JP2013053448A - Jellyfish discharge system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce costs associated with jellyfish disposal, by removing foreign matter, which is contained in seawater taken in by a deep water intake system, by means of a dust collector and returning jellyfishes, which are contained in the foreign matter, alive into the sea.SOLUTION: A jellyfish discharge system 1 includes: a curtain wall 10 which forms an intake area A by surrounding a water area on the periphery of an intake facility; a dust collector 14 which removes foreign matter from seawater taken in by an intake 5a of an intake facility 5; and a discharge passage 16 for carrying jellyfishes, which are contained in the foreign matter, into the sea. A net 12 for dividing the intake area A into first and second areas A1 and A2 and regulating the movement of the jellyfishes between the areas is installed in the curtain wall 10. The intake 5a is positioned in the first area A1. A wall surface part 10a of the curtain wall 10 has a height up to a tide level at full tide. The discharge passage 16 makes the jellyfishes discharged into the second area A2. The jellyfishes from the discharge passage 16 are stored in the second area A2. The jellyfishes in the second area A2 are discharged to the outside of the intake area A by the ebb tide after the full tide.

Description

  The present invention relates to a jellyfish discharge system that returns jellyfish contained in foreign matter removed from seawater supplied to power generation facilities and the like to the sea.

  Conventionally, when supplying seawater to a power generation facility or the like, foreign substances contained in the seawater, such as seafood such as seaweed, small fish, shellfish, and jellyfish, are removed using a dust remover. And the seawater from which the foreign material was removed by the dust remover is supplied to the power generation equipment.

  Conventionally, jellyfish removed by a dust remover has been treated as general waste. For this reason, they are disposed of by incineration, incineration, drying after shredding with a cutter pump, detoxification with a jellyfish processing device, and release. However, most jellyfish are moisture and cannot be treated even if they are carried in large quantities to the incinerator. Moreover, in order to dry after shredding with a cutter pump, a large drying space is required, and a foul odor is generated during drying. In addition, detoxification by the jellyfish processing apparatus and the release of the jellyfish processing apparatus are expensive in terms of both installation costs and running costs.

  Therefore, conventionally, a technique has been proposed in which the jellyfish removed by the dust remover is returned to the sea alive, thereby reducing the costs associated with jellyfish processing (Patent Document 1).

JP 2010-270560 A

  By the way, there is a conventional deep water intake system using curtain walls as a seawater intake system. In this method, a bay located in front of the power plant on the coastal area is surrounded by a curtain wall, and clean water at relatively low temperatures is surrounded by a curtain wall from the opening formed at the bottom of the bottom of the curtain wall. In this area, seawater in this area is taken and supplied to the power plant equipment.

  However, in the deep water intake system, when the jellyfish removed by the dust remover is returned to the sea alive as in Patent Document 1, if the jellyfish is discharged into the area surrounded by the curtain wall, the jellyfish will return to the intake port again. The possibility of entering and returning to the dust remover is increased. For this reason, it is necessary to discharge the jellyfish outside the area surrounded by the curtain wall. However, in this case, equipment for transporting the jellyfish removed by the dust remover outside the area surrounded by the curtain wall is necessary, and the installation cost may be high.

  The present invention has realized that the foreign matter contained in the seawater taken by the deep water intake method is removed by a dust remover, and the jellyfish contained in the foreign matter is returned to the sea alive, thereby reducing the cost for processing the jellyfish. The purpose is to provide a jellyfish release system.

  In order to achieve the above object, the present invention has the following configuration.

  (1) A wall surface portion that forms a water intake region surrounding a water region around the water intake facility that takes in seawater supplied to the power generation facility, and a water region outside the water intake region and the water intake region formed at a lower portion of the wall surface portion. A curtain wall having an inflow / outflow part for allowing seawater to flow in and out, a dust remover for removing foreign matter from the seawater taken by the water intake facility, and a discharge channel for transporting jellyfish contained in the foreign matter to the sea. In the jellyfish discharge system, the water intake area on the curtain wall is divided into a first area where the water intake of the water intake equipment is arranged and a second area where the water intake of the water intake equipment is not arranged. Installing a mesh member that restricts the movement of the jellyfish between the first region and the second region, wherein the wall surface is a height from the sea bottom to a tide level at high tide, and the mesh member is a lower part Is only on the seabed The upper part is located above the upper end of the wall surface part, the discharge channel discharges jellyfish into the second region, the second region stores jellyfish discharged from the discharge channel, The jellyfish discharge system is characterized in that the jellyfish in the two areas are discharged outside the intake area through the inflow / outflow portion by a lower tide after high tide.

  According to (1), the water intake area surrounded by the curtain wall is divided into a first area where the intake port of the water intake facility is arranged by a net-like member and the other second area, and the water intake facility is the first area. Take water from. The jellyfish contained in the foreign matter removed by the dust remover from the seawater taken from the water intake facility is discharged to the second region through the discharge channel. In the second region, the jellyfish discharged through the discharge channel are stored. Then, the jellyfish in the second region are discharged into the sea from the inflow / outflow portion of the curtain wall by the low tide after the high tide. In this way, when a dust remover removes foreign matter from seawater taken by a deep-water intake system using curtain walls, the jellyfish contained in the foreign matter is returned to the sea alive, thereby treating the jellyfish. It becomes possible to reduce the expense concerning.

  (2) The jellyfish discharge system according to (1), wherein the discharge channel includes a filter for separating jellyfish from foreign substances.

  According to (2), the release of foreign matter other than jellyfish into the second region is reduced.

  (3) The jellyfish discharge system according to (1) or (2), wherein the mesh member comprises a lattice fence.

  According to (3), while the jellyfish stored in the second area is restricted from moving to the first area, the seawater can be moved from the second area to the first area. For this reason, the water intake facility can take water in the entire water intake area.

  (4) In (1) to (3), a jellyfish discharge system is characterized in that an opening to which the jellyfish can move is formed in the upper part of the wall surface surrounding the second region.

  According to (4), since the opening is formed in the upper part of the wall surface, the jellyfish floating near the upper end of the curtain wall at high tide can easily move out of the water intake area through the opening. As a result, the jellyfish can be efficiently discharged from the second region to the ocean by the low tide after high tide.

  According to the present invention, the foreign matter contained in the seawater taken by the deep water intake method is removed by the dust remover, and the jellyfish contained in the foreign matter is returned to the sea alive, thereby reducing the cost for processing the jellyfish. It becomes possible.

It is explanatory drawing which shows the outline | summary of the jellyfish discharge | release system 1 in one Embodiment of this invention. It is the figure which expanded the jellyfish discharge system 1 vicinity of FIG. FIG. 3 is a cross-sectional view taken along line XX in FIG. 2 showing the configuration of the curtain wall 10. It is a figure which shows the movement path | route of a jellyfish. It is explanatory drawing which shows the other structure of the curtain wall.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory view showing an outline of a jellyfish discharge system 1 according to an embodiment of the present invention, and FIG. 2 is an enlarged view of the vicinity of the jellyfish discharge system 1 of FIG. The jellyfish discharge system 1 is a system that discharges jellyfish taken together with seawater by water intake equipment 5 for taking in seawater supplied to the power generation facility to the sea again. The curtain wall 10 and a net 12 corresponding to a net-like member are used. And a dust remover 14 and a discharge channel 16.

  The curtain wall 10 is provided so as to surround a water area of a cove where power generation facilities face, and is for introducing relatively clean seawater in the vicinity of the seabed into a water intake area A surrounded by the curtain wall 10. A water intake facility 5 (see FIG. 1) and a dust remover 14 are installed on the land side of the curtain wall 10.

  As shown in FIG. 1, the water intake facility 5 includes a water intake 5a, a water intake pump 5b, and a water intake pipe 5c. The intake port 5a is connected to the intake port 5a, and an intake pipe 5c is connected to the power generation facility. Then, by driving the intake pump 5b, seawater is taken from the intake 5a, and the taken seawater is supplied to the condenser of the power generation facility through the intake pipe 5c. Here, the condenser is, for example, one that cools and condenses steam for rotating a turbine connected to a generator, and seawater supplied by the water intake facility 5 is used for cooling the steam. .

  As shown in FIG. 2, the net 12 is installed in the curtain wall 10 and divides the water intake area A surrounded by the curtain wall 10 into a first area A1 and a second area A2. The net 12 is formed of a lattice-like fence, and seawater can move in the first area A1 and the second area A2, but movement of the jellyfish is restricted. Moreover, the water intake 5a exists in 1st area | region A1, and does not exist in 2nd area | region A2.

  The dust remover 14 removes foreign matters contained in seawater taken from the water intake 5a. Most of the foreign substances contained in seawater are seafood and seaweed. In particular, jellyfish are often included as foreign matter in the summer.

  As shown in FIG. 2, the discharge channel 16 is a water channel that conveys the foreign matter removed by the dust remover 14 toward the second region A2. The discharge channel 16 is provided with a fence 16a (see FIG. 2) corresponding to a filter. The jellyfish contained in the foreign matter passes through the fence 16a, and the movement of other foreign matters is restricted by the fence 16a. As a result, jellyfish are separated from the foreign matter removed by the dust remover 14 and discharged into the second region A2.

  FIG. 3 is a cross-sectional view taken along line XX of FIG. 2 showing the configuration of the curtain wall 10. The curtain wall 10 includes a wall surface portion 10a and an inflow / outflow portion 10b. The wall surface portion 10a is configured by stacking cylindrical bodies. Moreover, the wall surface part 10a is installed so that the surrounding water area of water intake equipment may be enclosed, and the water intake area A (refer FIG. 2) is formed.

  The inflow / outflow portion 10b is a through-hole formed by extracting a cylindrical body near the seabed in the wall surface portion 10a. Deep sea water at the bottom of the sea flows into the intake area A through the inflow / outflow portion 10b. Seawater in the water intake area A is taken from the water intake 5a (see FIG. 2) and supplied to the power generation facility, but the seawater that has been taken in flows into the water intake area A through the inflow / outflow part 10b.

  The curtain wall 10 is set to a height from the seabed to the average high tide level in the area where the power generation facility is constructed. The net 12 is partitioned from the sea floor at a position higher than the curtain wall 10. For this reason, the invasion of the jellyfish from the ocean into the water intake area A is regulated by the curtain wall 10.

  The height of the net 12 is set higher than the upper end of the curtain wall 10. For this reason, the movement of the jellyfish from the second area A2 to the first area A1 shown in FIG. In addition, since there exists a possibility that a shellfish and seaweed may adhere to the net | network 12, and it is desirable for the net | network 12 to be exchangeable.

  Next, the movement path of the jellyfish will be described with reference to FIG. Fig. 4 (a) shows the state of the jellyfish release system 1 in the time zone of the rising tide from low tide to high tide, and Fig. 4 (b) shows the state of the jellyfish release system 1 in the time of the low tide from high tide to low tide. Show.

  Foreign matter contained in seawater taken from the water intake 5a is removed by the dust remover 14. The foreign matter removed by the dust remover 14 is transferred to the discharge channel 16. The foreign matter transferred to the discharge channel 16 is sent to the second region A2 side by the water flow. Here, unevenness is formed on the bottom surface of the discharge channel 16, for example, shellfish and small fish are restricted from moving by this unevenness, but movement of mollusks such as jellyfishes is difficult to be restricted by the unevenness, While the foreign matter flows through the discharge channel 16, the jellyfish and other seafood are separated. When the foreign matter reaches the fence 16a, the jellyfish contained in the foreign matter passes through the fence 16a and is discharged into the second region A2. The movement of other seafood is restricted by the fence 16a as a filter, and is accumulated near the fence 16a. The foreign matter accumulated in the vicinity of the fence 16a is appropriately removed from the discharge channel 16 by the worker.

  As shown in FIG. 4A, the jellyfish released to the second region A2 are stored alive in the second region A2 in a time period until high tide is reached. Then, when the low tide starts after the high tide, the jellyfish are discharged from the inflow / outflow portion 10b of the curtain wall 10 into the sea by the waves and the low tide that have entered the intake area A.

  The jellyfish discharged from the water intake area A to the outside sea area moves in a direction away from the curtain wall 10 due to the lower tide. For this reason, the jellyfish discharged from the water intake area A to the outside sea area rarely enters the water intake area A again through the inflow / outflow portion 10 b of the curtain wall 10.

  According to the present embodiment configured as described above, the water intake area A surrounded by the wall surface portion 10a of the curtain wall 10 is replaced with the first area A1 in which the water intake 5a of the water intake facility 5 is arranged by the net 12. Dividing into other 2nd area | region A2, the water intake equipment 5 takes water from 1st area | region A1. The jellyfish contained in the foreign matter removed from the seawater taken from the water intake facility 5 by the dust remover 14 is discharged to the second region A2 via the discharge flow path 16. In the second region A2, jellyfish discharged through the discharge channel 16 are stored. And the jellyfish in 2nd area | region A2 is discharged to the sea area outside the intake area A through the inflow / outflow part 10b of the curtain wall 10 by the low tide after high tide. In this way, when the dust remover 14 removes foreign matter from the seawater taken by the deep water intake system using the curtain wall 10, the jellyfish contained in the foreign matter is returned to the sea alive, and the jellyfish This makes it possible to reduce the costs associated with the processing.

  Moreover, according to this embodiment, by providing the discharge channel 16 with the fence 16a for separating jellyfish from foreign matter, it is possible to reduce the release of foreign matter other than jellyfish into the second region A2.

  Further, according to the present embodiment, the net 12 is made of a lattice-like fence, whereby the jellyfish stored in the second area A2 is restricted from moving to the first area A1, while the second area A2 The seawater can move from the first area A1 to the first area A1. For this reason, the water intake facility 5 can take water in the entire water intake area A.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. For example, the curtain wall 10 according to the present embodiment has a configuration in which cylindrical bodies are spread, but other configurations may be used as long as the curtain wall is used in a deep water intake system. Moreover, you may form in the upper part of the wall surface part 10a surrounding 2nd area | region A2 in the curtain wall 10 the opening part which a jellyfish can move.

  Specifically, as shown in FIG. 5A, a rectangular opening 10 c whose longitudinal direction extends in the horizontal direction is formed in the upper part of the curtain wall 10. Alternatively, as shown in FIG. 5B, a concave opening 10 c whose longitudinal direction extends in the horizontal direction is formed in the upper part of the curtain wall 10. Here, the vertical width of the opening 10c may be set to a change in the tide level corresponding to the time zone in which the jellyfish should pass through at the time of low tide after high tide. The change in tide level varies depending on the region and season. For example, if the tide level changes by about 15 cm per hour, the vertical tide H from the upper end of the curtain wall 10 to the bottom of the opening 10c is set to 45 cm. After three hours, the jellyfish in the second region A2 are easily discharged through the opening 10c due to the lower tide.

  With this configuration, the jellyfish floating near the upper end of the curtain wall 10 can easily move out of the water intake area A through the opening 10c, and the jellyfish can be moved to the second area A2 by the low tide after high tide. It is possible to move efficiently from sea to ocean.

DESCRIPTION OF SYMBOLS 1 Jellyfish discharge system 5 Water intake equipment 5a Water intake 5b Water intake pump 5c Water intake pipe 10 Curtain wall 10a Wall surface part 10b Outflow / inflow part 10c Opening part 12 Net 13a Fence 14 Dust remover 16 Drain flow path 16a Fence

Claims (4)

A wall surface portion that forms a water intake region surrounding a water area around the water intake facility that takes in seawater supplied to the power generation facility, and a lower portion of the wall surface portion, between the water intake region and a water region outside the water intake region. A curtain wall having an inflow / outflow part for flowing seawater in and out,
A dust remover for removing foreign matter from the seawater taken by the water intake facility;
A jellyfish discharge system comprising a discharge channel for conveying jellyfish contained in the foreign matter to the sea,
Dividing the water intake area into the curtain wall into a first area where the water intake of the water intake equipment is arranged and a second area where the water intake of the water intake equipment is not arranged, the first area and the first area Install a mesh member that restricts the movement of jellyfish between the two areas,
The wall surface is a height from the sea floor to the tide level at high tide,
The mesh member has a lower part located on the seabed and an upper part located above the upper end of the wall part,
The discharge channel discharges jellyfish into the second region,
The second region stores jellyfish discharged from the discharge channel, and the jellyfish in the second region is discharged out of the water intake region via the inflow / outflow portion by a low tide after high tide. A jellyfish release system.   The jellyfish discharge system according to claim 1, wherein a filter for separating jellyfish from foreign substances is provided in the discharge channel.   The jellyfish discharge system according to claim 1 or 2, wherein the mesh member comprises a lattice-like fence.   The jellyfish discharge system according to any one of claims 1 to 3, wherein an opening is formed in the upper portion of the wall portion surrounding the second region so that the jellyfish can move.

Images