JPS63252587A - High productivity sea area creating system - Google Patents

Abstract

PURPOSE:To perform the desalting of seawater by the temp. difference between a high productivity sea area and a solar energy high temp. basin or high temp. surface water, by creating the high productivity sea area by pumping low temp. submerged water. CONSTITUTION:The high temp. seawater supplied from a solar energy water pumping-up basin is evaporated in an evaporator 18. Low temp. submerged water 13 rich in nutritive substances is pumped up to a condenser 15 by a cold water pump 14 through a cold water pipe and the steam from a fluid recirculation passage 16 is cooled and condensed by the condenser 15 to obtain fresh water. An uranium and lithium recovery adsorbing tower 21 pref. uses an adsorbent having good absorbing quantity, selectivity and desorptivity and is pref. arranged to a confluent pipe of cold water and hot water. By this constitution, the total system can be established and economical efficiency is enhanced.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention utilizes the fact that schools of fish gather in low-temperature deep-sea water as a high-nutrient source and in sea areas with slightly different temperatures, to pump low-temperature deep-sea water. The present invention relates to a toll system that creates a highly productive sea area near the sea surface and desalinates seawater using the temperature difference between it and the high-temperature pond or high-temperature surface water.

[Conventional technology]

Since there is no prior art related to the above-mentioned total system, individual technologies constituting the total system will be briefly explained.

+11 Pumped storage power generation system Figure 3 connects an electric pump 01, a pumped storage pond 03, and a water turbine generator 04 through water conduits 02 and 05, and pumps water by operating the electric pump 01 during periods when electricity is not available. Water is pumped into the pond 05, and water is supplied to the water turbine generator during peak electricity demand periods.
4 shows the method for generating electricity. This is a method of storing high-quality electrical energy as potential energy and blowing it out when needed, but it requires energy equal to or greater than the energy generated by the water turbine generator 04 to pump water. It cannot be an energy gain.

(2) @Direct seawater desalination system As shown in Figure 4, a bleed pump 012, an evaporator 013, and a condenser 015 are installed in a low-pressure closed cycle circuit 011, and low-temperature deep water is passed through a conduit 016 and a cold water pump 018. The water vapor from the evaporator is cooled by being led to a condenser 015 to obtain distilled water.

High-temperature surface water is supplied to the evaporator 015 through a conduit 017 and a hot water pump 019, where it is heated and evaporated.

In this type of seawater desalination system, the internal power of the oil-air pump is large and requires advanced vacuum technology. The pressure at which seawater evaporates at a temperature of 25°C on the ocean requires an ultra-vacuum of LO5 atm, and it is important to keep the temperature of the high-temperature water as high as possible and keep the degree of vacuum low.

(3) Uranium and lithium recovery equipment A uranium and lithium recovery cylinder will be used to recover 9-ranium, etc. from seawater.

The amount of uranium in seawater is 3ppb (5μf/!), and even if 100% recovery were achieved, it would be necessary to circulate 500,000 tons of seawater to obtain 100% of the uranium. If we evaluate the economic efficiency by taking into account equipment costs and power costs for circulation pumps, we find that the current price of uranium is extremely low, so it does not meet the market base. (4) Ocean current lifting device Concrete blocks or cloth with floats on the seabed Updraft devices are sometimes installed, but they all utilize natural ocean currents and cannot provide large amounts of outward flow.

[Problem that the invention seeks to solve]

The conventional systems mentioned above, such as wave pumps, temperature difference seawater desalination systems, and marine aquaculture, each have a single piece of equipment installed for a single purpose, but they do not utilize natural energy in a single form. It is economically disadvantageous to do so, and it is hardly ever put into practical use, except for ocean farms and pumped storage power generation.

In the seawater desalination system described above, the temperature difference between high-temperature surface water and low-temperature deep water is small, and desalination efficiency is poor when used alone.

In addition, in uranium recovery systems, no matter how many good adsorbents are developed to recover uranium, the amount of uranium per 93
Since large amounts of seawater (more than 10,000 tons) will still be circulated, it is necessary to reduce costs from a total system perspective.

The present invention eliminates the above-mentioned drawbacks, heats high-temperature surface water in a solar pumping pond, increases the temperature difference with low-temperature deep water, and utilizes it. By organically combining systems, circulation aquaculture systems, etc., we aim to provide a high-productivity sea area creation system that makes advantageous use of power and thermal energy.

[Means for solving problems]

The present invention provides a seawater desalination apparatus having an evaporator, a bleed pump, a condenser, a circulating fluid path that communicates the above-mentioned components, and a cold water tank that supplies low-temperature deep-sea water to the condenser; It consists of an operating wave pump, a solar pumping pond having a translucent evaporation prevention film covering the upper part, and an insulating structure wall surrounding the periphery, and seawater supplied from the center pipe of the wave pump is pumped by the solar pump. supply the water pond,
The high temperature seawater from the solar pumping pond is supplied to the evaporator, and the evaporation chamber of the evaporator is evaporated by the bleed pump to evaporate the seawater, and the water vapor is transferred to the condenser to produce low temperature deep water. In addition to a seawater desalination system that cools and obtains fresh water, this high-productivity sea area creation system is characterized by creating a marine pasture at the seawater outlet of the condenser.

[For production]

A wave pump pumps seawater into a pumping pond, and the seawater is heated by sunlight. The high-temperature seawater from the pumping pond is supplied to the turbine pivot bleed pump, which bleeds the evaporator. On the other hand, distilled water is produced by sucking up low-temperature deep water and cooling the steam. Furthermore, wastewater from the seawater desalination system is used for artificial aquaculture, improving economic efficiency through total systemization. Wave number box, 2 is a wave gathering device installed on the seabed on the open ocean side of breakwater submersible 1, 3 is a wave pump placed inside breakwater submersible 1, and 4 is a wave collecting device installed on the ocean side of breakwater submersible 1. A wave pump 50 has a wave inlet port that opens, 5 is a float that has a check valve 6 at the lower end of the center hole and moves up and down above the wave inlet port 4, and 7 has a check valve 8i at the lower end and extends upward from the center hole of the float 5. It is a center tube that extends to . In addition, 10 is a solar pumped storage pond installed at a height of 10 to 20 m from the sea surface, and 11 is a solar pumped storage pond 10.
12 is a heat insulating structural wall forming the side walls and bottom surface of the solar pumping pond 10;
5 is low water @ deep water that is high in nutrients at a depth of 500 to 500 m, 14 is a cold water pump that pumps low temperature deep water 13,
15 is a condenser provided at the discharge port of the cold water pump 14; 16 is a fluid circulation path connecting the condenser 15 and the evaporator 18; a turbine-driven extraction pump 17 is interposed therebetween; The turbine-driven bleed pump 17 is driven by the energy of flowing high-temperature water from the solar pumping pond 10, and bleeds the evaporation chamber of the evaporator 18 to evaporate seawater. In addition,
FIG. 2 is a modification of FIG. 1 and differs from the device shown in FIG. 1 in that the bleed pump is driven by a motor.

Reference numeral 21 denotes a uranium recovery adsorption cylinder provided at the outlet of the condenser 15, and 22 represents a marine pasture formed at the seawater outlet of the uranium/lithium recovery adsorption cylinder 21.

Since the wave propagation speed is proportional to the depth, the wave collection device 2 is a device that collects waves using tapered topography, blocks, etc., and is installed at the inlet of the wave pump. The wave pump 3 is a pump that uses wave energy, and has a cylindrical shape with a concrete FJe submersible box 1 as an outer shell, and a center pipe 7 is arranged in the center, the upper end of which is guided to the surface of a pumping pond 100. . A check valve 8 is attached to the lower part of the primary center pipe 7. Concentric cylindrical float 5 around center pipe 7
70-45 moves up and down due to the waves.

A check 9f6 is attached to the lower end of the center hole of the float 5.

When the concentrated waves at the wave inlet 4 push up the float 5t,
The check valve 6 is closed, the check valve 8 is opened, and the seawater in the center inlet of the 70-tooth 5 is forced into the center pipe 7. When the waves at the wave inlet 4 recede, the float 5 lowers and the check valve 6 opens.
closes.

As the float 5 moves up and down, the seawater in the center pipe 7 rises in sequence and flows into the solar pumping pond 10 from the upper end of the center pipe 7.

The solar pumping pond 10 is installed at a height of 10 to 20 meters above the sea surface, and has a VFR structure around the pond. A transparent evaporation prevention plate or @11 is installed on the surface of the pond. The seawater is supplied from the wave pump 3 to the pumping pond 10, and is heated (e.g., 80°C) by the water pump.W! The seawater is supplied to the turbine bleed pump 17, which drives the bleed pump or supplies auxiliary power.

In the seawater desalination equipment, high-temperature seawater supplied from the solar pumping pond is evaporated in the evaporator 18 at the vapor pressure at that temperature.The higher the temperature, the higher the vapor pressure for evaporation. Internal power becomes smaller. In addition, the potential energy of the solar pumping pond is used to generate energy for the turbine that drives the extraction pump. On the other hand, low-temperature deep-sea water 13f to be folded into high-nutrient water is pumped up to a condenser 15 through a cold water pipe by a cold water pump 14, and water vapor from a fluid path 16 is cooled and liquefied by the condenser 15 to obtain fresh water.

The uranium/lithium recovery adsorption column 21 includes a linear type in which seawater is introduced into a multi-phase adsorbent cell using a special inorganic or organic adsorbent, and a circulating loop type. An adsorbent with good adsorption/desorption properties and a large amount of absorption is suitable for A1.

In addition, activated carbon or membrane flow separation stratification can also be used. From the viewpoint of water volume, it is preferable to install this uranium/lithium recovery equipment in a confluence pipe of cold water and hot water.
If there is a problem, install it inside the cold water pipe. Hot water pipes are relatively susceptible to microbial adhesion and corrosion, so from this point of view it is not preferable to attach them to hot water pipes.

In order to prevent deposits on hot water pipes, evaporators, etc. and to prevent acceleration of corrosion, it is preferable to periodically circulate cold water through the evaporator and hot water pipes.

In the embodiments shown in FIG. It is preferable to set

〔Effect of the invention〕

By employing the above structure g, the present invention has the following effects.

+11 Wave pumps can efficiently pump high-temperature surface water to the Taiyogen pumping pond due to the concentrated waves created by the wave aggregation device.〇(2) Taiyoft, the pumping pond receives the Tai@Yuan+W and is inside the pumping pond. The high temperature surface water of seawater can be further heated.

(3) Seawater desalination equipment can desalinate efficiently by cooling with low water @ deep water and heating with high temperature seawater in the pumping pond. Also, the on-site power can be reduced.

(4) The low-temperature deep water (high in nutrients) discharged from the seawater desalination device can form an artificial pasture with high-nutrient ocean currents in the sea surface waters.

(5) In addition, a large amount of wastewater from seawater desalination equipment
It can also be used for lithium recovery.

In this way, by creating a total system that mechanically combines seawater desalination, artificial pasture, and uranium and lithium recovery, economic efficiency has dramatically increased.

[Brief explanation of drawings]

Figures 1 and 2 are schematic explanatory diagrams of the high-productivity sea area creation system of the present invention, Figure 3 is a schematic diagram of a conventional pumped storage power generation system, and Figure 4
The figure is a schematic diagram of a conventional seawater desalination device.

Claims (1)

[Claims] A seawater desalination device that includes an evaporator, a bleed pump, a condenser, a circulating fluid path that communicates each of the components, and a cold water pump that supplies low-temperature deep water to the condenser, and a wave pump that operates with air pressure caused by wave power. It consists of a solar pumping pond having a transparent evaporation prevention film covering the upper part and a heat insulating structure wall surrounding the periphery, and seawater supplied from the center pipe of the wave pump is supplied to the solar pumping pond, and the solar pumping High-temperature seawater from a light pumping pond is supplied to the evaporator, and the evaporation chamber of the evaporator is evaporated by the bleed pump, and the water vapor is transferred to a condenser and cooled with low-temperature deep water. A high-productivity sea area creation system characterized in that, in addition to a seawater desalination system for obtaining fresh water, a marine pasture is created at the seawater outlet of the condenser.