KR-102963301-B1 - CLEANING APPARATUS FOR SEA CHEST GRID OF SHIP AND CLEANING MEHTHOD FOR SEA CHEST GRID USING THE SAME

Abstract

The present invention relates to a device for cleaning a sea chest of a ship equipped with an air lubrication system (ALS), comprising: a sea chest grid installed on the seawater inlet side of the sea chest to prevent foreign substances contained in the seawater from entering the interior of the sea chest when seawater is introduced; a seawater pipe for supplying seawater introduced into the sea chest to a cooling or ballast water system of various equipment provided on the ship; and an air injection nozzle mounted on the seawater pipe for injecting compressed air into the sea chest and the sea chest grid.

Inventors

• 장창호

Assignees

• 한화오션 주식회사

Dates

Publication Date

20260511

Application Date

20201013

Claims (8)

1. As a device for cleaning the sea chest of a vessel equipped with an air lubrication system (ALS), A sea chest grid installed on the seawater inlet side of the above sea chest to prevent foreign substances contained in the seawater from entering the interior of the above sea chest when seawater flows in; Seawater flowing into the above sea chest is supplied to the cooling or ballast water system of various equipment provided on the vessel, and seawater piping branched to the above air lubrication system (ALS); and It includes an air injection nozzle mounted on the above seawater pipe for injecting compressed air into the above sea chest and the above sea chest grid, A ship's sea chest grid cleaning device that further includes a shut-off valve installed in the seawater piping to open and close the air injection nozzle, thereby preventing the inflow of seawater into the air lubrication system (ALS).
2. In Article 1, The above air lubrication system includes a compressor that sprays compressed air onto the surface of the bottom of the vessel to reduce frictional resistance of the vessel during operation of the vessel, and A ship's sea chest grid cleaning device in which the above compressor is connected to the air injection nozzle to supply compressed air into the sea chest.
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4. In Article 1, The above air injection nozzles are provided in multiple numbers, and Each of the above air injection nozzles is a ship's sea chest grid cleaning device having at least two diameters.
5. In Paragraph 4, A ship's sea chest grid cleaning device in which each of the plurality of air injection nozzles is individually controlled through the control unit of the air lubrication system.
6. A method for cleaning a sea chest grid using a sea chest grid cleaning device of a vessel according to Article 1, A method for cleaning the sea chest grid of a ship by supplying compressed air to the air injection nozzle through the compressor of the air lubrication system when the ship is berthed in a port or operating at low speed.
7. In Paragraph 6, A method for cleaning a ship's sea chest grid, wherein the above-mentioned air injection nozzles are provided in multiple numbers having various diameters and are individually controlled through a control unit of an air lubrication system.
8. In Article 7, Among the plurality of the above air injection nozzles, the air injection nozzle with a relatively small diameter injects high-pressure compressed air in a single burst into the interior of the sea chest and onto the sea chest grid, and A method for cleaning a ship's sea chest grid, wherein a plurality of air injection nozzles, the air injection nozzle with a larger diameter, is controlled to continuously inject air into the sea chest to circulate seawater within the sea chest.

Description

Cleaning apparatus for sea chest grid of ship and cleaning method for sea chest grid using the same The present invention relates to a cleaning device for a ship's sea chest grid, and more specifically, to a cleaning device for a ship's sea chest grid that can increase the management efficiency of the sea chest and sea chest grid by utilizing a compressor of an Air Lubrication System (ALS), and a method for cleaning a sea chest grid using the same. Generally, a ship is equipped with a ship power and electrical system consisting of a main engine that generates thrust, a generator engine that produces the electricity required by the ship, and the ship's accommodations and various heating and cooling devices. The aforementioned ship engines and various equipment can generate a large amount of heat. While some of this heat is reused by a waste heat recovery system, most of it is ultimately cooled through a cooling system and released into the surrounding sea. Ships use fresh water to cool the heat generated by various facilities and devices equipped on the vessel, and practically use seawater for cooling with that fresh water. Accordingly, the ship is equipped with a sea chest to introduce seawater required for cooling the engine and various equipment, and the seawater introduced into the sea chest can be supplied not only for cooling the engine or various equipment but also for ballasting operations of the ship using a pump, etc. Here, the sea chest forms a space for introducing seawater used as cooling water and ballast water for the ship's engine and various equipment, and a grid-shaped sea chest grid is installed on the seawater inlet side to prevent foreign substances contained in the seawater from entering the sea chest during the process of seawater entering the sea chest. If seawater, marine organisms, or foreign substances enter the interior of the Sea Chest or attach to or proliferate on the Sea Chest grid during the process of introducing seawater, the flow of seawater into the Sea Chest may be interrupted or the flow velocity may be reduced; if the flow of seawater is interrupted, it may cause serious damage to engines and various other equipment requiring cooling. To resolve this, periodic maintenance and cleaning of the sea chest and sea chest grid are required; however, since the sea chest is always submerged below the waterline, it is difficult to remove foreign matter and clean the interior of the sea chest and the sea chest grid. Conventionally, sea chest cleaning operations are carried out directly by divers or extensive cleaning operations are performed from the outside of the hull using remotely operated vehicles (ROVs). However, this is not only inefficient due to the manpower required for sea chest management and the operation of ROVs, but also poses a risk of various safety accidents, so improvements are required. The aforementioned technical configuration is provided as background technology to aid in understanding the present invention and does not constitute prior art widely known in the technical field to which the present invention belongs. Figure 1 is a conceptual diagram of an air lubrication system for reducing frictional resistance of a ship during operation. Figure 2 is a diagram illustrating the injection of compressed air into the ship's sea chest using the compressor of Figure 1 when the air lubrication system is not operating. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the present invention, such detailed description is omitted. Additionally, while preferred embodiments of the present invention will be described below, the technical concept of the present invention is not limited or restricted thereto and can be modified and implemented in various ways by those skilled in the art. Figure 1 is a conceptual diagram of an air lubrication system for reducing frictional resistance of a ship during operation, and Figure 2 is a diagram explaining the injection of compressed air into the ship's sea chest using the compressor of Figure 1 when the air lubrication system is not operating. Ships operating at sea encounter various forms of resistance during operation. Among these, the hull, submerged underwater as the ship moves, experiences frictional resistance due to the seawater. Referring to FIG. 1, an air lubrication system (ALS) is applied to the ship to reduce frictional resistance during sea navigation. The air lubrication system (ALS) can reduce friction caused by contact with seawater by spraying air (more pr