Water-saving mist-eliminating cooling tower and mist-eliminating filler unit thereof

Abstract

The present invention discloses a demisting packing unit, which includes: a plurality of tile-ribbed pieces, the upper portion of which is a dispersed section and the lower portion is a uniform section, the plurality of tile-ribbed pieces are arranged parallel to each other, and each tile-ribbed piece includes: a plurality of deflection surfaces, the bottom end of each deflection surface is provided with an overflow groove; and a liquid film surface, which extends vertically downward along the lower side wall of the overflow groove; and a sealing edge, which is alternately arranged on the opposite sides between adjacent tile-ribbed pieces to form a first channel and a second channel arranged at intervals. The present invention also discloses a water-saving demisting cooling tower. Through the design of the overflow groove and the liquid film surface of the demisting packing unit of the present invention, the demisting packing unit can replace the water-spraying packing of a conventional cooling tower and can achieve the dual functions of water saving and demisting; the water-saving demisting cooling tower of the present invention is easy to install and the manufacturing cost is comparable to that of an ordinary open cooling tower.

Description

Technical Field

[0001] The invention relates to the technical field of cooling towers, in particular to a water-saving and mist-eliminating cooling tower and a mist-eliminating filler unit thereof. Background Art

[0002] Circulating water cooling systems are widely used in industries such as petroleum and chemical engineering. Most circulating water cooling systems use open cooling towers as their primary cooling equipment. Traditional open cooling towers use packing to cool the circulating water. Circulating hot water from the process unit enters the cooling tower's spray system and then flows down into the packing, typically made of PVC sheets. Water forms a film along the PVC sheets as it enters the packing. Dry, cool air from outside enters the packing from the bottom up, exchanging heat with the film. The film evaporates and cools the air, heating and humidifying it to form hot and humid air. A fan is installed at the top of the cooling tower to exhaust the hot and humid air, cooling the circulating hot water and turning it into circulating cold water.

[0003] Open cooling towers have the following problems. For example, due to the high humidity and temperature of the hot and humid air discharged from the tower, white fog will form when the ambient temperature is low. The drifting fog affects the visibility of surrounding residential areas and traffic roads, destroys the city's landscape, and causes the humidity in downwind areas to rise; the heat of circulating hot water is completely cooled by evaporation, and a large amount of circulating water is evaporated into the atmosphere, resulting in high water consumption; the water filling is generally more than 5 meters above the ground, and a water pump is required to increase the pressure to the circulating water distribution system above the water filling. The pressure head is generally about 15 meters. For an ordinary open cooling tower with a capacity of 5,000 tons / hour, the pressure head power exceeds 400kW, and the energy consumption is high.

[0004] To reduce circulating water evaporation, eliminate white mist, and reduce pump power consumption, closed cooling towers can be used in some applications. A closed cooling tower houses a tubular heat exchanger within the tower, ensuring cooling through heat exchange between circulating air, spray water, and the circulating water. This structure allows for the cooling water to be stopped in winter, allowing heat to be transferred purely through the walls of the heat exchange tubes via cold air, minimizing water evaporation. A circulating water pump delivers the circulating water to the coils, effectively recovering the high potential energy within the water.

[0005] Closed cooling towers also have some problems. For example, traditional coil closed cooling towers are less efficient, occupy three times the area of ​​traditional open towers, and have poor cooling effect in summer; the cost is high, the processing and manufacturing of metal coils is expensive, and the investment cost per ton of water cooling is about 20 times that of open towers.

[0006] To solve the above problems, patent document CN111664726A discloses a defogging packing, which is composed of a plurality of heat exchange plates arranged in an array, with a first channel and a second channel spaced apart and not connected to each other formed between the plurality of heat exchange plates. The defogging cooling tower includes a water spraying packing and a defogging packing, and the defogging packing layer is formed by connecting the defogging packing in a rhombus shape diagonally. During operation, the circulating hot water sprayed by the first sprayer exchanges heat with the cold air entering through the lower air inlet of the cooling tower in the water spraying packing. The circulating hot water is cooled to a lower temperature, while the dry cold air is heated to a higher temperature and its moisture content increases, forming humid hot air that is basically in a saturated state. The humid hot air leaves the water spraying packing and moves upward into the defogging packing to exchange heat with the dry cold air that enters the defogging packing through the cold air channel. The heated dry cold air and the cooled humid hot air mix after leaving the defogging packing upward and are discharged through the air outlet.

[0007] However, the aforementioned patent document describes a mist-dispelling cooling tower equipped with both water-spraying and mist-dispelling packing. The mist-dispelling packing, the primary mist-dispelling component, exhibits high operating resistance, thereby impacting the cooling performance of the entire cooling tower and increasing fan power consumption. The mist-dispelling packing within this mist-dispelling cooling tower is arranged in a diamond pattern, connected diagonally to form layers. This requires full encapsulation, resulting in high installation and manufacturing costs. The tower itself is also tall and expensive, and water conservation is poor during cold winter months.

[0008] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0009] One of the purposes of the present invention is to provide a water-saving and mist-eliminating cooling tower and its mist-eliminating filler unit, so as to improve the problem that the existing cooling tower cannot achieve optimal configuration under various working conditions and has limited mist-eliminating and water-saving effects.

[0010] Another object of the present invention is to provide a water-saving mist-eliminating cooling tower and a mist-eliminating filler unit thereof, thereby improving the problems of high operating resistance and high energy consumption of existing cooling towers.

[0011] Another object of the present invention is to provide a water-saving mist-eliminating cooling tower and a mist-eliminating filler unit thereof, thereby reducing the manufacturing and maintenance costs of the cooling tower.

[0012] To achieve the above-mentioned purpose, according to the first aspect of the present invention, the present invention provides a defogging filler unit, which includes: a plurality of tile-edge pieces, the upper part of which is a dispersion section, and the lower part is a uniform section, the plurality of tile-edge pieces are arranged parallel to each other, and each tile-edge piece includes: a plurality of deflection surfaces, and an overflow groove is provided at the bottom end of each deflection surface; and a liquid film surface, which extends vertically downward along the lower side wall of the overflow groove; and a sealing edge, which is alternately arranged on the opposite sides between adjacent tile-edge pieces to form a first channel and a second channel arranged at intervals.

[0013] Furthermore, in the above technical solution, the liquid film surface at the wave crest of the tile piece and the liquid film surface at the wave trough of the adjacent tile piece are located on the same vertical plane.

[0014] Furthermore, in the above technical solution, the dispersed segment is a triangle and the uniform segment is a rectangle.

[0015] Furthermore, in the above technical solution, one end of the overflow trough is closed by an edge seal, and the other end is provided with a water cofferdam.

[0016] Furthermore, in the above technical solution, a retracted section is provided at the lower portion of the uniform section, and the overflow groove of the retracted section forms a guide groove to guide the flow to both ends.

[0017] According to the second aspect of the present invention, the present invention provides a water-saving mist-eliminating cooling tower, which includes: a tower body, a lower part of which is provided with an air inlet, and an upper end of which is provided with an air outlet; a spray unit, which sprays hot water; and a mist-eliminating filler layer, which is arranged between the spray unit and the air inlet, and the mist-eliminating filler layer is formed by the side surfaces of multiple mist-eliminating filler units as in any one of the above-mentioned technical solutions abutting each other.

[0018] Furthermore, in the above technical solution, the first channels and the second channels of adjacent demisting filler units are staggered and not connected to each other.

[0019] Furthermore, in the above technical solution, the water-saving and mist-eliminating cooling tower also includes: a plurality of partitions, which are arranged at the top of the mist-eliminating filler unit and are perpendicular to the tile-edge sheet, and the plurality of partitions separate the first and second humid and hot air channels into a first and second humid and hot air channel, and the second humid and hot air channel is provided with a damper, which is opened and closed by rotating the damper, and the damper is higher than the spray unit.

[0020] Furthermore, in the above technical solution, the damper includes a square rotating shaft and a rotating baffle.

[0021] Furthermore, in the above technical solution, the water-saving and mist-eliminating cooling tower has three operating modes: a closed mode, in which the damper closes the second hot and humid air channel and the spray unit sprays into the second hot and humid air channel; an open water-saving mode, in which the damper opens the second hot and humid air channel and the spray unit sprays into the first hot and humid air channel; and an open thermal mode, in which the damper opens the second hot and humid air channel and the spray unit sprays into the first hot and humid air channel and the second hot and humid air channel.

[0022] Furthermore, in the above technical solution, the water-saving mist-eliminating cooling tower further comprises: a return water collection tank, which is located below the mist-eliminating filler layer, and the return water collection tank is connected to the spray unit through a circulating water pump.

[0023] Furthermore, in the above technical solution, the return water collection tank is arranged corresponding to the abutting surface of the adjacent mist elimination filler unit.

[0024] Furthermore, in the above technical solution, the spray unit is provided with a plurality of nozzles, and the nozzles are evenly distributed along the abutting surfaces of adjacent demisting filler units.

[0025] Furthermore, in the above technical solution, the nozzle is a square nozzle, and the square nozzle is provided with a first square splash plate and a second square splash plate.

[0026] Furthermore, in the above technical solution, the water-saving mist-eliminating cooling tower also includes: a water collecting tank, which is arranged at the bottom of the tower body; and a water collector, which is arranged above the spray unit, and a transition cavity is left between the water collector and the air outlet.

[0027] Furthermore, in the above technical solution, a fan is provided at the air outlet.

[0028] Compared with the prior art, the present invention has one or more of the following beneficial effects:

[0029] 1. The design of the overflow trough and liquid film surface of the mist dispelling packing unit allows it to replace the water-spraying packing of conventional cooling towers while achieving the dual functions of water conservation and mist elimination. Liquid sprays downward into the overflow trough or flows into the overflow trough along the deflection surface. The liquid level in the overflow trough reaches the lower side wall and then overflows, flowing downward in a uniform film along the liquid film surface. The liquid leaves the liquid film surface and continues to flow downward, falling into the overflow trough below, where it continues to overflow and form a film. Gas flows upward through the mist dispelling packing unit, and the liquid droplets raised by the airflow are captured by the back of the deflection surface and flow into the overflow trough below. The sprayed liquid gradually disperses from the upper dispersion section to the lower uniform section, spreading and spreading itself to form a uniform film.

[0030] 2. The water-saving and mist-eliminating cooling tower of this invention utilizes a combination of baffles, dampers, spray units, and mist-eliminating packing units to switch between three operating modes, adapting to different operating conditions and achieving an optimal balance between mist elimination, water conservation, cost savings, and improved operating efficiency. The closed mode is suitable for cold winter months; the open water-saving mode is suitable for temperatures above 0°C in spring and autumn; and the open thermal mode is suitable for high summer temperatures.

[0031] 3. The water-saving, mist-eliminating cooling tower of this invention effectively recovers the high-level potential energy of circulating water, significantly reducing the energy consumption of the circulating water pump. The lower overflow trough of the mist-eliminating packing unit is not equipped with edge sealing or water cofferdams. Instead, it forms a diversion channel that directs water to the return water collection tank at both ends. This collects the circulating water and pumps it to the spray unit via the circulating water pump, significantly saving the circulating water pump's energy consumption.

[0032] 4. The side surfaces of the lower uniform section of the mist dispelling filler unit are closely abutted together to form a water-spraying mist dispelling filler layer, which is easy to install. Its manufacturing cost and tower height are comparable to those of ordinary open cooling towers.

[0033] 5. The square nozzle and square splash plate form a square area spray to achieve uniform water replenishment in the upper dispersed section of the mist dissipation filler unit.

[0034] 6. The damper adopts a square shaft with a large cross-sectional inertia moment, thereby reducing the shaft size and lowering wind resistance.

[0035] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, and to make the above and other purposes, technical features and advantages of the present invention easier to understand, one or more preferred embodiments are listed below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 3D is a schematic diagram of the three-dimensional structure of a packing unit according to one embodiment of the present invention.

[0037] Figure 2 2 is another schematic diagram of the three-dimensional structure of a filler unit according to one embodiment of the present invention.

[0038] Figure 3 3 is a schematic top view of the structure of a packing unit according to one embodiment of the present invention.

[0039] Figure 4 Schematic diagram of the cross-sectional structure of a plurality of tile panels according to one embodiment of the present invention.

[0040] Figure 5 1 is a schematic front view of the structure of a tile sheet according to one embodiment of the present invention.

[0041] Figure 6 1 is a schematic side view of a tile sheet according to another embodiment of the present invention.

[0042] Figure 7 3 is a schematic structural diagram of a water-saving and mist-eliminating cooling tower according to one embodiment of the present invention, wherein the water-saving and mist-eliminating cooling tower is in an open thermal mode.

[0043] Figure 8 3 is a structural schematic diagram of a water-saving and mist-eliminating cooling tower according to one embodiment of the present invention, wherein the water-saving and mist-eliminating cooling tower is in an open water-saving mode.

[0044] Figure 9 3 is a schematic structural diagram of a water-saving and mist-eliminating cooling tower according to one embodiment of the present invention, wherein the water-saving and mist-eliminating cooling tower is in a closed mode.

[0045] Figure 10 Schematic diagram of the cross-sectional structure of a nozzle according to one embodiment of the present invention.

[0046] Figure 11 3 is a schematic diagram of a top view of a nozzle according to an embodiment of the present invention.

[0047] Figure 12 3 is a schematic diagram of a top view of the damper according to an embodiment of the present invention.

[0048] Figure 13 2 is a front view structural schematic diagram of a damper according to another embodiment of the present invention.

[0049] Figure 14 2 is a schematic diagram of the installation of a square rotating shaft and a square sliding bearing of a damper according to one embodiment of the present invention.

[0050] Figure 15 It is a structural schematic diagram of a water-saving mist-eliminating cooling tower according to another embodiment of the present invention.

[0051] Description of main reference numerals:

[0052] 10-tower body, 11-air inlet, 12-air outlet, 121-fan, 122-air duct, 13-spray unit, 130-nozzle, 1301-square through hole, 131-first square splash plate, 1311-first square hole, 132-second square splash plate, 1321-second square hole, 14-misting packing layer, 15-return water collection tank, 151-circulating water pump, 152-return water main pipe, 16-partition, 161-first hot and humid air channel, 162-second hot and humid air channel, 17- damper, 171- square rotating shaft, 172- rotating baffle, 1721- convex rib, 173- square sliding bearing, 174- fixing rod, 18- water collecting tank, 19- water collector, 191- transition chamber, 20- mist elimination packing unit, 21- tile edge piece, 211- dispersion section, 212- uniform section, 213- baffle surface, 214- liquid film surface, 215- overflow trough, 2151- water cofferdam, 216- indentation section, 22- edge sealing, 231- first channel, 232- second channel. DETAILED DESCRIPTION

[0053] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0054] Unless expressly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising” will be understood to include the stated elements or components but not to exclude other elements or components.

[0055] In this document, for ease of description, spatially relative terms such as "below," "beneath," "below," "above," "above," etc. may be used to describe the relationship of one element or feature to another element or feature in the accompanying drawings. It should be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the drawings. For example, if the object in the drawings is turned over, the element described as being "below" or "beneath" other elements or features will be oriented "above" the elements or features. Therefore, the exemplary term "below" can include both below and above. Objects may also have other orientations (rotated 90 degrees or other orientations) and the spatially relative terms used herein should be interpreted accordingly.

[0056] In this document, the terms "first", "second", etc. are used to distinguish two different elements or parts, and are not used to limit specific positions or relative relationships. In other words, in some embodiments, the terms "first", "second", etc. can also be interchangeable with each other.

[0057] like Figures 1 to 5As shown, the demisting packing unit 20 according to a specific embodiment of the present invention includes a plurality of tile-ribbed sheets 21 and edge seals 22 alternately arranged on opposite sides between adjacent tile-ribbed sheets 21, thereby forming a first channel 231 and a second channel 232 spaced apart. The tile-ribbed sheets 21 have a dispersion section 211 at the top and a uniform section 212 at the bottom. The plurality of tile-ribbed sheets 21 are arranged parallel to one another. Each tile-ribbed sheet includes a plurality of baffles 213 and a liquid film surface 214. Each baffle 213 has an overflow trough 215 horizontally disposed at its bottom end. The liquid film surface 214 extends vertically downward along the lower sidewall of the overflow trough 215. When the liquid level in the overflow trough 215 reaches the height of the lower sidewall, it overflows evenly and flows downward along the liquid film surface 214 in a film-like manner. The back of the baffle 213 forms a capture surface, where liquid droplets lifted by the airflow can be captured by the back of the baffle 213 and flow into the overflow trough 215 of the baffle 213 below. In the mist elimination packing unit 20, the liquid flows in a film-like manner, with a large surface area, good heat transfer effect, less liquid-air collision, and low pressure drop, which can meet the operating requirements of the closed mode. In one or more exemplary embodiments of the present invention, as Figure 5 As shown, the dispersion section 211 can be triangular and the uniform section 212 can be rectangular. The liquid is effectively uniformed from top to bottom through the overflow effect of the overflow trough and covers the entire tile rib sheet 21 to prevent deviation. It should be understood that the present invention is not limited to this.

[0058] Combine Figure 6 As shown, in one or more exemplary embodiments of the present invention, the liquid film surface 214 at the wave crest of the tile rib 21 and the liquid film surface 214 at the wave trough of the adjacent tile rib 21 are located on the same vertical plane. Further, in one or more exemplary embodiments of the present invention, one end of the overflow trough 215 is closed by the sealing edge 22, and the other end is provided with a water cofferdam 2151 (refer to FIG. Figure 6 As shown in FIG, both ends of the overflow groove 215 are blocked, and the liquid therein only overflows from the lower side wall and flows downward along the liquid film surface 214.

[0059] Combine Figures 1 to 9As shown, a water-saving and mist-eliminating cooling tower according to a specific embodiment of the present invention comprises a tower body 10, an air inlet 11 being provided at the lower portion of the tower body 10, and an air outlet 12 being provided at the upper end. A spray unit 13 for spraying hot water is provided in the tower body 10, and a mist-eliminating filler layer 14 is provided between the spray unit 13 and the air inlet 11. The mist-eliminating filler layer 14 is formed by a plurality of mist-eliminating filler units 20 arranged with their sides abutting each other. Furthermore, in one or more exemplary embodiments of the present invention, a water collecting tank 18 is provided at the bottom of the tower body 10 of the water-saving and mist-eliminating cooling tower; a water collector 19 is provided above the spray unit 13, and a transition cavity 191 is left between the water collector 19 and the air outlet 12. Exemplarily, a fan 121 is provided at the air outlet 12, and a wind tube 122 for guiding air is provided on the outside of the fan 121. Illustratively, in one or more embodiments of the present invention, ambient cold air enters the water-saving demisting cooling tower through the air inlet 11, and enters the demisting filler layer 14 upward, and the circulating hot water is sprayed into the demisting filler layer 14 through the spray unit 13, and the circulating hot water undergoes evaporative heat exchange and / or wall heat exchange with the ambient cold air, and the circulating hot water is cooled and enters the water collection tank 18, and the ambient cold air is heated to become humid hot air and / or dry hot air, and after passing through the water collector 19 and the transition chamber 191, it is discharged out of the tower body 10 by the fan 121 of the air outlet 12.

[0060] Furthermore, in one or more exemplary embodiments of the present invention, the first channels 231 and second channels 232 of adjacent demisting packing units 20 are arranged in an interlaced manner and are not interconnected. For example, the first channels 231 and second channels 232 have the same shape, differing only in the location of their openings. As shown in the figure, the openings of the first channels 231 in the demisting packing layer are located at the bottom and to the left of the triangular dispersed segment, while the openings of the second channels 232 are located at the bottom and to the right of the triangular dispersed segment.

[0061] Furthermore, in one or more exemplary embodiments of the present invention, a return water collection tank 15 is provided below the mist-eliminating packing layer 14 of the water-saving mist-eliminating cooling tower. The return water collection tank 15 is connected to the spray unit 13 via a circulating water pump 151. Furthermore, in one or more exemplary embodiments of the present invention, the return water collection tank 15 is provided corresponding to the abutment surface of the adjacent mist-eliminating packing unit 20. The return water collection tank 15 may be a square channel structure with an upper opening. Furthermore, in one or more exemplary embodiments of the present invention, a recessed section 216 is provided below the uniform section 212. The width of the recessed section 216 is slightly smaller than that of the uniform section 212, and the overflow trough 215 of the recessed section 216 is not provided with edge seals or water cofferdams at either end. This forms a diversion channel that directs water into the return water collection tank 15 at both ends, where it is then collected in the return water main 152 and pumped to the spray unit 13 by the circulating water pump 151. The provision of the recovery collection tank 15 effectively recovers the high-level potential energy of the circulating water, effectively reducing the energy consumption of the circulating water pump.

[0062] Furthermore, in one or more exemplary embodiments of the present invention, a partition plate 16 is provided at the top of the mist elimination packing unit 20 of the water-saving mist elimination cooling tower, and the partition plate 16 is perpendicular to the tile edge sheet 21. Figures 7-9 As shown, the partition 16 can be set at the top of the triangular dispersion section of the demisting packing unit 20. Multiple partitions 16 separate the first and second moist hot air channels 161 and 162. The second moist hot air channel 162 is provided with a damper 17, which is higher than the spray unit 13. Therefore, even if the damper 17 is in the closed position, the spray unit 13 can still spray into the second moist hot air channel 162. The first channel 231 and the second channel 232 of each demisting packing unit 20 are respectively connected to one of the adjacent first and second moist hot air channels 161 and 162; each first moist hot air channel 161 is connected to the first channel 231 of a demisting packing unit 20 and the second channel 232 of an adjacent demisting packing unit 20; similarly, each second moist hot air channel 162 is connected to the first channel 231 of a demisting packing unit 20 and the second channel 232 of an adjacent demisting packing unit 20.

[0063] Combine Figures 12 to 14 As shown, in one or more exemplary embodiments of the present invention, the damper 17 may be composed of a square shaft 171 and a rotating baffle 172. The rotating baffle 172 can rotate around the square shaft 171 to open or close the second hot and humid air passage 162. The square shaft has a large sectional inertia moment, which can reduce the size of the shaft and thus reduce wind resistance. It should be noted that in one or more exemplary embodiments of the present invention, the closed position of the damper 17 may be a horizontal position (such as Figure 9 As shown), the open position can be a vertical position (as Figure 7 and Figure 8 As shown in the figure, the present invention is not limited thereto. For example, the square rotating shaft 171 can be supported by a square sliding bearing 173, and the square rotating shaft 171 and the rotating baffle 172 can be fixedly mounted by a fixing rod 174, but the present invention is not limited thereto. The rotating baffle 172 can also be provided with a plurality of ribs 1721 to increase strength. For example, and not for limitation, the rotating baffle 172 is an integrally molded structure. The rotating baffle 172 can be made of FRP, and the square sliding bearing 173 can be made of PE, but the present invention is not limited thereto.

[0064] Combine Figure 10 and Figure 11As shown, in one or more exemplary embodiments of the present invention, the spray unit 13 is provided with a plurality of nozzles 130, which are evenly distributed along the abutting surfaces of adjacent defogging packing units 20. Furthermore, in one or more exemplary embodiments of the present invention, the nozzles 130 may be square nozzles, each provided with a first square deflector 131 and a second square deflector 132, thereby forming a square spraying area for evenly spraying the defogging packing layer 14. A square through-hole 1301 is provided within the cylindrical portion of the nozzle 130, and a first square hole 1311 and a second square hole 1321 are respectively provided at the centers of the first square deflector 131 and the second square deflector 132. The square through-hole 1301, the first square hole 1311, and the second square hole 1321 are coaxial with each other and decrease in size in sequence. The water flows into each nozzle 130 of the spray unit 13, and is sprayed onto the first square splash plate 131 through the square through hole 1301 of the nozzle 130; since the cross section of the first square hole 1311 is smaller than the square through hole 1301, a part of the water flows directly onto the first square splash plate 131, and scatters downward through the edge of the first square splash plate 131 to form a square spraying area, and a part of the water flows through the first square hole 1311 and is sprayed onto the second square splash plate 132; the cross section of the second square hole 1321 on the second square splash plate 132 is smaller than the first square hole 1311, and a part of the water flows directly onto the second square splash plate 132, and scatters downward through the edge of the second square splash plate 132 to form a square spraying area, and a part of the water flows through the second square hole 1321 and falls below to form a square spraying area. It should be understood that Figure 10 and Figure 11 In the embodiment shown, the square through hole 1301, the first square hole 1311 and the second square hole 1321, and the first square splash plate 131 and the second square splash plate 132 are all squares, but these structures can be rectangular to form a rectangular spraying area accordingly. Those skilled in the art can choose according to actual needs, and the present invention is not limited to this.

[0065] Further, in one or more exemplary embodiments of the present invention, the water-saving mist-eliminating cooling tower has three operating modes: a closed mode, in which the damper 17 closes the second hot and humid air channel 162, and the spray unit 13 sprays to the second hot and humid air channel 162; an open water-saving mode, in which the damper 17 opens the second hot and humid air channel 162, and the spray unit 13 sprays to the first hot and humid air channel 161; and an open thermal mode, in which the damper 17 opens the second hot and humid air channel 162, and the spray unit sprays to the first hot and humid air channel 161 and the second hot and humid air channel 162.

[0066] Combine Figure 15As shown, in one or more embodiments of the present invention, the tower body 10 can also be a hyperbolic tower, with an air inlet 11 provided at the lower part of the tower body 10 and an air outlet 12 provided at the upper end. A spray unit 13 for spraying hot water is provided in the tower body 10, and a defogging packing layer 14 is provided between the spray unit 13 and the air inlet 11. The defogging packing layer 14 is formed by a plurality of defogging packing units 20 arranged sideways against each other, and a partition 16 is provided at the top of the defogging packing unit 20. Generally, a hyperbolic tower occupies several thousand square meters or tens of thousands of square meters, so a damper structure is not provided in the hyperbolic tower. In the embodiment using a hyperbolic tower, the spray unit 13, the partition 16 and the defogging packing layer 14 can be used to switch between an open water-saving mode and an open thermal mode. The structure is simple, the cost is low, and it is suitable for large-area installation.

[0067] Example 1

[0068] Reference Figures 1 to 7 As shown, this embodiment of the water-saving mist-eliminating cooling tower is used during high summer temperatures. It operates in open thermal mode, achieving maximum cooling capacity. The damper 17 is in the open (vertical) position, and the spray unit 13 simultaneously sprays circulating hot water into the first hot and humid air passage 161 and the second hot and humid air passage 162. In this operating mode, the specific operation process is as follows.

[0069] The circulating hot water is sprayed downward from the spray unit 13 into the mist-eliminating packing layer 14, and the circulating hot water forms a downward-flowing liquid film in the mist-eliminating packing layer 14. The air enters the mist-eliminating packing layer 14 from the air inlet 11 at the lower part of the tower body 10. The air and the liquid film are in countercurrent contact, and the circulating hot water evaporates and cools to become circulating cold water. The air is heated and becomes humid hot air. At the same time, the return water collection tank 15 collects the circulating water from the overflow tank of the indented section 216 at the lower part of the mist-eliminating packing layer 14 and guides it to both sides. The circulating water flows to the circulating water pump 151 through the return water main pipe 152 and is pumped back to the spray unit 13.

[0070] The open thermal mode mist elimination filler layer 14 of this embodiment is used as a common water spray filler, which has the maximum cooling capacity and the cooling capacity is equivalent to that of a common open cooling tower. The water spray density of the whole tower of this embodiment can reach up to 14m 3 / m 2 , high operating efficiency, can meet the harsh cooling conditions in summer. In addition, the installation of the return water collection tank can reduce the head of the circulating water pump by about 5 meters, saving 15% of the circulating water pump's pumping power.

[0071] Example 2

[0072] Reference Figures 1 to 6 and Figure 8As shown, the water-saving mist-eliminating cooling tower of this embodiment is used in spring, autumn, or winter when temperatures are above 0°C. It operates in open water-saving mode, with damper 17 in the open (vertical) position and spray unit 13 spraying circulating hot water only into first hot and humid air passage 161. In this operating mode, the specific operation process is as follows.

[0073] Circulating hot water is sprayed downward from the spray unit 13 into the first moist hot air channel 161. The circulating hot water forms a downward-flowing liquid film in the defogging packing layer corresponding to the first moist hot air channel 161. Air enters the defogging packing layer 14 from the air inlet 11 at the bottom of the tower body 10. In the defogging packing layer corresponding to the first moist hot air channel 161, the air and the liquid film come into countercurrent contact. The circulating hot water evaporates and cools to become circulating cold water, and the air is heated to become moist hot air. In the defogging packing layer corresponding to the second moist hot air channel 162, the cold air flows upward to exchange heat with the liquid film on the other side of the tile rib 21, heating the cold air to become dry hot air. Simultaneously, the return water collection tank 15 collects the circulating water diverted to both sides by the overflow tank of the indented section 216 at the bottom of the defogging packing layer 14. The water flows through the return water main 152 to the circulating water pump 151 and is pumped back to the spray unit 13.

[0074] In spring, autumn and winter, when the weather is not too cold, white mist appears in the cooling tower due to the cool weather, and the cooling capacity of the cooling tower circulating water is sufficient. When the open water-saving mode of this embodiment is put into use, the water saving rate can reach 20% (compared to the ordinary open cooling tower), and the water spraying density of the whole tower can reach up to 12m 3 / m 2 , and complete mist elimination is achieved at ambient temperatures above 0°C. The full-tower pressure drop is equivalent to that of a conventional open-type cooling tower, with no increase in pressure drop. Furthermore, the installation of a return water collection tank reduces the circulating water pump's head by approximately 5 meters, saving 15% of its pumping power.

[0075] Example 3

[0076] Reference Figures 1 to 6 and Figure 9 As shown, the water-saving mist-eliminating cooling tower of this embodiment is used during cold winter months. It is in closed mode, with the damper 17 in the closed (horizontal) position, and the spray unit 13 sprays circulating hot water only into the second hot and humid air passage 162. In this operating mode, the specific working process is as follows.

[0077] Circulating hot water is sprayed downward from the spray unit 13 into the second hot and humid air passage 162, forming a downward-flowing liquid film in the defogging packing layer corresponding to the second hot and humid air passage 162. Air enters the defogging packing layer 14 corresponding to the first hot and humid air passage 161 through the air inlet 11 at the lower portion of the tower body 10, flows upward, and exchanges heat with the liquid film on the other side of the tile rib 21 (the second hot and humid air passage 162). The cold air is heated and converted into dry hot air. Simultaneously, the return water collection tank 15 collects the circulating water diverted to both sides by the overflow trough of the indented section 216 below the defogging packing layer 14. The water is then pumped back to the spray unit 13 via the return water main pipe 152 to the circulating water pump 151.

[0078] In the cold winter, due to the cold weather, the cooling tower will be covered with white mist, and the cooling tower circulating water cooling capacity is relatively abundant. When the closed mode of this embodiment is put into use, the water saving rate can reach 100%, and the water density of the whole tower can reach up to 8m 3 / m 2 , and completely eliminates fog at all-weather ambient temperatures. The circulating water in the defogging packing layer essentially flows as a liquid film along the tile ribs 21, effectively exchanging heat between the cold air and the circulating hot water, without issues such as liquid film depletion and reduced contact area with the tile ribs 21. Furthermore, the installation of a return water collection tank reduces the circulating water pump's head by approximately 5 meters, saving 15% of its pumping power.

[0079] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise form disclosed, and it is apparent that many changes and variations are possible in light of the foregoing teachings. The exemplary embodiments are selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to realize and utilize a variety of exemplary embodiments of the invention and various options and variations. Any simple modifications, equivalent variations, and modifications made to the exemplary embodiments described above are intended to fall within the scope of protection of the present invention.

Claims

1. A defogging filler unit, characterized in that: It includes: A plurality of tile ribs, the upper portion of which is a dispersed section and the lower portion is a uniform section, the plurality of tile ribs are arranged parallel to each other, and each of the tile ribs comprises: A plurality of baffles, each of which has an overflow groove at its bottom end; and a liquid film surface extending vertically downward along the lower sidewall of the overflow trough, the liquid film surface at the crest of the tile piece and the liquid film surface at the trough of an adjacent tile piece being located on the same vertical plane; and The edge seals are alternately arranged on opposite sides between adjacent tile rib pieces to form a first channel and a second channel that are spaced apart.

2. The defogging filler unit according to claim 1, characterized in that: The dispersed section is triangular, and the uniform section is rectangular.

3. The defogging filler unit according to claim 1, characterized in that: One end of the overflow trough is closed by the edge sealing, and the other end is provided with a water cofferdam.

4. The defogging filler unit according to claim 1, characterized in that: A retracted section is provided at the lower portion of the uniform section, and the overflow groove of the retracted section forms a guide groove to guide the flow toward both ends.

5. A water-saving mist-eliminating cooling tower, characterized in that: include: The tower body has an air inlet at its lower part and an air outlet at its upper end; a spray unit that sprays hot water; as well as A demisting filler layer is provided between the spray unit and the air inlet, wherein the demisting filler layer is formed by a plurality of demisting filler units according to any one of claims 1 to 4 being abutted against each other on their side surfaces.

6. The water-saving mist-eliminating cooling tower according to claim 5, characterized in that: The first channels and second channels of adjacent mist eliminating filler units are staggered and not connected to each other.

7. The water-saving mist-eliminating cooling tower according to claim 6, characterized in that: Also includes: A plurality of partitions are arranged at the top end of the demisting filler unit and are perpendicular to the tile edge sheet. The plurality of partitions separate and form a first hot and humid air channel and a second hot and humid air channel. The second hot and humid air channel is provided with a damper, which is opened and closed by rotating the damper. The damper is higher than the spray unit.

8. The water-saving mist-eliminating cooling tower according to claim 7, characterized in that: The damper includes a square rotating shaft and a rotating baffle.

9. The water-saving mist-eliminating cooling tower according to claim 7, characterized in that: The water-saving mist-eliminating cooling tower has three operating modes: a closed mode, wherein the damper closes the second hot and humid air passage, and the spray unit sprays toward the second hot and humid air passage; an open water-saving mode, wherein the damper opens the second hot and humid air passage, and the spray unit sprays water into the first hot and humid air passage; as well as Open thermal mode, wherein the damper opens the second hot and humid air passage, and the spray unit sprays toward the first hot and humid air passage and the second hot and humid air passage.

10. The water-saving mist-eliminating cooling tower according to claim 5, characterized in that: Also includes: A return water collection tank is located below the mist dispelling filler layer and is connected to the spray unit via a circulating water pump.

11. The water-saving mist-eliminating cooling tower according to claim 10, characterized in that: The return water collecting trough is arranged corresponding to the abutting surface of the adjacent mist eliminating filler unit.

12. The water-saving mist-eliminating cooling tower according to claim 5, characterized in that: The spray unit is provided with a plurality of nozzles, and the nozzles are evenly distributed along the abutting surfaces of adjacent mist eliminating filler units.

13. The water-saving mist-eliminating cooling tower according to claim 12, characterized in that: The nozzle is a square nozzle, and the square nozzle is provided with a first square splash plate and a second square splash plate.

14. The water-saving mist-eliminating cooling tower according to claim 5, characterized in that: Also includes: A water collecting tank is arranged at the bottom of the tower body; as well as A water collector is arranged above the spray unit, and a transition cavity is left between the water collector and the air outlet.

15. The water-saving mist-eliminating cooling tower according to claim 5, characterized in that: A fan is provided at the air outlet.

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