Zero-carbon running water-salt co-production system utilizing natural energy

Abstract

The invention discloses a water-salt co-production system using natural energy for zero-carbon operation, and belongs to the technical field of seawater desalination. According to the technical scheme, the device comprises a sunlight shed, a plurality of brine tanks are arranged in the sunlight shed, and the brine tanks are connected with a brine tank through pipelines; a plurality of cloth curtains are hung above the brine tank in the sunlight shed, and the lower ends of the cloth curtains are immersed in brine in the brine tank; a fresh water collecting tank and a rainwater collecting tank are arranged at the bottom of the sunlight shed, the fresh water collecting tank is positioned inside the sunlight shed, the rainwater collecting tank is positioned outside the sunlight shed, and the fresh water collecting tank and the rainwater collecting tank are respectively connected with the fresh water tank through pipelines. Natural energy such as solar energy, wind energy and ground temperature energy is utilized to comprehensively utilize brine, all-day operation is achieved, water and salt are obtained, fresh water can be obtained in sunny and rainy days, and zero-carbon water and salt co-production is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of seawater desalination, and in particular to a water-salt cogeneration system that utilizes natural energy and operates in a zero-carbon manner. Background Art

[0002] Traditional desalination methods, whether membrane, thermal, or electrodialysis, consume vast amounts of energy and generate significant carbon dioxide emissions. Simply put, freshwater is exchanged for energy, and desalination produces large amounts of concentrated brine, which in turn harms marine life. The comprehensive utilization of brine is a future development direction, and the extraction of salt metals from brine through the combined production of water and salt is also accomplished through a multi-unit process.

[0003] Regardless of whether it is brine from seawater desalination or brine from natural salt lakes, the extraction methods used to extract metals from salt, such as extraction, calcination, adsorption, membrane, electrodialysis, precipitation, and solar ponds, all have various shortcomings, such as high energy consumption, environmental pollution, high material consumption, low efficiency, and waste of water resources.

[0004] Princeton University in the United States has unveiled a lithium extraction technology using porous fiber rope crystallization, which is significantly more advanced than traditional methods. However, its disadvantages are that it wastes water resources and is greatly affected by the environment when used, especially in winter when temperatures are low and it cannot operate normally.

[0005] Chinese utility model patent CN215516713U discloses a seawater desalination device and system. This patent utilizes solar energy to evaporate seawater and achieve separation of freshwater and brine. Multiple desalination devices are combined to improve desalination efficiency. However, this patent has a complex structure and significant limitations in solar energy utilization and desalination efficiency.

[0006] Therefore, it is necessary to develop a water-salt cogeneration system that can reduce energy consumption, is less affected by the application environment and has a relatively simple structure. Summary of the Invention

[0007] The technical problem to be solved by the present invention is: to overcome the shortcomings of the existing technology and provide a water-salt cogeneration system that utilizes natural energy and operates with zero carbon. It uses natural energy such as solar energy, wind energy and geothermal energy to comprehensively utilize brine, operates all-weather, and obtains both water and salt. Fresh water can be obtained on sunny and rainy days, realizing zero-carbon water-salt cogeneration.

[0008] The technical solution of the present invention is:

[0009] The water-salt cogeneration system that utilizes natural energy and operates with zero carbon includes a sun shed with several brine troughs installed in the sun shed, which are connected to the brine tank through pipes; several curtains are hung above the brine troughs in the sun shed, and the lower ends of the curtains are immersed in the brine in the brine troughs; a fresh water collection trough and a rainwater collection trough are provided at the bottom of the sun shed, the fresh water collection trough is located inside the sun shed, and the rainwater collection trough is located outside the sun shed, and the fresh water collection trough and the rainwater collection trough are respectively connected to the fresh water tank through pipes.

[0010] Preferably, a plurality of steam pipes are provided on the upper part of the sun shed, each of which is provided with a valve. The steam pipes are connected to the air inlet of the condenser, the liquid inlet of the condenser is connected to the heat exchange well through a pipeline, and the liquid outlet of the condenser is connected to the fresh water tank through a pipeline.

[0011] Preferably, the water vapor pipe is connected to the hot air inlet of the heat exchanger, the liquid outlet of the heat exchanger is connected to the fresh water tank through a pipeline, and the hot air outlet of the heat exchanger is connected to several hot air pipes through pipelines. The hot air pipes are laid in the sun shed and several hot air outlets are arranged at intervals on the hot air pipes.

[0012] Preferably, a plurality of inverted U-shaped operating channels are provided in the sun shed, the operating channels are covered above the hot air pipes and air outlets are provided at the hot air outlets corresponding to the hot air pipes.

[0013] Preferably, the cloth curtains above the brine tank are divided into several groups, each group includes several cloth curtains, adjacent cloth curtains in each group are next to each other, there are gaps between groups, and the air outlet of the operating channel is located in the gap.

[0014] Preferably, the floor in the sun shed has a structure of being convex in the middle and concave on both sides or concave in the middle and convex on both sides, and a floor drain is provided in the concave part of the floor, and the floor drain is connected to the fresh water tank through a pipeline.

[0015] Preferably, a wind turbine is provided on the top of the sun shed, and a photovoltaic panel is provided on the top or lower sun-facing side of the sun shed.

[0016] Preferably, when the length of the sunroof is arranged along the east-west direction, the curtain faces east-west; when the length of the sunroof is arranged along the north-south direction, the curtain faces east-west or north-south.

[0017] Preferably, the curtain is provided with wavy folds.

[0018] Preferably, a hanging support frame is provided in the sun shed, a plurality of hanging rods are provided on the hanging support frame, a plurality of hanging rings are provided on the hanging rods, and curtains are hung on the hanging rings through hanging clips.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The water-salt co-production system of the present invention utilizes natural energy and operates with zero carbon, and comprehensively utilizes brine using natural energy such as geothermal energy, wind energy, and solar energy. It operates around the clock, and can produce both water and salt, and fresh water can be obtained on sunny and rainy days. It is suitable for salt production from brine from seawater desalination and brine from natural salt lakes, and has the advantages of high efficiency, environmental protection, zero carbon, low cost, and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 This is a structural diagram of the water-salt cogeneration system of the present invention that utilizes natural energy and operates with zero carbon.

[0023] Figure 2 It is a structural schematic diagram of the arched structure sun shed of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the single-slope structure sun shed of the present invention.

[0025] Figure 4 It is a structural schematic diagram of the gable double-slope structure sun shed of the present invention.

[0026] Figure 5 It is a structural schematic diagram of the hanging support frame of the present invention.

[0027] Figure 6 It is a structural schematic diagram of the suspension rod, hanging ring and hanging clamp of the present invention.

[0028] Figure 7 It is a structural schematic diagram of the hot air pipe and the operating channel of the present invention.

[0029] Figure 8 It is a structural schematic diagram of a floor drain of the present invention.

[0030] Figure 9 It is a schematic diagram of the installation position of the photovoltaic panel of the present invention.

[0031] In the figure, 1. sun shed; 101. transparent enclosure; 102. support frame; 103. vertical wall; 2. brine trough; 3. brine tank; 4. curtain; 501. fresh water collection trough; 502. rainwater collection trough; 6. fresh water tank; 7. steam pipe; 8. condenser; 9. heat exchange well; 10. heat exchanger; 11. hot air pipe; 12. operation channel; 13. floor drain; 14. wind turbine; 15. photovoltaic panel; 16. hanging support frame; 17. hanging rod; 18. hanging ring; 19. hanging clamp; 20. pump; 21. fan; 22. thermal blanket. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0033] Example 1

[0034] like Figure 1 As shown, this embodiment provides a water-salt cogeneration system that utilizes natural energy and operates with zero carbon emissions. The system includes a sun shed 1, within which are disposed a plurality of brine tanks 2 connected to a brine tank 3 via pipelines equipped with a pump 20. The brine tank 3 is located outside the sun shed 1. The brine tanks 2 can be rectangular or U-shaped and can be made of ceramic, thermosetting plastic FRP (glass fiber reinforced plastic), or thermoplastic plastics such as PPR, PVC, and PE, or metal such as SUS304 stainless steel, which is required to be resistant to salt corrosion. The width of the brine tanks 2 can be 0.2-3 mm, for example, the length, width, and height of the brine tanks 2 can be 18 m × 1.3 m × 0.6 m. The brine tanks 2 can be arranged in one or more rows on the floor of the shed, with each row of brine tanks 2 spaced 0.3 m apart. A liquid level gauge can be provided in each brine tank 2 to maintain a normal liquid level.

[0035] The sun shed 1 includes a support frame 102, which can be constructed with a steel structure. A transparent enclosure 101 is provided on the support frame 102. The transparent enclosure 101 is made of a drip-free film, a transparent plate or low-iron insulating glass. The inner surface of the low-iron insulating glass is sprayed with an anti-fog agent (such as an anti-fog transparent nano-silica coating). The transparent enclosure 101 can be made of a highly transparent thin plate or thick film such as PVC, PC, PE, EVA, PET, BOPET, etc., and can be multi-layer or single-layer; the support frame 102 is fixed to the transparent enclosure 101 as a whole and can be arranged inside or outside the transparent enclosure 101. When the support frame 102 is arranged inside the transparent enclosure 101, it can be an arched structure. When the support frame 102 is arranged outside the transparent enclosure 101, it can be an arched or triangular structure (such as Figure 5 (As shown). Transparent enclosure 101 is installed and fixed using a combination of mechanical fixation (such as screws) and adhesive. When screws are used to fix transparent enclosure 101, they can be used in conjunction with pressure strips. φ6mm hot-dip galvanized self-tapping screws and PVC weather-resistant pressure strips 50mm×40mm are used. The adhesive used is a PU (polyurethane) two-component agricultural film adhesive or silicone adhesive.

[0036] In addition, in this embodiment, Figure 2-4 As shown, the sun shed 1 can be an arch structure, a single-slope structure, or a herringbone double-slope structure. Among them, if the sun shed 1 is a single-slope structure, the front is a transparent enclosure 101, and the back is a non-transparent vertical wall 103. The vertical wall 103 uses a color steel-PU-color steel insulation composite panel, and the insulation composite panel is fixed on the steel structure to increase its thermal insulation. When the sun shed 1 is an arch structure or a herringbone double-slope structure, it can be east-west or north-south, and can receive sunlight from the east, west, and south directions; and when the sun shed 1 is a single-slope structure, it is east-west, so that more sunlight can pass through the sun shed 1 into the shed. The width of the sun shed 1 is 3-30m, and the length is not limited, and multiple sun sheds 1 can be arranged in parallel to form a large-scale array.

[0037] When the sun shed 1 adopts an arched structure and the transparent enclosure 101 adopts a transparent PC board, the support frame 102 can be an external steel structure, which can be arched or triangular (such as Figure 5 When installing the steel structure externally, a transparent PC sheet can be installed inside the steel structure after it is installed. Utilizing the PC sheet's elasticity and flexibility, the desired arched structure can be prefabricated and mechanically secured to the top, sides, and bottom of the external support frame 102. The external steel structure reduces the generation of mist droplets from the steel support frame 102 within the enclosure within the shed, allowing fresh water to drip into the shed rather than being collected in the fresh water collection tank 501, thus avoiding water waste.

[0038] When a sun shed 1 adopts a single-slope structure, it must be arranged in an east-west orientation, with a transparent enclosure 101 on the sunny side and an insulating composite panel on the shady side (i.e., north). For example, transparent enclosure 101 may be made of 2mm-thick BOPET film, and wall 103 may be constructed of a composite panel consisting of 0.5mm color-coated steel, 100mm Pu, and 0.5mm PU color-coated steel. Furthermore, the vertical columns of wall 103 should be 80mm×80mm×2mm hot-dip Q235 rectangular steel, with a spacing of 2m. The entire sun shed 1 should have a ridge height of 6m and a width of 15m.

[0039] When the sun shed 1 is a double-slope gable structure, it can be arranged in a north-south or east-west direction, and can be arranged as follows: the steel structure of the support frame 102 is 50mm×100mm×2mm, the hot-dip galvanized vertical columns and the horizontal tie rods between the vertical columns are 40mm×60mm×1.5mm, the column spacing is 1.2m, the rod spacing is 0.8m, the ridge height of the entire sun shed 1 is 6.5m, the width is 24m, and the vertical wall 103 is 4.5m high.

[0040] In this embodiment, the transparent enclosure 101 of the sunroof 1 has the following main technical specifications depending on the material and structure:

[0041] a. Arched transparent PC board (built into support frame 102)

[0042] 1) Wind load ≥35m / s;

[0043] 2) Snow load ≥ 0.6kn / m 2 ;

[0044] 3) Earthquake resistance intensity 9 degrees;

[0045] 4) Light transmittance ≥ 90%.

[0046] b. Arched transparent PC board (support frame 102 is external)

[0047] 1) Wind load ≥ 28m / s;

[0048] 2) Snow load ≥ 0.4kn / m 2 ;

[0049] 3) Earthquake resistance intensity 9 degrees;

[0050] 4) Light transmittance ≥ 90%.

[0051] c. PC board (single slope structure)

[0052] 1) Wind load ≥35m / s;

[0053] 2) Snow load ≥ 0.7kn / m 2 ;

[0054] 3) Earthquake resistance intensity 9 degrees;

[0055] 4) Light transmittance 90%.

[0056] d. Arched film EVA, PVC, 30 wire (0.3mm)

[0057] 1) Wind load ≥ 23m / s;

[0058] 2) Snow load ≥ 0.39kn / m 2 ;

[0059] 3) Earthquake resistance intensity 9 degrees;

[0060] 4) Light transmittance ≥ 90%.

[0061] like Figure 1 、 5As shown in Figure 6, a hanging support frame 16 is provided within the sun shed 1. The hanging support frame 16 can be made of a steel structure. Several hanging rods 17 are provided on the hanging support frame 16. Several hanging rings 18 are provided on the hanging rods 17. A curtain 4 is suspended from the hanging rings 18 via a hanging clip 19. The curtain 4 is located above the brine tank 2, with its lower end immersed in the brine within the brine tank 2. The width of the brine tank 2 allows one or more curtains 4 to be immersed within the brine tank 2 in the width direction. The hanging rods 17 can be made of metal pipes, carbon steel, plastic-coated steel pipes, or SUS 304 stainless steel, and can be circular or rectangular. The hanging rings 18 can be made of SUS stainless steel or plastic-coated carbon steel, with a diameter of 12 mm and a ring diameter of 100 mm. The hanging force of a single hanging ring 18 is ≥ 0.8 kN. The hanging clips 19 can be made of SUS 304 stainless steel or engineering plastic, and the hanging force of a single clip is ≥ 0.3 kN. When support frame 102 is built into sunroof 1, hanging support frame 16 is connected to support frame 102 of sunroof 1. The crossbeams on hanging support frame 16 serve as crossbeam support for both support frame 102 and hanging support frame 16 of sunroof 1. To increase the water absorption capacity of curtain 4, nylon adhesive tape can be used to create wavy folds on the curtain 4, thereby increasing its length and allowing more brine to be absorbed. Curtain 4 can be a darker color (such as dark gray) to better absorb heat, thereby increasing the evaporation and crystallization rate of the brine.

[0062] In addition, the curtains 4 are made of cotton or linen, or highly absorbent resin fibers, such as terry cloth woven from cotton lint or untwisted yarn, ordinary twill plain weave, bamboo fiber, or wood fiber. The curtains 4 are arranged in several rows within the shed. Due to their flexibility, the curtains 4 can be immersed in the brine tank 2 in a wide-top, narrow-bottom configuration. The following materials and lengths can be used for the curtains 4:

[0063] (1) Cut pile terry cloth, thickness 3mm, hanging height 4.5m, stretched length 20m, color dark gray;

[0064] (2) Degreased linen, 3 mm thick, hanging height 5 m, stretched length 15 m, brown in color;

[0065] (3) 90% absorbent cotton + 10% super absorbent fiber (SAP), thickness 2mm, hanging height 5.5m, untwisted yarn, straightened length 25m, color orange.

[0066] Due to the capillary effect of the hydrophilic curtain 4, the brine in the brine tank 2 will be transferred upward along the curtain 4, the brine will penetrate the curtain 4 and evaporate on the surface of the curtain 4, and the salt in the brine will continuously precipitate and crystallize on the curtain 4. When a certain amount of crystallization is reached, the salt crystals will be collected and desalinated before the curtain 4 can be recycled.

[0067] During the evaporation of brine, water vapor is generated. This water vapor diffuses to the upper middle part of the shed and condenses to form a water film due to the temperature difference between the inside and outside of the shed after contacting the shed 1. Since the inner surface of the transparent enclosure 101 of the shed 1 is drip-free and anti-fog, the water will flow downward along the inner wall of the shed 1. Figure 1-4 As shown in Figures 8 and 9, a freshwater collection trough 501 and a rainwater collection trough 502 can be installed at the bottom of the sunroof 1 (i.e., at the edge fixed to the ground). The freshwater collection trough 501 is located inside the sunroof 1, while the rainwater collection trough 502 is located outside the sunroof 1. The freshwater collection trough 501 and the rainwater collection trough 502 are each connected to the freshwater tank 6 via pipes, and the pipes are equipped with a pump 20. When water flows downward along the inner wall of the sunroof 1, it is collected in the freshwater collection trough 501 and eventually pumped 20 into the freshwater tank 6 for collection. When it rains, rainwater also flows downward along the outer wall of the sunroof 1 into the rainwater collection trough 502 and eventually pumped 20 into the freshwater tank 6 for collection. In addition, to reduce the amount of dust in the rainwater entering the freshwater tank 6, a filter can be installed above the rainwater collection trough 502.

[0068] In addition, if Figure 1-4 As shown in Figures 8 and 9, the freshwater collection trough 501 and the rainwater collection trough 502 can both be constructed using channel steel structures. The bottom of the sunroof 1 is placed within the channel steel structure, which is then divided into two parts, forming the freshwater collection trough 501 inside the sunroof 1 and the rainwater collection trough 502 outside. The width and height of the channel steel structure can be designed as needed to increase or decrease the volume of the freshwater collection trough 501 and the rainwater collection trough 502.

[0069] When the length of the sun shed 1 is set along the east-west direction, the curtains 4 are oriented east-west to prevent sunlight from entering. The curtains 4 in the south row block the sunlight from the curtains 4 in the north row behind them, allowing more sunlight to transfer heat and evaporate brine, thus preventing heat transfer problems. When the length of the sun shed 1 is set along the north-south direction, the curtains 4 can be oriented east-west or north-south. For example:

[0070] a) An east-west arched sunroom 1 is 20m wide and 6m high, with curtains 4 oriented north-south. On January 10th, a sunny day in winter, at 12:00 PM, the ambient temperature outside the sunroom 1 was -20°C. The average temperature of the first row of curtains 4 on the south side of the sunroom 1 was measured to be 58°C, the average temperature of the curtains 4 in the middle was 35°C, and the average temperature of the first row of curtains 4 on the north side was 17°C. This indicates a temperature difference of 41°C between the first rows of curtains 4 on the south and north sides. On July 1st, a sunny day in summer, the ambient temperature outside the sunroom 1 was 35°C, the average temperature of the first row of curtains 4 on the south side of the sunroom 1 was 72°C, the average temperature of the curtains 4 in the middle was 58°C, and the average temperature of the first row of curtains 4 on the north side was 45°C, resulting in a temperature difference of 27°C between the first rows of curtains 4 on the south and north sides. It can be seen from this that when the sun shed 1 faces east and west, due to the small angle of incidence of sunlight in winter, most of the sunlight shines on the first row of curtains 4 on the south side, causing the curtains 4 to evaporate quickly; and according to the principle of heat upward movement, the first row of curtains 4 on the south side prevents the transfer of heat from south to north to a certain extent, causing a large temperature difference between the north and the south, thereby affecting the normal evaporation of brine in the system.

[0071] b) An east-west arched sunroom 1, 20m wide and 6m high, with curtains 4 oriented east-west. At 12:00 PM on January 10th, a sunny day in winter, the external ambient temperature of sunroom 1 was -20°C. The average temperature of the first row of curtains 4 on the south side of sunroom 1 was measured to be 47°C, the average temperature of the curtains 4 in the middle was 42°C, and the average temperature of the first row of curtains 4 on the north side was 36°C. The temperature difference between the first rows of curtains 4 on the south and north sides was 11°C. On July 1st, a sunny day in summer, the external ambient temperature of sunroom 1 was 35°C. The average temperature of the first row of curtains 4 on the south side of sunroom 1 was 68°C, the average temperature of the curtains 4 in the middle was 63°C, and the average temperature of the first row of curtains 4 on the north side was 59°C. The temperature difference between the first rows of curtains 4 on the south and north sides was 9°C.

[0072] In addition, if Figure 1 As shown, a thermal blanket 22 can be installed outside the sun shed 1 and can be retracted or unreeled depending on solar energy utilization and heat preservation needs. For example, during winter nights when ambient temperature is low or on rainy, snowy, or dark days, the blanket 22 can be lowered to cover the shed to reduce heat loss within the space. When light is available, the blanket 22 can be reeled in to allow sunlight to penetrate the shed and facilitate brine evaporation. The blanket 22 and reeling mechanism are similar to those used in agricultural greenhouses and are primarily used for heat preservation at night or on cloudy or snowy days.

[0073] Working principle:

[0074] When the sunlight radiation passes through the transparent enclosure 101 of the sun shed 1, the light energy is converted into heat energy, which increases the temperature of the space inside the shed and provides heat energy for the evaporation of brine. 2In the salt lake area in western my country, when the temperature in the greenhouse is 25℃ on sunny days in summer, autumn and spring, the temperature can reach 65-90℃. When the temperature in the greenhouse is -25℃ on sunny days in winter, the temperature can reach 40-65℃, which provides good environmental temperature conditions for brine evaporation.

[0075] The brine is transported upward along the cloth curtain 4, immersed in the brine tank 2, due to its capillary effect. The brine permeates the cloth curtain 4 and evaporates on its surface. The generated water vapor diffuses toward the upper center of the shed, exchanging heat with the transparent enclosure 101 at the interface, condensing to form a water film. This water film then flows downward into the freshwater collection tank 501 and, through a pipeline, into the freshwater tank 6, producing desalinated water. During rainy or snowy days, rainwater slides down the outer wall of the transparent enclosure 101 into the rainwater collection tank 502 and is then piped into the freshwater tank 6, ensuring fresh water availability even on rainy days.

[0076] As the brine is continuously transported upward along the curtain 4 by capillary means and continuously evaporates, the salt in the brine is continuously precipitated and crystallized on the curtain 4. When a certain amount of crystallization is reached, the collected salt crystals can be desalinated and the curtain 4 can be recycled.

[0077] In this embodiment, a cloth curtain 4 is used as a carrier for brine evaporation and crystallization, providing support conditions for efficient evaporation of brine; in addition, according to the different solubilities and densities of various metal salts, different crystallization positions are located on the upper and lower parts of the cloth curtain 4, thereby obtaining a better separation effect of different salt types and saving the salt separation and purification process.

[0078] Example 2

[0079] In winter, spring and autumn, due to the large temperature difference between the external environment and the greenhouse temperature, the dew point temperature is easily formed, and the water vapor in the upper part of the greenhouse can condense naturally; in summer, the external environment temperature is higher, especially when the temperature of the light-transmitting side of the greenhouse wall is higher, it is difficult for the water vapor to condense naturally, and forced condensation measures are needed to condense it into desalinated water. Forced condensation measures include: Figure 1 As shown, the upper portion of the sunroof 1 is equipped with several water vapor pipes 7, each equipped with a valve. These pipes 7 are connected to the air inlet of a condenser 8, the liquid inlet of which is connected via a pipeline to a heat exchange well 9. The liquid outlet of the condenser 8 is also connected via a pipeline to a freshwater tank 6, which is equipped with a pump 20. The heat exchange well 9 can be a large pool less than 6 meters deep, a well, or underground brine near a salt lake. The water temperature is around 10 degrees Celsius, providing a natural refrigerant for condensing water vapor. When the brine in the heat exchange well 9 in the salt lake reaches a certain temperature after heat exchange, it can be pumped into the brine tank 3 to raise the brine's base temperature.

[0080] When the forced condensation measure is started, the valve is opened and the water vapor in the upper part of the shed will enter the condenser 8 from the water vapor pipe 7, and then exchange heat with the low-temperature water in the heat exchange well 9, condense into fresh water and pump 20 into the fresh water tank 6 for storage.

[0081] Example 3

[0082] On the basis of Example 2, Figure 1 As shown, the steam pipe 7 is connected to the hot air inlet of the heat exchanger 10, the liquid outlet of the heat exchanger 10 is connected to the fresh water tank 6 through a pipeline, and the hot air outlet of the heat exchanger 10 is connected to a plurality of hot air pipes 11 through pipelines, and a fan 21 is installed on the pipeline; the hot air pipes 11 are laid between the brine tanks 2 in the sun shed 1 and a plurality of hot air outlets are arranged at intervals on the hot air pipes 11.

[0083] During dark nights or rainy days, water vapor enters the heat exchanger 10 through the water vapor pipe 7, exchanges heat with the cold air outside, condenses into fresh water and is pumped 20 into the fresh water tank 6; and the hot air generated during the heat exchange process enters the shed from the bottom through the hot air pipe 11 under the action of the fan 21, thereby increasing the evaporation temperature of the brine in the shed.

[0084] Example 4

[0085] On the basis of Example 3, Figure 7 As shown, a number of inverted U-shaped operating channels 12 are provided in the sunroom 1. The operating channels 12 cover the hot air pipe 11 and an air outlet is provided at the hot air outlet of the hot air pipe 11; the curtains 4 above the brine tank 2 are divided into a number of groups, each group includes a number of curtains 4, and the adjacent curtains 4 in each group are next to each other, and there are gaps between the groups to form a heat transfer channel, and the air outlet of the operating channel 12 is located in the gap.

[0086] The operating channel 12 straddles both sides of the hot air duct 11 and serves two purposes: first, it allows workers to stand on the operating channel 12 to hang and retrieve the curtain 4; second, it acts as a guide, directing hot air along the operating channel 12 and releasing it from the air outlet into the heat transfer channel, allowing the hot air to evaporate the brine on the curtain 4. This prevents the hot air from flowing directly upward, affecting heat diffusion and causing heat waste. The hot air duct 11 can be a 300mm diameter circular tube or a 300mm x 300mm rectangular tube. The top of the operating channel 12 is a 3000mm x 400mm x 2.5mm steel plate, and the two side legs are 80mm x 40mm x 2mm rectangular steel tubes. The operating channel 12 is composed of multiple units spliced together.

[0087] Example 5

[0088] When the support frame 102 is set in the shed, in order to recover the fresh water that condenses on the support frame 102 and drips onto the ground in the shed, Figure 8As shown, the floor inside the sunroof 1 can be designed to have a convex center and concave sides, or concave center and convex sides. A floor drain 13 is installed in the concave area of the floor, connected to the freshwater tank 6 via a pipeline. For example, if the sunroof 1 is 20 meters wide, with the central axis 10 meters below the sides by 50-80 mm, multiple floor drains 13 can be installed at the central axis, with a density of one every 5 meters. The diameter of the floor drain 13 is 200 mm. Alternatively, if the sunroof 1 is 15 meters wide and has a high center and low sides, with the central axis 60 mm above the sides, multiple floor drains 13 can be installed on both sides, with a density of one every 5 meters. The diameter of the floor drain 13 is 200 mm. Fresh water dripping onto the floor inside the sunroof is collected by the floor drains 13 and piped into the freshwater tank 6.

[0089] Example 6

[0090] On the basis of Example 1, Figure 1-5 As shown in Figures 9 and 9, a wind turbine 14 is installed on the top of the sunroof 1, and photovoltaic panels 15 are installed on the top or lower sun-facing side of the sunroof 1. The electricity generated by the wind turbine 14 and photovoltaic panels 15 is stored in a power storage device to supply the system of the present invention. Both the wind turbine 14 and photovoltaic panels 15 are unstable natural energy sources. After generating electricity, it must be promptly stored in the power storage device for use in low-light conditions or extreme weather conditions. The power storage capacity of the power storage device can be designed based on the power generation of the wind and photovoltaic power generation systems designed for the project, as well as the required energy storage time. For example, if the photovoltaic power generation capacity is 240 kW and the wind power generation capacity is 350 kW, the total power storage capacity of the power storage device is 590 kW.

[0091] The photovoltaic panels 15 of this embodiment can be crystalline silicon photovoltaic glass or cadmium telluride, copper indium gallium selenide (CIGS), gallium arsenide (GaAs), or other photovoltaic panels 15. The power storage device can be lithium iron phosphate or nickel-metal hydride batteries, with each shed equipped with a set of lithium iron phosphate batteries for energy storage. If the power storage device uses lithium iron phosphate batteries, the main technical parameters are as follows:

[0092] (1) Model: LF280K

[0093] (2) Nominal voltage / capacity: 3.2V / 280Ah

[0094] (3) Single cell voltage range: 2.5V-3.6V

[0095] (4) Specific energy: 169Wh / kg

[0096] (5) Battery plug box nominal voltage / capacity: 48V / 280Ah

[0097] (6) System performance: 720V / 280Ah×5

[0098] (7) Operating voltage range: 630-821.25V

[0099] (8) Maximum discharge rate: 0.5C.

[0100] All power distribution, electronic appliances, and other power sources for the system of the present invention come from energy storage devices, achieving zero-carbon operation.

[0101] Although the present invention has been described in detail with reference to the accompanying drawings and in conjunction with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and substance of the present invention, persons of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions are intended to fall within the scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A water-salt cogeneration system that uses natural energy and operates with zero carbon emissions, characterized by: The invention comprises a sun shed (1), wherein a plurality of brine troughs (2) are arranged in the sun shed (1), and the brine troughs (2) are connected to a brine tank (3) through pipelines; a plurality of cloth curtains (4) are hung above the brine troughs (2) in the sun shed (1), and the lower ends of the cloth curtains (4) are immersed in the brine in the brine troughs (2); a fresh water collection trough (501) and a rain water collection trough (502) are arranged at the bottom of the sun shed (1), the fresh water collection trough (501) is located inside the sun shed (1), and the rain water collection trough (502) is located outside the sun shed (1), and the fresh water collection trough (501) and the rain water collection trough (502) are respectively connected to the fresh water tank (6) through pipelines.

2. The water-salt cogeneration system utilizing natural energy and operating with zero carbon as claimed in claim 1 is characterized in that: The upper part of the sun shed (1) is provided with a plurality of water vapor pipes (7), each of which is provided with a valve. The water vapor pipes (7) are connected to the air inlet of the condenser (8), the liquid inlet of the condenser (8) is connected to the heat exchange well (9) through a pipeline, and the liquid outlet of the condenser (8) is connected to the fresh water tank (6) through a pipeline.

3. The water-salt cogeneration system utilizing natural energy and operating with zero carbon as claimed in claim 2 is characterized in that: The water vapor pipe (7) is connected to the hot air inlet of the heat exchanger (10), the liquid outlet of the heat exchanger (10) is connected to the fresh water tank (6) through a pipeline, and the hot air outlet of the heat exchanger (10) is connected to a plurality of hot air pipes (11) through pipelines. The hot air pipes (11) are laid in the sun shed (1) and a plurality of hot air outlets are arranged at intervals on the hot air pipes (11).

4. The water-salt cogeneration system utilizing natural energy and operating with zero carbon as claimed in claim 3 is characterized in that: A plurality of inverted U-shaped operating channels (12) are provided in the sun shed (1). The operating channels (12) are covered above the hot air pipe (11) and are provided with air outlets corresponding to the hot air outlets of the hot air pipe (11).

5. The water-salt cogeneration system utilizing natural energy and operating with zero carbon as claimed in claim 4 is characterized in that: The cloth curtains (4) above the brine tank (2) are divided into several groups, each group includes several cloth curtains (4), adjacent cloth curtains (4) in each group are next to each other, there are gaps between the groups, and the air outlet of the operating channel (12) is located in the gap.

6. The water-salt cogeneration system utilizing natural energy and operating with zero carbon as claimed in claim 1 is characterized in that: The floor in the sun shed (1) is in a structure of being convex in the middle and concave on both sides or concave in the middle and convex on both sides, and a floor drain (13) is provided in the concave part of the floor, and the floor drain (13) is connected to the fresh water tank (6) through a pipeline.

7. The water-salt cogeneration system utilizing natural energy and operating with zero carbon as claimed in claim 1, characterized in that: A wind turbine (14) is provided on the top of the sun shed (1), and a photovoltaic panel (15) is provided on the top or the sun-facing side of the lower part of the sun shed (1).

8. The water-salt cogeneration system utilizing natural energy and operating with zero carbon as claimed in claim 1 is characterized in that: When the length of the sunroof (1) is arranged in the east-west direction, the cloth curtain (4) faces east-west; when the length of the sunroof (1) is arranged in the north-south direction, the cloth curtain (4) faces east-west or north-south.

9. The water-salt cogeneration system utilizing natural energy and operating with zero carbon as claimed in claim 1, characterized in that: The cloth curtain (4) is provided with wavy folds.

10. The water-salt cogeneration system utilizing natural energy and operating with zero carbon as claimed in claim 1, characterized in that: A hanging support frame (16) is provided in the sun shed (1), a plurality of hanging rods (17) are provided on the hanging support frame (16), a plurality of hanging rings (18) are provided on the hanging rods (17), and a cloth curtain (4) is hung on the hanging rings (18) via hanging clips (19).

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