WO2017033487A1 - Dispositif et procédé de traitement des eaux de ballast - Google Patents

Dispositif et procédé de traitement des eaux de ballast Download PDF

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Publication number
WO2017033487A1
WO2017033487A1 PCT/JP2016/059806 JP2016059806W WO2017033487A1 WO 2017033487 A1 WO2017033487 A1 WO 2017033487A1 JP 2016059806 W JP2016059806 W JP 2016059806W WO 2017033487 A1 WO2017033487 A1 WO 2017033487A1
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WIPO (PCT)
Prior art keywords
flow rate
water
line
ballast water
ballast
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PCT/JP2016/059806
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English (en)
Japanese (ja)
Inventor
智陽 丹下
昭典 川上
義信 平木
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三浦工業株式会社
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Application filed by 三浦工業株式会社 filed Critical 三浦工業株式会社
Priority to JP2016539246A priority Critical patent/JP6011748B1/ja
Publication of WO2017033487A1 publication Critical patent/WO2017033487A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light

Definitions

  • the present invention relates to a ballast water treatment apparatus and a ballast water treatment method including an ultraviolet irradiation unit that irradiates ballast water with ultraviolet rays.
  • This application claims priority based on Japanese Patent Application No. 2015-163549 for which it applied to Japan on August 21, 2015, and uses the content here.
  • ballast water In a ship such as a tanker, when navigating to the destination again after unloading the crude oil, etc., the ballast water is generally placed in the ballast tank provided in the ship in order to balance the navigating ship. It stores water called. Ballast water is basically taken at the loading port and discharged at the loading port. Therefore, if they are different, plankton and bacterial microorganisms contained in the ballast water will move around the world. Therefore, if ballast water is discharged from a loading port in a sea area different from the cargo port, microorganisms in another sea area will be released to that port, which may destroy the ecosystem in that sea area.
  • Ballast water treatment equipment is used to reduce the content of microorganisms contained in ballast water.
  • the ballast water treatment apparatus may include a filter that filters the ballast water and an ultraviolet irradiation unit that irradiates the filtered water with ultraviolet rays (see Patent Document 1 below).
  • the ballast water treatment apparatus described in Patent Document 1 the filtered treated water stored in the ballast tank is discharged outside the ship after being irradiated with ultraviolet rays by the ultraviolet irradiation unit.
  • the ballast water treatment apparatus may be configured to be able to switch the waste water from the ballast tank to drainage by water head pressure and drainage by a pump (see Patent Document 2 below).
  • Water drainage is performed prior to pump drainage when the ballast tank is nearly full.
  • the reason is as follows.
  • the amount of drainage can be increased by the drainage by the head pressure rather than the drainage by the pump.
  • the head pressure decreases, so that drainage by the pump can increase the amount of drainage rather than drainage by the head pressure. Therefore, drainage by the water head pressure is performed first, and then the pump drainage is switched at an appropriate timing, so that the drainage time as a whole drainage treatment can be shortened.
  • the bactericidal effect by the ultraviolet irradiation part is effective for a flow rate below a certain level, and is insufficient for an excessive flow rate.
  • an ultraviolet irradiation unit is placed in the drainage path from the ballast tank to irradiate the drainage with ultraviolet rays.
  • the flow rate of the waste water due to the water head pressure is kept small, it is possible to suppress the waste water flow rate from becoming excessive with respect to the processing capacity of the ultraviolet irradiation unit.
  • the effect that “the drainage by the water head pressure is performed first and then the drainage by the pump can be switched to shorten the drainage time as a whole drainage treatment” is not achieved.
  • the above contents are similarly applied even when the ballast water stored in the ballast tank is ballast water that has not been subjected to filtration treatment by a filter or ultraviolet treatment by an ultraviolet irradiation unit.
  • An object of the present invention is to provide a ballast water treatment device and a ballast water treatment method.
  • the present invention includes a ballast tank that stores ballast water, an ultraviolet irradiation unit that irradiates the ballast water flowing out of the ballast tank with ultraviolet rays, and the ballast water that has been irradiated with ultraviolet rays by the ultraviolet irradiation unit.
  • a line for discharging a pressure feeding unit for pumping ballast water stored in the ballast tank toward the ultraviolet irradiation unit, a flow rate adjusting unit for adjusting a flow rate of water flowing through the line, and water flowing through the line
  • a flow rate measuring unit for measuring the flow rate of the water
  • a control unit for controlling the flow rate adjusting unit so as to adjust the flow rate and switching the discharge mode of the ballast water, wherein the ballast water discharge mode is stored in the ballast tank.
  • the ballast water to be discharged is discharged from the system through the ultraviolet irradiation unit and the line due to water head pressure, and the ball head water discharging mode.
  • the ballast water stored in the tank can be switched to a pumping discharge mode in which the pumping unit is discharged to the outside of the system through the ultraviolet irradiation unit and the line, and the discharging process is performed in the water head pressure discharging mode.
  • a control unit that executes a discharge process in a pressure-feed discharge mode after being executed, and the control unit has a capability that the flow rate of water flowing through the line is a flow rate that can guarantee the processing capability of the ultraviolet irradiation unit
  • the present invention relates to a ballast water treatment apparatus that controls the flow rate adjusting unit so that the flow rate of water flowing through the line in the water head pressure discharge mode is close to the capability-guaranteed flow rate from a small flow rate state smaller than the secured flow rate.
  • control unit may control the flow rate adjusting unit so as to form the small flow rate state based on a flow rate measured by the flow rate measuring unit at an initial stage of the ballast water discharge process.
  • control unit may control the flow rate adjusting unit so that the predetermined low flow rate state can be formed at the initial stage of the ballast water discharge process.
  • control unit may switch the discharge mode of the ballast water from the head pressure discharge mode to the pump discharge mode.
  • the present invention is a ballast water treatment method for discharging ballast water flowing out of a ballast tank out of the system through a line after being irradiated with ultraviolet rays by an ultraviolet irradiation unit, and a flow rate of water flowing through the line
  • ballast water discharge mode the ballast water stored in the ballast tank is discharged to the outside of the system through the ultraviolet irradiation unit and the line by the water head pressure, and the ballast tank
  • the stored ballast water is sent by the pumping unit that pumps the ballast water stored in the ballast tank toward the ultraviolet irradiation unit.
  • the present invention relates to a ballast water treatment method for controlling the flow rate of circulating water so as to approach the capacity-guaranteed flow rate.
  • the flow rate adjustment step may adjust the flow rate so as to form the small flow rate state based on the flow rate measured in the flow rate measurement step at the initial stage of the ballast water discharge process.
  • the flow rate may be adjusted so as to form the small flow rate state determined in advance in the initial stage of the ballast water discharge process.
  • control step may switch the ballast water discharge mode from the head pressure discharge mode to the pressure discharge mode.
  • a ballast water treatment apparatus and a ballast water treatment method can be provided.
  • FIG. 1 is a flowchart showing an embodiment of the ballast water treatment apparatus of the present invention.
  • FIG. 2 is a flowchart showing a water path during the ballast water filtration process.
  • FIG. 3 is a flowchart showing a water path in the water head pressure discharge mode.
  • FIG. 4 is a flowchart showing a water path in the pressure-feeding and discharging mode.
  • FIG. 5 is a flow diagram showing a water path in the stripping discharge mode.
  • FIG. 6 is a graph showing changes in the drainage flow rate.
  • a ballast water treatment apparatus 1 of this embodiment includes a ballast water filtration apparatus 20 having a filter 2, an ultraviolet reactor 3 as an ultraviolet irradiation section, an ejector 5, and a flow meter as a flow measurement section. 61 and a control unit 9.
  • the control unit 9 is connected to each device by a signal line (not shown) so as to control each device to be controlled.
  • the ballast water treatment apparatus 1 includes a line L1, a line L11, a line L12, a line L13, a line L21, a line L22, a line L23, and a line L24 as lines.
  • Line is a general term for lines capable of flowing fluid such as flow paths, paths, and pipelines.
  • the ballast water filtration device 20 includes a filter 2, a casing (not shown) that houses the filter 2, and a filter rotating means (not shown).
  • the filter 2 has a cylindrical shape as a whole, and filters the ballast water W1 (mainly seawater) as the water to be treated that has flowed into the filter 2 and flows it out as ballast water (filtered water) W2.
  • the filter rotating means rotates the filter 2 around its axis.
  • the UV reactor 3 sterilizes by irradiating the ballast water (filtered water) W2 obtained by filtering with the filter 2 with UV rays.
  • the ballast tank 4 stores the ballast water W2 that has been irradiated with ultraviolet rays by the ultraviolet reactor 3 as the stored treated water W3.
  • the ballast tank 4 is provided with a water level detector 42.
  • the ballast tank 4 is used in the hull SH so that the ballast water (stored treated water W3) stored in the ballast tank 4 can be discharged out of the ship (outside the system) by the water head pressure in the water head pressure discharge mode (described later). It arrange
  • Ballast water is discharged before being introduced (inflow) into the ballast tank 4 or after being discharged (outflow) from the ballast tank 4, and before being introduced (inflow) into the filter 2 or discharged from the filter 2. Regardless of whether it has been (flowed out), it is further expressed as “ballast water” regardless of whether it has been introduced (inflowed) into the ultraviolet reactor 3 or discharged (outflowed) from the ultraviolet reactor 3. Further, “ballast water” is appropriately expressed as “treated water”, “filtered water”, “reserved treated water”, “drainage”, etc. depending on the situation. Ballast water includes seawater, fresh water, and brackish water.
  • the ejector 5 includes a suction port 51, a discharge port 52, and a supply port 53.
  • the ejector 5 sucks water from the suction port 51 and discharges it from the discharge port 52 by a driving force based on the drive water W 34 supplied from the supply port 53.
  • the flow meter 61 measures the flow rate of the ballast water W3 as drainage flowing through the line L12.
  • Lines are distinguished on the basis of function, and therefore there may be a shared portion (overlapping portion) between the lines.
  • the line L1 and the line L22 are shared (overlapped) between the connection part J2 and the connection part J5.
  • the line L21 and the line L22 are shared (overlapped) in portions other than between the connection portion J22 and the connection portion J3.
  • the line L1 is a line into which ballast water W1 (mainly seawater) is introduced from one end and is connected to the treated water inlet of the ballast water filtration device 20 at the other end, and the ballast water W1 is ballast water. It is a line that circulates toward the inside of the filter 2 of the filtration device 20.
  • the line L1 includes a first sea chest SH1, a connection portion J1, a valve V2, a connection portion J2, a pump P1 as a pressure feeding portion, a connection portion J3, a connection portion J4, a connection portion J5, a valve V1, and a ballast water filtration device 20. They are provided in this order.
  • Pump P1 pumps ballast water W1 (mainly seawater) from one end of line L1.
  • the pump P1 pumps (sucks and pressurizes and discharges) the water flowing through the line L1 (line L22) (the treated water W1 during the filtration of the treated water and the stored treated water W3 in the pressure discharge mode). It functions as a pumping unit.
  • the line L11 is connected to the treated water outlet of the ballast water filtration device 20 at one end and connected to the ballast tank 4 at the other end, and is filtered by the filter 2 of the ballast water filtration device 20.
  • This is a line through which the ballast water (filtered water) W ⁇ b> 2 flows toward the ballast tank 4.
  • ballast water filtration device 20 connecting portion J11, ultraviolet reactor 3, valve V11, connecting portion J12, connecting portion J13, valve V12, connecting portion J15, and water inlet / outlet 41 inside ballast tank 4 are arranged in this order. Is provided.
  • the other end of the line L12 is connected to the second sea chest SH2 of the hull SH.
  • the line L12 is connected to the ultraviolet reactor 3 at one end, and discharges ballast water (reserved treated water, drainage) W3 from the other end to the outside of the system (outboard).
  • the line L12 is provided with the ultraviolet reactor 3, the valve V11, the connection portion J12, the connection portion J13, the valve V41, the flow meter 61, and the second sea chest SH2 in this order.
  • valves provided in the line L12 can function as a flow rate adjusting unit that adjusts the flow rate of water flowing through the line L12.
  • the valve V11 functions as a flow rate adjustment unit during normal operation
  • the valve V41 functions as a flow rate adjustment unit depending on the operation.
  • the valve provided in lines other than the line L12 can also be used as a flow volume adjustment part.
  • the flow rate adjusting unit can be configured by other than the valve.
  • the line L11 and the line L12 are shared (overlapping) between the ultraviolet reactor 3 and the connection portion J13.
  • each of the line L21, the line L22, and the line L23 is provided with a water inlet / outlet 41 inside the ballast tank 4 at one end and connected to the ultraviolet reactor 3 at the other end. It is a line.
  • the water inlet / outlet port 41 is disposed inside the ballast tank 4 (specifically, near the bottom).
  • the ballast water W3 stored in the ballast tank 4 is sucked from the water inlet / outlet 41 and flows out toward the ultraviolet reactor 3.
  • the ballast water W3 stored in the ballast tank 4 flows through the line L21 due to the water head pressure in the water head pressure discharge mode.
  • the ballast water W3 stored in the ballast tank 4 flows through the line L22 by the suction / pumping force of the pump P1 in the pressure discharge mode.
  • the ballast water W3 stored in the ballast tank 4 flows through the line L23 by the suction / driving force of the ejector 5 in the stripping discharge mode.
  • the line L21, the line L22, and the line L23 each have a common part in a part including both ends. Each intermediate part is not shared (not duplicated).
  • the line L21 includes a water inlet / outlet port 41, a connection portion J15, a connection portion J21, a connection portion J22, a valve V21, a connection portion J3, a connection portion J4, a connection portion J5, a valve V25, a connection portion J14,
  • the valve V26, the connection part J11, and the ultraviolet reactor 3 are provided in this order.
  • the line L22 includes a water inlet / outlet port 41, a connection portion J15, a connection portion J21, a connection portion J22, a valve V22, a connection portion J2, a pump P1, a connection portion J3, a connection portion J4, a connection portion J5,
  • the valve V25, the connection part J14, the valve V26, the connection part J11, and the ultraviolet reactor 3 are provided in this order.
  • the line L23 includes a water inlet / outlet port 41, a connection portion J15, a connection portion J21, a valve V23, a suction port 51 of the ejector 5, a discharge port 52 of the ejector 5, a valve V24, a connection portion J4, and a connection portion.
  • J5 valve V25, connection part J14, valve V26, connection part J11, and ultraviolet reactor 3 are provided in this order.
  • the stored treated water W3 and the drive water W34 flow through the line L23 on the downstream side of the ejector 5.
  • the line L24 is connected to the first sea chest SH1 of the hull SH.
  • the line L24 is a line into which driving water W34 (mainly seawater) is introduced from one end and connected to the supply port 53 of the ejector 5 at the other end.
  • the line L24 is provided with a first sea chest SH1, a connection portion J1, a valve V27, a pump P21, and a supply port 53 of the ejector 5 in this order.
  • the pump P21 sucks and pressurizes the driving water W34 flowing through the line L24, discharges it, and sends it out.
  • the driving water W34 flows through the line L24.
  • the line L13 is a line that is connected to the connection part J14 at one end and is connected to the connection part J12 at the other end.
  • the line L13 is provided with a valve V42.
  • the line L13 is used, for example, when the ultraviolet reactor 3 is bypassed to flow water in an emergency.
  • the common part (overlapping part) in each line will be further explained.
  • the line L21 and the line L22 are shared (overlapped) in a portion other than between the connection portion J22 and the connection portion J3.
  • the line L22 and the line L23 are shared (overlapped) in a portion other than between the connection portion J21 and the connection portion J4.
  • the portion between the first sea chest SH1 and the connection portion J1 is a shared portion of the line L1 and the line L24.
  • Between the connection part J2 and the connection part J3 is a shared part of the line L1 and the line L22.
  • connection part J3 and connection part J4 it is a shared part of line L1, line L22, and line L21.
  • Between the connection part J4 and the connection part J5 is a shared part of the line L1, the line L22, the line L21, and the line L23.
  • the connection part J11 and the ultraviolet reactor 3 it is a shared part of the line L11, the line L21, the line L22, and the line L23.
  • the ejector 5 uses the kinetic energy of the drive water W34 supplied via the line L24 and the supply port 53 to store the stored treated water W3 remaining at the bottom of the ballast tank 4 via the line L23 on the upstream side of the ejector 5. Suck up. Further, the ejector 5 discharges the stored treated water W3 and the driving water W34 from the discharge port 52 to the line L23 on the downstream side of the ejector 5 in a mixed state.
  • Valves (V11, V41) adjust the flow rate of waste water (ballast water, stored treated water) W3 (W31, W32, W33) flowing through the line L12.
  • the valves (V11, V41) may be capable of adjusting the flow rate steplessly or may be adjustable stepwise.
  • the flow meter 61 is provided on the downstream side of the valves (V11, V41) in the line L12, and measures the flow rate of the waste water W3 flowing through the line L12.
  • the water level detection unit 42 detects the water level (detected water level Hs) of the stored treated water W3 stored in the ballast tank 4, and for example, the detected water level Hs is a specific water level (for example, a first reference water level H1 and a second water level described later). It is detected that the reference water level H2 and the third reference water level H3) have been reached.
  • the water level detection unit 42 is configured to transmit a detection signal to the control unit 9 when it is detected that the water level inside the ballast tank 4 has reached a specific water level.
  • Control unit 9 controls each device to be controlled.
  • the control unit 9 controls the valves (V11, V41) to adjust the flow rate of the waste water W3 based on the flow rate of the waste water W3 (W31, W32, W33) measured by the flow meter 61 (flow rate feedback). Control) and the discharge mode of the stored treated water W3 is switched.
  • the control part 9 can also control a valve
  • the first reference water level H1 is a water level at which the drainage flow rate in the head pressure discharge mode is smaller than the drainage flow rate in the pressure discharge mode, and the water level is switched from the head pressure discharge mode to the pressure discharge mode.
  • the second reference water level H2 is a level at which the water level inside the ballast tank 4 becomes lower than that, and the stored treated water W3 cannot be sucked smoothly in the pressure delivery mode.
  • the discharge mode is changed from the pressure mode to the stripping mode.
  • the water level is switched to.
  • the third reference water level H3 is a water level at which the stored treated water W3 remaining at the bottom of the ballast tank 4 cannot be sucked and discharged even by the stripping discharge mode when the water level inside the ballast tank 4 becomes lower than that, This is the water level that terminates the wastewater treatment.
  • ballast water (stored treated water) W3 stored in the ballast tank 4 is sent out by the water head pressure, and the line L21, the ultraviolet reactor 3, etc. This is a discharge mode in which the wastewater W31 is discharged out of the system (outside the ship) via the.
  • B Pressure-feeding / discharging mode As shown in FIG.
  • the stored treated water W3 stored in the ballast tank 4 is sent out by the suction / pressure-feeding force of the pump P1, and the line L22, the pump P1, and the ultraviolet reactor This is a discharge mode in which the waste water W32 is discharged out of the system through 3 or the like.
  • C Stripping discharge mode As shown in FIG. 5, in the stripping discharge mode, the stored treated water W3 stored in the ballast tank 4 is sent out by the suction / driving force of the ejector 5, and the line L23, the ejector 5, This is a discharge mode in which the wastewater W33 is discharged out of the system through the ultraviolet reactor 3 or the like.
  • the control unit 9 switches the discharge mode of the ballast water (reserved treated water) W3 to the head pressure discharge mode, the pumping discharge mode, or the stripping discharge mode. As shown in FIG.
  • the control unit 9 causes the discharge process to be executed in the hydraulic head pressure discharge mode at the beginning of the discharge process of the stored treated water W3, and then causes the discharge process to be executed in the pumping discharge mode, and then causes the discharge process to be executed in the stripping discharge mode. .
  • the controller 9 controls the valves (V11, V41) so that the flow rate of the waste water flowing through the line L12 is smaller than the capacity-guaranteed flow rate Fs (see FIG. 6) at the beginning of the discharge process of the stored treated water W3. Thereafter, the valves (V11, V41) are controlled so that the flow rate of the waste water flowing through the line L12 is brought close to the capacity-guaranteed flow rate Fs in the water head pressure discharge mode.
  • the capacity-guaranteed flow rate Fs is a flow rate that can guarantee the processing capability of the ultraviolet reactor 3, and is 110% or 120% of the rated flow rate, for example.
  • the aforementioned state in which the flow rate of the waste water flowing through the line L12 is smaller than the capacity-guaranteed flow rate Fs is also referred to as a “small flow rate state”.
  • the control unit 9 controls the valves (V11, V41) as flow rate adjusting units so as to form the small flow rate state based on the flow rate measured by the flow meter 61 at the beginning of the discharge process of the ballast water W3. be able to.
  • control unit 9 is configured as a flow rate adjustment unit in a state where the predetermined small flow rate state can be formed without being based on the flow rate measured by the flow meter 61 at the initial stage of the discharge process of the ballast water W3.
  • the valves (V11, V41) can be controlled. Specifically, by setting the opening of the valve to an opening that can form a predetermined small flow rate state, the valves (V11, V41) are brought into a state in which the small flow state can be formed. be able to.
  • the solid line indicates the change in the drainage flow rate in the present invention
  • the broken line in the head pressure discharge mode indicates the change in the drainage flow rate in the prior art.
  • the timing at which the flow rate of the waste water is made smaller than the capacity-guaranteed flow rate Fs is not limited to the beginning of the discharge process of the stored treated water W3, and even in the initial stage of the discharge process of the stored treated water W3 (a certain period from the beginning) Good.
  • the control unit 9 switches the discharge mode of the stored treated water W3 from the head pressure discharge mode to the pumping discharge mode.
  • the control unit 9 switches the discharge mode of the stored treated water W3 from the pumping discharge mode to the stripping discharge mode.
  • the control unit 9 ends the discharge process of the stored treated water W3.
  • the treated water W1 introduced into the ballast water filtration device 20 is filtered by the filter 2 and discharged from the ballast water filtration device 20 as the filtered water W2.
  • the filtered treated water W2 flows through the line L11, is subjected to ultraviolet treatment by the ultraviolet reactor 3, and is stored in the ballast tank 4 as stored treated water W3.
  • ballast water (reserved treated water) W3 Wastewater treatment of ballast water (reserved treated water) W3 from the ballast tank 4 to the outside (water head pressure discharge mode)
  • the valve V21, the valve V25, the valve V26, the valve V11, and the valve V41 are opened, and the valve V12, the valve V23, the valve V22, the valve V2, the valve V24, the valve V1, and the valve V42 are closed.
  • the ballast water (reserved treated water) W3 stored in the ballast tank 4 is discharged to the outside of the ballast tank 4 through the line L21 due to the water head pressure, and further subjected to ultraviolet treatment by the ultraviolet reactor 3. Then, it is discharged out of the ship as drainage W31 via line L12.
  • ballast water (storage treated water) W3 from the ballast tank 4 to the outside (pressure discharge mode)
  • the valve V22, the valve V25, the valve V26, the valve V11, and the valve V41 are opened, and the valve V12, the valve V23, the valve V21, the valve V2, the valve V24, the valve V1, and the valve V42 are closed.
  • the pump P1 is operated.
  • the ballast water (stored treated water) W3 stored in the ballast tank 4 is discharged to the outside of the ballast tank 4 through the line L22 by the suction / pumping force by the pump P1, and is subjected to ultraviolet treatment by the ultraviolet reactor 3. Then, it is discharged out of the boat as drainage W32 through the line L12.
  • ballast water (reserved treated water) W3 remaining at the bottom of the ballast tank 4 is discharged to the outside of the ballast tank 4 via the line L23 by the suction / driving force of the drive water W34, and further by the ultraviolet reactor 3 It is subjected to ultraviolet treatment and discharged out of the ship as drainage W33 via line L12.
  • the ballast water treatment apparatus 1 of the present embodiment operates as follows during wastewater treatment, and executes one embodiment of the ballast water treatment method.
  • FIG. 7 is a flowchart showing control of wastewater treatment in the embodiment. As shown in FIG. 7, first, in step S1, the ballast water treatment apparatus 1 receives an instruction to start wastewater treatment.
  • step S2 the control unit 9 starts the waste water treatment of the stored treated water W3 in the water head pressure discharge mode. Specifically, the control unit 9 sets the flow rate of the wastewater flowing through the line L12 via the line L21 at the beginning of the discharge process of the stored treated water W3 (time t0 in FIG. 6) as the capacity-guaranteed flow rate Fs (FIG. 6).
  • the valves (V11, V41) are controlled so as to be smaller than (see) (to form a small flow rate state).
  • the small flow rate state can be formed by the first small flow rate state formation control and the second small flow rate state formation control described above.
  • control unit 9 controls the valves (V11, V41) so that the flow rate of the waste water flowing through the line L12 approaches the capability-guaranteed flow rate Fs (time t0 to time t1 to time t2 in FIG. 6).
  • step S3 control of the valves (V11, V41) is stopped. Specifically, when drainage proceeds in the water head pressure discharge mode, the water head pressure decreases, and therefore the drainage flow rate begins to become smaller than the capacity-guaranteed flow rate even when the valves (V11, V41) are fully opened (time in FIG. 6).
  • step S3 control of the valves (V11, V41) is stopped with the valves (V11, V41) fully opened. As shown in FIG. 6, from time t2 to time t3, the drainage flow rate gradually decreases as the head pressure decreases.
  • step S4 the control unit 9 determines whether or not the water level (detected water level Hs) detected by the water level detection unit 42 is lower than the first reference water level H1.
  • step S4: YES; time t3 shown in FIG. 6 the control unit 9 advances the process to step S5.
  • the control part 9 returns a process to step S4 in other cases (step S4: NO).
  • step S5 when the detected water level Hs is lower than the first reference water level H1, the control unit 9 switches the discharge mode of the stored treated water W3 from the head pressure discharge mode to the pumping discharge mode. Specifically, the valve V21 is closed, the valve V22 is opened, and the pump P1 is operated. As a result, the stored treated water W3 flows toward the line L12 via the line L22 by the suction / pumping force of the pump P1.
  • step S6 the control unit 9 determines whether or not the detected water level Hs is lower than the second reference water level H2. When it is determined that the detected water level Hs is lower than the second reference water level H2 (step S6: YES, time t4 shown in FIG. 6), the control unit 9 advances the process to step S7. Moreover, the control part 9 returns a process to step S6 in other cases (step S6: NO).
  • step S7 when the detected water level Hs is lower than the second reference water level H2, the control unit 9 switches the discharge mode of the stored treated water W3 from the pumping discharge mode to the stripping discharge mode. Specifically, the valve V22 is closed, the valves V23, V24, and V27 are opened, and the pump P21 is operated. Thereby, the stored treated water W3 flows toward the line L12 via the line L23 by the suction / driving force by the ejector 5.
  • step S8 the control unit 9 determines whether or not the detected water level Hs is lower than the third reference water level H3. When it is determined that the detected water level Hs is lower than the third reference water level H3 (step S8: YES, time t5 shown in FIG. 6), the control unit 9 ends the waste water treatment. In other cases (step S8: NO), the controller 9 returns the process to step S8.
  • the ballast water treatment apparatus 1 of this embodiment is provided in the line L1, and irradiates the pump P1 that pumps the water flowing through the line L1 and the ballast water (the filtered treated water W2 and the stored treated water W3) with ultraviolet rays.
  • the ultraviolet reactor 3 to be performed, the line L12 for discharging the treated water W3 irradiated with ultraviolet rays from the ultraviolet reactor 3, and the ballast water (stored treated water) W3 (W31) stored in the ballast tank 4 are the head pressure.
  • the water W3 (W31) is discharged from the system via the line L21, the ultraviolet reactor 3 and the line L12 due to the water head pressure, and the stored treated water W3 (W32) stored in the ballast tank 4 is used.
  • the pump P1 can be switched to a pumping discharge mode that is discharged to the outside of the system via the line L22, the ultraviolet reactor 3 and the line L12, and after performing the discharging process in the water head pressure discharging mode, the pumping discharge is performed.
  • a control unit 9 that executes the discharge process in the mode.
  • the control unit 9 starts the water flow through the line L12 in the water head pressure discharge mode from the small flow rate state where the flow rate of the water flowing through the line L12 is smaller than the capacity-guaranteed flow rate Fs that is a flow rate that can secure the processing capacity of the ultraviolet reactor 3.
  • the valves (V11, V41) are controlled so that the flow rate of the valve approaches the capacity-guaranteed flow rate Fs.
  • the flow rate of the waste water due to the water head pressure becomes excessive, the flow rate exceeds the capacity-guaranteed flow rate Fs of the ultraviolet reactor 3, and the sterilizing effect by the ultraviolet reactor 3 is not sufficiently achieved.
  • the flow rate of the wastewater due to the water head pressure is suppressed at first, and the flow rate is then brought close to the capacity-guaranteed flow rate Fs, so that the flow rate is unlikely to be excessive. Therefore, according to this embodiment, when performing drainage in the hydraulic head pressure discharge mode first and then switching to drainage in the pressure discharge mode, sterilization by the ultraviolet irradiation unit while maintaining a reduction in drainage time as a whole wastewater treatment An effect can be produced appropriately.
  • the control unit 9 controls the stored treated water W3. Switch the discharge mode from the water head pressure discharge mode to the pumping discharge mode. Therefore, according to this embodiment, it is easy to switch the discharge mode from the hydraulic head pressure discharge mode to the pumping discharge mode at an appropriate timing.
  • the preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be implemented in various forms.
  • the pumping unit is not limited to a pump.
  • the small flow rate state (the state in which the flow rate of water flowing through the line L12 is smaller than the capacity-guaranteed flow rate) is set by the control unit 9 controlling the valve that functions as the flow rate adjustment unit.
  • it may be set in advance before the start of the ballast water discharge process regardless of the control of the control unit 9.
  • an operator or the like can set a small flow rate state by operating a valve functioning as a flow rate adjustment unit before the start of the ballast water discharge process. And the discharge process of a ballast water is started from this state, and control of the valve which functions as a flow volume adjustment part by the control part 9 is started.
  • the ballast water stored in the ballast tank 4 is ballast water that has been filtered by the filter 2 and subjected to ultraviolet treatment by the ultraviolet reactor 3 (ultraviolet irradiation section), but is not limited thereto.
  • the ballast water stored in the ballast tank 4 may be ballast water that has not been subjected to filtration and / or ultraviolet treatment.
  • the filter 2 is a cylindrical filter that filters the ballast water W1 that has flowed into the filter 2 and flows it to the outside, but is not limited thereto.
  • the filter may be a cylindrical filter that filters ballast water flowing from the outside and flows out from the inside, or may be a non-cylindrical filter.
  • Ballast water treatment device 2 Filter 3 UV reactor (UV irradiation unit) 4 Ballast tank 9 Control unit 61 Flow meter (Flow measurement unit) H1 first reference water level (reference water level) L1 line L11 line L12 line L21 line L22 line L23 line P1 pump (pressure feeding part) V11, V41 valve (flow rate adjuster) W1 treated water (ballast water) W2 filtered water (ballast water) W3, W31, W32, W33 Reservation treated water (ballast water), drainage

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Physical Water Treatments (AREA)

Abstract

Cette invention concerne un dispositif de traitement des eaux de ballast qui comprend une unité de commande qui peut commuter le mode de décharge des eaux de ballast (W3) entre un mode de décharge par pression de charge hydraulique (W3) où les eaux de ballast sont déchargées par pression hydraulique par l'intermédiaire d'une unité de rayonnement ultraviolet (3) et d'une conduite (L12) et un mode de décharge par alimentation sous pression où les eaux de ballast (W3) sont déchargées par une unité d'alimentation sous pression (P1) par l'intermédiaire de l'unité de rayonnement ultraviolet (3) et de la conduite (L12), et qui met en œuvre un procédé de décharge en mode décharge d'alimentation sous pression après mise en œuvre d'un procédé de décharge en mode décharge par pression de charge hydraulique. L'unité de commande (9) commande une unité de régulation de débit pour que le débit de l'eau circulant dans la conduite (L12) approche un débit de fixation de capacité de l'unité de rayonnement ultraviolet (3) en mode décharge par pression de charge hydraulique à partir d'un état de débit bas où le débit de l'eau circulant dans la conduite (L12) est plus bas que le débit de fixation de capacité.
PCT/JP2016/059806 2015-08-21 2016-03-28 Dispositif et procédé de traitement des eaux de ballast WO2017033487A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0619891U (ja) * 1992-04-30 1994-03-15 荏原インフィルコ株式会社 液体の殺菌装置
US20020113022A1 (en) * 2000-02-25 2002-08-22 Gadgil Ashok J. Method and apparatus for low cost water disinfection
JP2010514551A (ja) * 2006-12-27 2010-05-06 ホルガー ブラム 濾過殺菌装置
US20100314330A1 (en) * 2007-11-13 2010-12-16 Alain Picard Method and device for treating an effluent
JP2013043143A (ja) * 2011-08-25 2013-03-04 Miura Co Ltd バラスト水処理装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0619891U (ja) * 1992-04-30 1994-03-15 荏原インフィルコ株式会社 液体の殺菌装置
US20020113022A1 (en) * 2000-02-25 2002-08-22 Gadgil Ashok J. Method and apparatus for low cost water disinfection
JP2010514551A (ja) * 2006-12-27 2010-05-06 ホルガー ブラム 濾過殺菌装置
US20100314330A1 (en) * 2007-11-13 2010-12-16 Alain Picard Method and device for treating an effluent
JP2013043143A (ja) * 2011-08-25 2013-03-04 Miura Co Ltd バラスト水処理装置

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