JP6086037B2 - Ballast water treatment equipment - Google Patents

Description

  The present invention relates to an apparatus for treating ballast water stored in a ship.

  Ballast water is seawater loaded on a ship so that the ship in an unloaded state can safely navigate the ocean. Ballast water is taken from the sea area around the ship and loaded onto the ship when the ship leaves the port. On the other hand, ballast water is discharged out of the ship at the port of call.

  Ballast water is discharged into a sea area different from the sea area where the ballast water is taken. The organisms in the ballast water are moved to sea areas that are not their native habitat. For this reason, there arises a problem that organisms in the ballast water affect the ecosystem in the sea area where the ballast water is discharged.

  In order to solve this problem, various methods for purifying ballast water have been studied. For example, Japanese Patent Application Laid-Open No. 2013-23187 (Patent Document 1) discloses a ballast water treatment apparatus aimed at reliably and efficiently performing a detoxification process for ballast water. This processing apparatus includes a filter and an ultraviolet irradiation unit. The treated water passed through the ballast water treatment line is first passed through a filter. Next, the water to be treated passes through the ultraviolet irradiation unit. When the water to be treated passes through the ultraviolet irradiation unit, the water to be treated is irradiated with ultraviolet rays. As a result, the water to be treated is sterilized.

  When the ultraviolet lamp is started up, the illuminance of the ultraviolet lamp does not reach the target illuminance immediately. Furthermore, immediately after the start of the pumping of seawater from the sea area, the turbidity of the seawater may be high. In these cases, there is a possibility that the irradiation amount of ultraviolet rays to seawater is not sufficient.

  According to the method disclosed in Japanese Patent Application Laid-Open No. 2013-23187, until the illuminance of the ultraviolet lamp reaches the target illuminance, the water to be treated is passed through a path that bypasses the ultraviolet irradiation unit. Then, when the lighting of the ultraviolet lamp is started, the water to be treated is passed through the ultraviolet irradiation unit. When the illuminance of the ultraviolet lamp reaches a predetermined illuminance, the water to be treated is poured into the ballast tank.

JP2013-23187A

  In order to realize the method disclosed in Japanese Patent Application Laid-Open No. 2013-23187, a route for bypassing the ultraviolet irradiation unit and passing the water to be treated is necessary. This complicates the configuration of the ballast water treatment device.

  The objective of this invention is providing the ballast water treatment apparatus which simplified the structure more.

  A ballast water treatment device according to an aspect of the present invention includes a filtration device having a filter for filtering the water to be treated, a case formed so that the water to be treated passes, and a case where the water is contained in the case. An ultraviolet irradiation device having an ultraviolet lamp for irradiating ultraviolet rays, a first path for supplying water to be treated from the filtration device to the case of the ultraviolet irradiation device, and ballasting the water to be treated that has passed through the case of the ultraviolet irradiation device A second path for supplying to the tank, a first valve provided in the first path, a second valve provided in the second path, and supply of water to be treated to the ballast tank Prior to performing the process of turning on the ultraviolet lamp, the control device keeps the first and second valves closed without passing the water to be treated through the first path until the ultraviolet lamp is turned on. With

  According to this configuration, the ultraviolet lamp is turned on before supplying the water to be treated to the ballast tank. Until the lighting of the ultraviolet lamp is completed, since the first and second valves are closed, the water to be treated is not passed through the ultraviolet irradiation device. This prevents the water to be treated from passing through the ultraviolet irradiation device in a state where the illuminance of the ultraviolet lamp is not sufficient for the killing treatment of the water to be treated. Furthermore, since the water to be treated is not passed through the first path until the lighting of the ultraviolet lamp is completed, it is not necessary to form a path through which the water to be treated bypasses the ultraviolet irradiation device. Therefore, the configuration of the ballast water treatment device can be further simplified.

  Preferably, the ultraviolet irradiation device includes an illuminance sensor for detecting the illuminance of the ultraviolet lamp. When the illuminance of the ultraviolet lamp detected by the illuminance sensor reaches the maximum value, the control device sets the first and second valves to the open state, and the treated water from the filtration device passes through the first path. Pass through the case of the UV irradiation device.

  According to this configuration, when the illuminance of the ultraviolet lamp reaches the maximum value, the water to be treated is passed through the case of the ultraviolet irradiation device. Therefore, the to-be-processed water killing process can be executed effectively.

  Preferably, the ballast water treatment device is provided on the inlet side of the water to be treated in the case of the ultraviolet irradiation device, and the first pressure gauge for measuring the water pressure on the inlet side and the water to be treated in the case of the ultraviolet irradiation device. And a second pressure gauge that measures the water pressure on the outlet side. The control device turns on the ultraviolet lamp when a calculated value based on the pressure value measured by the first pressure gauge and the pressure value measured by the second pressure gauge is within a predetermined normal range. .

  According to this configuration, it is possible to prevent the ultraviolet lamp from overheating during the lighting process of the ultraviolet lamp. The fact that the calculated value based on the pressure values measured by the first pressure gauge and the second pressure gauge is within a predetermined normal range indicates that water is sufficiently contained in the case. Yes. Even if the ultraviolet lamp generates heat during the process of turning on the ultraviolet lamp, the heat is taken away by the water stored in the case. Therefore, overheating of the ultraviolet lamp can be prevented.

  Preferably, when the supply of the water to be treated to the ballast tank is completed, the control device turns off the ultraviolet lamp while keeping the first and second valves closed.

  According to this configuration, it is not necessary to form a path for bypassing the ultraviolet irradiation device and allowing the water to be treated to pass, similarly to when the ultraviolet lamp is turned on. Therefore, the configuration of the ballast water treatment device can be further simplified.

  Preferably, when the ultraviolet lamp is turned off, the filtration device cleans the filter with the water to be treated introduced into the filtration device.

  According to this configuration, the filter of the filtration device is washed when the ultraviolet lamp is turned off. As a result, it is possible to avoid the turbidity remaining on the filter.

  Preferably, when the ultraviolet lamp is turned on, the filtration device cleans the filter using the water to be treated introduced into the filtration device.

  According to this configuration, the filter of the filtration device is washed while the ultraviolet lamp is turned on. The time required for starting up the ballast water treatment device can be shortened compared to the case where the UV lamp lighting process and the filter cleaning of the filter are performed continuously.

  Preferably, the ballast water treatment device further includes a back washing device that supplies washing water for washing the filter to the filtration device through the first path after washing the filter with the water to be treated.

  According to this structure, the effect which removes the turbid content adhering to a filter from a filter is improved more.

  Preferably, the ballast water treatment apparatus further includes a third path for supplying the water to be treated stored in the ballast tank to the ultraviolet irradiation apparatus, and a third valve provided in the third path. Prior to the supply of the water to be treated from the ballast tank to the ultraviolet irradiation device, the control device turns on the ultraviolet lamp with the second and third valves kept closed.

  According to this configuration, the ultraviolet lamp is turned on before the water to be treated is taken out from the ballast tank and supplied to the ultraviolet irradiation device. As in the case of supplying the water to be treated to the ballast tank, there is no need to form a path through which the water to be treated bypasses the ultraviolet irradiation device. Therefore, the configuration of the ballast water treatment device can be further simplified.

  Preferably, the control device is configured so that the flow rate of the water to be treated that passes through the case of the ultraviolet ray irradiation device becomes the first flow rate when the supply of the water to be treated from the ballast tank to the ultraviolet ray irradiation device starts. Then, the second and third valves are controlled so that the flow rate of the treated water passing through the case becomes a second flow rate larger than the first flow rate.

  According to such a structure, it can prevent that the flow volume of to-be-processed water changes rapidly. An ultraviolet lamp is housed inside the case of the ultraviolet irradiation device. When the flow rate of the water to be treated changes abruptly, there is a possibility that the ultraviolet lamp is damaged by the water hammer. By preventing the flow rate of the water to be treated from changing abruptly, the possibility that the ultraviolet lamp is damaged can be reduced.

  Preferably, when the control device ends the supply of the water to be treated from the ballast tank to the ultraviolet irradiation device, the second and third valves are arranged so that the flow rate of the water to be treated passing through the case of the ultraviolet irradiation device is decreased. And then the second and third valves are closed.

  According to such a configuration, it is possible to prevent the flow rate of the water to be treated from changing rapidly (the flow rate reaches 0 discontinuously). If the flow rate reaches zero discontinuously, the above-mentioned water hammer problem may occur. By preventing the flow rate of the water to be treated from changing abruptly, the possibility that the ultraviolet lamp is damaged can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the ballast water treatment apparatus which simplified the structure can be implement | achieved.

1 is an overall view of a ballast water management system according to an embodiment of the present invention. It is the figure which showed roughly one structural example of the control panel by the side of a ballast water treatment apparatus main body. It is a figure explaining the structural example of the filtration apparatus shown in FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. FIG. 4 is a schematic perspective view illustrating a typical configuration of the filter shown in FIG. 3. It is the figure which showed the example of a structure of the ultraviolet irradiation device shown in FIG. It is a 1st figure for demonstrating the state of the ballast water management system at the time of operating the select switch which selects local and remote. It is a 2nd figure for demonstrating the state of the ballast water management system at the time of operating the select switch which selects local and remote. It is the flowchart which showed the flow of control shown by FIG. It is a flowchart for demonstrating the flow of operation | movement of a ballast water treatment apparatus. It is a flowchart explaining the process at the time of the intake of ballast water based on Embodiment of this invention. It is a figure for demonstrating the process of step S101-S103 of FIG. It is a figure for demonstrating the process of step S104 of FIG. It is a figure for demonstrating the process of step S105 of FIG. It is a 1st figure for demonstrating the process (back washing | cleaning) of step S106 of FIG. FIG. 12 is a second diagram for explaining the process (back washing) in step S106 of FIG. FIG. 13 is a third diagram for explaining the process (back washing) in step S106 of FIG. It is a flow chart explaining processing at the time of drainage of ballast water concerning an embodiment of the invention. It is a figure for demonstrating the process of step S202-S204 of FIG. It is a typical block diagram for demonstrating another starting method of a ballast pump. It is a figure for demonstrating the intake of ballast water in bypass mode. It is a figure for demonstrating drainage of ballast water in bypass mode.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  In this embodiment, “ballast water” means seawater stored in a ballast tank. Therefore, in this specification, in order to clearly indicate that the ballast water is seawater, it may be expressed as “ballast water (seawater)”.

  In this embodiment, “water to be treated” means seawater to be treated by the ballast water treatment apparatus according to this embodiment. As described below, in this embodiment, “water to be treated” includes not only seawater taken into the ballast water treatment apparatus from the sea area but also “ballast water”. In addition, the term “seawater” may be used when it is not necessary to distinguish between ballast water and treated water.

<Configuration of ballast water management system>
FIG. 1 is an overall view of a ballast water management system according to an embodiment of the present invention. With reference to FIG. 1, the ballast water management system 100 which concerns on embodiment of this invention is installed in the ship which is not shown in figure. The ballast water management system 100 takes seawater from the sea area around the ship when the ship leaves the port, and stores the seawater in the ballast tank 5 as ballast water. On the other hand, the ballast water management system 100 discharges the ballast water stored in the ballast tank 5 to the sea area outside the ship in the port of call of the ship. The ballast tank 5 may be divided into a plurality of sections.

  The ballast water management system 100 includes a ballast water treatment device 101, a bypass system 102, and control devices 111 and 112. The ballast water treatment apparatus 101 performs a process of purifying seawater when taking seawater from the sea area around the ship. Furthermore, the ballast water treatment apparatus 101 can perform a process of purifying the ballast water stored in the ballast tank when discharging the ballast water (seawater) from the ballast tank 5. In this embodiment, “purification” includes removal, killing and inactivation of microorganisms contained in seawater.

  On the other hand, when the seawater is taken from the sea area around the ship, the bypass system 102 can bypass the ballast water treatment device 101 and load the taken seawater into the ballast tank 5. Further, when the ballast water (seawater) is discharged from the ballast tank 5, the bypass system 102 can bypass the ballast water treatment device 101 and discharge the ballast water to the sea. That is, the bypass system 102 forms a path for taking ballast water into and out of the ballast tank 5 while bypassing the ballast water treatment apparatus 101. Even when the bypass system 102 does not require the seawater to be processed by the ballast water treatment apparatus 101 or when the seawater cannot be processed by the ballast water treatment apparatus 101, the seawater is not supplied to the ballast tank 5. Can be put in and out.

  The ballast water treatment apparatus 101 and the bypass system 102 may have some elements in common. When the ship already has the bypass system 102, the ballast water management system 100 according to the embodiment of the present invention can be realized by adding the ballast water treatment device 101. Therefore, the ballast water management system 100 according to the embodiment of the present invention can be installed in a ship without significantly changing existing facilities.

  The ballast water treatment device 101 includes a filtration device 2, a reverse cleaning device 2A, an ultraviolet irradiation device 3, lines 20 to 27 for passing seawater, valves W1 to W7, flow meters FM1 and FM2, and a pressure gauge. P1-P4.

  The bypass system 102 includes a sea chest 1, a ballast pump BP, lines 11 to 16, valves W <b> 8 and 41 to 44, a ballast tank 5, and an overboard 6.

  Each of the above lines is realized by piping. The valves W1 to W8 are realized by, for example, proportional control valves. The opening degree of the valves W1 to W8 is controlled by a signal input to the valve. On the other hand, the valves 41 to 44 are realized by open / close valves, for example. In response to a signal input to each of the valves 41 to 44, each valve switches its state between an open state and a closed state.

  The sea chest 1 is provided in a ship in order to take seawater from the bottom of the ship, for example. A line 10 is connected to the sea chest 1. The line 11 is a line for passing seawater flowing into the ballast pump BP. The line 12 is a line for passing seawater flowing out from the ballast pump BP.

  Valve 41 switches between an open state and a closed state. In the open state of the valve 41, the ballast pump BP sucks seawater through the sea chest 1 and the lines 10 and 11 and discharges the seawater to the line 12. On the other hand, as will be described in detail later, when the valve 41 is closed, the ballast pump BP circulates seawater inside the ballast water management system 100.

  The line 12 is branched into a line 13 and a line 20. When the bypass system 102 is used, seawater is sent to the line 13. On the other hand, when the ballast water treatment apparatus 101 is used, seawater is sent to the line 20. Seawater is sent from line 12 to line 13 when valve W8 is open and valves W1 and W4 are closed. On the other hand, when the valves W8 and W4 are closed and the valve W1 is open, the seawater is sent from the line 12 to the line 20 and then to the line 21. Note that when the valves W8 and W1 are closed and the valve W4 is open, the seawater is sent from the line 12 to the line 20 and then to the line 27.

  Next, the ballast water treatment apparatus 101 will be described. Seawater flowing through the lines 20 and 21 is introduced into the filtration device 2 as treated water.

  The filtration device 2 includes a filter 61 and a motor 90. The filter 61 filters the seawater that flows through the line 21. Seawater filtered by the filter 61 flows out from the filtration device 2 through the line 22. The motor 90 rotates the filter 61 when seawater is filtered and when the filter 61 is washed.

  The pressure gauge P <b> 1 measures the pressure of seawater on the inlet side of the filtration device 2. On the other hand, the pressure gauge P <b> 2 measures the pressure of seawater on the outlet side of the filtration device 2.

  The line 22 forms a first path for supplying seawater filtered by the filtering device 2 to the ultraviolet irradiation device 3. The line 22 is provided with a valve W2.

  On the other hand, seawater that has not been filtered by the filtering device 2 is discharged from the filtering device 2 through the line 23. Line 23 is branched into lines 24 and 25.

  The line 24 is connected to the overboard 6. Seawater passing through the line 24 is discharged to the sea via the overboard 6. Line 25 merges with line 24. Therefore, the lines 23 to 25 form a drainage path for discharging seawater remaining in the filtration device 2.

  The flow meter FM2 measures the flow rate of seawater flowing through the line 23. The valve W3 controls the flow rate of seawater flowing through the line 24. The valve W7 controls the flow rate of seawater flowing through the line 25.

  The ultraviolet irradiation device 3 includes a UV (ultraviolet) lamp 142. Seawater flowing through the line 22 is passed through the ultraviolet irradiation device 3. The UV lamp 142 irradiates the seawater passing through the ultraviolet irradiation device 3 with ultraviolet rays. The water to be treated is filtered by the filter 61 and then receives ultraviolet rays by the ultraviolet irradiation device 3. Therefore, even if a small UV lamp is used, it is possible to obtain an effect of killing microorganisms living in the filtered seawater. By using a small UV lamp for the ultraviolet irradiation device 3, advantages such as downsizing of the device and saving of current consumption can be obtained.

  The line 26 is a line for passing seawater flowing out from the ultraviolet irradiation device 3. The line 26 joins the line 13. The line 26 forms a second path for supplying the treated water that has passed through the case of the ultraviolet irradiation device 3 to the ballast tank 5.

  The valve W5 is provided in the line 26. When valve W5 is open, seawater is sent from line 26 to line 13. Accordingly, seawater passes through the ultraviolet irradiation device 3.

  Pressure gauges P3 and P4 are provided on line 22 and line 26, respectively. The pressure gauge P3 measures the water pressure on the inlet side of the ultraviolet irradiation device 3. The pressure gauge P4 measures the water pressure on the outlet side of the ultraviolet irradiation device 3.

  The line 27 forms a path that bypasses the filtration device 2 and joins the line 22. When discharging the water to be treated stored in the ballast tank 5, the line 27 realizes a third path for supplying the water to be treated from the ballast tank 5 to the ultraviolet irradiation device 3 by bypassing the filtering device 2. . As described above, when the valve W1 is closed and the valve W4 is open, seawater is sent from the line 20 to the line 22 via the line 27.

  The reverse cleaning apparatus 2A includes a cleaning water tank 68, valves W6, W9 to W11, and lines 28 to 31.

  The line 28 is connected to the compressed air supply unit 32 and the washing water tank 68. The line 28 is provided with a valve W9 and a pressure gauge PS. The line 28 introduces compressed air into the wash water tank 68 by opening the valve W9.

  The line 29 is a line for extracting air from the washing water tank 68. The line 29 is provided with a valve W11 for releasing pressure. When the air is extracted from the cleaning water tank 68, the valve W11 is opened.

  The line 30 is a line for supplying fresh water from the fresh water supply unit 33 to the cleaning water tank 68. The line 30 is provided with a valve W10. When fresh water is supplied from the fresh water supply unit 33 to the cleaning water tank 68, the valve W10 is opened.

  The line 31 branches from a position between the filtration device 2 and the valve W2 in the line 22. The line 31 is provided with a valve W6. When supplying cleaning water from the cleaning water tank 68 to the filtration device 2, the valve W6 is opened. On the other hand, when seawater is filtered by the filter 61 of the filtration device 2, the valve W6 is closed.

  Next, the bypass system 102 will be described. The line 13 branches into a line 14 and a line 15. The line 14 is connected to the ballast tank 5. The line 14 is provided with a valve 42.

  Line 15 is connected to overboard 6. The line 15 is provided with a valve 43.

  The line 16 connects the line 14 and the line 11. The line 16 is provided with a valve 44.

  The valve 42 is opened and the valves 43 and 44 are closed. Thereby, the seawater sent to the line 14 through the line 13 is supplied to the ballast tank 5. When the valve 42 is closed and the valve 43 is opened, the seawater is sent from the line 13 to the line 15 and the overboard 6 and discharged to the sea. When the valves 42 and 44 are opened and the valve 43 is closed, the seawater passes through the line 11, the line 12, the line 13, the line 14, and the line 16 and circulates inside the bypass system 102.

  The ballast water management system 100 further includes control devices 111 and 112. The control devices 111 and 112 can be operated by an operator (not shown). The operation of the control device by the operator corresponds to inputting the operator's instruction to the control device.

  The control devices 111 and 112 receive instructions from the operator and control the ballast water management system 100 according to the instructions. That is, the control devices 111 and 112 are also setting devices for setting the operation mode of the ballast water management system 100. Specifically, the control devices 111 and 112 control driving and stopping of the ballast pump BP. Further, the control devices 111 and 112 control the opening / closing or opening of each valve shown in FIG. Furthermore, the control devices 111 and 112 control the turning on and off of the UV lamp 142 included in the ultraviolet irradiation device 3.

  The control devices 111 and 112 have a communication function. The control device 111 can grasp the setting for itself and can transmit information related to the setting to the control device 112. Similarly, the control device 112 can grasp the setting for itself and the control device 111 can grasp information related to the setting. Therefore, the control devices 111 and 112 can be installed at locations away from each other.

  For example, the control device 111 is installed near the ballast water treatment device 101. On the other hand, the control device 112 is installed, for example, on a bridge. According to such an arrangement of the control devices 111 and 112, the operator can remotely control the ballast water treatment device 101 and the bypass system 102 by the control device 112.

  The operator can control the operation and stop of the ballast water management system 100 by operating one of the control devices 111 and 112. Further, the operator operates one of the control devices 111 and 112 to change the operation mode of the ballast water management system 100 to the ballast water treatment mode (referred to as “BWMS” mode in this embodiment). It is possible to switch between “BYPASS” (bypass) mode. The ballast water treatment mode is a mode in which the ballast water treatment apparatus 101 is operated. The bypass mode is a mode in which the ballast water treatment apparatus 101 is stopped and the bypass system 102 is operated.

  Furthermore, the operator can switch the process of the ballast water management system 100 in the BWMS mode or the BYPASS mode by operating one of the control devices 111 and 112. In this embodiment, the processing mode includes a “manual mode”, a “ballasting mode”, and a “De-ballasting mode”.

  The “manual mode” is a mode in which the operator designates a specific valve for any one of the control devices 111 and 112 and designates opening / closing or opening of the valve. The “Ballasting mode” is a mode in which the ballast water management system 100 performs a process of taking seawater from the sea and injecting it into the ballast tank 5. The “De-Ballasting mode” is a mode in which the ballast water management system 100 performs a process of discharging ballast water (seawater) stored in the ballast tank 5 to the sea.

  In the “Ballasting mode” and “De-Ballasting mode”, each valve is automatically controlled by the control device 111 or 112.

  In this embodiment, the ballast water management system 100 can realize processing in “Ballasting mode” and “De-Ballasting mode” regardless of whether the operation mode is the BWMS mode or the BYPASS mode. Composed. However, the ballast water management system 100 may be able to implement processing in the “Ballasting mode” and the “De-Ballasting mode” only when the operation mode is the BWMS mode.

  In one embodiment, the control devices 111 and 112 are realized as a control panel. FIG. 2 is a diagram schematically showing one configuration example of a control panel on the ballast water treatment apparatus main body side. Referring to FIG. 2, control device 111 (control panel) includes lamp group 120, push buttons 122 and 126 to 130, and select switches 123 to 125.

  The select switch 123 is a switch for switching whether the ballast water treatment device 101 is controlled by the control device 111 (local) or controlled by the control device 112 (remote). When “Local” is selected by the select switch 123, the operation and stop of the ballast water treatment apparatus 101 can be controlled by the push button or the select switch of the control device 111. On the other hand, the command from the control device 112 becomes invalid. On the other hand, when “remote” is selected by the select switch 123, the operation of the push button or the select switch of the control device 111 becomes invalid and the command from the control device 112 becomes valid.

  A command from the control device 112 is sent to the ballast water treatment device 101 via the control device 111. Based on the setting of the select switch 123, the control device 111 determines whether to enable or disable the command from the control device 112.

  The select switch 124 is a switch for the operator to instruct the control device 111 of the operation mode of the ballast water management system 100. Specifically, the select switch 124 is configured to be able to switch the operation mode of the ballast water management system 100 among a bypass mode, a BWMS mode, and a manual mode.

  The select switch 125 is a switch for the operator to instruct the control device 111 of the processing mode of the ballast water treatment device 101 when the BWMS mode is selected. Specifically, the select switch 125 is configured so that the processing mode of the ballast water treatment apparatus 101 can be switched between the Ballasting mode and the De-Ballasting mode.

  The push button 122 is a button for operating the ballast water treatment apparatus 101 in the Ballasting mode or the De-Ballasting mode. On the other hand, the push button 126 is a button for stopping the operation of the ballast water treatment apparatus 101 in the Ballasting mode or the De-Ballasting mode. When the operator presses the push button 122, the control device 111 receives an instruction to start processing for purifying seawater. When the operator presses the push button 126, the control device 111 receives an instruction to stop the process of purifying seawater.

  The push buttons 127 to 129 are a button for stopping a buzzer, a button for resetting an alarm, and a button for checking a lamp, respectively. The push button 130 is a button for stopping the ballast water treatment apparatus 101 in an emergency.

  The lamp group 120 includes a plurality of lamps for indicating the state of the ballast water management system 100. When the ballast water treatment apparatus 101 is ready to treat seawater, the lamp 120a is turned on. When the push button 122 is pressed, the lamp 120b is turned on.

  When the ballast water treatment apparatus 101 operates in the Ballasting mode, the lamp 120c is turned on. On the other hand, when the ballast water treatment apparatus 101 operates in the De-Ballasting mode, the lamp 120d is turned on. Further, when the ballast water treatment apparatus 101 is in an emergency stop, the lamp 120e is turned on. The number, arrangement and role of the lamps are not limited as described above.

  Further, the control device 112 may employ a configuration similar to the configuration shown in FIG. When one of the control devices 111 and 112 fails, the ballast water management system 100 can be controlled by the other. That is, the control device is duplicated. Therefore, the reliability of the ballast water management system 100 can be improved. Alternatively, the control device 112 may have a configuration in which the select switch 123 is omitted from the configuration shown in FIG. With such a configuration, the control device 111 can centrally control whether the command from the control device 112 is validated or invalidated.

  Although not shown in FIG. 2, one or both of the control devices 111 and 112 can include a display panel. Further, the display panel may have a touch panel function.

  FIG. 3 is a diagram illustrating a configuration example of the filtration device 2 illustrated in FIG. 1. 4 is a cross-sectional view taken along line IV-IV in FIG.

  With reference to FIGS. 3 and 4, seawater that is to be treated passes through the to-be-treated water flow path 66 corresponding to line 21 in FIG. 1 and is supplied to the inside of case 63. A cylindrical filter 61 is provided inside the case 63. An axis C indicates the central axis of the filter 61 (cylinder). In other words, the filter 61 is disposed so as to surround the axis C.

  The motor 90 is connected to the central axis of the filter 61. The motor 90 rotates the filter 61 about the axis C when electric power is supplied from a driving device (not shown). The motor 90 is covered with a motor cover 91. The motor 90 is controlled by, for example, the control device 111 shown in FIG.

  The upper and lower cylindrical surfaces of the filter 61 are closed watertight. The rotatable mounting structure also needs to be a watertight structure, but a known structure is used without any particular limitation.

  The case 63 covers the entire filter 61. The case 63 has an outer cylinder part 71, a lid part 72, and a bottom part 73. The bottom 73 is provided with a discharge channel 65 corresponding to the line 23 in FIG. In the case 63, a water channel 66 to be treated and a water nozzle 62 to be treated are provided in order to introduce seawater as the water to be treated. In addition, a chemical solution inlet 70 is provided in the lid portion of the case 63. However, it is not essential to provide the case 63 with a chemical injection port.

  The treated water nozzle 62 is configured to extend from the treated water flow channel 66. A nozzle port 67 is formed at the tip of the water nozzle 62 to be treated. The nozzle port 67 is disposed in the outer cylinder portion 71 of the case 63. The nozzle port 67 is formed so that the water to be treated flows out from the nozzle port 67 toward the outer peripheral surface of the filter 61.

  The central pipe 80 is disposed on the axis C. The central pipe 80 is connected to a filtrate flow path 64 corresponding to the line 15 in FIG. The central pipe 80 does not rotate.

  FIG. 5 is a schematic perspective view illustrating a typical configuration of the filter 61 shown in FIG. 4 and 5, the filter 61 is a pleated filter. A so-called pleated shape is formed by alternately folding a flat belt-like substrate. A cylindrical pleated filter is formed by joining both ends of a substrate formed in a pleat shape.

  A porous resin sheet is used for the filter substrate. Examples of the material of the porous resin sheet include porous materials such as a stretched porous material, a phase-separated porous material, and a nonwoven fabric made of polyester, nylon, polyethylene, polypropylene, polyurethane, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), and the like. Quality structures are used. In order to perform filtration at a high flow rate, a nonwoven fabric made of polyester such as polyethylene terephthalate is particularly preferably used.

  Referring to FIG. 3 again, the water to be treated passes through the water passage 66 to be treated and is ejected from the nozzle port 67 of the water nozzle 62 to be treated. The water to be treated ejected from the nozzle port 67 is transmitted from the outside of the cylinder of the filter 61 to the inside of the cylinder. As a result, the water to be treated is filtered. The water to be treated that has been filtered through the filter 61 is guided to the filtered water flow path 64 through a water intake hole 81 provided in the central pipe 80 and flows out of the filtering device 2.

  On the other hand, the water to be treated that has not been filtered by the filter 61 and the suspended matter that has settled on the bottom 73 of the case 63 are discharged to the outside of the filtration device 2 through the discharge channel 65. Thus, filtration is performed while the turbid component or the remaining water to be treated is continuously discharged. Thereby, the processing amount (for example, 10-20 ton / hour, Furthermore, 100 ton / hour) requested | required as a processing amount of ballast water is securable.

  In the above operation, turbidity adheres to the outer peripheral surface of the filter 61. According to the configuration shown in FIG. 3, the motor 90 rotates the filter 61. The water to be treated ejected from the nozzle port 67 hits the outer peripheral surface of the rotating filter 61. A water flow is always generated on the outer peripheral surface of the filter 61 by the pressure of the water to be treated and the rotating water flow. As a result, turbid components adhering to the filter 61 are easily removed. That is, according to this embodiment, in addition to the effect of filtering the water to be treated, a certain cleaning effect can also be obtained.

  FIG. 6 is a diagram illustrating a configuration example of the ultraviolet irradiation device 3 illustrated in FIG. 1. With reference to FIG. 6, the ultraviolet irradiation device 3 includes a case 141, a UV lamp 142, a lamp power supply 143, and illuminance sensors 144a, 144b, and 144c.

  The case 141 is disposed between the line 22 and the line 23. Case 141 accommodates UV lamp 142. The treated water passes through the inside of the ultraviolet irradiation device 3 by the lines 22 and 23.

  The UV lamp 142 irradiates the water to be treated that passes through the inside of the case 141 with ultraviolet rays. The UV lamp 142 is turned on and off by the control device 111 or the control device 112.

  The illuminance sensors 144a to 144c measure the illuminance of ultraviolet rays emitted from the UV lamp 142 and transmitted through the water to be treated. The illuminance detected by each illuminance sensor is sent from the illuminance sensor to the control device 111. Based on the detection results of the illuminance sensors 144a to 144c, the control device 111 instructs the lamp power supply 143 to determine the ratio of the UV lamp 142 to the maximum power. The lamp power supply 143 supplies power according to the instructed ratio to the UV lamp 142.

<Control of ballast water management system>
1. Setting of Operation Mode As described above, for the purpose of setting the operation mode of the ballast water management system 100, the operator of the ballast water management system 100 can operate both the control device 111 and the control device 112. If there is only one device for setting (and monitoring) the ballast water management system 100, the operator must move to the location of the control device. In the case of a large building such as a ship, the labor for the operator to move to the installation location of the control device may be increased.

  According to this embodiment, the ballast water management system 100 has a plurality of control devices for the operator to set (and monitor) the operation mode of the ballast water management system 100. The plurality of control devices can be distributed and arranged on the ship. Thereby, the operator can utilize the control apparatus arrange | positioned near self. Therefore, the convenience for the operator can be enhanced.

  On the other hand, the operation mode of the ballast water management system 100 can be set by either of the control devices 111 and 112. For this reason, when the select switch 123 of the control device 111 is switched between “local” and “remote”, the setting of the operation mode may be changed. In this embodiment, the above problem can be solved.

  FIG. 7 is a first diagram for explaining the state of the ballast water management system when a select switch for selecting local and remote is operated. Referring to FIG. 7, the operation mode is set to either the BWMS mode or the BYPASS mode in each of the local control device (control device 111) and the remote control device (control device 112). In the control device 111, the select switch 123 is switched from “local” to “remote”. Alternatively, the select switch 123 is switched from “remote” to “local”.

  It is assumed that the operation mode is set to “BWMS mode” or “BYPASS” mode in both control device 111 and control device 112. When the select switch 123 is switched between “local” and “remote”, as will be described later, if the processing mode settings of the control device 111 and the control device 112 match, the ballast water management system 100 operations are continued.

  On the other hand, the operation mode of the ballast water management system 100 is set to “BWMS mode” on one of the control device 111 and the control device 112, and the operation mode of the ballast water management system 100 is set to “BYPASS” mode on the other side. Suppose that When the select switch 123 is switched between “local” and “remote”, the ballast water management system 100 stops.

  FIG. 8 is a second diagram for explaining the state of the ballast water management system when a select switch for selecting local and remote is operated. As a premise, the operation mode is set to the BWMS mode or the BYPASS mode in both the local control device (control device 111) and the remote control device (control device 112).

  Referring to FIG. 8, it is assumed that the processing mode is set to “Ballasting mode” or “De-Ballasting mode” in both control device 111 and control device 112. When the select switch 123 is switched between “local” and “remote”, the operation of the ballast water management system 100 is continued. That is, processing in the set processing mode (“Ballasting mode” or “De-Ballasting mode”) is executed.

  On the other hand, it is assumed that the processing mode setting differs between the control device 111 and the control device 112. In such a case, when the select switch 123 is switched between “local” and “remote”, the ballast water management system 100 stops.

  In the case of such an example, the setting of the operation mode of the ballast water treatment apparatus 101 differs between the control device 111 and the control device 112. Accordingly, when the select switch 123 of the control device 111 is switched from “local” to “remote”, the operation mode of the ballast water treatment device 101 may be changed.

  Therefore, in this embodiment, when the select switch 123 of the control device 111 is switched between “local” and “remote”, the operation mode of the ballast water management system 100 is controlled between the control device 111 and the control device 112. Are the same, the operation of the ballast water management system 100 in the operation mode is continued. On the other hand, when the setting of the operation mode of the ballast water management system 100 is different between the control device 111 and the control device 112, the selection switch 123 of the control device 111 is switched between “local” and “remote”. The current process stops.

  Even when the setting of the select switch 124 is different between the control device 111 and the control device 112, the current processing is performed when the select switch 123 of the control device 111 is switched between “local” and “remote”. Is stopped. That is, in one of the control device 111 and the control device 112, the select switch 124 is set to “BWMS mode”, and on the other hand, the select switch 124 is set to “BYPASS mode”. In such a case, when the select switch 123 of the control device 111 is switched between “local” and “remote”, the current processing is stopped.

  FIG. 9 is a flowchart showing a flow of control shown in FIG. The process shown in FIG. 9 is called from the main routine by the control device 111 at predetermined intervals, for example. Referring to FIG. 9, in step S <b> 1, control device 111 determines whether switching of select switch 123 between “local” and “remote” has occurred.

  In step S1, when the setting switch 123 is switched (YES in step S1), the process proceeds to step S2. On the other hand, when the setting switch 123 has not been switched (NO in step S1), the process returns to the main routine.

  In step S2, the control device 111 determines whether the operation mode setting of the ballast water management system 100 is “BWMS mode” on both the local side (control device 111) and the remote side (control device 112). For example, the control device 111 confirms the setting of the operation mode of the ballast water management system 100 in the control device 111. Furthermore, the control device 111 acquires information regarding the setting of the operation mode of the ballast water management system 100 in the control device 112 from the control device 112.

  When the operation mode setting of ballast water management system 100 on at least one of the local side and the remote side is not “BWMS mode” (NO in step S2), the process proceeds to step S3. In step S <b> 3, the control device 111 determines whether or not the operation mode setting of the ballast water management system 100 is “BYPASS mode” on both the local side and the remote side.

  If the setting of the operation mode of ballast water management system 100 is “BYPASS mode” on both the local side and the remote side (YES in step S3), the process proceeds to step S4. Further, when both the local side and the remote side are set to the “BWMS mode” in the operation mode of the ballast water management system 100 (YES in step S2), the process proceeds to step S4. On the other hand, when the setting of the operation mode of the ballast water management system 100 on one of the local side (the control device 111) and the remote side (the control device 112) is not “BYPASS mode” (NO in step S3), the process is described later. Proceed to S8.

  In step S4, the control device 111 determines whether the processing mode setting of the ballast water management system 100 is “Ballasting mode” on both the local side and the remote side. If the processing mode setting of the ballast water management system 100 is “Ballasting mode” on both the local side and the remote side (YES in step S4), the process proceeds to step S5. In step S5, the control device 111 continues the processing of the ballast water management system 100. That is, the ballast water management system 100 operates in the Ballasting mode.

  On the other hand, when the setting of the processing mode of the ballast water management system 100 on one of the local side and the remote side is different from “Ballasting mode” (NO in step S4), the process proceeds to step S6. In step S <b> 6, the control device 111 determines whether the setting of the processing mode of the ballast water management system 100 is “De-Ballasting mode” on both the local side and the remote side.

  When the processing mode setting of ballast water management system 100 is “De-Ballasting mode” on both the local side and the remote side (YES in step S6), the process proceeds to step S7. In step S <b> 7, the control device 111 continues the processing of the ballast water management system 100. That is, the ballast water management system 100 operates in the De-Ballasting mode.

  If NO in step S3 and NO in step S6, the process proceeds to step S8. The case of NO in step S3 corresponds to the case where the operation mode setting of the ballast water management system 100 is “BWMS mode” on one of the local side and the remote side and “BYPASS mode” on the other side. The case of NO in step S6 is when the processing mode setting of the ballast water management system 100 is “Ballasting mode” on one of the local side and the remote side and “De-Ballasting mode” on the other side. Correspond. In step S8, the control device 111 stops the processing of the ballast water management system 100.

  With the above control, the ballast water management system 100 can be operated in the correct mode. The “correct mode” is an operation mode and a processing mode intended by the operator. Therefore, it is possible to prevent the mode of the ballast water management system 100 from being changed to a mode not intended by the operator.

  FIG. 10 is a flowchart for explaining the operation flow of the ballast water treatment apparatus 101. Referring to FIG. 10, in step S11, ballast water treatment apparatus 101 accepts an activation instruction. Specifically, the operator operates the control device 111 or the control device 112. As a result, the control device 111 accepts an activation instruction from the operator directly or via the control device 112.

  In step S <b> 12, the control device 111 confirms the setting of the select switch 123 and determines which of the local (control device 111) and remote (control device 112) commands are valid.

  In step S13, the control device 111 determines whether the setting of the processing mode of the ballast water treatment device 101 is the Ballasting mode or the De-Ballasting mode. When the setting of the select switch 123 is local, the control device 111 determines the processing mode based on the setting of the select switch 125. When the setting of the select switch 123 is remote, the control device 111 determines the processing mode based on a command from the control device 112.

  When the setting of the processing mode of the ballast water treatment apparatus 101 is the Ballasting mode, the process proceeds to step S14. In step S <b> 14, the control device 111 causes the ballast water treatment device 101 to execute a flooding process, that is, a process of acquiring seawater from the sea area and supplying seawater to the ballast tank 5. On the other hand, when the setting of the processing mode of the ballast water treatment apparatus 101 is the De-Ballasting mode, the process proceeds to step S15. In step S <b> 15, the control device 111 causes the ballast water treatment device 101 to perform a drainage process, that is, a process of discharging seawater stored in the ballast tank 5 to the sea area.

  When the ballast water treatment apparatus 101 is executing the flooding process (step S14) or when the ballast water treatment apparatus 101 is executing the drainage process (step S15), the select switch 124 or 125 When the setting is switched, the control device 111 stops the current process.

2. Ballasting Mode FIG. 11 is a flowchart for explaining processing during intake of ballast water according to the embodiment of the present invention. With reference to FIG. 1 and FIG. 11, the ballast water treatment apparatus 101 drives the motor 90 provided in the filtration apparatus 2 in step S101. As a result, the filter 61 rotates.

  In step S102, the control device 111 turns on the UV lamp 142 of the ultraviolet irradiation device 3. In this embodiment, as will be described in detail later, seawater is not passed through the ultraviolet irradiation device 3 when the UV lamp 142 is started up (at the start of lighting). Moreover, the flow of the to-be-processed water in the line 22 has also stopped. The inside of the ultraviolet irradiation device 3 is filled with already purified seawater or fresh water (for example, tap water). Furthermore, when the UV lamp 142 is started up, a process for cleaning the surface of the UV lamp may be executed.

  In step S103, the control device 111 operates the ballast pump BP. Thereby, seawater is introduced into the filtration device 2. Further, the filter of the filtration device 2 is washed with seawater introduced into the filtration device 2. Since this cleaning is different from filtration by a filter, it is referred to as “non-filter cleaning” in this specification. The washed seawater is discharged to the sea through the lines 23 and 24 and the overboard 6.

  In step S104, when the startup (lighting process) of the UV lamp 142 is completed, water is injected into the ballast tank 5. In this case, the water to be treated is filtered by the filtration device 2, further receives the ultraviolet rays from the ultraviolet irradiation device 3, and is sent to the ballast tank 5.

  In step S105, the supply of ballast water to the ballast tank 5 is stopped. For example, when the operator pushes the push button 126 of the control device 111, supply of the ballast water to the ballast tank 5 is stopped. When the supply of the ballast water to the ballast tank 5 is stopped, the UV lamp 142 is lowered (turned off) in the ultraviolet irradiation device 3. Further, in the filtration device 2, the above-described non-filter cleaning is performed.

  In step S106, the filter 61 is backwashed by the backwashing apparatus 2A. When the process of step S106 ends, the entire process ends.

  FIG. 12 is a diagram for explaining the processing of steps S101 to S103 in FIG. Referring to FIG. 12, valves W1 to W11 and valves 41 to 44 are in a closed state. First, the control device 111 opens the valves 41 and 42. Next, the control device 111 starts driving the motor 90 of the filtration device 2 to rotate the filter 61.

  Further, the control device 111 starts to turn on the UV lamp 142 of the ultraviolet irradiation device 3. The control device 111 sets both the valves W2 and W5 to the closed state. Therefore, the inside of the ultraviolet irradiation device 3 is filled with fresh water. In addition, since the ballast pump BP is stopped, the water to be treated does not flow through the line 22. Accordingly, the water to be treated does not pass through the ultraviolet irradiation device 3. That is, in this embodiment, lighting of the UV lamp 142 is started in a state where water remains in the case 141 of the ultraviolet irradiation device 3.

  When the UV lamp 142 is turned on, the UV lamp 142 generates heat. In order to prevent overheating of the UV lamp 142, it is conceivable to cool the UV lamp 142 by passing water through the case 141 of the ultraviolet irradiation device 3. When a path for circulating water for cooling the UV lamp 142 is formed, the configuration of the ballast water treatment apparatus 101 becomes complicated. According to this embodiment, lighting of the UV lamp 142 is started in a state where water is retained in the case 141 of the ultraviolet irradiation device 3. Therefore, a path for circulating water for cooling the UV lamp 142 is not necessary. As a result, the configuration of the ballast water treatment apparatus 101 can be simplified.

  A sufficient amount of water is stored inside the case 141 so that the UV lamp 142 exists in the water. The heat generated when the UV lamp 142 is turned on is transmitted to the water inside the case 141 of the ultraviolet irradiation device 3. Thereby, overheating of the UV lamp 142 can be prevented. Therefore, when the amount of water stored in the case 141 is small, it is not possible to sufficiently obtain the effect of taking away the heat generated in the UV lamp 142 from the UV lamp 142.

  In order to prevent such a problem, the water pressure is measured by the pressure gauges P3 and P4. The control device 111 monitors the water pressure measured by the pressure gauges P3 and P4. The pressure measured by the pressure gauges P3 and P4 reflects the amount of water stored in the ultraviolet irradiation device 3 (case 141). That is, as the amount of water stored in the ultraviolet irradiation device 3 decreases, the water pressure measured by the pressure gauge P4 becomes lower than the water pressure measured by the pressure gauge P3.

  The control device 111 calculates the difference between the water pressures measured by the pressure gauges P3 and P4, and starts turning on the UV lamp 142 when the calculated value is within a predetermined normal range. On the other hand, the control device 111 generates an alarm when the calculated value of the difference between the water pressures measured by the pressure gauges P3 and P4 is out of the normal range (below the lower limit of the normal range). The method for generating an alarm is not particularly limited. For example, the control device 111 can generate an alarm by using a method of turning on a lamp or sounding a buzzer.

  Further, the calculated value based on the water pressure measured by the pressure gauges P3 and P4 is not limited to the difference in water pressure measured by the pressure gauges P3 and P4. For example, the pressure relative to the water pressure measured by the pressure gauge P3 The ratio of the water pressure measured by the meter P4 may be used. In this way, the control device 111 prescribes a normal range for the calculated value based on the water pressure measured by the pressure gauges P3 and P4, and turns on the UV lamp 142 based on the comparison result between the calculated value and the normal range. Let

  Subsequently, the control device 111 opens the valve W1 and starts the ballast pump BP. In one embodiment, a known star delta start method is employed as the start method of the ballast pump BP. According to the star delta starting method, the stator windings of the respective phases of the three-phase motor that drives the pump are star-connected when the three-phase motor is started. On the other hand, when the three-phase motor is rotationally accelerated, the connection of the stator windings of each phase is changed from the star connection to the delta connection.

Furthermore, the control device 111 opens the valve W3. The control device 111 monitors the flow rate measured by the flow meter FM2, and controls the opening degree of the valve W3. For example, the opening degree of the valve W3 is controlled so that the flow rate of the seawater flowing through the line 24 is 300 m ³ / h.

  In the filtration device 2, seawater is introduced through the lines 20 and 21, and the filter 61 is washed without filtration. The seawater after washing the filter 61 is discharged to the sea through the lines 23 and 24 and the overboard 6.

  As described above, in the present embodiment, the filter 61 is washed using the seawater (treated water) introduced into the filtration device 2 while the UV lamp 142 is started up. Since the filter 61 is washed prior to supplying the ballast water to the ballast tank 5, it is possible to prevent the problem that the treatment capacity of the ballast water is reduced. Further, the ballast water can be supplied to the ballast tank 5 immediately after the startup of the UV lamp 142 is completed. In addition, in order to ensure that the cylindrical upper and lower surfaces of the filter 61 are closed with water tightness (preventing idling of the filtration device 2), the water pressure of the filtration device 2 is measured by the pressure gauges P1 and P2. Furthermore, the control device 111 monitors the water pressure measured by the pressure gauges P1 and P2.

  FIG. 13 is a diagram for explaining the process of step S104 of FIG. Referring to FIG. 13, control device 111 determines that startup of UV lamp 142 has been completed. In one embodiment, the control device 111 monitors the illuminance measured by the illuminance sensors 144a to 144c (see FIG. 6). When the measured illuminance reaches the maximum value, the control device 111 determines that the startup of the UV lamp 142 has been completed and opens the bulb W2. As already described with reference to FIG. 3, seawater (treated water) introduced into the filtration device 2 is filtered by permeating from the outer peripheral surface of the filter 61 to the inner peripheral surface of the filter 61. The filtered water to be treated is guided to the filtrate water flow path 64 through a water intake hole 81 provided in the central pipe 80 and sent to the ultraviolet irradiation device 3 through the line 22.

  The controller 111 opens the valve W2 and opens the valve W5. Thereby, the to-be-processed water from the filtration apparatus 2 is introduce | transduced into the case 141 of the ultraviolet irradiation device 3 through the line 22. FIG. In the ultraviolet irradiation device 3, the UV lamp 142 irradiates the water to be treated with ultraviolet rays. The water to be treated after being irradiated with ultraviolet rays flows through the line 26, the line 13 and the line 14, and is supplied to the ballast tank 5.

  Immediately after the illuminance of the UV lamp 142 reaches the maximum value, treatment of the water to be treated by the ultraviolet irradiation device 3 can be started. Therefore, the startup time of the ballast water treatment apparatus 101 can be shortened.

The control device 111 controls the opening degree of the valves W5 and W3, thereby allowing the water to be treated to flow through the filtration device 2, the first route (line 22), the ultraviolet irradiation device 3, and the second route (line 26). The flow rate and the flow rate of the water to be treated flowing through the drainage path (line 23) from the filtration device 2 are controlled. Explaining with a specific example, before opening the valve W5, the flow rate of the seawater flowing through the line 24 is 300 m ³ / h. Controller 111, the flow rate of the seawater flowing through the line 26 is 250 meters ³ / h, and the flow rate of the seawater flowing through the line 24 to set the opening degree of the valve W5, W3 such that the ^{50 m} 3 / h. In addition, these numerical values are examples, and this Embodiment is not limited by these numerical values.

  That is, in the embodiment of the present invention, the flow rate of the water to be treated discharged from the filtration device 2 is controlled by the opening degree of the valve W5 provided in the second path (line 26). The seawater sent out from the ballast pump BP passes through the flooding path, that is, the first path (line 22), the ultraviolet irradiation apparatus 3, and the second path (line 26) from the filtration device 2. A valve for controlling the flow rate of the seawater is provided on the outlet side (line 26) of the ultraviolet irradiation device 3. For this reason, the amount of decrease in the pressure of seawater while seawater passes through the flooded path can be reduced. Furthermore, even if a drain pump is not installed in the line 23, the water can be drained from the filtration device 2 through the line 23. This eliminates the need to install a drain pump on the line 23.

  FIG. 14 is a diagram for explaining the process of step S105 of FIG. Referring to FIG. 14, when the supply of ballast water to ballast tank 5 is completed, control device 111 starts a process for backwashing filter 61 of filtration device 2. Specifically, the control device 111 opens the valve W11 and the valve W6. Part of the seawater filtered by the filtration device 2 passes from the line 22 to the line 31 and is introduced into the washing water tank 68 of the backwashing device 2A. After the filtered seawater is introduced into the washing water tank 68 (for example, after a certain time has elapsed since the valve W6 opened), the control device 111 closes the valve W6 and further closes the valve W11. When the water level in the washing water tank 68 has already reached a predetermined level, the process for introducing the filtered seawater into the washing water tank 68 can be omitted.

Next, the UV lamp 142 is lowered (turns off), and the filter 61 of the filtration device 2 is washed without filtration. The control device 111 closes the valves W2 and W5 and controls the opening degree of the valve W3. For example, the opening degree of the valve W3 is controlled so that the flow rate of seawater flowing through the line 24 is changed from 50 m ³ / h to 300 m ³ / h. On the other hand, the opening degree of the valve W5 is controlled so that the flow rate of the seawater flowing through the line 26 is from 250 m ³ / h to 0 m ³ / h.

  When the ship moves while the turbidity remains attached to the filter 61, the turbidity attached to the filter 61 may be washed at the port of call of the ship and discharged to the sea area of the port of call of the ship. Microorganisms contained in the turbidity may affect the marine ecosystem of the ship's port of call. By washing the filter 61 after supplying the ballast water to the ballast tank 5, it is possible to prevent the ship from moving while the turbidity remains attached to the filter 61.

  As with the startup of the UV lamp 142, when the UV lamp 142 is lowered, water does not pass through the case 141 of the ultraviolet irradiation device 3. That is, water stays inside the case 141. Since the water for cooling the UV lamp 142 is not circulated even when the UV lamp 142 is lowered, a path for circulating the water for cooling the UV lamp 142 becomes unnecessary. Therefore, the configuration of the ballast water treatment apparatus 101 can be simplified.

  FIG. 15 is a first diagram for explaining the process (back cleaning) in step S106 of FIG. Referring to FIG. 15, control device 111 sets valves W9 and W6 to an open state, and sets the other valves to a closed state. The case 63 (see FIG. 3) of the filtration device 2 and the washing water tank 68 are connected by the line 22 and all the other flow paths are closed. Compressed air is supplied from the compressed air supply unit 32 to the washing water tank 68 through the line 28. For example, the washing water is pressurized to about 0.4 MPa to 0.5 MPa. As a result, the entire interior of the case 63, the line 22 and the washing water tank 68 of the filtration device 2 is maintained in a pressurized state.

  FIG. 16 is a second diagram for explaining the process (back cleaning) in step S106 of FIG. Referring to FIG. 16, control device 111 opens valve W7. Then, the cleaning water passes through the filter 22 from the cleaning water tank 68 through the line 22. This pre-purified water is discharged from the case 63 (see FIG. 3) of the filtration device 2 to the outside of the filtration device 2 at a stretch. That is, the wash water flows in a short time with respect to the filter 61 in the direction opposite to the direction of the water flow when filtering. The washing water flows through the filtered water flow path 64 and is ejected from the water intake hole 81 of the central pipe 80. This washing water passes through the filter 61 from the inner peripheral surface of the filter 61 toward the outer peripheral surface of the filter 61. Thereby, the substance adhering to the outer peripheral surface of the filter 61 is peeled off from the outer peripheral surface of the filter 61, and the filter 61 is wash | cleaned. Thereafter, the wash water passes through the lines 23, 25, and 24 and is discharged from the overboard 6 to the sea.

  FIG. 17 is a third diagram for explaining the process (back washing) in step S106 of FIG. Referring to FIG. 17, control device 111 sets both valves W10 and W11 to the open state. The fresh water is supplied from the fresh water supply unit 33 to the wash water tank 68 via the line 30 until the water level in the wash water tank 68 reaches a predetermined level.

  Note that the back cleaning process described with reference to FIGS. 15 to 17 may be executed only once or may be executed repeatedly. The number of repetitions is not particularly limited.

  Further, the motor 90 may be stopped during the cleaning operation. However, it is preferable to perform reverse cleaning of the filter 61 while the filter 61 is rotated because a higher cleaning effect can be obtained. This is because the centrifugal force due to the rotation of the cylinder is applied to the substance adhering to the outer peripheral surface of the cylindrical and pleated filter 61 in addition to the pressure of the washing water from the inside of the cylinder, so that the filtrate is more easily removed. It is to become. Thus, the filter 61 can be effectively cleaned by performing the reverse cleaning of the filter 61 in the rotating state. Furthermore, even if the vibration of the entire filter 61 is applied to the rotation, it can be expected that the cleaning effect of the filter 61 is enhanced.

3. Processing in BWMS mode (De-Ballasting mode)
FIG. 18 is a flowchart for explaining processing when draining ballast water according to the embodiment of the present invention. With reference to FIG. 1 and FIG. 18, the ballast water treatment apparatus 101 lights the UV lamp 142 of the ultraviolet irradiation device 3 in step S201. In other words, the UV lamp 142 is turned on before the water to be treated is taken out from the ballast tank 5 and supplied to the ultraviolet irradiation device 3.

  Similar to the processing in the Ballasting mode, seawater is not passed through the ultraviolet irradiation device 3 when the UV lamp 142 is started up. Specifically, the control device 111 sets the valve W4 and the valve W5 to a closed state. Further, the control device 111 stops the ballast pump BP. Thereby, the flow of to-be-processed water does not generate | occur | produce in the line 27. FIG. According to this method, a path for circulating water for cooling the UV lamp 142 becomes unnecessary. Therefore, the configuration of the ballast water treatment device can be further simplified.

  In step S202, the operation of the ballast pump BP is started. In step S203, drainage from the ballast tank 5 is performed.

  As described above, when the ballast water is taken, the ballast water is irradiated with ultraviolet rays to kill microorganisms. However, it is possible that the microorganisms in the water could not be completely killed when the ballast water was taken. In this embodiment, once the ballast water is irradiated with ultraviolet rays, the ballast water is discharged to the sea. Thereby, the effect which prevents the ballast water discharged | emitted by the sea from affecting the ecosystem of a sea area is heightened more.

  In addition, the big foreign material is removed from the to-be-processed water by filtering the to-be-processed water at the time of water intake. Therefore, in this embodiment, the filtration process is omitted when the ballast water is drained.

  In step S <b> 204, the ballast water treatment apparatus 101 performs a fall process. In step S205, the ballast water treatment apparatus 101 stops. This completes the process.

  FIG. 19 is a diagram for explaining the processing of steps S202 to S204 in FIG. Referring to FIG. 19, startup of UV lamp 142 is completed in ultraviolet irradiation device 3. The control device 111 sets the valves 43 and 44 and the valves W4 and W5 to the open state, and starts driving the ballast pump BP (step S202).

  Ballast water stored in the ballast tank 5 passes through the line 16, the line 11, the line 12, the line 20, the line 27, the line 22, the line 26, the line 13, and the line 15 and is discharged from the overboard 6 to the sea. .

  During a predetermined period (for example, several seconds) from the start of driving of the ballast pump BP, the flow rate of the discharged ballast water is controlled to the first flow rate. When the predetermined period has elapsed, the flow rate of the discharged ballast water is controlled to the second flow rate. The second flow rate is greater than the first flow rate. The flow rate of the ballast water is controlled by the opening degree of the valve W5 (the valve W4 is completely open). Alternatively, the flow rate of the ballast water may be controlled by the opening degree of the valve W4 (the valve W5 is fully open). Or the flow volume of ballast water may be controlled by the opening degree of both valves W4 and W5. In any case, the control device 111 controls the openings of the valves W4 and W5 so that the flow rate of the water to be treated passing through the case 141 of the ultraviolet irradiation device 3 becomes the first flow rate. , W5 is opened. Next, the control device 111 controls the valves W4 and W5 so that the flow rate of the water to be treated that passes through the case 141 of the ultraviolet irradiation device 3 becomes a second flow rate that is larger than the first flow rate.

  If the amount of drainage at the start of driving the ballast pump BP is too large, a water hammer (water hammer action) may occur. For example, the UV lamp 142 may be damaged by the water hammer.

  As described above, the ballast pump BP is started, for example, according to the star delta start method. In the star delta starting method, for example, immediately after the start of the ballast pump BP, the discharge amount of the ballast pump BP is small (for example, 30% of the capacity of the ballast pump BP). It changes rapidly to 100%. Therefore, the flow rate of ballast water is likely to change rapidly.

  In this embodiment, when draining from the ballast tank 5, seawater is sent from the ballast pump BP to the ultraviolet irradiation device 3 without passing through the filter 61 of the filtration device 2. The ultraviolet irradiation device 3 is easily affected by a change in the flow rate of seawater accompanying a rapid increase in the discharge amount of the ballast pump BP. That is, the ultraviolet irradiation device 3 is easily affected by the water hammer. In this embodiment, the possibility of a water hammer can be reduced by setting the flow rate of ballast water discharged for a predetermined period (for example, several seconds) from the start of driving of the ballast pump BP.

As described above, the control device 111 limits the flow rate of the ballast water in the line 26 by controlling the opening of the valve W5, for example. For example, when the discharge amount corresponding to 100% of the capacity of the ballast pump BP is 300 m ³ / h, the opening degree of the valve W5 is controlled so that the flow rate of the ballast water in the line 26 becomes 100 m ³ / h. These numerical values are examples, and the present invention is not limited to these numerical values.

Next, the control device 111 increases the opening degree of the valve W5. For example, in step S203, the control device 111 sets the flow rate of the ballast water in the line 26 to 250 m ³ / h.

Next, a process for lowering the UV lamp 142 will be described. The control device 111 controls the opening degree of the valve W5 so that ballast water flows through the line 26 at a low flow rate. Therefore, in step S204, the valve W5 is not completely closed. For example, the opening degree of the valve W5 is controlled so that the flow rate of the ballast water in the line 26 decreases from 250 m ³ / h to 100 m ³ / h.

If the flow of the ballast water is suddenly stopped (the flow rate is changed discontinuously from 250 m ³ / h to 0 m ³ / h), the possibility of the above-described water hammer problem increases. Therefore, the control device 111 temporarily lowers the flow rate of the ballast water, and then stops the valve W5 and / or stops the ballast pump BP. Further, the control device 111 turns off the UV lamp 142 of the ultraviolet irradiation device 3. Thereby, the ballast water treatment apparatus 101 is completely stopped (step S206).

  After that, the ballast water stored in each of the filtering device 2 and the ultraviolet irradiation device 3 is replaced with fresh water. This replacement process may be performed automatically or manually.

In the above-described embodiment, the flow rate of the line 26 is set to a single flow rate (100 m ³ / h) between 0 m ³ / h and the maximum flow rate (250 m ³ / h). However, in order to reduce the amount of change in the flow rate of the line 26, a plurality of stages of flow rates may be set between 0 and the maximum flow rate (250 m ³ / h). By reducing the amount of change in the flow rate of the line 26, the possibility of the water hammer problem occurring can be reduced.

  Furthermore, the starting method of the ballast pump BP is not limited to the star delta starting method. As shown in FIG. 20, the ballast pump BP may be driven by an inverter 51. In this case, even if the valve W5 is completely opened, the flow rate of the ballast water in the line 26 can be continuously changed by continuously changing the discharge amount of the ballast pump BP. Further, in order to change the flow rate of the ballast water in the line 26, a change in the discharge amount of the ballast pump BP and a change in the opening degree of the valve W5 may be combined. These methods can also reduce the possibility of the water hammer problem occurring. Therefore, it is advantageous for protection of the UV lamp 142.

4). Treatment in bypass mode (ballast water intake)
In the bypass mode, the ballast water is taken and discharged without going through the ballast water treatment apparatus 101. FIG. 21 is a view for explaining intake of ballast water in the bypass mode. Referring to FIG. 21, control device 111 sets valve 41, valve W8 and valve 42 to the open state, and sets the other valves to the closed state. Furthermore, the control device 111 drives the ballast pump BP.

  Seawater passes through lines 10 and 11 and is pumped by a ballast pump BP. Seawater discharged from the ballast pump BP passes through the lines 12, 13 and 14 and is sent to the ballast tank 5.

5. Treatment in bypass mode (ballast water drainage)
FIG. 22 is a view for explaining drainage of ballast water in the bypass mode. Referring to FIG. 22, control device 111 sets valves 43 and 44 to an open state and sets other valves to a closed state. Furthermore, the control device 111 drives the ballast pump BP.

  Seawater passes through line 14, line 16, line 11, line 12, line 13 and line 15 in this order from the ballast tank 5 and is discharged from the overboard 6 to the sea.

  In the above-described embodiment, the non-filter cleaning and the reverse cleaning by the back cleaning device 2A are disclosed as the cleaning method of the filter 61 of the filtering device 2. In addition to these methods, a method of cleaning the filter 61 using a chemical solution may be employed. As shown in FIG. 3, a chemical solution inlet 70 is provided in the lid portion of the case 63. By performing the reverse cleaning of the filter 61, the filtration device 2 can be operated for a long period of time. However, there may be a substance that cannot be removed by such mechanical cleaning and gradually accumulates on the surface of the filter 61. The combined use of cleaning with a chemical solution can extend the life of the filter 61.

  Using such a chemical liquid inlet, chemical liquid cleaning can be performed by the following procedure. First, the filtration operation and the back washing operation are stopped. The filter 61 may be stopped or rotated. The treated water or filtered water remains inside the case 63 and the filter 61 is maintained in a state immersed in water. In this state, a cleaning chemical solution is injected from the chemical solution injection port 70.

  When the filter 61 is already in the rotating state, the rotating state is maintained as it is. On the other hand, when the filter 61 is in the stopped state, the filter 61 is rotated by rotating the motor 90. This state is maintained for a predetermined time until the chemical solution spreads over the entire rotating filter 61 and the outer peripheral surface of the filter 61 is sufficiently cleaned. Thereafter, the valve W3 is opened, and the water (including the chemical solution) inside the case 63 is drained. In addition, according to the chemical | medical solution to be used, neutralization liquid may be further inject | poured before waste_water | drain, or processing, such as neutralization, may be performed after waste_water | drain.

  Moreover, in said embodiment, the ballast water treatment apparatus 101 is provided with 2 A of backwashing apparatuses. However, the backwashing device 2 </ b> A does not have to be an essential configuration for the ballast water treatment device 101. You may abbreviate | omit the back washing | cleaning apparatus 2A from the structure shown by said embodiment.

  The embodiment disclosed this time must be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Sea chest, 2 Filtration apparatus, 2A Back washing apparatus, 3 Ultraviolet irradiation apparatus, 5 Ballast tank, 6 Overboard, 10-16, 20-31 line, 32 Compressed air supply part, 33 Fresh water supply part, 41-44, W1 to W11 valve, 51 inverter, 61 filter, 62 treated water nozzle, 63, 141 case, 64 filtered water flow path, 65 discharge flow path, 66 treated water flow path, 67 nozzle port, 68 wash water tank, 70 chemical injection Inlet, 71 Outer cylinder, 72 Lid, 73 Bottom, 80 Center piping, 81 Water intake hole, 90 Motor, 91 Motor cover, 100 Ballast water management system, 101 Ballast water treatment device, 102 Bypass system, 111, 112 Control device 120 lamp group, 120a to 120e lamp, 122, 126 to 130 lamp Gerhard button, 123 to 125 select switch, 142 UV lamp, 143 lamp power supply, 144A～144c illuminance sensor, BP ballast pumps, C axis, FM1, FM2 flowmeter, P1 to P4, PS pressure gauge.

Claims (9)

A filtration device having a filter for filtering the water to be treated;
An ultraviolet irradiation device having a case formed so that the water to be treated passes, and an ultraviolet lamp that is accommodated in the case and irradiates the water to be treated with ultraviolet rays;
A first path for supplying the treated water from the filtration device to the case of the ultraviolet irradiation device;
A second path for supplying the treated water that has passed through the case of the ultraviolet irradiation device to a ballast tank;
A first valve provided in the first path;
A second valve provided in the second path;
Prior to the supply of the water to be treated to the ballast tank, a process for turning on the ultraviolet lamp is performed, and the water to be treated is not passed through the first path until the lighting of the ultraviolet lamp is completed. And a control device for keeping the first and second valves closed ;
A first pressure gauge that is provided on the inlet side of the water to be treated in the case of the ultraviolet irradiation device and measures the water pressure on the inlet side;
A second pressure gauge that is provided on the outlet side of the water to be treated in the case of the ultraviolet irradiation device and measures the water pressure on the outlet side;
The control device is configured to detect the ultraviolet ray when an operation value based on a pressure value measured by the first pressure gauge and a pressure value measured by the second pressure gauge is within a predetermined normal range. Ballast water treatment device that turns on the lamp . The ultraviolet irradiation device includes an illuminance sensor for detecting the illuminance of the ultraviolet lamp,
When the illuminance of the ultraviolet lamp detected by the illuminance sensor reaches a maximum value, the control device sets the first and second valves to an open state, and the treated water from the filtration device. The ballast water treatment device according to claim 1, wherein the water is passed through the case of the ultraviolet irradiation device through the first path. Wherein the controller, when the to the ballast tank is supplied treated water ends and turns off the UV lamp the first and second valve while maintaining the closed state, according to claim 1 or claim ballast water treatment system according to 2. The ballast water treatment device according to claim 3 , wherein, when the ultraviolet lamp is turned off, the filtration device cleans the filter with water to be treated introduced into the filtration device. The ballast water treatment device according to claim 4 , wherein when the ultraviolet lamp is turned on, the filtration device cleans the filter using water to be treated introduced into the filtration device. The ballast water treatment device is
The ballast water treatment device according to claim 4 , further comprising a back washing device that supplies washing water for washing the filter to the filtration device through the first path after washing the filter with the treated water. . The ballast water treatment device is
A third path for supplying the treated water stored in the ballast tank to the ultraviolet irradiation device;
A third valve provided in the third path,
The control device turns on the ultraviolet lamp in a state where the second and third valves are kept closed prior to the supply of the water to be treated from the ballast tank to the ultraviolet irradiation device. The ballast water treatment apparatus according to any one of claims 1 to 6 . The controller is
When the supply of the water to be treated from the ballast tank to the ultraviolet irradiation device is started, the flow rate of the water to be treated that passes through the case of the ultraviolet irradiation device becomes the first flow rate. And then controlling the second and third valves so that the flow rate of the water to be treated passing through the case becomes a second flow rate larger than the first flow rate. Item 8. The ballast water treatment device according to Item 7 . The control device, when ending the supply of the water to be treated from the ballast tank to the ultraviolet irradiation device, causes the second flow rate of the water to be treated to pass through the case of the ultraviolet irradiation device to be reduced. The ballast water treatment apparatus according to claim 7 or 8 , wherein the second and third valves are closed by controlling the third valve and the third valve.

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