Water purification and heat collection heating system

The system addresses the challenge of hypoxic zones and energy inefficiency by using wave and tidal power to circulate oxygen-rich water and recover microplastics, while utilizing a heat pump to convert heat into energy, thereby improving water quality and energy utilization.

WO2025120877A1PCT designated stage expired Publication Date: 2025-06-12NAKAMURA IKUO
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Patent Information

Application Number
PCT/JP2024/010875
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-12-08
Filing Date
2024-03-20
Publication Date
2025-06-12

AI Technical Summary

Technical Problem

The stratification of water layers in lakes and oceans due to temperature differences leads to decreased oxygen levels in lower layers, forming hypoxic zones and accumulating microplastics, which threatens the ecosystem and fails to effectively utilize the accumulated heat as an energy source.

Method used

A system that utilizes wave and tidal power to circulate oxygen-rich water from the upper layer to the lower layer, while recovering microplastics, and employs a heat pump to collect and compress heat for energy utilization.

Benefits of technology

This system enhances oxygen levels in lower water layers, improves water quality by removing microplastics, and effectively converts accumulated heat into a usable energy source, addressing the issues of hypoxic zones and energy inefficiency.

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Abstract

When the water temperature at an upper layer part of lakes and marshes and / or gulfs and seas rises due to solar heat or the like, the density of water is low and it is difficult for the water to mix with high-density water at a lower layer part. This makes it difficult to supply, to the lower layer part, water that abundantly contains oxygen due to gas exchange between the atmosphere and the water surface, waves, and the like at the upper layer part. Thus, the amount of oxygen in water decreases, thereby resulting in formation of an oxygen-poor water mass and a low-oxygen sea area. Along with the problem of microplastics, this causes concern about ecosystem destruction due to deterioration of the environment in terms of water quality. Further, heat accumulated at the upper layer part can become a cause of disasters and is not effectively used as an energy source. When the water temperature at an upper layer part of lakes and marshes and / or gulfs and seas rises due to solar heat or the like, the density of water is low, but the water contains a large amount of dissolved oxygen. The present invention improves the environment in terms of water quality by: collecting heat and decreasing the temperature to increase the density; using wave power and tidal power to send, to a lower layer part, water that contains a large amount of dissolved oxygen; and increasing the amount of dissolved oxygen at the lower layer part, and in this process, collecting microplastics.
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Description

Water purification and heat collection system

[0001] Water Quality and Energy

[0002] When the water temperature in the upper layers of lakes and / or bays and oceans rises due to solar heat, the density of the water decreases, making it difficult for it to mix with the denser water in the lower layers. This makes it difficult for oxygen-rich water in the upper layers to be supplied to the lower layers through gas exchange between the atmosphere and the water surface, and waves, resulting in a decrease in the amount of oxygen in the water, leading to the formation of oxygen-depleted water masses and low-oxygen ocean areas. This, combined with the problem of microplastics, raises concerns about the destruction of ecosystems due to the deterioration of the aquatic environment. Furthermore, the heat accumulated in the upper layers can be a factor in disasters, and is not effectively used as an energy source.

[0003] Challenges include improving the aquatic environment due to the formation of hypoxic water masses and hypoxic sea areas in lakes and / or bays and oceans, and the problem of microplastics, as well as effectively utilizing the heat accumulated in the upper layers as energy.

[0004] When the water temperature in the upper layers of lakes and / or bays and oceans rises due to solar heat, the water density decreases, but it contains a large amount of dissolved oxygen. By collecting heat and lowering the temperature, the density increases, and using wave and tidal power, water with a high dissolved oxygen content is sent to the lower layers, increasing the amount of dissolved oxygen in the lower layers. In the process, microplastics are collected, and the collected heat is compressed and heated to be effectively used as an energy source.

[0005] Eliminating hypoxic water masses and low-oxygen sea areas in lakes and / or bays and oceans and recovering microplastics will improve the aquatic environment, and the collected heat can be compressed and heated, allowing it to be effectively used as an energy source.

[0006] FIG. 1 is an overall schematic diagram of a water purification and heat collection heating system. FIG. 2 is a cross-sectional view of the system main body and a circuit diagram of a heat pump unit. FIG. 3 is a four-sided view and installation diagram of a check valve. FIG. 4 is a front view and installation diagram of a heat pipe. FIG. 5 is a front view and installation diagram of a water supply pump. FIG. 6 is a side view of a microplastic recovery unit. FIG. 7 is a top view and a side view of a wave power / hydraulic pressure conversion unit. FIG. 8 is a cross-sectional view and an arrow cross-sectional view of an oscillating hydraulic piston pump. FIG. 9 is a circuit diagram of a hydraulic power generation unit.

[0007] The following describes in detail the embodiments of the present invention with reference to Figures 1 to 9. Note that the following embodiments are merely examples of the present invention and are not intended to limit the scope of the present invention, its applications, or its uses.

[0008] The water purification and heat collection heating system shown in Figures 1 and 2 consists of a system main body A, a unit and control section B, a water supply hose C, a microplastic recovery unit D, and a wave power / hydraulic conversion unit E. The system main body A has a first casing a1, a second casing a2, check valves a3 at several points on the periphery, several dozen heat pipes a4, and a water supply pump a5.

[0009] The water purification, heat collection, and heating system shown in Figures 1 and 2 has a unit and control section B on the top of the system main body A, the water supply hose C at the bottom, a microplastics collection unit D from the bottom to the side of the top, and wave power / hydraulic conversion units E at several points on the periphery. Water purification, heat collection, and heating systems are available in fixed and floating types, and the installation position of floating systems can be maintained by, for example, driving anchors into the seabed and mooring them with wire ropes.

[0010] The first casing a1 of the system main body A shown in Figure 2 is funnel-shaped, and its top is connected to and sealed with the second casing a2. Dozens of heat pipes a4 for collecting heat are vertically attached to the bottom a2a of the second casing, check valves a3 are provided at several points on the periphery, and a water pump a5 is installed in the center.

[0011] The second casing a2 of the system main body A shown in Figure 2 is formed in a double-cylinder shape, with the inside of the inner cylinder communicating with the first casing a1, a water pump a5 installed in the center, and the top surface of the second casing a2 sealed with a cap plate a2b.

[0012] A heat exchange chamber a2c is provided between the first baffle plate a2f and the second baffle plate a2i of the second casing a2, and a heat pipe a4 attached to the bottom a2a of the second casing communicates with the first ventilation hole a2h and the second ventilation hole a2k.

[0013] The upper layers of lakes and / or bays and oceans have a high dissolved oxygen content, and water with a high water temperature and low density flows into the first casing a1 due to wave and tidal forces, opening the upstream check valve a3. As the downstream check valve a3 does not open, the water flows toward the water supply hose C, where heat is collected by the heat pipe a4. The cooled water becomes denser and, supplemented by the water supply pump a5, is sent to the water supply hose C via the cyclone filter d1 and released into the lower layers where there is less dissolved oxygen, thereby improving oxygen-deficient water masses and low-oxygen sea areas.

[0014] The outlet of the expansion valve b1c of the heat pump unit b1 of the unit & control section B shown in Figure 2 is connected by a first pipe a2d to the second casing bottom a2a of the second casing a2 and a first chamber a2g separated by a first baffle plate a2f. A first vent hole a2h is provided in the first baffle plate a2f around the heat pipe a4 to allow the heat pipe a4 to pass through and gas to pass through.

[0015] A second pipe a2e connects the second chamber a2j, which is separated by the cap plate a2b and the second baffle plate a2i of the second casing a2, to the inlet of the compressor b1e of the heat pump unit b1 of the unit & control section B. A second vent hole a2k is provided in the second baffle plate a1i so that gas passes through the heat pipe a4 at the center. In other words, the heat pipe a4 does not pass through it.

[0016] The heat medium whose temperature has been reduced from the outlet of the expansion valve b1c of the heat pump unit b1 of the unit & control section B shown in Figure 2 flows through the first pipe a2d, fills the first chamber a2g, enters the heat exchange chamber a2c through the first ventilation hole a2h provided in the first baffle plate a2f, and flows around the outer periphery of the heat dissipation section of the heat pipe a4 toward the second ventilation hole a2k provided in the second baffle plate a2i, rises while efficiently collecting heat and increasing its temperature, and enters the second chamber a2j.

[0017] The heated heat medium flows through the second pipe a2e, is compressed and heated by the compressor b1a of the heat pump unit b1, and is supplied to the heat exchanger b1b. The supplied heat medium exchanges heat with a gas or liquid heat medium and is effectively used as an energy source. After heat exchange, the heat medium passes through the expansion valve b1c and becomes colder, and is sent to the first pipe a2d from the outlet.

[0018] The check valve a3 shown in Figures 2 and 3 opens the check valve a3 on the upstream side of the first casing a1 and allows water with a high dissolved oxygen content from the upper layers of lakes and / or bays / oceans to flow inside due to wave and tidal power. The check valve a3 has a valve body a3a with an opening, and a valve plate a3b large enough to close the opening is supported by a hinge a3c, and the valve plate a3b can be opened and closed freely. A screen a3d is installed on the outside of the check valve a3 and prevents debris larger than 5 mm in diameter from flowing into the first casing a1, and is equipped with hooks, for example, to catch bag-shaped debris.

[0019] 2 and 4, several dozen heat pipes a4 are installed inside the system main body A. They collect heat from the water flowing into the first casing a1 through the check valve a3 and efficiently transfer and radiate the heat to the heat exchange chamber a2c in the second casing a2. The heat pipe main body a4a has a heat collection section, a heat radiation section, and a wick. The fins a4b enlarge the heat radiation area of ​​the heat radiation section of the heat pipe main body a4a to improve the heat exchange efficiency with the heat medium. The bushes a4c are provided to enlarge the holes of the fins a4b, which have a large outer diameter, making them easier to attach and detach. The clamp joints a4d are provided to secure the heat pipes 6.

[0020] The water pump a5 shown in Figures 2 and 5 supplements the supply of water with a high dissolved oxygen content from the upper layers of lakes and / or bays / oceans to the lower layers. It is mounted in a cavity in the center of the system body A to facilitate easy installation and removal. The rotation of the motor a5a is transmitted via a shaft a5b to drive an impeller a5c for water supply. The impeller a5c is located at the outlet at the bottom end of the funnel-shaped first casing a1, allowing for efficient water supply.

[0021] The microplastic collection unit D shown in Figures 1 and 6 collects microplastics floating in the upper layers of lakes and / or bays and oceans. It is installed from the bottom to the upper side of the system main body A, and uses the centrifugal force of the water flow to collect microplastics at the bottom, and then a self-priming pump d2 sucks them up together with water to the upper side of the system main body A, where they are discharged into microplastic collection bags d3 and collected.

[0022] 2 and 7, the wave power / hydraulic pressure conversion unit E converts wave power into hydraulic pressure and is provided in several locations on the outer periphery of the system main body A. The blade main body a1 captures the up and down movement of the waves as a rotational and oscillating movement, and the shaft e1b, pinion shaft e2a, and coupling e1c connect to drive the oscillating hydraulic piston pump e2, converting wave power into hydraulic pressure. The oscillating hydraulic piston pump c2 can be returned to and maintained at the center of the oscillation angle, and by adjusting the angle of the coupling e1c, the blade main body e1 can be set to horizontal or any angle, making it possible to efficiently capture the up and down movement of the waves and convert wave power into hydraulic pressure.

[0023] The oscillating hydraulic piston pump e2 shown in FIG. 8 has a pinion shaft e2a, a first rack e2b, a second rack e2c, a piston e2d, and a spring e2e. Torque applied to the pinion shaft e2a causes the first rack e2b and the second rack e2c to operate in a linear direction, which is converted into hydraulic pressure by a pair of pistons e2d connected to the first rack e2b. A pair of springs e2e connected to the second rack e2c expands and contracts, and when no torque is applied to the pinion shaft e2a, the oscillating hydraulic piston pump e2 can be returned to and held at the center of the oscillation angle by the spring e2e.

[0024] The hydraulic power generation unit e3 shown in Figure 9 generates electricity using the hydraulic pressure of the wave power / hydraulic power conversion unit E, and drives an oscillating hydraulic piston pump using the oscillation of blade c1a caused by wave power. One of the pistons c2d draws hydraulic oil from the oil tank 16b via check valve c3b, while the other piston c2d generates hydraulic oil, which is stored in accumulator c3c via check valve c3b. The hydraulic motor c3d drives generator c3e to generate electricity. The generated electricity is used to drive water pump a5, compressor b1a, and self-priming pump d2, charge battery b3, and provide power for the control and communications of the water purification and heat collection / heating system.

[0025] The control panel b2 shown in FIG. 1 controls various devices and sensors.

[0026] A System main body B Unit and control section C Water supply hose D Microplastics collection unit E Wave power to hydraulic conversion unit a1 First casing a2 Second casing a2a Second casing bottom a2b Cap plate a2c Heat exchange chamber a2d First pipe a2e Second pipe a2f First baffle plate a2g First chamber a2h First vent hole a2i Second baffle plate a2j Second chamber a2k Second vent hole a3 Check valve a3a Valve body a3b Valve plate a3c Hinge a3d Screen a4 Heat pipe a4a Heat pipe body a4b Fin a4c Bush a4d Clamp joint a5 Water supply pump a5a Motor a5b Shaft a5c Impeller b1 Heat pump unit b1a Compressor b1b Heat exchanger b1c Expansion valve b2 Control panel b3 Battery d1 Microplastic collection unit d1a Cyclone filter d2 Self-priming pump d3 Microplastic collection bag e1 Blade body e1a Blade e1b Shaft e1c Coupling e2 Oscillating hydraulic piston pump e2a Pinion shaft e2b First rack e2c Second rack e2d Piston e2e Spring e3 Hydraulic power generation unit e3a Oil tank e3b Check valve e3c Accumulator e3d Hydraulic motor e3e Generator

Claims

1. A water purification / heat collection / heating system, comprising a system body A, a unit & control unit B, a water supply hose C, a microplastics recovery unit D, and a wave power / hydraulic conversion unit E, the unit & control unit B being arranged on the top surface of the system body A, the water supply hose C at the bottom, the microplastics recovery unit D from the bottom to the top side, and the wave power / hydraulic conversion unit E at several points on the periphery, the water purification / heat collection / heating system being either fixed or floating, the floating type being capable of maintaining its installation position, for example, by driving an anchor into the seabed and mooring it with a wire rope, the system body A comprising a first casing a1, a second casing a2, check valves a3 at several points on the periphery, several tens of heat pipes a4, and a water supply pump a5, the unit & control unit B comprising a heat pump unit b1, a control panel b2, a battery b3, and a hydraulic power generation unit e3, The heat pump unit b1 has a compressor b1a, a heat exchanger b1b, and an expansion valve b1c, the microplastic recovery unit D has a cyclone filter d1, a self-priming pump d2, and a microplastic recovery bag d3, the wave power / hydraulic conversion unit E has a blade body e1 and an oscillating hydraulic piston pump e2, the hydraulic power generation unit e3 has an oil tank e3a, a check valve e3b, an accumulator e3c, a hydraulic motor e3d, and a generator e3e, The system main body A collects heat from the upper layers of lakes and / or bays and oceans, which have a large amount of dissolved oxygen and high water temperature, and releases it to the lower layers where the amount of dissolved oxygen is low, thereby improving oxygen-depleted water masses and low-oxygen sea areas. Water opens the upstream check valve a3 due to wave power and tidal power and flows into the inside of the first casing a1, and since the downstream check valve a3 does not open, the water flows toward the water supply hose C, where heat is collected by the heat pipe a4, and the water, which has been cooled, becomes denser. With the supplement of the water supply pump a5, the water is sent to the water supply hose C through the cyclone filter d1 and released into the lower layers where the amount of dissolved oxygen is low, thereby improving oxygen-depleted water masses and low-oxygen sea areas. The heat collected by the heat pipe a4 is heat exchanged with a heat medium in the heat exchange chamber a2c of the second casing a2, and is further compressed and heated by the compressor b1a of the heat pump unit b1, and is effectively utilized as an energy source after heat exchange with the heat medium in the heat exchanger b1b.The microplastic recovery unit D recovers microplastics floating in the upper layer, and collects microplastics at the bottom by centrifugal force using the water flow through a cyclone filter d1, and then sucks them up together with water to the upper side of the system body A using a self-priming pump d2, and discharges them into a microplastic recovery bag d3 for recovery. The wave power / hydraulic conversion unit E captures the up and down movement of the waves with the wing body e1, drives the oscillating hydraulic piston pump e2 to convert it into hydraulic pressure, supplies the hydraulic pressure to the hydraulic power generation unit e3, and generates electricity by driving the generator e3e using the hydraulic motor e3d. The generated electricity is used to drive the water pump a5, the compressor b1a, and the self-priming pump d2, charge the battery b3, and is used as electricity for the control and communication of the water purification / heat collection and heating system. A water purification and heat collection / heating system that utilizes wave and tidal power to improve oxygen-poor water masses and low-oxygen ocean areas in the lower layers of lakes and / or bays and oceans, and collects floating microplastics in the upper layers. It also effectively uses high-temperature water as an energy source by collecting heat and compressing it to heat it, efficiently utilizing a synergistic effect.

2. The oscillating hydraulic piston pump e2 has a pinion shaft e2a, a first rack e2b, a second rack e2c, a piston e2d, and a spring e2e, and when torque is applied to the pinion shaft e2a, the first rack e2b and the second rack e2c operate in a linear direction and are converted into hydraulic pressure by the pair of pistons e2d connected to the first rack e2b, and the pair of springs e2e connected to the second rack e2c expand and contract, and when no torque is applied to the pinion shaft e2a, the oscillating hydraulic piston pump c2 can be returned to the center of the oscillation angle and held there by the spring e2e, and the water purification and heat collection / heating system according to claim 1 can be set to a horizontal or any angle by adjusting the angle of the coupling e1c that connects the pinion shaft e2a and the axis e1b of the wing main body e1, and the up and down movement of waves is efficiently captured and converted into hydraulic pressure, and the generator e3e is driven by the hydraulic motor e3d to generate electricity and provide self-sufficiency in electricity.

Citation Information

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