Fog dissipation cooling tower and fog dissipation filler unit thereof

Abstract

The invention relates to the field of cooling towers, and discloses a fog dispersal cooling tower and a fog dispersal filler unit thereof.The fog dispersal filler unit comprises a plurality of heat exchange pieces which are arranged in a stacked mode, and the bottom edges and the opposite side edges of the adjacent heat exchange pieces are alternately connected in a sealed mode; the dry cold air flow channels and the wet hot air flow channels are alternately distributed in the stacking direction and can conduct heat exchange through the partition walls of the heat exchange pieces, and each dry cold air flow channel is provided with a pair of opposite cold channel air inlets located in the side edge position and a cold channel air outlet located in the top edge position of the corresponding heat exchange piece. The hot and humid air flow channel is provided with a hot channel air inlet located in the bottom edge position and a hot channel air outlet located in the top edge position of the heat exchange piece, and the hot channel air outlet and the cold channel air outlet are alternately distributed in the stacking direction. The fog dispersal filler unit can effectively reduce the resistance of a cold air channel, so that the cold air volume and flow velocity can be increased, the heat exchange coefficient is increased, and the fog dispersal effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of cooling towers, and in particular to a demisting filler unit. Based on this, the present invention also relates to a demisting cooling tower comprising the demisting filler unit. Background Art

[0002] In the petroleum, chemical and other industries, circulating water cooling systems are widely built. Traditional open cooling towers use water-spraying fillers to cool circulating water. The circulating hot water from the process device enters the cooling tower spray system, and forms spray circulating hot water through the water-spraying nozzle. The spray circulating hot water enters the water-spraying filler from top to bottom. The water-spraying filler is generally made of PVC sheets. Water enters the water-spraying filler and forms a water film along the PVC sheet. The dry and cold air from the outside enters the water-spraying filler from bottom to top, and exchanges heat with the water film. The water film evaporates and cools down, and the air is heated and humidified to form hot and humid air. The fan installed on the top of the cooling tower discharges the hot and humid air out of the tower, and the circulating hot water is cooled to become circulating cold water. The hot and humid air coming out of the upper part of the water-spraying filler is discharged out of the tower through the cooling tower wind pipe. Because the hot and humid air discharged out of the tower has high humidity and high temperature, when the ambient temperature is low, the hot and humid air is discharged out of the tower and mixed with the cold air. Due to cooling and condensation, a fog containing many tiny liquid particle groups is formed.

[0003] Chinese invention patent application CN113063304A discloses a demisting device and a cooling tower, which relates to the technical field of cooling towers. The demisting device includes: a stacked first flow path and a second flow path, which perform heat exchange between the first airflow and the second airflow; the first airflow flowing in from one side of the width direction of the demisting device is introduced into the first inlet of the first flow path; the second airflow flowing in from the bottom of the demisting device is introduced into the second inlet of the second flow path; the first airflow flowing out of the first flow path is discharged to the first outlet above the demisting device; the second airflow flowing out of the second flow path is discharged to the second outlet above the demisting device, and the demisting device can play a role in water-saving demisting. The cooling tower includes the demisting device as above.

[0004] The above-mentioned prior art has the following problems: 1. The length of the heat exchanger in the demisting environmental protection device is close to half the height of the demisting tower. The cold air channel inside the heat exchanger is irregular, and the resistance pressure drop is large. It is difficult for a large amount of cold air to enter the tower from outside the tower through the demisting heat exchanger, and the demisting effect is poor; 2. In the demisting heat exchanger, the cold air inlet and the cold channel and the hot channel are perpendicular to the side wall of the air inlet of the cooling tower water filling and close to the side wall. A switchable air gate structure is arranged in the middle. When the demisting is not in operation in summer, the hot and humid air coming from the water filling in the tower is extremely unevenly distributed in the tower, which seriously affects the air volume distribution in the water filling and affects the cooling effect. 3. In summer, the resistance of the demisting heat exchanger in the demisting tower is large, the total pressure increases, and the power consumption for cooling increases. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems of large resistance pressure drop and poor defogging effect when cold air flows through the defogging packing unit in the prior art, and to provide a defogging packing unit that can greatly reduce the resistance of the cold air channel, thereby improving the defogging effect by increasing the cold air volume and flow rate.

[0006] In order to achieve the above-mentioned objectives, the present invention provides, on the one hand, a demisting filler unit, comprising a plurality of stacked heat exchange plates, wherein the bottom edges and opposite side edges of adjacent heat exchange plates are alternately sealed and connected to each other to form dry cold air flow channels and moist hot air flow channels that are alternately distributed along the stacking direction and can exchange heat through the walls between the heat exchange plates, wherein the dry cold air flow channels have a pair of cold channel air inlets located at the side edges and opposite to each other, and a cold channel air outlet located at the top edge of the heat exchange plate, and the moist hot air flow channels have a hot channel air inlet located at the bottom edge and a hot channel air outlet located at the top edge of the heat exchange plate and alternately distributed with the cold channel air outlet along the stacking direction.

[0007] Preferably, the bottom edge of each of the heat exchange plates extends in a horizontal direction, and the opposite side edges extend in a vertical direction, so that the cold channel air inlets of each of the dry cold air flow channels are respectively horizontally opened and horizontally opposite to each other.

[0008] Preferably, the top edge of each of the heat exchange plates extends in a horizontal direction or is recessed toward the bottom edge, and the cold channel air outlet and the hot channel air outlet respectively extend over the entire length area of ​​the top edge, or, the top edges of adjacent heat exchange plates forming the dry cold air flow channel are sealed and connected at positions adjacent to the side edges, so that the cold channel air outlet extends in the middle part of the top edge.

[0009] Preferably, a baffle water collecting structure is formed at a position of the heat exchange plate near the hot channel air inlet, and the baffle water collecting structure is configured to at least partially change the flow direction of the airflow entering from the hot channel air inlet in the humid hot air flow channel to capture at least part of the moisture carried in the airflow. The cross-section of the baffle water collecting structure can be triangular, rectangular, semicircular or trapezoidal.

[0010] Preferably, the heat exchange plate is formed with a hot channel guide strip that protrudes toward the hot and humid air flow channel and extends in a vertical direction and / or a cold channel guide strip that protrudes toward the dry and cold air flow channel and extends in a horizontal direction. The protruding height of the hot channel guide strip and / or the cold channel guide strip is less than the thickness of the corresponding hot and humid air flow channel and the dry and cold air flow channel, and preferably is less than 1 / 4 of the thickness of the corresponding hot and humid air flow channel and the dry and cold air flow channel, respectively.

[0011] Preferably, columnar supports are formed on the heat exchange fins, extending in the dry cold air flow channel and / or the wet hot air flow channel and abutting against adjacent heat exchange fins.

[0012] The second aspect of the present invention provides a demisting cooling tower, which includes a tower body and a demisting packing layer, a spray unit and a water sprinkling packing layer arranged in the tower body from top to bottom, the demisting packing layer includes a plurality of groups of the above-mentioned demisting packing units, the tower body is formed with a cooling tower air inlet located at the lower side of the water sprinkling packing layer and a plurality of cold air inlet channels respectively connected to the cold channel air inlet, and the humid hot air rising from the water sprinkling packing layer can flow to the hot channel air inlet along with the cooling wind introduced from the cooling tower air inlet. The number of demisting packing units placed in the demisting cooling tower is greater than or equal to 2 groups. Preferably, the number of demisting packing units placed in the demisting cooling tower is greater than or equal to 4 groups.

[0013] Preferably, multiple groups of the demisting packing units are arranged horizontally and spaced apart from each other in the tower body, and the cold air intake channels are respectively located in the intervals between adjacent demisting packing units, and are connected to the cold channel air inlets of adjacent demisting packing units at the same time. Optionally, multiple groups of the demisting packing units can be connected to each other at the sides in the tower body, and by arranging the heat exchange fins to have a downwardly protruding trapezoidal bottom and arranging the cold channel air inlets on the two sides of the trapezoidal bottom, the cold air introduced by the pair of cold channel air inlets opposite to each other can also be utilized at the same time, and the arrangement density of the demisting packing units in the tower body can be increased.

[0014] Preferably, dampers which can be switched between an open position and a closed position are respectively provided on the upper and lower sides of the cold air intake channel. When the damper is switched to the closed position, the hot and humid air raised by the water sprinkling filler layer can only flow to the top of the defogging filler layer through the hot and humid air flow channel; when the damper is switched to the open position, the hot and humid air raised by the water sprinkling filler layer can flow to the top of the defogging filler layer through the hot and humid air flow channel and the cold air intake channel at the same time.

[0015] Preferably, a water collector is provided in the cold air inlet passage, and the hot and humid air rising from the water sprinkling filler layer flowing through the cold air inlet passage passes through the water collector and flows to above the demisting filler layer.

[0016] Through the above technical scheme, the demisting filler unit of the present invention has a pair of cold channel air inlets for introducing cold air. The introduced cold air relatively enters the demisting filler unit through the cold channel air inlets, and turns and flows to the cold channel air outlet. As a result, the flow length of the cold air in the dry cold air flow channel is significantly shortened, which can effectively reduce the resistance of the cold air channel, thereby increasing the cold air volume and flow rate, improving the heat exchange coefficient, and improving the demisting effect.

[0017] In addition, compared with the prior art, the demisting packing unit and demisting cooling tower of the preferred embodiment of the present invention can have the following beneficial effects:

[0018] 1. By setting dampers on the upper and lower sides of the cold air inlet channel of the defogging cooling tower, the dampers are all in a vertical state (open position) in the thermal operation mode (non-defogging condition). At this time, the hot and humid air coming up from the water-spraying filler in the tower can pass through the cold air inlet channel and the defogging filler unit at the same time. The defogging filler unit and the cold air inlet channel in the tower are evenly arranged, which will not cause a big disturbance to the flow of hot and humid air passing through the water-spraying filler in the tower, and the cooling effect of the whole tower is better.

[0019] 2. The cold air inlet channels arranged at intervals in the demisting cooling tower can greatly reduce the pressure drop in the tower under thermal operation mode. For example, when operating in summer, the resistance increased by adding a demisting layer is reduced by more than 50%.

[0020] 3. The demisting packing unit of the present invention can be provided with a deflection water collecting structure at the lower part of the heat exchange plate, which can greatly increase the overall structural strength of the demisting packing unit on the one hand; on the other hand, when the hot and humid air passes through the deflection water collecting structure, the tiny water droplets it carries hit the deflection water collecting structure, and the tiny droplets are captured by the deflection under the action of inertial force and flow back into the tower by gravity. Its water collecting and demisting function is better than that of ordinary tower water collectors.

[0021] 4. The demisting cooling tower of the present invention has a significant water collection function because the demisting packing unit has a special double cold channel air inlet on both sides. The height of the entire tower is only increased by 1-2 meters compared with conventional ordinary tower technology, but the demisting effect is significantly improved.

[0022] 5. In the demisting cooling tower of the present invention, the cold air and hot air after heat exchange leave from the top of the demisting packing layer, and can be quickly and evenly mixed after leaving the demisting packing layer. No additional mixing space is required at the top of the demisting cooling tower, and the height of the tower body can be further reduced.

[0023] 6. The defogging filler unit of the present invention can have a horizontal bottom, which is convenient for horizontal placement of the defogging filler layer, easy installation and low cost.

[0024] 7. The cold air inlet channel of the demisting cooling tower is provided with a rotating baffle plate with air doors on the upper and lower sides. In summer, the rotating baffle plate of the air door is in a vertical position, the shutters are closed, and the hot and humid air is discharged from the cooling tower through the hot and humid air flow channel and the dry and cold air flow channel of the demisting packing unit at the same time; in winter, the rotating baffle plate of the air door is in a horizontal position, the shutters are opened, and the dry and cold air enters the dry and cold air flow channel of the demisting packing unit through the cold air inlet channel, and the hot and humid air enters the hot and humid air flow channel of the demisting packing unit. The demisting cooling tower of the present invention includes two modes: water collection and demisting operation and thermal operation, which can be respectively applied to the needs of different seasons and have the characteristics of flexible operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of a demisting filler unit according to a preferred embodiment of the present invention;

[0026] Figure 2 Observed from another perspective Figure 1 Schematic diagram of the mist dispelling packing unit;

[0027] Figure 3 Yes means Figure 1 A cross-sectional schematic diagram of the baffled water collecting structure in the middle mist dissipating filler unit;

[0028] Figure 4 It is a schematic diagram showing the flow direction of cold air through the dry cold air flow channel;

[0029] Figure 5 It is a schematic diagram showing the flow direction of hot and humid air through the hot and humid air flow channel;

[0030] Figure 6 is a structural schematic diagram of a mist-eliminating cooling tower in a mist-eliminating operation mode according to a preferred embodiment of the present invention;

[0031] Figure 7 yes Figure 6 The schematic diagram of the structure of the mist elimination cooling tower in the non-mist elimination operation mode;

[0032] Figure 8 is a schematic diagram of a modified embodiment of a mist elimination packing unit according to the present invention;

[0033] Fig. 9 is a schematic diagram of another modified embodiment of the mist elimination filling unit according to the present invention;

[0034] Fig.10 is a schematic diagram of a demisting filler unit according to another preferred embodiment of the present invention;

[0035] Fig.11 yes Fig.10 A partial enlarged view of the upper part of the middle mist elimination packing unit;

[0036] Fig.12 yes Fig.10 A partial enlarged view of the lower part of the middle mist elimination packing unit;

[0037] Fig.13 yes Fig.10 Partial detail structure diagram of the medium mist elimination filler unit.

[0038] Description of Reference Numerals

[0039] 1001-heat exchange plate; 1002-baffle water collection structure; 1003-cold channel air inlet; 1004-vertical edge sealing surface; 1005-vertical sealing surface; 1006-hot channel air outlet; 1007-cold channel air outlet; 1008-horizontal edge sealing surface; 1009-hot channel air inlet; 1010-horizontal sealing surface; 1011-dry cold air flow channel; 1012-humid hot air flow channel; 1013-bottom edge; 1014-top edge; 1015-dry cold air; 1016-side edge; 1017-humid hot air;

[0040] 2001- mist dispelling packing unit; 2002- cooling tower air inlet; 2003- water spraying packing layer; 2004- spray unit; 2005- tower body; 2006- water collector; 2007- damper; 2008- wind tube; 2009- fan; 2010- mist dispelling packing layer; 2011- shutter; 2012- cold air intake channel;

[0041] 3001-heat exchange plate; 3002-horizontal sealing surface; 3003-horizontal edge sealing surface; 3004-hot channel air outlet; 3005-cold channel air outlet; 3006-cold channel air inlet; 3007-vertical edge sealing surface; 3008-vertical sealing surface; 3009-baffle water collection structure;

[0042] 4001-heat exchange plate; 4002-horizontal sealing surface; 4003-horizontal edge sealing surface; 4004-hot channel air outlet; 4005-cold channel air outlet; 4006-cold channel air inlet; 4007-vertical edge sealing surface; 4008-vertical sealing surface; 4009-baffle water collection structure;

[0043] 5001-heat exchange plate; 5002-cold channel air inlet; 5003-baffle water collection structure; 5004-columnar support; 5005-hot channel guide strip; 5006-cold channel air outlet; 5007-hot channel air outlet; 5008-spoiler strip; 5009-cold channel guide strip; 5010-hot channel air inlet; 5011-vertical edge sealing surface; 5012-vertical sealing surface. DETAILED DESCRIPTION

[0044] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0045] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top", "bottom", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "placed", "connected", "connected", "installed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Figures 1 to 13 A demisting packing unit of various different embodiments and a demisting cooling tower having the same are provided, wherein the demisting packing unit comprises a plurality of heat exchange plates arranged in a stack, wherein the bottom edges and the opposite side edges of adjacent heat exchange plates are alternately sealed and connected to each other, so as to form dry cold air flow channels and moist hot air flow channels which are alternately distributed along the stacking direction and can exchange heat through the walls between the heat exchange plates. The dry cold air flow channel has a pair of cold channel air inlets located at the side positions and facing each other, and a cold channel air outlet located at the top edge position of the heat exchange plate, and the moist hot air flow channel has a hot channel air inlet located at the bottom edge position, and a hot channel air outlet located at the top edge position of the heat exchange plate and alternately distributed with the cold channel air outlet along the stacking direction. For example, in Figure 1 and Figure 2 The figure schematically shows six heat exchange fins stacked from left to right, wherein the first heat exchange fin is sealed to the second heat exchange fin at the bottom edge, and the sides on both sides are separated from each other to form a pair of cold channel air inlets; the second heat exchange fin is sealed to the third heat exchange fin at two side edges, and the bottom edges are separated from each other to form a hot channel air inlet; and so on, thereby forming dry cold air flow channels and wet hot air flow channels that are alternately distributed along the stacking direction and can exchange heat through the walls between the heat exchange fins.

[0048] Since there is a pair of cold channel air inlets for introducing cold air, the introduced cold air relatively enters the defogging filler unit through the cold channel air inlets, and turns therein and flows to the cold channel air outlet, thereby significantly shortening the flow length of the cold air in the dry cold air flow channel, which can effectively reduce the resistance of the cold air channel, thereby increasing the cold air volume and flow rate, improving the heat exchange coefficient, and improving the defogging effect. In particular, the opposite sides of the heat exchange plate can be arranged to extend in the vertical direction, and the flow length of the cold air in the dry cold air flow channel is only half or less of the width of the heat exchange plate, and the resistance of the cold air channel can be reduced by about 50% or even higher, which can significantly improve the defogging effect.

[0049] exist Figure 6 and Figure 7 In the demisting cooling tower shown, multiple groups of demisting packing units 2001 are arranged horizontally and spaced apart from each other in the tower body 2005, and the cold air intake channel 2012 for introducing cold air is located in the interval between adjacent demisting packing units 2001, without reserving a channel space for introducing cold air in the height space between the demisting packing layer 2010 and the spray unit 2004, thereby reducing the occupation of the height space and facilitating avoiding the excessive height of the entire tower. In addition, by providing dampers that can be switched between an open position and a closed position on the upper and lower sides of the cold air intake channel, the demisting cooling tower can be allowed to operate in a water collection demisting mode or a thermal operation mode as required, thereby, in summer, the damper is switched to an open position ( Figure 7 ), the shutters 2011 on the side walls of the tower are closed, and the hot and humid air flows upward to the top of the demisting packing layer 2010 through the hot and humid air flow channel and the dry and cold air flow channel of the demisting packing unit 2011 and the cold air inlet channel 2012, and is discharged from the cooling tower; in winter, the damper is switched to the closed position ( Figure 6 ), the shutter 2011 is opened, dry cold air enters the dry cold air flow channel of the defogging packing unit 2011 through the cold air inlet channel 2012, and humid hot air enters the humid hot air flow channel of the defogging packing unit, so that the water vapor in the humid hot air is condensed and falls back into the tower through the heat exchange of the partition wall, thereby achieving the purpose of defogging.

[0050] The following describes various different embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that these embodiments are only exemplary, and the technical features in different embodiments can be used interchangeably without violating the technical principles thereof to form other more embodiments falling within the scope of the present invention.

[0051] Embodiment 1:

[0052] This embodiment provides a preferred structure of the demisting filler unit.

[0053] like Figures 1 to 5, a defogging packing unit 2001 is provided, the defogging packing unit 2001 comprises a plurality of vertically arranged and stacked heat exchange plates 1001, and adjacent heat exchange plates 1001 form a dry cold air flow channel 1011 and a moist hot air flow channel 1012 arranged at intervals. The dry cold air flow channel 1011 is used to circulate dry cold air 1015 from the external environment, and the moist hot air flow channel 1012 is used to circulate moist hot air 1017 rising from the water-spraying packing, and the two air flows have a temperature difference and exchange heat through the wall between the heat exchange plates.

[0054] The left and right sides of the heat exchanger 1001 have side edges 1016, and the upper and lower sides have top edges 1014 and bottom edges 1013. The side edges 1016 on both sides of the heat exchanger 1001 are provided with vertical edge sealing surfaces 1004, the vertical edge sealing surfaces 1004 on both sides of the same heat exchanger 1001 have the same deflection direction, and the vertical edge sealing surfaces 1004 on both sides of adjacent heat exchanger 1001 have opposite deflection directions, the bottom edge 1014 of the heat exchanger 1001 is deflected to form a horizontal edge sealing surface 1008, and the deflection direction is opposite to the vertical edge sealing surface 1004 of the heat exchanger 1001, and the horizontal edge sealing surfaces 1008 of adjacent heat exchanger 1001 have opposite deflection directions.

[0055] Adjacent vertical edge sealing surfaces 1004 are sealed by gluing the vertical sealing surfaces 1005 connected thereto, and adjacent horizontal edge sealing surfaces 1008 are sealed by gluing the horizontal sealing surfaces 1010 connected thereto.

[0056] The adjacent heat exchanger plates 1001 respectively form cold channel air inlets 1003 on the side of the side edges 1016 on both sides where no vertical sealing surface is provided, and the adjacent heat exchanger plates form hot channel air inlets 1009 on the side of the bottom edge 1013 where no horizontal sealing surface is provided. The dry cold air 1015 enters the dry cold air flow channel 1011 inside the defogging packing unit through the paired cold channel air inlets 1003 on both sides of the defogging packing unit 2001, and the humid hot air 1017 rising from the water-spraying packing enters the humid hot air flow channel 1012 inside the defogging packing unit from the hot channel air inlet 1009.

[0057] like Figure 4 As shown, through the cold channel air inlets 1003 on both sides of the demisting filler unit, the dry cold airflow 1015 enters the dry cold airflow channel 1011 in a horizontal direction and the inflow directions are opposite.

[0058] like Figure 1 , Figure 4 and Figure 5As shown, the top edges 1014 of the upper parts of the adjacent heat exchange fins 1001 constitute hot channel air outlets 1006 and cold channel air outlets 1007 that are alternately arranged. The hot channel air outlets 1006 and the cold channel air outlets 1007 are in the same direction and both face upward. The moist hot air flow channel 1012 and the dry cold air flow channel 1011 are not connected inside the defogging packing unit 2001, and the cold air and hot air that complete the heat exchange inside the defogging packing unit 2001 are discharged upward from the hot and cold channel air outlets 1007 and the channel air outlets 1006, respectively.

[0059] like Figure 1 and Figure 3 As shown, a baffle and water collecting structure 1002 with the same-direction protrusions or depressions is provided near the bottom edge 1013 of the heat exchange plate 1001. The hot and humid air 1017 entering the hot and humid air flow channel 1012 first passes through the baffle and water collecting structure 1002, and the entrained spray droplets are captured by the baffle and water collecting structure.

[0060] Embodiment 2:

[0061] By using the demisting filler unit 2001 in the first embodiment, this embodiment provides a demisting cooling tower structure.

[0062] like Figure 6 As shown, the demisting cooling tower of the present invention includes a tower body 2005, and the lower part of the tower body is a cooling tower air inlet 2002, a water sprinkling filler layer 2003 is provided on the upper side of the cooling tower air inlet 2002, a spray unit 2004 for spreading circulating water is provided on the upper side of the water sprinkling filler layer 2003, and the upper side of the spray unit 2004 has a cold air inlet channel 2012 and demisting filler units 2001 arranged at intervals, and a plurality of demisting filler units 2001 form a demisting filler layer 2010, and a fan 2009 and a wind tube 2008 located at the top of the tower body 2005 are provided above the demisting filler layer 2010.

[0063] The intervally arranged demisting filler units 2001 and the cold air intake passage 2012 are arranged on the same horizontal plane.

[0064] The cold air inlet passage 2012 of the defogging cooling tower is connected to the shutter 2011 on the side wall of the tower body, and the dry cold air flow 1015 can enter the cold air inlet passage 2012 through the shutter 2011. The upper and lower parts of the cold air inlet passage 2012 are respectively provided with deflectable dampers 2007 so as to be switchable between an open position and a closed position. The damper 2007 can rotate along the rotation axis in the middle thereof and can be in a horizontal position (defogging working condition) or a vertical position (non-defogging working condition).

[0065] In the demisting cooling tower, the cold channel air inlets 1003 on both sides of each demisting filler unit 2001 are respectively communicated with the cold air inlet channels 2012 adjacent to the two sides of the demisting filler unit.

[0066] A horizontally arranged water collector 2006 is provided in the middle of the cold air intake passage 2012 .

[0067] In the demisting cooling tower, four groups of demisting filler units 2001 are arranged.

[0068] The dry cold air 1015 can enter the cold channel air inlet 1003 of the defogging packing unit connected to the cold air inlet channel 2012 horizontally through the louver 2011, and further enter the defogging packing unit; the moist hot air 1017 with spray droplets rising from the water spraying packing layer 2003 enters the moist hot air flow channel 1012 from the bottom of the defogging packing unit through the hot channel air inlet 1009. When the moist hot air 1017 with spray droplets enters the moist hot air flow channel 1012, it first passes through the baffle water collecting structure 1002, and the moist hot air 1017 with spray droplets is baffled by the baffle water collecting structure 1002. In this process, because the density of the spray droplets entrained by the moist hot air is much higher than that of the moist hot air, the inertia is larger, and the entrained spray droplets hit the windward surface of the baffle water collecting structure 1002, and the spray droplets entrained by the moist hot air are captured and removed by the baffle water collecting structure 1002.

[0069] After that, the hot and humid air 1017 passes through the baffle water collecting structure and further enters the hot channel 1012 of the mist elimination packing, and exchanges heat with the dry and cold air entering the dry and cold air flow channel 1011 from the cold channel air inlet 1003 through the heat exchange plate, and the hot and humid air is condensed. Due to the heat exchange with the dry and cold air, the temperature of the hot and humid air decreases, and the saturated hot and humid air precipitates condensed water as the temperature decreases, and flows back into the tower under the action of gravity.

[0070] After the hot and cold air flows exchange heat in the above-mentioned demisting packing unit, the dry cold air 1015 from the outside is heated and the temperature rises, and the humid hot air 1017 is cooled down. The dry cold air 1017 entering from the cold channel air inlets on the opposite sides of the demisting packing unit turns upward in the packing. Finally, the cooled humid hot air 1017 and the heated dry cold air 1015 leave the water-absorbing demisting packing layer through the hot channel air outlet 1006 and the cold channel air outlet 1007 respectively and mix to become unsaturated air, which is discharged out of the tower under the action of the fan 2009, thereby achieving the purpose of water collection and demisting.

[0071] The water-collecting and mist-dispelling cooling tower of the present invention is divided into a water-collecting and mist-dispelling operation mode and a thermal operation mode. In the water-collecting and mist-dispelling mode, a part of the external cold air is directly introduced into the water-collecting and mist-dispelling filler in the tower to realize the water-collecting and mist-dispelling of the cooling tower. In the thermal operation mode, all the external cold air passes through the water-spraying filler, and at this time, the cooling tower has the maximum circulating water cooling capacity.

[0072] In the water collecting and mist eliminating operation mode, the dampers 2007 on both sides of the cold air inlet channel 2012 are all in the horizontal position (closed position). The circulating hot water is evenly sprayed on the water spraying filler layer 2003 through the spray unit 2004. Driven by the fan 2009, the dry cold air from the outside enters from the cooling tower air inlet 2002 at the bottom of the tower body, flows upward through the water spraying filler layer 2003, and countercurrently contacts the circulating hot water sprayed from the top of the water spraying filler layer. Mass and heat transfer occurs on the surface of the water spraying filler, and the circulating hot water is cooled and enters the water collection tank below the water spraying filler. The dry cold air from the outside that passes through the water spraying filler is heated and becomes saturated hot and humid air 1017, leaving the water spraying filler, passing over the spray unit 2004 and reaching the lower side of the mist eliminating filler layer 2010. The hot and humid air 1017 enters the interior of the defogging packing unit through the hot channel air inlet 1009 of the defogging packing unit. Under the suction action of the fan, the external dry and cold air 1015 enters the cold air inlet channel defined by the upper and lower air doors 2007 of the cold air channel 2012 and the cold channel air inlet of the defogging packing unit through the opened shutters 2011, and then enters the dry and cold air flow channel 1011 of the defogging packing unit. Inside the defogging packing unit, the dry and cold air and the hot and humid air undergo inter-wall heat transfer through the heat exchange plate, the hot and humid air is cooled, and the dry and cold air is heated. The condensed water produced by the hot and humid air returns to the tower by gravity. After the heated dry and cold air turns upward from the horizontal, it is mixed with the condensed hot and humid air and leaves the defogging packing layer upward, becoming unsaturated gas and discharged from the cooling tower through the fan.

[0073] In summer, the cooling tower does not need to eliminate mist. At the same time, the cooling tower has a high operating load in summer, and the cooling tower needs to have maximum cooling capacity. It can be operated in thermal operation mode. Figure 7As shown, the dampers 2007 on both sides of the cold air inlet channel 2012 are all in the vertical position (open position). The circulating hot water is evenly sprayed on the water-spraying filler layer 2003 through the spray unit 2004. Driven by the fan 2009, the dry cold air from the outside enters the cooling tower air inlet 2002 at the lower part of the tower body, flows upward through the water-spraying filler layer 2003, and countercurrently contacts the circulating hot water sprayed from the top of the water-spraying filler layer 2003. Mass and heat are transferred on the surface of the water-spraying filler, and the circulating hot water is cooled and enters the water collection tank below the water-spraying filler. The dry cold air from the outside that passes through the water-spraying filler is heated and becomes saturated hot and humid air 1017. After the moist hot air leaves the water-spraying filler and passes through the spray unit 2004, it becomes two parts of saturated moist hot air, one part of which passes through the hot channel air inlet 1009 of the mist-eliminating filler unit, passes through the baffle water-collecting structure 1002, enters the moist hot air flow channel 1012, and leaves upward from the hot channel air outlet 1006 above the mist-eliminating filler unit; the other part flows through the cold air inlet channel, removes the entrained droplets when passing through the water collector 2006 arranged in the middle of the cold air inlet channel 1012, and then leaves upward. The two streams of moist hot air without entrained droplets are finally discharged from the cooling tower through the fan and the air duct.

[0074] Embodiment 3:

[0075] This embodiment provides a first deformation mode of the demisting filler unit.

[0076] like Figure 8 As shown, the defogging packing unit is composed of a plurality of vertically arranged heat exchange fins 3001 stacked together, and adjacent heat exchange fins 3001 form a dry cold air flow channel and a moist hot air flow channel arranged at intervals. The dry cold air flow channel is used to circulate dry cold air from the external environment, and the moist hot air flow channel is used to circulate moist hot air rising from the water-spraying packing. The two air flows have a temperature difference and exchange heat through the walls between the heat exchange fins.

[0077] The heat exchanger plate 3001 has side edges on the left and right sides, and horizontal top edges and bottom edges on the upper and lower sides. The side edges of the heat exchanger plate are provided with vertical edge sealing surfaces 3007 deflected in the same direction, and the vertical edge sealing surfaces 3007 on both sides of adjacent heat exchanger plates are deflected in opposite directions. The bottom edge of the heat exchanger plate is provided with a horizontal edge sealing surface, and the deflection direction is opposite to that of the vertical edge sealing surface, and the horizontal edge sealing surfaces of adjacent heat exchanger plates are deflected in opposite directions.

[0078] Adjacent vertical edge sealing surfaces 3007 are sealed by gluing the vertical sealing surfaces 3008 connected thereto, and adjacent horizontal edge sealing surfaces are sealed by gluing the horizontal sealing surfaces connected thereto.

[0079] Adjacent heat exchange fins are spaced apart on the sides of both sides where no vertical sealing surface 3007 is provided to form cold channel air inlets 3006 respectively, and adjacent heat exchange fins are spaced apart on the sides of the bottom where no horizontal sealing surface is provided to form hot channel air inlets. Dry cold air enters the dry cold air flow channel inside the defogging packing unit through the cold channel air inlets 3006 on both sides of the defogging packing unit, and the humid hot air rising from the water-spraying packing enters the humid hot air flow channel inside the defogging packing from the hot channel air inlet.

[0080] Through the cold channel air inlets 3006 on both sides of the demisting filler unit, the dry cold airflow enters the dry cold airflow channel in a horizontal direction and the inflow directions are opposite.

[0081] The top edges of adjacent heat exchange fins are spaced apart from each other to form alternately distributed hot channel air outlets 3004 and cold channel air outlets 3005. The hot channel air outlets 3004 and cold channel air outlets 3005 of the defogging packing unit are in the same direction and both face upward. The wet hot air flow channel and the dry cold air flow channel are not connected inside the defogging packing unit, and the cold air and the hot air that complete the heat exchange inside the defogging packing unit are discharged upward from the hot channel air outlets 3004 and the cold channel air outlets 3005, respectively.

[0082] The heat exchange plate of the demisting filler unit is provided with a baffled water collecting structure 3009 with the same direction protrusions or depressions near the bottom edge. The hot and humid air entering the hot and humid air flow channel first passes through the baffled water collecting structure 3009, and the entrained spray droplets are captured by the baffled water collecting structure.

[0083] The top edges of adjacent heat exchange fins of the demisting packing unit are provided with horizontal sealing surfaces 3003 near the two side edges, and the horizontal sealing surfaces 3003 of each heat exchange fin are bent in the same direction, and the horizontal sealing surfaces 3003 of adjacent heat exchange fins are bent in opposite directions, and are bonded and sealed to each other through horizontal sealing surfaces 3002. The rest of the top edge is kept spaced apart from each other, so that the cold channel air outlet 3005 only extends in the middle part of the top edge, which can ensure the flow path length of the dry cold airflow in the dry cold airflow channel and the heat exchange effect.

[0084] Embodiment 4:

[0085] This embodiment provides a second variation of the demisting filler unit.

[0086] like Fig. 9 The defogging packing unit is composed of a plurality of vertically arranged heat exchange fins 4001 stacked together, and adjacent heat exchange fins 4001 form a dry cold air flow channel and a moist hot air flow channel arranged at intervals. The dry cold air flow channel is used to circulate dry cold air from the external environment, and the moist hot air flow channel is used to circulate moist hot air rising from the water-spraying packing. The two air flows have a temperature difference and exchange heat through the wall between the heat exchange fins.

[0087] The heat exchanger 4001 has side edges on the left and right sides, and has top edges and bottom edges on the upper and lower sides. The portion of the top edge close to the two side edges is a horizontal short edge, and the remaining portion is V-shaped.

[0088] The two side edges of the heat exchanger fins 4001 are provided with vertical edge sealing surfaces 4007 deflected in the same direction, and the two side edges of adjacent heat exchanger fins 4001 are deflected in opposite directions. The bottom edge of the heat exchanger fin is deflected to form a horizontal edge sealing surface, and the deflection direction is opposite to the vertical edge sealing surface. The horizontal edge sealing surfaces of adjacent heat exchanger fins are deflected in opposite directions. Adjacent vertical edge sealing surfaces are sealed by gluing the vertical sealing surfaces 4008 connected thereto, and adjacent horizontal edge sealing surfaces are sealed by gluing the horizontal sealing surfaces connected thereto.

[0089] Adjacent heat exchange fins are spaced apart on the sides of both sides where no vertical sealing surface is provided, so as to respectively form cold channel air inlets 4006, and adjacent heat exchange fins are spaced apart on the sides of the bottom where no horizontal sealing surface is provided to form hot channel air inlets. Dry cold air enters the dry cold air flow channel inside the defogging packing unit through the cold channel air inlets 4006 on both sides of the defogging packing unit, and the humid hot air rising from the water spraying packing enters the humid hot air flow channel inside the defogging packing unit from the hot channel air inlet.

[0090] Through the cold channel air inlets 4006 on both sides of the demisting filler unit, the dry cold airflow enters the dry cold airflow channel in a horizontal direction and the inflow directions are opposite.

[0091] The top edges of adjacent heat exchange plates that define the moist hot air flow channel constitute spaced hot channel air outlets 4004 that extend over the entire length of the top edge; the top edges of adjacent heat exchange plates that define the dry cold air flow channel are sealed and connected at positions adjacent to the side edges, and constitute cold channel air outlets 4005 that extend in the middle portion of the top edge.

[0092] The hot channel air outlet 4004 and the cold channel air outlet 4005 of the demisting packing unit are in the same direction and both face upward. The wet hot air flow channel and the dry cold air flow channel are not connected inside the demisting packing unit, and the cold air and hot air that have completed the heat exchange inside the demisting packing unit are discharged upward from the hot channel air outlet 4004 and the cold channel air outlet 4005 respectively.

[0093] The heat exchange plate of the demisting filler unit is provided with a baffled water collecting structure 4009 with the same direction protrusions or depressions near the bottom edge. The hot and humid air entering the hot and humid air flow channel first passes through the baffled water collecting structure 4009, and the entrained spray droplets are captured by the baffled water collecting structure.

[0094] The top edges of adjacent heat exchange fins of the demisting packing unit are provided with horizontal sealing surfaces 4003 near the two side edges, and the horizontal sealing surfaces 4003 of each heat exchange fin are bent in the same direction, and the horizontal sealing surfaces 4003 of adjacent heat exchange fins are bent in opposite directions, and are bonded and sealed to each other through the horizontal sealing surfaces 4003. The rest of the top edge is kept spaced apart from each other, so that the cold channel air outlet 3005 only extends in the middle part of the top edge, which can ensure the flow path length of the dry cold airflow in the dry cold airflow channel and the heat exchange effect.

[0095] Since the dry cold air enters the demisting filler unit through the cold channel air inlets 4006 on both sides and turns inside to flow upward, the flow rate of the turned and upward flow is approximately twice the flow rate of the cold air at the cold channel air inlet 4006, and the resistance is increased. The V-shaped outlet can effectively reduce the resistance of the cold air from the left and right sides converging upward.

[0096] Embodiment 5:

[0097] This embodiment provides a third variation of the demisting filler unit.

[0098] like Figures 10 to 13 The defogging packing unit is composed of a plurality of vertically arranged heat exchange fins 5001 stacked together, and adjacent heat exchange fins 5001 form a dry cold air flow channel and a moist hot air flow channel arranged at intervals. The dry cold air flow channel is used to circulate dry cold air from the external environment, and the moist hot air flow channel is used to circulate moist hot air rising from the water-spraying packing. The two air flows have a temperature difference and exchange heat through the wall between the heat exchange fins.

[0099] The heat exchange plate 5001 is generally rectangular, with side edges on the left and right sides, and top and bottom edges on the upper and lower sides.

[0100] The two sides of the heat exchanger 5001 are provided with vertical edge sealing surfaces 5011 deflected in the same direction, and the vertical edge sealing surfaces on both sides of adjacent heat exchanger fins 5001 are deflected in opposite directions. The bottom edge of the heat exchanger fin 5001 is deflected to form a horizontal edge sealing surface, and the deflection direction is opposite to the vertical edge sealing surface of the heat exchanger fin, and the horizontal edge sealing surfaces of adjacent heat exchanger fins are deflected in opposite directions. Adjacent vertical edge sealing surfaces 5011 are sealed by gluing the vertical sealing surfaces 5012 connected thereto, and adjacent horizontal edge sealing surfaces are sealed by gluing the horizontal sealing surfaces connected thereto.

[0101] Adjacent heat exchange fins are separated from each other on the side of both sides where no vertical sealing surface is provided, so as to respectively form cold channel air inlets 5002, and adjacent heat exchange fins are separated from each other on the side of the bottom where no horizontal sealing surface is provided, so as to form hot channel air inlets 5010. Dry cold air enters the dry cold air flow channel inside the defogging packing unit through the cold channel air inlets 5002 on both sides of the defogging packing unit, and the humid hot air rising from the water spraying packing enters the humid hot air flow channel inside the defogging packing unit from the hot channel air inlet 5010.

[0102] Through the cold channel air inlets 5002 on both sides of the demisting filler unit, the dry cold airflow enters the dry cold airflow channel in a horizontal direction and the inflow directions are opposite.

[0103] The top edges of adjacent heat exchange fins are spaced apart from each other, forming alternately distributed hot channel air outlets 5007 and cold channel air outlets 5006. The hot channel air outlets 5007 and cold channel air outlets 5006 of the defogging packing unit are in the same direction and both face upward. The wet hot air flow channel and the dry cold air flow channel are not connected inside the defogging packing unit, and the cold air and hot air that have completed heat exchange inside the defogging packing unit are discharged upward from the hot channel air outlet 5007 and the cold channel air outlet 5007, respectively.

[0104] The heat exchange plate of the demisting filler unit is provided with a baffled water collecting structure 5003 with the same direction protrusions or depressions near the bottom edge. The hot and humid air entering the hot and humid air flow channel first passes through the baffled water collecting structure 5003, and the entrained spray droplets are captured by the baffled water collecting structure 5003.

[0105] In the defogging packing unit, the heat exchange plate 5001 is provided with a hot channel guide bar 5005, which is protruding toward the moist hot air flow channel, and the protruding height is less than 1 / 4 of the thickness of the moist hot air flow channel, and the hot channel guide bar 5005 extends in the horizontal direction. The heat exchange plate 5001 is also provided with a cold channel guide bar 5009, which is protruding toward the dry cold air flow channel, and the protruding height is less than 1 / 4 of the thickness of the dry cold air flow channel, and the cold channel guide bar 5009 extends in the vertical direction.

[0106] The heat exchange plate may also be provided with spoiler strips 5008, and the concave and convex directions of adjacent spoiler strips 5008 are opposite.

[0107] The heat exchanger fins may also be provided with columnar supports 5004, and the columnar supports 5004 adjacent to each other on the upper and lower sides of the heat exchanger fins are raised in opposite directions. The height of the columnar supports 5004 of adjacent heat exchanger fins with opposite raised directions is 1 / 2 of the thickness of the dry cold air flow channel or the moist hot air flow channel, and the columnar supports 5004 of adjacent heat exchanger fins facing each other are bonded together to support the dry cold air flow channel and the moist hot air flow channel.

[0108] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A defogging packing unit, comprising a plurality of heat exchange fins (1001, 3001, 4001, 5001) arranged in a stack, characterized in that: The bottom edges (1013) and the opposite side edges (1016) of the adjacent heat exchange plates (1001, 3001, 4001, 5001) are alternately sealed and connected to each other to form dry cold air flow channels (1011) and wet hot air flow channels (1012) that are alternately distributed along the stacking direction and can exchange heat through the walls of the heat exchange plates (1001, 3001, 4001, 5001). The dry cold air flow channel (1011) has a pair of cold channel air inlets (1003, 3006, 4006, 5002) that are opposite to each other and are located at the positions of the side edges (1016) and the heat exchange plates (1001, 3001, 4001, 5001) are located at the positions of the side edges (1016). The heat exchange plate (1001, 3001, 4001, 5001) has a cold channel air outlet (1007, 3005, 4005, 5006) at the top edge (1014) of the heat exchange plate (1001, 3001, 4001, 5001), the humid hot air flow channel (1012) has a hot channel air inlet (1009, 5010) at the bottom edge (1013) and hot channel air outlets (1006, 3004, 4004, 5007) located at the top edge (1014) of the heat exchange plate (1001, 3001, 4001, 5001) and arranged alternately with the cold channel air outlet (1007, 3005, 4005, 5006) along the stacking direction.

2. The defogging packing unit according to claim 1, characterized in that: The bottom edge (1013) of each of the heat exchange plates (1001, 3001, 4001, 5001) extends in a horizontal direction, and the opposite side edges (1016) extend in a vertical direction, so that the cold channel air inlets (1003, 3006, 4006, 5002) of each of the dry cold air flow channels (1011) are respectively horizontally opened and horizontally opposite to each other.

3. The defogging packing unit according to claim 1, characterized in that: The top edge (1014) of each of the heat exchange plates (1001, 3001, 4001, 5001) extends in a horizontal direction or is recessed toward the bottom edge (1013). The cold channel air outlet (1007, 3005, 4005, 5006) and the hot channel air outlet (1006, 3004, 4004, 5007) respectively extend over the entire length area of ​​the top edge (1014), or the top edges (1014) of the adjacent heat exchange plates (1001, 3001, 4001, 5001) forming the dry cold air flow channel (1011) are sealed and connected at positions close to the side edges (1016), so that the cold channel air outlet (1007, 3005, 4005, 5006) extends over the middle part of the top edge (1014).

4. The defogging packing unit according to claim 1, characterized in that: A baffled water collecting structure (1002, 3009, 4009, 5003) is formed at a position of the heat exchange plate (1001, 3001, 4001, 5001) close to the hot channel air inlet (1009, 5010), and the baffled water collecting structure (1002, 3009, 4009, 5003) is configured to at least partially change the flow direction of the airflow entering from the hot channel air inlet (1009, 5010) in the humid hot airflow channel (1012), so as to capture at least part of the moisture carried in the airflow.

5. The defogging packing unit according to claim 1, characterized in that: The heat exchange plate (1001, 3001, 4001, 5001) is provided with a hot channel guide strip (5005) protruding toward the hot and humid air flow channel (1012) and extending in the vertical direction and / or a cold channel guide strip (5009) protruding toward the dry and cold air flow channel (1011) and extending in the horizontal direction. The protruding height of the hot channel guide strip (5005) and / or the cold channel guide strip (5009) is less than the thickness of the corresponding hot and humid air flow channel (1012) and the dry and cold air flow channel (1011), and preferably less than 1 / 4 of the thickness of the corresponding hot and humid air flow channel (1012) and the dry and cold air flow channel (1011).

6. The defogging packing unit according to claim 1, characterized in that: The heat exchange plate (1001, 3001, 4001, 5001) is provided with a columnar support (5004) extending in the dry cold air flow channel (1011) and / or the wet hot air flow channel (1012) and abutting against an adjacent heat exchange plate (1001, 3001, 4001, 5001).

7. A mist dissipation cooling tower, characterized in that: The demisting cooling tower comprises a tower body (2005) and a demisting packing layer (2010), a spray unit (2004) and a water sprinkling packing layer (2003) arranged from top to bottom in the tower body (2005), wherein the demisting packing layer (2010) comprises a plurality of groups of demisting packing units (2001) according to any one of claims 1 to 6, and the tower body (2005) is formed with a cooling tower air inlet (2002) located at the lower side of the water sprinkling packing layer (2003) and a plurality of cold air inlet channels (2012) respectively connected to the cold channel air inlets (1003, 3006, 4006, 5002), and the humid hot air rising from the water sprinkling packing layer (2003) can flow to the hot channel air inlet (1009, 5010) along with the cooling air introduced through the cooling tower air inlet (2002).

8. The mist dissipation cooling tower according to claim 7, characterized in that: A plurality of groups of the demisting filler units (2001) are horizontally spaced apart from each other in the tower body (2005); the cold air intake channels (2012) are respectively located in the intervals between adjacent demisting filler units (2001), and are simultaneously connected to the cold channel air inlets (1003, 3006, 4006, 5002) of adjacent demisting filler units (2001).

9. The mist dissipation cooling tower according to claim 8, characterized in that: The upper and lower sides of the cold air intake channel (2012) are respectively provided with dampers (2007) that can be switched between an open position and a closed position. When the damper (2007) is switched to the closed position, the hot and humid air raised by the water sprinkling filler layer (2003) can only flow to the top of the defogging filler layer (2010) through the hot and humid air flow channel (1012); when the damper (2007) is switched to the open position, the hot and humid air raised by the water sprinkling filler layer (2003) can simultaneously flow to the top of the defogging filler layer (2010) through the hot and humid air flow channel (1012) and the cold air intake channel (2012).

10. The mist dissipation cooling tower according to claim 9, characterized in that: A water collector (2006) is provided in the cold air intake channel (2012), and the humid hot air rising from the water sprinkling filler layer (2003) flowing through the cold air intake channel (2012) passes through the water collector (2006) and flows to the top of the demisting filler layer (2010).

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