KR101465718B1 - Ballast water supply system and ballast water supply method - Google Patents

Abstract

A ballast water supply system is disclosed. A system for supplying ballast water by filtering seawater to a ballast tank partitioned by a plurality of sidewalls of a hull, the system comprising: a first supply line for supplying seawater from a septic tank to a selected one of a plurality of ballast tanks; A discharge line to which one end is connected to the upper end of the water ballast tank for discharging seawater; A filter unit connected to the discharge line and filtering the seawater flowing through the discharge line; And a first transfer line for transferring the filtered seawater from the filter section to the remaining ballast tanks of the hull.

Description

Technical Field [0001] The present invention relates to a ballast water supply system and a ballast water supply method,

The present invention relates to a ballast water supply system and a ballast water supply method. And more particularly, to a ballast water supply system and a ballast water supply method for removing suspended solids in sea water and supplying the same to a ballast tank.

In general, ships are equipped with multiple ballast tanks. The ballast tank maintains the draft at a constant level and performs various functions such as balancing the load when the load is unbalanced so that the ship does not lose stability.

Ballast tanks are filled with ballast water. In general, ballast water is readily available in sea water. In other words, the seawater is introduced into the ballast tank to fill the ballast tank, thereby maintaining or balancing the draft of the ship.

However, in general, seawater contains a large amount of floating matters such as soil and foreign matter, and if the process of inflow and outflow of seawater into the ballast tank is continuously repeated, the float may deposit and accumulate inside the ballast tank. As such, the sediment and accumulated floats in the ballast tank increase the overall weight of the ship, reduce the speed of the ship, and cause various problems such as internal corrosion of the ballast tanks.

Accordingly, in the ballast water supply system according to the prior art, a filter is installed in an inflow passage through which seawater flows into the ship. However, since such a filter is a device for filtering very fine suspended matters such as microorganisms, clogging occurs frequently due to floating of suspended matters of various sizes, and the filter efficiency is reduced.

The embodiment of the present invention can provide a ballast water supply system and a ballast water supply method that can previously remove floating matters in seawater before the seawater supplied to the ballast tank passes through the filter.

The embodiments of the present invention can provide a ballast water supply system and a ballast water supply method that can remove floats of various sizes mixed with seawater by using sedimentation action.

The embodiments of the present invention can provide a ballast water supply system and a ballast water supply method that can effectively filter seawater without hindering the space utilization of the ship by using the existing ship structure.

According to an aspect of the present invention, there is provided a system for supplying ballast water by filtering seawater into a ballast tank partitioned by a plurality of sidewalls of a hull, the seawater supplying seawater to a selected one of the plurality of ballast tanks A first supply line for supplying a first voltage; A discharge line connected to an upper end of the water ballast tank for discharging the seawater; A filter unit connected to the discharge line and filtering the seawater flowing through the discharge line; And a first transfer line for transferring the seawater filtered by the filter unit to the remaining ballast tank of the hull.

The ballast tank may further include a perforated plate disposed in an inner space of the water purification ballast tank so as to face the inflow direction of the seawater flowing in the first supply line.

And a flow control plate disposed opposite the perforated plate of the water purification ballast tank.

And a swash plate disposed to face the perforated plate of the water purification ballast tank.

A sediment discharge line connected to one end of the bottom surface of the water ballast tank for discharging sediment to the outside; And a spray nozzle installed from the bottom surface of the water purification ballast tank toward the sediment discharge line.

And a second supply line for supplying the seawater to the filter unit in the seed chest, and the other end of the discharge line may be connected to the second supply line.

And a second conveyance line branched from the first conveyance line for conveying the seawater filtered by the filter section to the water ballast tank for purification.

According to another aspect of the present invention, there is provided a method for supplying ballast water by filtering seawater into a ballast tank partitioned by a plurality of sidewalls of a ship, the seawater supplying seawater to a selected one of the plurality of ballast tanks ; A separation step of separating the suspended matter and the seawater by depositing suspended matters mixed with the seawater introduced into the water purification ballast tank; A discharge step of discharging seawater at an upper end of the water ballast tank for purification; A filtering step of filtering the discharged seawater; And a transfer step of transferring the filtered seawater to the remaining ballast tanks.

According to the embodiment of the present invention, the filter efficiency is improved by filtering suspended matters of various sizes mixed in seawater before the seawater flows into the filter.

According to the embodiment of the present invention, by using the sedimentation action, it is possible to remove a large amount of suspension of various sizes.

Further, by using the existing ship structure, there is an effect that the seawater can be effectively filtered without hindering the space utilization of the ship.

1 is a schematic view of a ballast water supply system according to an embodiment of the present invention;
2 is a sectional view of a water purification ballast tank according to an embodiment of the present invention;
3 is a flowchart showing a ballast water supply method according to an embodiment of the present invention;

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, embodiments of a ballast water supply system and a ballast water supply method according to the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same or corresponding components are denoted by the same reference numerals And redundant explanations thereof will be omitted.

FIG. 1 is a schematic view of a ballast water supply system according to an embodiment of the present invention, and FIG. 2 is a sectional view of a water purification ballast tank according to an embodiment of the present invention.

1 and 2 show a hull 44, a sea chest 10, a first supply line 12, a water purification ballast tank 14, a discharge line 16, a pump 18, A first conveyance line 22, a ballast tank 24, a second supply line 26 and a second conveyance line 28 are shown, The zone 32, the perforated plate 34, the flow control plate 36, the swash plate 38, the sediment discharge line 40, and the spray nozzle 42 are shown.

1 and 2, a ballast water supply system according to the present embodiment includes a first chest 10 for supplying seawater to a selected water ballast tank 14 among a plurality of ballast tanks 24, 14, A discharge line 16 connected at one end to the upper end of the water ballast tank 14 for discharging seawater, a filter unit 16 connected to the discharge line 16 for filtering the seawater flowing through the discharge line, 20), and a first transfer line (22) for transferring the filtered seawater from the filter section (20) to the remaining ballast tanks (24) of the hull, wherein the seawater supplied to the ballast tanks The float can be separated in advance.

The sidewall of the ship hull 44 is divided into a plurality of ballast tanks 14 and 24 and the ballast tanks 14 and 24 are filled with seawater to adjust the draft of the ship, The ballast tanks 14 and 24 are selectively filled with seawater to balance the ship.

The sea chest 10 is provided at the bottom or side surface of the hull 44 as an access facility for seawater. The sea water introduced into the seed chest 10 is supplied to the water purification ballast tank 14 through the first supply line 12.

The first supply line (12) supplies seawater filled in the seed chest (10) to a selected water ballast tank (14) of a plurality of ballast tanks. A strainer (not shown) may be installed in the first supply line 12. The strainer is a filtering apparatus in the form of a wire mesh barrel, and it is possible to filter the suspended matter of large particles in advance before the seawater is supplied to the water purification ballast tank 14.

The water purification ballast tank 14 can be selected from among a plurality of ballast tanks and can be used as a space for separating floating matters in seawater before the seawater is supplied to the remaining ballast tanks 24. As the water ballast tank 14, a ballast tank closest to the seed chest 10 may be used. For example, a ballast tank adjacent to the engine room may be used.

While the seawater flowing into the water purification ballast tank 14 through the first supply line 12 remains in the water purification ballast tank 14, the suspended matter in the seawater is settled on the bottom of the water purification ballast tank 14.

One end of the discharge line 16 is connected to the upper end of the water purification ballast tank 14, and the seawater is discharged. The seawater introduced into the water purification ballast tank 14 through the first supply line 12 is allowed to settle in the bottom of the water purification ballast tank 14 while staying in the water purification ballast tank 14, 14), there is seawater from which suspended matters are removed. Therefore, the seawater from which the floating matter is removed from the upper end of the water purification ballast tank 14 through the discharge line 16 flows out of the water purification ballast tank 14.

The filter unit 20 is connected to the discharge line 16 and filters the seawater flowing out through the discharge line 16. The seawater flowing into the seed chest 10 is first filtered by the strainer through the strainer and then supplied to the water ballast tank 14 through the first supply line 12. The seawater flowing into the water ballast tank 14 The floating water in the water ballast tank 14 is settled at the bottom of the water purification ballast tank 14 by the sedimentation action and the seawater having the floating water removed at the top of the water purification ballast tank 14 is discharged through the discharge line 16 And the filter unit 20 filters the seawater again and is supplied to the remaining ballast tanks 24 through the first transfer line 22. [

A pump 18 may be provided at the front end of the filter unit 20 and the pump 18 may control the flow rate of seawater transferred from the seed chest 10. The filter unit 20 is capable of filtering micrometer-unit substances and filtering microorganisms contained in seawater. The first transfer line 22 is connected to the filter unit 20 and the ballast tanks 24 so that the filtered seawater is transferred to the respective ballast tanks 24 through the above process.

On the other hand, in order to increase the sedimentation speed of suspended solids contained in the seawater in the water ballast tank 14, the inner space of the water ballast tank 14 is provided with a perforated plate (34) can be installed. The inner space of the water ballast tank 14 can be partitioned into a first zone 30 and a second zone 32 with the perforated plate 34 being in the center and the first supply line 12 is divided into a first zone 30 And the discharge line 16 may be connected to the upper end of the water purification ballast tank 14 of the second zone 32.

Thereby, the first supply line 12 connected to the first zone 30 causes the seawater to flow from the first zone 30 to the second zone 32 and flows through the first supply line 12 The seawater flowing into the first zone (30) moves to the second zone (32) while passing through the perforated plate (34). The seawater flowing at a constant flow rate passes through the perforated plate (34) and the flow velocity is reduced, so that the sediment of the suspended matters contained in the seawater can be made effective.

The discharge line 16 is connected to the upper end of the water purification ballast tank 14 in the second zone 32 and passes through the perforated plate 34 to transfer the seawater having the suspended matter to the filter unit 20.

A flow control plate 36 for controlling the flow of the seawater having passed through the perforated plate 34 is provided in the second zone 32 of the water ballast tank 14 in addition to the perforated plate 34, (38) can be installed.

In this embodiment, the flow control plate 36 and the swash plate 38 are arranged together.

The flow control plate (36) is installed opposite the perforated plate (34) in the second zone (32). Here, the lower end of the flow control plate 36 is spaced from the bottom surface of the water purification ballast tank 14, and a passage through which the seawater flows is formed below the flow control plate 36.

The flow control plate 36 induces the seawater passing through the perforated plate 34 to flow to the lower side of the flow control plate 36. When the seawater flows to the lower side of the flow control plate 36, The sediment is deposited on the bottom surface of the tank 14, and the seawater having passed through the lower side of the flow control plate flows upward again. In this way, the floatation efficiency of the float is improved by the flow control plate 36.

The swash plate 38 is installed obliquely so as to face the perforated plate 34 in the second zone 32 of the water purification ballast tank and face the bottom of the water purification ballast tank 14 with the upper end facing the discharge line 16, do. The swash plate 38 is installed so that the upper end of the swash plate 38 faces the discharge line 16 and the lower end of the swash plate 38 is directed toward the bottom of the water purification ballast tank 14 so that the sea water passing through the perforated plate 34 moves along the swash plate 38 It can not move upward due to the swash plate 38 of suspended solids mixed with seawater, and the sedimentation efficiency can be raised by falling downward. A plurality of swash plates 38 may be installed in the second zone 32 to increase the contact surface area with seawater.

The present embodiment is characterized in that the perforated plate 34, the flow control plate 36 and the swash plate 38 are sequentially installed and the seawater passing under the flow control plate 36 and flowing upward moves along the swash plate 38 Respectively.

A sediment discharge line 40 may be connected to one end of the bottom surface of the water purification ballast tank 14 in order to remove sediment from the water purification ballast tank 14. A spray nozzle 42 may be installed on the bottom surface of the water purification ballast tank 14 toward the sediment discharge line 40 in order to move the sediment to the sediment discharge line 40.

The sediment in the water purification ballast tank 14 can be discharged to the outside through the sediment discharge line 40. The sediment discharge line 40 may be connected to the seed chest 10. Further, the cleaning liquid may be sprayed through the spray nozzle 42 to move the sediment to the sediment discharge line 40 and to be discharged from the water purification ballast tank 14.

The ballast water supply system according to the present embodiment may include a second supply line 26 for directly supplying the seawater of the seed chute 10 to the filter unit 20, May be connected to the second supply line 26. When the seawater of the seed chest 10 is to be directly supplied to the filter section 20, the first supply line 12 and the discharge line 16 are shut off, The seawater of the chest 10 is directly supplied to the filter unit 20. [ Conversely, when the seawater of the seed chest 10 is to be supplied to the filter unit 20 via the water purification ballast tank 14, the valve of the second supply line 26 is shut off.

And a second conveyance line 28 branched from the first conveyance line 22 to convey the filtered seawater from the filter section 20 to the water ballast tank 14 for purification. When the seawater of the seed chest 10 is directly supplied to the filter unit 20 and the ballast water is required to be supplied to the water ballast tank 14 through the first transfer line 22, The sea water to be transferred can also be supplied to the water purification ballast tank 14 through the second transfer line 28.

3 is a flowchart illustrating a ballast water supply method according to an embodiment of the present invention. The method for supplying ballast water according to the present embodiment is a method for supplying ballast water by filtering seawater into a ballast tank partitioned by a plurality of sidewalls of a ship, the seawater being supplied to a selected water ballast tank among a plurality of ballast tanks A separating step S2 for separating floating matters and seawater by depositing floating matters mixed in the seawater introduced into the water ballast tank for purification, a discharging step S3 for discharging seawater at the top of the water ballast tank for discharging, A filtering step S4 for filtering the seawater, and a transfer step S5 for transferring the filtered seawater to the remaining ballast tanks.

Hereinafter, the ballast water supply method will be described in detail with reference to FIGS. 1 and 2. FIG.

Seawater is supplied from the seed chest 10 to the selected water ballast tank 14 among the plurality of ballast tanks 14, 24 (S1). The sea chest (10) is an access facility for seawater installed on the ship, and seawater taken from the sea chest (10) is supplied to the water ballast tank (14) and used as ballast water.

The water purification ballast tank 14 can be selected from among a plurality of ballast tanks 14 and 24 and is used as a space for separating floating matters in seawater before the seawater is supplied to the remaining ballast tank 24.

Next, the floating matters mixed in the seawater introduced into the water ballast tanks (14, 24) are settled to separate the float and the seawater (S2). The seawater taken from the seed chest (10) flows into the water ballast tank (14). During the stay in the water ballast tank (14), the suspended matter mixed with seawater is precipitated and the suspended matter and seawater are separated.

In order to increase the sedimentation speed of suspended solids contained in the seawater in the water ballast tank 14, a perforated plate 34 disposed in the direction of inflow of seawater may be installed in the water ballast tank 14. The internal space of the water purification ballast tank 14 around the perforated plate 34 can be divided into a first zone 30 and a second zone 32.

 The seawater supplied from the seed chest 10 flows into the first zone 30 of the water ballast tank 14 and the seawater flowing into the first zone 30 passes through the perforated plate 34 and flows into the second zone 30 32).

The seawater flowing into the first zone 30 of the water ballast tank 14 moves to the second zone 32 while passing through the porous plate 34. The seawater flowing at a constant flow rate passes through the porous plate 34 The flow velocity is decreased while passing, and sedimentation of the float contained in the seawater can be effectively made.

A flow control plate 36 for controlling the flow of seawater having passed through the perforated plate 34 is provided in the second zone 32 of the water ballast tank 14 in addition to the perforated plate 34, (38) can be installed.

The seawater that has passed through the perforated plate 34 flows to the lower side of the flow control plate 36 while bumping against the flow control plate 36. As the seawater flows to the lower side of the flow control plate 36, And is deposited on the bottom surface of the tank 14.

The seawater that has passed through the lower portion of the flow control plate 36 is moved upward along the swash plate 38 while being moved downward by the swash plate 38 of suspended solids mixed with the seawater, .

Next, seawater at the upper end of the water ballast tank 14 is discharged (S3).

During the above-described separation step (S3), the suspended matter mixed with seawater is settled on the bottom surface of the water purification ballast tank (14), and there is seawater on the upper part of the water purification ballast tank (14) The seawater from which the float is removed is discharged from the water ballast tank (14).

Next, the discharged seawater is filtered (S4). Filter the seawater from which suspended matter has been removed to filter out various microorganisms and fine particles mixed in seawater.

Next, the filtered seawater is transferred to the remaining ballast tank 24 (S5). The floating water is removed from the water ballast tank 14 and the filtered water is transferred to each ballast tank 24 to fill the ballast tank with ballast water.

As described above, by using the sedimentation action, it is possible to remove a large amount of suspended matters of various sizes, and by using the existing ship structure, it is possible to effectively filter the seawater without hindering the space utilization of the ship.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

Many embodiments other than the above-described embodiments are within the scope of the claims of the present invention.

10: seed chest 12: first supply line
14: water ballast tank 16: discharge line
18: pump 20: filter part
22: first transfer line 24: remaining ballast tank
26: second supply line 28: second transfer line
30: first zone 32: second zone
34: Perforated plate 36: Flow control plate
38: swash plate 40: sediment discharge line
42: Spray nozzle 44: Hull

Claims (8)

A system for supplying ballast water by filtering seawater into a ballast tank partitioned by a plurality of sidewalls of a ship,
A first supply line for supplying the seawater to a selected water ballast tank among the plurality of ballast tanks in a sea chest;
A perforated plate disposed in an internal space of the water purification ballast tank so as to be opposed to an inflow direction of seawater flowing in the first supply line;
A discharge line connected to an upper end of the water ballast tank for discharging the seawater;
A filter unit connected to the discharge line and filtering the seawater flowing through the discharge line; And
And a first transfer line for transferring the seawater filtered by the filter unit to the remaining ballast tanks of the hull. delete The method according to claim 1,
Further comprising a flow control plate disposed opposite said perforated plate of said water purification ballast tank. The method according to claim 1,
Further comprising a tilting plate disposed opposite to the perforated plate of the water purification ballast tank. The method according to any one of claims 1 and 3 to 4,
A sediment discharge line connected to one end of the bottom surface of the water ballast tank for discharging sediment to the outside; And
Further comprising a spray nozzle installed at the bottom surface of the water purification ballast tank toward the sediment discharge line. The method according to any one of claims 1 and 3 to 4,
And a second supply line for supplying the sea water from the seed chest to the filter section,
And the other end of the discharge line is connected to the second supply line. The method according to any one of claims 1 and 3 to 4,
Further comprising a second transfer line for transferring the seawater filtered at the filter unit, branched at the first transfer line, to the water ballast tank for purification. A method for supplying ballast water by filtering seawater into a ballast tank partitioned by a plurality of sidewalls of a ship,
A supply step of supplying the sea water from the seed chest to a selected water purification ballast tank among the plurality of ballast tanks;
A separation step of separating the suspended matter and the seawater by depositing suspended matters mixed with the seawater introduced into the water purification ballast tank;
A discharge step of discharging seawater at an upper end of the water ballast tank for purification;
A filtering step of filtering the discharged seawater; And
And transferring the filtered seawater to the remaining ballast tanks,
Wherein a perforated plate is disposed in an inner space of the water purification ballast tank so as to face the direction of inflow of seawater flowing into the water purification ballast tank.

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