阅读说明：本技术 一种用于冷却塔的仿生凝水装置 (Bionic water condensing device for cooling tower ) 是由 陈清林 汤涯 吴志勇 张冰剑 何畅 彭敏仪 于 2019-08-27 设计创作，主要内容包括：本发明公开了一种用于冷却塔的仿生凝水装置,每组波纹板的外表面设置有超疏水涂层作为疏水基底,其上间隔排列有多个半球状凸起,所有半球状凸起的表面均设置有超亲水涂层；且在每两排半球状凸起之间的疏水基底表面均设置有排水凹槽,以及在每组波纹板的底部还设置有集水凹槽,排水凹槽和集水凹槽的内表面也均设置有超疏水涂层；由于采用了仿生纳米布沙漠甲虫背部凸凹交替结构的波纹板,结合亲疏水涂层的应用,明显增加了湿热空气中水蒸气的回收率,有效降低了出口气体的湿度,大大减少了蒸发损失,达到了凝水消雾的目的；投资成本低,结构简单,无额外功耗,既能回收蒸发水又能回收飘滴,凝水消雾效果更好,明显减少了白烟排放,节能环保。(The invention discloses a bionic water condensing device for a cooling tower, wherein a super-hydrophobic coating is arranged on the outer surface of each group of corrugated plates to serve as a hydrophobic substrate, a plurality of hemispherical bulges are arranged on the super-hydrophobic coating at intervals, and super-hydrophilic coatings are arranged on the surfaces of all the hemispherical bulges; the surface of the hydrophobic substrate between every two rows of hemispherical bulges is provided with a drainage groove, the bottom of each group of corrugated plates is also provided with a water collecting groove, and the inner surfaces of the drainage groove and the water collecting groove are also provided with a super-hydrophobic coating; due to the adoption of the corrugated plate with the bionic nano brown beetle back convex-concave alternating structure and the application of the hydrophilic-hydrophobic coating, the recovery rate of water vapor in hot and humid air is obviously increased, the humidity of outlet gas is effectively reduced, evaporation loss is greatly reduced, and the purposes of condensing water and eliminating fog are achieved; the device has the advantages of low investment cost, simple structure, no extra power consumption, capability of recovering evaporated water and floating drops, better condensed water fog dissipation effect, obvious reduction of white smoke emission, energy conservation and environmental protection.)

1. A bionic water condensing device for a cooling tower is characterized by being installed inside the cooling tower and located between a top outlet fan and a spraying device; the bionic water condensing device comprises a fixed support and a plurality of groups of corrugated plates, wherein each group of corrugated plates consists of two corrugated plates, and the plurality of groups of corrugated plates are arranged in parallel at equal intervals in a frame consisting of the fixed support; the two outer surfaces of each group of corrugated plates are respectively provided with a super-hydrophobic coating as a hydrophobic substrate, a plurality of hemispherical bulges are arranged on the hydrophobic substrate at intervals, and the surfaces of all the hemispherical bulges are respectively provided with a super-hydrophilic coating; and the surface of the hydrophobic substrate between every two rows of hemispherical bulges is provided with a drainage groove, the bottom of each group of corrugated plates is also provided with a water collecting groove, and the inner surfaces of the drainage groove and the water collecting groove are also provided with super-hydrophobic coatings.

2. The biomimetic water condensation device for a cooling tower according to claim 1, characterized in that: three adjacent hemispherical bulges are uniformly distributed in a triangular shape on the hydrophobic substrate.

3. The biomimetic water condensation device for a cooling tower according to claim 2, characterized in that: three adjacent hemispherical bulges are uniformly distributed on the hydrophobic substrate in a regular triangle shape.

4. The bionic water condensing device for the cooling tower as claimed in claim 1, wherein the diameter of the hemispherical protrusions is 0.5 ~ 1.0.0 mm, and the distance between two adjacent hemispherical protrusions is 0.5 ~ 1.5.5 mm.

5. The bionic water condensing device for the cooling tower of claim 1 is characterized in that the distance between two corrugated plates in each group of corrugated plates is 5-12mm, and the distance between two adjacent groups of corrugated plates is 20 ~ 40 mm.

6. The biomimetic water condensation device for a cooling tower according to claim 1, characterized in that: each group of corrugated plates is in a broken line plate shape, an S-shaped curved surface plate shape or a trapezoid plate shape.

7. The biomimetic water condensation device for a cooling tower according to claim 1, characterized in that: each group of corrugated plates is made of copper, aluminum, polyvinyl chloride or polypropylene materials into a plate shape.

8. The biomimetic water condensation device for a cooling tower according to claim 1, characterized in that: the super-hydrophilic coating is a micro-nano composite coating consisting of polyacrylic acid, a short linear fluorine chain surfactant and a polar hydrophilic group, or a transparent super-hydrophilic titanium dioxide nano coating.

9. The biomimetic water condensation device for a cooling tower according to claim 1, characterized in that: the super-hydrophobic coating is a composite polymer material coating consisting of polytetrafluoroethylene and polyphenylene sulfide, or a silicon dioxide nano material coating.

10. The utility model provides a cooling tower, includes body of the tower, top export fan spray set and receives the hydrophone, the top export fan is installed at the top of body of the tower, spray set and receive the hydrophone and all install the inside at the body of the tower, just receive the hydrophone and be located between top export fan and the spray set, its characterized in that: the water collector is provided with the bionic water condensing device for the cooling tower as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to the field of industrial and civil cooling equipment, in particular to a bionic water condensing device for a cooling tower.

Background

Cooling towers are important devices in circulating water cooling systems and are generally divided into open cooling towers and closed cooling towers; compare in open cooling tower, the high temperature working medium of closed cooling tower flows in the coil to avoid working medium to be sprayed cooling water and air pollution, thereby can guarantee working medium's cleanness, in addition because the dividing wall type heat transfer of closed cooling tower, cooling capacity can be less than open cooling tower, and the working medium evaporation loss who brings also can be less than open cooling tower, so open cooling tower water recovery latent energy will be greater than closed cooling tower.

The cooling water loss in the circulating water cooling system mainly comes from a cooling tower, and mainly comprises evaporation loss, blowing loss and pollution discharge loss, wherein the evaporation loss is the water quantity evaporated into the air when the circulating cooling water is in direct contact with the air for heat exchange, the water loss of the water is about 1.2% ~ 1.6.6% of the total circulating water, the blowing loss is small water drops blown out of the tower by the air due to the suction force of an air duct, the drifting water quantity accounts for about 0.2% ~ 0.5.5% of the circulating water quantity, for a thermal power plant, the evaporation loss and the blowing loss account for 35% ~ 70% of the total water consumption of the thermal power plant, the water loss is serious, in addition, the evaporation moisture enters the air, so that the air temperature and the air humidity are increased, in winter, moist air is discharged out of the tower and mixed with external cold air, fog clusters containing a plurality of tiny liquid drop groups can be formed, roads are frozen, the visibility of the air is reduced, and the environmental and safety problems are brought.

For example, the conventional patent document CN107449315A discloses a hyperbolic cooling tower water collector, which comprises a plurality of water collecting module groups, each water collecting module group comprises a plurality of water collecting blades horizontally arranged at intervals, each water collecting blade is a continuous multi-waveform sheet body formed by one-time die pressing of an aluminum alloy material, and a voltage is applied to a steel wire rope of an adjacent water collecting module group, so that static electricity is generated between the water collecting blades to form an electrostatic magnetic field to achieve the effect of rapid condensation of water vapor; however, the water collector needs to be additionally provided with an additional power supply, and the humidity and the temperature of the outlet of the wet air passing through the cooling tower are high, so that the safety of the water collector is difficult to guarantee.

For another example, the prior patent document CN103743289A discloses a cooling tower fog dispersal water collection device, which comprises a cold air supply system, a condensation system, a mixed air box, and an air inlet adjusting device, wherein the cold air supply system comprises a refrigerator, a refrigeration exchanger, an axial flow fan, a variable diameter air duct, and an air collecting box, and the air flow which is heated and humidified after heat exchange in the cooling tower is cooled and dehumidified in the condensation system to achieve the purpose of fog dispersal and water collection; however, the device has large investment and high energy consumption, needs a plurality of systems to work coordinately, and has a certain distance from the aims of energy conservation and environmental protection.

For another example, the prior patent document CN204987933U discloses a deep condensed water recycling and demisting device in a cooling tower, which includes a condensing module, a louver and a wind-proof plate; the hot and humid air in the tower and the cold and dry air outside the tower pass through the condensation module for heat exchange simultaneously, the water vapor is condensed into water drops for recycling, and the hot and humid air in the tower and the cold and dry air outside the tower are mixed at the upper part of condensation to reduce the moisture content, so that the effects of water saving and fog dissipation are achieved; however, because the fan needs to be additionally arranged, and the wind resistance of the condensing module is large, the air intake is very easy to be insufficient when the pressure head is not high, and the cooling efficiency of the cooling tower is affected under the condition that the design margin of the cooling tower is not large.

Therefore, there is still a need for improvement and development of the prior art.

Disclosure of Invention

in order to solve the technical problems, the invention provides the bionic water condensing device for the cooling tower, which has a simple structure, does not need additional power consumption and has a better water condensing and fog eliminating effect.

Meanwhile, the invention also provides a cooling tower which can obviously reduce the emission of white smoke, and is energy-saving and environment-friendly.

The technical scheme of the invention is as follows: a bionic water condensing device for a cooling tower is arranged in the cooling tower and is positioned between a top outlet fan and a spraying device; the bionic water condensing device comprises a fixed support and a plurality of groups of corrugated plates, wherein each group of corrugated plates consists of two corrugated plates, and the plurality of groups of corrugated plates are arranged in parallel at equal intervals in a frame consisting of the fixed support; the two outer surfaces of each group of corrugated plates are respectively provided with a super-hydrophobic coating as a hydrophobic substrate, a plurality of hemispherical bulges are arranged on the hydrophobic substrate at intervals, and the surfaces of all the hemispherical bulges are respectively provided with a super-hydrophilic coating; and the surface of the hydrophobic substrate between every two rows of hemispherical bulges is provided with a drainage groove, the bottom of each group of corrugated plates is also provided with a water collecting groove, and the inner surfaces of the drainage groove and the water collecting groove are also provided with super-hydrophobic coatings.

The bionic water condensing device for the cooling tower is characterized in that: three adjacent hemispherical bulges are uniformly distributed in a triangular shape on the hydrophobic substrate.

The bionic water condensing device for the cooling tower is characterized in that: three adjacent hemispherical bulges are uniformly distributed on the hydrophobic substrate in a regular triangle shape.

The bionic water condensing device for the cooling tower is characterized in that the diameter of each hemispherical protrusion is 0.5 ~ 1.0.0 mm, and the distance between every two adjacent hemispherical protrusions is 0.5 ~ 1.5.5 mm.

The bionic water condensing device for the cooling tower is characterized in that the distance between two corrugated plates in each group of corrugated plates is 5-12mm, and the distance between two adjacent groups of corrugated plates is 20 ~ 40 mm.

The bionic water condensing device for the cooling tower is characterized in that: each group of corrugated plates is in a broken line plate shape, an S-shaped curved surface plate shape or a trapezoid plate shape.

The bionic water condensing device for the cooling tower is characterized in that: each group of corrugated plates is made of copper, aluminum, polyvinyl chloride or polypropylene materials into a plate shape.

The bionic water condensing device for the cooling tower is characterized in that: the super-hydrophilic coating is a micro-nano composite coating consisting of polyacrylic acid, a short linear fluorine chain surfactant and a polar hydrophilic group, or a transparent super-hydrophilic titanium dioxide nano coating.

The bionic water condensing device for the cooling tower is characterized in that: the super-hydrophobic coating is a composite polymer material coating consisting of polytetrafluoroethylene and polyphenylene sulfide, or a silicon dioxide nano material coating.

A cooling tower comprises a tower body, a top outlet fan spray device and a water collector, wherein the top outlet fan is installed at the top of the tower body, the spray device and the water collector are both installed inside the tower body, and the water collector is located between the top outlet fan and the spray device, wherein: the water collector is arranged as the bionic water condensing device for the cooling tower.

According to the cooling tower and the bionic water condensing device thereof, the corrugated plate with the bionic nano brown beetle back convex-concave alternate structure is adopted, and the application of the hydrophilic and hydrophobic coating is combined, so that the recovery rate of water vapor in hot and humid air is obviously increased, the humidity of outlet gas is effectively reduced, the evaporation loss is greatly reduced, and the purposes of condensing water and dispersing fog are achieved; the device has the advantages of low investment cost, simple structure, no extra power consumption, capability of recovering evaporated water and floating drops, better condensed water fog dissipation effect, obvious reduction of white smoke emission, energy conservation and environmental protection.

Drawings

FIG. 1 is a schematic view of a bionic nano-scale Dendrobium besseyi of the bionic water condensation device of the invention;

FIG. 2 is a schematic structural diagram of a single corrugated plate used in the bionic water condensation device of the present invention;

FIG. 3 is a schematic view of the overall structure of the bionic water condensing device of the invention;

FIG. 4 is a schematic diagram of the internal structure of an embodiment of a cooling tower of the present invention.

Detailed Description

The embodiments and examples of the present invention will be described in detail below with reference to the accompanying drawings, and the described embodiments are only for the purpose of illustrating the present invention and are not intended to limit the embodiments of the present invention.

As shown in figure 1, figure 1 is a schematic diagram of a bionic nano-bushy beetle of a bionic water condensation device, the nano-bushy beetle is arranged in the southwest of Africa, the special concave-convex structure on the back of the nano-bushy beetle can accelerate the condensation speed of water vapor in hot and humid air and cannot be blown away again by wind, and the water absorption capacity of the nano-bushy beetle can be improved by one magnitude due to the special performance on the back of the beetle.

As shown in fig. 2, fig. 2 is a schematic structural diagram of a single group of corrugated plates used in the bionic water condensation device of the present invention, taking an S-shaped curved plate-shaped single group of corrugated plates 110 as an example, the group of corrugated plates 110 is composed of two corrugated plates, a super-hydrophobic coating is coated on the outer surfaces of the front and back surfaces of the group of corrugated plates 110 as a hydrophobic substrate, a plurality of hemispherical protrusions 111 are arranged on the hydrophobic substrate at intervals, and a super-hydrophilic coating is coated on the surfaces of all the hemispherical protrusions 111; the surface of the hydrophobic substrate between every two rows of hemispherical bulges 111 is provided with a drainage groove 112, for example, the bottom of the hydrophobic substrate can be provided with a through hole or a through groove which is communicated with the gap space between the two corrugated plates, the protruding directions of the structures of the hemispherical bulges 111 on the two corrugated plates in each group of corrugated plates 110 are opposite, and the directions of the hydrophilic and hydrophobic surfaces on the two corrugated plates in each group of corrugated plates 110 and the structures provided with the drainage grooves 112 are opposite; the bottom of each group of corrugated plates 110 is also provided with a water collecting groove 113 which is communicated with the gap space inside the group of corrugated plates 110, and the inner surfaces of the water drainage grooves 112 and the water collecting grooves 113 are also provided with super-hydrophobic coatings; in each group of corrugated plates 110, the surfaces of the two corrugated plates facing the internal gap space thereof may be coated with a super-hydrophobic coating layer to facilitate drainage.

When the wet hot air flows through the hemispherical bulges 111, the super-hydrophilic coating on the surface of the wet hot air can accelerate the condensation of the water vapor in the wet hot air flow, enhance the capture rate of tiny liquid drops, condense and accumulate water on the surfaces of the hemispherical bulges 111 to form beads, and then flow down along the surfaces of the hemispherical bulges 111, so that the condensation speed of the water vapor can be increased, the disturbance of the ascending air flow can be aggravated due to the special geometric structure of the semi-spherical bulges, the turbulence degree is improved, and the liquid drops in the water vapor are further recovered; moreover, because the increase rate of the surface area of the liquid drop is far less than the increase rate of the volume, the probability of secondary air blowing loss can be greatly reduced, and therefore, the liquid drop formed on the hemispherical bulge 111 cannot be blown up again by the air; when passing through the hydrophobic substrate between the hemispherical bulges 111, the surface friction of the super-hydrophobic coating is very small, so that the flow guiding effect on water drops can be achieved, the condensed water drops can quickly flow into the drainage groove 112 to form liquid drops, and meanwhile, the micro liquid drops collide the hydrophobic surface and can be bounced or blown to a hydrophilic area by wind, so that the diameter increase of the water drops at the hemispherical bulges 111 is accelerated, and the capture effect of the micro liquid drops in wet air is obviously improved; the drainage grooves 112 are in the shape of an open inclined groove, the super-hydrophobic coating on the surfaces of the drainage grooves 112 can accelerate the discharge of liquid drops, and the liquid drops quickly converge into the water collection grooves 113 from the gap space between the two corrugated plates 110 to form water flow; the water collecting grooves 113 are in a closed curved surface tubular shape, condensed water can be discharged in time, wet air can be prevented from entering from the gap space inside each group of corrugated plates 110 to block liquid drops from flowing out of the water discharging grooves 112, the super-hydrophobic coating on the surfaces of the water collecting grooves 113 can accelerate the discharge of water flow, and the condensed water is collected to the collecting pipe on the other side of the cooling tower for subsequent utilization.

In a preferred embodiment of the corrugated plate used in the bionic water condensation device, specifically, the diameter of the hemispherical protrusions 111 is 0.5 ~ 1.0.0 mm, the distance between two adjacent hemispherical protrusions 111 is 0.5 ~ 1.5.5 mm, preferably, three adjacent hemispherical protrusions 111 are uniformly distributed in a triangular shape on the hydrophobic substrate, the efficiency of water vapor condensation when hot and humid air flows through the triangular arrangement of the hemispherical protrusions 111 can be further improved, and the turbulence degree of turbulent flow formed by the hot and humid air flows is further intensified, preferably, three adjacent hemispherical protrusions 111 are uniformly distributed in a regular triangular shape on the hydrophobic substrate, so that the efficiency of water vapor condensation when hot and humid air flows through the hydrophobic substrate is maximally improved, and the turbulence degree of turbulent flow formed by the hot and humid air flows is maximally intensified.

Preferably, the shape of each group of corrugated plates 110 may be a zigzag plate or a trapezoidal plate, in addition to the S-shaped curved plate.

Specifically, each group of corrugated plates 110 may be made of copper, aluminum, polyvinyl chloride or polypropylene.

specifically, the super-hydrophilic coating can adopt a micro-nano composite coating consisting of polyacrylic acid, a short linear fluorine chain surfactant and a polar hydrophilic group, and can also adopt a transparent super-hydrophilic titanium dioxide nano coating.

Specifically, the super-hydrophobic coating can be a composite polymer material coating composed of polytetrafluoroethylene and polyphenylene sulfide, and can also be a silicon dioxide nano material coating.

Referring to fig. 3, fig. 3 is a schematic view of the overall structure of the bionic water condensation device of the present invention, based on the single group of corrugated plates used in the bionic water condensation device, the bionic water condensation device 100 for a cooling tower of the present invention is installed inside the cooling tower and located between a top outlet fan and a spray device, the bionic water condensation device 100 includes a fixed support 120 and a plurality of groups of corrugated plates 110, and the plurality of groups of corrugated plates 110 are arranged in parallel at intervals and are inserted inside a frame composed of the fixed support 120.

Preferably, the distance between two corrugated plates in each group of corrugated plates 110 is 5-12mm, the distance between two adjacent groups of corrugated plates 110 is 20 ~ 40mm, the condensation efficiency within the distance range is the largest, experiments show that after passing through the bionic condensation device 100, the humidity of the humid and hot air is reduced from the original saturated relative humidity to 75% -85% and is changed into unsaturated gas, water drops flow into the water collecting groove 113 from the device and are discharged out of the cooling tower for further use, the recovery rate of saturated humid and hot floating drops can reach more than 95%, if a water collector in the prior art is adopted, only less than 90% of saturated humid and hot floating drops can be recovered, and for the evaporated water losing the floating drops, experiments also show that the recovery rate of the bionic condensation device 100 can reach 15 ~ 25%, so that the water saving effect of the bionic condensation device 100 is more obvious, no additional bionic fan is needed when the bionic condensation device 100 is installed, the equipment investment and operation costs are reduced, and the investment and the bionic condensation device 100 is more convenient to install and maintain.

Referring to fig. 4, fig. 4 is a schematic diagram of an internal structure of an embodiment of the cooling tower of the present invention, based on the above-mentioned bionic water condensing device 100, the cooling tower 200 of the present invention includes a tower body 210, a top outlet fan 220, a spraying device 230, a water collector 240 and a water pump 250; the space at the bottom of the tower body 210 is used for containing circulating water, the cooled circulating water is supplied to a lower level for utilization through the water pump 250, the side wall of the lower portion of the tower body 210 is provided with an air inlet 211, the top outlet fan 220 is installed at the top of the tower body 210, the spraying device 230 and the water collector 240 are both installed inside the tower body 210, the spraying device 230 is located at the middle upper portion of the tower body 210, the water collector 240 is located between the top outlet fan 220 and the spraying device 230, and the water collector 240 is the bionic water condensing device 100 in any one of the embodiments.

That is, the bionic water condensation device 100 of the present invention is a hemispherical protrusion 111 whose surface is covered with super-hydrophilic coating, and the hydrophobic base among the hemispherical protrusions 111 and the corrugated plate type water collector 240 in which the drainage groove 112 and the water collection groove 113 are coated with a super-hydrophobic coating, it is arranged between the top outlet fan 220 of the cooling tower and the spraying device 230, after the inlet cold air and the circulating water are subjected to heat-mass exchange, when the heated and humidified wet and hot air passes through the super-hydrophilic hemispherical protrusions 111 on the surface of the water collector 240, water drops are formed by condensation on the top end of the air collector, the water drops grow up rapidly and slide to the hydrophobic surface, and is rapidly discharged through the drainage grooves 112 and the water collecting grooves 113, the condensation speed of water vapor and the removal speed of liquid drops in hot and humid air can be increased at the same time, thereby obviously reducing the moisture content of the air at the outlet of the cooling tower and changing the wet air into unsaturated wet air after being discharged out of the tower.

The bionic water condensing device 100 can improve the collision probability of tiny liquid drops carried in hot and humid air and the surface of the water collector 240, further increase the recovery efficiency of the tiny liquid drops to reduce the blowing loss, and simultaneously can improve the condensation rate of water vapor in the air, reduce the air humidity, reduce the evaporation loss, greatly reduce the probability of forming fog and achieve the purposes of fog dissipation and water saving due to the existence of hydrophilic and hydrophobic materials on the surface.

The cooling tower 200 of the invention does not need to add extra energy consumption and auxiliary machines, has simple structure, convenient installation and maintenance and low cost, does not influence the outflow of damp and hot air at the upper part of the filler, can ensure the cooling effect of the cooling tower, can reduce the emission of white smoke, saves water and energy, is environment-friendly and economical, and is an ideal scheme for saving water and eliminating fog of the existing cooling tower.

It should be understood that the above-mentioned embodiments are merely preferred examples of the present invention, and not restrictive, but rather, all the changes, substitutions, alterations and modifications that come within the spirit and scope of the invention as defined by the appended claims should be considered as obvious to those skilled in the art.