CN112923751A - Side air-out vertical falling film type closed cooling tower - Google Patents
Side air-out vertical falling film type closed cooling tower Download PDFInfo
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- CN112923751A CN112923751A CN201911243683.2A CN201911243683A CN112923751A CN 112923751 A CN112923751 A CN 112923751A CN 201911243683 A CN201911243683 A CN 201911243683A CN 112923751 A CN112923751 A CN 112923751A
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- 238000001816 cooling Methods 0.000 title claims abstract description 104
- 239000011552 falling film Substances 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 142
- 238000005507 spraying Methods 0.000 claims abstract description 67
- 239000000945 filler Substances 0.000 claims abstract description 35
- 238000007664 blowing Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 16
- 239000010408 film Substances 0.000 abstract description 13
- 239000002826 coolant Substances 0.000 abstract description 4
- 239000007921 spray Substances 0.000 description 26
- 230000006872 improvement Effects 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
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- 238000010521 absorption reaction Methods 0.000 description 3
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- 239000000498 cooling water Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
- F28C1/14—Direct-contact trickle coolers, e.g. cooling towers comprising also a non-direct contact heat exchange
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
- F28C1/10—Arrangements for suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
- F28F25/08—Splashing boards or grids, e.g. for converting liquid sprays into liquid films; Elements or beds for increasing the area of the contact surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/10—Component parts of trickle coolers for feeding gas or vapour
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the technical field of cooling towers, in particular to a side-air-out vertical falling-film closed cooling tower, which comprises a cooling tower body, wherein the cooling tower body comprises a vertical heat exchanger, a spraying system, a fan and an air inlet grille; the spraying system is arranged above the vertical heat exchanger; the air inlet grille is arranged on one side surface of the cooling tower body, the fan is arranged on the other side surface of the cooling tower body, and the first water spraying filler is arranged between the two side surfaces. Because vertical heat exchanger is vertical setting, has reduced closed cooling tower because air and water reverse flow cause the heat exchange tube windward side to form the dry spot and the possibility of scale deposit to and realized relying on the drive of air, the flow rate of water film is accelerated, forms turbulent state on vertical serpentine coil surface easily, makes the heat transfer effect of water and vertical serpentine coil internal cooling medium better.
Description
Technical Field
The invention relates to the technical field of cooling towers, in particular to a side-air-out vertical falling-film closed cooling tower.
Background
The cooling tower is a high-efficiency cooling device, and mainly utilizes the evaporation latent heat of water to take away the heat of process fluid (usually circulating water), so as to complete the cooling of the process fluid and realize the cyclic utilization of spray water. For closed cooling towers, the process fluid flows within the coil, conducting heat out of the tube through the wall of the tube; meanwhile, spray water is sprayed outside the pipe, a water film is formed on the outer wall of the pipe, and a heat exchange process of heat transfer and mass transfer is carried out outside the pipe through spray evaporation under the action of air, so that heat transfer is realized. The closed cooling tower can ensure that the water quality is not polluted, well protects the high-efficiency operation of the main equipment and prolongs the service life.
The tubular evaporative cooling coil and the water spraying filler are used as core components of the closed cooling tower, and the performance of the tubular evaporative cooling coil and the water spraying filler directly influences the cooling effect of the closed cooling tower. And current closed cooling tower adopts horizontal coil pipe heat exchanger as indirect heating equipment mostly, and the coil pipe adopts smooth metal pipe mostly, but its heat exchange efficiency is lower relatively and material consumption is more, and the cost is higher, and these factors make its use and popularization receive the restriction to a certain extent.
In a horizontal coil closed cooling tower, spray water collides with a smooth circular pipe for heat exchange, and when the spray water flow is large, the coil is easy to vibrate and the collision noise is large; moreover, the spray water flows from top to bottom, the cooling water in the pipe flows horizontally, and the spray water and the cooling water flow in a staggered manner; in addition, because the coil pipes are mostly arranged in a regular triangle staggered mode, air flow channels are small, resistance is large, scaling is easy to occur on the windward side, and the heat exchange effect is affected.
The closed cooling tower is widely applied to circulating water systems in various industry fields, and is used as important equipment of the system, and the selection of the scheme directly influences the overall performance and energy consumption of the system. The requirements of small size, light weight, large capacity and high efficiency on the cooling tower are increasingly emphasized.
It can be seen that the closed cooling tower in the prior art has the following problems:
1. closed cooling towers among the prior art are horizontal coil pipes, mostly adopt regular triangle to pitch row mode and arrange, and the air runner is less, and the resistance is great to the easy scale deposit of windward side influences heat transfer effect.
2. When the horizontal coil is used, when the spraying water flow is large, the coil is easy to vibrate, and the collision noise is large.
3. The air flow flux in the closed cooling tower is small and the performance of the heat exchange is poor.
Disclosure of Invention
The invention aims to: in order to solve the problems in the prior art, the invention provides a side-air-out vertical falling-film closed cooling tower.
In order to solve the problems in the prior art, the invention adopts the following technical scheme:
a side air-out vertical falling film type closed cooling tower comprises a cooling tower body, wherein the cooling tower body comprises a vertical heat exchanger, a spraying system, a fan and an air inlet grille; the spraying system is arranged above the vertical heat exchanger; the air inlet grille is arranged on one side surface of the cooling tower body, the fan is arranged on the other side surface of the cooling tower body, and a first water spraying filler is arranged between the two side surfaces; the vertical heat exchanger comprises an inlet collecting pipe and an outlet collecting pipe which are vertically arranged, a plurality of vertical serpentine coils are arranged between the inlet collecting pipe and the outlet collecting pipe, and the inlet and the outlet of each vertical serpentine coil are respectively connected with the inlet collecting pipe and the outlet collecting pipe.
As an improvement of the technical scheme of the side-air-out vertical falling-film closed cooling tower, each vertical serpentine coil is formed by a plurality of twisted tubes in a disc shape, and a plurality of contact points exist between two adjacent twisted tubes when the center distance between the two adjacent twisted tubes is equal to the distance between the long axes of the two adjacent twisted tubes.
As an improvement of the technical solution of the side-air-out vertical falling-film closed cooling tower of the present invention, the vertical heat exchanger includes a first inlet header and a second inlet header, the first inlet header and the second inlet header are disposed on the upper portion of the vertical heat exchanger, the outlet header is disposed on the lower portion of the vertical heat exchanger, a first vertical serpentine coil is disposed between the first inlet header and the outlet header, a second vertical serpentine coil is disposed between the second inlet header and the outlet header, the first vertical serpentine coil and the second vertical serpentine coil are symmetrically disposed, and outlets of the first vertical serpentine coil and the second vertical serpentine coil are both connected to an upper end of the outlet header.
As an improvement of the technical scheme of the side-air-out vertical falling-film closed cooling tower, a space exists between every two adjacent vertical serpentine coils, and the space is 5-100 mm.
As an improvement of the technical scheme of the side-air-out vertical falling-film closed cooling tower, the air inlet grille is arranged on a first side surface of the cooling tower body, the fan is arranged on a second side surface of the cooling tower body, and the first side surface and the second side surface are two opposite surfaces.
As an improvement of the technical scheme of the side-air-out vertical falling-film closed cooling tower, the first water-spraying filler is arranged below the vertical heat exchanger, and the first water-spraying filler is arranged at a position close to the first side surface of the cooling tower main body.
As an improvement of the technical scheme of the side-air-out vertical falling-film closed cooling tower, the cooling tower main body further comprises a water-retaining filler, and the water-retaining filler is arranged beside the first water-spraying filler and close to the second side surface of the cooling tower main body.
As an improvement of the technical scheme of the side-air-out vertical falling-film closed cooling tower, the spraying system further comprises a spraying device and a water pump; the cooling tower body also comprises a water collecting tray arranged at the bottom of the cooling tower body, and the water collecting tray is sequentially connected with the water pump and the spraying device through a water pipe.
As an improvement of the technical scheme of the side-air-out vertical falling film type closed cooling tower, the spray device comprises a connecting plate and a plurality of spray headers arranged on the connecting plate, the connecting plate is respectively connected with the water pipe and the plurality of spray headers, and the width of the connecting plate is the same as that of the vertical heat exchanger.
The invention has the beneficial effects that:
1. according to the invention, because the vertical heat exchanger is arranged vertically, the possibility of scaling of the closed cooling tower due to dry spots formed on the windward side of the heat exchange tube caused by the reverse flow of air and water is reduced, the driving by air is realized, the flow speed of a water film is accelerated, and a turbulent state is easily formed on the surface of the vertical serpentine coil, so that the heat exchange effect of water and a cooling medium in the vertical serpentine coil is better.
2. Through the setting of fan, air-inlet grille and trickle filler, water carries out the heat exchange with the air that air-inlet grille got into on first trickle filler surface, and partial heat absorption evaporation of water is taken away by the air, and remaining trickle temperature reduces, realizes heat exchange and refrigerated effect.
3. Because vertical serpentine coil is formed by many distortion coils discoids, adjacent distortion pipe supports each other, has solved the existence among the prior art when spraying discharge is great, and the coil pipe shakes easily to the great problem of collision noise.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a schematic structural view of a vertical heat exchanger according to the present invention;
fig. 5 is a left side view of fig. 4.
Description of reference numerals: 1-cooling tower body; 2-vertical heat exchanger; 3, a fan; 4-an air inlet grille; 5-a first side; 6-a second side; 7-first water-spraying filler; 8-water retaining filler; 9-air inlet; 10-a water pump; 11-a water collection tray; 12-a water pipe; 13-a connecting plate; 14-a shower head; 15-an inlet header; 16-an outlet header; 17-vertical serpentine coil; 18-a first inlet header; 19-a second inlet header; 20-a first vertical serpentine coil; 21-a second vertical serpentine coil; 22-air inlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of embodiments of the present invention, and not all embodiments.
As shown in fig. 1 to 5, a side-air-out vertical falling-film closed cooling tower comprises a cooling tower body 1, wherein the cooling tower body 1 comprises a vertical heat exchanger 2, a spraying system, a fan 3 and an air inlet grille 4; the spraying system is arranged above the vertical heat exchanger 2, the air inlet grille 4 is arranged on one side surface of the cooling tower body 1, the fan 3 is arranged on the other side surface of the cooling tower body 1, and a first water spraying filler 7 is arranged between the two side surfaces. Preferably, the fan 3 can adopt an axial flow fan 3 or a centrifugal fan 3, and the air outlet faces outwards to ensure the stable flow of the air flow.
An air inlet 9 is arranged above the spraying system, and air can enter the cooling tower main body from the air inlet 9 and the air inlet grille 4. When the vertical heat exchanger is used, the vertical heat exchanger 2 is sprayed by the spraying system, water is sprayed on the outer surface of the vertical heat exchanger 2, the vertical heat exchanger 2 is vertically arranged, the water flows down on the vertical heat exchanger 2 from top to bottom, the flowing water forms a water film on the outer surface of the vertical heat exchanger 2, and when the direction of the water film is consistent with the flowing direction of air, the possibility of scaling caused by dry spots formed on the windward surface of the heat exchange tube due to the reverse direction of wind and water is reduced due to the same-direction flowing.
And because the first water spraying filler 7 is arranged between the air inlet grille 4 and the fan 3, after water is sprayed by the spraying system, the water exchanges heat with the air entering the air inlet grille 4 on the surface of the first water spraying filler 7, partial heat absorption and evaporation of water are carried away by the air, the temperature of the rest water spraying is reduced, and the heat exchange and cooling effects are realized.
In the invention, the air inlet grille 4 and the fan 3 are respectively arranged on the two side surfaces of the cooling tower body 1, and the air flowing speed in the cooling tower body 1 is accelerated through the air inlet grille 4 and the fan 3, thereby solving the problems of small air flow flux and poor heat exchange performance in a closed cooling tower in the prior art. Simultaneously, because vertical heat exchanger 2 is vertical setting, when using, the water film from the top down is formed to heat exchanger shower to the spray system on the surface of heat exchanger, has solved the closed cooling tower that exists among the prior art and has been horizontal coil pipe, adopts regular triangle fork row mode to arrange mostly, and the air runner is less, and the resistance is great to the easy scale deposit of windward side influences the problem of heat transfer effect. Preferably, the fan 3 is arranged on the outer surface of the other side surface of the cooling tower body 1, namely the fan 3 is arranged outside the cooling tower body 1, and the air outlet faces outwards, so that the fan 3 is prevented from being sprayed to water in the cooling tower, and the service life of the fan 3 is ensured. Besides the functions of ventilating and accelerating the air flowing speed, the air inlet grille 4 can also avoid the sunshine from directly irradiating the first water spraying filler 7 and the water spraying in the water collecting tank, so as to prevent the algae from breeding.
The vertical heat exchanger 2 comprises an inlet header 15 and an outlet header 16 which are vertically arranged, a plurality of vertical serpentine coils 17 are arranged between the inlet header 15 and the outlet header 16, and the inlet and the outlet of each vertical serpentine coil 17 are respectively connected with the inlet header 15 and the outlet header 16. Because a plurality of vertical serpentine coils 17 which are parallel to each other are vertically arranged between the inlet header 15 and the outlet header 16, and because the spraying system is arranged above the vertical heat exchanger 2, when the spraying system sprays water to the vertical heat exchanger 2, the water flows along the outer surface of the vertical heat exchanger 2 from top to bottom, and a water film is formed on the outer surface of the vertical heat exchanger 2. When the direction of the water film is consistent with the direction of the air flow, the co-current flow reduces the possibility of scaling because the dry spots are formed on the windward side of the heat exchange tube by the wind and water in the reverse direction. Still because the water film is unanimous with the air flow direction, rely on the drive of air, the flow speed of water film is accelerated, form turbulent state easily at 2 external surfaces of vertical heat exchanger, therefore the spray water is thinner at the boundary layer on heat exchange tube surface, make spray water and intraductal cooling medium's heat transfer effect preferred, can practice thrift the spray water use amount, consequently spraying system's power can reduce, make closed cooling tower whole economy, the heat transfer effect is better, save 2 volumes of vertical heat exchanger, weight and consumptive material. Meanwhile, due to the fact that the plurality of vertical serpentine coils 17 are vertically arranged, the problems that in the prior art, due to the fact that most of the coils are arranged in a regular-triangle staggered mode, air flow channels are small, resistance is large, scaling is prone to occurring on the windward side, and the heat exchange effect is affected are solved.
Each vertical serpentine coil 17 is formed by a plurality of twisted tubes in a disc shape, and a plurality of contact points exist between two adjacent twisted tubes when the center distance between the two adjacent twisted tubes is equal to the distance between the long axes outside the twisted tubes. Because the cross section of the twisted tubes is oval, when the center distance between the adjacent twisted tubes is equal to the outer long axis of the twisted tubes, a plurality of contact points exist between the adjacent twisted tubes, and the contact points play a role of mutual support, so that the vibration of the heat exchange tube caused by the fact that the sprayed water and the high-speed airflow pass over can be effectively prevented, and the flow rate of the air outside the tube can be improved. Preferably, a distance exists between two adjacent vertical serpentine coils 17, the distance ranges from 5 mm to 100mm, vibration between the adjacent twisted pipes can be avoided more effectively, and when the distance between the two adjacent vertical serpentine coils 17 ranges from 5 mm to 100mm, the wind speed is within a normal range, and the air resistance is the minimum. More preferably, because a plurality of vertical serpentine coil 17 parallel arrangement, can rationally set up vertical serpentine coil 17's quantity according to cooling tower body 1's size, design according to air flow rate, when above-mentioned distance is great, can insert a small amount of filler between the two, prevent during the direct drip water collector of shower water, can also increase the area of contact of shower water and air simultaneously, its temperature is effectively cooled off, when having solved the use horizontal coil who exists among the prior art, when spraying water flow great, the coil shakes easily, and the great problem of collision noise. The inlet header 15, outlet header 16 and vertical serpentine 17 may be made of stainless steel, copper, carbon steel, or the like.
As an embodiment of the invention, the vertical heat exchanger 2 comprises a first inlet header 18 and a second inlet header 19, the first inlet header 18 and the second inlet header 19 are arranged at the upper part of the vertical heat exchanger 2, the outlet header 16 is arranged at the lower part of the vertical heat exchanger 2, a first vertical serpentine coil 20 is arranged between the first inlet header 18 and the outlet header 16, a second vertical serpentine coil 21 is arranged between the second inlet header 19 and the outlet header 16, the first vertical serpentine coil 20 and the second vertical serpentine coil 21 are symmetrically arranged, and the outlets of the first vertical serpentine coil 20 and the second vertical serpentine coil 21 are connected with the upper end of the outlet header 16. The outlets of the first vertical serpentine 20 and the second vertical serpentine 21 are all located at the highest point of the outlet header 16, making the heat exchanger smaller in width.
Because one side of first vertical serpentine coil 20 and one side of vertical serpentine coil 21 of second contact, the second trickle filler has been placed to the opposite side of first vertical serpentine coil 20 and the opposite side of vertical serpentine coil 21 of second, can increase the contact surface area of water and air, extension contact time improves the efficiency of cooling tower. And the first inlet header 18 and the second inlet header 19 are arranged at the upper part of the vertical heat exchanger 2, and the outlet header 16 is arranged at the lower part of the vertical heat exchanger 2, so that the process medium in the vertical serpentine coil 17 flows in a mode of bottom-in and top-out.
As an embodiment of the invention, the air inlet grille 4 is arranged on a first side surface 5 of the cooling tower body 1, the fan 3 is arranged on a second side surface 6 of the cooling tower body 1, and the first side surface 5 and the second side surface 6 are opposite. Thus, the air inlet grille 4 and the fan 3 are arranged on the same straight line in the cooling tower, and the air flowing speed can be further increased.
The first water-spraying packing 7 is arranged below the vertical heat exchanger 2, and the first water-spraying packing 7 is arranged close to the first side surface 5 of the cooling tower main body. When the cooling tower is used, the spraying system is arranged above the vertical heat exchanger 2 to spray water to the vertical heat exchanger 2, the water falls downwards under the action of gravity, at the moment, the water flowing through the outer surface of the vertical heat exchanger 2 flows into the first water spraying filler 7, the contact surface area of the water and the air can be increased through the first water spraying filler 7, the contact time is prolonged, the water is further cooled by the spray water which is heated by heat exchange with fluid in the coil pipe, and the efficiency of the cooling tower is improved. Meanwhile, because the first water spraying packing 7 is arranged at a position close to the first side face 5, when air enters the cooling tower main body from the air inlet grille 4, the air can firstly pass through the first water spraying packing 7, so that the cooling effect is more obvious.
The cooling tower main body further comprises a water retaining filler 8, the water retaining filler 8 is arranged beside the first water spraying filler 7 and is close to the second side surface 6 of the cooling tower main body, water can be prevented from splashing through the water retaining filler 8, and water corrosion of parts in the cooling tower main body is avoided. Preferably, the water retaining filler 8 extends upwards to the side of the vertical heat exchanger 2, so that the water splashing during spraying can be effectively avoided. Preferably, the water retaining filler 8 and the first water spraying filler 7 are both made of PVC materials.
The spraying system also comprises a spraying device and a water pump 10, the cooling tower main body also comprises a water collecting tray 11 arranged at the bottom of the cooling tower main body, and the water collecting tray 11 is sequentially connected with the water pump 10 and the spraying device through a water pipe 12. In detail, the spray device sprays water to the vertical heat exchanger 2, the water flows from top to bottom along the vertical heat exchanger 2, then passes through the first water spraying filler 7 and falls into the water collecting tray 11, the water collecting tray 11 conveys the water to the spray device through the water pump 10 under the action of the water pump 10, and the water is sprayed for the vertical heat exchanger 2 again. More specifically, the spraying device, the water collecting tray 11, the water pump 10 and the water pipe 12 form a water circulation, which not only can reuse sprayed water, but also can reduce the temperature of water in advance when the water flows along with the water pipe 12, thereby realizing the effects of energy saving and water saving.
Further, the spraying device comprises a connecting plate 13 and a plurality of spraying heads 14 arranged on the connecting plate 13, the connecting plate 13 is respectively connected with the water pipe 12 and the plurality of spraying heads 14, and the width of the connecting plate 13 is the same as that of the vertical heat exchanger 2. Because the connecting plate 13 is respectively connected with the water pipe 12 and the plurality of spray headers 14, when the spray device sprays water to the vertical heat exchanger 2, the water flows through the connecting plate 13 from the water pipe 12 to reach the plurality of spray headers 14, and is sprayed to the vertical heat exchanger 2 through the spray headers 14. The width of the rain connecting plate 13 is the same as that of the vertical heat exchanger 2, so that the spraying area is maximized, the outer surface of the vertical heat exchanger 2 can be completely wet, and when spraying, water forms a descending water film along the vertical heat exchanger 2 from top to bottom, so that the spraying and cooling effects are ensured.
When the water-saving type heat exchanger is used, water in the water collecting tray 11 flows through the spraying device under the driving of the water pump 10, is uniformly sprayed on the outer surface of the vertical heat exchanger 2, absorbs the heat of the water in the vertical serpentine coil 17 to raise the temperature, the water flowing out of the vertical heat exchanger 2 is subjected to heat and mass exchange with air entering the air inlet grille 4 on the surface of the water spraying filler, part of the water is subjected to heat absorption and evaporation to be taken away by the air, the temperature of the rest spraying water is reduced, and finally the spraying water returns to the water collecting tray 11 to complete a cycle, and liquid drops carried in the air are blocked by the water blocking filler 8 to be collected into the.
In the invention, because the flowing directions of water and air are consistent, the water film can be well covered on the outer surface of the vertical heat exchanger 2, and the surface of the heat exchange tube is ensured to be completely wet. And reduced closed cooling tower through vertical heat exchanger 2 because air and water reverse flow cause the heat exchange tube windward side to form the dry spot and the possibility of scale deposit, and realized the drive that relies on the air, the flow speed of water film is accelerated, form the torrent state on vertical serpentine coil 17 surface easily, make water better with the heat transfer effect of vertical serpentine coil 17 internal cooling medium, the use amount that can also practice thrift water, spray system's power can reduce then, make closed cooling tower whole economy, the heat transfer effect is better, save the heat exchanger volume, weight and consumptive material.
All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Claims (9)
1. A side air-out vertical falling film type closed cooling tower comprises a cooling tower body, and is characterized in that the cooling tower body comprises a vertical heat exchanger, a spraying system, a fan and an air inlet grille;
the spraying system is arranged above the vertical heat exchanger; the air inlet grille is arranged on one side surface of the cooling tower body, the fan is arranged on the other side surface of the cooling tower body, and a first water spraying filler is arranged between the two side surfaces;
the vertical heat exchanger comprises an inlet collecting pipe and an outlet collecting pipe which are vertically arranged, a plurality of vertical serpentine coils are arranged between the inlet collecting pipe and the outlet collecting pipe, and the inlet and the outlet of each vertical serpentine coil are respectively connected with the inlet collecting pipe and the outlet collecting pipe.
2. The side-exit vertical falling film closed cooling tower according to claim 1, wherein each vertical serpentine coil is formed by a plurality of twisted tubes in a disc shape, and a plurality of contact points exist between two adjacent twisted tubes when the center distance between the two adjacent twisted tubes is equal to the distance between the long axes of the two adjacent twisted tubes.
3. The side-out vertical falling film closed cooling tower according to claim 1 or 2, wherein the vertical heat exchanger comprises a first inlet header and a second inlet header, the first inlet header and the second inlet header are disposed at an upper portion of the vertical heat exchanger, the outlet header is disposed at a lower portion of the vertical heat exchanger, a first vertical serpentine coil is disposed between the first inlet header and the outlet header, a second vertical serpentine coil is disposed between the second inlet header and the outlet header, the first vertical serpentine coil and the second vertical serpentine coil are symmetrically disposed, and outlets of the first vertical serpentine coil and the second vertical serpentine coil are connected to an upper end of the outlet header.
4. The side-blowing vertical falling film closed cooling tower according to claim 1 or 2, wherein a spacing exists between adjacent vertical serpentine coils, and the spacing is 5-100 mm.
5. The side-out vertical falling film closed cooling tower of claim 1, wherein the air inlet grille is disposed on a first side surface of the cooling tower body, the fan is disposed on a second side surface of the cooling tower body, and the first side surface and the second side surface are opposite.
6. The side-out vertical falling film closed cooling tower according to claim 5, wherein the first trickle charge is disposed below the vertical heat exchanger and proximate to the first side of the cooling tower body.
7. The side-out vertical falling film closed cooling tower according to claim 6, wherein the cooling tower body further comprises a water-retaining filler, and the water-retaining filler is disposed beside the first water-spraying filler and near the second side surface of the cooling tower body.
8. The side-out vertical falling film closed cooling tower according to claim 1, wherein the spraying system further comprises a spraying device and a water pump; the cooling tower body also comprises a water collecting tray arranged at the bottom of the cooling tower body, and the water collecting tray is sequentially connected with the water pump and the spraying device through a water pipe.
9. The side-out vertical falling film closed cooling tower according to claim 8, wherein the spraying device comprises a connecting plate and a plurality of spraying heads arranged on the connecting plate, the connecting plate is respectively connected with the water pipe and the plurality of spraying heads, and the width of the connecting plate is the same as that of the vertical heat exchanger.
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| CN201911243683.2A CN112923751A (en) | 2019-12-06 | 2019-12-06 | Side air-out vertical falling film type closed cooling tower |
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| CN201911243683.2A CN112923751A (en) | 2019-12-06 | 2019-12-06 | Side air-out vertical falling film type closed cooling tower |
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