EP1557351A1 - Method and arrangement for flushing ballast tanks - Google Patents
Method and arrangement for flushing ballast tanks Download PDFInfo
- Publication number
- EP1557351A1 EP1557351A1 EP05075102A EP05075102A EP1557351A1 EP 1557351 A1 EP1557351 A1 EP 1557351A1 EP 05075102 A EP05075102 A EP 05075102A EP 05075102 A EP05075102 A EP 05075102A EP 1557351 A1 EP1557351 A1 EP 1557351A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ballast tank
- ship
- water
- pipe
- arrangement
- 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.)
- Withdrawn
Links
Images
Classifications
-
- 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
Definitions
- the invention relates to a method for flushing a ballast tank of a ship, in the process of which water in the ballast tank is replaced by surrounding water, available outside the ship.
- the water which is originally present in the ballast tank may be let in during loading and unloading in a harbour, which means that it may contain contaminants present in the harbour, for example chemical pollutants or polluting micro-organisms. If the water present in the ballast tanks is subsequently discharged in another harbour, then these micro-organisms will be introduced into another ecosystem, which may cause problems. For that reason, some harbour authorities demand that before one puts in on the harbour, all ballast tanks of the ship must be flushed, which means that the water present in the ballast tanks must be replaced by relatively clean surrounding water present for example 200 miles outside the coast.
- This method is not without any risk; after all the ballast tanks have been filled with some purpose and there is always a possibility that when the ballast tank is pumped out the stability of the ship is reduced or that the tensions in the hull become too high, especially when there is a substantial wave load.
- the surrounding water is supplied to a bottom side of the ballast tank and the water originally present in the ballast tank is discharged via a vent duct placed on top of the ballast tank, across the deck and alongside the ship.
- this method is not without some risks as the deck may become very slippery, especially if one sails in a low temperature area.
- the vent duct may freeze and block, in which case it will no longer be possible to flush the ballast tanks and there is even a danger that a ballast tank tears if one attempts flushing it.
- the method according to the invention does not have these drawbacks and is characterised in that water is guided outside the ship below the water surface via an overflow pipe which runs at least partly inside the ballast tank.
- a favourable realisation of the inventive method is characterised in that at least part of the surrounding water, flowing into the ballast tank is directed towards the bottom of the ballast tank via a system of discharge openings, preferably in such a direction that surrounding water flowing into the ballast tank will cause turbulence on the bottom, as a result of which sediment that may be present on the bottom will be set free and carried off.
- a further favourable realisation is characterised in that at least part of the surrounding water, flowing into the ballast tank is directed towards the bottom of the ballast tank via a system of spray nozzles.
- These spray nozzles which are known as such, are designed such that the surrounding water will pour out in a well directed squirt.
- the squirts are preferably directed such that a powerful current is obtained near floors, frames, gussets and the like, so that possible sediment is set free and carried out of the ballast tank together with the water via the overflow pipe.
- the invention also relates to an arrangement for replacing water inside a ballast tank of a ship by surrounding water, available outside the ship, comprising a pump, of which a first side is connected to a first pipe ending outside the ship and of which a second side is connected to a second pipe, ending inside the ballast tank.
- a pump of which a first side is connected to a first pipe ending outside the ship and of which a second side is connected to a second pipe, ending inside the ballast tank.
- water flows via a vent duct out of the ballast tank.
- the inventive arrangement is characterised in that the arrangement also comprises an overflow pipe which runs at least partly inside the ballast tank and via which water coming from the ballast tank can be guided outside the ship.
- a favourable embodiment of the inventive arrangement is characterised in that the overflow pipe is provided with a first valve, which means that surrounding water cannot enter the ship on an unexpected moment.
- a further favourable embodiment of the inventive arrangement is characterised in that the overflow pipe exits the ship near a bottom side, which prevents the exit of the overflow pipe from freezing, which means that flushing will always be possible.
- a further favourable embodiment is according to another aspect of the invention characterised in that the arrangement moreover comprises a third pipe, connected to the second side of the pump and ending inside the ballast tank, which third pipe is provided with a number of discharge openings, via which surrounding water can be squirted into a direction of the bottom of the ballast tank, as a result of which a possible sediment present on the bottom will be set free and carried off.
- the discharge openings are provided with spray nozzles, with which a powerful current is obtained near floors, frames, gussets and the like, so that possible sediment is set free and carried out of the ballast tank together with the water via the overflow pipe.
- a further favourable embodiment is characterised in that the second and the third pipe are provided with a second, respectively a third valve. If only the second valve is opened, the ballast tank may be filled, emptied or flushed according to the known method. If only the third valve is opened, the ballast tank may be filled, emptied or flushed according to the inventive method, in the process of which moreover sediment and other pollution may be removed.
- Fig. 1 schematically shows a ship 1 in side view, provided with ballast tanks 2 built into a side wall of ship 1, according to the state of the art, which ballast tank 2 may be filled or emptied according to the state of the art with a pump 3, via a valve 4.
- ballast tank 2 On the top, ballast tank 2 is provided with a vent line 5, via which air may escape or flow in when pump 3 is operating.
- ballast tank 2 is filled with water in a harbour where cargo is loaded or unloaded.
- pump 3 is switched on and ballast tank 2 is filled from below with relatively clean surrounding water, in the process of which polluted water originating from the harbour drains away via vent line 5 and via a deck 6.
- Fig. 2 shows a possible embodiment of a ballast tank 2 according to the invention, where ballast tank 2 may be filled or emptied or flushed with a pump 3, via a valve 4 and a pipe 7.
- ballast tank 2 may be filled or emptied or flushed with a pump 3, via a valve 4 and a pipe 7.
- For flushing pump 3 is switched on, so that ballast tank 2 is filled from below with surrounding water and water present in ballast tank 2 will drain away via an overflow pipe 8 on the bottom of the ship.
- the discharge opening of pipe 7 ends near the bottom and is directed such that at the bottom of ballast tank 2 locally a turbulent current will form, which will set free sediment which will be carried along with the water flow via overflow pipe 8.
- a valve 9 is placed, which prevents water from entering ballast tank 2 via overflow pipe 8 when closed.
- Fig. 3 shows an alternative embodiment of a ballast tank 2 according to the invention, where ballast tank 2 may be filled or emptied or flushed with a pump 3, via a valve 4a and a pressure pipe 7a.
- pump 3 is switched on, so that ballast tank 2 is filled from below with surrounding water and water present in ballast tank 2 will drain away via an overflow pipe 8 at the bottom of the ship.
- Ballast tank 2 may also be flushed by opening valve 4b, after which surrounding water will enter ballast tank 2 via pipe 7b and via a number of discharge openings or spray nozzles 10.
- Discharge openings or spray nozzles 10 are directed such that they will set free any sediment, present on the bottom of ballast tank 2, after which it will be carried along and leave ballast tank 2 via overflow pipe 8.
- Fig. 4 schematically shows a possible arrangement of the discharge openings or spray nozzles 10 in ballast tank 2.
- Pipe 7b is installed for example ring-shaped and runs along the walls of ballast tank 2.
- the discharge openings or spray nozzles 10 are placed in such a way that they cause a highly turbulent current near bottom 11 of ballast tank 2.
- the inner structure of the ballast tank is taken into account, for example the location of floors 12, frames 13 and gussets 14
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Physical Water Treatments (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention relates to a method for flushing a ballast
tank (2) of a ship, in the process of which water present
in the ballast tank (2) is replaced by surrounding water,
present outside the ship. Water from the ballast tank (2)
is drained away on a bottom side of the ship via an
overflow pipe (8). Preferably, water flowing in is squirted
into the direction of the bottom of the ballast tank (2)
with the aid of a system of spray nozzles.
Description
- The invention relates to a method for flushing a ballast tank of a ship, in the process of which water in the ballast tank is replaced by surrounding water, available outside the ship. The water which is originally present in the ballast tank may be let in during loading and unloading in a harbour, which means that it may contain contaminants present in the harbour, for example chemical pollutants or polluting micro-organisms. If the water present in the ballast tanks is subsequently discharged in another harbour, then these micro-organisms will be introduced into another ecosystem, which may cause problems. For that reason, some harbour authorities demand that before one puts in on the harbour, all ballast tanks of the ship must be flushed, which means that the water present in the ballast tanks must be replaced by relatively clean surrounding water present for example 200 miles outside the coast. This method is not without any risk; after all the ballast tanks have been filled with some purpose and there is always a possibility that when the ballast tank is pumped out the stability of the ship is reduced or that the tensions in the hull become too high, especially when there is a substantial wave load. According to an improved method which obviates this disadvantage, the surrounding water is supplied to a bottom side of the ballast tank and the water originally present in the ballast tank is discharged via a vent duct placed on top of the ballast tank, across the deck and alongside the ship. Obviously, also this method is not without some risks as the deck may become very slippery, especially if one sails in a low temperature area. Moreover, the vent duct may freeze and block, in which case it will no longer be possible to flush the ballast tanks and there is even a danger that a ballast tank tears if one attempts flushing it.
- The method according to the invention does not have these drawbacks and is characterised in that water is guided outside the ship below the water surface via an overflow pipe which runs at least partly inside the ballast tank.
- A favourable realisation of the inventive method is characterised in that at least part of the surrounding water, flowing into the ballast tank is directed towards the bottom of the ballast tank via a system of discharge openings, preferably in such a direction that surrounding water flowing into the ballast tank will cause turbulence on the bottom, as a result of which sediment that may be present on the bottom will be set free and carried off.
- A further favourable realisation is characterised in that at least part of the surrounding water, flowing into the ballast tank is directed towards the bottom of the ballast tank via a system of spray nozzles. These spray nozzles, which are known as such, are designed such that the surrounding water will pour out in a well directed squirt. The squirts are preferably directed such that a powerful current is obtained near floors, frames, gussets and the like, so that possible sediment is set free and carried out of the ballast tank together with the water via the overflow pipe.
- The invention also relates to an arrangement for replacing water inside a ballast tank of a ship by surrounding water, available outside the ship, comprising a pump, of which a first side is connected to a first pipe ending outside the ship and of which a second side is connected to a second pipe, ending inside the ballast tank. According to the known arrangement, water flows via a vent duct out of the ballast tank. The inventive arrangement is characterised in that the arrangement also comprises an overflow pipe which runs at least partly inside the ballast tank and via which water coming from the ballast tank can be guided outside the ship.
- A favourable embodiment of the inventive arrangement is characterised in that the overflow pipe is provided with a first valve, which means that surrounding water cannot enter the ship on an unexpected moment.
- A further favourable embodiment of the inventive arrangement is characterised in that the overflow pipe exits the ship near a bottom side, which prevents the exit of the overflow pipe from freezing, which means that flushing will always be possible.
- A further favourable embodiment is according to another aspect of the invention characterised in that the arrangement moreover comprises a third pipe, connected to the second side of the pump and ending inside the ballast tank, which third pipe is provided with a number of discharge openings, via which surrounding water can be squirted into a direction of the bottom of the ballast tank, as a result of which a possible sediment present on the bottom will be set free and carried off. Preferably, the discharge openings are provided with spray nozzles, with which a powerful current is obtained near floors, frames, gussets and the like, so that possible sediment is set free and carried out of the ballast tank together with the water via the overflow pipe.
- A further favourable embodiment is characterised in that the second and the third pipe are provided with a second, respectively a third valve. If only the second valve is opened, the ballast tank may be filled, emptied or flushed according to the known method. If only the third valve is opened, the ballast tank may be filled, emptied or flushed according to the inventive method, in the process of which moreover sediment and other pollution may be removed.
- The invention will now be explained in more detail with a reference to the following figures, in which:
- Fig. 1
- schematically shows a ship provided with ballast tanks according to the state of the art in side view;
- Fig. 2
- shows a possible embodiment of a ballast tank according to the invention;
- Fig. 3
- shows an alternative embodiment of a ballast tank according to the invention;
- Fig. 4
- schematically shows a possible arrangement of the discharge openings or spray nozzles.
- Fig. 1 schematically shows a ship 1 in side view, provided with
ballast tanks 2 built into a side wall of ship 1, according to the state of the art, whichballast tank 2 may be filled or emptied according to the state of the art with apump 3, via avalve 4. On the top,ballast tank 2 is provided with avent line 5, via which air may escape or flow in whenpump 3 is operating. Usually,ballast tank 2 is filled with water in a harbour where cargo is loaded or unloaded. Before ship 1 puts in on a new port,pump 3 is switched on andballast tank 2 is filled from below with relatively clean surrounding water, in the process of which polluted water originating from the harbour drains away viavent line 5 and via a deck 6. - Fig. 2 shows a possible embodiment of a
ballast tank 2 according to the invention, whereballast tank 2 may be filled or emptied or flushed with apump 3, via avalve 4 and apipe 7. For flushingpump 3 is switched on, so thatballast tank 2 is filled from below with surrounding water and water present inballast tank 2 will drain away via anoverflow pipe 8 on the bottom of the ship. The discharge opening ofpipe 7 ends near the bottom and is directed such that at the bottom ofballast tank 2 locally a turbulent current will form, which will set free sediment which will be carried along with the water flow viaoverflow pipe 8. In overflow pipe 8 avalve 9 is placed, which prevents water from enteringballast tank 2 viaoverflow pipe 8 when closed. - Fig. 3 shows an alternative embodiment of a
ballast tank 2 according to the invention, whereballast tank 2 may be filled or emptied or flushed with apump 3, via avalve 4a and apressure pipe 7a. For flushing,pump 3 is switched on, so thatballast tank 2 is filled from below with surrounding water and water present inballast tank 2 will drain away via anoverflow pipe 8 at the bottom of the ship.Ballast tank 2 may also be flushed by openingvalve 4b, after which surrounding water will enterballast tank 2 viapipe 7b and via a number of discharge openings orspray nozzles 10. Discharge openings orspray nozzles 10 are directed such that they will set free any sediment, present on the bottom ofballast tank 2, after which it will be carried along and leaveballast tank 2 viaoverflow pipe 8. - Fig. 4 schematically shows a possible arrangement of the discharge openings or
spray nozzles 10 inballast tank 2. Pipe 7b is installed for example ring-shaped and runs along the walls ofballast tank 2. The discharge openings orspray nozzles 10 are placed in such a way that they cause a highly turbulent current nearbottom 11 ofballast tank 2. When placing and directing the discharge openings or spraynozzles 10, the inner structure of the ballast tank is taken into account, for example the location offloors 12,frames 13 andgussets 14
Claims (9)
- Method for flushing a ballast tank of a ship, in the process of which water in the ballast tank is replaced by surrounding water, available outside the ship, characterised in that water is guided outside the ship below the water surface via an overflow pipe which runs at least partly inside the ballast tank.
- Method according to claim 1, characterised in that at least part of the surrounding water, flowing into the ballast tank is directed towards the bottom of the ballast tank via a system of discharge openings.
- Method according to claim 1 or 2, characterised in that at least part of the surrounding water, flowing into the ballast tank is directed towards the bottom of the ballast tank via a system of spray nozzles.
- Arrangement for replacing water inside a ballast tank of a ship by surrounding water, available outside the ship, comprising a pump, of which a first side is connected to a first pipe ending outside the ship and of which a second side is connected to a second pipe, ending inside the ballast tank, characterised in that the arrangement also comprises an overflow pipe which runs at least partly inside the ballast tank and via which water coming from the ballast tank can be guided outside the ship.
- Arrangement according to one of the previous claims, characterised in that overflow pipe is provided with a first valve.
- Arrangement according to claim 4 or 5, characterised in that the overflow pipe exits the ship near a bottom side.
- Arrangement according to one of the claims 4 t/m 6, characterised in that the arrangement moreover comprises a third pipe, connected to the second side of the pump and ending inside the ballast tank, which third pipe is provided with a number of discharge openings, via which surrounding water can be squirted into a direction of the bottom of the ballast tank.
- Arrangement according to claim 7, characterised in that the discharge openings are provided with spray nozzles.
- Arrangement according to claim 7 or 8, characterised in that the second and the third pipe are provided with a second, respectively a third valve.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1025287 | 2004-01-20 | ||
NL1025287A NL1025287C1 (en) | 2004-01-20 | 2004-01-20 | Method and device for flushing ballast tanks. |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1557351A1 true EP1557351A1 (en) | 2005-07-27 |
Family
ID=34632208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05075102A Withdrawn EP1557351A1 (en) | 2004-01-20 | 2005-01-13 | Method and arrangement for flushing ballast tanks |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1557351A1 (en) |
NL (1) | NL1025287C1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014512995A (en) * | 2011-03-03 | 2014-05-29 | バワット エー/エス | System for treating ballast water in ballast tanks |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2357761A1 (en) * | 1976-03-12 | 1978-02-03 | Patents & Dev As | Ship ballast pumping system - has two way pump discharging ballast from ship either below or above water surface |
GB2044201A (en) * | 1979-03-14 | 1980-10-15 | Yamashita Shinnihon Steamship | Ballast pumping system |
US6053121A (en) * | 1997-07-08 | 2000-04-25 | Teekay Shipping Corporation | Method and apparatus for exchanging ballast water in a ship |
US6378451B1 (en) * | 2000-12-21 | 2002-04-30 | Union Oil Company California | Simplified ballast system for tension leg platforms |
WO2003095366A2 (en) * | 2002-04-09 | 2003-11-20 | Mh Systems, Inc. | Closed loop control of both pressure and content of ballast tank gases to at different times kill both aerobic and anaerobic organisms within ballast water |
-
2004
- 2004-01-20 NL NL1025287A patent/NL1025287C1/en not_active IP Right Cessation
-
2005
- 2005-01-13 EP EP05075102A patent/EP1557351A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2357761A1 (en) * | 1976-03-12 | 1978-02-03 | Patents & Dev As | Ship ballast pumping system - has two way pump discharging ballast from ship either below or above water surface |
GB2044201A (en) * | 1979-03-14 | 1980-10-15 | Yamashita Shinnihon Steamship | Ballast pumping system |
US6053121A (en) * | 1997-07-08 | 2000-04-25 | Teekay Shipping Corporation | Method and apparatus for exchanging ballast water in a ship |
US6378451B1 (en) * | 2000-12-21 | 2002-04-30 | Union Oil Company California | Simplified ballast system for tension leg platforms |
WO2003095366A2 (en) * | 2002-04-09 | 2003-11-20 | Mh Systems, Inc. | Closed loop control of both pressure and content of ballast tank gases to at different times kill both aerobic and anaerobic organisms within ballast water |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014512995A (en) * | 2011-03-03 | 2014-05-29 | バワット エー/エス | System for treating ballast water in ballast tanks |
Also Published As
Publication number | Publication date |
---|---|
NL1025287C1 (en) | 2005-07-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4388119B2 (en) | Ships equipped with an automatic ballast system using tubes | |
JP4536677B2 (en) | Structure of water ballast tank and water filling method in a ship. | |
EP0644844B1 (en) | Method for offshore loading of a tanker and construction of said tanker | |
FI123745B (en) | Apparatus and method for collecting material from watercourse | |
EP1557351A1 (en) | Method and arrangement for flushing ballast tanks | |
CN111469985A (en) | Ship anchor chain cleaning system and ship | |
ITTO951029A1 (en) | PLANT FOR THE TREATMENT OF WASTE WATER FROM VESSELS, BOATS, SHIPS AND FLOATS IN GENERAL AT THE DOCK MOORING | |
JP2007090933A (en) | Overflow method of vessel and device | |
US2908393A (en) | Oil separator raft | |
JP3480935B2 (en) | Drainage of oil and water from surfaces, especially tanker decks | |
US5699750A (en) | Self-bailing watersprite with positive buoyancy | |
KR101026183B1 (en) | Waste of ballast tank removing apparatus in a ship | |
KR101110836B1 (en) | Structure of ballast tank for elimination sediment from ballast tank | |
US8147687B2 (en) | Ballast water treatment apparatus | |
US4559888A (en) | Ship for transporting coal slurry | |
KR20000002091U (en) | Drilling Water Pollution System | |
FI62799B (en) | FOERFARANDE VID FARTYG AV S K FLOATER-TYP ELLER ANDRA LIKNANDEFARTYG FOER ATT FOERHINDRA ISFLAK ELLER ANDRA LIKNANDE FR AEMANDE KROPPAR ATT KOMMA IN I DOCKNINGSBASSAENGEN | |
JP2012245972A (en) | Restroom of ship | |
NL1014638C2 (en) | Installation for cleaning up oil slicks, comprises rotating brush located inside chamber with inlet channel leading to front of boat and exit channel leading to oil tank | |
JP3530133B2 (en) | Ballast replacement device | |
CN114351816A (en) | Air pressure emptying device and drainage system | |
KR100440740B1 (en) | Cross-type freeing port system for waters in open-top cargo ship | |
FI83298B (en) | Device and process for cleaning a tank intended for materials storage | |
JP4541116B2 (en) | Structure of water courses on ships | |
JP2002331991A (en) | Method of exchanging ballast water in cargo hold |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA HR LV MK YU |
|
AKX | Designation fees paid | ||
REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20060131 |