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

Abstract

The utility model 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. According to the zero-carbon water-salt co-production device, natural energy sources such as solar energy, wind energy and ground temperature energy are utilized for comprehensively utilizing 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-salt co-production is achieved.

Description

Technical Field

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

[0002] Traditional seawater desalination, whether it is membrane method, thermal method, electrodialysis or other methods, consumes a lot of energy and produces a large amount of carbon dioxide emissions. In short, fresh water is exchanged for energy, and the discharge of a large amount of concentrated salt water (brine) produced by seawater desalination will damage the marine biological ecology. The comprehensive utilization of brine is the future development direction, and the extraction of salt metal substances in brine by water-salt cogeneration is also completed by a multi-unit process.

[0003] Regardless of whether it is brine from seawater desalination or brine from natural salt lakes, the extraction methods, calcination methods, adsorption methods, membrane methods, electrodialysis, precipitation methods, solar ponds, etc. used to extract metals from salt all have various shortcomings, such as high energy consumption, environmental pollution, high consumables, 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 too affected by the environment when used, especially in winter when the temperature is low and it cannot operate normally.

[0005] Chinese utility model patent CN215516713U discloses a seawater desalination device and a seawater desalination system, which utilizes solar energy to evaporate seawater and realizes the separation of fresh water and brine, and combines multiple seawater desalination devices to improve the desalination efficiency. However, the structure of the patent is complex, and the solar energy utilization rate and desalination rate have great limitations.

[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. Utility Model Content

[0007] The technical problem to be solved by the utility model 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, which utilizes natural energy such as solar energy, wind energy and geothermal energy to comprehensively utilize brine, operates all-weather, obtains both water and salt, and can obtain fresh water on sunny and rainy days, thus realizing zero-carbon water-salt cogeneration.

[0008] The technical solution of the utility model is:

[0009] A water-salt cogeneration system that utilizes natural energy and operates with zero carbon, includes a sunroom with a number of brine troughs installed in the sunroom, which are connected to brine tanks through pipelines; a number of curtains are hung above the brine troughs in the sunroom, and the lower ends of the curtains are immersed in the brine in the brine troughs; a fresh water collection trough and a rain water collection trough are installed at the bottom of the sunroom, the fresh water collection trough is located inside the sunroom, and the rain water collection trough is located outside the sunroom, and the fresh water collection trough and the rain water collection trough are respectively connected to the fresh water tank through pipelines.

[0010] Preferably, a plurality of steam pipes are provided on the upper part of the sun shed, valves are provided on the steam pipes, 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, 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 corresponding to the hot air outlets of 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 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 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 arranged on the top of the sun shed, and a photovoltaic panel is arranged 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 cloth curtains are hung on the hanging rings through hanging clips.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model utilizes natural energy and operates with zero carbon, and comprehensively utilizes brine using natural energy such as geothermal energy, wind energy, solar energy, etc. It operates around the clock and can obtain both water and salt, and fresh water can be obtained on both sunny and rainy days. It is suitable for making salt 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 technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of the water-salt cogeneration system of the utility model 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 utility model.

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

[0025] Figure 4 The utility model is a structural schematic diagram of a sun shed with a herringbone double slope structure.

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

[0027] Figure 6 The utility model is a structural schematic diagram of a suspension rod, a hanging ring and a hanging clamp.

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

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

[0030] Fig. 9 It is a schematic diagram of the installation position of the photovoltaic panel of the utility model.

[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 in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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 uses natural energy and operates with zero carbon, including a sun shed 1, in which a plurality of brine tanks 2 are arranged, and the brine tanks 2 are connected to the brine tanks 3 through pipelines, and a pump 20 is arranged on the pipeline, and the brine tanks 3 are located outside the sun shed 1. Among them, the brine tank 2 can be a rectangular or U-shaped structure, and the material can be ceramic material, thermosetting plastic FRP (glass reinforced plastic) or thermoplastic plastic, such as PPR, PVC, PE, or metal, such as SUS304 stainless steel, which is required to be resistant to salt corrosion; the width of the brine tank 2 can be 0.2-3mm, such as the length, width and height of the brine tank 2 are 18m×1.3m×0.6m. The brine tanks 2 are arranged in one row or multiple arrays, placed on the ground in the shed, and the distance between each row of brine tanks 2 can be 0.3m; a liquid level meter can be set in the 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 arranged on the support frame 102. The transparent enclosure 101 adopts a drip-free film, a transparent plate or a 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-silicon dioxide coating). For example, 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 as a whole with the transparent enclosure 101 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). The installation and fixing method of the transparent enclosure 101: a fixing method combining mechanical fixing (such as screws) and adhesive is adopted. When the transparent enclosure 101 is fixed by screws, it can be used in conjunction with a pressure strip, using φ6mm hot-dip galvanized self-tapping screws and PVC weather-resistant pressure strips of 50mm×40mm; the adhesive is PU (polyurethane) two-component agricultural film special adhesive or silicone adhesive.

[0036] In addition, in this embodiment, if Figure 2-4 As shown, the sun shed 1 can be an arched 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 rear 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 arched 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 shine into the shed through the sun shed 1. 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 an arch or a triangle (such as Figure 5 When the steel structure is installed externally, the transparent PC board can be installed inside the steel structure after the steel structure is installed. The PC board is used to prefabricate the required arch structure by using its elasticity and flexibility, and then mechanically fixed to the top, two side tangent points and bottom of the external support frame 102. The external steel structure can reduce the generation of droplets in the enclosure space of the shed by the steel structure support frame 102, so that the fresh water drops into the shed instead of being collected in the fresh water collection tank 501, thereby avoiding the waste of fresh water.

[0038] When the sun shed 1 adopts a single slope structure, it must be set in an east-west direction, with the sun-facing side being a transparent enclosure 101, and the vertical wall 103 on the sun-facing side (i.e., the north side) being an insulating composite board. For example, the transparent enclosure 101 material is a 2mm thick BOPET film, and the vertical wall 103 is a 0.5mm color steel + 100mmPu + 0.5mm PU color steel composite board. At the same time, the vertical columns of the steel structure on the vertical wall 103 are 80mm×80mm×2mm hot-dip Q235 rectangular steel, with a column spacing of 2m; the ridge height of the entire sun shed 1 is 6m, and the width of the shed is 15m.

[0039] When the sun shed 1 is a double-slope structure, it can be arranged in the north-south direction or the 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 sun shed 1 has the following main technical indicators according to different materials and structures:

[0041] a. Arched transparent PC board (built-in 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 , 5 As shown in Figure 6, a hanging support frame 16 is provided in the sun shed 1. The hanging support frame 16 can be made of steel structure. 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. A cloth curtain 4 is hung on the hanging ring 18 through a hanging clip 19. The cloth curtain 4 is located above the brine tank 2 and the lower end is immersed in the brine in the brine tank 2. The width of the brine tank 2 can make one or more cloth curtains 4 immersed in one brine tank 2 in the width direction. Among them, the hanging rod 17 can be made of metal pipe, carbon steel, plastic coated steel pipe or SUS 304 stainless steel, which is a round pipe or a rectangular pipe; the hanging ring 18 can be made of SUS stainless steel or carbon steel with plastic coating, with a thickness of 12mm and a ring diameter of 100mm. The hanging force of a single hanging ring 18 is ≥0.8KN; the hanging clip 19 can be made of stainless steel SUS 304 or engineering plastic material, and the hanging force of a single clip is ≥0.3KN. When the support frame 102 is built into the sun shed 1, the hanging support frame 16 is connected to the support frame 102 of the sun shed 1, and the crossbeam on the hanging support frame 16 can serve as the crossbeam support of the support frame 102 of the sun shed 1 and the hanging support frame 16. In order to increase the water absorption of the curtain 4, nylon adhesive tape can be used to stick wavy folds on the curtain 4, thereby increasing the length of the curtain 4, so that more brine can be absorbed by the curtain 4. The curtain 4 can be a darker color other than white (such as dark gray), which is more conducive to its heat absorption, thereby increasing the evaporation and crystallization rate of the brine.

[0062] In addition, the cloth curtain 4 is made of cotton or linen, and can also be made of highly absorbent resin fiber, such as "terry cloth" woven from cotton lint or untwisted yarn, ordinary twill plain cloth, bamboo fiber or wood fiber, etc. The cloth curtain 4 is arranged in a number of rows in the shed space. Since the cloth curtain 4 is flexible, it can be immersed in the brine tank 2 in a wide upper part and narrow lower part. The material and length of the cloth curtain 4 can be designed as follows:

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

[0064] (2) Absorbent linen, thickness 3 mm, 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, stretched 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 full salt crystals will be collected and desalinated before the curtain 4 can be recycled.

[0067] As the brine continues to evaporate, water vapor will be generated. This part of the water vapor diffuses to the upper middle part of the shed. After contacting the sun shed 1, it condenses to form a water film under the action of the temperature difference between the inside and the outside. Since the inner surface of the transparent enclosure 101 of the sun shed 1 has a drip-free and anti-fog characteristic, the water will flow downward along the inner wall of the sun shed 1. At this time, if Figure 1-4 As shown in FIG. 8 , a fresh water collection tank 501 and a rain water collection tank 502 can be set at the bottom of the sun shed 1 (i.e., the edge fixed to the ground), the fresh water collection tank 501 is located inside the sun shed 1, and the rain water collection tank 502 is located outside the sun shed 1, and the fresh water collection tank 501 and the rain water collection tank 502 are connected to the fresh water tank 6 through pipelines, respectively, and a pump 20 is installed on the pipeline. When the water in the shed flows downward along the inner wall of the sun shed 1, it will be uniformly collected in the fresh water collection tank 501, and finally pumped 20 into the fresh water tank 6 for collection; and when it rains, the rain water will also flow downward along the outer wall of the sun shed 1 into the rain water collection tank 502, and finally pumped 20 into the fresh water tank 6 for collection. In addition, in order to reduce the dust in the rain water from entering the fresh water tank 6, a filter net can be set above the rain water collection tank 502.

[0068] In addition, if Figure 1-4 As shown in FIG. 8 , the fresh water collection tank 501 and the rain water collection tank 502 can both be of channel steel structure, the bottom of the sun shed 1 is placed in the channel steel, and the channel steel is divided into two parts, forming the fresh water collection tank 501 inside the sun shed 1 and the rain water collection tank 502 outside. The width and height of the channel steel can be designed as needed to increase or decrease the volume of the fresh water collection tank 501 and the rain water collection tank 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 of the curtains 4 in the north row behind, which can make the sunlight more fully transfer heat and evaporate brine, and prevent 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 sun shed 1, with a width of 20m, a height of 6m, a height of 4.5m for hanging curtains, and curtains 4 facing north and south. On a sunny day in winter, January 10, at 12:00, the external ambient temperature of the sun shed 1 was -20°C, and the average temperature of the first row of curtains 4 on the south side of the sun shed 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 was 17°C, from which it can be calculated that the temperature difference between the first row of curtains 4 on the south and north was 41°C; on a sunny day in summer, July 1, the external ambient temperature of the sun shed 1 was 35°C, the average temperature of the first row of curtains 4 on the south side of the shed was 72°C, the average temperature of the curtains 4 in the middle was 58°C, the average temperature of the first row of curtains 4 on the north was 45°C, and the temperature difference between the first row of curtains 4 on the south and north was 27°C. It can be seen that when the sun shed 1 faces east-west, due to the small incident angle 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 sun shed 1, with a width of 20m, a height of 6m, a height of 4.5m for hanging curtains, and curtains 4 facing east-west. At 12:00 on a sunny day on January 10 in winter, the external ambient temperature of the sun shed 1 was -20°C, and the average temperature of the first row of curtains 4 on the south side of the sun shed 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 was 36°C, and the temperature difference between the first row of curtains 4 on the south and north was 11°C; while on a sunny day on July 1 in summer, the external ambient temperature of the sun shed 1 was 35°C, the average temperature of the first row of curtains 4 on the south side of the shed 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 was 59°C, and the temperature difference between the first row of curtains 4 on the south and north was 9°C.

[0072] In addition, if Figure 1 As shown, a heat preservation blanket 22 can be arranged outside the sun shed 1, and the heat preservation blanket 22 can be rolled up or unrolled according to the solar energy utilization and heat preservation needs. For example, in winter nights when the ambient temperature is low or it is rainy, snowy, or there is no light, the heat preservation blanket 22 can be put down to cover the shed body to reduce the heat loss in the space inside the shed; when there is light, the heat preservation blanket 22 can be rolled up to facilitate sunlight to enter the shed, which is beneficial to the evaporation of brine. The heat preservation blanket 22 and the rolling mechanism are similar to agricultural sheds, and are mainly used for heat preservation at night or on rainy and snowy days.

[0073] Working principle:

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

[0075] The cloth curtain 4 immersed in the brine tank 2 can transport the brine upward along the cloth curtain 4 due to its capillary effect. The brine penetrates the cloth curtain 4 and evaporates on its surface. The generated water vapor diffuses to the upper middle part of the shed, and condenses with the transparent enclosure 101 at the interface to form a water film, which flows downward into the fresh water collection tank 501 and enters the fresh water tank 6 through the pipeline to obtain desalinated water. When it rains or snows, rainwater slides down through the outer wall of the transparent enclosure 101 to the rainwater collection tank 502 and is transported to the fresh water tank 6 through the pipeline, so that fresh water can be obtained even on rainy days.

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

[0077] In this embodiment, a cloth curtain 4 is used as a carrier for brine evaporation and crystallization, which provides support conditions for efficient evaporation of brine. In addition, according to the different solubilities and densities of various metal salts, different crystallization sites are located at 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, when the external environment temperature is high, especially when the temperature of the light-collecting greenhouse wall is high, 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 are: Figure 1 As shown, a plurality of water vapor pipes 7 are arranged on the upper part of the sun shed 1, and valves are arranged on the water vapor pipes 7. The water vapor pipes 7 are connected to the air inlet of the condenser 8, and the liquid inlet of the condenser 8 is connected to the heat exchange well 9 through a pipeline. The liquid outlet of the condenser 8 is connected to the fresh water tank 6 through a pipeline, and a pump 20 is arranged on the pipeline. The heat exchange well 9 can be underground brine near a large pool, a well, or a salt lake below 6 meters, and the water temperature is more than ten degrees Celsius, which provides a natural refrigerant for condensing water vapor. Among them, when the brine in the heat exchange well 9 in the salt lake area reaches a certain temperature after heat exchange, it can be pumped into the brine tank 3 to increase the base temperature of the brine.

[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 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, 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 plurality of inverted U-shaped operating channels 12 are arranged in the sun shed 1, the operating channels 12 cover the hot air pipe 11 and an air outlet is arranged at the hot air outlet of the hot air pipe 11; the cloth curtains 4 above the brine tank 2 are divided into a plurality of groups, each group includes a plurality of cloth curtains 4, and the adjacent cloth 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 operation channel 12 straddles the two sides of the hot air pipe 11, and has two functions: one is to facilitate the staff to stand on the operation channel 12 to hang the curtain 4; the other is to play a guiding role, so that the hot air flows along the operation channel 12 and is released from the air outlet to the heat transfer channel, so that the hot air evaporates the brine on the curtain 4, and prevents the hot air from going up directly, affecting the heat diffusion and causing heat waste. Among them, the hot air pipe 11 can be a φ300mm round tube, or a 300mm×300mm rectangular tube, the top of the operation channel 12 is a 3000mm×400mm×2.5mm steel plate, and the two side legs are 80mm×40mm×2mm rectangular steel tubes; the operation channel 12 is composed of multiple units spliced ​​in sequence.

[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 on the ground in the shed, Figure 8As shown, the floor in the sun shed 1 can be made into a structure of 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 arranged at the concave part of the floor, and the floor drain 13 is connected to the fresh water tank 6 through a pipeline. For example, if the sun shed 1 is 20m wide, the central axis of the shed is 50-80mm lower than the two sides of the shed at a width of 10m, and multiple floor drains 13 are installed at the central axis position, with an installation density of one every 5m, and the diameter of the floor drain 13 is 200mm; or if the sun shed 1 is 15m wide, it is in a shape of high in the middle and low on both sides, and the central axis is 60mm higher than the two sides, and multiple floor drains 13 are installed on both sides, with an installation density of one every 5m, and the diameter of the floor drain 13 is 200mm. Fresh water dripping on the floor in the shed is collected by the floor drain 13 and enters the fresh water tank 6 through a pipeline.

[0089] Example 6

[0090] On the basis of Example 1, Figure 1-5 As shown in Figures 9 and 10, 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 lower sunny side of the sun shed 1. The electricity generated by the wind turbine 14 and the photovoltaic panel 15 is stored in the power storage device to supply the system of the utility model. The wind turbine 14 and the photovoltaic panel 15 are both unstable natural energy sources. After generating electricity, the power storage device must be used for storage in time to prepare for use in no sunlight or extreme weather. The power storage power of the power storage device can be designed according to the power generation of the wind power generation and photovoltaic power generation installed in the project design, and the required energy storage use time. For example, if the photovoltaic power generation power is 240Kw and the wind power generation power is 350Kw, the total energy storage power of the power storage device is 590Kw.

[0091] The photovoltaic panel 15 of this embodiment can be a photovoltaic glass of crystalline silicon or a photovoltaic panel 15 of cadmium telluride, copper indium gallium selenide (CIGS), gallium arsenide (GaAs), etc. The power storage device can be a lithium iron phosphate or nickel-hydrogen battery, etc., and each shed is equipped with a set of lithium iron phosphate batteries for energy storage. If the power storage device uses a lithium iron phosphate battery, 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 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 power, electronic appliances, etc. for the operation of the utility model system are powered by energy storage devices, thus achieving zero-carbon operation.

[0101] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A water-salt cogeneration system that uses natural energy and operates with zero carbon, 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 using natural energy and zero carbon operation as claimed in claim 1 is characterized in that: A plurality of water vapor pipes (7) are arranged on the upper part of the sun shed (1), and valves are arranged on the water vapor pipes (7). 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 using natural energy and zero carbon operation 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 at zero carbon level as claimed in claim 3, characterized in that: A plurality of inverted U-shaped operating channels (12) are arranged in the sun shed (1); the operating channels (12) cover 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 at zero carbon level as claimed in claim 4, characterized in that: The cloth curtains (4) above the brine tank (2) are divided into a plurality of groups, each group comprising a plurality of cloth curtains (4), adjacent cloth curtains (4) in each group are adjacent 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 at zero carbon level as claimed in claim 1, 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 arranged 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 at zero carbon level as claimed in claim 1, characterized in that: A wind turbine (14) is arranged on the top of the sun shed (1), and a photovoltaic panel (15) is arranged on the top or the sun-facing side of the lower part of the sun shed (1).

8. The water-salt cogeneration system using natural energy and zero carbon operation as claimed in claim 1 is characterized in that: When the length of the sun shed (1) is arranged in the east-west direction, the cloth curtain (4) faces east-west; when the length of the sun shed (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 at zero carbon level 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 at zero carbon level as claimed in claim 1, characterized in that: The sun shed (1) is provided with a hanging support frame (16), 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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