JP5066545B2 - Submarine cold water pipe intake system of ocean thermal power plant - Google Patents

Description

  TECHNICAL FIELD The present invention relates to seawater temperature difference power generation, and more particularly to a submarine cold water pipe intake system for an ocean temperature difference power plant.

  The principle of ocean thermal energy conversion is to generate power using the temperature difference between the two due to the characteristic that the seawater temperature on the surface layer is high when solar thermal energy is absorbed, whereas the seawater temperature on the deep layer is low. To do. The power generation method can be further divided into two types: an open type and a closed type. The open system has not been put into practical use at present because the efficiency of the low-pressure turbine is too low. As shown in FIG. 20, the closed-type power generation principle is such that ammonia as a working catalyst is loaded into a closed pipeline, and high-temperature seawater evaporates liquid ammonia into ammonia vapor in an evaporation tank by heat exchange. Similarly, ammonia vapor condenses into liquid ammonia in the condensation tank by the heat exchange principle. At this time, there is an ammonia vapor flow that creates a pressure difference between the evaporation tank and the condensation tank, and this pressure difference is utilized. Then, the turbine operation of the generator can be promoted and power generation can be started.

However, since the temperature difference of seawater is only around 20 ° C, practical power generation cannot be achieved without a large amount of seawater. For this reason, intake pipes with large pipe diameters can be manufactured to produce low-temperature and high-temperature seawater. Must be drawn. However, when trying to manufacture a water intake pipe with a large diameter made of steel, it is not easy to manufacture and the manufacturing cost is considerably high. Especially, the intake pipe used for pumping deep seawater at the bottom of the sea is In addition to the need for large pipe diameters, it is not possible to take water deeply into the seabed unless it has a considerable length. Therefore, the problem to be solved by the present invention is how to manufacture a large tube diameter and extremely good structural strength in order to withstand the erosion of ocean currents.
The main object of the present invention is to provide a submarine cold water pipe intake system for an ocean thermal power plant that can transport a large amount of low-temperature seawater in the deep seabed and use it for commercial power plants.
Another object of the present invention is to provide a submarine cold water pipe intake system for an ocean temperature difference power plant that has a robust structural strength, can withstand the erosion of ocean currents, and does not easily break.

  In order to achieve the above object, a submarine cold water pipe intake system for an ocean thermal power plant according to the present invention is provided with a cold water inlet on a power ship, and one end of the cold water pipe is connected to the cold water inlet of the power ship. The other end reaches the seabed to draw low-temperature seawater, the cold water pipe has a plurality of filtration holes on the surface, a water intake head having a fixed portion at one end, and one end connected to the water intake head, Intake pipes connected in series by composite pipes, each composite pipe having a tubular form in which a plurality of waved inner pipes are arranged in order, and the inner and outer edges of the wall of the composite pipe are impermeable Covering the cloth, both ends of the composite pipe each have a connecting portion, and the connecting portion includes a water intake pipe for opening a plurality of connection holes corresponding to the corrugated inner pipe, an outer pipe, and an inner pipe. Connecting pipes that are joined together, the connecting pipes in front of their inner pipes It is joined to the launching port of the power generation ship, and a connection part is provided at the end of the outer pipe of the connection pipe so as to be joined to the connection part of the intake pipe, and one or more buoys are respectively attached to the outer pipe and the inner pipe. It consists of a connecting pipe to which is attached.

The submarine cold water pipe intake system of the ocean thermal power plant provided by the present invention has the following advantages.
(1) The intake pipe of the present invention is formed by connecting a plurality of composite pipes in series, and each of the composite pipes is formed by sequentially arranging elastic and foldable corrugated inner pipes. Therefore, compared with the intake pipe made entirely of steel, it is easier to manufacture and has lower manufacturing costs.

(2) The composite pipe of the present invention has a tube wall structure formed by arranging a large number of corrugated inner pipes, and a water flow is injected into the corrugated inner pipe of the composite pipe using a surge tank, and the composite pipe Since the wall of the composite pipe is expanded and the structural strength of the composite pipe is increased, and the pipe wall has a wave-like structure, the pressure generated from each direction can be more effectively countered.
(3) The composite pipe of the present invention is mainly composed of a large number of elastic corrugated inner pipes, and the inner / outer edges of the pipe wall of the composite pipe are composed of a high-strength impermeable cloth. Since it has some elasticity and foldable characteristics, it can be compressed during transportation to effectively reduce the material volume, and the intake pipe constructed by connecting the composite pipes in series is under the sea surface. Yes, the wall of the tube is somewhat elastic, so it can effectively prevent direct inundation of ocean currents.

  (4) In the present invention, the inner pipe is connected to the cold water entrance of the power generation ship, and the inner pipe moves in the outer pipe to expand and contract. Therefore, when the power generation ship is coupled to the inner pipe, The draft can be increased, and when the power generation vessel performs power generation work on the sea surface, it can be further stabilized, and a number of fixed wire ropes can be further connected to the intake pipe and the power generation vessel. Since several submersibles are added under the ship, the stability of the intake pipe below the sea surface and the power ship at the sea surface can be further effectively improved.

  (5) The connecting pipe of the present invention is formed by connecting an outer pipe and an inner pipe to each other, and a plurality of buoys are provided around the outer circumference of the outer pipe and the inner pipe. When the inner tube is floating on the sea surface, the inner tube is fitted into the outer tube, so that when the inner tube is swung up and down due to the influence of sea waves, the inner tube is moved to the outer tube. Since the pipe can be expanded and contracted along the pipe diameter, a situation in which the intake pipe joined to the outer pipe is pulled by the inner pipe and swings up and down does not occur.

It is a schematic diagram which shows the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a perspective view which shows the water intake head which concerns on the submarine cold water pipe water intake system of the ocean temperature difference power plant by one Embodiment of this invention. It is a perspective view which shows the intake pipe which concerns on the submarine cold water pipe intake system of the ocean thermal power plant by one Embodiment of this invention. It is a fragmentary sectional view showing the intake pipe concerning the submarine cold water pipe intake system of the ocean thermal energy difference power plant by one embodiment of the present invention. It is a fragmentary sectional view which shows the connection part of the composite pipe which concerns on the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a disassembled perspective view which shows the connecting pipe which concerns on the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the connection pipe part which concerns on the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a schematic diagram which shows the process at the time of installation of the submarine cold water pipe water intake system of the ocean thermal power plant by one Embodiment of this invention. It is a block diagram which shows the well-known seawater temperature difference power generation principle.

(One embodiment)
As shown in FIG. 1, in a submarine cold water intake system for an ocean thermal power plant according to an embodiment of the present invention, a cold water inlet 12 is provided in a power ship 10, and a pumping device (not shown) is provided in the cold water inlet 12. One end of the cold water pipe 21 is connected to the cold water inlet 12 of the power generation ship 10 and the other end reaches the bottom of the sea to draw low-temperature seawater. And a connecting pipe 51.
As shown in FIG. 2, the water intake head 31 is provided with a plurality of filtration holes 32 on the surface so that impurities in seawater are not sucked into the water intake head 31 during the water intake operation, and at the top end of the water intake head 31. The fixed part 34 is extended and formed outside.

As shown in FIG. 3, the intake pipe 41 is formed by connecting a plurality of composite pipes 42 in series, and each composite pipe 42 is arranged with a plurality of elastic foldable inner pipes 43 in order. A tubular structure is formed, and a high-strength impermeable cloth 44 is covered on the inner / outer edges of the wall of the composite tube 42, and both ends of the composite tube 42 are provided with steel annular connection portions 45, respectively. As a result, the roundness of the pipe opening of the composite pipe 42 can be maintained. Further, as shown in FIG. 3A, the cross section of the second connection portion 45 is substantially L-shaped, and a plurality of fixing holes 451 and a plurality of connection holes 452 extended outward are provided on the end surface of the second connection portion 45. . The composite tubes 42 are docked with each other through the fixing holes 451 of the second connection portions 45, and are respectively formed in the fixing holes 451 of the second connection portions 45 by several fixing members 46 so as to be integrated with the composite tubes 42. In the intake pipe 41 connected to each other and connected in series, the second connection portion 45 at one end thereof is connected to the fixing portion of the water head 31, and the end surface of the second connection portion 45 is connected to the end face of the second connection portion 45. The plurality of connecting holes 452 extended outward are connected in series with the corrugated inner pipes 43 in the composite pipe 42, and the corrugated inner pipes 43 in the composite pipe 42 are connected to the outside from the connecting holes 452. Can lead to. Further, as shown in FIG. 3B, several positioning holes 453 are provided around the wall edge of the second connection portion 45, and the composite pipes 42 are respectively provided with positioning members 47 and the impermeable cloth 44 of the composite pipe 42. The composite pipe 42 is fixed to each other in the positioning holes 453 on the wall edge of the connection portion 45, and the composite pipe 42 is fixed to the second connection portion 45. The wire rope 48 covered with the polyethylene resin is connected and brought into contact with the upper and lower ends of the composite pipe to secure the length of the composite pipe 42. In addition, when the composite pipe 42 is used, when a surge tank (not shown) is used to inject a water flow having an appropriate water pressure into the corrugated inner pipe 43 of the composite pipe 42, the wall of the composite pipe 42 is expanded. At the same time, by increasing the water pressure strength of the composite pipe 42 in the sea and changing the water level of the surge tank, the pressure of the corrugated inner pipe 43 in the composite pipe 42 can be adjusted to meet different environmental needs.

  As shown in FIG. 4, the connecting pipe 51 is formed by joining an outer pipe 52 and an inner pipe 53 to each other, and joining the inner pipe 53 to the cold water inlet 12 of the power generation ship 10. A first connecting portion 54 is provided at the end of the outer tube 52 and joined to the second connecting portion 45 of the water intake tube 41, and a plurality of buoys 521, 531 are respectively provided on the outer periphery of the outer tube 52 and the inner tube 53. Install it. The buoyancy provided by the first buoy 521 of the outer tube 52 is larger than the total weight of the water intake head 31, the water intake tube 41 and the outer tube 52 in water, and the buoyancy of the second buoy 531 of the inner tube 53 is adjusted to adjust the buoyancy. The tube 53 can move in the outer tube 52 by expanding and contracting. For this reason, when wind and waves at the sea are too large, water is added to the second buoy 531 of the inner pipe 53 to reduce the buoyancy of the inner pipe 53, and the inner pipe 53 is submerged below the sea level. The influence of wind and waves on the connection pipe 51 can be effectively reduced or avoided. Furthermore, when the inner pipe 53 and the cold water inlet 12 of the power generation ship 10 are coupled, the inner pipe 53 can move in the outer pipe 52 by extending and contracting. For this reason, the draft depth in the sea surface of the power generation ship 10 can be raised, and when the power generation ship 10 performs a power generation operation on the sea surface, it can be further stabilized.

  The following must be specifically explained here. As shown in FIG. 5, a plurality of fixed pulleys 55, 56 are provided on the outer periphery of the outer tube 52, one end of the fixed wire rope 61 is installed on the fixed pulleys 55, 56 of the outer tube 52, and the wire rope fixed clamp is further provided. 57, the fixed wire rope 61 installed on the fixed pulleys 55 and 56 is fixed, the other end of the fixed wire rope 61 is extended outward and submerged on the seabed, and the caisson 62 is attached to the fixed wire rope 61 and fixed. By pulling the wire rope 61 with the buoyancy of the caisson 62, a horizontal force can be generated. In addition, the stability of the cold water pipe 21 in the sea can be ensured, and a plurality of extension pipes 63 are provided around the outer circumference of the outer pipe 52, and each extension pipe 63 is a corrugated inner pipe in the intake pipe 41. 43, one end of the extension pipe 63 is connected to the corrugated inner pipe 43 in the water pipe 41, and the other end of the extension pipe 63 is extended upward to the inner pipe 53 and connected to the power generation ship 10. Since the extension pipe 63 is made of an elastic and contractible material, when the inner pipe 53 moves up and down in the outer pipe 52, each extension pipe 63 is interlocked along the inner pipe 53. be able to. With the same principle, as shown in FIG. 1, when a plurality of fixed wire ropes 61 and a caisson 62 structure are connected around the power generation ship 10 and a plurality of submersibles 14 are attached to the bottom of the power generation ship 10, The vertical gravity provided by 14 can further reduce the influence of waves on the sea surface from the power generation ship 10, and increase the stability of the power generation ship 10 at sea.

The steps for installing the submarine cold water pipe intake system of the ocean thermal power plant according to one embodiment of the present invention include the following steps a to k.
First, in step a, the barge 71 is operated to the installation point, and the barge 71 is provided with an installation area 72 that leads to the sea surface and a crane frame 74 that can move on the barge 71 (see FIG. 6).

Next, in step b, the water intake head 31 is transported to the vicinity of the barge 71 on the transport ship 81 (see FIG. 7), the water intake head 31 is transported above the installation area 72 by the clay frame 74 (see FIG. 8), and The water intake head 31 is lowered from the installation area 72 into the sea, and the fixed arm 76 sandwiches the fixed portion 34 of the water intake head 31 (see FIG. 9).
Next, in step c, the composite pipe 42 after being compressed by the supporting steel frame 82 is transported to the vicinity of the barge 71, and the composite pipe 42 is transported by the clay frame 74 onto the water intake head 31 in the installation area 72. The 2nd connection part 45 of the pipe 42 lower end is joined with the fixing | fixed part 34 of the water head 31 (refer FIG. 10).

  Next, in step d, the supporting steel frame 82 that has compressed the composite pipe 42 is removed, and the composite pipe 42 is lifted by the clay frame 74 to return to the original length of the composite pipe 42. At this time, a plurality of wire ropes 48 covered with polyethylene resin are attached to the outer periphery of the composite pipe 42 along the vertical direction (see FIG. 11). Subsequently, a water flow is injected into the corrugated inner pipe 43 of the composite pipe 42 with a surge tank (not shown) to strengthen the pipe wall strength of the composite pipe 42.

Next, in step e, the fixed arm 76 is loosened and the composite pipe 42 is submerged in the sea, the second connection portion 45 at the upper end of the composite pipe 42 is sandwiched by the fixed arm 76, and another composite pipe 42 is subsequently placed near the barge 71. (See FIG. 12).
Next, in step f, steps c to e are repeated until the composite pipe 42 connected in series has a predetermined length.

Next, in step g, the outer tube 52 is transported to the vicinity of the barge 71, the outer tube 52 is lifted onto the composite tube 42 by the clay frame 74 (see FIG. 13), and the first connection portion 54 of the outer tube 52 is moved. The second connecting portion 45 of the composite pipe 42 is docked with each other, the fixing arm 76 is loosened, the outer pipe 52 is lowered to seawater, and the upper end edge of the outer pipe 52 is sandwiched by the fixing arm 76 (see FIG. 14).
Next, in step h, the inner tube 53 is transported to the vicinity of the barge 71, the inner tube 53 is lifted over the outer tube 52 by the clay frame 74 (see FIG. 15), and the inner tube 53 is lowered to move the outer tube. The chilled water pipe 21 is configured by fitting in 52 (see FIG. 16).

  Next, in step i, a plurality of fixed wire ropes 61 are attached to the outer tube 52, one end of each fixed wire rope 61 is connected to the outer tube 52, the other end is submerged in the sea floor, and the fixed wire rope 61 is attached to the fixed wire rope 61. Each caisson 62 is attached, the fixed wire rope 61 is pulled moderately by the buoyancy of the caisson 62, and an appropriate amount of water is added into the second buoy 531 of the inner pipe 53, so that the inner pipe 53 is properly fitted under the sea surface. Sink into position (see FIG. 17).

Next, in step j, when the power generation ship 10 is operated up to the top of the cold water pipe 21 and the open ends of the cold water inlet 12 and the inner pipe 53 of the power generation ship 10 correspond to each other, the inside of the second buoy 531 of the inner pipe 53 An appropriate amount of water is extracted and the inner pipe 53 is slightly lifted, and a predetermined weight of seawater is sucked into the power generation ship 10 and loaded on the power generation ship 10 to be lowered. The cold water inlet 12 and the cold water pipe 21 The inner pipe 53 is joined (see FIG. 18).
Finally, in step k, a plurality of fixed wire ropes 61 and caissons 62 are connected around the power generation ship 10 and at the same time a plurality of submersibles 14 are attached to the bottom of the power generation ship 10 to stabilize the stability of the power generation ship 10 at sea. (See FIG. 19).

  10: Power generation ship, 12: Cold water entrance, 14: Submersible, 21: Cold water pipe, 31: Water intake head, 32: Filtration hole, 34: Fixed part, 41: Water intake pipe, 42: Composite pipe, 43: Wavy inner pipe 44: Impervious cloth, 45: Second connection portion, 451: Fixing hole, 452: Connection hole, 453: Positioning hole, 46: Fixing member, 47: Positioning member, 48: Wire rope, 51: Connection pipe, 52 : Outer tube, 53: Inner tube, 521: First buoy, 531: Second buoy, 54: First connection portion, 55, 56: Fixed pulley, 57: Wire rope fixed clamp, 61: Fixed wire rope, 62: Caisson, 63: Extension pipe, 71: Barge, 72: Installation area, 74: Crane frame, 76: Fixed arm, 81: Transport ship, 82: Support steel frame

Claims (11)

A cold water inlet is provided on the power ship, and a pumping device is provided at the cold water inlet, and the cold water pipe has one end connected to the cold water inlet of the power ship, and the other end reaching the sea floor to supply low-temperature seawater. A submarine cold water pipe water intake system for an ocean thermal power plant
The cold water pipe is
A water intake head having a plurality of filtration holes on the surface and having a fixed portion at one end;
One end is connected to the fixed portion of the water intake head, a plurality of composite pipes are connected in series, and each composite pipe has a tubular shape in which a plurality of waved inner pipes are arranged in order, and the composite pipe The inner and outer edges of the wall cover the impermeable cloth, and both ends of the composite pipe each have a first connecting portion, and the first connecting portion has a plurality of connecting holes corresponding to the corrugated inner tubes. Intake pipes to open,
An outer pipe and an inner pipe are joined to each other, the inner pipe is joined to a cold water inlet of the power generation ship, and a second connection portion is provided at the end of the outer pipe to provide the first of the intake pipe. A connecting pipe that is joined to one connecting portion and attaches one or more first buoys and second buoys to the outer pipe and the inner pipe,
A submarine cold water pipe intake system for an ocean thermal power plant. Wherein the end face of the second connecting portion have a plurality of fixing holes are arranged in a circumferential direction, mutually docked into the fixing hole of each of the respective composite pipe the first connecting portion, several fixing member 2. The submarine cold water pipe intake system for an ocean thermal power plant according to claim 1, wherein each of the first connection portions is formed in the fixing hole and is integrally connected to the composite pipe.   2. Each of the connection holes of the first connection portion is extended outward and connected in series with each of the corrugated inner pipes in the composite pipe. A submarine cold water pipe intake system for an offshore thermal power plant. Wherein the wall edge of the second connection portion possess several positioning holes are arranged in a circumferential direction, the composite tube the respective positioning of the wall edge of each of the composite tube positioning member said first connecting portion The submarine cold water pipe intake system for an ocean thermal power plant according to claim 1, wherein the submarine cold water pipe intake system is installed in a hole.   2. The ocean according to claim 1, wherein a plurality of wire ropes coated with polyethylene resin are connected between the first connection portions at both upper and lower ends of the composite pipe and abut against both ends of the composite pipe. Submarine cold water pipe intake system for temperature difference power plant.   When the composite pipe is used, a surge tank is used to inject a water flow of an appropriate water pressure into the corrugated inner pipe of the composite pipe to expand the wall of the composite pipe and at the same time increase the structural strength of the composite pipe. The submarine cold water pipe water intake system for an ocean thermal power plant according to claim 1.   The buoyancy provided by the first buoy of the outer pipe is greater than the total weight of the water intake head, the water intake pipe and the outer pipe in water, and the buoyancy of the second buoy of the inner pipe is adjusted. The submarine cold water intake system for an ocean thermal power plant according to claim 1, wherein the inner pipe is movable in a contracted manner within the outer pipe.   A plurality of fixed pulleys are provided around the outer periphery of the outer tube, one end of the fixed wire rope is installed on the fixed pulley of the outer tube, and the fixed wire rope installed on the fixed pulley with a wire rope fixing clip is provided. It is possible to fix the other end of the fixed wire rope to the sea bottom, attach a caisson to each of the fixed wire ropes, and pull the fixed wire rope with a pin by the buoyancy of the caisson to generate a horizontal force. The submarine cold water pipe water intake system for an ocean thermal power plant according to claim 1.   A plurality of fixed wire ropes and caisson are connected around the power generation ship, one end of the fixed wire rope is connected to the power generation ship, the other end is submerged in the sea floor, The submarine cold water pipe water intake system for an ocean thermal power plant according to claim 1, wherein a caisson is attached.   The submarine cold water intake of the ocean thermal power plant according to claim 9, wherein a plurality of submersibles are attached to the bottom of the power ship, and the submersibles are provided to provide vertical gravity. system.   A plurality of extension pipes are provided on the outer periphery of the outer pipe, and each of the extension pipes corresponds to the wavy inner pipe in the intake pipe, and the extension pipe has one end thereof connected to the wavy inner pipe in the intake pipe. The submarine cold water pipe intake system for an ocean thermal power plant according to claim 1, wherein the other end of the extension pipe is connected to the inside of the power ship by extending the other end of the extension pipe upward.

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