JP4303339B2 - Method and device for preventing rust and preventing attached organisms in ballast tank - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for preventing the adhesion of rust and attached organisms generated in a ballast tank when the ship's ballast tank is filled with seawater or the like to maintain the balance of the hull, and particularly does not cause pollution. The present invention relates to a method and an apparatus for easily and reliably preventing the occurrence of rust and the adhesion of attached organisms.
[0002]
[Prior art]
A ship's ballast tank is usually filled with a desired amount of water, especially seawater, in order to maintain the balance of the hull. When seawater is stretched in the ballast tank, not only rust is generated on the inner wall of the tank, but also attached organisms such as shellfish adhere to it, which not only reduces the circulation efficiency of seawater in the ballast tank. The ballast tank is corroded and the strength of the hull is lost, shortening the life of the ship.
[0003]
In order to prevent the occurrence of rust and attached organisms, conventionally, means for coating the inner wall of the ballast tank with a coating agent such as paint or epoxy tar has been taken.
[0004]
[Problems to be solved by the invention]
However, with this type of means, the coating is peeled off in a short period of time, pinholes are generated on the coated surface, etc., which cause corrosion, and thus must be repaired. For this reason, not only is the cost high, but there are places where it is difficult to repair, and complete repair is impossible.
[0005]
Furthermore, since the coating agent used for this coating usually has the effect of killing attached organisms, when ballast water that has come into contact with this coating agent is discharged into seawater, it has the disadvantage of adversely affecting marine organisms. Have.
[0006]
Therefore, the purpose of the present invention is to easily maintain the balance of the hull by placing seawater or other water on the ballast tank of the ship without causing pollution, causing rust and adhered organisms to adhere to the ballast tank. Another object of the present invention is to provide a method and an apparatus which can be surely prevented and which improve the above-mentioned drawbacks in the known art.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, according to the method of the present invention, when water is applied to a ballast tank of a ship and the balance of the hull is maintained, a submersible pump in which a water injection conduit is connected to a discharge port in the ballast tank. Is installed, and a cable coil that generates a variable electromagnetic field is wrapped around any part of the outer wall of the conduit, and the water stretched in the ballast tank is sprayed from the tip outlet of the conduit by the operation of the submersible pump. At this time, the variable electromagnetic field is pressurized to the flowing water passing through the conduit to aggregate the ions in the flowing water into fine particles, and the flowing water containing the fine particles of the ions is circulated in the ballast tank. To do.
[0008]
Furthermore, in order to achieve the above-mentioned object, according to the device of the present invention, a submersible pump installed in a ballast tank of a ship, a water injection conduit connected to a discharge port of the submersible pump, and an optional one of the conduits Cable coil that generates a variable electromagnetic field wound around the location of the tube, pressurizes the variable electromagnetic field to the flowing water passing through the conduit to agglomerate the ions in the flowing water into fine particles, The contained running water is circulated in the ballast tank by the operation of the submersible pump.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
[0010]
FIG. 1 is a plan view of a ship having a ballast tank equipped with the apparatus of the present invention, FIG. 2 is a perspective view of the ballast tank equipped with the apparatus of the present invention, and FIG. 3 is a submersible pump installed in the ballast tank. It is a perspective view of one specific example.
[0011]
In FIG. 1, reference numeral 1 denotes a ship. Usually, a plurality of ballast tanks 2, 2,... 2 are installed in parallel in a row on the bottom of the ship. Keeps the balance. However, rust is generated on the inner walls of the ballast tanks 2, 2, 2, and attached organisms such as shellfish are generated.
[0012]
Therefore, in the present invention, as shown in FIG. 1 and FIG. 2, the submersible pump 4 is installed on an arbitrary portion of the ballast tanks 2, 2,. 1 to 3, particularly FIG. 3, this submersible pump 4 has a suction port 5 at the bottom and a discharge port 6 at the top, and a water injection conduit 7 is connected to the discharge port 6. Yes.
[0013]
Further, a cable coil 9 generating a variable electromagnetic field is wound around the outer wall 8 of the conduit 7 at an arbitrary position. This cable coil 9 generates a variable electromagnetic field with a power supply of 100 V or 200 V from an electromagnetic generator (not shown). As a combination of the electromagnetic generation converter and the cable coil 11, specifically, a “scale watcher” sold by SK Corporation is used.
[0014]
When a variable electromagnetic field is generated from the cable coil 9, the variable electromagnetic field pressurizes the flowing water passing through the conduit 7 and aggregates ions in the flowing water into fine particles. That is, the flowing water passing through the arbitrary conduit 7 of the cable coil 9 is flowing water containing fine particles of ions.
[0015]
When the submersible pump 4 is operated in this state, the seawater 10 stretched in the ballast tank 2 is sucked into the submersible pump 4 from the suction port 5, injected from the discharge port 6 through the conduit 7 and from the tip injection port 11, Circulates in the ballast tank 2 in the direction of the arrow. At this time, the flowing water passing through the conduit 7 is pressurized by the variable electromagnetic field from the cable coil 9, and as a result, the ions in the flowing water are aggregated into fine particles, and the flowing water containing the fine particles of ions becomes the ballast tank 2. Will circulate inside.
[0016]
That is, the device of the present invention is wound around a submersible pump 4 installed in a ballast tank 2 of a ship 1, a water injection conduit 7 connected to a discharge port 6 of the submersible pump 4, and an arbitrary portion of the conduit 7. A cable coil 9 which generates a variable electromagnetic field, pressurizes the variable electromagnetic field to the flowing water passing through the conduit 7 to agglomerate ions in the flowing water into fine particles, and the flowing water containing the fine particles of the ions Is circulated in the ballast tank 2 by the operation of the submersible pump.
[0017]
This running water flows along the inner wall of the ballast tank 2, and the action of fine particles of ions in the running water prevents the generation of rust and the attachment of attached organisms at the same time.
[0018]
For example, when there is iron rust in the ballast tank 2 and this iron rust grows by iron bacteria, the scale generation mechanism is as follows.
[0019]
[Chemical 1]
Fe ⁺⁺ + 2OH ⁻ → Fe (OH) ₂ (Ferrous hydroxide)
[0020]
[Chemical formula 2]
2Fe (OH) ₂ + H ₂ O + 1/2 O ₂ → 2Fe (OH) ₃ (ferric hydroxide)
[0021]
[Chemical 3]
2Fe (OH) ₃ → Fe ₂ O ₃ + 3H ₂ O (diiron trioxide)
[0022]
This ferric trioxide is usually called red rust and is rust accompanied by growth. When this comes into contact with flowing water containing fine particles of ions, it turns into black rust as shown in the following chemical formula.
[0023]
[Formula 4]
_{3Fe 2 O 3 · n H 2} O + e - → 2Fe 3 O 4 +1/2 O 2 +3 n H 2 O
(Triiron tetraoxide)
[0024]
That is, ferric trioxide (red rust) undergoes a reduction action due to the fine particles of ions and gradually changes to brown, and eventually changes to triiron tetroxide and black rust. This black rust is also called magnetite, which not only prevents rust growth but also serves as a paint film. Furthermore, this black rust will eventually be washed away as a collection of sludge-like particles.
[0025]
Furthermore, the flowing water containing fine particles of these ions penetrates into the inside of the scale, softens the already deposited scale, eventually peels off, drops off and flushes away by the flow velocity, and expels attached organisms by this reducing action, This adhesion is prevented.
[0026]
【The invention's effect】
As described above, the present invention connects a conduit wound with a cable coil at an arbitrary position to the discharge port of the submersible pump, and when the submersible pump is operated in this conduit, the seawater in the ballast tank is passed through and circulated. At the same time, a variable electromagnetic field is generated from the cable coil to agglomerate ions in the fluid into fine particles, and by contacting the fluid containing the fine particles of these ions with the inner wall of the ballast tank, water such as seawater is not contaminated. That is, even if this water is thrown into the sea, the occurrence of rust in the ballast tank can be prevented easily and surely without causing pollution, and adhesion of attached organisms is also prevented.
[Brief description of the drawings]
FIG. 1 is a plan view of a ship having a ballast tank equipped with the device of the present invention.
FIG. 2 is a perspective view of a ballast tank provided with the device of the present invention.
FIG. 3 is a perspective view of a specific example of a submersible pump installed in a ballast tank.
[Explanation of symbols]
1 Ship 2 Ballast Tank 4 Submersible Pump 6 Discharge Port 7 Conduit 8 Outer Wall 9 Cable Coil
10 water
11 Tip injection port

Claims (1)

  In order to maintain the balance of the hull by filling the ship's ballast tank with water, a submersible pump with a water injection conduit connected to the discharge port is installed in the ballast tank, and a variable electromagnetic field is installed at any location on the outer wall of the conduit. A cable coil is generated, and the water stretched in the ballast tank is circulated in the ballast tank by injecting water from the tip outlet of the conduit by the operation of the submersible pump. A method for preventing rusting and adhering organisms in a ballast tank, comprising pressurizing the boundary to agglomerate ions in flowing water into fine particles and circulating the flowing water containing the fine particles of ions in the ballast tank.

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