JP4351707B2 - Activation control system for ballast water treatment equipment - Google Patents

Description

  The present invention relates to a startup control system for a ballast water treatment apparatus, and more specifically, it is activated so that ozone of a predetermined concentration can be mixed with ballast water constantly and effectively, and aquatic organisms and bacteria in the ballast water can be effectively used. The present invention relates to a start-up control system for a ballast water treatment apparatus that can be killed or removed.

  A cargo ship that transports crude oil or containers is provided with a ballast tank in order to maintain the stability of the hull during navigation. Normally, when crude oil is not loaded, the ballast tank is filled with ballast water, and the ballast water is discharged when loading crude oil, containers, etc., thereby adjusting the buoyancy of the hull and stabilizing the hull. .

  As described above, the ballast water is water necessary for the safe navigation of the ship, and the seawater of the port that performs cargo handling is usually used. The amount is estimated to be 3-4 billion tons per year worldwide.

  By the way, aquatic organisms and bacteria living in the port where the water is taken are mixed in the ballast water, and these aquatic organisms and bacteria are simultaneously transported to foreign countries as the ship moves.

  Therefore, the destruction of ecosystems, such as the replacement of existing species with species that did not originally live in the sea, has become serious.

  Against this background, a convention for the regulation and management of ship ballast water and sediment (hereinafter referred to as the Convention) was adopted at the diplomatic meeting of the International Maritime Organization (IMO), and the ballast water treatment device was used. The obligation to carry out ballast water management is expected to be applied from 2009 onwards.

  In addition, the discharge standards for ballast water are defined by the Convention as shown in Table 1 below.

  In view of the above background, there is an urgent need to develop ballast water treatment technology that can solve the above-described problems.

  Conventionally, as a method for physically treating ballast water containing aquatic organisms and bacteria, Patent Document 1 discloses a technique for sterilization or sterilization by injecting ozone gas into ballast water.

Patent Documents 2 and 3 disclose techniques for controlling the ozone concentration of ozone water.
JP 2004-160437 A Japanese Patent Laid-Open No. 6-134023 JP 2005-161284 A

  When ballast water is treated using ozone, it is necessary to set the ozone concentration of the ballast water to an ozone concentration necessary for killing or removing aquatic organisms and bacteria.

  If the ozone concentration in the ballast water is too low, aquatic organisms and bacteria that could not be treated and survived in the ballast water may flow into the sea when the ballast water is discharged, destroying the ecosystem in that area. Therefore, according to the above-mentioned treaty, it becomes impossible to discharge ballast water, and it is impossible to load cargoes such as crude oil and containers, as well as to leave, and there is a problem that it is a great loss for shipping companies. In particular, the fact that ships that transport cargo essential to daily life, such as crude oil, cannot sail can have a serious impact on society as a whole.

  However, even if the ozone generator is activated to treat the ballast water and the generated ozone is mixed into the ballast water, it is not always possible to generate ozone at the required concentration from the beginning of the operation. There is concern that aquatic organisms and bacteria cannot be killed or removed without reaching ozone concentration.

  Therefore, the present invention activates a treatment apparatus for treating ballast water with ozone so that ozone of a predetermined concentration can be mixed stably with the ballast water, thereby aquatic organisms and bacteria in the ballast water can be obtained. It is an object of the present invention to provide a start-up control system for a ballast water treatment device that can be effectively killed or removed.

  Other problems of the present invention will become apparent from the following description.

  The above problems are solved by the following inventions.

(Claim 1)
An activation control system for a ballast water treatment device installed in a ship,
The ballast water treatment device includes a ballast pump that transfers ballast water to a ballast tank via a ballast water system pipe, an ozone mixing device that mixes ozone generated by the ozone generator into the ballast water, aquatic organisms in the ballast water, A slit plate having a plurality of slit-like openings for destroying bacteria by shearing force;
It has an ozone concentration detection unit for detecting the ozone concentration generated by the ozone generator, inputs the ozone concentration obtained by the ozone concentration detection unit, and determines whether or not the input ozone concentration reaches a specified concentration When the specified concentration has not been reached, the ballast pump is stopped, and control is performed so as not to supply ozone to the ozone mixing device, and when the specified concentration has been reached, the operation of the ballast pump is started. start control system of the ballast water treatment apparatus characterized by comprising a control unit that starts the intake of the ballast water, it performs control to supply ozone to the ozone supply device.

(Claim 2)
2. The ballast water treatment apparatus start-up control system according to claim 1, wherein the control unit performs control to send ozone that is not supplied to the ozone mixing device to a waste ozone decomposition tower, decompose and discharge the ozone to the outside. .

(Claim 3)
An activation control system for a ballast water treatment device installed in a ship,
The ballast water treatment device includes a ballast pump that transfers ballast water to a ballast tank via a ballast water system pipe, an ozone mixing device that mixes ozone generated by the ozone generator into the ballast water, aquatic organisms in the ballast water, A slit plate having a plurality of slit-like openings for destroying bacteria by shearing force;
An ozone concentration detector (II) that detects the ozone concentration in the ballast water from the ozone mixing device to the slit plate is provided in the ozone supply line with an ozone concentration detector (I) that detects the ozone concentration generated by the ozone generator. Provided,
The ozone concentration obtained by the ozone concentration detector (I) is input, and it is determined whether or not the input ozone concentration has reached a specified concentration. If the ozone concentration has reached a specified concentration, ozone is supplied to the ozone mixing device. Control to supply, if the specified concentration has not been reached, perform control not to supply ozone to the ozone mixing device,
The ozone concentration obtained by the ozone concentration detector (II) is input, and it is determined whether or not the input ozone concentration has reached a specified concentration. An activation control system for a ballast water treatment apparatus, comprising a control unit that performs control to return water to a line on the inlet side of the ballast pump before the ozone mixing apparatus without sending water to the ballast tank.

(Claim 4)
An activation control system for a ballast water treatment device installed in a ship,
The ballast water treatment device includes a ballast pump that transfers ballast water to a ballast tank via a ballast water system pipe, an ozone mixing device that mixes ozone generated by the ozone generator into the ballast water, aquatic organisms in the ballast water, A slit plate having a plurality of slit-like openings for destroying bacteria by shearing force;
An ozone concentration detector (I) for detecting the ozone concentration generated by the ozone generator is provided in the ozone supply line,
The ozone concentration obtained by the ozone concentration detector (I) is input, and it is determined whether or not the input ozone concentration has reached a specified concentration. If the ozone concentration has reached a specified concentration, ozone is supplied to the ozone mixing device. Control to supply, if the specified concentration has not been reached, perform control not to supply ozone to the ozone mixing device,
And after supplying ozone to the ozone mixing device, the ballast water after the ozone mixing device is not sent to the ballast tank until a specified time elapses, but before the ozone mixing device and on the inlet side of the ballast pump A start control system for a ballast water treatment apparatus, comprising a control unit that performs control for returning to the ballast water treatment apparatus.

(Claim 5)
The ballast water treatment apparatus according to any one of claims 1 to 4, wherein ballast water mixed with ozone by the ozone mixing device is passed through the slit plate having a plurality of slit-shaped openings. system.

  According to the present invention, an aquatic organism and bacteria in ballast water are activated by activating a treatment apparatus for treating ballast water with ozone so that ozone of a predetermined concentration can be mixed with ballast water at all times. It is possible to provide a start-up control system for a ballast water treatment apparatus that can effectively kill or remove the water.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Drawing 1 is a schematic structure figure showing a 1st embodiment of ballast water system piping which has a ballast water treatment device. In the figure, 1 is a hull, 2 is a ballast tank provided in the hull 1, 3 is a main pipe for transferring (injecting) ballast water to the ballast tank 2, 4 is a ballast pump for taking in ballast water, and 5 is ozone. The ozone generator 6 generates ozone, the ozone supply line 6 supplies ozone generated by the ozone generator 5, the ozone mixing device 7 mixes the ozone generated by the ozone generator 5 into the ballast water, and 8 the ballast water. A slit plate for destroying the aquatic organisms and bacteria by shearing force, 9 an exhaust ozone decomposing tower for decomposing exhaust ozone, 10 an exhaust ozone line for transferring exhaust ozone to the exhaust ozone decomposing tower 9, 11 is an ozone concentration detector for detecting the ozone concentration generated by the ozone generator 5, 12 is an on-off valve provided in the ozone supply line 6, and 13 is an exhaust ozone line 1. Off valve provided on, 14 enter the detection result of the ozone concentration detection unit 11, a ballast pump 4, it is an on-off valve 12, 13 a control unit which controls, respectively.

  In FIG. 1, only one ballast tank 2 is shown. Usually, a plurality of ballast tanks 2 are provided in the hull 1, and ballast water is transferred into each ballast tank 2 by a main pipe 3. .

  Ballast water is taken into the ballast tank 2 by the operation of the ballast pump 4 from a sea chest (not shown) provided near the bottom of the ship. In the present invention, for example, seawater or fresh water is used as the ballast water to be treated by the ballast water treatment apparatus, and seawater is preferably used in the present invention. Such ballast water includes aquatic organisms such as zooplankton, phytoplankton and microorganisms, and bacteria such as Escherichia coli.

  Ballast water taken by the ballast pump 4 is transferred to the ballast tank 2 through the main pipe 3. In the middle of the main pipe 3, ozone is injected by the ballast water treatment device, and the ballast water is treated.

  The ozone mixing device 7 mixes the ozone generated by the ozone generator 5 into the ballast water taken by the ballast pump 4.

  The ozone generator 5 includes a compressor 51, an oxygen generator 52, and an ozone generator 53, and the ozone generated through the oxygen generator 52 and the ozone generator 53 passes through the ozone supply line 6 by the compressor 51. And supplied to the ozone mixing device 7.

  This ozone mixing device 7 shows an example using a gas-liquid mixing device (ozone injector) for gas-liquid mixing ballast water transferred through the main pipe 3 and ozone or a mixed gas of ozone and oxygen. There is no particular limitation as long as ozone having a predetermined concentration can be mixed in water. For example, a static mixer such as a static mixer or a line mixer can be used.

  The slit plate 8 destroys aquatic organisms and bacteria in the ballast water by shearing force by allowing the ozone mixing device 7 to pass the ballast water mixed with ozone at a high pressure.

  Details of the slit plate 8 are shown in FIGS.

  2 is a cross-sectional view showing the slit plate 8 in the main pipe 3, and FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. As shown in FIG. The main pipe 3 is disposed so as to block the entire flow path.

  A plurality of slit-shaped openings 81 are formed in the slit plate 8. The opening width of the opening 81 is set to a width that can sufficiently exhibit the effect of destroying aquatic organisms and bacteria in the ballast water by a shearing force, and is preferably 200 μm to 500 μm.

  Ballast water transferred through the main pipe 3 is pumped by the ballast pump 4 toward the slit plate 8 at a high pressure. The pumped ballast water tries to pass through the slit-like opening 81 of the slit plate 8 in a turbulent state, and a shear phenomenon occurs when passing through the opening 81, thereby destroying aquatic organisms and bacteria in the ballast water. And killed.

  In order to exhibit the effect of destruction and killing by the shearing force, the slit plate 8 is preferably attached in a direction orthogonal to the flow direction of the ballast water.

  Although the slit plate 8 is attached intimately in the main pipe 3, it is preferably interposed in the main pipe 3 by a flange or the like so that it can be easily removed and cleaned, although not shown.

  The shape of the plurality of slit-shaped openings 81 formed in the slit plate 8 is preferably a long and narrow rectangular shape as illustrated in FIG. The number of openings 81 is not particularly limited, and is appropriately set according to the pressure loss of ballast water and the occurrence of shearing phenomenon.

  Each opening 81 may be formed to have the same length as shown in FIG. 3, but the opening 81 at the center is long and the opening 81 is shortened toward the end in accordance with the cross-sectional shape of the main pipe 3. May be.

  Further, the shape of each opening 81 is not limited to a linear shape, and may be formed in a curved shape such as an arc shape.

  Furthermore, the number of slit plates 8 provided in the main pipe 3 is not limited to one, and a plurality of slit plates 8 may be provided at intervals. When a plurality of slit plates 8 are provided, it is preferable that the width, size, number, and shape of the respective openings 81 of the slit plates 8 are different. Thereby, a shear phenomenon can be exhibited more effectively and the destruction and killing effects of aquatic organisms and bacteria in the ballast water can be further improved.

  In this manner, aquatic organisms and bacteria in the ballast water transferred through the main pipe 3 are removed or killed by the ozone mixture in the ballast water by the ballast water treatment device and the shearing force by the slit plate 8.

  The exhaust ozone decomposition tower 9 receives exhaust ozone unnecessary for ballast water treatment from the exhaust ozone line 10 and decomposes it. The treated gas decomposed by the exhaust ozone decomposition tower 9 is discharged into the atmosphere from the deck of the hull 1.

  The ozone concentration detection unit 11 has an ozone concentration meter that detects the ozone concentration generated by the ozone generator 5. Here, the ozone concentration is detected in the ozone supply line 6 for supplying the ozone generated by the ozone generator 5 to the ozone mixer 7, but the ozone concentration detector 11 is placed in the ozone generator 5. By incorporating, the ozone concentration immediately after being generated by the ozone generator 53 of the ozone generator 5 may be detected.

  The control unit 14 receives the ozone concentration (gas concentration) detection signal sent from the ozone concentration detection unit 11, and the ozone concentration generated by the ozone generator 5 is the specified concentration necessary for processing the ballast water. It is judged whether it has reached. And the control part 14 controls the opening / closing of the on-off valve 12 in the ozone supply line 6 and the on-off valve 13 in the exhaust ozone line 10 according to the determination result of the ozone concentration. .

  The specified concentration of ozone concentration (gas concentration) varies depending on the raw material (air, oxygen gas, etc.) for generating ozone, but can be selected from 3 to 15%, for example.

  Next, start control of the ballast water treatment apparatus in the first embodiment will be described using the flowchart of FIG.

  The activation of the ballast water treatment device is started when the ballast water is taken into the ballast tank 2.

  Now, the ballast pump 4 is in an operation stop state. When the ballast water is taken in by the ballast pump 4, the start of the ozone generator 5 is started, and the generation of ozone is started by driving the compressor 51, the oxygen generator 52 and the ozone generator 53 (S1). .

  However, at the beginning of the activation of the ozone generator 5, the amount of ozone generated has not yet reached a sufficient level. Even if this is supplied to the ozone mixer 7 and mixed with the ballast water, aquatic organisms in the ballast water It is not possible to produce ballast water with sufficient ozone concentration to kill bacteria and bacteria.

  The control unit 14 continues to monitor the ozone concentration detection signal sent from the ozone concentration detection unit 11 immediately after the start of the activation of the ozone generator 5, and the ozone concentration (gas concentration) is a regulation necessary for processing the ballast water. It is determined whether or not the concentration has been reached (S2).

  As a result, since the ozone concentration has not yet reached the prescribed concentration at the beginning of the activation of the ozone generator 5, the control unit 14 closes the on-off valve 12 provided in the ozone supply line 6 and closes the ozone mixing device 7. Prevent ozone from being supplied to the tank. Here, preferably, in order to process low-concentration ozone, the on-off valve 13 provided in the exhaust ozone line 10 is opened, and the low-concentration ozone is transferred to the exhaust ozone decomposition tower 9 for decomposition. (S3).

  This ozone transfer control to the exhaust ozone decomposition tower 9 is continued until the detection result of the ozone concentration detector 11 exceeds the specified concentration.

  The ozone concentration generated by the ozone generator 5 after a predetermined time has reached a level sufficient to kill aquatic organisms and bacteria in the ballast water, and the detection result of the ozone concentration detection unit 11 is the specified concentration. In response to the detection result, the control unit 14 starts the operation of the ballast pump 4 and starts to take in the ballast water (S4).

  The ballast water taken by the ballast pump 4 eventually passes through the ozone mixing device 7 through the main pipe 3. After starting the operation of the ballast pump 4, the control unit 14 opens the open / close valve 12 in the ozone supply line 6 and closes the open / close valve 13 in the exhaust ozone line 10. As a result, ozone having a sufficient ozone concentration is supplied to the ozone mixing device 7 via the ozone supply line 6 and mixed into the ballast water in the main pipe 3 (S5).

  By mixing the ballast water and ozone in the ozone mixing device 7, most of aquatic organisms and bacteria in the ballast water are killed by the sterilizing action of ozone.

  In addition, since the ballast water mixed with ozone of a predetermined concentration through the ozone mixing device 7 passes through the opening 81 of the slit plate 8 next, aquatic organisms and bacteria remaining in the ballast water pass through the opening 81. It is further destroyed and killed by the shearing force that is generated.

  The mixing of ozone into the ballast water by the ozone mixing device 7 continues until the ballast water is taken in by the operation of the ballast pump 4 and the ballast tank 2 is full (S6).

  Eventually, when the ballast tank 2 becomes full, the operation of the ballast water treatment device is stopped. Here, the control unit 14 stops the operation of the ballast pump 4 (S7), then stops the ozone generator 5 and ends the ballast water treatment (S8).

  Thus, according to the first embodiment, the ozone concentration (gas concentration) generated by the ozone generator 5 does not reach the specified concentration, and is still sufficient to kill aquatic organisms and bacteria in the ballast water. When the level has not been reached, control is performed so that ozone is not supplied to the ozone mixing device 7, so that insufficiently low-concentration ozone is not mixed in the ballast water, and the ozone mixing device 7 is always stable against the ballast water. Thus, ozone with a predetermined concentration can be mixed. Thereby, aquatic organisms and bacteria in the ballast water can be effectively killed or removed, and ballast water satisfying the IMO standard can be stored in the ballast tank 2.

  Drawing 5 is a schematic structure figure showing a 2nd embodiment of ballast water system piping which has a ballast water treatment device. The same reference numerals as those in FIG. 1 denote the same components, and detailed description thereof will be omitted.

  In the second embodiment, in addition to the ozone concentration detector 11 provided in the ozone supply line 6, the ozone concentration (liquid) in the ballast water transferred through the main pipe 3 extending from the ozone mixing device 7 to the slit plate 8. An ozone concentration detection unit 15 that detects medium concentration) is provided. The former ozone concentration detector 11 is the ozone concentration detector (I) in the present invention, and the latter ozone concentration detector 15 is the ozone concentration detector (II) in the present invention.

  The main pipe 3 is provided with a return line 16 that branches from between the ozone concentration detector 15 and the slit plate 8 and is connected to the primary side (inlet side) of the ballast pump 4. On-off valves 17 and 18 are respectively provided in the main pipe 3 and the return line 16 between the branched portion of the gas and the slit plate 8.

  Here, in the second embodiment, the control unit 14 further inputs a detection signal of ozone concentration (liquid concentration) sent from the ozone concentration detection unit 15, and the input ozone concentration becomes a predetermined concentration. It is judged whether it has reached.

  The specified concentration of ozone concentration (concentration in liquid) varies depending on the performance of the ozone mixing device 7, but can be selected from 0.5 to 5 ppm, for example.

  Then, the control unit 14 controls whether or not the ballast pump 4 can be started and whether the on-off valves 12, 13, 17, and 18 are opened or closed according to the determination results of the ozone concentration by the ozone concentration detection units 11 and 15.

  Next, start control of the ballast water treatment apparatus in the second embodiment will be described using the flowchart of FIG.

  The activation of the ballast water treatment device is started when the ballast water is taken into the ballast tank 2.

  Now, the ballast pump 4 is in an operation stop state. When the ballast water is taken in by the ballast pump 4, first, the ozone generator 5 is started, and the compressor 51, the oxygen generator 52, and the ozone generator 53 are driven to start generating ozone (S10). .

  However, at the beginning of the activation of the ozone generator 5, the amount of ozone generated has not yet reached a sufficient level. Even if this is supplied to the ozone mixer 7 and mixed with the ballast water, aquatic organisms in the ballast water It is not possible to produce ballast water with sufficient ozone concentration to kill bacteria and bacteria.

  The control unit 14 continues to monitor the ozone concentration detection signal sent from the ozone concentration detection unit 11 immediately after the start of the activation of the ozone generator 5, and the ozone concentration (gas concentration) is a regulation necessary for processing the ballast water. It is determined whether or not the concentration has been reached (S11).

  As a result, since the ozone concentration has not yet reached the specified concentration at the beginning of the start of the ozone generator 5, the control unit 14 closes the on-off valve 12 provided in the ozone supply line 6 and closes the ozone mixing device 7. Prevent ozone from being supplied to the tank. Here, preferably, in order to process low-concentration ozone, the on-off valve 13 provided in the exhaust ozone line 10 is opened, and the low-concentration ozone is transferred to the exhaust ozone decomposition tower 9 for decomposition. (S12).

  This ozone transfer control to the exhaust ozone decomposition tower 9 is continued until the detection result of the ozone concentration detector 11 exceeds the specified concentration.

  The ozone concentration (gas concentration) generated by the ozone generator 5 after a predetermined time has reached a level sufficient to kill aquatic organisms and bacteria in the ballast water, and is detected by the ozone concentration detector 11. When the result reaches the specified concentration, the control unit 14 starts the operation of the ballast pump 4 in response to the detection result, and starts taking in the ballast water (S13).

  The ballast water taken by the ballast pump 4 eventually passes through the ozone mixing device 7 through the main pipe 3. After starting the operation of the ballast pump 4, the control unit 14 opens the open / close valve 12 in the ozone supply line 6 and closes the open / close valve 13 in the exhaust ozone line 10. Thereby, ozone with sufficient ozone concentration (gas concentration) is supplied to the ozone mixing device 6 through the ozone supply line 6 (S14).

  As a result, the ozone supplied from the ozone supply line 6 and the ballast water transferred through the main pipe 3 are mixed in the ozone mixing device 7. However, in the initial stage of mixing, the ozone concentration in the ballast water after passing through the ozone mixing device 7 may not yet reach the specified concentration (concentration in liquid). This is because the ozone concentration sent from the ozone generator 5 is unstable.

  When ozone is supplied from the ozone supply line 6 and mixed with the ballast water in the main pipe 3, the control unit 14 starts monitoring the ozone concentration detection signal sent from the ozone concentration detection unit 15 and inputs it. It is determined whether or not the ozone concentration (concentration in liquid) has reached a specified concentration (S15).

  As a result, since the ozone concentration in the ballast water on the secondary side of the ozone mixing device 7 has not yet reached the specified concentration at the beginning of ozone mixing, the control unit 14 has the open / close valve 17 provided in the main pipe 3. Is closed, the on-off valve 18 provided in the return line 16 is opened, and the ballast water is supplied to the primary side (inlet side) of the ozone mixing device 7 and to the primary side (inlet side) of the ballast pump 4. ), The ballast water is circulated between the main pipe 3 and the return line 16 without being transferred to the ballast tank 2 (S16).

  The circulation of the ballast water is continued until the detection result of the ozone concentration detection unit 15 reaches a specified concentration.

  When the ozone concentration in the ballast water mixed by the ozone mixing device 7 is stabilized after a predetermined time has elapsed and the detection result of the ozone concentration detection unit 15 reaches the specified concentration, the control unit 14 receives the detection result. Thus, the on-off valve 17 provided in the main pipe 3 is opened, and the on-off valve 18 provided in the return line 16 is closed, so that the ballast water that has passed through the ozone mixing device 7 is in the main pipe 3. It is made to transfer toward the ballast tank 2 through (S17).

  By mixing the ballast water and ozone in the ozone mixing device 7, most of aquatic organisms and bacteria in the ballast water are killed by the sterilizing action of ozone.

  In addition, since the ballast water mixed with ozone of a predetermined concentration through the ozone mixing device 7 passes through the opening 81 of the slit plate 8 next, aquatic organisms and bacteria remaining in the ballast water pass through the opening 81. It is further destroyed and killed by the shearing force that is generated.

  The mixing of ozone into the ballast water by the ozone mixing device 7 continues until the ballast water is taken in by the operation of the ballast pump 4 and the ballast tank 2 is full (S18).

  Eventually, when the ballast tank 2 becomes full, the activation of the ballast water treatment device is stopped. Here, the control unit 14 stops the operation of the ballast pump 4 (S19), then stops the ozone generator 5 and ends the ballast water treatment (S20).

  Thus, according to the second embodiment, the ozone concentration (gas concentration) generated by the ozone generator 5 does not reach the specified concentration, and is still sufficient to kill aquatic organisms and bacteria in the ballast water. If the ozone level has not been reached, control is performed so that ozone is not supplied to the ozone mixing device 7, and the ozone concentration (concentration in the liquid) from the ozone mixing device 7 to the slit plate 8 reaches the specified concentration. If not, since the ballast water after the ozone mixing device 7 is circulated between the return line 16 without being sent to the ballast tank 2, the ballast water is more stable with respect to the ballast water than the first embodiment. Thus, ozone of a predetermined concentration can be mixed.

  FIG. 7: is a schematic block diagram which shows 3rd Embodiment of the ballast water type | system | group piping which has a ballast water treatment apparatus. Since the same reference numerals as those in FIGS. 1 and 2 indicate the same configuration, detailed description thereof will be omitted.

  The third embodiment is structurally different in that it does not have a secondary side (outlet side) ozone concentration detection unit of the ozone mixing device 5 provided in the second embodiment.

  Here, in 3rd Embodiment, the control part 14 counts the elapsed time after opening the on-off valve 12, and supplying ozone to the ozone mixing device 7 by the ozone supply line 6, and the elapsed time is prescribed | regulated. It is determined whether or not time has elapsed.

  This specified time is a time that allows the ozone supplied from the ozone mixing device 7 to be mixed with the ballast water in the main pipe 3 and spread sufficiently, and is selected from, for example, 30 seconds to 3 minutes. it can.

  Then, the control unit 14 determines whether or not the ballast pump 4 can be started and the on-off valves 12, 13, and 17 according to the determination result of the ozone concentration (gas concentration) by the ozone concentration detection unit 11 and the counting result of the elapsed time. And 18 are controlled.

  In the figure, reference numeral 19 denotes a degassing tank, which is preferably provided for degassing excess ozone of ozone mixed with the ballast water in the main pipe 3 from the ozone mixing device 7. The capacity of the deaeration tank 19 is set to a capacity capable of storing the ballast water transferred when the ballast pump 4 is fully rotated for the specified time. It is also preferable that surplus ozone deaerated by the deaeration tank 19 is sent to the exhaust ozone decomposition tower 9 to be decomposed and discharged outside the ship. The deaeration tank 19 can also be provided in the return line 16.

  Next, start control of the ballast water treatment apparatus in the third embodiment will be described with reference to the flowchart of FIG.

  The activation of the ballast water treatment device is started when the ballast water is taken into the ballast tank 2.

  Now, the ballast pump 4 is in an operation stop state. When the ballast water is taken in by the ballast pump 4, first, the ozone generator 5 is started to start, and the compressor 51, the oxygen generator 52, and the ozone generator 53 are driven to start generating ozone (S30). .

  However, at the beginning of the activation of the ozone generator 5, the amount of ozone generated has not yet reached a sufficient level. Even if this is supplied to the ozone mixer 7 and mixed with the ballast water, aquatic organisms in the ballast water It is not possible to produce ballast water with sufficient ozone concentration to kill bacteria and bacteria.

  The control unit 14 continues to monitor the ozone concentration detection signal sent from the ozone concentration detection unit 11 immediately after the start of the activation of the ozone generator 5, and the ozone concentration (gas concentration) is a regulation necessary for processing the ballast water. It is determined whether or not the concentration has been reached (S31).

  As a result, since the ozone concentration has not yet reached the specified concentration at the beginning of the start of the ozone generator 5, the control unit 14 closes the on-off valve 12 provided in the ozone supply line 6 to close the ozone mixing device. 7 is not supplied with ozone. Here, preferably, in order to process low-concentration ozone, the on-off valve 13 provided in the exhaust ozone line 10 is opened, and the low-concentration ozone is transferred to the exhaust ozone decomposition tower 9 for decomposition. (S32).

  This ozone transfer control to the exhaust ozone decomposition tower 9 is continued until the detection result of the ozone concentration detector 11 exceeds the specified concentration.

  The ozone concentration (gas concentration) generated by the ozone generator 5 after a predetermined time has reached a level sufficient to kill aquatic organisms and bacteria in the ballast water, and is detected by the ozone concentration detector 11. When the result reaches the specified concentration, the control unit 14 receives the detection result, starts the operation of the ballast pump 4, and starts taking in the ballast water (S33).

  The ballast water taken by the ballast pump 4 eventually passes through the ozone mixing device 7 through the main pipe 3. After starting the operation of the ballast pump 4, the control unit 14 opens the open / close valve 12 in the ozone supply line 6 and closes the open / close valve 13 in the exhaust ozone line 10. Thereby, ozone with sufficient ozone concentration is supplied to the ozone mixing device 6 via the ozone supply line 6 (S34).

  As a result, the ozone supplied from the ozone supply line 6 and the ballast water transferred through the main pipe 3 are mixed in the ozone mixing device 7. However, in the initial stage of mixing, the ozone concentration (in-liquid concentration) in the ballast water after passing through the ozone mixing device 7 may not yet reach the specified concentration.

  When ozone is supplied from the ozone supply line 6 and mixed with the ballast water in the main pipe 3, the control unit 14 opens the on-off valve 12 and opens ozone to the ozone mixing device 7 through the ozone supply line 6. The elapsed time after the start of the supply is continuously counted, and it is determined whether or not the specified time has elapsed (S35).

  While the elapsed time has not elapsed until the specified time, the control unit 14 closes the on-off valve 17 provided on the main pipe 3 and opens the on-off valve 18 provided on the return line 16. By returning the ballast water to the primary side (inlet side) of the ballast pump 4, the ballast water is circulated between the main pipe 3 and the return line 16 without being transferred to the ballast tank 2 (S36).

  At this time, since excess ozone is removed from the ballast water returned to the ballast pump 4 through the return line 16 through the deaeration tank 19, the ballast pump 4 is not adversely affected.

  Eventually, when the specified time elapses, the control unit 14 opens the on-off valve 17 provided in the main pipe 3 and closes the on-off valve 18 provided in the return line 16 to close the ozone mixing device. The ballast water that has passed through 7 is transferred to the ballast tank 2 through the main pipe 3 (S37).

  By mixing the ballast water and ozone in the ozone mixing device 7, most of aquatic organisms and bacteria in the ballast water are killed by the sterilizing action of ozone.

  In addition, since the ballast water mixed with ozone of a predetermined concentration through the ozone mixing device 7 passes through the opening 81 of the slit plate 8 next, aquatic organisms and bacteria remaining in the ballast water pass through the opening 81. It is further destroyed and killed by the shearing force that is generated.

  The mixing of ozone into the ballast water by the ozone mixing device 7 continues until the ballast water is taken up by the operation of the ballast pump 4 and the ballast tank 2 is full (S38).

  Eventually, when the ballast tank 2 becomes full, the operation of the ballast water treatment device is stopped. Here, the control unit 14 stops the operation of the ballast pump 4 (S39), then stops the ozone generator 5 and ends the ballast water treatment (S40).

  Thus, according to the third embodiment, the ozone concentration (gas concentration) generated by the ozone generator 5 does not reach the specified concentration, and is still sufficient to kill aquatic organisms and bacteria in the ballast water. If it has not reached the required level, control is performed so that ozone is not supplied to the ozone mixing device 7, and after the ozone is supplied to the ozone mixing device 7, the ballast water after the ozone mixing device 7 is passed until a specified time elapses. Is circulated between the return line 16 without being sent to the ballast tank 2, so that ozone of a predetermined concentration can be mixed more stably with the ballast water than in the first embodiment. become.

  Moreover, since it is not necessary to provide the ozone concentration detector 15 in the main pipe 3 as in the second embodiment, signal wiring to the controller 14 can be simplified.

  Although the slit plate 8 for destroying the aquatic organisms and bacteria in ballast water with a shearing force is provided after the ozone mixing device 7 in the above description, it is not limited to this, The slit plate 8 The aspect in which the ozone mixing device 7 was provided later may be sufficient.

  Further, the ozone mixing device 7 may be disposed on the primary side (inlet side) of the ballast pump 4. In this case, the return line 16 in the second and third embodiments is provided so that the ballast water is returned to the primary side (inlet side) of the ozone mixing device 7.

The schematic block diagram which shows 1st Embodiment of the ballast water system piping which has a ballast water treatment apparatus. Sectional view showing slit plate in main piping Sectional view taken along line III-III in FIG. The flowchart explaining the starting control of the ballast water treatment apparatus in 1st Embodiment. The schematic block diagram which shows 2nd Embodiment of the ballast water type | system | group piping which has a ballast water treatment apparatus. The flowchart explaining the starting control of the ballast water treatment apparatus in 2nd Embodiment. The schematic block diagram which shows 3rd Embodiment of the ballast water type | system | group piping which has a ballast water treatment apparatus. The flowchart explaining the starting control of the ballast water treatment apparatus in 3rd Embodiment.

Explanation of symbols

1: Hull 2: Ballast tank 3: Main piping 4: Ballast pump 5: Ozone generator 51: Compressor 52: Oxygen generator 53: Ozone generator 6: Ozone supply line 7: Ozone mixer 8, 8A, 8B: Slit Plate 81: Slit-shaped opening 9: Exhaust ozone decomposition tower 10: Exhaust ozone line 11: Ozone concentration detector (I)
12, 13: On-off valve 14: Control unit 15: Ozone concentration detection unit (II)
16: Return line 17, 18: On-off valve 19: Deaeration tank

Claims (5)

An activation control system for a ballast water treatment device installed in a ship,
The ballast water treatment device includes a ballast pump that transfers ballast water to a ballast tank via a ballast water system pipe, an ozone mixing device that mixes ozone generated by the ozone generator into the ballast water, aquatic organisms in the ballast water, A slit plate having a plurality of slit-like openings for destroying bacteria by shearing force;
It has an ozone concentration detection unit for detecting the ozone concentration generated by the ozone generator, inputs the ozone concentration obtained by the ozone concentration detection unit, and determines whether or not the input ozone concentration reaches a specified concentration When the specified concentration has not been reached, the ballast pump is stopped, and control is performed so as not to supply ozone to the ozone mixing device, and when the specified concentration has been reached, the operation of the ballast pump is started. start control system of the ballast water treatment apparatus characterized by comprising a control unit that starts the intake of the ballast water, it performs control to supply ozone to the ozone supply device.   2. The activation control system for a ballast water treatment apparatus according to claim 1, wherein the control unit performs control to send ozone that is not supplied to the ozone mixing device to a waste ozone decomposition tower, decompose and discharge the ozone to the outside. . An activation control system for a ballast water treatment device installed in a ship,
The ballast water treatment device includes a ballast pump that transfers ballast water to a ballast tank via a ballast water system pipe, an ozone mixing device that mixes ozone generated by the ozone generator into the ballast water, aquatic organisms in the ballast water, A slit plate having a plurality of slit-like openings for destroying bacteria by shearing force;
An ozone concentration detector (II) that detects the ozone concentration in the ballast water from the ozone mixing device to the slit plate is provided in the ozone supply line with an ozone concentration detector (I) that detects the ozone concentration generated by the ozone generator. Provided,
The ozone concentration obtained by the ozone concentration detector (I) is input, and it is determined whether or not the input ozone concentration has reached a specified concentration. If the ozone concentration has reached a specified concentration, ozone is supplied to the ozone mixing device. Control to supply, if the specified concentration has not been reached, perform control not to supply ozone to the ozone mixing device,
The ozone concentration obtained by the ozone concentration detector (II) is input, and it is determined whether or not the input ozone concentration has reached a specified concentration. An activation control system for a ballast water treatment apparatus, comprising a control unit that performs control to return water to a line on the inlet side of the ballast pump before the ozone mixing apparatus without sending water to the ballast tank. An activation control system for a ballast water treatment device installed in a ship,
The ballast water treatment device includes a ballast pump that transfers ballast water to a ballast tank via a ballast water system pipe, an ozone mixing device that mixes ozone generated by the ozone generator into the ballast water, aquatic organisms in the ballast water, A slit plate having a plurality of slit-like openings for destroying bacteria by shearing force;
An ozone concentration detector (I) for detecting the ozone concentration generated by the ozone generator is provided in the ozone supply line,
The ozone concentration obtained by the ozone concentration detector (I) is input, and it is determined whether or not the input ozone concentration has reached a specified concentration. If the ozone concentration has reached a specified concentration, ozone is supplied to the ozone mixing device. Control to supply, if the specified concentration has not been reached, perform control not to supply ozone to the ozone mixing device,
And after supplying ozone to the ozone mixing device, the ballast water after the ozone mixing device is not sent to the ballast tank until a specified time elapses, but before the ozone mixing device and on the inlet side of the ballast pump A start control system for a ballast water treatment apparatus, comprising a control unit that performs control for returning to the ballast water treatment apparatus.   The ballast water treatment apparatus according to any one of claims 1 to 4, wherein ballast water mixed with ozone by the ozone mixing device is passed through the slit plate having a plurality of slit-shaped openings. system.