JP6203792B2 - Ballast water treatment system - Google Patents

Description

  The present invention relates to a ballast water treatment system.

  2. Description of the Related Art Conventionally, a processing device that removes or kills marine organisms in ballast water is known for ballast water supplied and discharged to a ballast tank provided in a ship. For example, Patent Document 1 describes that a ballast water treatment system is provided in a branch pipe branched from a line through which ballast water flows.

JP 2008-86892 A

  Ships equipped with ballast tanks include ships such as tankers that carry cargo oil. In particular, in such vessels, each of the ballast tanks on the cargo tank side where cargo oil is loaded and on the stern side where cargo oil is not loaded. May be provided. In this case, the equipment on the side of the cargo tank is provided with a predetermined explosion-proof measure in case the cargo oil or combustible gas volatilized from the cargo oil is mixed into the ballast water. On the other hand, the stern-side ballast tanks and lines separated from the cargo oil tank are not subjected to explosion-proof measures because the combustible gas volatilized from the cargo oil or cargo oil is difficult to be mixed into the ballast water.

  By the way, when an attempt is made to install a ballast water treatment system in such a ship, the cargo tank side where flammable gas volatilized from cargo oil or cargo oil can be mixed into the stern line where explosion-proof measures are not applied. It is not preferable to connect a line through which ballast water flows. Therefore, if it is attempted to provide separate ballast water treatment systems for both the ballast water on the cargo tank and the ballast water on the stern side, the configuration of the apparatus is duplicated and complicated, and the manufacturing cost of the ship increases. .

  The present invention has been made to solve such problems, and an object of the present invention is to provide a ballast water treatment system that can suppress an increase in manufacturing cost with a simple configuration.

  The ballast water treatment system according to the present invention includes a first ballast tank provided on the cargo tank side of a ship carrying cargo oil and storing ballast water, and a second ballast water provided on the stern side of the ship and storing ballast water. The first ballast tank, the ballast water treatment unit that removes or kills marine life in the ballast water, the first ballast tank and the ballast water treatment unit, and the first line through which the ballast water can circulate; The ballast tank and the ballast water treatment unit are connected, the second line through which the ballast water can flow, the second line is closed when the first line is open, and the second line is closed when the second line is open. And a flow path switching unit capable of closing one line.

  According to such a ballast water treatment system, the first line connecting the first ballast tank and the ballast water treatment unit provided on the cargo tank side by the flow path switching unit, and the second line provided on the stern side. It is possible to prevent the second line connecting the ballast tank and the ballast water treatment unit from being simultaneously opened. For this reason, it can suppress that the ballast water by the side of the cargo tank which can mix the combustible gas volatilized from cargo oil or cargo oil distribute | circulates the 2nd line where the explosion-proof measure is not given. Therefore, it is not necessary to provide separate ballast water treatment systems for both the ballast water on the cargo tank side and the ballast water on the stern side, and it is possible to treat with one ballast water treatment system. Therefore, an increase in manufacturing cost can be suppressed with a simple configuration.

  Here, the ballast water treatment system further includes a control unit that controls opening and closing of the first line and the second line by the flow path switching unit, and the control unit controls the flow path switching unit to control the first line. The second line may be closed when the line is open, and the first line may be closed when the second line is open. In this case, since the operation of the channel switching unit can be controlled by the control unit, it is not necessary to manually operate the channel switching unit. For this reason, it becomes possible to operate the flow path switching unit easily and reliably.

  According to the present invention, it is possible to provide a ballast water treatment system that can suppress an increase in manufacturing cost with a simple configuration.

1 is a schematic side view showing a ship to which a ballast water treatment system according to an embodiment of the present invention is applied. It is a schematic plan view of the ship shown in FIG. It is the III-III sectional view taken on the line in FIG. It is a schematic side view which shows the ballast water treatment system which concerns on embodiment of this invention.

  Hereinafter, preferred embodiments of a ship according to the present invention will be described with reference to the drawings. 1 is a schematic side view showing a ship to which a ballast water treatment system according to an embodiment of the present invention is applied, FIG. 2 is a schematic plan view of the ship shown in FIG. 1, and FIG. 3 is III-III in FIG. It is line sectional drawing. A ship is a ship which carries cargo oil, Comprising: As an example, suppose that it is a tanker here.

  As shown in FIGS. 1 and 2, in this ship 100, an engine room 1 is provided on the stern side (the left side of FIGS. 1 and 2) in the hull, and the bow side (FIG. 1) is provided from the engine room 1. 2 and the right side of FIG. 2, a pump chamber 2 is provided with a first partition wall 4 therebetween, and a plurality of oil tanks 3 are provided with a second partition wall 5 on the bow side from the pump chamber 2. Further, a plurality of first ballast tanks 6 are provided on the cargo tank 3 side of the ship 100, and a second ballast tank 7 is provided on the stern side from the engine room 1. The ceiling surfaces of the engine room 1, the pump chamber 2, and the oil tank 3 are composed of an upper deck 10, and the floor side is formed with a ship bottom skin 11 that forms the outer shell of the hull, as shown in FIGS. A double ship bottom structure is formed by an inner bottom plate 12 provided inside the hull of the ship bottom outer plate 11. The first bulkhead 4 and the second bulkhead 5 are provided so as to extend in the ship width direction (vertical direction in FIG. 2) and from the ship bottom outer plate 11 to the upper deck 10.

  The engine room 1 is provided with devices such as a main engine. The main engine is the largest device in the engine room 1 and drives a propeller that generates a propulsive force. A residence area and a steering room are provided above the engine room 1. The engine room 1 is provided with a second ballast pump 21 (see FIG. 4).

  The pump chamber 2 is provided with a first ballast pump 20 (see FIG. 4) that pumps seawater and a cargo oil pump (not shown) that pumps cargo oil. The cargo pump pumps the cargo oil in the cargo tank 3 and sends it out to the manifold on the upper deck 10 serving as a connection port of the land facility to unload it to the land facility.

  The cargo tank 3 stores cargo oil such as crude oil and refined oil transported by the ship 100. The cargo tank 3 is divided into 14 sections in total by dividing the inside of the hull into two in the ship width direction and seven in the ship length direction, for example. Depending on the cargo oil stored in the cargo tank 3, the combustible gas may volatilize.

  The first ballast tank 6 is a tank that is provided on the cargo tank 3 side and accommodates ballast water. Specifically, the first ballast tank 6 is provided between the ship bottom outer plate 11 and the inner bottom plate 12 so as to surround the oil tank 3 from the lower side and both sides in the ship width direction. Therefore, there is a possibility that the first ballast tank 6 is mixed with cargo oil or combustible gas volatilized from the cargo oil from the cargo tank 3. Therefore, the equipment on the side of the oil tank 3 is subjected to explosion-proof measures.

  The second ballast tank 7 is a tank that is provided on the stern side and accommodates ballast water. Specifically, the second ballast tank 7 is provided near the center in the vertical direction on the stern side of the engine room 1. Therefore, in the second ballast tank 7, it is difficult for the combustible gas volatilized from the cargo oil or the cargo oil to be mixed from the cargo tank 3. For this reason, the explosion-proof measures are not applied to the equipment on the cargo tank 3 side.

  The first and second ballast tanks 6 and 7 are in a state in which an amount of ballast water corresponding to the weight of the cargo oil loaded on the ship 100 is accommodated. The first and second ballast tanks 6 and 7 suck and store seawater (ballast water) with the first and second ballast pumps 20 and 21 (see FIG. 4), respectively, when the weight of the cargo oil is small. Increase the ballast water that has been. On the other hand, when the weight of the loaded cargo oil is large, the ballast water is discharged to the sea, and the stored ballast water is reduced. Thereby, the weight as the ship 100 whole containing cargo oil and ballast water is adjusted so that it may become the weight which can ensure sufficient draft while ensuring the stability of the ship 100.

  FIG. 4 is a schematic side view showing a ballast water treatment system according to an embodiment of the present invention. As shown in FIG. 4, the ballast water treatment system 30 treats ballast water in addition to the above-described first and second ballast tanks 6 and 7 and the first and second ballast pumps 20 and 21. A ballast water treatment unit 22, first and second sea chests 23 and 24 that are supply and discharge ports for ballast water, lines L1 to L14 through which ballast water can circulate, and valves for switching the flow paths of the lines L1 to L14 V1-V4 (flow-path switching part) and the control part 25 which controls valve | bulb V1-V4 are provided.

  The ballast water treatment unit 22 is a device that removes or kills marine organisms in the ballast water. The ballast water treatment unit 22 is disposed on the upper deck 10 of the cargo tank 3. The ballast water treatment unit 22 may be installed inside the pump chamber 2 instead of on the upper deck 10 of the cargo tank 3. As the ballast water treatment unit 22, various methods such as a method of treating ballast water by energizing the ballast water and a method of injecting a drug into the ballast water can be used. The ballast water treatment unit 22 treats the ballast water stored in the first and second ballast tanks 6 and 7. The ballast water treatment unit 22 treats the ballast water before injecting seawater from the sea into the ballast tank and before discharging the seawater from the ballast tank to the sea. The ballast water treatment unit 22 may treat the ballast water only before injecting seawater from the sea into the ballast tank or before discharging the seawater from the ballast tank into the sea.

  The first sea chest 23 is an opening provided below the pump chamber 2 and is equipped with a strainer in which many small-diameter holes (for example, circular holes with a diameter of 8 mm) are formed. Covered with a filter. The second sea chest 24 is an opening provided in the vicinity of the ship bottom of the engine room 1, and is equipped with a strainer in which many small-diameter holes (for example, circular holes with a diameter of 8 mm) are formed.

  A line L1 is connected to the first sea chest 23. A line L2 and a line L9 are connected to the line L1 via a branch point D1 on the side opposite to the first sea chest 23. The first ballast pump 20 is connected to the line L2 on the side opposite to the branch point D1. In addition to the line L2, the first ballast pump 20 is connected to a line L3 and a line L8. The ballast water is pumped from the line L2 to the line L3, and the ballast water from the line L8 to the line L3. Pumping is possible. A line L4 and a line L12 are connected to the line L3 via a branch point D2 on the side opposite to the first ballast pump 20. A ballast water treatment unit 22 is connected to the line L4 on the side opposite to the branch point D2. In addition to the line L4, a line L5 is connected to the ballast water treatment unit 22, and the ballast water from the line L4 can be treated and sent to the line L5. A line L6 and a line L13 are connected to the line L5 via a branch point D3 on the side opposite to the ballast water treatment unit 22. The line L6 is connected to the line L7 and the line L9 via the branch point D4 on the side opposite to the branch point D3. The first ballast tank 6 is connected to the line L7 on the side opposite to the branch point D4. In addition to the line L7, the line L8 is connected to the first ballast tank 6, so that ballast water can be injected from the line L7 and ballast water can be discharged to the line L8.

  A line L10 is connected to the second sea chest 24. A line L11 and a line L14 are connected to the line L10 via a branch point D5 on the side opposite to the second sea chest 24. A second ballast pump 21 is connected to the line L11 on the side opposite to the branch point D5. In addition to the line L11, the line L12 is connected to the second ballast pump 21, and the ballast water can be pumped from the line L11 to the line L12. The second ballast tank 7 is connected to the line L13 described above on the side opposite to the branch point D3. In addition to the line L13, the line L14 is connected to the second ballast tank 7, and it is possible to inject ballast water from the line L13 and discharge the ballast water to the line L14.

  The line L12 is provided with a valve V1 that opens / closes the line L12 and permits / prohibits the flow of ballast water. The line L3 is provided with a valve V2 that opens / closes the line L3 and permits / inhibits the flow of ballast water. The line L13 is provided with a valve V3 that opens / closes the line L13 and permits / prohibits the flow of ballast water. The line L6 is provided with a valve V4 that opens and closes the line L6 to permit / prohibit the flow of ballast water.

  The control unit 25 is connected to the valves V1, V2, V3, and V4 and can control the opening and closing of the valves V1, V2, V3, and V4.

  Then, operation | movement of the ballast water treatment system 30 which concerns on this embodiment is demonstrated.

  First, the operation of the ballast water treatment system 30 when the ballast water is treated by the ballast water treatment unit 22 and then injected into the first ballast tank 6 will be described. In this case, the control unit 25 opens the valves V2 and V4, and closes the valves V1 and V3. When the first ballast pump 20 is driven, the ballast water flows from the first sea chest 23 in the order of lines L1 and L2, is pumped by the first ballast pump 20 and flows in the order of lines L3 and L4, and ballast water treatment After being processed by the unit 22, it flows in the order of the lines L 5, L 6 and L 7 and is injected into the first ballast tank 6.

  At this time, lines L7, L6, L5 (first line) connecting the first ballast tank 6 and the ballast water treatment unit 22 are opened, and the second ballast tank 7 and the ballast water treatment unit 22 are connected. The line L13 (second line) is closed. For this reason, the first line on the cargo tank 3 side where the flammable gas volatilized from cargo oil or cargo oil can be mixed with the second line on the stern side where no explosion-proof measures are applied communicate with each other. There is no.

  Next, the operation of the ballast water treatment system 30 when the ballast water is treated by the ballast water treatment unit 22 and then discharged from the first ballast tank 6 will be described. In this case, the control unit 25 opens the valves V2 and V4, and closes the valves V1 and V3. When the first ballast pump 20 is driven, the ballast water flows through the line L8 from the first ballast tank 6, is pumped by the first ballast pump 20, and flows in the order of lines L3 and L4. After being processed, it flows in the order of lines L5, L6, L9, and L1, and is discharged from the first sea chest 23.

  At this time, lines L8, L3, and L4 (first lines) connecting the first ballast tank 6 and the ballast water treatment unit 22 are opened, and the second ballast tank 7 and the ballast water treatment unit 22 are connected. Lines L14, L11, and L12 (second line) are closed. For this reason, the first line on the cargo tank 3 side where the flammable gas volatilized from cargo oil or cargo oil can be mixed with the second line on the stern side where no explosion-proof measures are applied communicate with each other. There is no.

  Next, the operation of the ballast water treatment system 30 when the ballast water is treated by the ballast water treatment unit 22 and then injected into the second ballast tank 7 will be described. In this case, the control unit 25 opens the valves V1 and V3, and closes the valves V2 and V4. When the second ballast pump 21 is driven, the ballast water flows in the order of the lines L10 and L11 from the second sea chest 24, is pumped by the second ballast pump 21 and flows in the order of the lines L12 and L4, and the ballast water treatment After being processed by the unit 22, it flows in the order of the lines L 5 and L 13 and is injected into the second ballast tank 7.

  At this time, lines L7 and L6 (first line) connecting the first ballast tank 6 and the ballast water treatment unit 22 are closed, and a line L13 connecting the second ballast tank 7 and the ballast water treatment unit 22 is closed. , L5 (second line) is opened. For this reason, the first line on the cargo tank 3 side where the flammable gas volatilized from cargo oil or cargo oil can be mixed with the second line on the stern side where no explosion-proof measures are applied communicate with each other. There is no.

  Next, the operation of the ballast water treatment system 30 when the ballast water is processed by the ballast water treatment unit 22 and then discharged from the second ballast tank 7 will be described. In this case, the control unit 25 opens the valves V1 and V4 and closes the valves V2 and V3. When the second ballast pump 21 is driven, the ballast water flows from the second ballast tank 7 through the lines L14 and L11, is pumped by the second ballast pump 21 and flows in the order of the lines L12 and L4, and the ballast water treatment unit After being processed by 22, it flows in the order of lines L 5, L 6, L 9, L 1 and is discharged from the first sea chest 23.

  At this time, the lines L8, L7, L3 (first line) connecting the first ballast tank 6 and the ballast water treatment unit 22 are closed, and the second ballast tank 7 and the ballast water treatment unit 22 are connected. Lines L14, L11, L12, and L4 (second line) are opened. For this reason, the first line on the cargo tank 3 side where the flammable gas volatilized from cargo oil or cargo oil can be mixed with the second line on the stern side where no explosion-proof measures are applied communicate with each other. There is no.

  Thus, according to the ballast water treatment system 30 of the present embodiment, the first ballast tank 6 provided on the cargo tank 3 side and the ballast water treatment unit 22 are connected by the valves V1, V2, V3, and V4. It is possible to prevent the first line and the second line connecting the second ballast tank 7 and the ballast water treatment unit 22 provided on the stern side from being simultaneously opened. For this reason, it can suppress that the ballast water by the side of the cargo tank 3 in which the combustible gas volatilized from cargo oil or cargo oil can mix | circulates distribute | circulates the 2nd line where the explosion-proof measure is not given. Therefore, it is not necessary to provide separate ballast water treatment systems for both the ballast water on the cargo tank 3 side and the ballast water on the stern side, and it is possible to treat with one ballast water treatment system 30. Therefore, an increase in manufacturing cost can be suppressed with a simple configuration.

  The ballast water treatment system 30 further includes a control unit 25 that controls opening and closing of the first line and the second line by the valves V1, V2, V3, and V4. The control unit 25 includes the valves V1, V2, and V3. And V4, the second line is closed when the first line is open, and the first line is closed when the second line is open. In this case, since the operation of the valves V1, V2, V3, and V4 can be controlled by the control unit 25, it is not necessary to manually operate the valves V1, V2, V3, and V4. For this reason, it becomes possible to operate the valves V1, V2, V3 and V4 easily and reliably.

  As described above, the present invention has been specifically described based on the embodiment. However, the present invention is not limited to the above-described embodiment. For example, the ballast water treatment system 30 does not include the control unit 25 and includes the valve V1. , V2, V3, and V4 may be manually opened and closed.

  DESCRIPTION OF SYMBOLS 6 ... 1st ballast tank, 7 ... 2nd ballast tank, 22 ... Ballast water treatment part, 25 ... Control part, 30 ... Ballast water treatment system, L1-L14 ... Line, V1-V4 ... Valve (channel switching) Part).

Claims (2)

A first ballast tank provided on the side of a tank for loading cargo oil in a ship carrying cargo oil and containing ballast water;
A second ballast tank which is provided on the stern side where no cargo oil is loaded in the ship and in which ballast water is stored;
A ballast water treatment unit for removing or killing marine life in the ballast water;
The first sea chest,
A second sea chest,
The first sea chest and the ballast water treatment unit are connected, and a line through which the ballast water can be circulated,
Conclusion and said first ballast tank the ballast water treatment unit, and the line of the ballast water can flow,
A line that connects the second sea chest and the ballast water treatment unit, and through which the ballast water can be circulated,
Conclusion and said second ballast tanks the ballast water treatment unit, and the line of the ballast water can flow,
A valve for opening and closing a line connecting the first sea chest and the ballast water treatment unit, a valve for opening and closing a line connecting the first ballast tank and the ballast water treatment unit, the second sea chest and the A flow path switching unit having a valve for opening and closing a line connecting the ballast water treatment unit, and a valve for opening and closing a line connecting the second ballast tank and the ballast water treatment unit ;
A control unit capable of controlling the opening and closing of the valve of the flow path switching unit,
The control unit can control the flow path switching unit so that ballast water from the first sea chest is processed by the ballast water processing unit and injected into the first ballast tank, and the first The ballast water treatment system is capable of controlling the flow path switching unit so that the ballast water from the ballast tank is processed by the ballast water treatment unit and discharged from the first sea chest . Prior Symbol controller, capable of controlling the flow path switching unit to inject the second ballast tank ballast water is treated with the ballast water treatment unit from the second sea chest, and the first wherein the ballast water from the second ballast tank is treated with the ballast water treatment unit can control the flow path switching section so as to discharge from the first sea chest, 請 Motomeko 1, wherein Ballast water treatment system.

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