Apparatus for automatically managing ballast water of ship, and operation method thereof

Abstract

The present invention relates to an apparatus for automatically managing the ballast water of a dual-hulled ship and, more specifically, to an apparatus for automatically managing the ballast water of a ship, the apparatus dividing the structure of an integrated ballast water tank into ballast water tanks of a multi-layered structure, and filling each ballast water tank with seawater, so as to perform the original function thereof of maintaining the water-line by means of the ballast water, and having a structure and a device so as to utilize the seawater, used as cooling water, residential water, water for miscellaneous use, and the like, as the seawater of the ballast water tanks, thereby integrally managing the usage of the seawater of the ship, and continuously and successively changing the seawater of the ballast water tanks while the ship is sailing.

Description

TECHNICAL FIELD[0001]The present invention relates to an apparatus for automatically managing the ballast water of a dual-hulled ship and, more specifically, to an apparatus for automatically managing the ballast water of a ship, the apparatus dividing the structure of an integrated ballast water tank into ballast water tanks of a multi-layered structure, and filling each ballast water tank with seawater, so as to perform the original function thereof of maintaining the water-line by means of the ballast water, and having a structure and a device so as to utilize the seawater, used as cooling water, residential water, water for miscellaneous use, and the like, as the seawater of the ballast water tanks, thereby integrally managing the usage of the seawater of the ship, and continuously and successively changing the seawater of the ballast water tanks while the ship is sailing.RELATED ART[0002]Since 1993, the shipbuilding industry has been booming in Korea as a requirement for the do...

AI Technical Summary

Benefits of technology

[0048]As described above, the present invention relates to a ballast water management apparatus for a ship of double hull structure, and more particularly, to a ballast water management apparatus when a cargo ship of double hull structure is sailed with an empty storage state without loading cargo. The present invention manages and controls an automatic regulating device so that the ballast water is continuously and sequentially exchanged by using seawater stored in a plurality of multi-layered ballast tanks as cooling water and man-made water. In this way, it is possible to integrate the dualized method for using seawater within the ship, and to electronically and automatically manage and control the ballast water.

[0049]In addition, all of the seawater, that is inflowed waters at first, is discharged during ship sailing. Accordingly, seawater having the same conditions as those of the sea in the port of entry shall be discharged to the port of entry. As a result, there is an effect of preventing the ecosystem disturbance caused by the transport-prohibited life species in the ballast water.

[0050]Also, compared with that the conventional method in which the energy used for storing and discharging the ballast water corresponds to the net profit of the ship that is 3 to 5% of the fuel used by the ship, the present invention can replace a part of the energy for ballast water inflow and discharge with the energy for cooling water and other water, which has the effect of increasing the profit of the ship through energy saving.

[0051]Also, the ballast water is constantly exchanged during ship's sailing. It therefore provides the effect of satisfying the requirement that ballast water should be exchanged at a point 200 meters or more from the coast and at a depth of 500 meters or more. As a result, the ship can enter the port without being anchored in the outer port, thus increasing the number of ship sailings.

[0052]Further, since the present invention has ballast tanks having a multi-layered watertight bulkhead structure, the stability of the ship is improved, and as a result, the possibility of sinking due to damage to the ship can be minimized and the ship insurance cost can be reduced.

Problems solved by technology

Because of this, there is a risk of oil spillage from the ship and the insurance premium of the ship is high.

A ship such as a cargo ship cannot be navigated because the center of gravity of the ship is so high that the propeller is not submerged under water when the cargo is not loaded, and there is a high risk that it can be easily overturned by sea waves.

The isolation method is used when the ballast water is so polluted that it is difficult or impossible to purify.

The worldwide harbors are suffering by not only disturbance of the marine ecosystem but also propagation of pathogens, caused by the fact that more than 13 billion tons of ballast water are transported each year and about 7,000 kinds of forbidden marine living organisms are transported across ocean every day between harbors.

For example, the ecosystem disturbance that occurred near Chesapeake Bay in the US seriously damaged the sturgeon shark farm around the bay, causing a damage recovery cost of over US $1 billion per year.

It also adversely affected inside the Great Lakes, causing a serious ecosystem disturbance such as the extinction of some native species in the Great Lakes.

As described above, the conventionally used ballast water management system BWMS of the ship causes disturbance of the global marine ecosystem due to the transportation of prohibited life species.

The energy consumption for ballast water exchange is 3 to 5% of the annual consumption of the ship, which is very costly.

The installation and maintenance cost of the processing apparatus for treating the active substances is high.

There is a danger that the ship sinks during the ballast water exchange and there is a large economic loss such as a decrease in the number of times of sailings due to the time spent on the open sea for the ballast water exchange.

In addition, due to the structure of the ballast water tank, the structure of the ship is twisted.

In order to prevent this problem, the structure of the ballast water tank is strengthened by steel structure, which increases the installation amount of the steel structural member, and this increases the weight of the ship hull structure.

For these and other reasons, there were structural and mechanical problems in ship structure.

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