Seawater distillation module, seawater distillation device, seawater distillation system and distillation method

Abstract

The embodiment of the present application belongs to the technical field of seawater desalination, and particularly relates to a seawater distillation module, a seawater distillation device, a seawater distillation system and a distillation method. The seawater distillation module comprises a material liquid layer, an air gap layer, a gas permeable layer and a condensation layer. The material liquid layer has an inlet liquid side for guiding seawater to enter and an outlet liquid side for guiding seawater to flow out. The air gap layer is arranged opposite to the material liquid layer. The gas permeable layer is arranged between the material liquid layer and the air gap layer, and is used for separating the material liquid layer and the air gap layer. The gas permeable layer is used for allowing the seawater in the material liquid layer to pass through after being heated, and enter the air gap layer. The condensation layer is used for condensing the water vapor entering the air gap layer, so as to produce fresh water. Compared with the prior art, the seawater distillation device can meet the production of fresh water in island reef areas.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application belongs to the technical field of seawater desalination, and particularly relates to a seawater distillation module, a seawater distillation device, a seawater distillation system and a distillation method. BACKGROUND

[0002] Fresh water shortage is a problem that is universally concerned in the world today. 97.5% of water resources on the earth is seawater, and especially in the island reef area, fresh water is not easy to obtain, and seawater is an ideal raw material for fresh water production. Remote islands usually lack centralized energy supply, and large-scale commercial seawater desalination systems, such as reverse osmosis, multi-stage flash evaporation, multi-effect distillation, etc. are almost impossible to implement. SUMMARY

[0003] The purpose of the embodiment of the present application is to design a seawater distillation module, a seawater distillation device, a seawater distillation system and a distillation method, which can realize distillation of seawater by absorbing heat energy, so as to meet the production of fresh water in the island reef area.

[0004] In order to achieve the above purpose, the embodiment of the present application provides a seawater distillation module, which comprises:

[0005] A liquid layer; the liquid layer has a liquid inlet side for guiding seawater to enter and a liquid outlet side for guiding seawater to flow out;

[0006] An air gap layer, which is arranged opposite to the liquid layer;

[0007] A gas permeable layer, which is arranged between the liquid layer and the air gap layer, and is used to separate the liquid layer and the air gap layer; the gas permeable layer is used to allow water vapor generated by seawater in the liquid layer after being heated to pass through and enter the air gap layer;

[0008] A condensation layer, which is used to condense water vapor entering the air gap layer to produce fresh water.

[0009] In a specific embodiment, the liquid inlet side and the liquid outlet side are arranged in directions away from each other, and the seawater distillation module further comprises a separation component arranged in the liquid layer and separating the liquid layer into continuous S-shaped flow channels in the direction from the liquid inlet side to the liquid outlet side. In a specific embodiment, the separation component is formed by part of the gas permeable layer protruding into the liquid layer. In a specific embodiment, the gas permeable layer is a photothermal film having photothermal conversion performance and gas permeability; or the gas permeable layer is a hydrophobic film having gas permeability. In a specific embodiment, the condensation layer is a metal plate having heat conduction performance.

[0010] In addition, the embodiment of the present application further provides a seawater distillation device, comprising: a plurality of seawater distillation modules as described above, wherein each seawater distillation module is arranged in a stacked manner.

[0011] In the embodiment, the gas-permeable layer of the seawater distillation module at the uppermost layer is a photothermal film, the photothermal film absorbs light energy and converts the absorbed light energy into heat energy, and the seawater in the liquid layer of the seawater distillation module is heated, so that the water vapor generated when the seawater is heated enters the air gap layer of the seawater distillation module.

[0012] In a specific embodiment, each seawater distillation module is arranged in parallel along the stacking direction, or each seawater distillation module is connected in series along the stacking direction. In a specific embodiment, the seawater distillation module at the uppermost layer further comprises a light-transmitting cover plate for closing the liquid layer of the seawater distillation module.

[0013] In addition, the embodiment of the present application further provides a seawater distillation system, comprising:

[0014] a storage container for storing seawater;

[0015] a seawater distillation device as described above;

[0016] a conveying device for conveying the seawater stored in the storage container to the liquid layer of at least one seawater distillation module of the seawater distillation device;

[0017] a brine collection container for collecting the brine discharged from the liquid layer of at least one seawater distillation module;

[0018] a fresh water collection container for collecting the fresh water in the air gap layer of each seawater distillation module;

[0019] a main control device electrically connected with the conveying device, for controlling the rate of conveying seawater from the conveying device to the seawater distillation device.

[0020] In an embodiment, the seawater distillation system further comprises a storage heating device, the storage heating device is configured to absorb solar energy and heat the seawater entering the liquid layer of each seawater distillation module; wherein the storage heating device is electrically connected to the main control device, and the main control device is configured to open the storage heating device to heat the seawater entering the liquid layer of each seawater distillation module when the light intensity detected by the detection module is lower than the preset value. In an embodiment, the storage heating device comprises a storage module electrically connected to the main control device, configured to absorb solar energy and convert the absorbed solar energy into electrical energy for storage; a plurality of heating modules electrically connected to the main control device; the number of the heating modules is the same as the number of the seawater distillation modules, and each heating module is arranged in the liquid layer of the corresponding seawater distillation module; wherein the main control device is configured to obtain the electrical energy of the storage module when the light intensity detected by the detection module is lower than the preset value, and output the obtained electrical energy to each heating module to heat the seawater entering each liquid layer.

[0021] In addition, the embodiment of the present application also provides a seawater distillation method, which is applied to the seawater distillation system as described above, and the seawater distillation method comprises the following steps:

[0022] The main control device controls the conveying device to send the seawater in the storage container to the liquid layer of at least one seawater distillation module of the seawater distillation device;

[0023] The photothermal conversion layer of at least the seawater distillation module at the uppermost layer heats the seawater entering the liquid layer of the seawater distillation module, so that the heated seawater forms water vapor entering the air gap layer of the seawater distillation module, and the remaining seawater that has not evaporated is output to the liquid layer of the seawater distillation module adjacent thereto or directly discharged into the seawater collection container;

[0024] The condensation layer of at least one seawater distillation module condenses the water vapor entering the air gap layer of the seawater distillation module, so that the water vapor produces fresh water;

[0025] The air gap layer of at least one seawater distillation module discharges the fresh water to the fresh water collection container.

[0026] The embodiment of the present application, relative to the prior art, since the seawater distillation module comprises: liquid layer, air gap layer, air permeable layer and condensation layer, wherein the air permeable layer is arranged between the liquid layer and the air gap layer, and the air permeable layer can make the seawater entering the liquid layer pass through the water vapor generated by the heated seawater after being heated, and enter the air gap layer, and the water vapor entering the air gap layer can form fresh water under the condensation of the condensation layer, so that the seawater distillation device of the embodiment can meet the production of fresh water in the island reef area. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 For part of the embodiments of the present application, the structure diagram of the seawater distillation module is shown.

[0028] Figure 2 For part of the embodiments of the present application, the structure diagram of the seawater distillation module and another seawater distillation module is shown.

[0029] Figure 3 For part of the embodiments of the present application, the structure diagram of the seawater distillation module when the air permeable layer is provided with a separation component is shown.

[0030] Figure 4 For Figure 3 The sectional view at A-A in the middle.

[0031] Figure 5 For part of the embodiments of the present application, the structure diagram of the seawater distillation device when each seawater distillation module is used in parallel is shown.

[0032] Figure 6 For part of the embodiments of the present application, the structure diagram of the seawater distillation device when each seawater distillation module is used in series is shown.

[0033] Figure 7 For part of the embodiments of the present application, the structure diagram of the seawater distillation system is shown.

[0034] Figure 8 For part of the embodiments of the present application, the system module block diagram of the seawater distillation system is shown.

[0035] Figure 9 For part of the embodiments of the present application, the flowchart of the seawater distillation method is shown.

[0036] Figure 10 For part of the embodiments of the present application, the flowchart of the main control device controlling the conveying device is shown. DETAILED DESCRIPTION

[0037] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are presented in order to make the readers better understand the present application. However, the technical solutions claimed by the present application can be implemented even without these technical details and based on various changes and modifications of the following embodiments.

[0038] Solar energy is a distributed energy source available, and the water demand on the island is mostly scattered, small amount, so the small solar-driven distillation of seawater desalination method is concerned.

[0039] Membrane distillation is one of the strategies for solar-driven seawater desalination. Selective hydrophobic membranes only allow vapor molecules to pass through the pores, while liquids and salt ions are retained on the feed side. The energy grade required for membrane distillation is not high, and solar heat can be used. In order to improve the overall performance, solar-driven membrane distillation usually focuses on three aspects: 1) enhance solar absorption; 2) promote vapor permeation; 3) optimize energy management. First, the solar absorption layer is crucial for enhancing system energy input, which involves the development of high-efficiency photothermal materials. Second, optimizing the morphology and properties of the membrane (such as thickness, pore size and porosity) can improve transmembrane vapor transport. Third, optimization of energy management includes interfacial evaporation, suppression of heat loss and recovery of latent heat. Interfacial evaporation means limiting solar energy to the evaporation surface, which can reduce the energy waste caused by heating a large amount of water body; using transparent thermal insulation materials on the top can suppress heat loss in the device; multi-stage structure recovers condensation latent heat, which can improve distillation efficiency.

[0040] By solving the above three problems, high water production can be achieved, but salt accumulation and scaling can cause the evaporation layer to fail. Usually, hydrophilic materials are placed in the evaporation layer to pump brine, and their fiber structure exacerbates salt accumulation. Without using hydrophilic materials, allowing seawater to flow freely in the evaporation channel can achieve more stable water production.

[0041] The flow pattern of the feed seawater (series, parallel) also affects the performance of the device. The step-by-step series connection of the feed increases the flow path length, which can make the feed be heated more fully, and the energy utilization efficiency is high, but the seawater stays in the flow path for a long time, which is more prone to cause salt scaling. The parallel mode of each layer of seawater feed with independent flow path helps to discharge salt, but the short flow path makes the seawater not heated fully, and the energy utilization efficiency is low. To solve this contradiction, the flow pattern needs to be adjustable to optimize and balance the water production and salt scaling problems. The current photothermal membrane seawater desalination device lacks a comprehensive solution to the above problems.

[0042] Embodiment one

[0043] To overcome the above problems, the first embodiment of the present invention relates to a seawater distillation module, such as... Figure 1 As shown, the seawater distillation module 1 includes: a feed liquid layer 11, an air gap layer 12, a permeable layer 13, and a condensation layer 14. The feed liquid layer 11 has an inlet side 111 for guiding seawater in and an outlet side 112 for guiding seawater out.

[0044] Secondly, such as Figure 1 As shown, the air gap layer 12 and the feed liquid layer 11 are arranged opposite to each other. Meanwhile, a permeable layer 13 is disposed between the feed liquid layer 11 and the air gap layer 12, serving to separate the feed liquid layer 11 and the air gap layer 12. The permeable layer 13 allows water vapor generated by the heated seawater entering the feed liquid layer 11 to pass through and enter the air gap layer 12. Finally, as... Figure 1 As shown, the condensation layer 14 is used to condense the water vapor entering the air gap layer 12, so that the water vapor condenses to produce fresh water.

[0045] As can be seen from the above, the seawater distillation module 1 includes a liquid layer 11, an air gap layer 12, a permeable layer 13, and a condensation layer 14. The permeable layer 13 is disposed between the liquid layer 11 and the air gap layer 12. The permeable layer 13 allows the water vapor generated by the heated seawater entering the liquid layer 11 to pass through and enter the air gap layer 12. The water vapor entering the air gap layer 12 can then form fresh water under the condensation effect of the condensation layer 15. Thus, the seawater distillation device of this embodiment can meet the needs of freshwater production in island and reef areas.

[0046] Specifically, in some embodiments, such as Figure 1 As shown, the thickness of the feed liquid layer 11 is 2 mm. Therefore, the amount of seawater entering the feed liquid layer 11 can be controlled to a certain extent, allowing the seawater to evaporate quickly after entering the feed liquid layer 11. Furthermore, in other embodiments, such as... Figure 1 As shown, the condensation layer 14 is positioned away from the liquid layer 11 and is positioned opposite to the permeable layer 13. An air gap layer 12 is formed between the condensation layer 14 and the permeable layer 13. The thickness of the air gap layer 12 is the same as that of the liquid layer 11, which is 2 mm. Because the air gap layer 12 is relatively narrow, water vapor can directly contact the condensation layer 14 after entering the air gap layer 12, thereby achieving rapid condensation of water vapor.

[0047] In addition, in order to improve the sealing performance of the air gap layer 12, such as Figure 1As shown, the seawater distillation module of the embodiment further comprises a first sealing gasket 15, which is arranged between the condensation layer 14 and the air-permeable layer 13 and abuts against the condensation layer 14 and the air-permeable layer 13 respectively, and the area surrounded by the first sealing gasket 15 is the air gap layer 12. The first sealing gasket 15 can improve the sealing performance of the air gap layer 12, so that the condensation layer 14 can have a better condensation effect on the water vapor entering the air gap layer 12. It should be noted that in the embodiment, the first sealing gasket 15 is a flexible gasket, for example, a silica gel gasket or a rubber gasket. Of course, in other embodiments, the first sealing gasket 15 can also be a gasket made of other materials, and the material of the first sealing gasket 15 is not limited in the embodiment.

[0048] In addition, it is worth mentioning that, as Figure 1 shown, the first sealing gasket 15 is further provided with a freshwater outlet end 151. The water vapor entering the air gap layer 12 can be condensed to form freshwater, which can be guided out of the air gap layer 12 through the freshwater outlet end 151. It should be noted that the freshwater outlet end 151 can be a freshwater outlet provided on the first sealing gasket 15, through which the freshwater formed in the air gap layer 12 can be smoothly discharged. Of course, in other embodiments, the freshwater outlet end 151 can also be a pipe joint provided on the first sealing gasket 15.

[0049] Secondly, in the embodiment, as Figure 2 shown, the seawater distillation module 1 is further arranged in stack with another seawater distillation module 1. Thus, the condensation layer 14 can form the feed liquid layer 11 with the air gap layer 12 of the other seawater distillation module 1, and the condensation layer 15 is used to absorb the cold of the seawater entering the feed liquid layer 11 of the other seawater distillation module 1 and exchange heat with the water vapor entering the air gap layer 12, so as to further improve the condensation effect on the water vapor, so that the water vapor entering the air gap layer 12 can quickly produce condensed water.

[0050] In addition, as Figure 1 shown, the seawater distillation module of the embodiment further comprises a second sealing gasket 16, and in combination with Figure 2As shown, the second sealing gasket 16 is disposed between the condensation layer 14 of the seawater distillation module 1 and the permeable layer 13 of the other seawater distillation module 1. Simultaneously, the area enclosed by the second sealing gasket 16 is the liquid layer 11. The second sealing gasket 16 improves the sealing performance of the liquid layer 11 and also prevents the water vapor formed after the seawater evaporates within the liquid layer 11 from being affected by external cold air, thus preventing direct condensation of the water vapor within the liquid layer 11. Furthermore, it should be noted that in this embodiment, the second sealing gasket 16 is a flexible gasket, such as a silicone gasket or a rubber gasket. Of course, in other embodiments, the second sealing gasket 16 can also be made of other materials, but in this embodiment, the material of the second sealing gasket 16 is not specifically limited. In addition, as... Figure 1 As shown, the second sealing gasket 16 is also provided with a seawater inlet end 161 communicating with the inlet side 111 and a seawater outlet end 162 communicating with the outlet side 112. It should be noted that in some embodiments, the seawater inlet end 161 can be an inlet port provided on the second sealing gasket 16, and the seawater outlet end 162 can be an outlet port provided on the second sealing gasket 16. In other embodiments, the seawater inlet end 161 and the seawater outlet end 162 can also be pipe joints respectively provided on the second sealing gasket 16.

[0051] Furthermore, in order to heat the seawater entering the feed layer 11, the permeable layer is a photothermal film with photothermal conversion and air permeability, or it can be a hydrophobic film with air permeability. For example, when seawater distillation module 1 is stacked and assembled with another seawater distillation module 1, combined with... Figure 2 As shown, since the permeable layer 13 in the uppermost seawater distillation module 1 is directly exposed to sunlight, it can be a photothermal film. This film absorbs light energy, such as solar energy, and converts it into heat energy to heat the seawater in the liquid layer 11 of the seawater distillation module 1. The water vapor formed after the seawater is heated can then pass through the photothermal film into the air gap layer 12. Since the lower modules do not receive solar radiation, the permeable layer 13 in the lower seawater distillation module 1 can be a non-photothermal hydrophobic permeable film. (Combined with...) Figure 2 As shown, the lower seawater absorbs the heat released when condensing steam in the upper air gap layer 12, allowing this portion of seawater to continue absorbing heat and evaporating. It can then pass through the hydrophobic and breathable membrane into the air gap layer 12 of the lower water distillation module 1. In this way, the seawater distillation module 1 of this embodiment can achieve heat recovery after being assembled with another seawater distillation module 1, thereby improving the freshwater production efficiency.

[0052] In addition, in order to ensure that the seawater is sufficiently heated after entering the feed liquid layer 11 from the inlet side 111, such asFigure 1 As shown, the liquid inlet side 111 and the liquid outlet side 112 of the liquid layer 11 can be arranged in a direction away from each other, and as a preferred embodiment, in other embodiments, as shown in Figure 3 and Figure 4 As shown, the seawater distillation module 1 further comprises a partition member 17, and the partition member 17 is arranged in the liquid layer 11 and separates the liquid layer 11 into a continuous S-shaped flow channel 113 in the direction from the liquid inlet side 111 to the liquid outlet side 112. The S-shaped flow channel 113 can sufficiently increase the path and time of seawater flowing in the liquid layer 11, so that the seawater can be heated more sufficiently after entering the liquid layer 11, so that more water vapor can be generated after the seawater is heated to enter the air gap layer 12 through the gas permeable layer 13, so that more fresh water can be produced in the air gap layer 12 after the water vapor is condensed.

[0053] And as shown, Figure 3 The partition member 17 is formed by part of the gas permeable layer 13 protruding into the liquid layer 11, so that the partition member 17 can be part of the gas permeable layer 13 and increase the heating area of the gas permeable layer 13 to seawater, so that the partition member 17 can also be passed by water vapor and can evaporate seawater more sufficiently. It should be noted that in the present embodiment, the thickness of the gas permeable layer 13 is not too large or too small, such as 0.1mm-0.2mm, for example, the thickness of the gas permeable layer 13 can be 0.16mm, so that the water vapor formed after the seawater evaporates can quickly pass through the gas permeable layer 13 and enter the air gap layer 12, and not to be severely deformed. Of course, as an alternative, in other embodiments, the partition member 17 can also be an independent component arranged in the liquid layer 11, and in the present embodiment, the structure of the partition member 17 is not limited.

[0054] In addition, it is worth mentioning that, in order to enable the water vapor to be condensed by the condensation layer 14 after entering the air gap layer 12 through the gas-permeable layer 13. The condensation layer 14 is a metal plate with heat conduction performance, for example, the condensation layer 14 can be an aluminum plate, an iron plate, a steel plate, etc. Since the metal plate has high heat conduction performance, the heat of the water vapor entering the air gap layer 12 can be quickly exchanged with the cold of the seawater in the feed liquid layer 11 of the seawater distillation module 1, which can further improve the condensation efficiency of the water vapor, so that more fresh water can be produced in the air gap layer 12. In addition, in order to be able to maintain the rigidity of the feed liquid layer 11 and the air gap layer 12 without increasing the volume of the seawater distillation module, and avoid deformation, the condensation layer 14 should not be too thick or too thin, therefore, the thickness of the condensation layer 14 should be controlled within 0.8mm-1.5mm, for example, in the embodiment, the thickness of the condensation layer 14 is 1mm, so that the seawater distillation module 1 of the embodiment can have a smaller volume while ensuring that the condensation layer 14 has a faster condensation efficiency for the water vapor entering the air gap layer 12.

[0055] Embodiment two

[0056] The second embodiment of the present application relates to a seawater distillation device, as shown in Figure 5 , comprising a plurality of seawater distillation modules 1 as described in embodiment one, and each seawater distillation module 1 is arranged in sequence.

[0057] In addition, as shown in Figure 5 and Figure 6 , the gas-permeable layer 13 of the uppermost seawater distillation module 1 is a light-heat conversion layer 13a with gas permeability, which can use the light-heat film as described in the first embodiment, and the gas-permeable layers 13b of the remaining seawater distillation modules 1 can use the hydrophobic film as described in embodiment one.

[0058] Among them, as shown in Figure 5 and Figure 6 , the light-heat conversion layer 13a is used to absorb light energy and convert the absorbed light energy into heat energy to heat the seawater in the feed liquid layer 11 of the seawater distillation module 1, and the water vapor generated when the seawater is heated can enter the air gap layer 12 of the seawater distillation module 1 through the light-heat conversion layer 13a.

[0059] As can be seen from the above, since the air-permeable layer 13 in the uppermost seawater distillation module 1 is the light-heat conversion layer 13a, the light-heat conversion layer 13a can directly face the sunlight, so that the light-heat conversion layer can absorb light energy, such as solar energy, and convert the absorbed light energy into heat energy to heat the seawater in the liquid layer 11 in the seawater distillation module 1, and the water vapor formed after the seawater is heated can enter the air gap layer 12 through the light-heat conversion layer 13a. The remaining liquid layers 11 in the seawater distillation module 1 can absorb the heat released by the condensation of steam in the air gap layer 12 above, form water vapor, and enter the respective air gap layers 12 through the air-permeable layer 13b. In this way, the seawater distillation device of the present embodiment can realize heat recovery, thereby improving the production efficiency of fresh water.

[0060] Specifically, in other embodiments, as shown in Figure 5 and Figure 6 , the seawater distillation device further comprises a pipeline assembly 2, and the pipeline assembly 2 at least comprises a plurality of liquid inlet pipes 21 and a plurality of liquid outlet pipes 22. The number of liquid inlet pipes 21 is the same as and corresponds to the number of seawater distillation modules 1, and each liquid inlet pipe 21 is partially inserted into the liquid layer 11 of the seawater distillation module 1 from the liquid inlet side 111 of the seawater distillation module 1. Secondly, the number of liquid outlet pipes 22 is the same as and corresponds to the number of seawater distillation modules 1, and each liquid outlet pipe 22 is partially inserted into the liquid layer 11 of the seawater distillation module 1 from the liquid outlet side 112 of the seawater distillation module 1. For example, as shown in Figure 5 and Figure 6 , the liquid inlet pipe 21 can be partially inserted into the liquid layer 11 from the seawater inlet end 161 of each second sealing gasket 16, and the liquid outlet pipe 22 can be partially inserted into the liquid layer 11 from the seawater outlet end 162 of each second sealing gasket 16.

[0061] And since each seawater distillation module 1 is stacked in sequence, in some embodiments, as shown in Figure 6 , each seawater distillation module 1 can be arranged in parallel along the stacking direction, and the liquid inlet sides 111 of each liquid layer 11 of the seawater distillation device are arranged on the same side, and the liquid outlet sides 112 of each liquid layer 11 are arranged on the same side, so that the liquid inlet direction and the liquid outlet direction of each liquid layer 11 of each seawater distillation module 1 are the same. Alternatively, the liquid inlet side 111 of each seawater distillation module 1 can be arranged on the same side as the liquid outlet side 112 of the seawater distillation module 1 adjacent thereto, so that the liquid inlet direction and the liquid outlet direction of the liquid layer 11 of each of the two adjacent groups of seawater distillation modules 1 are opposite. As can be seen, by arranging the seawater distillation modules 1 in parallel, the liquid can quickly flow into and out of the respective liquid layers 11, reducing the length of the flow channel and thus reducing the risk of salt crystallization.

[0062] Alternatively, in other embodiments, as shown in Figure 6 each seawater distillation module 1 can also be connected in series along the stacking direction, so when each seawater distillation module 1 is connected in series, the liquid inlet side 111 of each seawater distillation module 1 is arranged on the same side as the liquid outlet side 112 of the seawater distillation module 1 adjacent thereto. In addition, in these other embodiments, as shown in Figure 7 the pipeline assembly 2 further comprises a plurality of connecting pipes 23. The liquid inlet pipe 21 inserted into the brine layer 11 of each seawater distillation module 1 is connected to the liquid outlet pipe 22 inserted into the brine layer 11 of the seawater distillation module 1 adjacent thereto by a connecting pipe 23. Thus, as shown in Figure 2 and Figure 6 the liquid inlet pipe 21 inserted into the brine layer 11 of the uppermost seawater distillation module 1 can be connected to the storage container 3 for storing seawater, and the liquid outlet pipe 22 inserted into the brine layer 11 of the lowermost seawater distillation module 1 can be connected to the brine collection container 4 for storing brine. Of course, in other embodiments, the liquid inlet pipe 21 inserted into the brine layer 11 of the lowermost seawater distillation module 1 can be connected to the storage container 3 for storing seawater, and the liquid outlet pipe 22 inserted into the brine layer 11 of the uppermost seawater distillation module 1 can be connected to the brine collection container 4 for storing brine. It can be seen that, by this connection mode, the path of seawater flow can be increased, so that the brine can be heated and evaporated sufficiently, thereby increasing the yield of fresh water.

[0063] In addition, in order to ensure the sealing performance of the seawater distillation device, as shown in Figure 7 and Figure 1 the uppermost seawater distillation module 1 further comprises a light-transmitting cover plate 18 for sealing the brine layer 11 of the seawater distillation module 1, so that the brine layer 11 of the uppermost seawater distillation module 1 can be sealed while the light absorption performance of the light-heat conversion layer 13a is ensured, and the light-heat conversion layer 13 can have higher heating efficiency when heating the seawater in the brine layer 11. It should be noted that, in some embodiments, the light-transmitting cover plate 18 can be made of an acrylic plate, a glass plate or a plastic plate having light-transmitting performance, so that sunlight can directly pass through the light-transmitting cover plate 18 and enter the brine layer 11, and be received by the light-heat conversion layer 13a, so that the light-heat conversion layer 13a can convert light energy into heat energy to heat the seawater entering the brine layer 11.

[0064] Embodiment Three

[0065] The third embodiment of the present application relates to a seawater distillation system, as shown in Figure 7 which comprises a storage container 3, a seawater distillation device 100 as described in the second embodiment, a conveying device 5, a brine collection container 4, a fresh water collection container 6 and a main control device 200.

[0066] As shown in Figure 8 , the storage container 3 is used for storing seawater, and the delivery device 5 is used for delivering the seawater stored in the storage container 3 into the liquid layer 11 of at least one seawater distillation module 1 of the seawater distillation device 100. In addition, as shown in Figure 7 , the brine collection container 4 is used for collecting the brine discharged from the liquid layer 11 of at least one seawater distillation module, and the fresh water collection container 6 is used for collecting the fresh water in the air gap layer 12 of each seawater distillation module 1.

[0067] Finally, as shown in Figure 8 , the main control device 200 is electrically connected with the delivery device 5, and the main control device 200 is used for controlling the rate of the delivery device 5 for delivering seawater to the seawater distillation device 100.

[0068] From the above, it can be seen that, since the delivery device 5 can deliver the seawater stored in the storage container 3 into each liquid layer 11 of the seawater distillation device 100, and the main control device 200 can control the rate of the delivery device 5 for delivering seawater, the automatic production of fresh water by the seawater distillation system can be achieved.

[0069] Specifically, in the embodiment, the delivery device 5 is a peristaltic pump delivery device, and in other embodiments, as shown in Figure 8 , the seawater distillation device 100 is arranged in an inclined manner, so that the liquid outlet side 112 of each liquid layer 11 is higher than the liquid inlet side 111 by means of the inclination angle of the seawater distillation device 100. Alternatively, the liquid outlet side 112 of each liquid layer 11 is lower than the liquid inlet side 111. Therefore, when the liquid layers 11 of each seawater distillation module 1 are connected in series, by arranging the seawater distillation device 100 in an inclined manner, the condensate can be easily discharged, and the rate of seawater passing through can be slowed down, so that the seawater can be more fully evaporated in the liquid layer 11.

[0070] In addition, it is worth mentioning that, in other embodiments, as shown in Figure 8As shown, the seawater distillation system further comprises a detection module 8, and the detection module 8 is arranged on the seawater distillation device 1 and electrically connected with the main control device 200. The detection module 8 is used for detecting the light intensity, so that the main control device 200 can control the liquid delivery rate of the delivery device 5 according to the light intensity detected by the detection module 8. For example, when the light intensity detected by the detection module 8 gradually increases, it means that the heating temperature of the photo-thermal conversion layer 13a on the seawater is getting higher and higher. At this time, in order to ensure the stable production efficiency of fresh water and avoid the rapid generation of salt crystals, the main control device 200 can speed up the seawater delivery rate of the delivery device 5. Conversely, when the light intensity detected by the detection module 8 gradually decreases, it means that the heating temperature of the photo-thermal conversion layer 13a is getting lower and lower. At this time, in order to ensure that the seawater can be fully evaporated in the liquid layer 11 under the heating of the photo-thermal conversion layer 13a, the main control device 200 can reduce the seawater delivery rate of the delivery device 5. It should be noted that in some embodiments, the detection module 8 can use a light sensor to sense the light intensity of the external environment.

[0071] However, as a preferred embodiment, as shown in Figure 8 As shown, the seawater distillation system further comprises an energy storage heating device 9, and the energy storage heating device 9 is used for absorbing solar energy and converting the absorbed solar energy into electrical energy for storage. At the same time, the energy storage heating device 9 also heats the seawater entering the liquid layer 11 of each seawater distillation module 1. Specifically, as shown in Figure 9 As shown, the energy storage heating device 9 can be electrically connected with the main control device 200, and the main control device 9 is used for opening the energy storage heating device 9 when the light intensity detected by the detection module 8 is lower than the preset value, so that the energy storage heating device 9 heats the seawater entering the liquid layer 11 of each seawater distillation module 1. That is, since the photo-thermal conversion layer 13a converts the received solar energy into heat energy to heat the seawater, but in the case of no sunlight, such as at night or in rainy weather, the photo-thermal conversion layer 13a cannot heat the seawater due to insufficient light. Therefore, by arranging the energy storage heating device 9, the energy storage heating device 9 absorbs solar energy and converts the solar energy into electrical energy for storage. Once the light is insufficient, the main control device 200 can open the energy storage heating device 9, so that the energy storage heating device 9 heats the seawater entering each liquid layer 11, thereby meeting the production demand of fresh water in the case of insufficient light such as rainy and night.

[0072] In order to enable the energy storage heating device 9 to absorb solar energy, convert the absorbed solar energy into electrical energy for storage, and also enable the energy storage heating device 9 to heat the seawater. In other embodiments, as shown in Figure 10As shown, the energy storage heating device 9 comprises an energy storage module 91 and a plurality of heating modules 92. The energy storage module 91 can be electrically connected with the master control device 200, and the energy storage module 91 can be used to absorb solar energy and convert the absorbed solar energy into electrical energy for storage. For example, the energy storage module can be composed of a plurality of photovoltaic panels and storage batteries, the photovoltaic panels are used to absorb solar energy, and the absorbed solar energy is converted into electrical energy, and the storage batteries are used to store the converted electrical energy.

[0073] In addition, each heating module 92 can adopt a heating resistor, and each heating module 92 is also electrically connected with the master control device 200. At the same time, the number of heating modules 92 is the same as the number of seawater distillation modules 1, and each heating module 92 is arranged in the liquid layer 11 of the seawater distillation module 1 corresponding thereto. Therefore, when the light intensity detected by the detection module 8 is lower than the preset value, the master control device 200 can obtain the electrical energy of the energy storage module, and output the obtained electrical energy to each heating module 92, so that each heating module 92 can heat the seawater entering each liquid layer 11, to ensure the continuous production of fresh water.

[0074] Embodiment four

[0075] The fourth embodiment of the present application relates to a seawater distillation method applied to the seawater distillation system as described in embodiment three, and as shown, the seawater distillation method comprises the following steps: Figure 10

[0076] Step 910, the master control device 200 controls the conveying device 5, so that the conveying device 5 can send the seawater in the storage container 3 into the liquid layer 11 of at least one seawater distillation module 1 of the seawater distillation device 100.

[0077] Step 920, the light-heat conversion layer 13a of at least the seawater distillation module 1 located in the uppermost layer heats the seawater entering the liquid layer 11 of the seawater distillation module 1, so that the heated seawater forms water vapor entering the air gap layer 12 of the seawater distillation module 1, and the remaining brine that has not evaporated is output to the liquid layer 11 of the seawater distillation module 1 adjacent thereto, or directly discharged into the brine collection container 4.

[0078] Step 930, the condensation layer 14 of at least one seawater distillation module 1 condenses the water vapor entering the air gap layer 12 of the seawater distillation module 1, so that the water vapor produces fresh water.

[0079] Step 940, the air gap layer 12 of at least one seawater distillation module 1 discharges the fresh water to the fresh water collection container 6.

[0080] ​As can be seen from the above, the seawater distillation method of the present embodiment can be applied to the seawater distillation system of the third embodiment to meet the requirement of automatic production of fresh water in island reef areas.

[0081] In order to stabilize and improve the production quality and efficiency of fresh water, the main control device 200 controls the conveying device 5 to send the seawater in the storage container 3 to the feed liquid layer 11 of at least one seawater distillation module 1 of the seawater distillation device 100, i.e., step 910, as shown in the flowchart, which specifically includes: Figure 10

[0082] Step 9101, the detection module 8 detects the light intensity and sends the detected light intensity to the main control device 200.

[0083] Step 9106, the main control device 200 controls the conveying rate of the conveying device 5 according to the light intensity detected by the detection module 8. For example, when the detected light intensity continuously increases, the main control device 200 can control the conveying device 5 to continuously increase the conveying rate of seawater. When the detected light intensity gradually decreases, the main control device 200 can control the conveying device to continuously decrease the conveying rate of seawater. Since the conveying rate of the conveying device 5 is related to the light intensity detected by the detection module 8, i.e., the conveying rate of the conveying device 5 increases with the continuous increase of the light intensity, and decreases with the continuous decrease of the light intensity, so that the seawater distillation method of the present embodiment can increase the flow rate of the feed liquid to stabilize the fresh water production under sufficient light, and can also ensure that the seawater can be fully heated to evaporate under insufficient light, thereby ensuring the production quality of fresh water.

[0084] In addition, as a preferred option, in other embodiments, after the detection module 8 detects the light intensity and sends the detected light intensity to the main control device 200, i.e., after step 9101, and before the main control device 200 controls the conveying rate of the conveying device 5 according to the detected light intensity, i.e., before step 9106, as shown in the flowchart, the seawater distillation method of the present embodiment further includes: ​

[0085] Step 9102, the main control device 200 determines whether the light intensity is less than a preset value according to the detected light intensity.

[0086] ​​Step 9103, if the master device 200 determines that the light intensity is less than the preset value, the master device 200 opens the energy storage heating device 9, so that the energy storage heating device 9 heats the seawater entering the material liquid layer 11 of each seawater distillation module 1. Through the judgment of the master device 200 on whether the light intensity is less than the preset value, when the light is insufficient, that is, when the master device 200 determines that the light intensity is less than the preset value, the master device 200 can continue to heat the seawater entering each material liquid layer 11 by opening the energy storage heating device 9, thereby meeting the production demand of fresh water of the seawater distillation system in the case of insufficient light such as rain, night, etc.

[0087] If the master device 200 determines that the light intensity is not less than the preset value, step 9106 is continued, that is, the master device 200 controls the seawater conveying rate of the conveying device 5 according to the detected light intensity.

[0088] In addition, after the master device determines that the light intensity is not less than the preset value, that is, after step 9102, if ​ As shown in the figure, the seawater distillation method of the embodiment further includes the following steps:

[0089] Step 9104, the master device 200 continues to determine whether the energy storage heating device 9 is opened.

[0090] Step 9105, if the master device 200 determines that the energy storage heating device 9 is opened, the master device 200 closes the energy storage heating device 9, so that the energy storage heating device 9 stops heating the seawater entering the material liquid layer 11 of each seawater distillation module 1. It is not difficult to find that when the light is sufficient, that is, when the master device 200 determines that the light intensity is not less than the preset value, the master device 200 can close the energy storage heating device 9, so that the energy storage heating device 9 can be prevented from wasting energy while ensuring the evaporation efficiency of seawater, thereby ensuring that the seawater distillation system can evaporate seawater in the case of insufficient light to meet the continuous production of fresh water.

[0091] From the above, it is not difficult to see that the embodiment is an embodiment of the seawater distillation method of the seawater distillation system corresponding to the third embodiment, and the embodiment can be implemented in cooperation with the third embodiment. The related technical details mentioned in the third embodiment are still effective in this embodiment. In order to reduce repetition, they will not be repeated here. Correspondingly, the related technical details mentioned in this embodiment can also be applied in the third embodiment.

[0092] Those skilled in the art can understand that the above embodiments are specific embodiments for implementing the present application, and in actual application, various changes can be made in form and detail without departing from the spirit and scope of the present application.

Claims

1. A sea water distillation module, characterized by, The seawater distillation module comprises: a feed liquid layer; the feed liquid layer has a liquid inlet side for guiding seawater to enter and a liquid outlet side for guiding seawater to flow out; a gas gap layer is arranged opposite to the feed liquid layer; a gas permeable layer is arranged between the feed liquid layer and the gas gap layer to separate the feed liquid layer and the gas gap layer; the gas permeable layer is a photothermal film with photothermal conversion performance and gas permeability or a hydrophobic film with gas permeability; the gas permeable layer is used for allowing the seawater entering the feed liquid layer to pass through after being heated and enter the gas gap layer; a condensing layer is arranged opposite to the gas permeable layer in a direction away from the feed liquid layer, and the condensing layer and the gas permeable layer form the gas gap layer; the condensing layer is a metal plate with a thickness of 0.8-1.5 mm, which is used for condensing the water vapor entering the gas gap layer to produce fresh water; the liquid inlet side and the liquid outlet side are arranged in a direction away from each other, and a separation component is arranged in the feed liquid layer; the separation component separates the feed liquid layer into continuous S-shaped flow channels along the direction from the liquid inlet side to the liquid outlet side; the separation component is formed by protruding part of the gas permeable layer into the feed liquid layer; the seawater distillation module is also used for being arranged in stack with another seawater distillation module; wherein the condensing layer and the gas gap layer of another seawater distillation module form the feed liquid layer; the condensing layer is used for absorbing the cold of the seawater entering the feed liquid layer of another seawater distillation module and exchanging the cold with the water vapor entering the gas gap layer to produce condensed water; the gas permeable layer of the seawater distillation module at the uppermost layer is a photothermal film, and the gas permeable layer of the seawater distillation module at the lower layer is a hydrophobic film.

2. A sea water distilling apparatus, characterised in that, The seawater distillation device comprises: a plurality of seawater distillation modules as claimed in claim 1, and each seawater distillation module is arranged in stack in sequence.

3. The apparatus of claim 2, wherein The seawater distillation device further comprises a pipeline assembly, and the pipeline assembly at least comprises: a plurality of liquid inlet pipes, the number of the liquid inlet pipes is the same as the number of the seawater distillation modules and corresponds to each other uniquely; wherein each liquid inlet pipe is partially inserted into the feed liquid layer of the seawater distillation module corresponding to the liquid inlet pipe from the liquid inlet side of the seawater distillation module; a plurality of liquid outlet pipes, the number of the liquid outlet pipes is the same as the number of the seawater distillation modules and corresponds to each other uniquely; wherein each liquid outlet pipe is partially inserted into the feed liquid layer of the seawater distillation module corresponding to the liquid outlet pipe from the liquid outlet side of the seawater distillation module.

4. A seawater distillation system characterized by, The seawater distillation device comprises: a storage container for storing seawater; the seawater distillation device as claimed in any one of claims 2 or 3; a conveying device for conveying the seawater stored in the storage container into the feed liquid layer of at least one seawater distillation module of the seawater distillation device; a brine collection container for collecting the brine discharged from the feed liquid layer of at least one seawater distillation module; a fresh water collection container for collecting the fresh water in each gas gap layer of each seawater distillation module; a main control device electrically connected with the conveying device and used for controlling the conveying rate of the seawater conveyed by the conveying device to the seawater distillation device.

5. The seawater distillation system of claim 4, wherein, The seawater distillation system further comprises: a detection module arranged on the seawater distillation device and electrically connected with the main control device; the detection module is used for detecting the light intensity; The main control device is used for controlling the infusion rate of the conveying device according to the light intensity detected by the detection module.

6. A method of distilling seawater, characterized by, The seawater distillation method is applied to the seawater distillation system according to any one of claims 4 or 5, and characterized in that it comprises the following steps: The main control device controls the conveying device to send the seawater in the storage container into the liquid layer of at least one seawater distillation module of the seawater distillation device; The photo-thermal conversion layer of at least the seawater distillation module located at the uppermost layer heats the seawater entering the liquid layer of the seawater distillation module, so that the heated seawater forms water vapor entering the air gap layer of the seawater distillation module, and the remaining salt water that has not evaporated is output to the liquid layer of the seawater distillation module adjacent thereto or directly discharged into the salt water collection container; The condensation layer of at least one seawater distillation module condenses the water vapor entering the air gap layer of the seawater distillation module, so that the water vapor produces fresh water; The air gap layer of at least one seawater distillation module discharges the fresh water to the fresh water collection container.

7. The seawater distillation method according to claim 6, characterized in that, In the step of controlling the conveying device by the main control device to send the seawater in the storage container into the liquid layer of at least one seawater distillation module of the seawater distillation device, specifically comprising: The detection module detects the light intensity and sends the detected light intensity to the main control device; The main control device controls the seawater conveying rate of the conveying device according to the light intensity detected by the detection module; After detecting the light intensity and sending the detected light intensity to the main control device, and before the main control device controls the seawater conveying rate of the conveying device according to the detected light intensity, the seawater distillation method further comprises: The main control device determines whether the light intensity is less than a preset value according to the detected light intensity; If the main control device determines that the light intensity is less than the preset value, the main control device turns on the energy storage heating device to heat the seawater entering the liquid layer of each seawater distillation module; If the main control device determines that the light intensity is not less than the preset value, the main control device controls the seawater conveying rate of the conveying device according to the detected light intensity; After the main control device determines that the light intensity is not less than the preset value, the main control device continues to determine whether the energy storage heating device is turned on; If the main control device determines that the energy storage heating device is turned on, the main control device turns off the energy storage heating device to stop heating the seawater entering the liquid layer of each seawater distillation module.

8. The seawater distillation method according to claim 7, characterized in that, In the step of controlling the rate of the seawater delivered by the delivery device according to the detected illumination intensity by the master control device, specifically comprising: When the illumination intensity detected by the detection module continuously increases, the master control device controls the rate of the seawater delivered by the delivery device to continuously increase; When the illumination intensity detected by the detection module gradually decreases, the master control device controls the rate of the seawater delivered by the delivery device to continuously decrease.

Images