Seawater desalination and collection device and seawater desalination and collection system based on self-rotating floating ball

Abstract

The invention relates to a sea water desalination and collection device and system based on a self-rotating floating ball, the sea water desalination and collection device comprises a supporting seat, a conical transparent condensation cover and a floating ball evaporation unit, the condensation cover is hermetically mounted on the upper surface of the supporting seat to form an evaporation and condensation cavity; a convex ring is arranged on the upper surface of the supporting seat and located in the condensation cover, a mounting groove defined by the convex ring is used for mounting a floating ball evaporation unit, the outside of the convex ring and the side wall of the condensation cover form a water collecting groove, and the water collecting groove is communicated with the top of the condensation cover through the distance between the top of the convex ring and the side wall of the condensation cover, so that condensed fresh water flows into the water collecting groove; the groove bottom of the mounting groove defined by the convex ring is of a grid structure, and each grid of the grid structure penetrates through the supporting seat, so that seawater enters the evaporation and condensation cavity through the grids; the floating ball evaporation unit comprises a plurality of evaporation floating balls, the evaporation floating balls are arranged in one-to-one correspondence with the grids, and the sizes of the grids are larger than those of the evaporation floating balls; and the outer surface of the evaporation floating ball is coated with a photo-thermal conversion material. The seawater desalination and collection efficiency is effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of seawater desalination, and particularly relates to a seawater desalination collection device and a seawater desalination collection system based on self-rotating floating balls. Background Art

[0002] Solar seawater desalination technology has become an important way to solve the problem of freshwater shortage due to its characteristics of environmental protection and low energy consumption. Existing seawater desalination technologies mainly include two-dimensional planar evaporators (porous membranes, hydrogel sheets), three-dimensional solid evaporators (conical, hemispherical evaporators), but these technologies still face the following important problems in practical applications: the effective evaporation area of traditional two-dimensional evaporators decreases significantly with the change of the solar altitude angle, especially the efficiency drops sharply in the early morning or evening; moreover, during the evaporation process, salts crystallize on the surface of the above-mentioned evaporators, hindering light absorption and water transmission, resulting in a continuous decline in efficiency, requiring periodic cleaning or complex salt discharge channels, increasing the maintenance cost, and it is difficult to achieve full-automatic operation. Summary of the Invention

[0003] Based on the above-mentioned disadvantages and deficiencies existing in the prior art, one of the purposes of the present invention is to at least solve one or more of the above problems existing in the prior art. In other words, one of the purposes of the present invention is to provide a seawater desalination collection device based on self-rotating floating balls that meets one or more of the foregoing requirements.

[0004] In order to achieve the above-mentioned invention purpose, the present invention adopts the following technical solutions:

[0005] A seawater desalination collection device based on self-rotating floating balls includes a support base, a conical transparent condensation cover, and a floating ball evaporation unit. The conical transparent condensation cover is sealed and installed on the upper surface of the support base to form an evaporation and condensation cavity; the upper surface of the support base has a convex ring, the convex ring is located inside the conical transparent condensation cover, and the installation groove surrounded by the convex ring is used to install the floating ball evaporation unit. The space between the outside of the convex ring and the side wall of the conical transparent condensation cover forms a water collection tank, and the water collection tank is communicated with the top of the conical transparent condensation cover through the gap between the top of the convex ring and the side wall of the conical transparent condensation cover, so that the condensed fresh water can flow into the water collection tank;

[0006] The bottom of the installation groove surrounded by the convex ring is a grid structure, and each grid of the grid structure penetrates the support base, so that seawater can enter the evaporation and condensation cavity through the grid;

[0007] The floating ball evaporation unit includes several evaporation floating balls, and the evaporation floating balls are placed corresponding to the grids one by one, and the size of the grid is larger than the size of the evaporation floating balls; among them, the outer surface of the evaporation floating balls is coated with a photothermal conversion material.

[0008] As a preferred solution, the top of the conical transparent condensation cover has a ventilation hole.

[0009] As a preferred solution, the inner surface of the conical transparent condensation cover has a hydrophobic layer.

[0010] As a preferred solution, the core of the evaporation floating ball is a lightweight foam ball, which is coated with a porous cellulose hydrogel on the outside, and a photothermal conversion material is coated on the outside of the porous cellulose hydrogel.

[0011] As a preferred solution, the bottom of the water collection tank has flow guiding ribs.

[0012] As a preferred solution, the conical transparent condensation cover is detachably installed on the support base.

[0013] As a preferred solution, the evaporation floating ball floats on the seawater, and the volume above the water surface is not less than 50%.

[0014] As a preferred solution, the diameter of the evaporation floating ball is 15 - 60 mm, the grid is square, and the side length of the grid is greater than the diameter of the evaporation floating ball.

[0015] As a preferred solution, the photothermal conversion material is one or a combination of polypyrrole, polyaniline, polydopamine, graphene, carbon nanotubes, carbon black, aluminum and its alloys, titanium dioxide, copper sulfide, molybdenum disulfide.

[0016] The present invention also provides a seawater desalination and collection system, which includes several seawater desalination and collection devices as described in any one of the above solutions, and adjacent seawater desalination and collection devices are detachably connected through support bases.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] (1) The seawater desalination and collection device of the present invention adopts a conical transparent condensation cover, which can improve the collection efficiency of condensed water compared with the traditional hemispherical design, and can be improved by about 30%, and the daily water production reaches 2.5 L / m 2 ;

[0019] (2) The grid structure designed by the present invention can not only keep the positions of the evaporation floating balls, but also allow the evaporation floating balls to rotate freely according to the influence of gravity drive; each grid is compatible with the self-rotation of the evaporation floating balls. Due to the deposition of salts, the self-rotation occurs, the salts contact the seawater, and the salt particles fall off and dissolve into the water, which can maintain efficient long-term operation, and the salt cleaning cycle can be extended to more than 28 days;

[0020] (2) The conical condensation cover of the present invention is provided with ventilation holes at the top position, which can realize the balanced adjustment of the internal and external air pressures;

[0021] (3) The inner surface of the conical condensation cover of the present invention is designed with a hydrophobic layer to enhance its waterproof performance and reduce water adhesion;

[0022] (4) The diversion ribs designed at the bottom of the water collection tank of the present invention can optimize the flow direction of condensed water and ensure its efficient inflow into the water storage container;

[0023] (5) The seawater desalination and collection device of the present invention is modularly designed, and can be expanded at low cost on a large scale to form a seawater desalination and collection system, realizing large-area seawater desalination and collection. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the seawater desalination and collection device according to Embodiment 1 of the present invention;

[0025] Figure 2 is a sectional view of the seawater desalination and collection device according to Embodiment 1 of the present invention;

[0026] Figure 3 is a schematic diagram of the evaporation floating balls and the grid structure according to Embodiment 1 of the present invention. Detailed Embodiments

[0027] In order to more clearly illustrate the embodiments of the present invention, the following will describe the specific embodiments of the present invention with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other embodiments can be obtained.

[0028] Embodiment 1:

[0029] As Figures 1 to 3 shown, the seawater desalination and collection device based on self-rotating floating balls in this embodiment includes a support base 1, a conical transparent condensation cover 2, and a floating ball evaporation unit 3. Among them, the floating ball evaporation unit 3 includes several evaporation floating balls 30.

[0030] The support base 1 of this embodiment is a disc-shaped structure. The upper surface of the support base 1 has a coaxial convex ring 10. The installation groove 11 enclosed by the convex ring is used to install the floating ball evaporation unit 3; among them, the bottom of the installation groove 11 enclosed by the convex ring is a grid structure, and each grid G of the grid structure penetrates the support base 1 so that seawater can pass through the grid G. The support base 1 of this embodiment is designed to provide a stable foundation to carry the condensation cover and related components installed thereon. In particular, the support base 1 limits the evaporation floating balls through the grid structure. The grid structure can not only firmly hold the positions of the evaporation floating balls, but also allow them to rotate freely under the influence of gravity drive, maximizing the contact area of each evaporation floating ball with sunlight, thereby improving the evaporation efficiency. In addition, the support base 1 also plays a role in supporting the condensation cover 2 to ensure its stability, so as to effectively collect the condensed water generated by the evaporation process.

[0031] Specifically, the material of the support base 1 is a lightweight buoyant material (such as EPS foam) and can be integrally formed. In this embodiment, the evaporation floating balls 30 are placed one-to-one corresponding to the grids G, and the size of the grids G is larger than that of the evaporation floating balls 30; the core of the evaporation floating balls 30 in this embodiment is a lightweight foam ball, and the outside of the foam ball is wrapped with porous cellulose hydrogel (hereinafter referred to as PPy-CHFB, which is obtained by coating a solution prepared by dissolving cotton with maleic acid and sulfuric acid, specifically, it can refer to the prior art) to achieve efficient water adsorption and release; the outer layer of PPy-CHFB is further wrapped with polypyrrole, and this material, as an efficient photothermal conversion material, can effectively absorb sunlight and convert it into heat energy, thereby accelerating the evaporation process of water. The diameter range of the evaporation floating balls 30 is precisely controlled between 15 and 60 mm to optimize their buoyancy and stability under different environmental conditions; as an example, the diameter of the evaporation floating balls 30 in this embodiment is 60 mm, the grid is square, and the side length is 65 mm. In particular, the evaporation floating balls are designed with an autonomous rotation function. The rotation of the small balls is driven by salt deposition during evaporation, so that the salt contacts the water surface, ensuring that each evaporation floating ball can be evenly distributed on the water surface of the water body and maximally exposed to sunlight, thereby improving the overall evaporation efficiency. Moreover, the evaporation floating balls 30 float on the water surface, and the salt is shed through self-rotation caused by salt deposition; the movement space of the evaporation floating balls 30 is restricted by the grid structure, allowing the evaporation floating balls 30 to rotate freely. In addition, the evaporation floating balls in this embodiment float on seawater, and the volume above the water surface is not less than 50%.

[0032] The evaporation floating balls in this embodiment can also refer to the previous research results disclosed in the publication number CN115403092A, which will not be elaborated here.

[0033] The conical transparent condensation cover 2 in this embodiment is hermetically installed on the upper surface of the support base 1 to form an evaporation condensation cavity Q. The specific installation structure adopts a detachable installation, such as existing conventional methods such as plugging and clamping, and can be horizontally expanded into a multi-unit array to meet the large-area seawater desalination requirements. Correspondingly, a water collection tank 4 is formed between the outside of the convex ring 10 of the support base 1 in this embodiment and the side wall of the conical transparent condensation cover 2. The water collection tank 4 is communicated with the top of the conical transparent condensation cover 2 through the spacing between the top of the convex ring and the side wall of the conical transparent condensation cover 2, so that the condensed fresh water can flow into the water collection tank 4.

[0034] The above conical transparent condensation cover 2 is made of a transparent material with excellent weather resistance, including but not limited to polycarbonate. A hydrophobic coating is further applied to the inner surface of the condensation cover to enhance its waterproof performance and reduce water adhesion. In particular, the angle range of the cone angle in the conical transparent condensation cover 2 is precisely set between 60° and 90° to optimize hydrodynamic characteristics and structural stability. As an example, the cone angle in the condensation cover 2 is designed to be 60°. In addition, at least one ventilation hole 20 is provided at the top position of the conical transparent condensation cover 2 to achieve balanced adjustment of the internal and external air pressures, thereby ensuring the stability of the internal environment of the structure.

[0035] The water collection tank 4 of this embodiment has an annular tank structure, which is designed to be hermetically arranged around the bottom of the condensation cover. Among them, a flow guide rib 40 is provided at the bottom of the water collection tank 4 to guide the condensed water into a water storage container communicated with the water collection tank, that is, a plurality of flow guide ribs are arranged inside the annular tank body. The purpose is to optimize the flow direction of the condensed water. By guiding the condensed water to flow along a predetermined path, it is ensured that the condensed water can flow from the annular tank body into the connected water storage container efficiently and unobstructedly, effectively collecting and guiding the fresh water gathered by the conical transparent condensation cover 2.

[0036] The operation process of the seawater desalination and collection device of this embodiment is as follows: Place the support base on the seawater, put evaporation floating balls into each grid corresponding to the grid structure, and then seal and install the conical transparent condensation cover. The evaporation floating balls continuously absorb water through capillary action and are evaporated by solar energy. The evaporated water vapor rises to the condensation cover and condenses into water droplets on its inner wall. Due to the hydrophobic property of the inner wall, the water droplets slide down along the conical surface to the water collection tank, and the water flows along the flow guide ribs to the water storage container communicated with the water collection tank. The evaporation floating balls rotate automatically due to salt deposition. The salt contacts the seawater, and the salt grains fall off and dissolve into the water, which can maintain efficient and long-term operation.

[0037] The seawater desalination and collection device of this embodiment uses a conical transparent condensation cover, which can improve the collection efficiency of condensed water compared with the traditional hemispherical design, and can be increased by about 30%. The daily water production reaches 2.5L / m 2 ; In addition, the grid structure designed in this embodiment can not only keep the positions of the evaporation floating balls, but also allow the evaporation floating balls to rotate freely according to the influence of gravity drive. Each grid is compatible with the self-rotation of the evaporation floating balls. Due to salt deposition, the evaporation floating balls rotate automatically. The salt contacts the seawater, and the salt grains fall off and dissolve into the water, which can maintain efficient and long-term operation. The salt cleaning cycle can be extended to more than 28 days.

[0038] In addition, the seawater desalination and collection system of this embodiment includes several of the above-mentioned seawater desalination and collection devices. Adjacent seawater desalination and collection devices are connected in series through detachable connections (such as plugging, clamping and other existing connection methods) of the support base to achieve large-area seawater desalination and collection.

[0039] Example 2:

[0040] The difference between the seawater desalination and collection device of this embodiment and that of Embodiment 1 is:

[0041] The core of the evaporation floating ball in this embodiment is a lightweight foam ball, and the outside of the foam ball is directly wrapped with polypyrrole, which can also effectively absorb sunlight and convert it into heat energy, thereby accelerating the evaporation process of water; meeting the needs of different applications;

[0042] Other structures can refer to Embodiment 1.

[0043] Example 3:

[0044] The difference between the seawater desalination and collection device of this embodiment and that of Embodiment 1 is:

[0045] The photothermal conversion material can also be a combination of one or more of polypyrrole, polyaniline, polydopamine, graphene, carbon nanotubes, carbon black, aluminum and its alloys, titanium dioxide, copper sulfide, molybdenum disulfide, etc., which can be specifically determined according to actual needs;

[0046] Other structures can refer to Embodiment 1.

[0047] The above is only a detailed description of the preferred embodiments and principles of the present invention. For those of ordinary skill in the art, according to the idea provided by the present invention, there will be changes in the specific implementation manners, and these changes should also be regarded as the protection scope of the present invention.

Claims

1. A seawater desalination and collection device based on a self-rotating floating ball, characterized in that It includes a support base, a conical transparent condensation cover, and a floating ball evaporation unit. The conical transparent condensation cover is hermetically installed on the upper surface of the support base to form an evaporation and condensation chamber; the upper surface of the support base has a convex ring. The convex ring is located inside the conical transparent condensation cover. The installation groove enclosed by the convex ring is used to install the floating ball evaporation unit. The space between the outside of the convex ring and the side wall of the conical transparent condensation cover forms a water collection tank. The water collection tank is communicated with the top of the conical transparent condensation cover through the gap between the top of the convex ring and the side wall of the conical transparent condensation cover, so that the condensed fresh water can flow into the water collection tank; The bottom of the installation groove enclosed by the convex ring is a grid structure, and each grid of the grid structure penetrates the support base, so that seawater can enter the evaporation and condensation chamber through the grid; The floating ball evaporation unit includes several evaporation floating balls. The evaporation floating balls are placed corresponding to the grids one by one, and the size of the grid is larger than the size of the evaporation floating ball; among them, the outer surface of the evaporation floating ball is coated with a photothermal conversion material.

2. The seawater desalination and collection device according to claim 1, characterized in that, The top of the conical transparent condensation cover has a ventilation hole.

3. The seawater desalination and collection device according to claim 1, wherein, The inner surface of the conical transparent condensation cover has a hydrophobic layer.

4. The seawater desalination and collection device according to claim 1, characterized in that, The core of the evaporation floating ball is a lightweight foam ball, the outside of the core is coated with a porous cellulose hydrogel, and the outside of the porous cellulose hydrogel is coated with a photothermal conversion material.

5. The seawater desalination and collection device according to claim 1, characterized in that, The bottom of the water collection tank has a flow guiding rib.

6. The seawater desalination and collection device according to claim 1, characterized in that, The conical transparent condensation cover and the support base are detachably installed.

7. The seawater desalination and collection device according to claim 1, characterized in that The evaporation floating ball floats on the seawater, and the volume above the water surface is not less than 50%.

8. The seawater desalination and collection device according to claim 1, characterized in that, The diameter of the evaporation floating ball is 15 - 60 mm, the grid is square, and the side length of the grid is larger than the diameter of the evaporation floating ball.

9. The seawater desalination and collection device according to claim 1, characterized in that, The photothermal conversion material is one or a combination of polypyrrole, polyaniline, polydopamine, graphene, carbon nanotubes, carbon black, aluminum and its alloys, titanium dioxide, copper sulfide, molybdenum disulfide, etc.

10. A seawater desalination and collection system, characterized in that, It includes several seawater desalination and collection devices as described in any one of claims 1 - 9. Adjacent seawater desalination and collection devices are detachably connected through the support base.

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