 |
| WO2021028313A1 (de) | 2021-02-18 |
| ES2973368T3 (es) | 2024-06-19 |
| EP4013674C0 (de) | 2023-12-06 |
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