Wind-solar complementary zero-carbon seawater desalination device

Abstract

The invention provides a wind-solar complementary zero-carbon seawater desalination device. The device comprises a solar module, a wind turbine generator, an energy storage electric box, a heat storage water tank, a refrigerating circuit and a seawater desalination tank, the solar assembly is used for providing heat energy for the heat storage water tank. The solar assembly and the wind turbine generator set are used for providing electric energy for the energy storage electric box. The refrigerating circuit is used for freezing seawater in the seawater desalination box by utilizing electric energy in the energy storage electric box; the heat storage water tank is connected with the seawater desalination tank through a heat supply pipeline, and the heat supply pipeline conveys heat energy in the heat storage water tank to the seawater desalination tank to melt frozen seawater in the seawater desalination tank; cold energy and heat energy are obtained by converting solar energy and wind energy, and the long-term cost advantage is achieved; and heat energy in the energy storage water tank and cold energy in the refrigerating circuit can be quickly started and stably run, so that the operation flexibility is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of seawater desalination, and particularly relates to a wind-solar complementary zero-carbon seawater desalination device. Background Art

[0002] Seawater desalination is to remove salts and other impurities in seawater through technical means and convert it into fresh water for human use. With the increasing shortage of global fresh water resources, seawater desalination has become one of the important ways to solve the water resource problem.

[0003] Seawater desalination technologies mainly include distillation method, reverse osmosis method, electrodialysis method, freezing method, etc. The freezing method for seawater desalination has been favored by the industrial community because its energy consumption is lower than other methods. The principle of the freezing method is that salt and water separation occurs during the natural freezing process of seawater. A large amount of salt is discharged from the ice body, resulting in the salt content of sea ice being much lower than that of seawater. After multiple cycles, the goal of seawater desalination is achieved.

[0004] The freezing method consumes a large amount of cold energy and heat energy during the treatment process. Currently, cold energy and heat energy are mainly converted from energy sources such as electric energy and chemical energy through equipment to complete seawater desalination. The proportion of energy costs has always been relatively large, resulting in a high operating cost of the equipment. In addition, the existing related equipment takes a long time to start up and reach a stable operation, and also requires time to recover after shutdown, which reduces the operating flexibility.

[0005] Therefore, it is necessary to design a wind-solar complementary zero-carbon seawater desalination device that reduces energy costs and improves operating flexibility to solve the current technical problems. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides a wind-solar complementary zero-carbon seawater desalination device that reduces energy costs and improves operating flexibility.

[0007] The technical solution of the present invention is: a wind-solar complementary zero-carbon seawater desalination device, including a solar energy component, a wind turbine generator set, an energy storage electric box, a hot water storage tank, a refrigeration circuit, and a seawater desalination tank; the solar energy component is used to provide heat energy to the hot water storage tank, and the solar energy component and the wind turbine generator set are used to provide electric energy to the energy storage electric box; the refrigeration circuit uses the electric energy in the energy storage electric box to freeze the seawater in the seawater desalination tank; the hot water storage tank is connected to the seawater desalination tank through a heat supply pipeline, and the heat supply pipeline transports the heat energy in the hot water storage tank to the seawater desalination tank to melt the frozen seawater inside it.

[0008] Further, a refrigeration coil is connected in the refrigeration circuit, and a heating coil is connected in the heat supply pipeline. Both the heating coil and the refrigeration coil are arranged inside the seawater desalination tank.

[0009] Further, the seawater desalination tank has a heat-insulating box body, and a heat exchange component, a first pipe joint and a second pipe joint are evenly arranged inside the heat-insulating box body, and at least one heat exchange component is connected in series between the first pipe joint and the second pipe joint.

[0010] Further, the heat exchange component has a heat exchange pipe, a partition is arranged inside the heat exchange pipe, the partition divides the inside of the heat exchange pipe into a refrigerating pipe cavity and a heating pipe cavity, and heat dissipation plates which are of an integral structure with the heat exchange pipe are evenly arranged on the outer side of the heat exchange pipe.

[0011] Further, first flow guiding members and second flow guiding members are evenly and alternately arranged inside the refrigerating pipe cavity and the heating pipe cavity; the first flow guiding member is in an inverted "eight" character structure, a central liquid outlet is arranged in the middle of the first flow guiding member, and two ends of the first flow guiding member are respectively connected with two sides inside the heat exchange pipe into an integral structure; the second flow guiding member is in a "V" character structure, and side liquid outlets are arranged between two ends of the second flow guiding member and two sides inside the heat exchange pipe.

[0012] Further, two refrigerating pipe cavities and two heating pipe cavities in adjacent heat exchange components are respectively communicated through elbow joints.

[0013] Further, the refrigeration circuit has an expansion valve, a condenser and a compressor which are connected in series with the refrigeration coil into a circuit, and the compressor is powered by the energy storage electric box and adopts a frequency conversion control mode.

[0014] Further, a heat storage coil is arranged inside the hot water storage tank, a light heat storage pipeline is connected to the solar energy component, the light heat storage pipeline and the heat storage coil are connected into a circuit, and a heat storage pump is arranged on the light heat storage pipeline.

[0015] Further, a heat supply pump is arranged on the heat supply pipeline.

[0016] Further, a drain pipe communicated with the inside of the seawater desalination tank is arranged at the bottom of the seawater desalination tank, and a drain valve is arranged on the drain pipe.

[0017] Advantages of the present invention:

[0018] (1) In the present invention, seawater to be desalinated is injected into the inside of the seawater desalination tank, the energy storage electric box supplies power to the refrigeration circuit, the seawater inside the seawater desalination tank is frozen through the refrigeration circuit, salt and water separation occurs, a large amount of salt is discharged from the ice body, the uncondensed part of the high-concentration seawater inside the seawater desalination tank is discharged, and then the heat energy in the hot water storage tank is transported to the seawater desalination tank through the heat supply pipeline to melt the frozen seawater inside it, and then the above processes of freezing, discharging and melting are repeated multiple times, the seawater concentration is gradually reduced, and finally it becomes desalinated water;

[0019] (2) The energy storage electric box is powered by the photovoltaic power generation of the solar components and the wind power generation of the wind turbine. The energy storage electric box supplies electrical energy to the refrigeration circuit, and the electrical energy is converted into the cold energy for freezing seawater through the refrigeration circuit. The solar components provide heat energy for the energy storage water tank through photothermal energy. The heat energy stored in the energy storage water tank is used to melt the frozen seawater inside the seawater desalination tank. Both the cold energy and the heat energy are obtained through the conversion of solar energy and wind energy, having a long-term cost advantage;

[0020] (3) The heat energy in the energy storage water tank and the cold energy in the refrigeration circuit can be quickly started and stably operated, improving the flexibility of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the wind-solar complementary zero-carbon seawater desalination device in the present invention.

[0022] Figure 2 It is a schematic structural diagram of an embodiment of the seawater desalination tank in the present invention.

[0023] Figure 3 It is one of the schematic structural diagrams of the heat exchange component in the present invention.

[0024] Figure 4 It is the second of the schematic structural diagrams of the heat exchange component in the present invention.

[0025] Figure 5 is Figure 5 the sectional view at A-A in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully convey the scope of the present invention to those skilled in the art. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions and values set forth in these embodiments should be construed as merely exemplary and not as limitations.

[0027] The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different parts. Terms such as "including" or "comprising" mean that the elements before this word cover the elements listed after this word, and do not exclude the possibility of also covering other elements. "Up", "down", "left", "right", etc. are only used to represent the relative positional relationship. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] As shown Figure 1 , the wind-solar complementary zero-carbon seawater desalination device includes a solar energy component 1, a wind turbine 6, an energy storage electric box 3, a hot water storage tank 2, a refrigeration circuit 4 and a seawater desalination tank 5; the solar energy component 1 is used to provide heat energy to the hot water storage tank 2, and the solar energy component 1 and the wind turbine 6 are used to provide electric energy to the energy storage electric box 3; the refrigeration circuit 4 uses the electric energy in the energy storage electric box 3 to freeze the seawater in the seawater desalination tank 5; the hot water storage tank 2 is connected to the seawater desalination tank 5 through a heat supply pipeline 22, and the heat supply pipeline 22 transports the heat energy in the hot water storage tank 2 to the seawater desalination tank 5 to melt the frozen seawater inside it; in this embodiment, the seawater to be desalinated is injected into the interior of the seawater desalination tank 5, the energy storage electric box 3 supplies power to the refrigeration circuit 4, the seawater in the interior of the seawater desalination tank 5 is frozen through the refrigeration circuit 4, resulting in salt-water separation, a large amount of salt is discharged from the ice body, the high-concentration seawater in the unfrozen part inside the seawater desalination tank 5 is discharged, and then the heat energy in the hot water storage tank 2 is transported to the seawater desalination tank 5 through the heat supply pipeline 22 to melt the frozen seawater inside it, and then the above processes of freezing, discharging, and melting are repeated multiple times, the seawater concentration gradually decreases, and finally becomes desalinated water; the energy storage electric box 3 obtains electric energy through the photovoltaic power generation of the solar energy component 1 and the wind power generation of the wind turbine 6, the energy storage electric box 3 supplies electric energy to the refrigeration circuit 4, and the electric energy is converted into the cold energy for freezing seawater through the refrigeration circuit 4, the solar energy component 1 provides heat energy to the energy storage water tank 2 through photothermal energy, and the heat energy stored in the energy storage water tank 2 is used to melt the frozen seawater inside the seawater desalination tank 5. Both the cold energy and the heat energy are obtained through the conversion of solar energy and wind energy, having a long-term cost advantage; the heat energy in the energy storage water tank 2 and the cold energy in the refrigeration circuit 4 can be quickly started and stably operated, improving the flexibility of operation.

[0029] In some embodiments, as an alternative implementation manner of the seawater desalination tank 5, a refrigeration coil 44 is connected in the refrigeration circuit 4, and a heating coil 24 is connected in the heat supply pipeline 22. Both the heating coil 24 and the refrigeration coil 44 are arranged inside the seawater desalination tank 5; the arrangement of the heating coil 24 and the refrigeration coil 44 can increase the heat exchange area with the seawater inside the seawater desalination tank 5 and improve the heat exchange efficiency.

[0030] In some embodiments, as another alternative implementation manner of the seawater desalination tank 5, as Figures 2 to 5As shown, the seawater desalination tank 5 has a heat-insulating box body 53. Inside the heat-insulating box body 53, a heat exchange assembly 54, a first pipe joint 55, and a second pipe joint 56 are evenly arranged. At least one heat exchange assembly 54 is connected in series between the first pipe joint 55 and the second pipe joint 56; two channels are arranged inside the heat exchange assembly 54, the first pipe joint 55, and the second pipe joint 56; one of the channels is connected to the refrigeration circuit 4 and is used to provide cold energy to the inside of the heat-insulating box body 53 to freeze seawater; the other channel is connected to the heat supply pipeline 22 and is used to provide heat energy to the inside of the heat-insulating box body 53 to melt the frozen seawater.

[0031] In some embodiments, the heat exchange assembly 54 has a heat exchange pipe 541. Inside the heat exchange pipe 541, a partition plate 542 is arranged. The partition plate 542 divides the inside of the heat exchange pipe 541 into a refrigeration pipe cavity 543 and a heating pipe cavity 544. On the outside of the heat exchange pipe 541, heat dissipation plates 545 which are of an integral structure with it are evenly arranged; the refrigeration pipe cavities 543 inside the heat exchange pipes 541 of multiple heat exchange assemblies 54 are communicated with each other, and the first pipe joint 55 and the second pipe joint 56 are respectively arranged at both ends thereof and are connected to the refrigeration circuit 4 through the first pipe joint 55 and the second pipe joint 56; the heating pipe cavities 544 inside the heat exchange pipes 541 of multiple heat exchange assemblies 54 are communicated with each other, and the first pipe joint 55 and the second pipe joint 56 are respectively arranged at both ends thereof and are connected to the heat supply pipeline 22 through the first pipe joint 55 and the second pipe joint 56; the heat dissipation plates 545 can increase the contact area between the heat exchange pipe 541 and seawater and improve the heat exchange efficiency between the heat exchange pipe 541 and seawater.

[0032] In some embodiments, first flow guiding members 546 and second flow guiding members 547 are evenly and alternately arranged inside the refrigeration pipe cavity 543 and the heating pipe cavity 544; the first flow guiding member 546 has an inverted "eight" - shaped structure, a central liquid outlet 5461 is opened in the middle of the first flow guiding member 546, and both ends of the first flow guiding member 546 are integrally connected to both sides inside the heat exchange pipe 541; the second flow guiding member 547 has a "V" - shaped structure, and side liquid outlets 5471 are arranged between both ends of the second flow guiding member 547 and both sides inside the heat exchange pipe 541; when the media in the refrigeration circuit 4 and the heat supply pipeline 22 flow inside the refrigeration pipe cavity 543 and the heating pipe cavity 544, they fully contact both sides of the first flow guiding member 546 and the second flow guiding member 547, increasing the heat exchange area and improving the heat exchange efficiency between the media and the heat exchange pipe 541.

[0033] In some embodiments, as a specific connection method between the heat exchange assemblies 54, the two refrigeration pipe cavities 543 and the two heating pipe cavities 544 between adjacent heat exchange assemblies 54 are respectively communicated through elbow joints 57.

[0034] In some embodiments, the refrigeration circuit 4 has an expansion valve 43, a condenser 42, and a compressor 41 that are connected in series in sequence to form a circuit with the refrigeration coil 44. The compressor 41 is powered by the energy storage electrical box 3 and adopts a variable frequency control method, which can adjust the operating state of the compressor 41 to meet different refrigeration requirements. In other embodiments, the refrigeration circuit 4 has an expansion valve 43, a condenser 42, and a compressor 41 that are connected in series in sequence to form a circuit with the refrigeration pipe cavity 543.

[0035] In some embodiments, a heat storage coil 21 is arranged inside the heat storage water tank 2. The heat storage coil 21 is used to increase the contact area between the stored water inside the heat storage water tank 2 and the solar heat storage pipeline 11, so as to increase the heat exchange efficiency. The solar energy component 1 is connected with the solar heat storage pipeline 11, and the solar heat storage pipeline 11 and the heat storage coil 21 are connected to form a circuit. A heat storage pump 12 is arranged on the solar heat storage pipeline 11. The heat storage pump 12 drives the medium in the solar energy component 1 and the heat storage water tank 2 to circulate, and transfers the heat in the solar energy component 1 to the stored water in the heat storage water tank 2.

[0036] In some embodiments, a heating pump 23 is arranged on the heating pipeline 22. Through the heating pump 23, the stored water in the heat storage water tank 2 can be circulated and pumped into the heating coil 24 or the heat exchange pipe 541 to melt the frozen seawater.

[0037] In some embodiments, a drain pipe 51 communicating with the inside thereof is arranged at the bottom of the seawater desalination tank 5. A drain valve 52 is arranged on the drain pipe 51. After the seawater inside the seawater desalination tank 5 freezes, opening the drain valve 52 can discharge the high-concentration seawater in the unfrozen part inside the seawater desalination tank 5.

[0038] So far, the embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed here based on the above description.

[0039] The above-described embodiments only represent some implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A wind-solar complementary zero-carbon seawater desalination device, characterized by: Including solar panels, wind turbines, energy storage boxes, hot water storage tanks, refrigeration circuits and desalination tanks; The solar energy module is used to provide thermal energy to the hot water storage tank, and the solar energy module and the wind turbine generator set are used to provide electrical energy to the energy storage box; The refrigeration circuit utilizes the electric energy in the energy storage box to freeze the seawater in the seawater desalination tank; The hot water storage tank is connected to the seawater desalination tank through a heating pipeline, and the heating pipeline transmits heat energy in the hot water storage tank to the seawater desalination tank to melt the frozen seawater inside the seawater desalination tank.

2. The wind-solar hybrid zero-carbon seawater desalination device according to claim 1 is characterized by: A refrigeration coil is connected to the refrigeration circuit, a heating coil is connected to the heating pipeline, and both the heating coil and the refrigeration coil are arranged inside the seawater desalination tank.

3. The wind-solar hybrid zero-carbon seawater desalination device according to claim 1 is characterized in that: The seawater desalination tank has a heat-insulating box body, and heat exchange components, a first pipe joint and a second pipe joint are evenly arranged inside the heat-insulating box body. At least one heat exchange component is connected in series between the first pipe joint and the second pipe joint.

4. The wind-solar hybrid zero-carbon seawater desalination device according to claim 3 is characterized by: The heat exchange assembly has a heat exchange tube, a partition is arranged inside the heat exchange tube, and the partition separates the inside of the heat exchange tube into a cooling tube cavity and a heating tube cavity. The outer side of the heat exchange tube is evenly provided with a heat dissipation plate which is an integral structure with the heat exchange tube.

5. The wind-solar hybrid zero-carbon seawater desalination device according to claim 4 is characterized by: The first flow guide and the second flow guide are evenly and alternately arranged inside the refrigeration tube cavity and the heating tube cavity; the first flow guide is in an inverted "eight" shape, a central liquid outlet is opened in the middle of the first flow guide, and the two ends of the first flow guide are respectively connected to the two sides of the interior of the heat exchange tube to form an integrated structure; the second flow guide is in a "V" shape, and side liquid outlets are arranged between the two ends of the second flow guide and the two sides of the interior of the heat exchange tube.

6. The wind-solar hybrid zero-carbon seawater desalination device according to claim 4 is characterized by: The two refrigeration tube cavities and the two heating tube cavities in adjacent heat exchange components are respectively connected through elbow joints.

7. The wind-solar hybrid zero-carbon seawater desalination device according to claim 2 is characterized by: The refrigeration circuit comprises an expansion valve, a condenser and a compressor which are connected in series with the refrigeration coil to form a circuit. The compressor is powered by the energy storage box and adopts a variable frequency control method.

8. The wind-solar hybrid zero-carbon seawater desalination device according to claim 1 is characterized by: A heat storage coil is arranged inside the heat storage water tank, a light heat storage pipeline is connected to the solar module, the light heat storage pipeline and the heat storage coil are connected to form a loop, and a heat storage pump is arranged on the light heat storage pipeline.

9. The wind-solar hybrid zero-carbon seawater desalination device according to claim 1, characterized in that: A heat pump is arranged on the heat supply pipeline.

10. The wind-solar hybrid zero-carbon seawater desalination device according to claim 1, characterized in that: A drainage pipe connected to the interior of the seawater desalination tank is arranged at the bottom of the seawater desalination tank, and a drainage valve is arranged on the drainage pipe.

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