A water collector blade based on a separation membrane, a water collector, and a cooling tower

Abstract

The present invention relates to the technical field of water vapor recovery and utilization in power plants and chemical plant cooling towers. More specifically, it relates to a water collector blade based on a separation membrane, a water collector, and a cooling tower. Among them, a water collector blade based on a separation membrane includes a hydrophilic device. On the outer side of the hydrophilic device, a separation membrane with hydrophilic and hydrophobic functions is movably provided. The side of the separation membrane with hydrophilic function is in contact with the hydrophilic device, and the side of the separation membrane with hydrophobic function faces away from the hydrophilic device. Liquid droplets can pass through the separation membrane and enter the hydrophilic device. The present invention provides a water collector blade based on a separation membrane. The hydrophilic device provided in the water collector blade collects moisture from the airflow flowing through the hydrophilic device, and the separation membrane with opposite wettability physical properties provided outside the hydrophilic device collects moisture from the airflow flowing outside the water collector blade, maximizing the water vapor recovery rate and reducing the phenomenon of liquid droplet secondary entrainment.

Description

Technical Field

[0001] The present invention relates to the technical field of water vapor recovery and utilization in power plants and chemical plant cooling towers, and more specifically, to a water collector blade, a water collector, and a cooling tower based on a separation membrane. Background Art

[0002] Cooling towers are widely used in industries such as electric power, chemical industry, petroleum, and metallurgy, and are important devices for completing the cooling of circulating water. However, during the operation of open cooling towers, various water losses always occur, such as windage loss and evaporation loss. For power plants, evaporation loss and windage loss account for 30% - 70% of the total water consumption of the power plant, and the water loss is serious. According to statistics, the water loss of a 600MW thermal power plant is as high as 1000t / h, and the direct economic loss per year reaches more than 14 million yuan. It can be seen that water conservation in cooling towers has important value for the entire industrial water conservation process. The existing water collectors have unsatisfactory water collection effects, relatively serious secondary entrainment phenomena of droplets, and poor removal effects on tiny droplets, making it difficult to meet the emission standards and the requirements of energy conservation and emission reduction. In addition, since the airflow carrying droplets enters the air outside the tower, it will cause a large amount of water consumption.

[0003] For example, Chinese Patent CN201407949Y discloses a water collector blade for a cooling tower. The cross-section of the blade body is in an S-shaped curve, and convex strips are provided on the surface of the blade body to block and partition the high-speed water-carrying airflow, so as to prevent water droplets from rushing out of the water collector along the airflow and play a role in water collection. This structure can reduce water loss to a certain extent, but it is not convenient for the airflow to pass through, and at the same time, it cannot fundamentally solve the problem of secondary entrainment of droplets.

[0004] Chinese Patent CNl060l795B discloses an energy-saving cooling tower water collector without a fan. Through a water guiding member, water vapor condenses into water flow on a fixed water guiding plate, and then is guided away through a plurality of water guiding holes. Using water vapor to spontaneously condense into water flow takes a long time on the one hand, and on the other hand, it cannot well avoid the secondary entrainment phenomenon of droplets, and the water vapor will be lost along with the gas, making it difficult to ensure the water vapor recovery rate and recovery efficiency.

[0005] Chinese Patent CN201104149Y discloses a device for recovering water vapor in a cooling tower without power. A net-shaped water collector made of sponge or fiber fabric is used to replace the traditional corrugated water collector, and a cooling pool for further cooling the cooling water is added, which can improve the water vapor recovery rate to a certain extent. However, as the sponge gets wet, the water collection capacity will drop significantly. Therefore, long-term use will aggravate the secondary entrainment phenomenon of droplets or increase the labor and material costs for sponge replacement. Summary of the Invention

[0006] The object of the present invention is to overcome the deficiencies of the prior art and provide a water collector blade based on a separation membrane. The hydrophilic device provided in the water collector blade collects the entrained droplets in the air flow passing through the hydrophilic device, and the separation membrane with opposite wettability physical properties provided outside the hydrophilic device collects the entrained droplets in the air flow passing by outside the water collector blade, maximizing the recovery rate of the entrained droplets in the air flow and reducing the phenomenon of secondary entrainment of droplets. The present invention has high recovery efficiency, a simple structure, and does not affect the recovery rate of droplets during long-term use, and there is no need for frequent replacement of parts.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is:

[0008] Provide a water collector blade based on a separation membrane, including a hydrophilic device that uses a hydrophilic component to collect entrained droplets in the air flow when the air flow passes through. A separation membrane with hydrophilic and hydrophobic functions is movably provided outside the hydrophilic device. The side of the separation membrane with hydrophilic function is in contact with the hydrophilic device, and the side of the separation membrane with hydrophobic function faces away from the hydrophilic device. The droplets can pass through the separation membrane and enter the hydrophilic device.

[0009] The hydrophilic device of the present invention is used to provide support for the separation membrane, and uses hydrophilic components to collect most of the entrained droplets in the air flow flowing through the hydrophilic device; one side of the separation membrane has a hydrophilic function, that is, it has a great affinity for water and can attract droplets; the other side has a hydrophobic function, that is, it repels water, and when water contacts the surface of the hydrophobic side of the separation membrane, a large contact angle will be formed and the water will be in the shape of a water droplet. Therefore, under the drive of the surface chemical potential, the water droplet can be quickly "pulled" to the hydrophilic side, thus realizing spontaneous transmembrane transport, achieving directional permeability, and this process is irreversible. When the air flow outside the water collector blade collides with the hydrophobic side of the separation membrane, the water vapor is condensed into water droplets, which are then absorbed by the water-absorbing side of the separation membrane and gather in the hydrophilic device. Therefore, the water collector blade of the present invention can not only collect the droplets entrained by the air flow entering the hydrophilic device, but also collect the droplets entrained by the air flow outside the hydrophilic device, achieving multiple guarantees, comprehensively and efficiently collecting water in all directions, and at the same time reducing the secondary entrainment phenomenon of droplets; setting the separation membrane outside the hydrophilic device means setting the separation membrane on the two sides with a larger cross-sectional area outside the hydrophilic device, keeping the top and bottom surfaces of the hydrophilic device and the two side surfaces with a smaller cross-sectional area outside the hydrophilic device exposed. Of course, the purpose of setting the hydrophilic side of the separation membrane close to the outside of the hydrophilic device and the hydrophobic side away from the outside of the hydrophilic device is to collect the droplets outside the water collector blade inside the water collector blade to the greatest extent and discharge them in time, preventing the droplets in the air flow from flowing out of the tower with the air flow and causing water loss. The present invention uses the opposite wettability of the separation membrane to achieve the purpose of improving the droplet recovery rate, with a simple structure, and the properties of the separation membrane are different from those of the sponge in the prior art. Long-term use does not affect the hydrophilic and hydrophobic properties of the separation membrane, so it does not affect the water vapor recovery rate and does not require frequent replacement of parts.

[0010] Preferably, the separation membrane is a Janus membrane, and the Janus membrane includes a first layer membrane with a hydrophilic function and a second layer membrane with a hydrophobic function, and the first layer membrane and the second layer membrane are closely adhered.

[0011] Preferably, the thickness of the first layer membrane is different from the thickness of the second layer membrane.

[0012] Preferably, the hydrophilic device is a hydrophilic metal wire mesh.

[0013] Preferably, the separation membrane is adhered to both sides of the hydrophilic metal wire mesh, and connection holes are also provided on the separation membrane.

[0014] Preferably, the distance between the two separation membranes on both sides of the hydrophilic metal wire mesh is 5 mm to 30 mm.

[0015] The present invention also provides a water collector for a cooling tower based on a separation membrane, which includes a plurality of water collector blades based on the separation membrane as described above, and a fixing device for connecting the plurality of water collector blades and for fixing the water collector in the cooling tower. The plurality of water collector blades are arranged in a staggered manner and partially overlapped on the fixing device, and the water collector blades are connected to the fixing device.

[0016] Preferably, the fixing device is a connecting rod, and the connecting rod passes through the connecting hole to connect with the water collector blade. Each water collector blade is arranged parallel to each other, and the parallel distance between two adjacent water collector blades is 15 mm to 25 mm.

[0017] Preferably, the water collector blade is in a folded line shape or a snake shape.

[0018] The present invention also provides a cooling tower based on a separation membrane, which includes a cooling tower body. An air inlet and an air outlet are provided on the cooling tower body. A spraying device is provided inside the cooling tower body. A water collector for a cooling tower based on the separation membrane as described above is provided between the air outlet and the spraying device; the air flow enters the cooling tower body from the air inlet and then flows through the spraying device and the water collector in sequence and then flows out from the air outlet.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] (1) The Janus membrane in the water collector blade of the present invention can realize the automatic capture of droplets in the air flow and the rapid transmembrane transportation, effectively increasing the capture efficiency of the water collector for droplets in the air flow, significantly reducing the liquid layer thickness on the membrane, and effectively reducing the probability of secondary entrainment of droplets.

[0021] (2) The hydrophilic metal wire mesh modified by an organic solvent used in the water collector blade of the present invention can greatly increase the capture efficiency of the water collector for micro-droplets, and protect the fan and downstream devices to a certain extent.

[0022] (3) The water collector of the present invention does not require additional energy consumption and supporting auxiliary machines, has a simple structure, is convenient for installation and maintenance, has a low cost, saves water and energy, is environmentally friendly and economical, and is an ideal structure for the existing water collectors of cooling towers.

[0023] (4) The water collector of the present invention is placed in the cooling tower, effectively increasing the recovery rate of droplets entrained in the hot and humid air flow, and does not affect the outflow of hot and humid air above the packing.

[0024] (5) For the cooling tower of the present invention, the water collected by the water collector can be directly dripped into the liquid collection pool for recycling, thereby reducing the number of times of circulating water makeup. Description of the Drawings

[0025] Figure 1Schematic structural diagram of a water collector blade based on a separation membrane according to the present invention;

[0026] Figure 2 Schematic structural diagram of a cooling tower water collector based on a separation membrane according to the present invention;

[0027] Figure 3 Schematic structural diagram of a cooling tower based on a separation membrane according to the present invention;

[0028] The illustration markings are explained as follows:

[0029] 1. Hydrophilic device; 11. Connecting hole; 2. Separation membrane; 3. Water collector blade; 4. Fixing device; 5. Separation membrane channel; 6. Cooling tower body; 61. Air inlet; 62. Air outlet; 7. Spraying device; 8. Water collector.

[0030] The arrow direction in the figure indicates the air flow direction. Specific embodiments

[0031] The present invention will be further described below in conjunction with specific embodiments. Among them, the drawings are only for illustrative purposes, showing only schematic diagrams rather than actual drawings, and should not be construed as limitations on this patent; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, and do not represent the dimensions of actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limitations on the present invention.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0036] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0037] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations of the present invention, and those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0038] Obviously, the above embodiments of the present invention are merely examples given for clearly illustrating the present invention and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to list all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

[0039] Example 1

[0040] As Figure 1 shown in the embodiment of the water collector blade based on the separation membrane of the present invention, which includes a hydrophilic device 1 that uses hydrophilic components to collect the liquid droplets entrained in the air flow when the air flow passes through. A separation membrane 2 with hydrophilic and hydrophobic functions is movably arranged outside the hydrophilic device 1. The side of the separation membrane 2 with hydrophilic function is adhered to the hydrophilic device 1, and the side of the separation membrane 2 with hydrophobic function faces away from the hydrophilic device 1. The liquid droplets can pass through the separation membrane 2 and enter the hydrophilic device 1.

[0041] As an embodiment of the present invention, the separation membrane 2 is a Janus membrane. The Janus membrane includes a first layer membrane with hydrophilic function and a second layer membrane with hydrophobic function, and the first layer membrane and the second layer membrane are closely adhered.

[0042] The hydrophilic function is hydrophilicity, and the hydrophobic function is hydrophobicity. Hydrophilicity and hydrophobicity are collectively referred to as having opposite wettabilities. Specifically, the opposite wettability of the membrane can be achieved in two ways: one way is to use two materials with opposite wettabilities, and the other way is to use porous membranes uniformly. After different hydrophilic and hydrophobic modifications are carried out on the porous membranes to obtain a first layer membrane and a second layer membrane with opposite wettabilities, the two layers of membranes are then synthesized by electrospinning or precise bonding methods. Here, it can be that the first layer membrane has hydrophilicity and the second layer membrane has hydrophobicity, or the first layer membrane has hydrophobicity and the second layer membrane has hydrophilicity. The closely adhered first layer membrane and second layer membrane can facilitate the directional membrane penetration of water droplets. The membrane with hydrophilicity adsorbs the water droplets on the surface of the membrane with hydrophobicity, and the water droplets are recovered to the inner side of the membrane with hydrophilicity. The hydrophilic and hydrophobic sides of the Janus membrane endow it with the performance of directional penetration, enabling it to be applied to fog collection and effectively preventing the occurrence of secondary entrainment of liquid droplets. In addition, since the liquid droplets penetrate relatively quickly on the surface of the Janus membrane, the thickness of the liquid layer on the membrane surface is significantly reduced, which helps to improve the capture efficiency of liquid droplets. This water collector blade does not affect the outflow of the hot and humid air above the cooling tower and can significantly improve the recovery efficiency of fog droplets.

[0043] As an embodiment of the present invention, the thickness of the first layer membrane is different from the thickness of the second layer membrane.

[0044] The first layer membrane and the second layer membrane with different thicknesses are beneficial to improving the penetration efficiency of water droplets. Whether the thickness of the first layer membrane with hydrophilicity is greater than the thickness of the second layer membrane with hydrophobicity, or the thickness of the second layer membrane with hydrophobicity is greater than the thickness of the first layer membrane with hydrophilicity, as long as there is a thickness difference between the two membranes with opposite wettabilities, it is beneficial to improve the adsorption capacity of the hydrophilic membrane, and it is easier to adsorb the water droplets from the second layer membrane to the first layer membrane.

[0045] As an embodiment of the present invention, the hydrophilic device 1 is a hydrophilic metal wire mesh.

[0046] The hydrophilic metal wire mesh has hydrophilic properties and is used to collect droplets in the airflow when the airflow passes through. Specifically, the hydrophilic metal wire meshes are all hydrophilic metal wire meshes modified by organic solvents. For example: the copper mesh cleaned in an acetone and ethanol solution is immersed in an HS(CH2)11OH ethanol solution for soaking, a nano-porous structure is formed by corrosion on the surface of the copper mesh, and then it is rinsed clean with ethanol and hydroxyl thiol is modified and assembled on the surface of the copper mesh. The material of the hydrophilic metal wire mesh can be any one of copper, aluminum, nickel, titanium, etc.

[0047] As an embodiment of the present invention, the separation membrane 2 is adhered to both sides of the hydrophilic metal wire mesh, and connection holes 11 are also provided on the separation membrane 2.

[0048] The hydrophilic metal wire mesh provides support for the separation membrane 2, and a good connection is achieved between the separation membrane 2 and the hydrophilic metal wire mesh through an adhesive method, with reliable and simple connection. The connection holes 11 are used for the connection device to pass through to achieve the connection between the respective water collector blades 3.

[0049] As an embodiment of the present invention, the separation membrane 2 covers the two side surfaces with the largest area of the hydrophilic metal wire mesh.

[0050] The separation membrane 2 only covering the two side surfaces with the largest area of the hydrophilic metal wire mesh can reduce the influence on the airflow velocity, enabling most of the airflow to flow smoothly through the inside of the hydrophilic metal wire mesh; of course, the separation membrane 2 is breathable and can also cover all the surfaces of the hydrophilic metal wire mesh, that is, the separation membrane 2 wraps the entire hydrophilic metal wire mesh from the outside, increasing the contact area between the separation membrane 2 and the airflow, sacrificing part of the droplet recovery efficiency in exchange for improving the droplet recovery rate.

[0051] As an embodiment of the present invention, the distance between the two separation membranes 2 on both sides of the hydrophilic metal wire mesh is 5 mm to 30 mm.

[0052] A certain spacing is maintained between the separation membranes 2, which ensures that a certain spacing is maintained between the hydrophilic metal wire meshes. This is beneficial for forming a stable air flow channel between the two separation membranes 2, ensuring that the air flow can pass smoothly. If the spacing between the separation membranes 2 is too large, the humid and hot air flow will pass through the hydrophilic metal wire mesh too fast. Since the collection efficiency of the hydrophilic metal wire mesh for water vapor is fixed, it is easy to increase the burden on the hydrophilic metal wire mesh for droplet absorption and reduce the droplet recovery rate. If the spacing between the separation membranes 2 is too small, it is not conducive to the rapid and unobstructed passage of the air flow, affecting the water collection rate of the hydrophilic metal wire mesh. Therefore, a spacing of 5 mm to 30 mm between the two separation membranes 2 can be used as a reference value. Further, the spacing between the two separation membranes 2 is adjusted to 10 mm to 20 mm, so that the spacing of the hydrophilic metal wire mesh channel is maintained between 10 mm and 20 mm, achieving the optimal configuration of the water collection effect between the hydrophilic metal wire mesh and the separation membrane 2.

[0053] Example 2

[0054] As Figure 2 As shown in the figure, this is an example of a cooling tower water collector based on a separation membrane according to the present invention, including a plurality of water collector blades 3 based on the separation membrane 2 as described above, and a fixing device 4 for connecting the plurality of water collector blades 3 and for fixing the water collector 8 in the cooling tower. The plurality of water collector blades 3 are arranged in sequence and staggeredly and partially overlap on the fixing device 4. The water collector blades 3 are connected to the fixing device 4, and a separation membrane channel 5 is formed between adjacent water collector blades 3.

[0055] The fixing device 4 is used to connect a plurality of water collector blades 3 based on the separation membrane 2 as described above in sequence, forming a water collector 8 composed of a plurality of water collector blades 3. The hydrophilic metal wire mesh inside each water collector blade 3 and the separation membrane 2 with hydrophilic and hydrophobic properties outside the hydrophilic metal wire mesh are used to collect droplets in the humid and hot air flow.

[0056] Part of the humid and hot air flow enters the hydrophilic metal wire mesh channel. The droplets hit the hydrophilic metal wire mesh and are adhered and trapped. Another part enters the separation membrane channel 5. The gap between two water collector blades 3 forms the separation membrane channel 5 composed of the separation membrane 2 outside the hydrophilic device 1. Due to inertia, the droplets will hit the separation membrane 2 on the surface of the water collector 8. Since both sides of the separation membrane channel 5 are hydrophobic membranes and the side close to the hydrophilic metal wire mesh is a hydrophilic membrane, after the droplets hit the hydrophobic membrane, due to the hydrophobic effect and the surface tension of water, the water droplets will form a sphere, squeezing some of the droplets in contact with the separation membrane 2 into the small holes on the membrane. The other end of the small hole is hydrophilic, so under the drive of the surface chemical potential, the water droplets are quickly "pulled" to the hydrophilic side, thus realizing spontaneous transmembrane transport, and this process is irreversible; the water droplets finally converge inside the hydrophilic device 1. The water collector blades 3 have a significant effect on the recovery of droplets in the air flow. Coupled with the efficient trapping of micro-droplets by the hydrophilic metal wire mesh, the automatic trapping of droplets by the separation membrane 2 and the rapid transmembrane transport, the practicability and effectiveness of the water collector 8 are greatly increased.

[0057] The water collector blades 3 arranged staggeredly and partially overlapped can, during the flow of the humid and hot air flow, use the separation membrane 2 outside the water collector blades 3 to block the air flow and collect the water droplets, causing the humid and hot air flow to condense into droplets when hitting the hydrophobic surface of the separation membrane 2. The partially overlapped water collector blades 3 can form multiple blockages in the gas flow path, equivalent to forming multiple guarantees during the droplet collection process, collecting as much water in the air flow as possible and minimizing the secondary entrainment of droplets when the gas flows out. After the humid and hot air flow rich in droplets passes through the above-mentioned water collector 8, the recovery of floating droplets can reach more than 95%. If only an ordinary corrugated plate water collector is used, only 80%-90% of the floating droplets can be recovered, and the occurrence of secondary entrainment of droplets cannot be prevented. Compared with the ordinary corrugated plate water collector, the present invention has an additional process of secondary collection of water vapor inside the water collector blades 3, so the present invention has important significance for water conservation; and the present invention does not need to install an additional fan, reducing equipment investment and operating costs, and the investment cost of the present invention is low, and it is convenient for maintenance and installation.

[0058] As an embodiment of the present invention, the fixing device 4 is a connecting rod. The connecting rod passes through the connecting holes 11 provided on the separation membrane to connect with the water collector blades 3. Each water collector blade 3 is arranged parallel to each other, and the parallel distance between two adjacent water collector blades 3 is 15 mm to 25 mm.

[0059] On the one hand, the connecting rod serves as the fixing device 4 to fix the water collector 8 in the cooling tower. On the other hand, it serves as the connecting device to connect each water collector blade 3 to form an orderly and unified whole. The water collector blades 3 are arranged in parallel with each other, which not only conforms to the principle of simple installation but also looks more beautiful and is practical at the same time. The parallel spacing between two adjacent water collector blades 3 is set to 15 mm to 25 mm, which is considered for the convenience of collecting liquid droplets from the gas flowing through the gap between the two water collector blades 3 and the separation membrane channel 5. If the spacing is too large, it is easy to cause the liquid droplets entrained in the air flow between the separation membrane channels 5 to not be effectively collected, resulting in water loss; if the spacing is too small, more water collector blades 3 will be consumed within the same length, causing waste of materials and an increase in cost. As long as the water collection effect is ensured, the spacing between adjacent water collector blades 3 can be appropriately widened to reduce unnecessary waste. Specifically, the aperture of the connecting hole 11 can be 5 mm to 8 mm, and the connecting rod can be a screw rod, and fixing nuts are screwed at both ends of the screw rod close to the water collector blade 3 for fixing the water collector blade 3 on the screw rod.

[0060] As an embodiment of the present invention, the water collector blade 3 is in a zigzag or serpentine shape.

[0061] On the one hand, the water collector blade 3 is used to collect liquid droplets from the air flow flowing through the water collector blade 3. On the other hand, it collects liquid droplets from the air flow flowing outside the water collector blade 3, further improving the water recovery rate. The water collector blade 3 being in a zigzag or serpentine shape can form multiple barriers in the air flow passage, increasing the contact area and impact rate between the air flow and the hydrophobic surface of the separation membrane 2, and improving the water recovery rate. Within the knowledge of those skilled in the art, the surface of the water collector blade 3 can also be trapezoidal, parallelogram-shaped, or other shapes.

[0062] Embodiment 3

[0063] As Figure 3 As shown in the figure, an embodiment of a cooling tower based on a separation membrane according to the present invention includes a cooling tower body 6, with an air inlet 61 and an air outlet 62 provided on the cooling tower body 6. The air inlet 61 is arranged at the lower part of the cooling tower body 6, and the air outlet 62 is arranged at the top of the cooling tower body 6. A spraying device 7 is provided inside the cooling tower body 6, and a water collector 8 of the cooling tower based on the separation membrane as described above is provided between the air outlet 62 and the spraying device 7; the air flow enters the cooling tower body 6 from the air inlet 61 and then flows through the spraying device 7 and the water collector 8 in sequence and flows out from the air outlet 62.

[0064] The cooling tower body 6 provides a cooling place; the spraying device 7 realizes the functions of filtration and cooling, but it will cause a lot of moisture to be mixed in the waste gas; the cooling tower water collector 8 based on the separation membrane 2 can collect the moisture in the waste gas, improve the recovery rate of moisture, reduce the secondary entrainment of droplets, reduce water consumption, and ultimately achieve the dual purposes of energy conservation and environmental protection. The water collector 8 is placed in the cooling tower, which can effectively increase the recovery rate of the droplets entrained in the humid and hot air flow, and does not affect the outflow of the humid and hot air above the packing. The air inlet 61 is used for the waste gas to flow into the cooling tower, and the air outlet 62 is used for the discharge of the treated waste gas. The cooling tower of the present invention uses the cooling tower water collector 8 based on the separation membrane 2, and has a better moisture recovery function than the ordinary cooling tower.

[0065] As an embodiment of the present invention, a liquid collecting pool is arranged at the bottom of the cooling tower body 6.

[0066] The water collected by the water collector 8 can directly drip into the liquid collecting pool for recycling, thereby reducing the number of times of replenishing the circulating water.

[0067] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A cooling tower water collector based on a separation membrane, characterized in that: It comprises a water collector blade (3) based on a separation membrane, and a fixing device (4) for connecting a plurality of water collector blades (3) and for fixing the water collector (8) in a cooling tower, wherein a plurality of water collector blades (3) are arranged in a staggered manner on the fixing device (4) and partially overlap in the direction of the wet and hot air flow, and the water collector blades (3) are connected to the fixing device (4); The water collector blade (3) based on the separation membrane includes a hydrophilic device (1) that uses a hydrophilic component to collect droplets entrained in the air flow when the air flow passes through. A separation membrane (2) with hydrophilic and hydrophobic functions is movably provided on the outside of the hydrophilic device (1), and the separation membrane (2) covers the two side surfaces with larger areas of the hydrophilic device (1). The side of the separation membrane (2) with the hydrophilic function is in contact with the hydrophilic device (1), and the side of the separation membrane (2) with the hydrophobic function is away from the hydrophilic device (1). The droplets can pass through the separation membrane (2) and enter the hydrophilic device (1); the separation membrane (2) is a Janus membrane, and the Janus membrane includes a first membrane with a hydrophilic function and a second membrane with a hydrophobic function, and the first membrane and the second membrane are in close contact. The thickness of the first film is different from the thickness of the second film.

2. The cooling tower water collector based on separation membrane according to claim 1, characterized in that: The hydrophilic device (1) is a hydrophilic metal wire mesh.

3. The cooling tower water collector based on separation membrane according to claim 2, characterized in that: The separation membrane (2) is adhered to both sides of the hydrophilic metal mesh, and a connection hole (11) is also provided on the separation membrane (2).

4. The cooling tower water collector based on separation membrane according to claim 3, characterized in that: The spacing between the separation membranes (2) on both sides of the hydrophilic metal mesh is 5 mm to 30 mm.

5. The cooling tower water collector based on separation membrane according to claim 3, characterized in that: The fixing device (4) is a connecting rod, which passes through the connecting hole (11) and is connected to the water collector blades (3). The water collector blades (3) are arranged parallel to each other, and the parallel spacing between two adjacent water collector blades (3) is 15 mm to 25 mm.

6. The cooling tower water collector based on separation membrane according to claim 1 or 5, characterized in that: The water collector blades (3) are in a broken line shape or a snake shape.

7. A cooling tower based on a separation membrane, characterized in that: The invention comprises a cooling tower body (6), an air inlet (61) and an air outlet (62) are provided on the cooling tower body (6), a spray device (7) is provided in the cooling tower body (6), and a cooling tower water collector (8) based on a separation membrane as claimed in any one of claims 1 to 6 is provided between the air outlet (62) and the spray device (7); the air flow enters the cooling tower body (6) from the air inlet (61), flows through the spray device (7) and the water collector (8) in sequence, and then flows out from the air outlet (62).

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