A seawater spray desalination device and method driven by light energy and tidal energy

Abstract

This invention discloses a seawater desalination device and method driven by a combination of solar and tidal energy, comprising a steam generator, a seawater pump, a water solenoid valve, a seawater pool, a freshwater collection tank, an air heater, a liquefaction chamber, and a tidal power generation system. A concentrator can heat the air heating chamber, and high-speed air is heated by the air heater before entering the steam generator. Seawater is pumped into a vortex mist generator, which atomizes the seawater into droplets. High-speed, high-temperature air collides and merges with the droplets to generate water vapor, which is then propelled into the liquefaction chamber. The water vapor liquefies into freshwater in the liquefaction chamber and flows into a distribution tank for composition analysis. Concentrated seawater is collected in a concentrated seawater collection tank and then transported to salt fields for salt production. This invention fully utilizes renewable energy for seawater desalination and salt production, achieving high efficiency and energy saving, high economic output, and providing strong evidence for seawater utilization.

Description

Technical Field

[0001] This invention mainly relates to the field of water resource utilization, and more specifically, to a seawater spray desalination device and method driven by a combination of solar and tidal energy. Background Technology

[0002] Seawater desalination is the process of producing fresh water by desalinating seawater. Currently, the main technologies for seawater desalination include distillation, freezing, reverse osmosis, ion migration, and chemical methods, each with its own limitations. Traditional distillation, in particular, consumes large amounts of fossil fuels, resulting in high energy consumption, low freshwater conversion rates, and environmental damage, thus limiting its widespread application.

[0003] Tidal energy, as a renewable energy source, can be used to generate electricity. Its power generation principle involves storing seawater in a reservoir during high tide and releasing it at low tide. The difference in water level causes the seawater to drive turbine blades, ultimately powering a generator. Therefore, tidal energy is a promising renewable energy source for seawater desalination. Summary of the Invention

[0004] In view of the problems of high energy consumption and low freshwater conversion rate in traditional distillation methods, the purpose of this application is to provide a low-energy-consumption, high-seawater-conversion-rate, economical and environmentally friendly seawater desalination device that utilizes renewable energy.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution: a seawater spray desalination device driven by a combination of solar and tidal energy, including a tidal power generation module for power supply, a seawater pool for supplying seawater, an airflow supply module for heating and accelerating air, a steam generation tank for separating water vapor from seawater, a concentrated seawater collection tank for collecting concentrated seawater, a liquefaction chamber for liquefying water vapor, a diversion tank for diverting liquefied water, and a freshwater storage tank for storing freshwater.

[0006] The tidal power generation module generates electricity during high and low tides to power the seawater spray desalination device. The steam generating tank includes a high-temperature shell and a swirling mist generator and a circulating mist generator installed on top of the high-temperature shell. The swirling mist generator is connected to the seawater pool through a pipe and atomizes the seawater supplied by the seawater pool into droplets. The circulating mist generator is used to atomize liquefied water that does not meet the water quality target into droplets. A concentrated seawater outlet is provided at the bottom of the high-temperature shell. The concentrated seawater outlet is connected to a concentrated seawater collection tank. One side of the high-temperature shell is connected to an air supply module. The air supply module can use solar energy to heat the air and input the air into the steam generating tank. The air in the steam generating tank exchanges heat with the droplets after seawater atomization to generate water vapor. The other side of the high-temperature shell is connected to a liquefaction chamber. The liquefaction chamber liquefies the water vapor input from the steam generating tank and introduces it into a distribution tank connected to the liquefaction chamber.

[0007] The diversion tank is equipped with a freshwater quality monitoring system for analyzing the quality of liquefied water. When the analysis results do not meet the water quality target, the diversion tank will transport the liquefied water to the circulating mist generator. When the analysis results meet the water quality target, the diversion tank will transport the liquefied water to the freshwater storage tank for storage through a freshwater solenoid valve installed between the diversion tank and the freshwater storage tank.

[0008] As a preferred embodiment of the present invention, the airflow supply module includes a booster pump for providing airflow, an air heater for heating the airflow, a condenser lens disposed above the air heater, and a pneumatic solenoid valve disposed between the booster pump and the air heater for controlling the airflow; the air heater is filled with a high-efficiency heat-absorbing medium, and in sunny weather, the condenser lens concentrates sunlight to heat the air heater; in cloudy or rainy weather, the heating energy of the air heater is provided by a tidal power generation module.

[0009] As a preferred embodiment of the present invention, the tidal power generation module includes a tidal power generation system, a heating end battery, and a liquefaction end battery; the tidal power generation system generates tidal power and stores the generated electrical energy in the heating end battery and the liquefaction end battery; the heating end battery supplies power to the airflow supply module and the swirl mist generator, and the liquefaction end battery supplies power to the liquefaction chamber, the diversion tank, and the circulating mist generator.

[0010] As a preferred embodiment of the present invention, the liquefaction chamber is equipped with a condensing medium capable of condensing water vapor into liquefied water. The seawater collected in the concentrated seawater collection tank is then transported to salt fields for salt production.

[0011] As a preferred embodiment of the present invention, the seawater spray desalination device further includes an inlet controller and an outlet controller. The inlet controller is connected to the air supply module and the liquefaction chamber, and is used to control the flow rate of air entering the steam generating tank and the flow rate of water vapor entering the liquefaction chamber. The outlet controller is connected to the concentrated seawater collection tank, the diversion tank, and the freshwater solenoid valve, and is used to control the flow rate of concentrated seawater flowing into the concentrated seawater collection tank and to control the diversion of the diversion tank. As a further preferred embodiment of the present invention, a secondary seawater pool is provided between the diversion tank and the circulating mist generator. The secondary seawater pool is used to store liquefied water that does not meet the water quality target. A secondary seawater pump for pumping water is provided between the diversion tank and the secondary seawater pool. A booster pump and a secondary solenoid valve are provided between the secondary seawater pool and the circulating mist generator. The secondary solenoid valve is connected to the inlet controller, and the inlet controller controls the flow rate of liquefied water that does not meet the water quality target flowing into the circulating mist generator through the secondary solenoid valve. Furthermore, a seawater pump and a water solenoid valve are installed between the seawater pool and the cyclone mist generator. The water solenoid valve is connected to the inlet controller, which controls the flow rate of seawater into the cyclone mist generator through the water solenoid valve.

[0012] The present invention also provides a seawater spray desalination method using a solar-tidal energy combined-driven seawater spray desalination device, comprising the following steps:

[0013] Step 1: Seawater in the seawater tank is fed into the vortex mist generator, which then atomizes the seawater into mist droplets;

[0014] Step 2: Air is accelerated and heated through the airflow supply module, and finally enters the steam generation tank through the gas pipeline to exchange heat with the mist droplets, thereby generating water vapor;

[0015] Step 3: After heat exchange, the seawater concentration will increase and become concentrated seawater. The concentrated seawater enters the concentrated seawater collection tank through the pipe at the bottom of the steam generator. The generated water vapor enters the liquefaction chamber by air and is liquefied into liquefied water.

[0016] Step 4: The liquefied water in the liquefaction chamber enters the distribution tank. At this time, the liquefied water will be analyzed for water quality. If the analysis results do not meet the water quality target, the initial liquefied water will enter the circulating mist generator to regenerate seawater droplets.

[0017] Step 5: The liquefied freshwater flows through a freshwater solenoid valve into the freshwater storage tank below; the storage tank is equipped with a freshwater quality monitoring system, which adjusts the air and seawater flow rates according to the monitored conditions.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. This invention is an automatically adjustable type that regulates seawater flow by monitoring the quality of desalinated water.

[0020] 2. The concentrator of the present invention can independently heat the high-efficiency heat-absorbing medium when there is sufficient light, and can be powered by the tidal power generation module in cloudy or rainy weather, without the need for additional energy, which is economical and environmentally friendly.

[0021] 3. The vortex mist generator of the present invention can accurately control the particle size of the generated mist droplets while increasing the mist droplet generation rate, effectively increasing the freshwater conversion rate.

[0022] 4. The tidal power generation system of this invention can generate electricity during high and low tides, storing a portion of the generated energy in a battery and using the remaining portion to generate alternating current (AC) to power the liquefaction chamber via a DC-AC inverter on the liquefaction side. When sunlight is insufficient, the energy in the battery can also power the heating chamber via a DC-AC inverter on the heating side, significantly reducing energy costs.

[0023] 5. The inlet controller and outlet controller of the present invention can communicate wirelessly, enabling in-depth control of the entire seawater desalination system and achieving intelligent adjustment.

[0024] 6. The solenoid valve used in this invention can precisely control the flow of water, thereby improving the efficiency of freshwater production.

[0025] 7. This invention makes full use of resources. It can not only produce fresh water that meets water quality requirements, but also the concentrated salt seawater products obtained can be transported to salt fields for salt production, which greatly improves the salt production speed and reduces the salt production process. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of the overall structure of a seawater spray desalination device and method driven by a combination of light and tidal energy according to the present invention.

[0028] In the diagram: 1-Boosting air pump, 2-Air pressure solenoid valve, 3-High-efficiency heat absorption medium, 4-Air heater, 5-Concentrating lens, 6-Seawater pool, 7-Seawater pump, 8-Water solenoid valve, 9-Inlet controller, 10-Secondary solenoid valve, 11-Boosting pump, 12-Secondary seawater pump, 13-Swirl mist generator, 14-Insulation coating, 15-Circulating mist generator, 16-Secondary seawater pool, 17-Steam generator, 18-Concentrated seawater collection tank, 19-Outlet controller, 20-Condensing medium, 21-Liquefaction chamber, 22-Diverter tank, 23-Freshwater solenoid valve, 24-Salt drying field, 25-Heating end DC-AC inverter, 26-Heating end battery, 27-Tidal power generation system, 28-Liquefaction end battery, 29-Liquefaction end DC-AC inverter, 30-Freshwater storage tank. Detailed Implementation

[0029] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0030] like Figure 1 As shown, a seawater spray desalination device driven by a combination of solar and tidal energy mainly includes a tidal power generation module for power supply, a seawater pool 6 for supplying seawater, an airflow supply module for heating and accelerating air, a steam generation tank 17 for separating water vapor from seawater, a concentrated seawater collection tank 18 for collecting concentrated seawater, a liquefaction chamber 21 for liquefying water vapor, a diversion tank for diverting liquefied water, and a freshwater storage tank 30 for storing freshwater; through the cooperation of various components, seawater is converted into freshwater with high efficiency and low energy consumption.

[0031] In one embodiment of the present invention, the tidal power generation module includes a tidal power generation system 27, a heating end battery 26, and a liquefaction end battery 28; the tidal power generation system 27 generates tidal power and stores the generated electrical energy in the heating end battery 26 and the liquefaction end battery 28; the heating end battery 26 supplies power to the airflow supply module and the swirl mist generator 13, and the liquefaction end battery 28 supplies power to the liquefaction chamber 21, the diversion tank 22, and the circulating mist generator 15; a heating end DC-AC inverter 25 is provided between the heating end battery 26 and the air heater 4; a liquefaction end DC-AC inverter 29 is provided between the liquefaction end battery 28 and the liquefaction chamber 21.

[0032] In one embodiment of the present invention, the airflow supply module includes a booster pump 1 for providing airflow, an air heater 4 for heating the airflow, a concentrating mirror 5 disposed above the air heater 4, and a pneumatic solenoid valve disposed between the booster pump 1 and the air heater 4 for controlling the airflow. The air heater 4 is filled with a high-efficiency heat-absorbing medium 3. In sunny weather, the concentrating mirror 5 concentrates sunlight to heat the air heater 4; in cloudy or rainy weather, the heating energy for the air heater 4 is provided by a tidal power generation module. In this embodiment, the temperature in the air heater 4 can reach a maximum of 210°C.

[0033] In one embodiment of the present invention, the steam generating tank 17 includes a high-temperature shell, a swirling mist generator 13, and a circulating mist generator 15. The left end of the steam generating tank 17 is connected to the air heater 4, the right end is connected to the liquefaction chamber 21, and the bottom is connected to the concentrated seawater collection tank 18. The interior of the steam generating tank 17 is made of a high-strength metal shell and is fully sealed. In this embodiment, the steam generating tank 17 is wrapped with heat-insulating material, which can keep the internal temperature of the tank at a high level and enhance the steam generation efficiency. The formula for calculating the critical droplet radius under the supersaturated state of the mist droplets in the steam generating tank 17 is:

[0034]

[0035] r c Critical droplet radius (m) 2 ); Surface tension of the droplet (N / m); Droplet density (kg / m³) 3 ); Water vapor pressure (MPa); : Saturation pressure (MPa); u v Specific volume of water vapor (m³) 3 / kg); S: supersaturation.

[0036] In a preferred embodiment of the present invention, seawater is stored in the seawater pool 6, and the seawater is pumped into the cyclone mist generator 13 by the seawater pump 7 and the water solenoid valve 8. The inlet water pressure of the cyclone mist generator 13 is 0.1 MPa-0.3 MPa, and the droplet size it produces is 500 μm-1500 μm.

[0037] In one embodiment of the present invention, the diversion tank 22 is connected to the liquefaction chamber 21 and the freshwater storage tank 30. A freshwater solenoid valve 23 is provided between the diversion tank 22 and the freshwater storage tank 30. The diversion tank 22 is equipped with a pipeline and is connected to the secondary seawater pool 16 through a secondary seawater pump 12. As a preferred embodiment, the diversion tank 22 is equipped with a freshwater quality monitoring system for analyzing the quality of the liquefied water. When the analysis result does not meet the water quality target, the diversion tank 22 transports the liquefied water to the circulating mist generator 15. When the analysis result meets the water quality target, the diversion tank 22 transports the liquefied water to the freshwater storage tank 30 for storage through the freshwater solenoid valve 23 located between the diversion tank 22 and the freshwater storage tank 30.

[0038] As a preferred embodiment of the present invention, the solar-tidal energy hybrid-driven seawater spray desalination device uses an inlet controller 9 and an outlet controller 19 to perform in-depth control of the entire seawater desalination system, achieving intelligent adjustment. The inlet controller 9 is connected to the pneumatic solenoid valve 2, the water solenoid valve 8, the secondary solenoid valve 10, the air heater 4, and the liquefaction chamber 21 via connecting lines; the outlet controller 19 is connected to the concentrated seawater collection tank 18, the diversion tank 22, and the freshwater solenoid valve 23 via connecting lines; the inlet controller 9 and the outlet controller 19 can communicate wirelessly.

[0039] To more clearly illustrate the working process of the above-mentioned device, a seawater desalination method using a solar-tidal energy composite driven seawater desalination device is also provided, specifically including the following steps:

[0040] Step 1: In sunny weather, the condenser lens 5 heats the high-efficiency heat-absorbing medium 3 in the air heater 4. In cloudy or rainy weather, the heating energy is provided by the electrical energy stored in the tidal power plant. Then the air is accelerated by the booster pump 1. The air pressure solenoid valve 2 can regulate the gas flow rate. The high-speed air then passes through the heating chamber, carrying away the heat absorbed by the high-efficiency heat-absorbing medium 3, and finally high-speed high-temperature air is obtained.

[0041] Step 2: A swirl mist generator 13 and a circulating mist generator 15 are installed in the steam generating tank 17. Seawater in the seawater tank is input into the swirl mist generator 13 through the seawater pump 7. The seawater flow rate can be reasonably adjusted by the water solenoid valve 8. After the seawater enters the swirl mist generator 13, it will eventually produce droplets with a diameter of 500μm-1500μm through the action of the internal structure.

[0042] Step 3: High-speed, high-temperature air enters the steam generating tank 17 through the gas pipe and exchanges heat with the generated mist droplets. Water molecules evaporate when heated, while salt and impurities do not. Thus, water molecules separate from the salt and impurities in the seawater, and water vapor is generated.

[0043] Step 4: The concentration of seawater will increase after heat exchange, becoming concentrated seawater. The lower part of the steam generating tank 17 is connected to the concentrated seawater collection tank 18 through a pipe. After being collected, the concentrated seawater will be transported to the salt field 24, thereby increasing the salt production speed and making full use of resources.

[0044] Step 5: The generated water vapor is driven into the liquefaction chamber 21 by high-speed air. The electrical energy required by the liquefaction chamber 21 is provided by the electrical energy stored in the battery of the tidal power generation system and converted into AC power by the DC-AC inverter 29 at the liquefaction end. The liquefaction chamber 21 is equipped with a condensing medium 20, and the water vapor is liquefied in the cooler.

[0045] Step 6: The water vapor after initial liquefaction enters the distribution tank 22 through the pipeline. At this time, the liquefied water will be analyzed for water quality. If the analysis results do not meet the water quality target, the initial liquefied water will be transported to the secondary seawater pool 16 by the action of the secondary seawater pump 12. Then, it will enter the circulating mist generator 15 through the pressurization pump 11 and the secondary solenoid valve 10 to regenerate seawater mist droplets with a diameter of 500μm-1500μm.

[0046] Step 7: The liquefied freshwater flows through the freshwater solenoid valve 23 into the freshwater storage tank 30 below. The storage tank is equipped with a freshwater quality monitoring system, which can adjust the air and seawater flow rates according to the monitored conditions, thereby achieving the goal of efficient freshwater production.

[0047] Step 8: The inlet controller 9 controls the pneumatic solenoid valve 2, the water solenoid valve 8, the secondary solenoid valve 10, the air heater 4, and the liquefaction chamber 21, thereby regulating the inlet flow rate; the outlet controller 19 controls the concentrated seawater collection tank 18, the diversion tank 22, and the freshwater solenoid valve 23; the inlet controller 9 and the outlet controller 19 can communicate wirelessly, thereby achieving the closed-loop control target of the seawater desalination system and realizing intelligent regulation.

[0048] In summary, the solar-tidal energy combined-driven seawater spray desalination device of the present invention reduces energy consumption by utilizing solar and tidal energy; and the obtained concentrated salt seawater product can be transported to salt fields for salt production, greatly improving the salt production speed, reducing salt production steps, and making full use of resources. Seawater is atomized into droplets and heat-exchanged in a steam generator 17 to generate water vapor, which is then liquefied in a liquefaction chamber 21 and the liquefied water is detected and diverted through a distribution tank, effectively increasing the freshwater conversion rate.

[0049] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A seawater spray desalination method driven by a combination of solar and tidal energy, characterized in that, The seawater spray desalination method employs a seawater spray desalination device driven by a combination of solar and tidal energy. The seawater spray desalination device includes a tidal power generation module for power supply, a seawater pool (6) for supplying seawater, an airflow supply module for heating and accelerating air, a steam generation tank (17) for separating water vapor from seawater, a concentrated seawater collection tank (18) for collecting concentrated seawater, a liquefaction chamber (21) for liquefying water vapor, a diversion tank for diverting liquefied water, and a freshwater storage tank (30) for storing freshwater. The tidal power generation module generates electricity during high and low tides to power the seawater spray desalination device; the steam generating tank (17) includes a high-temperature shell and a swirling mist generator (13) and a circulating mist generator (15) installed on the top of the high-temperature shell; the swirling mist generator (13) is connected to the seawater pool (6) through a pipe and atomizes the seawater supplied by the seawater pool (6) into mist droplets; the circulating mist generator (15) is used to atomize liquefied water that does not meet the water quality target into mist droplets; a concentrated seawater outlet is provided at the bottom of the high-temperature shell; The concentrated seawater outlet is connected to the concentrated seawater collection tank; one side of the high-temperature shell is connected to the air supply module; the air supply module can use solar energy to heat the air and input the air into the steam generating tank (17), where the air in the steam generating tank (17) exchanges heat with the droplets after seawater atomization to generate water vapor; the other side of the high-temperature shell is connected to the liquefaction chamber (21); the liquefaction chamber (21) liquefies the water vapor input from the steam generating tank (17) and introduces it into the diversion tank (22) connected to the liquefaction chamber (21); The diversion tank (22) is equipped with a freshwater quality monitoring system for analyzing the quality of liquefied water. When the analysis results do not meet the water quality target, the diversion tank (22) will transport the liquefied water to the circulating mist generator (15). When the analysis results meet the water quality target, the diversion tank (22) will transport the liquefied water to the freshwater storage tank (30) for storage through the freshwater solenoid valve (23) set between the diversion tank (22) and the freshwater storage tank (30). A seawater pump (7) and a water solenoid valve (8) are installed between the seawater pool (6) and the cyclone mist generator (13). The water solenoid valve (8) is connected to the inlet controller (9), and the inlet controller (9) controls the flow rate of seawater flowing into the cyclone mist generator (13) through the water solenoid valve (8). The inlet pressure of the cyclone mist generator (13) is 0.1Mpa-0.3Mpa, and the droplet size it produces is 500μm-1500μm.

2. The seawater spray desalination method driven by a combination of solar and tidal energy as described in claim 1, characterized in that, The air supply module includes a booster pump (1) for providing airflow, an air heater (4) for heating the airflow, a condenser lens (5) disposed above the air heater (4), and a pneumatic solenoid valve disposed between the booster pump (1) and the air heater (4) for controlling the airflow. The air heater (4) is filled with a high-efficiency heat-absorbing medium (3). In sunny weather, the condenser lens (5) concentrates sunlight to heat the air heater (4). In cloudy or rainy weather, the heating energy of the air heater (4) is provided by the tidal power generation module.

3. The seawater spray desalination method driven by a combination of solar and tidal energy as described in claim 1, characterized in that, The tidal power generation module includes a tidal power generation system (27), a heating end battery (26), and a liquefaction end battery (28). The tidal power generation system (27) generates electricity through tidal power and stores the generated electrical energy in the heating end battery (26) and the liquefaction end battery (28). The heating end battery (26) supplies power to the airflow supply module and the swirl mist generator (13), and the liquefaction end battery (28) supplies power to the liquefaction chamber (21), the diversion tank (22), and the circulating mist generator (15).

4. The seawater spray desalination method driven by a combination of solar and tidal energy according to claim 1, characterized in that, The liquefaction chamber (21) is equipped with a condensing medium (20) that can condense water vapor into liquefied water.

5. The seawater spray desalination method driven by a combination of solar and tidal energy according to claim 1, characterized in that, The seawater collected by the concentrated seawater collection tank (18) is then transported to salt fields for salt production.

6. The seawater spray desalination method driven by a combination of solar and tidal energy according to claim 1, characterized in that, The seawater spray desalination device also includes an inlet controller (9) and an outlet controller (19). The inlet controller (9) is connected to the air supply module and the liquefaction chamber (21) and is used to control the flow rate of air entering the steam generator (17) and the flow rate of water vapor entering the liquefaction chamber (21). The outlet controller (19) is connected to the concentrated seawater collection tank (18), the diversion tank (22) and the freshwater solenoid valve (23) and is used to control the flow rate of concentrated seawater into the concentrated seawater collection tank (18) and to control the diversion of the diversion tank (22).

7. The seawater spray desalination method driven by a combination of solar and tidal energy according to claim 6, characterized in that, A secondary seawater tank (16) is provided between the diversion tank (22) and the circulating mist generator (15). The secondary seawater tank (16) is used to store liquefied water that does not meet the water quality target. A secondary seawater pump (12) for pumping water is provided between the diversion tank (22) and the secondary seawater tank (16). A booster pump (11) and a secondary solenoid valve (10) are provided between the secondary seawater tank (16) and the circulating mist generator (15). The secondary solenoid valve (10) is connected to the inlet controller (9). The inlet controller (9) controls the flow rate of liquefied water that does not meet the water quality target flowing into the circulating mist generator (15) through the secondary solenoid valve (10).

8. The seawater spray desalination method driven by a combination of solar and tidal energy according to claim 1, characterized in that, Includes the following steps: Step 1: Seawater in the seawater pool (6) is fed into the vortex mist generator (13), and then the vortex mist generator (13) atomizes the seawater into mist droplets; Step 2: The air is accelerated and heated by the air supply module, and finally enters the steam generation tank (17) through the gas pipeline to exchange heat with the mist droplets, thereby generating water vapor; Step 3: The concentration of seawater will increase after heat exchange and become concentrated seawater. The concentrated seawater enters the concentrated seawater collection tank (18) through the pipe at the bottom of the steam generating tank (17). The generated water vapor enters the liquefaction chamber (21) by air. The water vapor is liquefied in the liquefaction chamber (21) to become liquefied water. Step 4: The liquefied water in the liquefaction chamber (21) enters the distribution tank (22). At this time, the liquefied water will be analyzed for water quality. If the analysis results do not meet the water quality target, the liquefied water will enter the circulating mist generator (15) to regenerate seawater droplets. Step 5: The liquefied freshwater flows through the freshwater solenoid valve (23) into the freshwater storage tank (30) below; the storage tank is equipped with a freshwater quality monitoring system, which adjusts the air and seawater flow rates according to the monitored conditions.

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