A kind of defogging filler unit and water-saving defogging cooling tower

Abstract

The application discloses a kind of fog elimination filler units and water-saving fog elimination cooling towers.The fog elimination filler unit is made of several vertically arranged heat exchange sheet stacks;The two sides of the heat exchange sheet have vertical straight edges, and the lower part connected with the two sides vertical straight edges is triangular;The opposite two sides vertical straight edges of the heat exchange sheet are provided with vertical edge sealing surfaces, forming opposite spaced heat channels and cold channels;The opposite sides between the triangles of adjacent heat exchange sheets are alternately surrounded by inclined edge sealing surfaces, forming spaced heat channel air inlets and cold channel air inlets.The fog elimination filler unit of the application has good water collection and fog elimination effect, and the water-saving fog elimination tower containing the fog elimination filler unit can cancel the water collector layer of the traditional cooling tower.At the same time, the fog elimination cooling tower of the application also has the advantages of low pressure drop, high water-saving rate and low cost.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of cooling towers, and particularly relates to a mist-eliminating cooling tower. BACKGROUND

[0002] In the petroleum, chemical and other industries, there are widely built circulating water cooling systems. Most of the circulating water cooling systems use open cooling towers as the main cooling equipment. The traditional open cooling tower uses fillings to cool the circulating water. The circulating hot water from the process device enters the spraying system of the cooling tower, and then enters the fillings from top to bottom. The fillings are generally made of PVC sheets. When the water enters the fillings, it forms a water film along the PVC sheets. The dry and cold air from outside enters the fillings from bottom to top, exchanges heat with the water film, and the water film evaporates to reduce temperature. The wet and hot air is formed after the dry and cold air is heated and humidified. A fan is installed at the top of the cooling tower to discharge the wet and hot air outside the tower. The circulating hot water is cooled to become circulating cold water. Since the wet and hot air discharged outside the tower has high humidity and temperature, when the ambient temperature is low, the wet and hot air discharged outside the tower mixes with the cold air, and due to cooling and condensation, a mist group containing many small liquid particles is formed. Since the mechanical ventilation cooling tower has a low height, the mist group affects the visibility of the surrounding residential areas and traffic roads, destroys the city landscape, and causes the humidity of the downwind area to rise. With the increasing attention to environmental protection, the mist elimination of the mechanical ventilation cooling tower is also becoming more and more important.

[0003] CN201410005579.0 discloses a deep condensation mist-eliminating environmental protection device. The patent mist-eliminating environmental protection device comprises a tower body, a filling, a water spraying device, a water collector, and a heat exchange device are sequentially arranged in the tower body from bottom to top, an air outlet is arranged at the top of the tower body, a fan is installed in the air outlet, a transition section gas chamber is arranged between the heat exchange device and the air outlet in the tower body. In the above scheme, when working, the hot circulating cooling water sprayed by the water spraying device is cooled by the cold air entering the lower part of the cooling tower, and the temperature of the circulating cooling water is reduced. The temperature of the cold air in the fillings is increased, and the humidity is increased to form wet and hot air in a substantially saturated state. The wet and hot air enters the hot air channel after the water collector, and then enters the heat exchange device to exchange heat with the dry and cold air entering the heat exchange device through the cold air channel. After the heat exchange device, the wet and hot air and the dry and cold air are mixed in the transition section gas chamber and discharged into the atmosphere by the fan.

[0004] The main problems with the aforementioned patented technology are as follows: 1. The heat exchange device within the defogging environmental protection device is the main defogging facility. This heat exchange device is equipped with a diamond-shaped defogging packing assembly. The high operating speed of the cold and hot air within the packing assembly is 1.414 times the average wind speed of the cooling tower cross-section, resulting in high operating resistance and affecting the overall performance of the cooling tower. 2. Under certain pressure drop requirements, the heat exchange area of ​​the heat exchange device within the defogging environmental protection device is limited, resulting in low heat exchange efficiency and poor water-saving effect. 3. The bottom triangular support of the defogging packing assembly in the heat exchange device has low strength, and there is cross-contamination between the cold and hot air on both sides, requiring fully enclosed installation, which increases encapsulation and installation costs. 4. The defogging packing assembly in the heat exchange device is composed of heat exchange plates, which are thin-film structures. The defogging packing assembly is large in size and has low structural strength, making it difficult to install large-sized defogging packing. 5. The fog-eliminating and environmental protection device is equipped with a water collector. An air damper is installed above the water collector. At least one air damper rotation radius is reserved between the air damper and the water collector, resulting in a high tower height and high cost. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide a low-pressure-drop, high-water-saving, and low-cost defogging packing unit and a water-saving defogging cooling tower, so as to achieve efficient water-saving and defogging.

[0006] According to a first aspect of the present invention, an anti-fogging filler unit is provided.

[0007] An anti-fogging packing unit is composed of several vertically arranged heat exchange plates stacked (or layered); the heat exchange plates have vertical straight edges on both sides, and the lower part connected to the vertical straight edges on both sides is triangular; the vertical straight edges on opposite sides of the heat exchange plates are provided with vertical sealing surfaces to form relatively spaced hot channels and cold channels; the opposite sides of the triangles between adjacent heat exchange plates are alternately surrounded by oblique sealing surfaces to form spaced hot channel air inlets and cold channel air inlets.

[0008] Furthermore, the hot aisle air inlet and the cold aisle air inlet (i.e., the openings formed by alternating oblique sealing surfaces surrounding the opposite sides of the lower triangle of adjacent heat exchange plates) are spaced apart, and the other side opposite to the hot aisle air inlet and the cold aisle air inlet is closed by the oblique sealing surface. The cold aisle and the hot aisle are spaced apart and do not intersect each other.

[0009] Furthermore, the hot aisle air inlet and the cold aisle air inlet are located inside the hot and humid air aisle and the cold air aisle of the cooling tower, respectively.

[0010] Furthermore, the heat exchange plate is pentagonal, meaning that the upper part of the two vertical sides is a horizontal side.

[0011] Further, the triangular part of the heat exchange sheet is provided with a baffle structure with a convex or groove cross section along the hypotenuse of the triangle and close to the hypotenuse. The cross section shape of the convex or groove can be triangular, rectangular, semicircular, trapezoidal or other suitable shape. The convex or groove can be used for droplet aggregation and flow guiding.

[0012] Further, the top angle of the lower triangular part of the heat exchange sheet is downward, and the triangle is preferably an isosceles triangle, which can be obtuse, acute or right angle, preferably right angle.

[0013] Further, the two adjacent heat exchange sheets are mirror-symmetric structures.

[0014] Further, each heat exchange sheet comprises a plurality of baffle surfaces, each baffle surface being provided with a water collecting groove at the bottom end, and a liquid film surface vertically extending downward along the lower side wall of the water collecting groove. The baffle surface is a plane with a certain inclination angle, and the inclination angle is 0-90°, preferably 30-60°. The baffle surfaces are alternately arranged on both sides of the heat exchange sheet.

[0015] Further, a flow guiding groove is further provided on the heat exchange sheet. The flow guiding groove vertically or obliquely extends downward along the vertical edge of the heat exchange sheet, and the cross section of the flow guiding groove is generally triangular or small radius semicircular structure. The flow guiding groove can provide a channel for water flow. The flow guiding groove can guide the water collected by the water collecting groove to the lowermost part of the heat exchange sheet, and return to the tower by gravity.

[0016] Further, the hot channel outlet and the cold channel outlet are in the same direction and both upward. The hot channel and the cold channel are not connected inside the fog elimination filler.

[0017] Further, the heat exchange sheet material can be selected from one of PVC, PP or similar thin film composite material, preferably PVC heat conducting plastic.

[0018] Further, the longitudinal opening formed by the two vertical edges of the heat exchange sheet is closed by the vertical sealing edge.

[0019] Further, the heat exchange sheet is a pentagon, i.e. the upper part of the two vertical edges is a horizontal edge. Alternatively, the heat exchange sheet is a hexagon structure, i.e. the upper part of the two vertical edges is connected to a triangular structure.

[0020] Further, the lower triangular part of the heat exchange sheet is preferably an isosceles triangle, which can be obtuse, acute or right angle, preferably right angle.

[0021] Further, the hot channel outlet and the cold channel outlet are upward. The hot channel and the cold channel are not connected inside the fog elimination filler.

[0022] Further, the heat exchange sheet material can be selected from one of PVC, PP or similar thin film composite material, preferably PVC heat conducting plastic.

[0023] Further, each of the mist-eliminating filler units is formed by bonding together several vertically arranged heat exchange sheet stacks (or layers).

[0024] Further, each of the mist-eliminating filler units is formed by bonding together several heat exchange sheets. The mist-eliminating filler units can be packaged using conventional techniques in the art, such as using FRP or stainless steel profiles to connect the units at the corners to form a cage structure, and the water-saving mist-eliminating filler is fixed in the cage structure. In the present application, the following packaging structure is recommended: the triangular top corners of the heat exchange sheets are bonded together by fold surfaces A and B, and a triangular strip is bonded to the surfaces (or the outer surfaces) of the fold surfaces A and B; the fold surfaces A and B are long fold strips that are alternately bent in different directions and have a certain width, and the included angle of the triangular strip is the same as the angle of the triangular top corner. The fold surfaces A and B separately close the hot air inlet or the cold air inlet, which prevents the mixing of the hot and humid air and the cold air at the triangular position, and prevents the condensate water in the hot air passage from flowing into the cold air passage.

[0025] According to a second aspect of the present application, a water-saving mist-eliminating cooling tower is provided, which comprises a mist-eliminating filler layer formed by the mist-eliminating filler units described above.

[0026] A water-saving mist-eliminating cooling tower comprises a tower body, a water-spraying filler air inlet provided at the lower part of the tower body, a water-spraying filler provided above the water-spraying filler air inlet, a spraying unit provided above the water-spraying filler, a damper and a mist-eliminating passage provided above the spraying unit, a mist-eliminating filler layer provided at the upper end of the damper and the mist-eliminating passage, and an air outlet provided at the upper end of the mist-eliminating filler layer; the mist-eliminating filler layer is formed by a plurality of the mist-eliminating filler units described above.

[0027] Further, the mist-eliminating passage comprises a partition and a damper. The partition divides the mist-eliminating passage system into a cold air passage and a hot and humid air passage. The cold air passage is connected to a louver provided at the side wall of the water-saving mist-eliminating cooling tower.

[0028] Further, the hot and humid air passage and the cold air passage are formed by the partition. The hot and humid air passage and the cold air passage are not mixed with each other. The upper end of the partition is connected to and closes the triangular bottom corner of the lower part of the mist-eliminating filler group, the lower end of the adjacent partition is provided with a damper at intervals, and the lower end of the partition is connected to the side of the damper. The partition, the damper and the mist-eliminating filler layer form the cold air passage (the damper is kept in a closed state, i.e. in a horizontal position), and the hot and humid air in the cooling tower cannot enter. At this time, the cold air passage can only enter through the louver provided on the side wall of the cooling tower.

[0029] Further, the air door comprises a square rotating shaft, a rotating baffle and a fixed rod, and the square rotating shaft is supported by a square sliding bearing. The square rotating shaft has a large section moment of inertia and a strong bearing capacity, so that a small section rectangular rotating shaft can be used to reduce air resistance. The rotating baffle can rotate along the square rotating shaft. The rotating baffle is composed of a base plate, and the base plate is provided with a central convex groove and a reinforcing convex groove.

[0030] Further, the rotating baffle is preferably integrally formed. The rotating baffle is preferably made of FRP material, and the square sliding bearing is preferably made of PE material.

[0031] Further, the circulating hot water spraying system is composed of a circulating hot water spraying head.

[0032] According to a third aspect of the present application, the present application also provides a fog elimination cooling method, wherein the above-mentioned fog elimination cooling tower is applied.

[0033] The water-saving fog elimination tower of the present application utilizes cold air in the cold season to perform wall heat exchange with the wet hot air on the water spraying filler through the heat exchange fins in the water-saving fog elimination filler, so that the wet hot air is condensed, the condensed water is captured and recycled by the water collecting and baffle combining surface (i.e. multiple baffle surfaces and liquid film surfaces) on the heat exchange fins, the dry cold air from the outside is heated and the temperature is raised. Finally, the wet hot air and the dry cold air in the water-saving fog elimination filler are mixed to become unsaturated exhaust gas, which is discharged out of the tower through the fan, so as to achieve the purpose of water saving and fog elimination.

[0034] According to different operation time and operation load of the water-saving fog elimination tower, the water-saving fog elimination cooling tower of the present application can be divided into a water-saving fog elimination mode and a heat mode. In the water-saving fog elimination mode, the air door is closed, the louvers are opened, the cold air channel is communicated with the louvers, a part of the outside cold air is directly introduced into the water-saving fog elimination filler unit in the tower, and the cooling tower realizes water saving and fog elimination. In the heat mode, the air door is opened, the louvers are closed, and the outside (introduced through the water spraying filler air inlet) cold air passes through the water spraying filler, so that the cooling tower has the maximum circulating water cooling capacity.

[0035] The water-saving and mist-eliminating operation mode is as follows: the circulating hot water is uniformly sprayed on the water-spraying filler through the circulating hot water spraying head, the dry and cold air from outside enters into the water-spraying filler air inlet at the lower part of the tower body under the driving of the fan, flows upwards through the water-spraying filler, and is in countercurrent contact with the circulating hot water sprayed downwards above the water-spraying filler, so that mass and heat transfer is realized on the surface of the water-spraying filler, the circulating hot water is cooled, and enters into the water collecting pool below the water-spraying filler; the dry and cold air from outside passing through the water-spraying filler is heated, becomes saturated wet hot air, and leaves the water-spraying filler to enter into the wet hot air channel, and then enters into the mist-eliminating filler hot channel through the wet hot air channel. The cold air channel composed of the baffle and the air door, under the suction of the fan, the dry and cold air from outside enters into the cold air channel through the louver, and then enters into the cold channel of the mist-eliminating filler. Inside the mist-eliminating filler, the airflow first passes through the baffle structure, the water droplets in the airflow are collected under the action of inertial force and return to the tower by gravity, and the airflow further enters into the heat exchange sheet, the cold channel and the hot channel of the mist-eliminating filler are arranged alternately, the heat exchange sheet is used for wall heat transfer, the wet hot air is cooled, and the dry and cold air is heated. The liquid droplets condensed from the wet hot air are captured by the capturing surface and collected by the water collecting groove, flow down along the guide groove in the heat exchange sheet, and finally enter into the water collecting pool. The dry and cold air after being heated and the wet hot air after being condensed are mixed together after leaving the mist-eliminating filler, become unsaturated gas, and are discharged from the cooling tower by the fan.

[0036] The heat force operation mode is as follows: the cooling tower does not need to eliminate mist in summer, and the cooling tower needs to have the maximum cooling capacity when the cooling tower has high load in summer, and the heat force operation mode is as follows: the circulating hot water is uniformly sprayed on the water-spraying filler through the circulating hot water spraying head, the dry and cold air from outside enters into the tower body at the lower part under the driving of the fan, flows upwards through the water-spraying filler, and is in countercurrent contact with the circulating hot water sprayed downwards above the water-spraying filler, so that mass and heat transfer is realized on the surface of the water-spraying filler, the circulating hot water is cooled, and enters into the water collecting pool below the water-spraying filler; the dry and cold air from outside passing through the water-spraying filler is heated, becomes saturated wet hot air, and leaves the water-spraying filler to enter into the mist-eliminating channel. The air door of the mist-eliminating channel rotates to the vertical state around the rotating shaft, and the louver connected with the cold air channel is in the closed state, so that the wet hot air from the water-spraying filler enters into the mist-eliminating filler through the cold air channel and the wet hot air channel of the mist-eliminating channel, and the cold channel and the hot channel of the mist-eliminating filler are all used for the wet hot air. The wet hot air carries many liquid small water droplets, and the water droplets are collected through the baffle structure in the flow of the cold channel and the hot channel of the mist-eliminating filler, the wet hot air leaving the mist-eliminating filler is discharged from the cooling tower by the fan.

[0037] Compared with the prior art, the mist-eliminating filler and the water-saving and mist-eliminating cooling tower have the following beneficial effects:

[0038] 1. The mist elimination packing unit of the present application, the lower triangular shape of the heat exchange sheet is provided with a baffle structure, which can greatly increase the overall structural strength of the mist elimination packing on the one hand; on the other hand, when the wet hot air passes through the baffle structure, the tiny water droplets carried by the wet hot air strike the baffle structure, and the tiny liquid droplets are captured by the baffle under the action of inertial force and flow back to the tower by gravity. Preferably, a plurality of baffle surfaces are arranged on the heat exchange sheet of the mist elimination packing unit, the baffle surfaces are used to capture the liquid droplets carried in the gas flow, so that the liquid droplets are captured and flow to the water collecting tank after impacting on the baffle surfaces by inertia; part of the water flow in the water collecting tank can flow downward through the guide grooves at both ends, and the other part flows downward in the form of liquid film along the liquid film surface of the lower side wall of the water collecting tank, and together with the liquid droplets captured on the next baffle surface, enters the water collecting tank at the bottom end of the next baffle surface, to realize the collection and water collection of the liquid droplets and liquid film. The mist elimination packing unit of the present application can collect the condensate water adhered on the heat exchange sheet and guide it out, and the plurality of baffle surfaces and water collecting tanks also help to reduce the thickness of the liquid film, promote heat transfer, and enhance the water saving and mist elimination capacity. Therefore, the mist elimination packing unit of the present application has better water collecting and mist elimination effect, and the water saving and mist elimination tower containing the mist elimination packing unit of the present application can cancel the water collector layer of the traditional cooling tower.

[0039] 2. The water saving and mist elimination cooling tower of the present application, since the mist elimination packing has a significant water collecting function, the cooling tower can cancel the setting of the traditional water collector, the air door rotation space is sufficient, and the overall height of the tower can be reduced by 1-2 meters compared with the conventional technology.

[0040] 3. The water saving and mist elimination cooling tower of the present application, the wet hot air and the cold air enter the inside of the mist elimination packing unit through the air inlets on both sides of the lower triangular structure of the mist elimination packing. When the air initially enters the mist elimination packing, since the cold and hot channels are spaced apart from each other, the actual inlet area of the side surface of the lower triangular area of the mist elimination packing unit is reduced by half, the initial air speed entering the packing is equivalent to 1.4 times the tower cross section wind speed (for example, taking the right angle of the triangular top as the example), when the air enters the upper structure of the mist elimination packing through the cold and hot channels, the gas flow rate is reduced to the same as the tower cross section wind speed, and the pressure drop of the mist elimination packing unit and the mist elimination packing layer is only about 50% of the traditional technology.

[0041] 4. The water saving and mist elimination cooling tower of the present application, after the air enters the mist elimination packing, it finally leaves through the horizontal outlet at the top of the rectangular structure. Since the top horizontal outlet cold and hot channels are arranged at intervals, the air can be quickly and uniformly mixed after leaving the mist elimination packing through the top horizontal outlet cold and hot channels, the upper part of the water saving and mist elimination tower does not need additional mixing space, and the tower body height can be further reduced.

[0042] 5. The water saving and mist elimination cooling tower of the present application, the triangular shape bottom corner of the mist elimination packing unit is packaged by the baffle A, the baffle B and the triangular strip, which has high packaging strength and good sealing performance, can prevent the cold and hot air from mixing at this position, prevent the condensate water from entering the cold air channel, and is easy to install and construct.

[0043] 6、The fog elimination passage is provided with a rotary baffle of a damper, the rotary baffle of the damper is located in a vertical position in summer, the louvers are closed, and the hot and humid air is discharged from the cooling tower through the fog elimination filler cold and hot passages; the rotary baffle of the damper is located in a horizontal position in winter, the louvers are opened, the dry and cold air enters the fog elimination filler cold passage through the cold air passage, and the hot and humid air enters the fog elimination filler hot passage through the hot and humid air passage. The fog elimination cooling tower comprises two modes of water-saving fog elimination operation and heat operation, can meet the requirements of different seasons, and has the characteristics of flexible operation.

[0044] 7、The water-saving fog elimination cooling tower of the application, the fog elimination filler layer is formed by the side surfaces of a plurality of fog elimination filler units abutting each other. The installation cost of the fog elimination filler layer is low, and the fog elimination filler does not need to be integrally packaged, so that the cost of the whole tower is low.

[0045] 8、The water-saving fog elimination cooling tower of the application, the damper adopts a rectangular shaft, the rectangular shaft has a large inertia moment of section, and has strong bearing capacity, so that small-diameter shafts can be used, and the resistance of the damper in the cooling tower is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 It is a structural schematic view of the water-saving fog elimination cooling tower;

[0047] Figure 2 It is a structural schematic view of the heat exchange fin;

[0048] Figure 3 It is a structural schematic view of the fog elimination filler;

[0049] Figure 4 It is a sectional view of the fog elimination filler;

[0050] Figure 5 It is an installation schematic view of the fold surface A;

[0051] Figure 6 It is an installation schematic view of the fold surface B;

[0052] Figure 7 It is an installation schematic view of the triangular strip;

[0053] Figure 8 It is a structural schematic view of the rotary baffle;

[0054] Figure 9 It is a schematic view of the summer operation mode of the water-saving fog elimination tower;

[0055] Figure 10 It is a structural schematic view of the water collecting and flow deflecting combined surface.

[0056] In the figure, each number mark corresponds to the component name: 1 - air duct, 2 - fan, 3 - vertical straight edge, 4 - mist elimination filler, 5 - partition, 6 - air door, 7 - rotating shaft, 8 - circulating hot water spray head, 9 - water spraying filler, 10 - water spraying filler air inlet, 11 - louver, 12 - cold air passage, 13 - wet hot air passage, 14 - cold passage, 16 - baffle structure, 17 - triangular bottom corner (top corner), 18 - hot passage, 19 - heat exchange sheet, 20 - cold passage air outlet, 21 - hot passage air outlet, 22 - A sheet, 23 - B sheet, 25 - folded surface A, 26 - folded surface B, 27 - triangular strip, 28 - square sliding bearing, 29 - fixed rod, 30 - reinforcing beam, 33 - guide groove, 34 - water collecting groove; 35 - liquid film surface, 36 - baffle surface, 37 - vertical sealing edge surface, 38 - inclined sealing edge surface, 39 - hot passage air inlet, 40 - triangle, 42 - cold passage air inlet. DETAILED DESCRIPTION

[0057] The specific conditions of the present application are further illustrated by the following specific examples, but are not limited to the following examples.

[0058] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top", "bottom", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0059] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "set", "set", "connected", "connected", "installed" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] Example 1

[0061] In one specific embodiment, as Figures 4-5As shown, the defogging packing unit 4 of the present invention is composed of a plurality of vertically arranged heat exchange plates 19 stacked (or layered); the heat exchange plates 19 have vertical straight edges 3 on both sides, and the lower part connected to the vertical straight edges 3 on both sides is a triangle 40; the vertical straight edges 3 on opposite sides of the heat exchange plates 19 are provided with vertical sealing surfaces 37 to form relatively spaced hot channels 18 and cold channels 14; the opposite sides of the triangles of adjacent heat exchange plates 19 are alternately surrounded by oblique sealing surfaces 38 to form spaced hot channel air inlets 39 and cold channel air inlets 42.

[0062] The hot aisle air inlet 39 and the cold aisle air inlet 42 (i.e., the openings formed by the alternating oblique sealing surfaces 38 surrounding the opposite sides of the lower triangle of adjacent heat exchange plates 19) are spaced apart, and the other side of the triangle opposite to the hot aisle air inlet 39 and the cold aisle air inlet 42 is closed by the oblique sealing surface 37. The cold aisle 14 and the hot aisle 18 are spaced apart and do not intersect each other.

[0063] like Figure 1 As shown, the hot aisle air inlet and the cold aisle air inlet are located inside the hot and humid air aisle 13 and the cold air aisle 12 of the cooling tower, respectively.

[0064] The heat exchange plate 19 can be pentagonal, meaning the upper part of the two vertical sides is a horizontal side. Alternatively, the heat exchange plate can be hexagonal, meaning the upper part of the two vertical sides is also connected to a triangular structure.

[0065] The triangular portion of the heat exchanger 19 has a baffle structure 16 with a raised or grooved cross-section along and close to the hypotenuse. The cross-sectional shape of the raised or grooved section can be a suitable shape such as a triangle, rectangle, semicircle, or trapezoid. The apex of the lower triangle of the heat exchanger 19 points downward. The triangle is preferably an isosceles triangle, and its apex angle can be an obtuse angle, an acute angle, or a right angle, preferably a right angle.

[0066] Each heat exchanger fin 19 includes: a plurality of baffle surfaces 36, each baffle surface having a water collection trough 34 at its bottom end; and a liquid film surface 35 extending vertically downward along the lower side wall of the water collection trough. The baffle surface 36 is a plane with a certain inclination angle, the inclination angle being 0 to 90°, preferably 30 to 60°.

[0067] Furthermore, a guide channel 33 is also provided on the heat exchange plate 19. The guide channel runs vertically downward or inclined downward along the vertical edge of the heat exchange plate, and the cross-section of the guide channel is generally triangular or a small-radius semi-circular structure. The guide channel 33 can guide the water collected in the water collection tank to the bottom of the heat exchange plate 19 and return it to the tower by gravity. The two adjacent heat exchange plates A plate 22 and B plate 23 are preferably mirror-symmetric structures.

[0068] Furthermore, the hot aisle outlet 21 and the cold aisle outlet 20 are in the same direction and both face upwards. The hot aisle 18 and the cold aisle 14 are not connected inside the demisting packing unit. The longitudinal openings formed by the vertical edges 3 on both sides of the heat exchange fins are closed by the vertical sealing surface 37.

[0069] Furthermore, the heat exchanger material can be selected from PVC, PP or similar film composite materials, preferably PVC thermally conductive plastic.

[0070] Example 2

[0071] This embodiment provides a preferred encapsulation structure for the anti-fogging filler unit. For example... Figures 5-7 As shown, the defogging packing unit is formed by stacking and bonding heat exchange plates 19. The apex of the triangle of the heat exchange plates is sealed by bonding facets A 25 and B 26 respectively, and triangular strips 27 are bonded to the surfaces of facets A and B. Facets A and B are long, bent strips with a certain width and alternating bends. The included angle of the triangular strips is the same as the angle of the apex of the triangle. Facets A and B respectively seal the opening area where the hot aisle air inlet or cold aisle air inlet connects to the bottom corner 17 of the triangle shape, which can prevent the cross-contamination of hot and humid air and cold air at the triangular position and prevent condensate from flowing from the hot aisle to the cold aisle.

[0072] Example 3

[0073] This embodiment describes the structure of a defogging cooling tower. For example... Figure 1 As shown, the defogging cooling tower of the present invention includes a tower body, a water-spraying packing air inlet 10 at the lower part of the tower body, an air outlet at the upper end, an air duct 1 for air outlet guidance at the air outlet, and a fan 2 inside the air duct; a water-spraying packing 9 is provided above the water-spraying packing air inlet 10, and a spray unit 8 is provided above the water-spraying packing 9 for spraying hot water; an air damper 6 is provided above the spray unit 8, and a defogging packing layer 4 is provided above the air damper 6; the defogging packing layer is formed by the sides of multiple defogging packing units described in embodiments 1-2 abutting against each other.

[0074] like Figure 8 As shown, the defogging channel includes a baffle 5 and an air damper 6. The baffle and air damper divide the defogging channel system into a cold air channel 12 and a humid and hot air channel 13. The cold air channel 12 is connected to the louvers 11 on the side of the defogging cooling tower. The louvers 11 are installed on the side wall of the water-saving defogging cooling tower and also serve as the cold air inlet when the cooling tower is operating under defogging conditions.

[0075] The wet hot air channel and the cold air channel are not interpenetrated, the upper end of the partition plate 5 is connected and closed with the top corner 17 of the lower triangular bottom of the mist eliminating filler group, the lower ends of adjacent partition plates are provided with air doors 6 at intervals, and the lower end of the partition plate 6 is connected with the side edge of the air door 5. The partition plate, the air door and the mist eliminating filler layer form a cold air channel 12 (the air door is in a closed state, i.e. in a horizontal position), and the hot and wet air in the cooling tower cannot enter. At this time, the cold air channel can only enter through the louvers 11 arranged on the side wall of the cooling tower connected with the cold air channel.

[0076] The air door 5 comprises a square rotating shaft 7, a rotating baffle 6 and a fixed rod 29, and the square rotating shaft 7 is supported by a square sliding bearing 28. The square rotating shaft 7 has a large cross-sectional moment of inertia and strong bearing capacity, and a small cross-sectional size rectangular rotating shaft can be used to reduce the wind resistance. The rotating baffle 6 can rotate around the rotating shaft 7. The rotating baffle 6 is composed of a base plate, and the base plate is distributed with a central convex groove and a reinforcing beam 30, which plays a reinforcing role.

[0077] The rotating baffle 6 is preferably integrally formed. The rotating baffle is preferably made of FRP material, and the square sliding bearing is preferably made of PE material.

[0078] Example 4

[0079] The process of the mist eliminating operation mode of the water-saving and mist eliminating cooling tower is as follows:

[0080] The circulating hot water is sprayed on the water spraying filler 9 by the circulating hot water spraying unit 8, and the dry and cold air from outside is brought into the lower part of the tower by the fan 2, and flows upward through the water spraying filler 9, and contacts with the circulating hot water sprayed from above the water spraying filler 9, and mass and heat transfer on the surface of the water spraying filler 9, and the circulating hot water is cooled, and falls into the water collecting pool below the water spraying filler 9, and the dry and cold air from outside is heated and becomes saturated wet and hot air, and leaves the water spraying filler 9, and enters the wet and hot air channel 13, and enters the hot channel 18 of the mist eliminating filler 4 through the wet and hot air channel 13. The dampers 6 are closed, and the louvers are opened, and the cold air channel 12 composed of the partition 5 and the dampers 6 is connected with the louvers 11, and the dry and cold air from outside enters the cold air channel 12 through the louvers 11, and then enters the cold channel 14 of the mist eliminating filler 4. In the mist eliminating filler 4, the air flow first passes through the baffle structure 16, and the water droplets in the air flow are collected under the action of the inertial force and return to the tower by gravity, and the air flow further enters the mist eliminating filler 4, and the air flow is uniformly distributed in the mist eliminating filler 4, and the cold channel 14 and the hot channel 18 are arranged alternately, and the heat transfer occurs through the heat transfer sheet 19, and the wet and hot air is cooled, and the dry and cold air is heated. The liquid droplets condensed from the wet and hot air are captured by the baffle surface 36 and collected by the water collecting groove 34, and flow down along the guide groove 33 in the heat transfer sheet 19 and finally enter the water collecting pool below the inlet of the cooling tower. The dry and cold air after being heated and the wet and hot air after being condensed are mixed together and become unsaturated air, and are discharged from the cooling tower by the fan 2.

[0081] Example 5

[0082] The working process of the water-saving and mist-eliminating cooling tower in summer (i.e. the heat mode) is described in this embodiment: the circulating hot water is sprayed on the water spraying filler 9 by the circulating hot water spraying system 8, and the dry and cold air from outside is brought into the lower part of the tower by the fan 2, and flows upward through the water spraying filler 9, and contacts with the circulating hot water sprayed from above the water spraying filler 9, and mass and heat transfer on the surface of the water spraying filler 9, and the circulating hot water is cooled, and falls into the water collecting pool below the inlet of the cooling tower, and the dry and cold air from outside is heated and becomes saturated wet and hot air, and leaves the water spraying filler 9, and enters the mist eliminating channel. The dampers 6 of the mist eliminating channel rotate around the rotating shaft 7 to the vertical state (open), and the louvers 11 connected with the cold air channel 12 are in the closed state, and then the wet and hot air from the water spraying filler 9 enters the mist eliminating filler 4 through the cold air channel 12 and the wet and hot air channel 13 of the mist eliminating channel, and the cold channel 14 and the hot channel 18 of the mist eliminating filler 4 are filled with the wet and hot air. The wet and hot air carries many liquid water droplets, and the water droplets are collected by the baffle structure 16 when flowing in the cold channel 14 and the hot channel 18 of the mist eliminating filler 4, and the wet and hot air leaving the mist eliminating filler 4 is discharged from the cooling tower by the fan 2.

[0083] The above description is only the preferred embodiment of the present application, it should be pointed out that for the ordinary skilled in the art, without departing from the technical principles of the present application, can also make several improvements and variations, these improvements and variations should also be considered as the protection scope of the present application.

Claims

1. A mist eliminating filler unit, characterized in that, The mist-eliminating filler unit is composed of several vertically arranged heat exchange sheet stacks; The heat exchange sheet has vertical straight edges on both sides, and the lower part connected with the vertical straight edges on both sides is triangular; Opposite vertical straight edges of the heat exchange sheet are provided with vertical edge sealing surfaces, forming opposite spaced hot channels and cold channels; the air outlets of the hot channels and the cold channels are in the same direction and upward; Opposite sides between the triangles of adjacent heat exchange sheets are alternately surrounded by inclined edge sealing surfaces, forming spaced hot channel air inlets and cold channel air inlets; The heat exchange sheet is provided with protrusions or grooves along the inclined edges of the triangles and close to the inclined edges, and the protrusions or grooves are used for droplet aggregation and flow guiding; Each heat exchange sheet comprises: a plurality of baffle surfaces, the baffle surfaces being planes with a certain inclination angle; the bottom end of each baffle surface is provided with a water collecting groove; and a liquid film surface vertically extends downward along the lower side wall of the water collecting groove; The heat exchange sheet is also provided with a flow guiding groove, which vertically extends downward or obliquely downward along the vertical edge of the heat exchange sheet, and the flow guiding groove is used to provide a channel for water flow; the flow guiding groove is in communication with the water collecting groove; Part of the water flow in the water collecting groove flows downward through the flow guiding grooves at both ends, and the other part flows downward in the form of a liquid film along the liquid film surface of the lower side wall of the water collecting groove, and together with the droplets collected on the next layer of baffle surfaces, enters the water collecting groove at the bottom end of the next baffle surface, realizing the aggregation of droplets and liquid film and water collection.

2. The fog reducing filler unit of claim 1, wherein The heat exchange sheet is a pentagon, and the upper part of the heat exchange sheet is a rectangle, or the upper part of two vertical edges is a horizontal edge.

3. The fog reducing filler unit of claim 1, wherein, The cross section of the protrusion or groove is triangular, rectangular, semicircular or trapezoidal.

4. The fog reducing filler unit of claim 1, wherein, The triangle is an isosceles triangle.

5. The fog reducing filler unit of claim 1, wherein, The inclination angle is 30-60°.

6. The fog reducing filler unit of claim 1, wherein The material of the heat exchange sheet is selected from PVC or PP.

7. The fog reducing filler unit of claim 1, wherein The mist-eliminating filler unit is composed of several heat exchange sheets bonded together, the top corners of the triangular shapes of the heat exchange sheets are bonded and sealed by baffle surfaces A and B, and triangular strips are bonded on the surfaces of the baffle surfaces A and B; the baffle surfaces A and B are bent long strips bent in alternating directions with a certain width, and the included angle of the triangular strips is the same as that of the top corners of the triangles.

8. A mist elimination cooling tower characterized by, It comprises: The lower part of the tower body is provided with a water spraying filler air inlet, the upper part of the water spraying filler air inlet is provided with a water spraying filler, the upper part of the water spraying filler is provided with a spraying unit, the upper part of the spraying unit is provided with an air door and a mist-eliminating channel, the upper part of the air door and the mist-eliminating channel is provided with a mist-eliminating filler layer, and the upper end of the mist-eliminating filler layer is provided with an air outlet; the mist-eliminating filler layer is formed by the side surfaces of a plurality of mist-eliminating filler units according to any one of claims 1-7 abutting each other.

9. The mist elimination cooling tower of claim 8, wherein, The mist-eliminating channel comprises a partition plate and an air door, the partition plate divides the mist-eliminating channel system into a cold air channel and a hot and humid air channel, and the cold air channel is in communication with the louvers on the side surface of the water-saving and mist-eliminating cooling tower.

10. The mist elimination cooling tower of claim 9, wherein, The upper end of the partition plate is connected and closed with the top corner of the bottom triangle of the lower part of the mist-eliminating filler group, the lower ends of adjacent partition plates are spaced apart to form air doors, and the lower ends of the partition plates are connected with the side edges of the air doors.

11. The mist elimination cooling tower of claim 9, wherein, The air door comprises a square rotating shaft and a rotating baffle, the square rotating shaft is supported by a square sliding bearing, and the rotating baffle can rotate along the square rotating shaft.

12. The mist elimination cooling tower of claim 11, wherein, The mist-eliminating cooling tower has two operating modes: Water-saving and mist-eliminating operating mode: the air door is closed, the louvers are opened, and the cold air channel is in communication with the louvers; Thermal mode: the dampers are open, the louvers are closed.

13. A method of fog elimination and cooling, wherein a cooling tower according to any one of claims 8-12 is used.

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