A clean water acquisition device based on vacuum tube photothermal evaporation

Abstract

The present invention discloses a clean water acquisition device based on vacuum tube photothermal evaporation, which belongs to the field of water treatment and includes a vacuum tube, wherein the vacuum tube includes an inner tube, an outer tube and a vacuum interlayer; a capillary assembly is arranged in the vacuum tube, the capillary assembly includes a tube rack and a capillary fixed on the tube rack, and a photothermal evaporation layer made of a water-absorbing material is arranged between the outer side of the capillary assembly and the inner wall of the vacuum tube; the upper end of the photothermal evaporation layer is fixedly connected to the upper end of the tube rack, and a raw water conveying channel is arranged at the upper end of the tube rack; a raw water supply channel, a wastewater discharge channel and a clean water discharge channel are arranged at the lower end of the tube rack. The present invention effectively improves the evaporation rate of water on the photothermal evaporation layer by setting the vacuum tube, and provides a low-temperature environment suitable for condensation through the outer wall of the capillary, thereby effectively improving the efficiency of obtaining clean water.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to a clean water acquisition device based on vacuum tube photothermal evaporation. Background Art

[0002] Water resources are the foundation of human survival and development. The United Nations has also proposed relevant development goals for sustainable development. In order to achieve this goal, it is necessary to improve the efficiency and quality of water resources and promote water conservation and reuse of water resources.

[0003] However, due to the uneven distribution of water resources and the relative scarcity of global drinkable fresh water resources, and as the speed of human society development gradually increases, human demand for high-quality drinking water is also increasing. Therefore, how to obtain drinking water quickly, effectively and at low cost has become a crucial technical node.

[0004] In addition, the water problem for survival in some remote areas, areas with extreme shortage of drinking water, areas with serious surface water or groundwater pollution, and areas with heavy salinity is also restricted by the geographical environment and economic investment.

[0005] Therefore, developing a pure water acquisition technology that can utilize nature's renewable resources as the main energy source and get rid of the limitations of drinking water due to geographical environment will provide a new solution to the drinking water problem.

[0006] Solar energy is an inexhaustible clean energy in nature. At present, evaporation-condensation technology has been applied in various fields. It mainly uses sunlight to heat liquid water, so that the water evaporates and produces water vapor. When the water vapor is cooled, it can condense into liquid clean water.

[0007] However, the current evaporative condensation technology and devices are relatively simple. Most of them only build a transparent sunshade above the water source. The water vapor evaporated from the water source rises and is blocked by the transparent sunshade, and then condenses on the inner wall of the transparent sunshade, thereby collecting clean condensed water; however, since the transparent sunshade always receives light, its temperature is relatively high, resulting in poor condensation effect of water vapor. Sometimes, it is even necessary to equip the transparent sunshade with cold water for heat dissipation. It can be seen that the existing evaporative condensation technology and devices still have the problem of low condensation efficiency. In addition, the transparent sunshade cannot efficiently convert solar energy into heat energy, which leads to a low water evaporation rate, resulting in a low overall clean water collection rate of the existing technology device. Summary of the invention

[0008] In view of the problem that the evaporation-condensation technology devices in the prior art have low water evaporation rate and low condensation efficiency, which leads to low clean water collection efficiency, the purpose of the present invention is to provide a clean water acquisition device based on vacuum tube photothermal evaporation, so as to at least partially solve the above problems.

[0009] To achieve the above object, the technical solution of the present invention is:

[0010] In a first aspect, the present invention provides a clean water acquisition device based on vacuum tube photothermal evaporation, comprising a vacuum tube, wherein the vacuum tube comprises an inner tube and an outer tube and a vacuum interlayer enclosed between the inner tube and the outer tube; a capillary assembly is arranged in the vacuum tube, wherein the capillary assembly comprises a tube rack and a capillary fixed on the tube rack, and a photothermal evaporation layer made of a water-absorbing material is arranged between the outer side of the capillary assembly and the inner wall of the vacuum tube; the upper end of the photothermal evaporation layer is fixedly connected to the upper end of the tube rack, and the upper end of the tube rack is provided with a raw water conveying channel for connecting the capillary and the photothermal evaporation layer; the lower end of the tube rack is provided with a raw water supply channel for supplying water to the lower end of the capillary, a wastewater discharge channel for collecting wastewater discharged from the lower end of the photothermal evaporation layer, and a clean water discharge channel for collecting clean water condensed from the outer wall of the capillary.

[0011] In a preferred embodiment, the tube rack comprises a top member, a bottom member and a supporting member; the top member and the bottom member are both provided with tube holes adapted to the capillary tube, and the two ends of the capillary tube are respectively fixed in the tube holes provided on the top member and the bottom member;

[0012] The bottom member is sealed and fixed to the inner wall of the lower end of the vacuum tube, and a clean water tank located inside and a waste water collecting tank located outside are provided on one side of the top surface of the bottom member, and each pipe hole on the bottom member is located in the clean water tank; a clean water pipe joint connected to the clean water tank is provided on one side of the bottom surface of the bottom member, and the clean water tank and the clean water pipe joint constitute the clean water discharge channel; a water supply annular groove arranged around the clean water pipe joint is also provided on one side of the bottom surface of the bottom member, and each pipe hole on the bottom member is connected to the water supply annular groove, and the water supply annular groove is closed by the water supply tank cover, and a raw water pipe joint is also provided on one side of the bottom surface of the water supply tank cover, and the water supply annular groove and the raw water pipe joint constitute the raw water supply channel; a waste water pipe joint connected to the waste water collecting tank is provided on one side of the bottom surface of the bottom member, and the waste water collecting tank and the waste water pipe joint constitute the waste water discharge channel;

[0013] A raw water tank is provided on one side of the top surface of the top component, and each of the pipe holes on the top component is connected to the raw water tank. The supporting component is detachably connected to one side of the top surface of the top component, and the upper end of the photothermal evaporation layer is clamped and fixed between the supporting component and the top component. The inner cavity of the capillary and the raw water tank constitute the raw water delivery channel.

[0014] In a preferred embodiment, a wastewater annular groove is further provided on one side of the bottom surface of the bottom component and is located outside the water supply annular groove. The wastewater annular groove is connected to the wastewater collecting groove. The wastewater annular groove is closed by a wastewater tank cover, and the wastewater pipe joint is arranged on one side of the bottom surface of the wastewater tank cover.

[0015] In a preferred embodiment, an overflow hole is provided on the supporting component.

[0016] In a preferred embodiment, the capillary assembly includes a plurality of capillaries, and the capillaries are dispersedly arranged on the tube rack.

[0017] In a preferred embodiment, the capillary tube is made of stainless steel, aluminum or aluminum alloy, copper or copper alloy.

[0018] In a preferred embodiment, the water-absorbing material is non-woven fabric, viscose fabric or cotton fabric.

[0019] In a preferred embodiment, the photothermal evaporation layer covers the entire inner wall of the vacuum tube.

[0020] In a preferred embodiment, the outer wall of the capillary is provided with spiral grooves or protrusions; and / or the outer wall of the capillary is coated with a plurality of annular hydrophilic coatings and hydrophobic coatings, and the hydrophilic coatings and the hydrophobic coatings are arranged alternately along the axial direction.

[0021] In a second aspect, the present invention also provides a clean water acquisition system based on vacuum tube photothermal evaporation, comprising a raw water pipe, a clean water pipe, a waste water pipe and at least two clean water acquisition devices as described above; a filter is installed on the raw water pipe, and the raw water supply channel in each of the clean water acquisition devices is connected to the raw water pipe, the clean water discharge channel in each of the clean water acquisition devices is connected to the clean water pipe, and the waste water discharge channel in each of the clean water acquisition devices is connected to the waste water pipe.

[0022] By adopting the above technical scheme, the beneficial effect of the present invention is that the technical scheme of the present invention transports the liquid raw water upward to the photothermal evaporation layer through the capillary, and then the liquid water is heated and evaporated in the process of flowing downward in the photothermal evaporation layer, and the evaporated water vapor is condensed into clean water on the outer wall of the capillary, thereby obtaining clean water. Compared with the prior art, the photothermal evaporation of the present invention occurs inside the vacuum tube. The use of the vacuum tube can efficiently convert solar energy into thermal energy, and can make the inside of the vacuum tube achieve a more sustained evaporation temperature, thereby increasing the water evaporation rate on the photothermal evaporation layer; in addition, in the present invention, the condensation of water vapor occurs on the outer wall of the capillary, and the outer side of the capillary is surrounded by the photothermal evaporation layer, and the liquid water continuously flows inside the capillary, so that the outer wall of the capillary can better provide a low-temperature environment suitable for condensation, thereby improving the condensation efficiency of water vapor; when the condensation efficiency and the water evaporation rate are both improved, the efficiency of the clean water acquisition device provided by the present invention in obtaining clean water is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the clean water acquisition device based on vacuum tube photothermal evaporation in the present invention.

[0024] Figure 2 It is a top view of the midsole component of the present invention.

[0025] Figure 3 It is a bottom view of the midsole component of the present invention.

[0026] Figure 4 It is a top view of the top component in the present invention.

[0027] Figure 5 It is a schematic diagram of the support component of the present invention.

[0028] Figure 6 Schematic diagram of the outer wall of the capillary in the second embodiment of the present invention.

[0029] Figure 7 Schematic diagram of the outer wall of the capillary in Example 3 of the present invention.

[0030] Figure 8 It is a schematic diagram of the structure of the clean water acquisition system based on vacuum tube photothermal evaporation in the present invention.

[0031] In the figure: 1-vacuum tube, 101-outer tube, 102-inner tube, 103-vacuum interlayer, 2-photothermal evaporation layer, 3-capillary, 4-top component, 41-raw water tank, 42-threaded hole, 5-bottom component, 51-clean water tank, 52-wastewater collection tank, 53-water supply ring groove, 54-wastewater ring groove, 6-support component, 61-screw perforation, 62-overflow hole, 63-screw, 7-pipe hole, 8-clean water pipe joint, 9-water supply tank cover, 10-raw water pipe joint, 11-wastewater tank cover, 12-wastewater pipe joint, 13-raw water pipe, 14-clean water pipe, 15-wastewater pipe. DETAILED DESCRIPTION

[0032] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are descriptions of the structure of the present invention based on the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0034] The "first" and "second" in this technical solution are only used to distinguish the names of the same or similar structures, or corresponding structures with similar functions, and are not an arrangement of the importance of these structures, nor do they have a ranking, comparison of size, or other meanings.

[0035] In addition, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the two structures. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on the overall idea of ​​the present invention and the specific context of the present solution.

[0036] Embodiment 1

[0037] like Figure 1-5 As shown, an embodiment of the present invention provides a clean water acquisition device based on vacuum tube photothermal evaporation, including a vacuum tube 1, a photothermal evaporation layer 2 and a capillary assembly.

[0038] The vacuum tube 1 is in a cylindrical tube structure, one end of which is closed and the other end is open. When in use, the vacuum tube 1 is arranged roughly in the vertical direction and is allowed to be tilted within a certain angle range, with the closed end located at the top and the open end located at the bottom. The vacuum tube 1 includes an inner tube 102 and an outer tube 101 and a vacuum interlayer 103 enclosed between the inner tube 102 and the outer tube 101. The interior of the vacuum interlayer 103 is in a vacuum state. The vacuum tube 1 is usually made of glass material, for example, configured as a solar vacuum tube.

[0039] The capillary assembly is arranged in the vacuum tube 1, and the capillary assembly penetrates from the lower end of the vacuum tube 1 and is arranged along the axial length direction of the vacuum tube 1. The capillary assembly includes a tube rack and a capillary 3 fixed on the tube rack, and the material of the capillary 3 can be stainless steel, aluminum or aluminum alloy, copper or copper alloy.

[0040] The photothermal evaporation layer 2 is surrounded between the outer side of the capillary assembly and the inner wall of the vacuum tube 1. The photothermal evaporation layer 2 is made of a water-absorbing material, and the upper end of the photothermal evaporation layer 2 is fixedly connected to the upper end of the tube rack. When the vacuum tube 1 is arranged vertically, the photothermal evaporation layer 2 can be arranged between the outer side of the capillary assembly and the inner wall of the vacuum tube 1 in a roughly suspended state.

[0041] In addition, a raw water delivery channel for connecting the capillary 3 and the photothermal evaporation layer 2 is provided at the upper end of the pipe rack; a raw water supply channel for supplying water to the lower end of the capillary 3, a wastewater discharge channel for collecting wastewater discharged from the lower end of the photothermal evaporation layer 2, and a clean water discharge channel for collecting clean water condensed from the outer wall of the capillary 3 are provided at the lower end of the pipe rack.

[0042] In this embodiment, the pipe rack is specifically configured to include a top component 4 , a bottom component 5 and a supporting component 6 .

[0043] The top member 4 and the bottom member 5 are both provided with a tube hole 7 adapted to the capillary 3, and the two ends of the capillary 3 are respectively fixed in the tube holes 7 provided on the top member 4 and the bottom member 5, wherein the tube holes 7 are all stepped holes to prevent the capillary 3 from penetrating the top member 4 and the bottom member 5. It is easy to understand that the number of the capillaries 3 is usually two or more, for example, 20-60, and the capillaries 3 are parallel to each other and roughly aligned, and the capillaries 3 are arranged in a dispersed manner, that is, there is a roughly equal distance between two adjacent capillaries 3. A greater number of capillaries 3 has a greater water transport capacity and a greater condensation capacity.

[0044] The bottom member 5 is generally disc-shaped, and the circumferential side of the bottom member 5 is adapted to the inner wall of the lower end of the vacuum tube 1, so that the bottom member 5 can be sealed and fixed at the inner wall of the lower open end of the vacuum tube 1. In addition, a flange is integrally formed at the lower end of the circumferential side of the bottom member 5 to prevent the bottom member 5 from completely entering the vacuum tube 1.

[0045] A concentrically arranged clean water tank 51 and a waste water collection tank 52 are provided on one side of the top surface of the bottom member 5, wherein the clean water tank 51 is located on the inner side and the waste water collection tank 52 is located on the outer side. It is easy to understand that, since the circumferential side surface of the bottom member 5 is sealed with the inner wall of the vacuum tube 1, the waste water collection tank 52 can also be configured as a stepped tank provided at the outer edge of one side of the top surface of the bottom member 5, so that the inner wall of the vacuum tube 1 is used as the tank wall.

[0046] Each of the pipe holes 7 provided on the bottom member 5 is located in the clean water tank 51. In addition, a clean water pipe joint 8 connected to the clean water tank 51 is integrally formed on one side of the bottom surface of the bottom member 5. The clean water pipe joint 8 is approximately located at the center of the bottom member 5 (i.e., the pipe hole 7 is not provided at the center of the bottom member 5). The clean water pipe joint 8 and the clean water tank 51 together constitute the above-mentioned clean water discharge channel.

[0047] A water supply annular groove 53 is also provided on one side of the bottom surface of the bottom member 5, which is arranged around the clean water pipe joint 8. All the pipe holes 7 provided on the bottom member 5 are connected to the water supply annular groove 53. The water supply annular groove 53 is closed by a water supply tank cover 9. A raw water pipe joint 10 is also provided on one side of the bottom surface of the water supply tank cover 9, such as being integrally formed or bonded. The water supply annular groove 53 and the raw water pipe joint 10 constitute the above-mentioned raw water supply channel. The water supply tank cover 9 is annular and bonded to one side of the bottom surface of the bottom member 5, thereby completely closing the water supply annular groove 53. At the same time, a through hole is provided at the center of the water supply tank cover 9 for the clean water pipe joint 8 to pass through.

[0048] A wastewater annular groove 54 is also provided on one side of the bottom surface of the bottom member 5. The wastewater annular groove 54 is annular and is located outside the water supply annular groove 53. The wastewater annular groove 54 is connected to the wastewater collecting groove 52. The wastewater annular groove 54 is closed by a wastewater groove cover 11. A wastewater pipe joint 12 is also provided on one side of the bottom surface of the wastewater groove cover 11, for example, by bonding or integral molding. Therefore, the wastewater pipe joint 12, the wastewater annular groove 54 and the wastewater collecting groove 52 together constitute the above-mentioned wastewater discharge channel. In addition, it is easy to understand that the wastewater annular groove 54 and the wastewater groove cover 11 are not necessary. The wastewater pipe joint 12 can also be integrally molded and set on one side of the bottom surface of the bottom member 5, and the wastewater pipe joint 12 is directly connected to the wastewater collecting groove 52. At this time, the wastewater collecting groove 52 and the wastewater pipe joint 12 constitute the above-mentioned wastewater discharge channel.

[0049] The top member 4 is also disc-shaped, with a raw water tank 41 provided on one side of the top surface of the top member 4 . Each of the tube holes 7 on the top member 4 is connected to the raw water tank 41 , so that the raw water transported by each capillary tube 3 through capillary action will be collected in the raw water tank 41 .

[0050] The support member 6 is also disc-shaped, and the area of ​​the support member 6 is larger than that of the top member 4. A screw through hole 61 is provided at the center of the support member 6, and a threaded hole 42 is provided at the center of the top surface of the top member 4. The threaded hole 42 is a blind hole, so that the support member 6 can be fixed to one side of the top surface of the top member 4 by means of screws 63, and the raw water tank 41 is closed by the support member 6. It is easy to understand that in order to prevent the raw water from corroding the screws 63, in this embodiment, the raw water tank 41 is configured as an annular water tank, so that there is no direct contact between the threaded hole and the raw water tank 41, thereby protecting the screws 63 screwed in the threaded hole.

[0051] The photothermal evaporation layer 2 is wound in a cylindrical shape and sleeved on the outside of the capillary assembly. The lower end of the photothermal evaporation layer 2 is supported in the wastewater collection tank 52 on one side of the top surface of the bottom component 5, and the upper end of the photothermal evaporation layer 2 is pressed between the support component 6 and the top component 4, so that a section of the upper end of the photothermal evaporation layer 2 can extend into the raw water tank 41, so that the raw water in the raw water tank 41 can be better transported to the upper end of the photothermal evaporation layer 2. Correspondingly, the inner cavity of the capillary 3 and the raw water tank 41 constitute the above-mentioned raw water transport channel. In addition, in order to prevent light from irradiating the capillary 3, the cylindrical photothermal evaporation layer 2 is configured to completely shield the inner wall of the vacuum tube 1 in both the axial and circumferential directions.

[0052] The working process of the clean water acquisition device based on vacuum tube photothermal evaporation provided by the embodiment of the present invention is as follows:

[0053] When in use, the vacuum tube 1 is arranged vertically or slightly inclined, and raw water is transported to the raw water pipe joint 10 through the raw water pipe, and then the raw water enters the water supply ring groove 53 and contacts the lower ends of each capillary 3; under the capillary action, the liquid raw water rises along the capillary 3 and flows from the upper end of the capillary 3 into the raw water tank 41 on one side of the top surface of the top component 4, and then the raw water in the raw water tank 41 is transmitted to the photothermal evaporation layer 2; after the upper end of the photothermal evaporation layer 2 is soaked, the liquid raw water will flow downward along the photothermal evaporation layer 2 under the action of gravity; in the process of raw water flowing on the photothermal evaporation layer 2, the vacuum tube 1 and the photothermal evaporation layer 2 therein will be irradiated by sunlight, so that the light The temperature of the thermal evaporation layer 2 rises, causing the raw water to evaporate due to the heat; since the photothermal evaporation layer 2 is arranged around the capillary assembly, the capillary 3 is not affected by light, and under the cooling of the raw water inside the capillary 3, the capillary 3 will maintain a relatively low temperature, so the water vapor evaporated from the photothermal evaporation layer 2 will condense when it contacts the outer wall of the capillary 3, thereby forming condensed water on the outer wall of the capillary 3. After the condensed water accumulates, it flows downward along the outer wall of the capillary 3 under the action of gravity to the clean water tank 51 on one side of the top surface of the bottom component 5, and then flows out through the clean water pipe joint 8, and the clean water can be collected by the clean water pipe connected to the clean water pipe joint 8. The wastewater flowing out from the lower end of the photothermal evaporation layer 2 will flow into the wastewater collecting groove 52 starting from one side of the top surface of the bottom component 5, and then the wastewater will flow out through the wastewater annular groove 54 and the wastewater pipe joint 12 in sequence, and the wastewater can be discharged through the wastewater pipe connected to the wastewater pipe joint 12, wherein the wastewater includes excess liquid water that has not been fully evaporated and high-concentration liquid water that has been fully evaporated.

[0054] Compared with the prior art, the photothermal evaporation of the present invention occurs inside the vacuum tube 1, and the vacuum tube 1 can efficiently convert solar energy into thermal energy, and can make the inside of the vacuum tube 1 achieve a more sustained evaporation temperature, thereby increasing the water evaporation rate on the photothermal evaporation layer 2. In addition, in the present invention, water vapor condensation occurs on the outer wall of the capillary 3, and the outer side of the capillary 3 is surrounded by the photothermal evaporation layer 2, and the liquid water continuously flows inside the capillary 3, so that the outer wall of the capillary 3 can better provide a low-temperature environment suitable for condensation, thereby improving the condensation efficiency of water vapor. When both the condensation efficiency and the water evaporation rate are improved, the efficiency of the clean water acquisition device provided by the present invention in obtaining clean water is effectively improved.

[0055] It is easy to understand that in order to improve the water evaporation effect, in other preferred embodiments, a holder can be further configured for the photothermal evaporation layer 2. The holder is a hollow cylindrical structure made of metal and is embedded inside when the photothermal evaporation layer 2 is manufactured. The function of the holder is to prevent the cylindrical structure surrounding the photothermal evaporation layer 2 from being deformed and to enable the outer side of the photothermal evaporation layer 2 to better contact with the inner wall of the vacuum tube 1, so that the evaporation effect does not occur on the light-facing side of the photothermal evaporation layer 2, and then the heat is transferred to the shaded side of the photothermal evaporation layer 2 as much as possible, thereby increasing the temperature of the shaded side and improving the water evaporation efficiency of the shaded side.

[0056] It is easy to understand that an overflow hole 62 is also provided on the supporting component 6. In this way, when the raw water in the raw water tank 41 cannot be absorbed by the photothermal evaporation layer 2 in time, the excess raw water can flow out from the overflow hole 62, and a gap is provided between the circumferential side surface of the supporting component 6 and the inner wall of the vacuum tube 1, so that the overflowing raw water can flow downward through the gap and then flow onto the photothermal evaporation layer 2.

[0057] Embodiment 2

[0058] In this embodiment, Figure 6 As shown, the outer wall of the capillary 3 is provided with a spiral protrusion 31, such as an outwardly protruding thread. This arrangement increases the surface area of ​​the outer wall of the capillary 3, and the condensed clean water can still flow down smoothly. Of course, the spiral protrusion 31 can also be replaced by a spiral groove.

[0059] Embodiment 3

[0060] In this embodiment, the outer wall of the capillary 3 is coated with a plurality of annular hydrophilic coatings 32 and hydrophobic coatings 33, and the hydrophilic coatings and the hydrophobic coatings are arranged alternately along the axial direction of the capillary 3, such as Figure 7 shown.

[0061] With such arrangement, since water droplets are not easy to hang on the hydrophobic coating, the tiny water droplets condensed thereon will also slide down, and when sliding through the hydrophilic coating, the tiny water droplets condensed on the hydrophilic coating will be wrapped up and slide down together, and larger water droplets will be formed in the process of continuing to slide down, thereby causing more tiny water droplets on the outer wall of the capillary 3 to be wrapped up and slide down, so that the outer wall of the capillary 3 can be kept in a "clean" state, so that the subsequent water vapor can contact the outer wall of the capillary 3 in time and condense, thereby improving the water vapor condensation efficiency.

[0062] It is easy to understand that the outer wall of the capillary tube 3 may also be synchronously provided with spiral grooves or protrusions, so as to further improve the water vapor condensation efficiency.

[0063] Embodiment 4

[0064] The present invention also provides a clean water acquisition system based on vacuum tube photothermal evaporation, such as Figure 8 As shown, it includes a raw water pipe 13, a clean water pipe 14, a waste water pipe 15 and at least two clean water acquisition devices disclosed in the above embodiments.

[0065] Each clean water acquisition device is fixed by a bracket (not shown in the figure), and the raw water supply channel (i.e., the raw water pipe joint 10) in each clean water acquisition device is connected to the raw water pipe 13 through a branch pipe, so that raw water is supplied to each clean water acquisition device through the raw water pipe 13. Usually, a valve for regulating the water supply rate is also installed on the raw water pipe 13. Among them, a filter for filtering impurities such as sand and dust is also installed on the raw water pipe 13, so that the raw water pipe 13 can filter impurities in advance before supplying raw water to each clean water acquisition device.

[0066] The clean water discharge channel (i.e., the clean water pipe joint 8) in each clean water acquisition device is connected to the clean water pipe 14 through a branch pipe, and the waste water discharge channel (i.e., the waste water pipe joint 12) in each clean water acquisition device is connected to the waste water pipe 15 through a branch pipe.

[0067] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A clean water acquisition device based on vacuum tube photothermal evaporation, characterized in that: The invention comprises a vacuum tube, wherein the vacuum tube comprises an inner tube and an outer tube and a vacuum interlayer sealed between the inner tube and the outer tube; a capillary assembly is arranged in the vacuum tube, wherein the capillary assembly comprises a tube rack and a capillary fixed on the tube rack, and a photothermal evaporation layer made of a water-absorbing material is arranged between the outer side of the capillary assembly and the inner wall of the vacuum tube; the upper end of the photothermal evaporation layer is fixedly connected to the upper end of the tube rack, and the upper end of the tube rack is provided with a raw water conveying channel for connecting the capillary and the photothermal evaporation layer; the lower end of the tube rack is provided with a raw water supply channel for supplying water to the lower end of the capillary, a wastewater discharge channel for collecting wastewater discharged from the lower end of the photothermal evaporation layer, and a clean water discharge channel for collecting clean water condensed from the outer wall of the capillary.

2. The clean water acquisition device according to claim 1, characterized in that: The tube rack includes a top component, a bottom component and a supporting component; the top component and the bottom component are both provided with tube holes adapted to the capillary tube, and the two ends of the capillary tube are respectively fixed in the tube holes provided on the top component and the bottom component; The bottom member is sealed and fixed to the inner wall of the lower end of the vacuum tube, and a clean water tank located inside and a waste water collecting tank located outside are provided on one side of the top surface of the bottom member, and each pipe hole on the bottom member is located in the clean water tank; a clean water pipe joint connected to the clean water tank is provided on one side of the bottom surface of the bottom member, and the clean water tank and the clean water pipe joint constitute the clean water discharge channel; a water supply annular groove arranged around the clean water pipe joint is also provided on one side of the bottom surface of the bottom member, and each pipe hole on the bottom member is connected to the water supply annular groove, and the water supply annular groove is closed by a water supply tank cover, and a raw water pipe joint is also provided on one side of the bottom surface of the water supply tank cover, and the water supply annular groove and the raw water pipe joint constitute the raw water supply channel; a waste water pipe joint connected to the waste water collecting tank is provided on one side of the bottom surface of the bottom member, and the waste water collecting tank and the waste water pipe joint constitute the waste water discharge channel; A raw water tank is provided on one side of the top surface of the top component, and each of the pipe holes on the top component is connected to the raw water tank. The supporting component is detachably connected to one side of the top surface of the top component, and the upper end of the photothermal evaporation layer is clamped and fixed between the supporting component and the top component. The inner cavity of the capillary and the raw water tank constitute the raw water delivery channel.

3. The clean water acquisition device according to claim 2, characterized in that: A wastewater annular groove is also provided on one side of the bottom surface of the bottom component, which is located outside the water supply annular groove. The wastewater annular groove is connected to the wastewater collecting groove. The wastewater annular groove is closed by a wastewater groove cover, and the wastewater pipe joint is arranged on one side of the bottom surface of the wastewater groove cover.

4. The clean water acquisition device according to claim 2, characterized in that: An overflow hole is provided on the supporting component.

5. The clean water acquisition device according to claim 1, characterized in that: The capillary assembly comprises a plurality of capillaries, and the capillaries are dispersedly arranged on the tube rack.

6. The clean water obtaining device according to claim 1, characterized in that: The capillary tube is made of stainless steel, aluminum or aluminum alloy, copper or copper alloy.

7. The clean water acquisition device according to claim 1, characterized in that: The water-absorbing material is non-woven fabric, viscose fiber fabric or cotton fabric.

8. The clean water obtaining device according to claim 1, characterized in that: The photothermal evaporation layer covers the inner wall of the vacuum tube.

9. The clean water acquisition device according to any one of claims 1 to 8, characterized in that: The outer wall of the capillary is provided with a spiral groove or protrusion; and / or the outer wall of the capillary is coated with a plurality of annular hydrophilic coatings and hydrophobic coatings, and the hydrophilic coatings and the hydrophobic coatings are arranged alternately and spaced along the axial direction.

10. A clean water acquisition system based on vacuum tube photothermal evaporation, characterized in that: It comprises a raw water pipe, a clean water pipe, a waste water pipe and at least two clean water acquisition devices as described in any one of claims 1 to 9; a filter is installed on the raw water pipe, the raw water supply channel in each of the clean water acquisition devices is connected to the raw water pipe, the clean water discharge channel in each of the clean water acquisition devices is connected to the clean water pipe, and the waste water discharge channel in each of the clean water acquisition devices is connected to the waste water pipe.

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