JP5389703B2 - Ballast water treatment system and ballast water treatment method - Google Patents

Description

  The present invention relates to a ballast water treatment system and a ballast water treatment method.

  Conventionally, for example, from the viewpoint of the prevention of human anthropomorphism and the preservation of the marine environment, water treatment of ballast water (hereinafter simply referred to as “ballast water”) that has been flooded into or drained from a ballast tank A ballast water treatment system has been developed. In such a ballast water treatment system, a ballast water treatment apparatus (for example, see Patent Document 1) that performs water treatment of ballast water by supplying electric power may be used.

  In this case, as shown in FIG. 10, the ballast water treatment system 50 supplies the ballast water from the ballast water treatment device 51 and the sea chest (water intake port such as seawater and fresh water) 52 to the ballast water treatment device 51. An inflow passage 53 for inflow and an outflow passage 55 for outflow of ballast water from the ballast water treatment device 51 toward the ballast tank 54 are provided. A pump 56 that pumps the ballast water into the inflow passage 53. Is provided.

JP 2008-188506 A

  Here, in the ballast water treatment system 50 as described above, for example, when the ballast water treatment device 51 is actuated before the pump 56 is actuated at the time of starting the system, the ballast water treatment device 51 enters an anhydrous state operation. May generate heat and damage the ballast water treatment device 51. On the other hand, even if the ballast water treatment apparatus 51 is activated after the pump 56 is activated, depending on the operation timing (for example, when the operation of the ballast water treatment apparatus 51 is delayed), the ballast water treatment apparatus 51 is sufficient. There is a risk that the ballast water will be flooded into the ballast tank 54 without being subjected to proper water treatment.

  Then, this invention makes it a subject to provide the ballast water treatment system and the ballast water treatment method which can prevent damage to a ballast water treatment apparatus and can perform the water treatment of ballast water reliably.

  In order to solve the above problems, a ballast water treatment system according to the present invention is a ballast water treatment system for performing water treatment of ballast water that is flooded from the outboard to a ballast tank or drained from the ballast tank to the outboard. A ballast water treatment device that performs water treatment of ballast water by supplying electric power, an inflow channel that allows ballast water to flow into the ballast water treatment device, and an outflow that causes ballast water to flow out of the ballast water treatment device A first opening / closing means provided in the inflow channel for opening / closing the inflow channel, a second opening / closing means provided in the outflow channel for opening / closing the outflow channel, and a first opening / closing in the inflow channel A circulation channel that is connected downstream of the means and upstream of the second opening / closing means in the outflow channel and circulates the ballast water from the outflow channel to the inflow channel, and at least one of the inflow channel and the outflow channel Provided, a first pumping means for pumping the ballast water is provided in the circulation passage, characterized by comprising a second pumping means for pumping the ballast water, the.

  In the ballast water treatment system according to the present invention, for example, the following operation can be performed when the system is activated. That is, first, the first opening / closing means is opened and the second opening / closing means is closed, and the first pumping means is operated to inject ballast water into the ballast water treatment device. And while closing a 1st and 2nd opening-and-closing means, operating a ballast water treatment apparatus and performing a water treatment, a 2nd pumping means is operated and ballast water is circulated through a circulation channel. Then, while opening a 1st and 2nd opening-and-closing means and operating a ballast water treatment apparatus and performing a water treatment, a 1st pumping means can be operated and a ballast water can be flooded or drained. Thus, in this invention, since ballast water can be poured into a ballast water treatment apparatus before operating a ballast water treatment apparatus, it becomes possible to prevent the anhydrous operation of a ballast water treatment apparatus. And, since the ballast water can be circulated in the circulation channel while water-treating or draining the ballast water, sufficient water treatment is performed even for the ballast water injected before the operation of the ballast water treatment device. Can go and drain or drain. Therefore, it is possible to prevent damage to the ballast water treatment apparatus and reliably perform the water treatment of the ballast water.

  Here, as a configuration that preferably exhibits the above-described effects, it is specifically connected to the ballast water treatment device, the first and second opening / closing means, and the first and second pumping means, and controls these operations. And a control means that opens the first opening and closing means and closes the second opening and closing means, and operates the first pumping means to inject ballast water into the ballast water treatment device, And the second opening / closing means is closed, and the ballast water treatment device is operated to perform the water treatment, and the second pumping means is operated to circulate the ballast water through the circulation flow path. A configuration in which the second opening / closing means is opened and the ballast water treatment apparatus is operated to perform water treatment, while the first pressure feeding means is operated to flood or drain the ballast water.

  A ballast water treatment method according to the present invention is a ballast water treatment method for performing water treatment of ballast water using the ballast water treatment system, wherein the first opening / closing means is opened and the second opening / closing means is closed. In addition, the first pressure feeding means is operated to inject the ballast water into the ballast water treatment apparatus, and after the first step, the first and second opening / closing means are closed, and the ballast water treatment apparatus is The second step of operating the second pumping means to circulate the ballast water through the circulation channel while performing the water treatment by operating, and the first and second opening / closing means are opened after the second step. And a third step in which the ballast water treatment device is operated to perform water treatment, and the first pumping means is operated to flood or drain the ballast water.

  Also in this ballast water treatment method according to the present invention, since the ballast water is poured into the ballast water treatment device before the ballast water treatment device is operated, it is possible to prevent the ballast water treatment device from operating in an anhydrous state. . Since the ballast water is circulated in the circulation passage while being treated with water before the ballast water is drained or drained, it is sufficient for the ballast water injected before the operation of the ballast water treatment apparatus. It can be subjected to water treatment to drain or drain. . Therefore, it is possible to prevent damage to the ballast water treatment apparatus and reliably perform the water treatment of the ballast water.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to prevent damage to a ballast water treatment apparatus and to reliably perform water treatment of ballast water.

It is a schematic flowchart which shows operation | movement of the ballast water treatment system which concerns on 1st Embodiment of this invention. FIG. 2 is a schematic flowchart showing a continuation of FIG. 1. It is a flowchart which shows operation | movement of the ballast water treatment system of FIG. It is a schematic flowchart which shows operation | movement of the ballast water treatment system which concerns on 2nd Embodiment of this invention. FIG. 5 is a schematic flowchart showing the continuation of FIG. 4. It is a flowchart which shows operation | movement of the ballast water treatment system of FIG. It is a schematic flowchart which shows operation | movement of the ballast water treatment system which concerns on 3rd Embodiment of this invention. FIG. 8 is a schematic flowchart showing the continuation of FIG. 7. It is a flowchart which shows operation | movement of the ballast water treatment system of FIG. It is the schematic which shows the conventional ballast water treatment system.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

[First Embodiment]
First, a first embodiment of the present invention will be described. 1 and 2 are schematic flowcharts showing the operation of the ballast water treatment system according to the first embodiment of the present invention, and FIG. 3 is a flowchart showing the operation of the ballast water treatment system of FIG. As shown in FIGS. 1 and 2, a ballast water treatment system 1 according to the present embodiment is mounted on a ship and ballast water (hereinafter referred to as “water ballast tank” 3) is poured from a sea chest 2. (This is simply referred to as “ballast water”).

  The sea chest 2 is an intake for taking in water such as seawater and fresh water as ballast water W from the outside of the ship. The ballast tank 3 has a function of sinking the entire hull to a certain level with the weight of the ballast water W by storing the ballast water W therein. The ballast tank 3 here is constituted by, for example, providing a double hull structure by providing an internal partition inside the outer plate of the hull.

  The ballast water treatment system 1 includes a ballast water treatment device 4, an inflow channel 5, an outflow channel 6, and a circulation channel 7. The ballast water treatment device 4 is an electric device that performs water treatment (removal of aquatic organisms) of the ballast water W by supplying electric power. Various devices can be used as the ballast water treatment device 4. For example, the ballast water W can be applied by electrolytically treating the ballast water W by applying electric power to the electrodes, or by applying ultraviolet light by applying electric power to the ultraviolet lamp. Examples include those that treat W with water, and those that treat water by generating an electric field by applying electric power and applying an electric shock.

  The inflow channel 5 is connected to the sea chest 2 and the ballast water treatment device 4, and causes the ballast water W to flow into the ballast water treatment device 4. The inflow channel 5 is provided with a valve (first opening / closing means) V1 such as an electromagnetic valve for opening and closing the inflow channel 5. In addition, a ballast water pump (first pressure feeding means) P <b> 1 that pumps the ballast water W downstream is provided upstream of the valve V <b> 1 in the inflow channel 5.

  The outflow channel 6 is connected to the ballast tank 3 and the ballast water treatment device 4 and causes the ballast water to flow out from the ballast water treatment device 4. The outflow passage 6 is provided with a valve (second opening / closing means) V2 such as an electromagnetic valve for opening and closing the outflow passage 6.

  The circulation channel 7 is a channel provided so as to bypass the outflow channel 6 and the inflow channel 5. Specifically, one end of the circulation channel 7 is connected downstream of the valve V 1 in the inflow channel 5. And the other end is connected to the upstream of the valve V2 in the outflow passage 6. The circulation channel 7 circulates the ballast water W from the outflow channel 6 to the inflow channel 5.

  In addition, valves V3 and V4 such as solenoid valves for opening and closing the circulation channel 7 are provided on the inflow channel 5 side and the outflow channel 6 side in the circulation channel 7, respectively. Furthermore, between the valves V3 and V4 of the circulation flow path 7, a circulation pump (second pressure feeding means) P2 for pressure-feeding the ballast water W so as to circulate from the outflow flow path 6 to the inflow flow path 5 is provided. It has been.

  The ballast water treatment system 1 also includes a control unit (control means) 8 connected to the ballast water treatment device 4, valves V1 to V4, and pumps P1 and P2. The control unit 8 includes, for example, a CPU, a ROM, a RAM, and the like, and controls operations (operations) of the ballast water treatment device 4, the valves V1 to V4, and the pumps P1 and P2.

  In the ballast water treatment system 1 of the present embodiment configured as described above, the following operation (ballast water treatment method) is executed by the control unit 8 when the system is started, for example. That is, first, as shown in FIG. 1 (a), the valve V1 is opened (open state) and the valves V2 to V4 are closed (closed state), and the ballast water pump P1 is operated, so that the sea chest 2 The ballast water W is poured into the ballast water treatment device 4 (S1, S2: water injection step (first step)). Then, after the ballast water treatment device 4 is filled with the ballast water W and the filling of the ballast water treatment device 4 is completed, the ballast water pump P1 is stopped (S3, S4).

  Subsequently, as shown in FIG. 1B, the valves V1 and V2 are closed, the valves V3 and V4 are opened, and the ballast water treatment device 4 is operated to perform the water treatment while the circulation pump is operated. P2 is operated and the ballast water W is circulated through the circulation flow path 7 (S5, S6: circulation processing step (second step)). Thereby, the untreated ballast water W poured in the water pouring step is sufficiently treated with water.

  Then, as shown in FIG. 2, the valves V1 and V2 are opened and the valves V3 and V4 are closed, and the ballast water treatment device 4 is operated to perform the water treatment in the same manner as the normal ballast water W treatment. While being performed, the ballast water pump P1 is operated and the ballast water W is poured into the ballast tank 3 (S7, S8: normal processing step (third step)).

  Incidentally, the ballast water W remaining in the circulation channel 7 after the normal processing step is drained to the outside of the ship by a drain (not shown) connected to the circulation channel 7.

  As described above, in the present embodiment, the ballast water treatment device 4 can be filled with the ballast water W before the ballast water treatment device 4 is operated. Therefore, the anhydrous operation of the ballast water treatment device 4 can be prevented, and as a result, abnormal heat generation or the like of the ballast water treatment device 4 can be suppressed.

  And since the ballast water W can be circulated in the circulation flow path 7 while water-treating the ballast water W before the ballast water W is submerged, sufficient water is supplied to the ballast water W injected before the operation of the ballast water treatment device 4. Can be treated and flooded. That is, it is possible to prevent the ballast water W that has passed through the ballast water treatment device 4 before operation or the ballast water W that is insufficiently treated from being poured into the ballast tank 3 as it is.

  Therefore, according to this embodiment, it becomes possible to prevent the ballast water treatment apparatus 4 from being damaged and to reliably perform the water treatment of the ballast water W. As a result, it is possible to reduce the risk that the untreated ballast water W is flooded while improving the safety of the ballast water treatment system 1.

  Moreover, in this embodiment, it can implement | achieve only by installing a circulation flow path system (namely, circulation flow path 7, valve V3, V4, and circulation pump P2) in the existing ballast water treatment system, and it implements easily as an additional measure. It is possible.

  In the present embodiment, the ballast water treatment system 1 that irrigates the ballast water W from the sea chest 2 to the ballast tank 3 has been described as an example. Of course, it is good also as a ballast water treatment system which drains ballast water to 2. Furthermore, it is also possible to appropriately combine these (for example, by separately providing a flow path and a valve) to provide a ballast water treatment system that floods and drains the ballast water W (the same applies to the following embodiments).

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the description of this embodiment, the same description as in the first embodiment is omitted, and different points will be mainly described.

  4 and 5 are schematic flowcharts showing the operation of the ballast water treatment system according to the second embodiment of the present invention, and FIG. 6 is a flowchart showing the operation of the ballast water treatment system of FIG. As shown in FIGS. 4 and 5, the ballast water treatment system 20 of the present embodiment is different from the ballast water treatment system 1 (see FIG. 1) in that a buffer tank 21 is further provided.

  The buffer tank 21 is a tank having a predetermined capacity for temporarily storing the ballast water W, and is connected between the circulation pump P2 and the valve V4 in the circulation flow path 7.

  In such a ballast water treatment system 20 of this embodiment, for example, when the system is started, first, as shown in FIG. 4A, the valves V1 and V4 are opened and the valves V2 and V3 are closed. Then, the ballast water pump P1 is operated, and the ballast water W is poured from the sea chest 2 to the ballast water treatment device 4 and the buffer tank 21 (S21, S22: water injection step). Then, after at least the inside of the ballast water treatment device 4 is filled with the ballast water W and the filling of the ballast water treatment device 4 is completed, the ballast water pump P1 is stopped (S23, S24).

  Subsequently, as shown in FIG. 4B, the ballast water pump P1 is stopped, the valves V1 and V2 are closed, the valves V3 and V4 are opened, and the ballast water treatment device 4 is operated to While the process is being performed, the circulation pump P2 is operated and the ballast water W is circulated through the circulation flow path 7 (S25, S26: circulation process step). Thereby, the untreated ballast water W poured in the water pouring step is sufficiently treated with water.

  Subsequently, as shown in FIG. 5A, the valves V1 to V3 are opened and the valve V4 is closed to close the inflow portion of the circulation flow path 7, and the ballast water W in the buffer tank 21 flows into the inflow. After being drained to the path 5, the circulation pump P2 is stopped (S27, S28: buffer tank draining step).

  Then, as shown in FIG. 5 (a), the valves V1 and V2 are opened and the valves V3 and V4 are closed, and the ballast water treatment device 4 is operated in the same manner as the normal ballast water W treatment. While the water treatment is being performed, the ballast water pump P1 is activated and the ballast water W is poured into the ballast tank 3 (S29, S30: normal treatment step).

  As mentioned above, in this embodiment, since the buffer tank 21 is provided in the circulation flow path 7, and the ballast water W circulated in the circulation flow path 7 is temporarily stored in the buffer tank 21, the said circulation process step is stabilized. Can be implemented. Therefore, it is possible to further prevent the ballast water treatment apparatus 4 from being operated in an anhydrous state to prevent the ballast water treatment apparatus 4 from being damaged, and to perform the water treatment of the ballast water W more reliably.

  In this embodiment, at least the ballast water treatment apparatus 4 is filled with the ballast water W in the water injection step, and then the circulation process step is performed. However, both the ballast water treatment apparatus 4 and the buffer tank 21 are in the circulation step. In some cases, after a predetermined time has elapsed until the ballast water W is filled with the ballast water W, the process proceeds to the circulation processing step.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. In the description of this embodiment, the same description as in the second embodiment is omitted, and different points will be mainly described.

  7 and 8 are schematic flowcharts showing the operation of the ballast water treatment system according to the third embodiment of the present invention, and FIG. 9 is a flowchart showing the operation of the ballast water treatment system of FIG. As shown in FIGS. 7 and 8, the ballast water treatment system 30 of the present embodiment is different from the ballast water treatment system 20 (see FIG. 4) in that a ballast water sensor 31 is further provided.

  The ballast water sensor 31 is a sensor that detects whether or not the water treatment of the ballast water W is sufficiently performed until it reaches a predetermined level. In the outflow channel 6, the ballast water treatment device 4 is connected to the circulation channel 7. It is connected between the part 6a.

  In such a ballast water treatment system 30 of the present embodiment, as shown in FIG. 7A, for example, at the time of the normal treatment step (S29, S30), the ballast water sensor 31 performs “water treatment OK (that is, If the “water treatment is sufficiently performed” is detected, the normal processing step is subsequently executed (S31).

  On the other hand, as shown in FIG. 7B, when the “water treatment NG (that is, the water treatment is not sufficiently performed)” is detected by the ballast water sensor 31, the valves V1 and V4 are opened, and the valve The ballast water W is injected into the buffer tank 21 until V2 and V3 are closed and “water treatment OK” is detected by the ballast water sensor 31 (S31 to S33: buffer tank injection step).

  Subsequently, as shown in FIG. 8A, after the “water treatment OK” is detected by the ballast water sensor 31 (after S33), the valves V1 to V3 are opened and the valve V4 is closed. At the same time, the circulation pump P2 is operated (S34, S35: buffer tank draining step). Thus, the ballast water W stored in the buffer tank 21 as “water treatment NG” is subjected to water treatment again by the ballast water treatment device 4. Then, as shown in FIG. 8B, when the buffer tank 21 is emptied, the circulation pump P2 is stopped and the routine proceeds to the normal processing step (S36 to S38).

  As described above, in the present embodiment, the ballast water W that has been “water treated NG” by the ballast water sensor 31 is subjected to water treatment again by the ballast water treatment device 4. Therefore, even when the performance of the ballast water treatment apparatus 4 is insufficient and the water treatment becomes insufficient, the ballast water treatment apparatus 4 can be reprocessed without stopping.

  As mentioned above, although preferred embodiment of this invention was described, the ballast water treatment system which concerns on this invention is not restricted to the said ballast water treatment system 1,20,30 which concerns on embodiment, It describes in each claim It may be modified without changing the gist, or applied to other things.

  For example, in the above embodiment, the ballast water pump P1 is installed in the inflow channel 5, but the ballast water pump P1 may be installed in the outflow channel 6, or the inflow channel 5 and the outflow channel. 6 may be installed on both sides.

  In addition, the pumps P1 and P2 may be configured to be used as a single pump. For example, in the inflow channel 5, a pump is disposed between the connection point of the circulation channel and the ballast water treatment device 4, The pumps P1 and P2 may be combined with such a pump.

  Moreover, in the said embodiment, although the control part 8 is provided and the operation | movement (operation | movement) of the ballast water treatment apparatus 4, the valves V1-V4, and the pumps P1, P2 is controlled by this control part 8, this control part 8 is For example, an operator may operate (control) the operation of the ballast water treatment device 4, the valves V1 to V4, and the pumps P1 and P2.

  DESCRIPTION OF SYMBOLS 1,20,30 ... Ballast water treatment system, 3 ... Ballast tank, 4 ... Ballast water treatment apparatus, 5 ... Inflow flow path, 6 ... Outflow flow path, 7 ... Circulation flow path, 8 ... Control part (control means), P1 ... Ballast water pump (first pressure feeding means), P2 ... Circulation pump (second pressure feeding means), V1 ... Valve (first opening / closing means), V2 ... Valve (second opening / closing means).

Claims (3)

A ballast water treatment system for performing water treatment of ballast water that is flooded from outside the ship to the ballast tank or drained from the ballast tank to the outside of the ship,
A ballast water treatment device that performs water treatment of the ballast water by supplying electric power;
An inflow channel for allowing the ballast water to flow into the ballast water treatment device;
An outflow passage through which the ballast water flows out from the ballast water treatment device;
First opening / closing means provided in the inflow channel for opening / closing the inflow channel;
A second opening / closing means provided in the outflow channel for opening and closing the outflow channel;
A circulation passage connected to the downstream of the first opening / closing means in the inflow passage and upstream of the second opening / closing means in the outflow passage, and circulating the ballast water from the outflow passage to the inflow passage; ,
A first pumping means provided upstream of the first opening / closing means in the inflow channel and pumping the ballast water;
A second pumping means that is provided in the circulation channel and pumps the ballast water ;
The ballast water treatment system, wherein the second pumping means pumps the ballast water so that the ballast water circulates through the circulation channel when the first and second opening / closing means are closed . The ballast water treatment device, the first and second opening / closing means, and the first and second pumping means are connected to the ballast water treatment apparatus, and further includes a control means for controlling the operation thereof.
The control means includes
Opening the first opening and closing means and closing the second opening and closing means, operating the first pressure feeding means to inject the ballast water into the ballast water treatment device,
While closing said 1st and 2nd opening-and-closing means and operating said ballast water treatment apparatus and performing said water treatment, operating said 2nd pumping means and operating said ballast water via said circulation channel After circulating
While the first and second opening and closing means is opened, while the water treatment by operating the ballast water treatment system, is Minagimizu the ballast water by operating the first pumping means to said ballast tank , or ballast water treatment system according to claim 1, characterized in that drained from the ballast tank. A ballast water treatment method for performing water treatment of the ballast water using the ballast water treatment system according to claim 1,
A first step of opening the first opening / closing means and closing the second opening / closing means, and operating the first pumping means to inject the ballast water into the ballast water treatment device;
After the first step, the first and second opening / closing means are closed, and the ballast water treatment device is operated to perform the water treatment, while the second pumping means is operated to supply the ballast water. A second step of circulating through the circulation channel;
After the second step, the first and second opening / closing means are opened, and the ballast water treatment apparatus is operated to perform the water treatment, while the first pressure feeding means is operated to supply the ballast water. the ballast tank is Minagimizu to, or ballast water treatment method characterized by comprising: a third step of draining from the ballast tank.

Images