JP2013091438A - Ballast water treating device, ship mounted with the ballast water treating device, and method of treating ballast water - Google Patents

Abstract

[PROBLEMS] To prevent the growth of a biofilm on a filtering means and realize a high flow rate during on-ballast.
A ballast water treatment apparatus according to the present invention includes a water intake means for taking water stored in a ballast tank, a filtration means for filtering water taken by the water intake means, and a regeneration means for regenerating the filtration means. A cleaning means 50 for cleaning is provided, and cleaning is performed with water containing a chemical or an active substance supplied from the killing substance supply means 40 when the filtering means 20 is cleaned by the cleaning means 50, and the contaminated water after cleaning is stored in a contaminated water tank. It is characterized by storing in 31.
[Selection] Figure 1

Description

  The present invention relates to a ballast water treatment apparatus for preventing the movement of microorganisms accompanying the pouring and discharging of ballast water, a ship equipped with this ballast water treatment apparatus, and a ballast water treatment method.

  Ballast Water Management System (BWMS) with a general active substance (active substance) added type removes large organisms (L size plankton) with a 10-50 micron mesh filter during ballast water intake. The organisms left on the mesh are returned to the intake water area along with the continuous backwash water of the filter, and the active substances are added to the filtered water containing bacteria and S-size plankton that have passed through the filter, killed, and transferred to the ballast tank. The method that leads is taken. As a result, the concentration of chemicals that are not good at killing L-size plankton can be reduced, and efforts are made to minimize the risk of secondary pollution by active substances to the environment due to corrosion of hulls and piping systems caused by active substances.

In normal sea areas, this method is effective as a means of international maritime organization (IMO) BWMS guidelines G9 (procedure for approval of ballast water management system using active substances (July 2005)) and G8 (ballast water). Many BWMSs have obtained guidelines for management system approval (July 2005).
However, because the active substances cannot be put into the seawater that passes through the filter by the above means, seawater that is rich in nutrients through rivers from land such as Tokyo Bay and Osaka Bay will change seasonal seawater temperature and tide level. For example, a biofilm which is a kind of bacteria may propagate on the filter. Once this biofilm adheres, it has a risk that it cannot be backwashed, and the filter becomes blocked, making it impossible to take in ballast water.

  On the other hand, among large tankers mainly for the transportation of crude oil, BWMS for 200,000 to 300,000 weight tons of VLCC (Very Large Crude Oil Carrier) requires at least 3000 tons / h in on-ballast. (Since ballast water is discharged, a higher flow rate is required, 6000 tons / h or more, and in some cases 10,000 tons / h), and heat recovery BWMS is a process at the time of discharge. In order to achieve this, there are some difficulties in terms of the size and price of the heat exchanger.

By the way, in patent document 1, after sterilizing the residue to a filter, it mixes with the clean water which passed the filter, and the apparatus stored as ballast water is proposed.
Further, Patent Document 2 proposes a device that circulates the liquid in the ballast water tank as cleaning water to the upstream side of the filter device and discharges the liquid after filter cleaning to the supply area of the ballast water.
Moreover, in patent document 3, the apparatus which lets a filtration apparatus pass also in the case of the waste_water | drain from a ballast tank is proposed.
Patent Document 4 proposes an apparatus that uses a chemical when cleaning a film.
Patent Document 5 proposes an apparatus for cleaning a filtration membrane using a chemical during ship navigation.
Further, Patent Document 6 proposes an apparatus that separates large-sized marine life and small-sized marine life and sterilizes the small-sized marine life.

JP 2006-102283 A JP 2007-229575 A JP 2008-212901 A JP 2009-6213 A JP 2010-94584 A International Publication No. 2008/114793

However, in patent document 1, in order to mix the sterilized residue with clean water, there exists a problem that a chemical | medical solution will be diluted with clean water and the surviving bacteria will propagate during storage. In addition, there is a risk that the growth of the biofilm on the filter cannot be effectively prevented, and the filter becomes blocked.
Further, in Patent Document 2 to Patent Document 5, when ballast water is taken, the growth of plankton and bacteria remaining on the filter cannot be suppressed, and if the time from intake to washing becomes longer, the propagation of bacteria This makes it difficult to remove the attached biofilm. In addition, since the treated wastewater separated by the filter is discharged to the sea area and only the water that has passed through the filter is used as ballast water, there is a problem that it takes time to store ballast water.
Further, in Patent Document 6, it is impossible to suppress the growth of plankton and bacteria remaining on the filter, and it becomes difficult to remove the attached biofilm.

  Accordingly, an object of the present invention is to realize a high flow rate during on-ballasting while preventing the propagation of biofilm in the filtering means.

  In the ballast water treatment apparatus according to the first aspect of the present invention, water intake means for taking water stored in the ballast tank, filtration means for filtering water taken by the water intake means, and washing for regenerating the filtration means In the ballast water treatment apparatus including the cleaning means for performing the cleaning, the cleaning means performs cleaning with water containing a chemical or an active substance when the filtering means is cleaned, and stores the contaminated water after cleaning in a contaminated water tank. According to the first aspect of the present invention, bacteria and plankton can be killed by washing the filtration means with water containing a drug or an active substance, and the growth of biofilm on the filtration means can be prevented. Can be used as ballast by storing contaminated water in a contaminated water tank.

  According to a second aspect of the present invention, in the ballast water treatment apparatus according to the first aspect, the filtration means is cleaned by the cleaning means at the time of water intake by the water intake means. According to the second aspect of the present invention, the filtration means is washed at the time of water intake by the water intake means, so that the washing can be performed continuously and the on-ballast time can be shortened because the contaminated water is used for the ballast.

  According to a third aspect of the present invention, in the ballast water treatment apparatus according to the first or second aspect, the drug or the active substance is added to the water which has been added on the upstream side of the filtering means. According to the third aspect of the present invention, by adding a drug or an active substance on the upstream side of the filtering means, the biofilm does not propagate on the filtering means, and the function deterioration of the filtering means can be prevented.

  A fourth aspect of the present invention is the ballast water treatment apparatus according to any one of the first to third aspects, further comprising a detoxifying means for detoxifying the drug or the active substance. According to this invention of Claim 4, a chemical | medical agent or an active substance can be detoxified and a contaminated water can be returned to the sea area.

  The present invention according to claim 5 is the ballast water treatment apparatus according to any one of claims 1 to 4, further comprising concentration detecting means for detecting the concentration of the drug or active substance, and the concentration of the drug or active substance. It is characterized by management. According to the present invention described in claim 5, by controlling the concentration of the drug or active substance, bacteria and plankton can be surely killed and the concentration of the drug or active substance can be appropriately managed.

  A sixth aspect of the present invention is the ballast water treatment device according to any one of the first to fifth aspects, further comprising a heat treatment means for heat treating the contaminated water stored in the contaminated water tank, and the heat treatment means performs the heat treatment. It is characterized by discharging the contaminated water to the outside. According to the present invention described in claim 6, by performing heat treatment, bacteria and plankton can be killed and, for example, when chlorine is used as an active substance, detoxification can be performed.

  A seventh aspect of the present invention is the ballast water treatment apparatus according to the sixth aspect, wherein a heat recovery type heat exchanger is used as the heat treatment means. According to the seventh aspect of the present invention, performance deterioration due to biofilm contamination of the heat exchanger can be prevented, and energy saving can be achieved by heat recovery.

  The present invention according to claim 8 is the ballast water treatment apparatus according to any one of claims 1 to 4, wherein when contaminated water is stored in the contaminated water tank, the contaminated water is contained with a high concentration chemical or active substance. Processed. According to the eighth aspect of the present invention, it is possible to kill, for example, L-size plankton, which is not killed by the drug or active substance added when the filtering means is washed. Moreover, since the efficacy of the chemicals and active substances can be reduced over time while stored in the contaminated water tank, the burden on detoxification when discharging the ballast can be reduced.

  In the ship corresponding to this invention of Claim 9, the ballast water treatment apparatus in any one of Claims 1-8 was mounted. According to the ninth aspect of the present invention, bacteria and plankton can be killed by washing the filtering means with water containing a drug or an active substance, and the growth of biofilm on the filtering means can be prevented. Can be used as ballast by storing contaminated water in a contaminated water tank.

  In the ballast water treatment method corresponding to the present invention according to claim 10, the water stored in the ballast tank is taken, the collected water is filtered by the filtering means, and the cleaning for the regeneration of the filtering means is performed by the agent or the active substance. It is characterized by washing with water containing water and storing the contaminated water after washing in a contaminated water tank. According to the present invention described in claim 10, bacteria and plankton can be killed by washing the filtering means with water containing a drug or an active substance, and the growth of biofilm on the filtering means can be prevented. Can be used as ballast by storing contaminated water in a contaminated water tank.

  The present invention according to claim 11 is the ballast water treatment method according to claim 10, wherein the filtration means is cleaned by the cleaning means when the water is taken by the water intake means. According to the present invention as set forth in claim 11, by washing the filtration means during water intake by the water intake means, the washing can be performed continuously, and the contaminated water is used for ballast, so the on-ballast time can be shortened.

  A twelfth aspect of the present invention is the ballast water treatment method according to the tenth or eleventh aspect, wherein the drug or the active substance is added to water taken upstream of the filtering means. According to the twelfth aspect of the present invention, by adding a drug or an active substance on the upstream side of the filtering means, the biofilm does not propagate on the filtering means, and the function of the filtering means can be prevented from being lowered.

  According to the present invention, bacteria and plankton can be killed by washing the filtration means with water containing a drug or an active substance, biofilm growth on the filtration means can be prevented, and contaminated water after washing can be used as contaminated water. It can be used as ballast by storing in a tank.

  In addition, when the filtration means is washed by the washing means at the time of taking water by the water intake means, the filtration means is washed at the time of taking water by the water intake means so that washing can be performed continuously and contaminated water is used for ballast. In addition, the on-ballast time can be shortened.

  In addition, when a drug or an active substance is added to the water taken upstream of the filtering means, the biofilm may propagate on the filtering means by adding the drug or the active substance upstream of the filtering means. In addition, the function of the filtering means can be prevented from being lowered.

  In addition, when a detoxifying means for detoxifying the drug or active substance is further provided, the contaminated water can be returned to the sea area by detoxifying the drug or active substance.

  In addition, a concentration detection means for detecting the concentration of the drug or active substance is further provided, and when managing the concentration of the drug or active substance, the bacteria or plankton are surely killed by controlling the concentration of the drug or active substance. In addition, it is possible to prevent the drug or the active substance from being added more than necessary.

  In addition, heat treatment means for heat treating the contaminated water stored in the contaminated water tank is further provided. When the contaminated water heat treated by the heat treatment means is discharged to the outside, the heat treatment is performed to kill bacteria and plankton. For example, when chlorine is used as an active substance, detoxification can be performed.

  Further, when a heat recovery type heat exchanger is used as the heat treatment means, performance deterioration due to biofilm contamination of the heat exchanger can be prevented, and energy saving can be achieved by heat recovery.

  In addition, when contaminated water is stored in a contaminated water tank and the contaminated water is treated with a high concentration of chemicals or active substances, plankton that is not killed by the chemicals or active substances added during the cleaning of the filtering means should be destroyed. It is possible to reduce the efficacy of chemicals and active substances over time while they are stored in the contaminated water tank, thereby reducing the burden on detoxification when discharging ballast.

Line diagram of ballast water treatment apparatus according to an embodiment of the present invention Line diagram showing the flow during on-ballasting of the same ballast water treatment system Line diagram showing the flow of the ballast water treatment system during on-ballasting (cleaning of the filtering means) Line diagram showing the flow of deballasting the ballast water treatment equipment Line diagram showing the flow during deballasting (discharge of contaminated water) of the ballast water treatment equipment Conceptual configuration diagram of filtering means with cleaning means used in the ballast water treatment apparatus Schematic configuration diagram of a ship equipped with the ballast water treatment device Line diagram of ballast water treatment apparatus according to another embodiment of the present invention.

Below, the ballast water treatment apparatus by embodiment of this invention is demonstrated.
FIG. 1 is a line diagram of a ballast water treatment apparatus according to an embodiment of the present invention, FIG. 2 is a line diagram showing a flow at the time of on-ballasting of the ballast water treatment apparatus, and FIG. 4 is a line diagram showing the flow during deballasting of the ballast water treatment apparatus, and FIG. 5 shows the flow during deballasting (discharge of contaminated water) of the ballast water treatment apparatus. FIG. 6 is a conceptual diagram of a filtration means with a cleaning means used in the ballast water treatment apparatus, and FIG. 7 is a schematic diagram of a ship equipped with the ballast water treatment apparatus.

First, the configuration of the ballast water treatment apparatus will be described with reference to FIG.
As shown in FIG. 1, the ballast water treatment apparatus of the present embodiment has a water intake means 10 for taking water (seawater), a filtration means 20 for filtering water taken by the water intake means 10, and a filtration means 20 for filtering. A ballast tank 30 for storing water, a killing substance supply means 40 for storing a drug or active substance added to the water taken by the water intake means 10, and a drug or active substance for draining the water stored in the ballast tank 30 to the sea area Decontaminating means 60 for decontaminating, contaminated water tank 31 for storing contaminated water after washing of filtering means 20, and heat treatment means 70 for heat-treating contaminated water stored in contaminated water tank 31.

The filtering means 20 in this embodiment includes a cleaning means 50 that performs cleaning for regenerating the filtering means 20.
As the water intake means 10, a ballast pump is used, and water is taken from the water intake sea chest 11 with the ballast pump.
For the filtering means 20, for example, a 10-50 micron mesh filter is used, and large organisms (L size plankton) are removed by the 10-50 micron mesh filter.
The ballast tank 30 includes a plurality of tanks, and a part of the ballast tank 30 can be used as the contaminated water tank 31.

As the killing substance supply means 40, a chemical solution tank for storing a medicine or an active substance can be used. For example, chlorine can be used as the active substance. Further, an electrolysis generator or an ultraviolet irradiator can be used for the killing substance supply means 40.
As the detoxifying means 60, a neutralization liquid tank for storing a neutralization liquid for neutralizing a drug or an active substance can be used. As the neutralization liquid, for example, sodium thiosulfate can be used. The detoxifying means 60 is used for detoxifying residual chemicals in the ballast tank 30 and also for detoxifying residual chemicals in the contaminated water tank 31. Further, the detoxifying means 60 can be a heater that blows off chlorine.
As the heat treatment means 70, a heat recovery type heat exchanger can be used. Bacteria and plankton are killed by the heat treatment in the heat treatment means 70. For example, when chlorine is used as an active substance, the killing substance can be rendered harmless.

An open / close valve V <b> 1 is provided in the pipe from the intake sea chest 11 to the intake means 10.
The piping from the on-off valve V1 to the water intake means 10 is provided with a mixing valve 91, and a water supply pipe 41 from the killing substance supply means 40 is connected to the mixing valve 91. The water supply pipe 41 is provided with a killing substance supply pump YP1.
The piping from the water intake means 10 to the filtration means 20 is provided with an open / close valve V2.
A switching valve 92 is provided in the pipe from the water intake means 10 to the opening / closing valve V <b> 2, and a drain pipe 82 to the drain sea chest 81 is connected to the switching valve 92. The drain pipe 82 is provided with an open / close valve V3.

  The outlet of the filtering means 20 is connected to the ballast tank 30 by piping. A branch valve 93 is provided in the pipe connecting the filtering means 20 and the ballast tank 30, and a branch pipe 83 to the backwash pump 51 is connected to the branch valve 93. In addition, although this embodiment demonstrates as the branch valve 93, the branch valve 93 may be a switching valve. When the branch valve 93 is used, the filtration means 20 can be washed while continuously taking water into the ballast tank 30. When a switching valve is used instead of the branch valve 93, the ballast The filtration means 20 can be washed when the water intake to the tank 30 is stopped.

The outlet of the backwash pump 51 is connected to the filtering means 20 by a cleaning pipe 84.
A discharge pipe 85 is connected to the filtering means 20, supplied by the cleaning pipe 84, and the contaminated water after washing the filtering means 20 is stored in the contaminated water tank 31 by the discharge pipe 85.
The contaminated water tank 31 and the heat treatment means 70 are connected by a pipe 86, and a pipe 87 on the downstream side of the heat treatment means 70 is connected to a switching valve 94.
The switching valve 94 is provided in a pipe between the branch valve 93 and the ballast tank 30.
A switching valve 95 is provided in the pipe between the branch valve 93 and the switching valve 94.

A switching valve 96 is provided in the pipe between the mixing valve 91 and the water intake means 10.
The switching valve 95 and the switching valve 96 are connected by a pipe 88.
The pipe 88 is provided with an open / close valve V4. A mixing valve 97 is provided in the pipe 88 from the on-off valve V4 to the switching valve 96.
A pipe 61 from the detoxifying means 60 is connected to the mixing valve 97, and the pipe 61 is provided with a pump YP2.

The heat treatment means 70 includes a pump 71, a heat recovery type heat exchanger 72, and a heat exchanger 73. The contaminated water led out from the contaminated water tank 31 by the pump 71 is absorbed by the heat recovery heat exchanger 72 and then further heated by the heat exchanger 73, and then dissipated by the heat recovery heat exchanger 72 to the pipe 87. Derived.
The heat exchanger 73 is heated by the heat source means 74. The heat source means 74 is connected to the heat exchanger 73, the condensate tank 75, and the circulation pump 76 in an annular shape by piping, and the heat medium circulates in the piping. As the heat source means 74, an auxiliary boiler or an exhaust heat recovery silencer is used.

The ballast water treatment apparatus of this embodiment includes a concentration detection means 98 that detects the concentration of the drug or active substance on the downstream side of the mixing valve 91.
The concentration detection means 98 is preferably provided in a pipe from the water intake means 10 to the filtration means 20. In particular, by providing it between the water intake means 10 and the switching valve 92, it is possible to detect the concentration even during deballasting.
The ballast water treatment apparatus according to the present embodiment includes the concentration detection unit 98, thereby managing the concentration of the drug or active substance and adjusting the drug or active substance supplied from the killing substance supply unit 40.

Next, the flow at the time of on-ballast of a ballast water treatment apparatus is demonstrated using FIG.
The water taken from the water intake sea chest 11 by the water intake means 10 is filtered by the filter means 20 and then stored in the ballast tank 30.
At the time of water intake, the chemical or active substance of the killing substance supply means 40 is added to the water from the mixing valve 96.
Therefore, mixing of the water to which the drug or active substance is added is promoted by the water intake means 10 and reaches the filtration means 20.

At the time of on-ballast, the on-off valve V1 and the on-off valve V2 are opened, and the on-off valve V3 and the on-off valve V4 are closed.
At the time of on-ballasting, the switching valve 94 closes the flow to the pipe 87, and the switching valve 96 closes the flow to the pipe 88.
Since the concentration detection means 98 is provided on the downstream side of the water intake means 10, the drug or the active substance is stirred by the water intake means 10, and a stable concentration can be detected.

In this way, since the water that has reached the filtering means 20 is added with a drug or an active substance, bacteria and plankton can be killed and biofilm growth on the filtering means 20 can be prevented.
Further, by detecting the concentration of the drug or active substance by the concentration detection means 98 and managing the concentration of the drug or active substance, it is possible to surely kill bacteria and plankton and add more drug or active substance than necessary. This can be prevented.

Next, the flow at the time of on-ballasting of the ballast water treatment apparatus (cleaning of the filtering means) will be described with reference to FIG.
3 is described separately from FIG. 2 in order to explain the flow at the time of cleaning the filtering means 20, but in this embodiment, since the branch valve 93 is used, the flow of FIG. 2 and the flow of FIG. Done at the same time.

A portion of the water that has been taken from the water intake sea chest 11 by the water intake means 10 and filtered by the filtration means 20 is returned from the branch valve 93 to the filtration means 20 by the backwash pump 51.
The chemical or active substance of the killing substance supply means 40 is added to a part of the water after being filtered by the filtration means 20.

At the time of on-ballast, the on-off valve V1 and the on-off valve V2 are opened, and the on-off valve V3 and the on-off valve V4 are closed.
At the time of on-ballasting, the switching valve 94 closes the flow to the pipe 87, and the switching valve 96 closes the flow to the pipe 88.
Water supplied to the cleaning pipe 84 and reaching the filtering means 20 is cleaned by the cleaning means 50 by the cleaning means 50, and the contaminated water after cleaning the filtering means 20 is stored in the contaminated water tank 31 by the discharge pipe 85. It is done.
Since the chemical or active substance is added to this contaminated water, bacteria and plankton can be killed and biofilm growth on the filtering means 20 can be prevented.

Next, the flow at the time of deballasting of a ballast water treatment apparatus is demonstrated using FIG.
Ballast water in the ballast tank 30 is discharged from the drainage sea chest 81 through the pipe 88 and the drain pipe 82 by the water intake means 10.
At the time of discharging the ballast water, a neutralizing solution for neutralizing the drug or active substance is supplied from the detoxifying means 60 and added to the water from the mixing valve 97.
The ballast water can be returned to the sea area by detoxifying the drug or the active substance with the neutralizing solution supplied from the detoxifying means 60.

At the time of deballasting, the on-off valve V1 and the on-off valve V2 are closed, and the on-off valve V3 and the on-off valve V4 are opened.
At the time of deballasting, the switching valve 95 and the switching valve 96 are connected to the pipe 88.

Next, the flow at the time of deballasting (discharge of contaminated water) of the ballast water treatment apparatus will be described with reference to FIG.
The contaminated water in the contaminated water tank 31 is discharged from the pipe 86 through the heat treatment means 70 by the pump 71, and the heat-treated contaminated water is drained through the switching valve 94, the switching valve 95, the pipe 88 and the drain pipe 82. It is discharged from the sea chest 81.
Bacteria and plankton can be killed by heat treatment by the heat treatment means 70, and can be rendered harmless, for example, when chlorine is used as an active substance.
Further, when discharging the ballast water, a neutralizing solution for neutralizing the drug or the active substance is supplied from the detoxifying means 60 and added to the water from the mixing valve 97.
The ballast water can be returned to the sea area by detoxifying the drug or the active substance with the neutralizing solution supplied from the detoxifying means 60.

At the time of deballasting, the on-off valve V1 and the on-off valve V2 are closed, and the on-off valve V3 and the on-off valve V4 are opened.
At the time of deballasting, the switching valve 95 and the switching valve 96 are connected to the pipe 88.
In the present embodiment, the drainage from the ballast tank 30 and the drainage from the contaminated water tank 31 are described separately. However, the drainage from the ballast tank 30 and the drainage from the contaminated water tank 31 are performed simultaneously. You can also.

Next, the configuration of the filtering means with cleaning means used in the ballast water treatment apparatus will be described with reference to FIG.
The filtering means 20 is composed of a cylindrical filter member 21, and filtration is performed by introducing water from the outer peripheral portion of the filter member 21 to the inner peripheral portion.
As the filter member 21, for example, a laminate of ring-shaped disks, or a member constituted by a wire mesh, a notch wire, or a nonwoven fabric is used.

The cleaning means 50 is composed of partition walls 52 and 53 for partitioning part of the filter member 21 and flowing backwash water, and a motor (not shown) for rotating the filter member 21. The pair of partition walls 52 partition the inside of the filter member 21, and the pair of partition walls 53 partition the outside of the filter member 21.
The cleaning pipe 84 is connected to an area partitioned by the pair of partition walls 52, and the discharge pipe 85 is connected to an area partitioned by the pair of partition walls 53.

With the above configuration, except for the region surrounded by the pair of partition walls 53, water taken from the water intake sea chest 11 is introduced into the filter member 21, and water to which a drug or an active substance is added is filtered through the filter member 21. Water is led out to the ballast tank 30 from a region other than the region surrounded by the pair of partition walls 52.
On the other hand, in the region surrounded by the pair of partition walls 52, water to which a drug or an active substance is added is introduced into the filter member 21 from the cleaning pipe 84, and the contaminated water after cleaning the filter member 21 is From the region surrounded by the pair of partition walls 53, the water is led to the contaminated water tank 31 through the discharge pipe 85.
As the filter member 21 rotates, dirt on the filter member 21 during filtration is continuously washed.

Next, the structure of the ship carrying a ballast water treatment apparatus is demonstrated using FIG.
On the stern 2 side of the hull 1, heat source means 74 configured by an auxiliary boiler, an exhaust heat recovery silencer, and the like is disposed.
The contaminated water in the contaminated water tank 31 is guided by the pump 71 to the heat recovery type heat exchanger 72 and the heat exchanger 73 and heat-treated. The heat-treated contaminated water is heated by the heat recovery heat exchanger 72 before the heat treatment. Therefore, in the heat exchanger 73, heat corresponding to the heat loss may be supplemented from the heat source means 74.

  Hereinafter, a ballast water treatment apparatus according to another embodiment of the present invention will be described. FIG. 8 is a line diagram of the ballast water treatment apparatus. The same functional members as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted.

The ballast water treatment apparatus shown in FIG. 8 includes a high-concentration sterilizing substance supply unit 100 instead of the heat treatment unit 70 in the above embodiment.
When a drug is used as the high-concentration sterilizing substance supply unit 100, it is also possible to receive a high-concentration chemical solution from the above-mentioned killing substance supply unit 40.
The high-concentration sterilizing substance supply means 100 stores a high-concentration drug or active substance to be added to the contaminated water stored in the contaminated water tank 31. Here, the high-concentration drug or active substance supplied from the high-concentration sterilizing substance supply means 100 is a concentration that kills L-size plankton that is not killed by the concentration of the drug or active substance added from the killing substance supply means 40. Or active substance. For example, when the concentration of chlorine added from the killing substance supply means 40 is 5 ppm, the concentration of hydrochloric acid added from the high-concentration sterilizing substance supply means 100 is 30 ppm.
The discharge pipe 85 from the filtering means 20 to the contaminated water tank 31 is provided with a mixing valve 99, and the water supply pipe 101 from the high concentration sterilizing substance supply means 100 is connected to the mixing valve 99. The water supply pipe 101 is provided with a high concentration killing substance supply pump YP3.

The ballast water treatment apparatus according to this embodiment is configured to discharge a high concentration drug or active substance from the high concentration sterilization substance supply means 100 during the on-ballast (washing of the filtration means) shown in FIG. Add to flowing contaminated water.
Further, the ballast water treatment apparatus in the present embodiment switches the polluted water to the pipe 87 by the pump 71 from the pipe 86 at the time of deballasting (discharge of the contaminated water) of the ballast water treatment apparatus shown in FIG. The water is discharged from the drainage sea chest 81 through the valve 94, the switching valve 95, the pipe 88 and the drain pipe 82. If it is desired to omit the pump 71, the pump 71 can be discharged through a normal piping system connected to each ballast tank.

According to the present embodiment, it is possible to kill, for example, L size plankton, which is not killed by the drug or active substance added when the filtering means 20 is washed. Further, it is possible to reduce the efficacy of the medicine and the active substance over time while storing in the contaminated water tank 31.
In the ballast water treatment apparatus shown in FIG. 8, the high concentration sterilization substance supply unit 100 is described in place of the heat treatment unit 70 in the above embodiment, but the high concentration sterilization substance supply unit 100 is used together with the heat treatment unit 70. May be.

  As described above, in the present embodiment, the water intake means 10 for taking the water stored in the ballast tank 30, the filtration means 20 for filtering the water taken by the water intake means 10, and the cleaning for performing the cleaning for regenerating the filtration means 20. A cleaning means 50 for cleaning the filtering means 20 with water containing a drug or an active substance, and storing the contaminated water in the contaminated water tank 31 according to the present embodiment. Bacteria and plankton can be killed by washing the filtration means 20 with water containing a drug or an active substance, and the growth of biofilm on the filtration means 20 can be prevented, and the washed contaminated water is stored in the contaminated water tank 31. It can be used as a ballast.

  Further, according to the present embodiment, the cleaning of the filtering means 20 by the cleaning means 50 is performed at the time of water intake by the water intake means 10 so that the cleaning can be performed continuously, and the on-ballast time is set in order to use the contaminated water for the ballast. Can be shortened.

  In addition, according to the present embodiment, by adding the drug or the active substance to the water upstream of the filtering unit 20, the biofilm does not propagate on the filtering unit 20, and the functional deterioration of the filtering unit 20 can be prevented. .

  Moreover, according to this embodiment, the harmless means 60 which sanitizes a chemical | medical agent or an active substance is further provided, and polluted water can be returned to the sea area by detoxifying a chemical | medical agent or an active substance.

  In addition, according to the present embodiment, the concentration detection means 98 for detecting the concentration of the drug or active substance is further provided, and by controlling the concentration of the drug or active substance, bacteria and plankton can be surely killed and the drug or active substance can be killed. Can be prevented from being added more than necessary.

  Moreover, according to this embodiment, the heat treatment means 70 which heat-processes the contaminated water stored in the contaminated water tank 31 is further provided, and bacteria and plankton are killed by discharging the contaminated water heat-treated by the heat treatment means 70 to the outside. In addition, for example, when chlorine is used as an active substance, detoxification can be performed.

  Further, according to the present embodiment, by using the heat recovery type heat exchanger 72 as the heat treatment means 70, energy saving can be achieved by heat recovery.

  The present invention is a ballast water treatment apparatus particularly suitable for large tankers mainly intended for transport of crude oil, a ship equipped with this ballast water treatment apparatus, and a ballast water treatment method.

DESCRIPTION OF SYMBOLS 10 Water intake means 20 Filtration means 30 Ballast tank 31 Contaminated water tank 40 Killing substance supply means 50 Cleaning means 60 Detoxification means 70 Heat treatment means 72 Heat recovery type heat exchanger 98 Concentration detection means

Claims (12)

  In a ballast water treatment apparatus comprising water intake means for taking water stored in a ballast tank, filtration means for filtering the water taken by the water intake means, and washing means for performing washing to regenerate the filtration means, A ballast water treatment apparatus, wherein washing is performed with water containing a drug or an active substance when the filtering means is washed by the washing means, and the contaminated water after washing is stored in a contaminated water tank.   The ballast water treatment apparatus according to claim 1, wherein the filtering unit is cleaned by the cleaning unit at the time of water intake by the water intake unit.   3. The ballast water treatment apparatus according to claim 1, wherein the drug or the active substance is added to the taken water at an upstream side of the filtering unit.   The ballast water treatment apparatus according to any one of claims 1 to 3, further comprising a detoxifying means for detoxifying the drug or the active substance.   The ballast water treatment according to any one of claims 1 to 4, further comprising concentration detection means for detecting the concentration of the drug or the active substance, and performing concentration management of the drug or the active substance. apparatus.   The heat treatment means for heat-treating the contaminated water stored in the contaminated water tank is further provided, and the contaminated water heat-treated by the heat treatment means is discharged to the outside. The ballast water treatment apparatus as described.   The ballast water treatment apparatus according to claim 6, wherein a heat recovery type heat exchanger is used as the heat treatment means.   The ballast water treatment apparatus according to any one of claims 1 to 4, wherein when the contaminated water is stored in the contaminated water tank, the contaminated water is treated with a high concentration chemical or active substance.   A ship equipped with the ballast water treatment device according to any one of claims 1 to 8.   The water stored in the ballast tank is taken, the collected water is filtered by a filtering means, and the washing for regeneration of the filtering means is washed with water containing a drug or an active substance to contaminate contaminated water after washing. A ballast water treatment method characterized by storing in a water tank.    The ballast water treatment method according to claim 10, wherein the filtering unit is cleaned by the cleaning unit at the time of water intake by the water intake unit.   The ballast water treatment method according to claim 10 or 11, wherein the drug or the active substance is added to the water taken in the upstream side of the filtering means.