JP2007160154A - Jellyfish treatment system on ocean - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jellyfish treatment system on the ocean capable of inexpensively and fundamentally treating jellyfishes intruding into a water intake port of a power plant or the like without installing any special disposal facility. <P>SOLUTION: The jellyfishes intruding into the water intake port are induced by a curtain wall 12, vertical nets 14, 16 and a bottom net 18, and the induced jellyfishes are transferred alive to an on-ocean jellyfish storing tank 30 by a jellyfish collecting barge 20, a suction hose 22 and a fish pump 24. The jellyfish storing tank 30 is composed of nets and set at a place near the water intake port having a sea water current, therefore, stored jellyfishes keep moving continuously to loose weight, adhere to the net, destructed, dissolved into sea water and disappear. The jellyfish storing tank 30 is provided with a water quality monitoring sensor 40 and a jellyfish amount monitoring sensor 50. When the water quality standards in the tank cannot be maintained, or when the amount of jellyfish exceeds a treating capacity, a land collection selector valve 26 is switched to the land collection side, to collect jellyfishes in a land jellyfish collection vessel 60. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a system for processing a jellyfish that enters a seawater intake port of a power plant or the like, and particularly relates to an offshore processing system for a jellyfish that processes a jellyfish that is a processing target on the ocean without landing.

  In thermal power plants, nuclear power plants, and the like, seawater is used as cooling water, but floating organisms such as jellyfish are taken into the intake port for taking in seawater. For this reason, if a large amount of jellyfish is generated, the dust remover that removes the dust from the taken seawater will be overloaded and cause a failure. There was a problem that it occurred.

  For this reason, conventionally, jellyfish were collected before the dust remover, the collected jellyfish were landed, drained in a land storage tank, and treated as industrial waste. This is because the law on the prevention of marine pollution and marine disasters prohibits the landing of jellyfish once landed in the ocean, and some municipalities are obligated to treat the landed jellyfish as industrial waste. Because. For this reason, the processing of the jellyfish has required a great cost every year.

  In addition, even if it is permitted to dispose of the landed jellyfish in the facility, it was conventionally disposed with a hole in the digging, but if the landed jellyfish is left untreated, it will rot and give off a foul odor. In addition, due to the problem of environmental pollution caused by sewage, it has become obligatory to dispose of concrete with a concrete layer in accordance with the strengthening of waste disposal laws. However, if the concrete layer is disposed and discarded, the initial volume reduction effect cannot be obtained, so a large-scale disposal facility is required, and an increase in the cost required for the jellyfish disposal process is inevitable.

  On the other hand, as a system for treating jellyfish near the water intake without performing such waste treatment, a jellyfish collection net is provided near the water intake, and the collected jellyfish are sucked with a pump and transferred to the ocean. A method (for example, Patent Document 1) and a method for chemically processing the captured jellyfish by crushing (for example, Patent Document 2) have been proposed.

Japanese Patent Laid-Open No. 05-118019 JP 2004-097928 A

However, as in Patent Document 1, in the method of transferring the collected jellyfish to the ocean, the absolute amount of the generated jellyfish cannot be reduced, and the jellyfish transferred to the ocean again enters the water intake. Therefore, there was a problem that it was not a drastic solution.
Moreover, in the method of crushing and chemically treating the captured jellyfish as in Patent Document 2, a special treatment facility is required, and in order to treat the treated waste water so as to satisfy the drainage standard. There was a problem that a great deal of cost was required.

  Therefore, an object of the present invention is to provide a system for drastically treating jellyfish entering a water intake port of a power plant or the like at a low cost without providing a special waste treatment facility.

The offshore processing system for jellyfish according to the present invention includes an offshore jellyfish storage tank for storing jellyfish in seawater on the ocean, jellyfish guiding means for guiding jellyfish near the intake, and jellyfish induced by the jellyfish guiding means on the ocean. A jellyfish transfer means that sucks and transfers the jellyfish alive alive to the offshore jellyfish storage tank.The jellyfish induced by the jellyfish induction means is stored in the offshore jellyfish storage tank without being landed and killed. It melts and disappears.
Jellyfish occupy approximately 95% or more of moisture, and have the property of being dissolved and extinguished when killed in seawater. The inventor pays attention to this, and the jellyfish near the water intake are naturally extinguished by storing them in the jellyfish storage tank on the ocean without landing, reducing the cost of waste disposal while complying with laws and regulations. It is an idea.
According to this invention, the jellyfish that has entered the vicinity of the water intake is guided by the jellyfish guiding means, transferred to the offshore jellyfish storage tank without being landed by the jellyfish transfer means, and stored in seawater in the offshore jellyfish storage tank. The jellyfish that entered near the water intake can be treated on the ocean without violating laws such as marine pollution and marine disaster prevention laws. Cost can be greatly reduced.
The offshore jellyfish storage tank stores jellyfish in seawater on the sea, and the seawater in the tank is replaced with seawater outside the tank. Naturally disappear.
In addition, it has been confirmed by experiments that jellyfish stored in the offshore jellyfish storage tank disappear in about 5 days, and that a predetermined drainage standard can be secured by keeping the jellyfish in the tank below a certain density.

Further, in the jellyfish offshore processing system of the present invention, the offshore jellyfish storage tank is partly or entirely formed of a net-like member that does not allow jellyfish to pass but allows seawater to pass, and near the intake port. The jellyfish stored and disposed at a position having the flow of seawater are stuck to the net-like member to be damaged and disappear at an early stage.
According to the present invention, part or all of the offshore jellyfish storage tank is formed of a net-like member that allows seawater to pass without passing through the jellyfish, and is disposed at a position having the flow of seawater near the intake. The jellyfish that have been forced to move against the flow of the seawater lose weight, and the jellyfish with reduced kinetic force sticks to the downstream meshwork and is destroyed by contact with the meshwork. The time required for the disappearance of the jellyfish inside is shortened. Moreover, since the seawater in a tank is always forcedly replaced by the flow of seawater, the deterioration of the water quality accompanying the death of a jellyfish is reduced. As a result, the processing efficiency of the recovered jellyfish is improved, and it is possible to cope with the invasion of a large amount of jellyfish.

In the jellyfish offshore treatment system according to the present invention, the offshore jellyfish storage tank has minute irregularities on a part or all of the surface of the net-like member, and damages the jellyfish stuck to the net-like member at an early stage. It is made to let you.
According to the present invention, since the surface of the net of the offshore jellyfish storage tank is provided with minute irregularities, the damage caused by the contact of the jellyfish attached to the net with the net is promoted, and the jellyfish in the tank disappears. The period required for is shortened. Thereby, the processing efficiency of the collected jellyfish is further improved, and it is possible to cope with the invasion of a larger amount of jellyfish.

Further, in the jellyfish offshore processing system according to the present invention, the offshore jellyfish storage tank is formed in a bowl shape in which a part or all of the upper surface is opened, and a range of a predetermined depth from the sea surface among the net-like members on the side surface. It is provided with a weathering means for weathering a part or the whole of the inner surface.
According to the present invention, part or all of the inner surface within the range of a predetermined depth from the sea surface of the mesh member on the side surface of the offshore jellyfish storage tank is lined by the weathering means, so that the stored jellyfish are near the sea surface. Odor generation due to sticking to a net-like member and dying can be prevented.

In the jellyfish offshore processing system according to the present invention, the offshore jellyfish storage tank includes jellyfish levitation restraining means for preventing the jellyfish from rising above a predetermined depth from the sea surface.
According to this invention, the jellyfish stored in the offshore jellyfish storage tank is prevented from rising above a predetermined depth by the jellyfish levitation suppression means, so that the stored jellyfish float and die near the sea surface. Odor can be prevented from being generated.

In the jellyfish offshore processing system according to the present invention, the offshore jellyfish storage tank includes water quality monitoring means for monitoring the water quality in the tank, and the jellyfish transporting means has a predetermined water quality in the tank being monitored. In the case where the standard cannot be maintained, there is provided a transfer destination switching means for switching to a land jellyfish collection container separately provided with a jellyfish transfer destination.
According to this invention, the water quality in the offshore jellyfish storage tank is monitored by the water quality monitoring means, and when the water quality in the tank cannot maintain a predetermined standard, the destination of the jellyfish is transferred to the shore jellyfish collection container by the transfer destination switching means. Since switching is performed, deterioration of water quality in the offshore jellyfish storage tank can be prevented in advance, and maintenance management can be performed so as to always meet a predetermined water quality standard.

Further, in the jellyfish offshore processing system according to the present invention, the offshore jellyfish storage tank includes a jellyfish amount monitoring means in the tank for monitoring the amount of jellyfish in the tank, and the jellyfish transfer means is in the tank being monitored. When the amount of the jellyfish exceeds the reference value, there is provided a transfer destination switching means for switching to a land jellyfish collection container separately provided with a jellyfish transfer destination.
According to this invention, the amount of jellyfish in the offshore jellyfish storage tank is monitored by the jellyfish amount monitoring means in the tank, and when the amount of jellyfish in the tank exceeds the reference value, the transfer destination of the jellyfish is transferred by the transfer destination switching means. Is switched to the onshore jellyfish collection container, so that the amount of jellyfish that can be treated in the offshore jellyfish reservoir can be maintained and managed.

Further, in the jellyfish offshore processing system of the present invention, the jellyfish amount monitoring means in the tank is provided with a floating body that is slightly heavier than seawater in the jellyfish storage tank and on which the jellyfish cannot ride, and the floating state of the floating body Is used to monitor the amount of jellyfish in the tank.
According to this invention, the jellyfish amount monitoring means in the tank is composed of a floating body having a specific gravity slightly heavier than seawater. Because it is configured, when the amount of jellyfish increases, it is pushed up to the sea surface by the movement of jellyfish. Therefore, the amount of jellyfish in the offshore jellyfish storage tank can be monitored easily and intuitively because the floating body has surfaced on the sea surface.

In addition, the jellyfish offshore processing system of the present invention was guided by a plurality of offshore jellyfish storage tanks for storing jellyfish in seawater on the ocean, jellyfish guiding means for guiding jellyfish near the intake, and the jellyfish guiding means. A jellyfish transporting means that sucks jellyfish offshore and transports the jellyfish alive to any of the plurality of offshore jellyfish storage tanks. The jellyfish induced by the jellyfish guiding means is stored in the offshore jellyfish storage tank and killed. Each of the offshore jellyfish storage tanks is provided with water quality monitoring means for monitoring the water quality in the tank, and the jellyfish transporting means transports the jellyfish. When the water quality in the tank in the offshore jellyfish storage tank cannot maintain the predetermined standard, other offshore jellyfish where the water quality in the tank maintains the predetermined standard Those having the transfer destination switching means for switching the Tomeso.
According to the present invention, a plurality of offshore jellyfish storage tanks are provided, the water quality in each offshore jellyfish storage tank is monitored by the water quality monitoring means, and the water quality in the offshore jellyfish storage tank to which the jellyfish is transferred is predetermined. When the standard cannot be maintained, the transfer destination switching means switches the jellyfish transfer destination to another storage tank where the water quality in the tank maintains the specified standard, so even if a large number of jellyfish attack In addition, it is possible to configure a jellyfish treatment system capable of preventing deterioration of the water quality of each offshore jellyfish storage tank and maintaining and managing the jellyfish storage tank so as to always meet a predetermined water quality standard.

In addition, the jellyfish offshore processing system of the present invention was guided by a plurality of offshore jellyfish storage tanks for storing jellyfish in seawater on the ocean, jellyfish guiding means for guiding jellyfish near the intake, and the jellyfish guiding means. A jellyfish transporting means that sucks jellyfish offshore and transports the jellyfish alive to any of the plurality of offshore jellyfish storage tanks. The jellyfish induced by the jellyfish guiding means is stored in the offshore jellyfish storage tank and killed. Each of the offshore jellyfish storage tanks is provided with tank jellyfish amount monitoring means for monitoring the amount of jellyfish in the tank, and the jellyfish transporting means is a jellyfish transporting means. When the amount of jellyfish in the tank in the offshore jellyfish storage tank that transports the jellyfish exceeds the reference value, the amount of jellyfish in the tank that does not exceed the reference value Those having the transfer destination switching means for switching the offshore jellyfish reservoir.
According to this invention, a plurality of offshore jellyfish storage tanks are provided, the amount of jellyfish in each offshore jellyfish storage tank is monitored by the jellyfish amount monitoring means in the tank, and the amount of jellyfish in the destination storage tank by the jellyfish transfer means If the jellyfish exceeds the reference value, the transfer destination switching means switches the jellyfish transfer destination to another offshore jellyfish storage tank in which the amount of jellyfish in the tank does not exceed the reference value. The jellyfish processing system that can be maintained and managed so as not to exceed the amount of jellyfish that can be processed in each offshore jellyfish reservoir can be configured.

Further, in the jellyfish offshore processing system according to the present invention, the jellyfish guidance means includes guidance jellyfish amount monitoring means for monitoring the amount of jellyfish being guided, and the amount of the jellyfish being monitored exceeds a predetermined value. In this case, it has a function of operating the jellyfish transfer means.
According to this invention, the amount of jellyfish induced by the induced jellyfish amount monitoring means is monitored, and when the amount of induced jellyfish exceeds a predetermined value, the jellyfish transfer means is operated. A jellyfish processing system that operates appropriately according to the amount of invasion of the can be configured.

Further, in the jellyfish offshore processing system according to the present invention, the jellyfish guiding means enters a curtain wall that prevents the jellyfish from entering from the sea surface to a predetermined depth offshore with respect to the water intake, and enters below the curtain wall. Among the jellyfish, a vertical net that mainly guides the jellyfish that floats and enters the vicinity of the sea surface to the jellyfish transfer means, and a bottom net that mainly guides a jellyfish that moves straight under the curtain wall to the jellyfish transfer means. It is equipped with.
According to the present invention, the jellyfish entering the surface near the sea surface out of the jellyfish that has entered mainly from a deeper position than the curtain wall by the vertical network is prevented by the curtain wall from directly entering the jellyfish from the sea surface to a predetermined depth. Of the jellyfish that have entered mainly from deeper than the curtain wall by the bottom net, and the jellyfish that travels straight without rising to the sea surface is guided to the jellyfish transporting means. Since the clogging of the guiding means is suppressed, the maintenance burden is reduced, and the jellyfish entering the water intake can be efficiently guided to the jellyfish transporting means.

  According to the present invention, there is an effect that jellyfish entering a water intake of a power plant or the like can be drastically processed at a low cost without providing a special disposal processing facility.

  The above object, other objects, features, and advantages of the present invention will become more apparent from the following description of the best mode for carrying out the invention with reference to the drawings.

FIG. 1 shows a schematic configuration diagram of a jellyfish offshore processing system according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a water intake port, and cooling seawater is sucked in the direction of the arrow.
Reference numeral 10 denotes a steel pipe pile provided offshore, and a curtain wall 12 is installed on the steel pipe pile 10. 14 and 16 are vertical meshes, and two are provided from two locations of the steel pipe pile 10 toward the jellyfish recovery platform ship 20. Reference numeral 18 denotes a bottom net, which is provided in a triangle formed by the vertical nets 14 and 16 from the sea bottom toward the jellyfish recovery platform ship 20.
2 is a view taken along the line AA in FIG. 1, and FIG. 3 is a view taken along the line BB in FIG. As shown in the figure, the curtain wall 12 is provided at a depth of about 10 m from the sea surface on the offshore side of the steel pipe pile 10. The vertical nets 14 and 16 cover a depth of about 2 m from the sea surface, and the bottom net 18 is formed with a triangular slope from the sea bottom toward the jellyfish collection platform ship 20.
As a result of the investigation, about 80% of the jellyfish entering under the curtain wall 12 surfaced near the sea surface and headed to the intake, and the remaining 20% was the seabed. It is because it was confirmed that it went straight ahead and headed to the water intake. The vertical nets 14 and 16 were used to guide the jellyfish that floated and entered near the sea surface. The bottom net 18 was used for this purpose.

  20 is a jellyfish collection trolley for collecting jellyfish guided by the vertical meshes 14 and 16 and the bottom mesh 18 on the ocean, 22 is a suction pipe for sucking jellyfish collected by the jellyfish collection trolley 20, and 24 is jellyfish collection. A fish pump for sucking the jellyfish collected by the carrier 20 into the suction pipe 22 and transferring the jellyfish alive to the offshore jellyfish storage tank, 26 transfers the sucked jellyfish to the offshore jellyfish storage tank or an onshore jellyfish collection container The on-shore recovery switching valve that switches whether the jellyfish sucked by the fish pump 24 is drained when draining the jellyfish sucked by the fish pump 24 into the offshore jellyfish storage tank, and 29 is the shore jellyfish that sucks the jellyfish sucked by the fish pump 24 It is a separator that performs separation when thrown into a collection container.

30 is an offshore jellyfish storage tank for storing the recovered jellyfish in the seawater offshore, and is installed at a position where there is a flow of seawater near the water intake. In this embodiment, since the water intake 1 is on the upper right side of the figure, the sea water always flows in a generally upper right direction, so that the sea water in the tank is always forcibly replaced.
The offshore jellyfish storage tank 30 is provided with a water quality monitoring sensor 40 for monitoring the water quality in the tank, and constantly monitors so that the water quality in the tank satisfies a predetermined drainage standard.
Further, the offshore jellyfish storage tank 30 is provided with an in-tank jellyfish amount monitoring sensor 50 for monitoring the amount of jellyfish stored in the tank, and does not exceed the amount that can be processed by the jellyfish stored in the tank. To monitor.

  Reference numeral 60 denotes an onshore jellyfish collection container for collecting on the land when the collected jellyfish cannot be transferred to the offshore jellyfish reservoir 30. Thereby, when the jellyfish invades beyond the limit that can be processed in the offshore jellyfish storage tank 30, the recovered jellyfish is recovered in the land jellyfish recovery container 60 in an emergency evacuation and processed by predetermined industrial waste processing. Can do.

  Reference numeral 80 denotes a control panel installed on the site, which is equipped with a FA (Factory Automation) PC (Personal Computer) (not shown), a control function for starting and stopping the fish pump 24, the water quality monitoring sensor 40 and the inside of the tank It has a function of confirming information from the jellyfish amount monitoring sensor 50 on site, a function of communicating with a PC (not shown) of a management office, and the like.

FIG. 4 shows an embodiment of the offshore jellyfish storage tank 30. In the figure, (a) is a plan view and (b) is a side view. The offshore jellyfish storage tank in this embodiment is a rectangular parallelepiped tank having a width of 10 m, a depth of 10 m, and a height of 2.5 m, which is formed of a net that does not allow the target jellyfish to pass through, and the seawater sufficiently circulates. Float 32 is attached around and floated on the sea surface. In order to maintain the shape of the tank, a metal chain 34 is provided as a weight around the bottom surface.
The volume of the offshore jellyfish storage tank of this example is about 250 m ³ . This is based on the result of checking the quality change until dissolved storing the jellyfish that of live jellyfish and killed to the test reservoir of 1 m ^3, the water quality in the tank at the maximum of the jellyfish infestation to be assumed, Even in the worst case, it is set so as to satisfy a predetermined drainage standard.
In this example, a nylon fish net having an opening of about 30 mm was used as the net forming the tank. Nylon fishnets with small (about 12 mm), medium (about 30 mm), and large (about 50 mm) openings, and metal expanded metal with a maximum of 44 mm, a minimum of 18 mm, and a side of about 22 mm. When the difference in weight loss effect of jellyfish was investigated by producing a ginger with a side of 1 m, it was considered inappropriate for jellyfish with a large opening of the jellyfish, but significant for others. It is confirmed that there is no difference.
The jellyfish contained in the tank are swimming along the reflux (immediately after the containment), but when they are weakened, they gradually hit the downstream net. At this time, the jellyfish is not washed away, and the body (umbrella) is pulsated upstream. The jellyfish beat while being pressed against the net by the water flow, so the edge of the umbrella wears. The thick central part of the umbrella remains attached to the net, and small fish such as horse mackerel and kingfisher prey on it. Eventually, jellyfish lose their pulsation and dissolve quickly when they die.

In the offshore jellyfish storage tank 30 of this embodiment, as shown in FIG. 4 (b), a sheeting 36 is provided on the inner side of the side surface of the mesh from the sea surface to a certain depth. This is to prevent the jellyfish stored in the tank from sticking to the net near the sea surface and dying, so that the jellyfish can be treated without causing a bad odor to the neighborhood. It has become possible.
In addition, barnacles and algae adhere to the sheet when installed in the sea, and it is necessary to wash it with jet water, etc., so a durable tent fabric with a thickness of 1 mm and little elongation was adopted in consideration of durability. .
The color of the sheet was blue so that it would match seawater when seen from the land and dirt would not stand out.
The method of fixing the sheet to the offshore jellyfish storage tank is to provide eyelet holes on the top and sides, and to fix the rope directly below the float 32 that floats the storage tank, and to provide a bag-like fold on the bottom. In addition, a rod-shaped weight was installed in it, and it could be used without being fixed to the storage tank. Thereby, a sheet | seat can be easily attached or detached from the water with respect to an offshore jellyfish storage tank.
Four such sheets are used and installed on the inner surface of the tank so that the side faces overlap each other by about 30 cm to prevent the flow from the seam.
Moreover, about the width | variety of the sheet | seat, when the sheet | seat was provided in about 1/3 of the height of the storage tank, the case where the sheet | seat was provided in about 2/3 of the height of the storage tank, the sheet | seat was provided in the whole surface. When the difference in the jellyfish weight reduction effect was confirmed for the four cases when the case and the seat were not provided, the highest weight reduction effect was obtained when the seat was provided at about 1/3 of the height of the storage tank. In addition, since it is desirable that the state where the jellyfish sticks to the net from the land is difficult to see, the height of the storage tank is set to 90 cm, which is about 1/3 of the height of 2.5 m.
By installing a sheet near the surface of the water, the seawater flowing together with the jellyfish from the transfer pump can return to the surface layer, which provides an optimal flow environment for taking advantage of the jellyfish. Further, since the surface water flow is blocked by the sheet and flows into the lower layer, gentle convection in the vertical direction can be made on the surface layer in the tank. Furthermore, on the downstream side, the water blocked by the sheet flows into the lower layer, so that the jellyfish density is increased in the vicinity of the downstream network. Experiments have confirmed that the jellyfish weight loss rate is higher as the accommodation density is higher, and has an effect of increasing the weight loss rate as compared with the case where there is no sheet.

In the tank, a water quality monitoring sensor 40 is provided on the downstream side where the water quality condition is considered to be the most severe. The tank water quality monitoring sensor 40 used here is a battery-type water quality monitoring probe having an automatic data log function. Water temperature, salinity (conductivity), pH (pH), DO (dissolved oxygen), ORP (redox) Potential), ammonia, turbidity, etc. The measurement frequency is once per hour, and calibration is performed twice a month.
The water quality monitoring probe has a Windows (registered trademark) control function, is connected to the FA PC in the control panel 80, and monitors the water quality in the tank in real time by remote control from the control panel 80. Measurement conditions can be set and recorded data can be collected. In addition, a mobile phone is connected to the PC for FA, and the water quality in the tank can be monitored in real time by remote operation from the management office by calling from the PC of the management office, and the measurement conditions Settings and data collection can also be performed.
In this case, the water quality monitoring sensor 40 is provided only at the downstream center where the water quality conditions are considered to be the most severe. However, water quality sensors may be provided at other locations to monitor the water quality.

Further, a tank jellyfish amount monitoring sensor 50 for monitoring the amount of jellyfish in the tank is provided in the tank. The tank jellyfish amount monitoring sensor 50 used here emits ultrasonic waves at a wide angle from the sea surface in the tank to detect a reflected signal from the jellyfish. In order to prevent malfunction due to noise, 50 KHz and 200 KHz. The two-wavelength type is used. Further, the jellyfish amount monitoring sensors 50 in the tank are provided at four locations near the sea surface in order to cover the entire area in the tank.
Here, the tank jellyfish amount monitoring sensors 50 are provided at four locations. However, more sensors may be provided as necessary, and if one sensor can determine the amount of jellyfish in the tank. One may be sufficient.
In addition, the control panel is provided with a waterproof web camera so that the jellyfish storage state in the offshore jellyfish storage tank can be remotely monitored from a management office or the like.

When it is confirmed that the jellyfish are guided to the jellyfish guiding networks 14, 16, and 18 by the system as described above, the fish pump 24 is activated, and the induced jellyfish is collected and transferred to the offshore jellyfish storage tank. Naturally disappear by storing.
As shown in the figure, everything from the jellyfish guidance means to the offshore jellyfish storage tank is installed on the ocean, and jellyfish are processed offshore without landing, so that they do not violate laws such as the Act on the Prevention of Marine Pollution and Marine Disasters. The jellyfish that has entered the vicinity of the intake can be treated, and the cost of waste treatment can be greatly reduced.
The onshore recovery switching valve 26 is normally set on the offshore jellyfish storage tank side. However, when it is determined that the water quality monitored by the water quality monitoring sensor 40 cannot maintain a predetermined standard, the amount of jellyfish in the tank When it is determined that the amount of jellyfish in the tank monitored by the monitoring sensor 50 exceeds the limit that can be processed, the jellyfish transfer destination is switched to the land jellyfish collection container side.
As a result, the recovered jellyfish are usually processed offshore within a range that satisfies the specified drainage standards, and only when the jellyfish strikes beyond the processing capacity, the jellyfish are recovered in the land collection container and the specified industrial waste. Processing can be performed.

In the above-described embodiment, an ultrasonic sensor is used as the jellyfish amount monitoring sensor 40 in the tank. However, for example, a transmission type optical sensor is used, and the fact that the amount of transmitted light in the tank varies depending on the amount of jellyfish. You may make it detect.
In addition, as a sensor for monitoring the amount of jellyfish in the tank, a load sensor is provided at the base of the rope that pulls and fixes the offshore jellyfish storage tank from the surroundings, and the amount of jellyfish in the tank is estimated from the measured load. You may make it do. This is based on the fact that the load applied to the tank increases as the number of jellyfish stored in the tank increases, and the correlation data between the amount of jellyfish in the tank and the load applied to the rope is acquired in advance. It is registered, and the amount of jellyfish in the tank is estimated from the measured load using the registered correlation data. By using such a load sensor, it is not necessary to install the sensor directly in the tank, and erroneous detection and maintenance burden due to sensor contamination, etc. are reduced, and the amount of jellyfish in the tank can be monitored stably. .
In addition, in order to monitor the amount of jellyfish in the tank, the following simpler method can be used.

FIG. 5 shows another embodiment of the jellyfish amount monitoring sensor in the tank. This is a floating body on which a jellyfish cannot ride, and a buoy 52 having a slightly higher specific gravity than seawater is used, and this is fixed to the bottom of the tank using a rope 54. When there are few jellyfishes, the buoy 52 is not visible from the land because it is sinking in the tank as in (1). However, when the amount of jellyfish increases, the jellyfish dig into the buoy 52 and accumulate as shown in (2). When a certain amount or more of jellyfish is accumulated, the buoy 52 is pushed up as shown in (3), and the rope 54 is extended so that the buoy is visually recognized from the land. Thus, in the jellyfish amount monitoring sensor of this embodiment, the amount of jellyfish can be intuitively determined based on whether or not a buoy serving as a mark is visually recognized from the land.
As shown in FIG. 6, the amount of jellyfish in the tank can be comprehensively determined by appropriately arranging the buoy 52 in the tank. Here, when the offshore jellyfish storage tank is arranged in a place having a flow of seawater, it is considered that more jellyfish are gathered on the downstream side, and therefore, it is preferable to arrange more buoys 52 on the downstream side.
The buoy 52 may be anything as long as the specific gravity is slightly heavier than seawater and the jellyfish cannot ride on it. For example, the resin is formed into a cone, pyramid, bowl, bell or the like. It may be a thing, and the same shape may be formed in a cage shape by a net or the like.
The jellyfish amount monitoring sensor of this embodiment is designed so that a person can intuitively see from the land, but a water depth detector is provided on the buoy 52 or the rope 54 and is remotely monitored via the control panel 80. You may be able to do it.

In the above embodiment, in order to prevent the bad odor caused by the jellyfish stored in the offshore jellyfish storage tank sticking to the net near the sea surface and dying, it is within a certain depth range from the sea surface of the side net. As shown in FIG. 7, a ceiling net 30T is provided on the upper surface of the storage tank, and this is submerged to a certain depth from the sea surface so that the jellyfish stored in the tank are above the certain depth. You may not be able to ascend. In this case, a hole through which the pipe 28a through which the jellyfish is transferred is provided in the ceiling net 30T, and the collected jellyfish is directly injected into the tank.
In addition, a range of a certain depth from the sea surface on the side surface of the offshore jellyfish storage tank may be formed using a member that does not stick to the jellyfish, or formed using a member that blocks the flow of seawater. The same effect may be achieved.
It should be noted that the weathering does not necessarily have to be provided on the entire periphery of the side surface of the offshore jellyfish reservoir, and may be provided only on the downstream side surface on which the jellyfish sticks and is likely to die.

In the above embodiment, the fish pump 24 is started by a person judging the amount of jellyfish induced by the jellyfish guiding networks 14, 16, 18. However, the fish pump 24 is provided with a sensor for monitoring the amount of induced jellyfish. The fish pump may be automatically started.
In addition, the land recovery switching valve 26 is determined by a person to switch the state of the tank water quality monitoring sensor 40 and the tank jellyfish amount monitoring sensor 50. However, the land recovery switching valve is an electric valve, and signals from each sensor. Automatic switching may be performed based on the above.

FIG. 8 shows a schematic configuration diagram of an offshore processing system for jellyfish according to another embodiment of the present invention. In the figure, curtain wall 12, vertical nets 14, 16, bottom net 18, jellyfish recovery trolley 20, suction pipe 22, fish pump 24, land recovery switching valve 26, draining separators 28A and 28B, separator 29, land jellyfish recovery container 60 and the control panel 80 are equivalent to the above-mentioned embodiment.
In this embodiment, two offshore jellyfish storage tanks similar to those of the above embodiment are provided at a position where the flow of seawater near the intake port is provided (30A and 30B), an offshore recovery switching valve 27 is provided, and the fish pump 24 The recovered jellyfish can be switched to either the offshore jellyfish reservoir 30A or 30B.
Each offshore jellyfish storage tank 30A, 30B is provided with water quality monitoring sensors 40A, 40B and tank jellyfish amount monitoring sensors 50A, 50B, respectively, and the measurement signal is transmitted to the FA PC of the control panel 80. .
A guidance jellyfish amount monitoring sensor 70 for monitoring the amount of guided jellyfish is provided in the vicinity of the jellyfish guidance networks 14, 16, 18, and a measurement signal is transmitted to the FA PC of the control panel 80. . The induction jellyfish amount monitoring sensor 70 can be the same type as the in-tank jellyfish amount monitoring sensor. In addition, here, a case where sensors are provided at five locations is illustrated, but a larger number of sensors may be provided as necessary, and one sensor covering a wide range may be provided.
In this embodiment, both the onshore recovery switching valve 26 and the offshore recovery switching valve 27 are electrically operated valves and can be remotely operated from the control panel 80.

FIG. 9 shows an example of a control flow by the FA PC mounted on the control panel 80 of the jellyfish offshore processing system according to the above embodiment.
First, a measured value of the induced jellyfish amount is obtained from the induced jellyfish amount monitoring sensor 70 (S100), and when the induced jellyfish amount becomes larger than a predetermined value (S102), the fish pump is activated (S104).
Next, the water quality measurement value and the jellyfish amount measurement value are respectively acquired from the water quality monitoring sensor 40 and the tank jellyfish amount monitoring sensor 50 of the offshore jellyfish storage tank currently set as the transfer destination (S106), and the water quality is within the standard. Yes (S108), and if the amount of jellyfish is within the standard (S110), the recovered jellyfish shall be processed in the offshore jellyfish storage tank, and the land recovery switching valve 26 is set on the land recovery side. In the case (S112), switching to the offshore collection side (S114).
Then, the measured value of the induced jellyfish amount is obtained again from the induced jellyfish amount monitoring sensor 70 (S116). If the induced jellyfish amount is still larger than the predetermined value (S118), the process is repeated from S106. If the induced jellyfish amount becomes smaller than the predetermined value in S118, the fish pump 24 is stopped (S120) and the process returns to the beginning.
If the water quality is not within the standard at S108 or the jellyfish amount is not within the standard at S110, the water quality measurement value and the jellyfish amount measurement from the water quality monitoring sensor 40 and the tank jellyfish amount monitoring sensor 50 of the other offshore jellyfish storage tanks. When the values are acquired (S122), the water quality is within the standard (S124), and the jellyfish amount is also within the standard (S126), the offshore recovery switching valve 27 is switched to the other offshore jellyfish reservoir (S128). ), The process returns to S112.
If the water quality is not within the standard in S124 or the amount of jellyfish is not within the standard in S126, the collected jellyfish is collected on land, and the land collection switching valve 26 is set on the offshore collection side. In the case (S130), switching to the land recovery side (S132). And it returns to S116 and repeats a process.
Note that the amount of jellyfish in the tank may be determined by estimating the total amount of jellyfish in the tank from the measured values of each sensor, and when any sensor reaches the reference value, the storage limit is determined. You may do it. Similarly, in the case of the induced jellyfish amount monitoring sensor 70, the total amount of jellyfish induced from the measured values of each sensor may be estimated and judged. If any of the sensors reaches a predetermined value, recovery is performed. The processing may be started.
In addition, the measurement value of each sensor may be determined based on a numerical value at the time of measurement, but an average within a certain period may be used in consideration of variations in the measurement value. Moreover, you may make it provide the function which can respond beforehand by estimating and measuring the future measured value from the transition of the past measured value.
With the control system as described above, a system that can efficiently process a large amount of jellyfish can be configured without deteriorating water quality even when jellyfish attack one after another.

In the above embodiment, the jellyfish collection networks 14, 16, and 18 are provided only on the right side of the water intake 1, but this is because most jellyfish enter from the right side in the power plant installed this time. Therefore, the position and range in which the jellyfish guiding network is provided, and the form of the jellyfish guiding network may be appropriately set according to the environmental conditions of the installation location.
In addition, the offshore jellyfish storage tank is provided with both a water quality monitoring sensor and a jellyfish amount monitoring sensor. However, if the purpose is only to confirm that a predetermined drainage standard is secured, the amount of jellyfish in the tank The monitoring sensor may be omitted. Moreover, when a predetermined drainage standard is ensured by regulating the amount of jellyfish in the tank, the water quality monitoring sensor may be omitted.
Further, when the offshore jellyfish storage tank has a sufficient processing capacity for jellyfish that invade in large quantities, the land recovery switching valve 26, the separator 29, and the land jellyfish recovery container 60 may be omitted.

In the above embodiment, the offshore jellyfish storage tank is formed using a net, and is placed at a position where there is a flow of seawater near the water inlet, so that the stored jellyfish is stuck to the net and is damaged. However, in order to further enhance the weight loss effect by such a netting, the netting may be subjected to uneven processing. As such uneven processing, for example, a fine granular material may be fixed to the surface of the netting by adhesion or the like.
The offshore jellyfish storage tank does not necessarily need to be formed of netting, and other members may be used as long as seawater is sufficiently circulated without passing the jellyfish to be processed. For example, it may be formed using a plate-like body having a hole such as punching metal or expanded metal, or may be formed using a mesh-like member. Further, a net may be used partially, and for example, only the downstream side surface that is likely to be killed by sticking jellyfish may be formed of the net.
When the offshore jellyfish storage tank is formed with a plate with a hole, for example, by providing minute irregularities on the inner surface by embossing etc., the weight loss effect due to sticking and damaging the jellyfish will be enhanced It may be.

As described above, according to the present invention, it is possible to configure a system that drastically treats jellyfish entering a water intake port of a power plant or the like at a low cost without providing a special disposal processing facility.
Note that the present invention is not limited to the above-described embodiments, and as long as the effects of the present invention are achieved, the constituent elements described in the respective embodiments are appropriately replaced, new constituent elements are added, or a part thereof It goes without saying that the constituent elements may be deleted.

It is a schematic block diagram of the jellyfish offshore processing system concerning one Embodiment of this invention. It is an AA arrow line view of FIG. It is a BB arrow line view of FIG. It is a schematic block diagram which shows one Example of an offshore jellyfish storage tank. It is a principle figure which shows one Example of a jellyfish amount monitoring sensor. It is a figure which shows the example of arrangement | positioning of the jellyfish amount monitoring sensor. It is a schematic block diagram which shows the other Example of an offshore jellyfish storage tank. It is a schematic block diagram of the jellyfish offshore processing system concerning other embodiment of this invention. It is a control flow figure of the jellyfish offshore processing system concerning other embodiments of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water intake 10 Steel pipe pile 12 Curtain wall 14,16 Vertical network 18 Bottom network 20 Jellyfish collection trolley 22 Suction pipe 24 Fish pump 26 Land recovery switching valve 27 Offshore recovery switching valve 28 Draining separator 29 Separator 30 Offshore jellyfish storage tank 32 Float 34 Metal Chain 40 Tank Water Quality Monitoring Sensor 50 Tank Jellyfish Amount Monitoring Sensor 52 Conical Buoy 54 Rope 60 Land Jellyfish Recovery Container 70 Guide Jellyfish Amount Monitoring Sensor 80 Control Panel

Claims (12)

An offshore jellyfish storage tank for storing jellyfish in seawater offshore;
Jellyfish inducing means for inducing jellyfish near the water intake,
Jellyfish guided by the jellyfish inducing means is aspirated on the ocean, and jellyfish transporting means for transporting the jellyfish alive to the offshore jellyfish storage tank,
The jellyfish offshore processing system characterized in that the jellyfish induced by the jellyfish inducing means is stored in the offshore jellyfish reservoir without being landed and killed, and dissolved in seawater to disappear.   The offshore jellyfish storage tank is partly or entirely formed of a net-like member that does not allow jellyfish to pass through, but allows seawater to pass through, and is disposed at a position having a flow of seawater near the water intake. The jellyfish offshore processing system according to claim 1, wherein the jellyfish stuck to the net-like member is damaged and destroyed so as to disappear at an early stage.   The said offshore jellyfish storage tank is provided with minute irregularities on a part or all of the surface of the net-like member so as to quickly destroy the jellyfish stuck to the net-like member. The offshore processing system for jellyfish according to 2.   The offshore jellyfish storage tank is formed in a saddle shape in which a part or all of the upper surface is opened, and is a weathering means for scoring a part or all of the inner surface within a predetermined depth from the sea surface among the side net-like members. The jellyfish stored in the offshore jellyfish storage tank is prevented from generating a bad odor by sticking to a net-like member near the sea surface and dying. 5. The jellyfish offshore processing system described in 1.   The offshore jellyfish storage tank is provided with a jellyfish levitation restraining means for preventing the jellyfish from rising above a predetermined depth from the sea surface, and the jellyfish stored in the offshore jellyfish storage tank generate a bad odor by floating near the sea surface. The jellyfish offshore processing system according to claim 2 or 3, wherein the occurrence is prevented. The offshore jellyfish storage tank comprises water quality monitoring means for monitoring the water quality in the tank,
The jellyfish transfer means comprises a transfer destination switching means for switching to a land jellyfish collection container separately provided with a transfer destination of jellyfish when the water quality in the tank being monitored cannot maintain a predetermined standard. The jellyfish offshore processing system according to any one of claims 1 to 5. The offshore jellyfish storage tank includes a tank jellyfish amount monitoring means for monitoring the amount of jellyfish in the tank,
The jellyfish transfer means includes a transfer destination switching means for switching to a land jellyfish collection container separately provided with a jellyfish transfer destination when the amount of jellyfish in the tank being monitored exceeds a reference value. A jellyfish offshore processing system according to any one of claims 1 to 5.   The tank jellyfish amount monitoring means includes a floating body that has a specific gravity slightly heavier than seawater and cannot carry jellyfish in the offshore jellyfish storage tank, and monitors the amount of jellyfish in the tank according to the floating state of the floating body. The jellyfish offshore processing system according to claim 7, wherein A plurality of offshore jellyfish storage tanks for storing jellyfish in seawater on the ocean;
Jellyfish inducing means for inducing jellyfish near the water intake,
A jellyfish transporting means for sucking the jellyfish induced by the jellyfish guiding means offshore and transporting them alive to any of the plurality of offshore jellyfish storage tanks;
The jellyfish induced by the jellyfish inducing means is stored in the offshore jellyfish storage tank without being landed and killed, dissolved in seawater and extinguished,
Each offshore jellyfish storage tank includes water quality monitoring means for monitoring the water quality in the tank,
The jellyfish transporting means is configured such that when the water quality in the tank in the offshore jellyfish storage tank that is transferring the jellyfish cannot maintain a predetermined standard, the water quality in the tank maintains the predetermined standard. An offshore processing system for jellyfish, comprising transfer destination switching means for switching to the offshore jellyfish storage tank. A plurality of offshore jellyfish storage tanks for storing jellyfish in seawater on the ocean;
Jellyfish inducing means for inducing jellyfish near the water intake,
A jellyfish transporting means for sucking the jellyfish induced by the jellyfish guiding means offshore and transporting them alive to any of the plurality of offshore jellyfish storage tanks;
The jellyfish induced by the jellyfish inducing means is stored in the offshore jellyfish storage tank without being landed and killed, dissolved in seawater and extinguished,
Each of the offshore jellyfish storage tanks is provided with tank jellyfish amount monitoring means for monitoring the amount of jellyfish in the tank,
When the amount of jellyfish in the tank in the offshore jellyfish storage tank that is transferring the jellyfish exceeds a reference value, the amount of the jellyfish in the tank does not exceed the reference value. An offshore processing system for jellyfish, comprising transfer destination switching means for switching to another offshore jellyfish storage tank.   The jellyfish inducing means is provided with induced jellyfish amount monitoring means for monitoring the amount of jellyfish being induced, and has a function of operating the jellyfish transporting means when the amount of the monitored jellyfish exceeds a predetermined value. The jellyfish offshore processing system according to any one of claims 1 to 10, characterized by comprising:   The jellyfish guiding means includes a curtain wall that prevents jellyfish from entering from a sea surface to a predetermined depth offshore with respect to the water intake, and a jellyfish that floats and enters near the sea surface among jellyfish that enter under the curtain wall. A vertical net that mainly guides the jellyfish to the jellyfish transfer means, and a bottom net that mainly guides the jellyfish that travels straight out of the jellyfish entering the lower part of the curtain wall to the jellyfish transfer means. The jellyfish offshore processing system according to any one of claims 1 to 11.

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