JPH1159582A - Hull cleaning method - Google Patents

Abstract

[PROBLEMS] To kill marine microorganisms attached to the outer surface of a hull without using paint mixed with tin. SOLUTION: Ozone 6 is added to seawater 3 flowing very close to a hull 1 to kill marine microorganisms attached to the outer surface of the hull 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of cleaning a hull in which marine microorganisms attached to the outer surface of a hull are killed by ozone, ozone water or diluted ozone gas, thereby preventing the outer surface of the hull from being soiled. It is.

[0002]

2. Description of the Related Art A paint is applied to the outer surface of a hull to prevent corrosion of the hull due to seawater or the like and adherence of algae and shellfish. Such paints include algae and shellfish on the outer surface of the hull. To prevent adhesion, toxic tin or cuprous oxide is used.

[0003]

However, the toxicity of tin, from the point of view of pollution prevention, is to pollute the entire marine environment or affect the living organisms in seawater.
In recent years, the application of paint containing tin to the surface of a hull has been prohibited in Japan, and is likely to be prohibited overseas as well. In addition, the self-polishing antifouling paint currently used with cuprous oxide does not provide a sufficient effect as much as tin-containing antifouling paint, and the self-polishing antifouling paint needs to be re-applied regularly. There is.

The present invention has been made in view of the above circumstances, and has as its object to kill marine microorganisms attached to the surface of a hull without using paint containing tin or cuprous oxide.

[0005]

A hull cleaning method according to the present invention is characterized in that ozone, ozone water mixed with ozone and water, or diluted ozone gas obtained by diluting ozone with air is added to seawater very close to the hull, and the hull is cleaned. It kills marine microorganisms attached to the surface.

Since ozone is finally decomposed into oxygen, it prevents marine microorganisms from adhering to the hull without causing pollution such as polluting the sea, and prevents the occurrence of fouling on the outer surface of the hull. can do.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an example of an embodiment of the present invention, in which 1 is a hull.

A conventionally known ozone generator 2 is provided in a hull 1.
The surface of the hull 1 that comes into contact with the seawater 3 and the surface that may come into contact with the hull 1 are provided with a plurality of nozzles 4 such that the tip of the inlet substantially matches the outer surface of the hull 1.
Are provided at a required pitch.

The ozone generator 2 and each nozzle 4 are connected to a pipe 5
The ozone 6 supplied from the ozone generator 2 through the pipe line 5 can be injected from the nozzle 4 into the seawater 3 flowing in a very close part of the hull 1.

In FIG. 1, reference numeral 7 denotes a traveling direction of the hull 1, and reference numeral 8 denotes a flow direction of seawater 3 with respect to the hull 1 traveling in the traveling direction 7.

Next, the operation of the embodiment of the present invention will be described.

During the navigation of the hull 1, ozone 6 produced by the ozone generator 2 is supplied to each nozzle 4 through a pipe 5, and the seawater flowing through a very close portion of the hull 1 from the tip inlet of the nozzle 4. 3 injected.

When the ozone 6 comes into contact with the outer surface of the hull 1 due to its strong sterilizing power, the ozone 6 kills marine microorganisms attached to the outer surface of the hull 1, thereby preventing the hull 1 from being soiled. can do.

FIG. 2 shows another embodiment of the present invention, in which ozone water 13 can be injected into seawater 3.

In the figure, reference numeral 9 denotes a water tank provided in the hull 1, and water 10 stored in the water tank 9 is supplied to a pump 11.
Supply to the pipe 5 via the pipe 12 and ozone water 13
Can be manufactured.

In the figure, the same components as those shown in FIG. 1 are denoted by the same reference numerals.

When the hull 1 is navigating, the ozone 6 produced by the ozone generator 2 is sent out to the pipeline 5 and
The water 10 in the inside is supplied from the pipe 12 to the pipe 5 by the pump 11, and the ozone 6 is mixed with the water 10 in the pipe 5 to produce ozone water 13.

The ozone water 13 produced in the pipe 5 is
From the nozzle 4 to the nozzle 4
It is injected into seawater 3 flowing very close to the hull 1.

Therefore, also in this embodiment, the marine microorganisms attached to the hull 1 are killed by the strong sterilizing power of the ozone 6 in the ozone water 13, so that the hull 1 can be prevented from being soiled.

FIG. 3 shows still another embodiment of the present invention, in which a diluted ozone gas 18 can be injected into seawater 3.

In the figure, reference numeral 14 denotes a compressed air tank provided in the hull 1, and a compressed air tank 1 from the compressed air tank 14.
5 is supplied to the pipe 5 via a pipe 17 having a control valve 16 and mixed with ozone 6 to produce a diluted ozone gas 18.

In the drawings, the same components as those shown in FIGS. 1 and 2 are denoted by the same reference numerals.

When the hull 1 is navigating, the ozone 6 produced by the ozone generator 2 is sent to the pipe 5, and the compressed air 15 from the compressed air tank 14 is sent to the pipe 5 through the pipe 17. Thus, the ozone 6 is mixed with the compressed air 15 in the pipeline 5 to produce the diluted ozone gas 18.

The diluted ozone gas 18 produced in the pipe 5 is supplied from the pipe 5 to the nozzle 4, and is injected into the seawater 3 flowing very close to the hull 1 from the inlet of the nozzle 4.

Therefore, also in the present embodiment, the marine microorganisms attached to the hull are killed by the strong sterilizing power of the ozone 6 in the diluted ozone gas 18, so that the hull 1 can be prevented from being soiled.

In each of the above embodiments, the ozone 6 is finally decomposed into oxygen, so that it is environmentally friendly and does not cause pollution.

Further, the marine microorganisms can be prevented from adhering to the hull 1 without polluting the sea, and the marine microorganisms that have already adhered can be washed away.

Furthermore, since marine microorganisms do not adhere to the outer surface of the hull 1, maintenance of the hull surface can be reduced.
However, self-polishing paints, which are current antifouling paints, need to be periodically re-applied.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the scope of the present invention.

[0031]

According to the hull cleaning method of the present invention, it is possible to prevent marine microorganisms from adhering to the hull without causing pollution such as polluting the sea and to prevent the outer surface of the hull from being stained. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a side view for explaining an example of an embodiment of a hull cleaning method of the present invention.

FIG. 2 is a side view for explaining another example of the embodiment of the hull cleaning method of the present invention.

FIG. 3 is a side view for explaining still another example of the embodiment of the hull cleaning method of the present invention.

[Explanation of symbols]

 Reference Signs List 1 hull 3 seawater 6 ozone 10 water 13 ozone water 15 compressed air 18 diluted ozone gas

Claims (1)

[Claims] An object of the present invention is to add ozone, ozone water mixed with ozone and water, or diluted ozone gas obtained by diluting ozone with air to seawater in the immediate vicinity of a hull to kill marine microorganisms attached to the outer surface of the hull. Characteristic hull cleaning method.