Solar-driven seawater vacuum desalination device

Abstract

The utility model relates to the technical field of solar energy utilization and seawater desalination, and provides a solar-driven seawater vacuum desalination device which comprises a solar heat collection device and a vacuum seawater evaporation device, the solar heat collection device comprises a solar water heater which is communicated with the first heat exchanger; the vacuum seawater evaporation device comprises a vacuum seawater evaporator, a partition plate is arranged in the vacuum seawater evaporator and divides an inner cavity of the vacuum seawater evaporator into an evaporation cavity and a condensation cavity, the first heat exchanger is arranged in the evaporation cavity, the top of the evaporation cavity communicates with a seawater input pipeline, and the bottom of the evaporation cavity communicates with a high-concentration seawater output pipeline. A second heat exchanger is arranged in the condensation cavity and communicates with a cooling water circulating pipeline, and the bottom of the condensation cavity further communicates with a fresh water output pipeline; a separation assembly is arranged between the evaporation cavity and the condensation cavity. The seawater desalination device is high in seawater desalination efficiency, can realize separation of evaporated water vapor and seawater water drops, and improves the quality of desalted water.

Description

Technical Field

[0001] The utility model relates to the technical field of solar energy utilization and seawater desalination, in particular to a solar energy driven seawater vacuum desalination device. Background Art

[0002] Fresh water is one of the basic substances for the survival and development of human society. China is relatively short of water resources. Some islands and coastal saline-alkali areas as well as inland brackish water areas in our country are areas lacking fresh water. People in these areas have developed various diseases due to long-term drinking of water that does not meet hygiene standards, which directly affects their physical health and local economic development. Therefore, solving the shortage of fresh water supply is a serious problem facing our country.

[0003] In order to increase the supply of fresh water, the measures usually adopted are to divert water nearby or across river basins. For areas where seawater or brackish water exists nearby, desalination treatment is usually carried out. There are many ways to desalinate seawater or brackish water. The commonly used methods are: distillation, ion exchange, dialysis, reverse osmosis membrane and freezing, etc. However, the above methods consume a lot of fuel or electricity, which is not conducive to the sustainable development of society. Therefore, using clean energy such as solar energy to produce fresh water from seawater or brackish water is one of the important ways to solve the lack or insufficient supply of fresh water.

[0004] There are many solar desalination devices at present, for example, patent number CN92213434.0, patent name is solar desalination device Chinese utility model patent, the main part of the device is composed of a parabolic mirror, a heater with a pipe, a group of heat exchangers and some pipes, valves and other components. When the symmetry axis of the parabolic mirror is adjusted to be in line with the sun, the water contained in the heater is heated and boils to produce water vapor, and the water vapor flows through the heat exchanger and condenses to produce fresh water. The energy released by the condensation is transmitted to the seawater in another channel of the heat exchanger. The seawater is preheated and then added to the heater, so that the whole device is connected to produce fresh water. Although the above device can realize the desalination of seawater, the desalination efficiency is low, and the evaporated water vapor is mixed with the seawater droplets, and it cannot be effectively classified, which reduces the quality of the desalinated water. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a solar-driven seawater vacuum desalination device, which has high seawater desalination efficiency and can separate evaporated water vapor from seawater droplets, thereby improving the quality of desalinated water.

[0006] In order to solve the above technical problems, the technical solution of the utility model is:

[0007] A solar-driven seawater vacuum desalination device, comprising a solar heat collection device and a vacuum seawater evaporation device;

[0008] The solar heat collection device comprises a solar water heater, and the solar water heater is connected to a first heat exchanger;

[0009] The vacuum seawater evaporation device comprises a vacuum seawater evaporator, a partition is arranged in the vacuum seawater evaporator, the partition divides the inner cavity of the vacuum seawater evaporator into an evaporation cavity and a condensation cavity, the first heat exchanger is arranged in the evaporation cavity, the top of the evaporation cavity is connected to a seawater input pipeline, the bottom of the evaporation cavity is connected to a high-concentration seawater output pipeline, the second heat exchanger is arranged in the condensation cavity, the second heat exchanger is connected to a cooling water circulation pipeline, and the bottom of the condensation cavity is also connected to a fresh water output pipeline;

[0010] A separation component is also provided between the evaporation chamber and the condensation chamber, and the separation component is installed between the partition and the top inner wall of the vacuum seawater evaporator.

[0011] As an improved technical solution, the separation assembly includes a connecting frame, which is respectively connected to the partition and the inner wall of the vacuum seawater evaporator. A plurality of corrugated plates are arranged on the connecting frame. The plurality of corrugated plates are all inclined, and the lowest end of the inclination direction faces the evaporation chamber.

[0012] As an improved technical solution, a hot water input pipe is provided between the output end of the solar water heater and the input end of the first heat exchanger, a hot water circulation pump is installed on the hot water input pipe, and a hot water return pipe is provided between the output end of the first heat exchanger and the input end of the solar water heater.

[0013] As an improved technical solution, a first water level detector, a second water level detector and a third water level detector are installed on the inner wall of the evaporation chamber, the height of the first water level detector is greater than the height of the second water level detector, the height of the second water level detector is greater than the height of the third water level detector, and a fourth water level detector is installed on the inner wall of the condensation chamber.

[0014] As an improved technical solution, a seawater shielded pump is installed on the seawater input pipeline, a high-concentration seawater shielded pump is installed on the high-concentration seawater output pipeline, a cooling water pump is installed on the cooling water circulation pipeline, and a fresh water shielded pump is installed on the fresh water output pipeline.

[0015] As an improved technical solution, a vacuum degree detection gauge is also installed on the vacuum seawater evaporator, the top of the vacuum seawater evaporator is connected to a vacuum pump through a vacuum pipeline, and the vacuum degree detection gauge and the vacuum pump are both electrically connected to a PLC controller;

[0016] The first water level detector, the second water level detector, the third water level detector and the fourth water level detector are also electrically connected to the PLC controller;

[0017] The seawater shielded pump, the high-concentration seawater shielded pump and the fresh water shielded pump are also electrically connected to the PLC controller.

[0018] As an improved technical solution, the first heat exchanger and the second heat exchanger both include an input pipe and an output pipe, a plurality of heat exchange pipes are connected between the input pipe and the output pipe, and the plurality of heat exchange pipes are all arranged in an S-shaped structure.

[0019] After adopting the above technical solution, the beneficial effects of the utility model are:

[0020] By setting a solar thermal collector, the solar thermal collector includes a solar water heater, the solar water heater is connected to a first heat exchanger, the vacuum seawater evaporation device includes a vacuum seawater evaporator, a partition is arranged in the vacuum seawater evaporator, the partition separates the inner cavity of the vacuum seawater evaporator into an evaporation cavity and a condensation cavity, the first heat exchanger is arranged in the evaporation cavity, the top of the evaporation cavity is connected to a seawater input pipeline, the bottom of the evaporation cavity is connected to a high-concentration seawater output pipeline, the second heat exchanger is arranged in the condensation cavity, the second heat exchanger is connected to a cooling water circulation pipeline, the bottom of the condensation cavity is also connected to a fresh water output pipeline, a separation component is also arranged between the evaporation cavity and the condensation cavity, the separation component is installed between the partition and the top inner wall of the vacuum seawater evaporator, and the solar water heater can absorb solar energy. The medium in the solar water heater is heated, and the heated medium is transported to the first heat exchanger. The seawater in the evaporation chamber can be heated and evaporated by the first heat exchanger. The evaporated water vapor and seawater droplets can be separated by the separation component, so that the seawater droplets fall back into the evaporation chamber, and the water vapor enters the condensation chamber, thereby improving the quality of desalinated water. The water vapor can be condensed into water droplets by the second heat exchanger, and accumulated at the bottom of the condensation chamber, and output through the fresh water output pipeline, thereby realizing the desalination of seawater. At the same time, since the vacuum seawater evaporator is a vacuum environment and the boiling point of seawater is low, the seawater can be evaporated into water vapor at a lower temperature in the vacuum seawater evaporator, thereby improving the heat exchange efficiency of the vacuum seawater evaporator, thereby improving the desalination efficiency of seawater;

[0021] The separation component includes a connecting frame, on which a plurality of corrugated plates are arranged, and the plurality of corrugated plates are all arranged in an inclined manner, and the lowest end of the inclined direction faces the evaporation chamber. The corrugated plates are arranged to hinder the water vapor and seawater droplets evaporated from the evaporation chamber, so that the seawater droplets with heavier weight are blocked on the corrugated plates, and in the process of accumulation, they slide back to the evaporation chamber along the corrugated plates, thereby achieving separation of water vapor and seawater droplets;

[0022] By installing a first water level detector, a second water level detector and a third water level detector on the inner wall of the evaporation chamber, the height of the first water level detector is greater than that of the second water level detector, and the height of the second water level detector is greater than that of the third water level detector. The first water level detector can detect the upper limit of seawater when it is injected into the evaporation chamber, and the second water level detector can detect the height of the seawater concentrated into high-concentration seawater after evaporation. At this time, it can be discharged through the high-concentration seawater output pipeline. The third water level detector can detect the lower limit of the seawater in the evaporation chamber. At this time, the high-concentration seawater output pipeline is closed, and the discharge to the outside is stopped, and seawater is re-injected from the seawater input pipeline. By installing a fourth water level detector on the inner wall of the condensation chamber, the fourth water level detector can detect the upper limit of the desalinated water in the condensation chamber. When the desalinated water reaches a certain height, it can be output through the fresh water output pipeline;

[0023] The first heat exchanger and the second heat exchanger both include an input pipe and an output pipe. A plurality of heat exchange pipes are connected between the input pipe and the output pipe. The plurality of heat exchange pipes are all arranged in an S-shaped structure. By arranging the heat exchange pipes in an S-shaped structure, the heat exchange efficiency is improved.

[0024] In summary, the utility model provides a solar-driven seawater vacuum desalination device, which has high seawater desalination efficiency and can separate evaporated water vapor from seawater droplets, thereby improving the quality of desalinated water. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In addition, in the drawings, the components or parts are not necessarily drawn according to the actual scale.

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the vacuum seawater evaporator in the utility model;

[0028] Figure 3 It is a cross-sectional structural schematic diagram of the separation component in the utility model;

[0029] Figure 4 It is a structural schematic diagram of the first heat exchanger in the utility model;

[0030] Reference numerals:

[0031] 1. Solar water heater, 2. First heat exchanger, 201. Input pipe, 202. Output pipe, 203. Heat exchange pipe, 3. Vacuum seawater evaporator, 4. Baffle, 5. Evaporation chamber, 6. Condensation chamber, 7. Seawater input pipeline, 8. High-concentration seawater output pipeline, 9. Second heat exchanger, 10. Cooling water circulation pipeline, 11. Fresh water output pipeline, 12. Separation component, 1201. Connecting frame, 1202. Corrugated plate, 13. Hot water input pipeline, 14. Hot water circulation pump, 15. Hot water return pipeline, 16. First water level detector, 17. Second water level detector, 18. Third water level detector, 19. Fourth water level detector, 20. Seawater shielded pump, 21. High-concentration seawater shielded pump, 22. Cooling water pump, 23. Fresh water shielded pump, 24. Vacuum detection meter, 25. Vacuum pipeline, 26. Vacuum pump, 100. Solar thermal collector, 200. Vacuum seawater evaporation device. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0035] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0036] like Figure 1-Figure 4As shown, a solar-driven seawater vacuum desalination device comprises a solar heat collection device 100 and a vacuum seawater evaporation device 200;

[0037] The solar thermal collector 100 comprises a solar water heater 1, which is connected to a first heat exchanger 2;

[0038] The vacuum seawater evaporation device 200 comprises a vacuum seawater evaporator 3, a partition 4 is arranged in the vacuum seawater evaporator 3, the partition 4 divides the inner cavity of the vacuum seawater evaporator 3 into an evaporation cavity 5 and a condensation cavity 6, a first heat exchanger 2 is arranged in the evaporation cavity 5, a seawater input pipeline 7 is connected to the top of the evaporation cavity 5, a high-concentration seawater output pipeline 8 is connected to the bottom of the evaporation cavity 5, a second heat exchanger 9 is arranged in the condensation cavity 6, the second heat exchanger 9 is connected to a cooling water circulation pipeline 10, and a fresh water output pipeline 11 is also connected to the bottom of the condensation cavity 6;

[0039] A separation component 12 is also provided between the evaporation chamber 5 and the condensation chamber 6. The separation component 12 is installed between the partition 4 and the top inner wall of the vacuum seawater evaporator 3. Therefore, by providing the solar water heater 1, solar energy can be absorbed to heat the medium in the solar water heater 1, and the heated medium is transported to the first heat exchanger 2. The seawater in the evaporation chamber 5 can be heated and evaporated by the first heat exchanger 2. The evaporated water vapor and seawater droplets can be separated by the separation component 12, so that the seawater droplets fall back to the evaporation chamber 5, and the water vapor enters the condensation chamber 6, thereby improving the quality of desalinated water. The water vapor can be condensed into water droplets by the second heat exchanger 9, and accumulated at the bottom of the condensation chamber 6, and output through the fresh water output pipe 11, thereby realizing the desalination of seawater. At the same time, since the vacuum seawater evaporator 3 is a vacuum environment, the boiling point of seawater is low, so that the seawater can be evaporated into water vapor at a lower temperature in the vacuum seawater evaporator 3, thereby improving the heat exchange efficiency of the vacuum seawater evaporator 3, thereby improving the desalination efficiency of seawater.

[0040] In addition, control valves are installed on the seawater input pipe 7, the high-concentration seawater output pipe 8, the cooling water circulation pipe 10, and the fresh water output pipe 11. Control valves are common in daily life and are common knowledge to technicians in this technical field, so they will not be described here.

[0041] like Figure 1-Figure 3As shown, the separation component 12 includes a connecting frame 1201, which is connected to the partition 4 and the inner wall of the vacuum seawater evaporator 3 respectively. A plurality of corrugated plates 1202 are arranged on the connecting frame 1201. The plurality of corrugated plates 1202 are all inclined, and the lowest end of the inclined direction faces the evaporation chamber 5. A space for separating water vapor and water droplets is formed between adjacent corrugated plates 1202. The corrugated plates 1202 are provided to hinder the water vapor and seawater droplets evaporated from the evaporation chamber 5, so that the heavier seawater droplets are blocked on the corrugated plates 1202, and in the accumulation process, they slide back to the evaporation chamber 5 along the corrugated plates 1202, thereby realizing the separation of water vapor and seawater droplets.

[0042] like Figure 1 As shown, a hot water input pipe 13 is provided between the output end of the solar water heater 1 and the input end of the first heat exchanger 2, a hot water circulation pump 14 is installed on the hot water input pipe 13, and a hot water return pipe 15 is provided between the output end of the first heat exchanger 2 and the input end of the solar water heater 1, and the hot water input pipe 13, the hot water return pipe 15 and the hot water circulation pump 14 are used to realize the circulation of the medium in the solar water heater 1;

[0043] In addition, a control valve is also installed on the hot water input pipe 13.

[0044] like Figure 2 As shown, a first water level detector 16 and a second water level detector 17 are installed on the inner wall of the evaporation chamber 5, and the height of the first water level detector 16 is greater than that of the second water level detector 17. A third water level detector 18 is installed on the inner wall of the condensation chamber 6. The first water level detector 16 can detect the upper limit of the water level when the seawater is injected into the evaporation chamber 5. The second water level detector 17 can detect the height of the seawater concentrated into high-concentration seawater after evaporation. At this time, it can be discharged through the high-concentration seawater output pipeline 8. The third water level detector 18 can detect the lower limit of the water level in the evaporation chamber 5. At this time, the high-concentration seawater output pipeline 8 is closed and stops discharging outward, and the seawater is re-injected from the seawater input pipeline 7. A fourth water level detector 19 is installed on the inner wall of the condensation chamber 6. The fourth water level detector 19 can detect the upper limit of the desalinated water in the condensation chamber 6. When the desalinated water reaches a certain height, it can be output through the fresh water output pipeline 11.

[0045] In this embodiment, the storage volume of the evaporation chamber 5 of the vacuum seawater evaporator 3 is 1500mm*400mm*700mm as an example. When the seawater injection height is 700mm, it reaches the detection height of the first water level detector 16, and the seawater input pipe 7 will be closed and the input will stop. After that, the solar-driven seawater vacuum desalination device will be operated, and the seawater in the evaporation chamber 5 will evaporate. During the evaporation process, the seawater is concentrated into high-concentration seawater, and the water level evaporates to about 600mm. The specific value can be set according to local conditions. At this time, the high-concentration seawater is discharged through the high-concentration seawater output pipe 8. When the water level of the discharged high-concentration seawater drops to 500mm, the high-concentration seawater output pipe 8 is closed and the discharge is stopped. Instead, the seawater is re-injected from the seawater input pipe 7, and the above actions are repeated.

[0046] like Figure 1-Figure 2 As shown, a seawater shielded pump 20 is installed on the seawater input pipeline 7, and seawater is injected into the evaporation chamber 5 through the seawater shielded pump 20. A high-concentration seawater shielded pump 21 is installed on the high-concentration seawater output pipeline 8, and the evaporated high-concentration seawater is discharged through the high-concentration seawater shielded pump 21. A cooling water pump 22 is installed on the cooling water circulation pipeline 10, and circulating cooling water is provided through the cooling water pump 22. A fresh water shielded pump 23 is installed on the fresh water output pipeline 11, and fresh water is output through the fresh water shielded pump 23.

[0047] like Figure 1-Figure 2 As shown, a vacuum degree detection gauge 24 is also installed on the vacuum seawater evaporator 3. The top of the vacuum seawater evaporator 3 is connected to a vacuum pump 26 through a vacuum pipe 25. The vacuum degree detection gauge 24 and the vacuum pump 26 are both electrically connected to a PLC controller. The vacuum degree of the inner cavity of the vacuum seawater evaporator 3 is detected by the vacuum degree detection gauge 24, and the signal is transmitted to the PLC controller. The vacuum seawater evaporator 3 is evacuated through the vacuum pipe 25 and the vacuum pump 26. The vacuum degree detected by the vacuum degree detection gauge 24 is received by the PLC controller, and the operation of the vacuum pump 26 is controlled.

[0048] The first water level detector 16 , the second water level detector 17 , the third water level detector 18 and the fourth water level detector 19 are also electrically connected to the PLC controller, and the PLC controller can receive the water level conditions in the cavity detected by the first water level detector 16 , the second water level detector 17 , the third water level detector 18 and the fourth water level detector 19 .

[0049] The seawater shielded pump 20, the high-concentration seawater shielded pump 21 and the freshwater shielded pump 23 are also electrically connected to the PLC controller. The PLC controller controls the operation of the seawater shielded pump 20, the high-concentration seawater shielded pump 21 and the freshwater shielded pump 23 according to the water level detected by each water level detector.

[0050] like Figure 1-Figure 2 and Figure 4 As shown, the first heat exchanger 2 and the second heat exchanger 9 both include an input pipe 201 and an output pipe 202. A plurality of heat exchange pipes 203 are connected between the input pipe 201 and the output pipe 202. The plurality of heat exchange pipes 203 are all arranged in an S-shaped structure. By designing the heat exchange pipes 203 into an S-shaped structure, the heat exchange efficiency is improved.

[0051] For ease of understanding, the working process of this embodiment is given below:

[0052] like Figure 1-Figure 4 As shown, first, the seawater shielded pump 20 transports seawater to the evaporation chamber 5 of the vacuum seawater evaporator 3 through the seawater input pipe 7. When the seawater injection volume reaches the detection height of the first water level detector 16, the seawater shielded pump 20 stops running and closes the seawater input pipe 7. Then, the vacuum pump 26 runs and evacuates the inner cavity of the vacuum seawater evaporator 3. When the vacuum detection meter 24 detects that the vacuum degree of the inner cavity reaches the set value, the vacuum pump 26 stops running. Then, the hot water circulation pump 14 transports the medium heated by the solar water heater 1 to the first heat exchanger 2. The seawater in the evaporation chamber 5 is evaporated through the first heat exchanger 2. The evaporated water vapor and seawater droplets are blocked by the corrugated plate 1202 of the separation component 12. The seawater droplets drip back into the evaporation chamber 5, while the water vapor enters the condensation chamber 6. At this time, the cooling water pump 22 runs and transports the cooling water to the second heat exchanger 9 through the cooling water circulation pipe 10. The second heat exchanger 9 condenses the water vapor into water droplets and accumulates them at the bottom of the condensation chamber 6. When the water level of the accumulated fresh water reaches the set height of the fourth water level detector 19, the fresh water shielded pump 23 runs and outputs the fresh water.

[0053] During the evaporation of seawater, seawater is gradually concentrated into high-concentration seawater, and the water level gradually drops with evaporation. When the water level drops to the detection height of the second water level detector 17, the high-concentration seawater shielded pump 21 starts running and discharges the high-concentration seawater through the high-concentration seawater output pipe 8. When the discharged high-concentration seawater level drops to the detection height of the third water level detector 18, the high-concentration seawater shielded pump 21 stops running and the high-concentration seawater output pipe 8 is closed. At this time, the seawater shielded pump 20 starts running again, and the seawater is transported to the evaporation chamber 5 of the vacuum seawater evaporator 3 again through the seawater input pipe 7. The above actions are then repeated to achieve the desalination of seawater.

[0054] In summary, the utility model provides a solar-driven seawater vacuum desalination device, which has high seawater desalination efficiency and can separate evaporated water vapor from seawater droplets, thereby improving the quality of desalinated water.

[0055] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A solar-driven seawater vacuum desalination device, characterized in that: It includes a solar heat collection device and a vacuum seawater evaporation device; The solar heat collection device comprises a solar water heater, and the solar water heater is connected to a first heat exchanger; The vacuum seawater evaporation device comprises a vacuum seawater evaporator, a partition is arranged in the vacuum seawater evaporator, the partition divides the inner cavity of the vacuum seawater evaporator into an evaporation cavity and a condensation cavity, the first heat exchanger is arranged in the evaporation cavity, the top of the evaporation cavity is connected to a seawater input pipeline, the bottom of the evaporation cavity is connected to a high-concentration seawater output pipeline, the second heat exchanger is arranged in the condensation cavity, the second heat exchanger is connected to a cooling water circulation pipeline, and the bottom of the condensation cavity is also connected to a fresh water output pipeline; A separation component is also provided between the evaporation chamber and the condensation chamber, and the separation component is installed between the partition and the top inner wall of the vacuum seawater evaporator.

2. The solar-driven seawater vacuum desalination device according to claim 1, characterized in that: The separation assembly includes a connecting frame, which is respectively connected to the partition and the inner wall of the vacuum seawater evaporator. A plurality of corrugated plates are arranged on the connecting frame. The plurality of corrugated plates are all inclined, and the lowest end of the inclined direction faces the evaporation chamber.

3. The solar-driven seawater vacuum desalination device according to claim 1, characterized in that: A hot water input pipe is provided between the output end of the solar water heater and the input end of the first heat exchanger, a hot water circulation pump is installed on the hot water input pipe, and a hot water return pipe is provided between the output end of the first heat exchanger and the input end of the solar water heater.

4. The solar-driven seawater vacuum desalination device according to claim 1, characterized in that: A first water level detector, a second water level detector and a third water level detector are installed on the inner wall of the evaporation chamber, the height of the first water level detector is greater than the height of the second water level detector, the height of the second water level detector is greater than the height of the third water level detector, and a fourth water level detector is installed on the inner wall of the condensation chamber.

5. The solar-driven seawater vacuum desalination device according to claim 4, characterized in that: The seawater input pipeline is equipped with a seawater shielded pump, the high-concentration seawater output pipeline is equipped with a high-concentration seawater shielded pump, the cooling water circulation pipeline is equipped with a cooling water pump, and the fresh water output pipeline is equipped with a fresh water shielded pump.

6. The solar-driven seawater vacuum desalination device according to claim 5, characterized in that: The vacuum seawater evaporator is also equipped with a vacuum degree detection gauge, the top of the vacuum seawater evaporator is connected to a vacuum pump through a vacuum pipeline, and the vacuum degree detection gauge and the vacuum pump are both electrically connected to a PLC controller; The first water level detector, the second water level detector, the third water level detector and the fourth water level detector are also electrically connected to the PLC controller; The seawater shielded pump, the high-concentration seawater shielded pump and the fresh water shielded pump are also electrically connected to the PLC controller.

7. The solar-driven seawater vacuum desalination device according to claim 1, characterized in that: The first heat exchanger and the second heat exchanger both include an input pipe and an output pipe. A plurality of heat exchange pipes are connected between the input pipe and the output pipe. The plurality of heat exchange pipes are all arranged in an S-shaped structure.

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