A rotary solar desalination device

Abstract

The present invention relates to a rotary solar seawater desalination device, which includes a cylindrical light-transmitting cover plate, wind blades, a distiller water tank, seawater, a rotating bearing, a support structure, a fresh water collection port and fresh water. A distiller water tank is arranged in the middle of the cylindrical light-transmitting cover plate, and seawater is contained in the distiller water tank. The distiller water tank is supported and fixed by the support structure, and the support structure is a hollow tubular member. The support structure is connected to the cylindrical light-transmitting cover plate through a rotating bearing. A plurality of wind blades are arranged at both the upper and lower ends of the cylindrical light-transmitting cover plate. A fresh water collection port is arranged at the bottom of the cylindrical light-transmitting cover plate. The fresh water is located at the bottom of the cylindrical light-transmitting cover plate. The beneficial effects of the present invention are as follows: For the seawater desalination device with a rotary structure, on the one hand, it can accelerate the convection of the air inside the seawater desalination device; on the other hand, it can carry away the fresh water droplets formed on the inner surface to the lower part through the rotation of the cylindrical light-transmitting cover plate, and at the same time keep the upper part of the cylindrical light-transmitting cover plate dry and not blocking light at all times.

Description

Technical Field

[0001] The present invention belongs to the technical field of water treatment such as solar desalination of seawater / purification of sewage, and more specifically, relates to a rotary solar seawater desalination device. Background Art

[0002] Fresh water is lacking in many parts of the world, and China is a water-scarce country. The earth has huge seawater resources, and using seawater desalination is one of the important means to solve the shortage of fresh water for humans. However, using conventional energy sources for seawater desalination requires consuming a large amount of fossil fuels and also releases a large amount of greenhouse gases, which is very unfavorable to humans. Solar energy is a clean and pollution-free energy source. Therefore, using solar energy for seawater desalination has very important social significance and economic value, and is an effective way to change the current lack of fresh water resources in China. Traditional solar seawater desalination devices consist of three parts: The first part is a seawater tank: responsible for holding seawater; the second part is a condensation cover plate: responsible for receiving solar radiant energy and condensing the hot steam generated by the seawater into droplets and providing a slope for the droplets to slide; and the third part is a fresh water collection device: responsible for collecting the fresh water after desalination is completed. The basic working principle is to coat the bottom of the tank with a black coating to absorb solar energy to the greatest extent. The seawater in the tank is heated and evaporated into hot steam and moves upward. It will encounter the relatively cold condensation cover plate above. The hot steam condenses into fresh water, and under the action of gravity, it is collected by the fresh water collection device along the glass cover plate and finally becomes fresh water. This traditional solar seawater desalination has many disadvantages. For example, when the hot steam generated by the evaporation of seawater inside the tank condenses on the upper glass cover plate, many droplets will be generated. These droplets will produce a light-blocking effect and will also reflect or refract away a part of the solar energy, resulting in a reduction in the efficiency of the entire device. On the other hand, inside the device, natural convection occurs in the air, resulting in a small temperature difference between the evaporation surface and the condensation cover plate, making it not easy to condense. Therefore, how to solve the problem of light blocking caused by droplets generated by the condensation of hot steam and strengthen the convective mass transfer inside the seawater desalination device without consuming non-renewable energy sources is one of the core problems that need to be solved urgently in the field of seawater desalination. Summary of the Invention

[0003] The object of the present invention is to overcome the deficiencies in the prior art and provide a rotary solar seawater desalination device.

[0004] This rotary solar desalination device includes a cylindrical light-transmitting cover plate, wind blades, a distiller water tank, seawater, a rotating bearing, a support structure, a fresh water collection port, and fresh water. A distiller water tank is provided in the middle of the cylindrical light-transmitting cover plate, and seawater is contained in the distiller water tank. The distiller water tank is supported and fixed by a support structure, and the support structure is a hollow tubular member. The support structure is connected to the cylindrical light-transmitting cover plate through a rotating bearing. A plurality of wind blades are provided at both the upper and lower ends of the cylindrical light-transmitting cover plate. A fresh water collection port is provided at the bottom of the cylindrical light-transmitting cover plate. The fresh water is located at the bottom of the cylindrical light-transmitting cover plate.

[0005] Preferably, the material of the cylindrical light-transmitting cover plate is ultra-white glass or colorless transparent acrylic board.

[0006] Preferably, the wind blades are evenly arranged at both the upper and lower ends of the cylindrical light-transmitting cover plate.

[0007] Preferably, the bottom surface of the distiller water tank is coated with a black coating.

[0008] Preferably, the rotating bearing is arranged on the side surface of the cylindrical light-transmitting cover plate. The rotating ring of the rotating bearing is fixed in the side groove of the cylindrical light-transmitting cover plate, and the stationary ring of the rotating bearing is fixed to the horizontal part of the support structure.

[0009] Preferably, a sealing device is arranged at the connection of the rotating bearing. The sealing device is a bearing sealing ring, and two circular protrusions extend upward on one end surface of its circular ring shape. The inner diameter of the protrusion with a smaller diameter matches the outer diameter of the stationary ring of the rotating bearing, and the outer diameter of the protrusion with a larger diameter matches the outer diameter of the rotating ring of the rotating bearing. A layer of sealant is applied to the outside of the bearing sealing ring.

[0010] Preferably, the arrangement mode of the desalination devices is in a linear pattern or a cross pattern.

[0011] The working method of this rotary solar desalination device includes the following steps:

[0012] S1. The cylindrical light-transmitting cover plate rotates under the action of the wind blades;

[0013] S2. The seawater in the distiller water tank is heated and evaporated into water vapor, which turns into liquid droplets when it meets the relatively cold cylindrical light-transmitting cover plate above, and then is brought to the bottom of the cylindrical light-transmitting cover plate under the action of the rotating force;

[0014] S3. When the cylindrical light-transmitting cover plate rotates, the fresh water at the bottom of the cylindrical light-transmitting cover plate will sweep across the liquid droplets at the upper part of the cylindrical light-transmitting cover plate and carry them away;

[0015] S4. When the fresh water accumulates to a certain extent, it is discharged through the fresh water collection port; when the seawater in the distiller water tank is insufficient or the concentrated water needs to be discharged, seawater is provided for the distiller water tank or the concentrated water is discharged through the support structure.

[0016] The beneficial effects of the present invention are as follows:

[0017] (1) The present invention adopts a seawater desalination device with a rotating structure. On the one hand, it can accelerate the convection of air inside the seawater desalination device, improving the efficiency of the system; on the other hand, through the rotation of the cylindrical light-transmitting cover plate, the fresh water droplets formed on the inner surface can be taken to the lower part, accelerating the collection of fresh water, and at the same time keeping the upper part of the cylindrical light-transmitting cover plate dry and non-light-blocking, improving the light energy absorption efficiency.

[0018] (2) The wind blades outside the cylindrical light-transmitting cover plate of the present invention can be designed in various ways. When the wind speed in the area is relatively high, a group of wind blades can be set, and when the wind speed is relatively low, multiple groups of wind blades can be set to meet the requirements under different working conditions.

[0019] (3) The arrangement of the rotary solar seawater desalination device of the present invention can be set as cross-type, one-word type, etc. according to local conditions, with strong flexibility and wide application range.

[0020] (4) The present invention is provided with a rotatable cylindrical light-transmitting cover plate and wind blades, with a reasonable structure, easy to operate, and does not require special management. The operation cost is extremely low, and it is very suitable for areas with relatively large air volume. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the rotary solar seawater desalination device.

[0022] Description of the reference numerals in the drawings: cylindrical light-transmitting cover plate 1, wind blade 2, distiller water tank 3, seawater 4, rotating bearing 5, support structure 6, fresh water collection port 7, fresh water 8, sealing device 9. Detailed Embodiments

[0023] The following further describes the present invention in conjunction with embodiments. The description of the following embodiments is only for helping to understand the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0024] Embodiment 1

[0025] Embodiment 1 of the present application provides a rotary solar seawater desalination device, which includes a cylindrical light-transmitting cover plate 1, a wind blade 2, a distiller water tank 3, seawater 4, a rotating bearing 5, a support structure 6, a fresh water collection port 7, and fresh water 8. A distiller water tank 3 is provided in the middle of the cylindrical light-transmitting cover plate 1, and seawater 4 is contained in the distiller water tank 3. The distiller water tank 3 is supported and fixed by the support structure 6. The bottom of the support structure 6 is placed on the ground. The support structure 6 is a hollow tubular member, which can not only play a supporting role, but also serve as a drainage and water replenishment channel for the distiller water tank 3, saving costs. The support structure 6 is connected to the cylindrical light-transmitting cover plate 1 through the rotating bearing 5. A plurality of wind blades 2 are provided at both the upper and lower ends of the cylindrical light-transmitting cover plate 1. A fresh water collection port 7 is provided at the bottom of the cylindrical light-transmitting cover plate 1. The fresh water 8 is located at the bottom of the cylindrical light-transmitting cover plate 1.

[0026] The shape of the cylindrical light-transmitting cover plate 1 is cylindrical, so that droplets can be smoothly carried away from the upper part of the cylindrical light-transmitting cover plate 1 and collected at the lower part of the cylindrical light-transmitting cover plate 1. The material of the cylindrical light-transmitting cover plate 1 can be ultra-white glass, which has ultra-high light transmittance and can reduce the refraction and reflection of sunlight during transmission, enabling the seawater inside the device to obtain solar radiation energy to the greatest extent. In addition, the material of the cylindrical light-transmitting cover plate 1 can also be set as a colorless transparent acrylic plate, which has good mechanical strength and strong plasticity, and can better meet the requirements under different working conditions.

[0027] The function of the wind blade 2 is to convert the external wind energy into the rotational mechanical energy of the cylindrical light-transmitting cover plate 1. The wind blade 2 can be provided at both the upper and lower ends of the cylindrical light-transmitting cover plate 1, with three arranged at each end, and the angle between adjacent wind blades is 120°. In order to adapt to the requirements under various working conditions, the number of wind blades can also be increased or decreased.

[0028] In order to receive solar radiation energy to the greatest extent, the bottom surface of the distiller water tank 3 is coated with a black coating. When the internal seawater is heated and evaporated into hot steam, it releases the latent heat of condensation when it encounters the relatively cold cylindrical light-transmitting cover plate 1 above and becomes droplets, and then is carried to the bottom of the cylindrical light-transmitting cover plate 1 under the action of the rotational force.

[0029] The rotating bearing 5 is arranged on the side surface of the cylindrical light-transmitting cover plate 1. The rotating ring of the rotating bearing 5 is fixed in the side groove of the cylindrical light-transmitting cover plate 1. The rotating ring rotates together with the cylindrical light-transmitting cover plate 1. The horizontal part of the supporting structure 6 is fixed to the stationary ring of the rotating bearing 5, and neither the stationary ring nor the supporting structure 6 rotates. In this way, the cylindrical light-transmitting cover plate 1 can rotate while the supporting structure 6 and the distiller water tank 3 do not rotate. The cylindrical light-transmitting cover plate 1 rotates under the action of the wind blades, strengthening the convection of the air inside the device, reducing the temperature, vapor pressure and relative humidity of the evaporation surface. At the same time, it can take away the evaporated water vapor, keeping the evaporation surface in a dry state, accelerating the evaporation of the surface moisture, and ultimately improving the efficiency of the whole system. Since a relatively high temperature needs to be maintained inside the whole system, a sealing device 9 needs to be arranged at the connection of the rotating bearing 5 to prevent the leakage of internal water vapor and maintain the internal temperature. The sealing device 9 can be set as a bearing sealing ring, and two circular protrusions extend upward on one end surface of its circular ring shape. The inner diameter of the protrusion with a smaller diameter matches the outer diameter of the stationary ring of the rotating bearing 5, and the outer diameter of the protrusion with a larger diameter matches the outer diameter of the rotating ring of the rotating bearing 5; the inner aperture diameter of the bearing sealing ring is not less than the inner aperture diameter of the stationary ring of the rotating bearing 5. A layer of sealant can be applied outside the bearing sealing ring to enhance the airtightness and prevent the leakage of internal steam to the greatest extent.

[0030] The fresh water 8 is always located at the bottom of the cylindrical light-transmitting cover plate 1. When the cylindrical light-transmitting cover plate 1 rotates, the fresh water 8 will sweep the droplets on the upper part of the cylindrical light-transmitting cover plate 1 and take them away, keeping the upper part of the whole device in a relatively dry environment and effectively avoiding the light-blocking effect. When the fresh water 8 accumulates to a certain extent, it can be discharged through the fresh water collection port 7. At the same time, when the seawater in the distiller water tank 3 is insufficient, the supporting structure 6 can provide seawater for the whole device.

[0031] The whole device can be reasonably arranged according to the actual situation of the local area. At the same time, in order to obtain more fresh water, multiple devices can be arranged. The arrangement mode of the devices can be in a linear pattern or in a cross pattern, etc.

[0032] Embodiment 2

[0033] The second embodiment of the present application provides a working method for a rotary solar seawater desalination device, including the following steps:

[0034] S1. The cylindrical light-transmitting cover plate 1 rotates under the action of the wind blades;

[0035] S2. The seawater in the distiller water tank 3 is heated and evaporated into water vapor, which turns into droplets when it meets the relatively cold cylindrical light-transmitting cover plate 1 above, and then is brought to the bottom of the cylindrical light-transmitting cover plate 1 under the action of the rotating force;

[0036] S3. When the cylindrical light-transmitting cover plate 1 rotates, the fresh water 8 at the bottom of the cylindrical light-transmitting cover plate 1 will sweep across the droplets on the upper part of the cylindrical light-transmitting cover plate 1 and carry them away;

[0037] S4. When the fresh water 8 accumulates to a certain extent, it is discharged through the fresh water collection port 7; when the seawater in the distiller water tank 3 is insufficient or the concentrated water needs to be discharged, the support structure 6 provides seawater for the distiller water tank 3 or discharges the concentrated water.

Claims

1. A rotary solar seawater desalination device, characterized in that: It includes a cylindrical light-transmitting cover plate (1), a wind blade (2), a distiller water tank (3), seawater (4), a rotating bearing (5), a support structure (6), a fresh water collection port (7) and fresh water (8); a distiller water tank (3) is arranged in the middle of the cylindrical light-transmitting cover plate (1), and seawater (4) is contained in the distiller water tank (3); the distiller water tank (3) is supported and fixed by the support structure (6), and the support structure (6) is a hollow tubular member; the support structure (6) is connected to the cylindrical light-transmitting cover plate (1) through the rotating bearing (5); several wind blades (2) are arranged at both the upper and lower ends of the cylindrical light-transmitting cover plate (1); a fresh water collection port (7) is arranged at the bottom of the cylindrical light-transmitting cover plate (1); fresh water (8) is located at the bottom of the cylindrical light-transmitting cover plate (1); the working method of the rotary solar seawater desalination device includes the following steps: S1. The cylindrical light-transmitting cover plate (1) rotates under the action of the wind blade. S2. The seawater in the distiller water tank (3) is heated and evaporated into water vapor, and when it encounters the relatively cold cylindrical light-transmitting cover plate (1) above, it becomes liquid droplets, and then is brought to the bottom of the cylindrical light-transmitting cover plate (1) under the action of the rotating force. S3. When the cylindrical light-transmitting cover plate (1) rotates, the fresh water (8) at the bottom of the cylindrical light-transmitting cover plate (1) will sweep across the liquid droplets on the upper part of the cylindrical light-transmitting cover plate (1) and take them away. S4. When the fresh water (8) accumulates to a certain extent, it is discharged through the fresh water collection port (7); when the seawater in the distiller water tank (3) is insufficient or the concentrated water needs to be discharged, seawater is provided for the distiller water tank (3) or the concentrated water is discharged through the support structure (6).

2. The rotary solar seawater desalination device according to claim 1, characterized in that: The material of the cylindrical light-transmitting cover plate (1) is ultra-white glass or colorless transparent acrylic plate.

3. The rotary solar seawater desalination device according to claim 1, characterized in that: The wind blades (2) are evenly arranged at both the upper and lower ends of the cylindrical light-transmitting cover plate (1).

4. The rotary solar seawater desalination device according to claim 1, characterized in that: The bottom surface of the distiller water tank (3) is coated with a black coating.

5. The rotary solar seawater desalination device according to claim 1, characterized in that: The rotating bearing (5) is arranged on the side surface of the cylindrical light-transmitting cover plate (1), the rotating ring of the rotating bearing (5) is fixed in the side groove of the cylindrical light-transmitting cover plate (1), and the stationary ring of the rotating bearing (5) is fixed to the horizontal part of the support structure (6).

6. The rotary solar seawater desalination device according to claim 1, characterized in that: A sealing device (9) is arranged at the connection of the rotating bearing (5), and the sealing device (9) is a bearing sealing ring, and two circular protrusions extend upward on one circular end surface thereof. The inner diameter of the protrusion with a smaller diameter is matched with the outer diameter of the stationary ring of the rotating bearing (5), and the protrusion with a larger diameter is matched with the outer diameter of the rotating ring of the rotating bearing (5); a layer of sealant is applied to the outside of the bearing sealing ring.

7. The rotary solar seawater desalination device according to claim 1, Characterized in that: The arrangement of the seawater desalination devices is in a linear pattern or a cross pattern.

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