CN112923753A - Closed cooling tower - Google Patents

Closed cooling tower Download PDF

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Publication number
CN112923753A
CN112923753A CN201911243767.6A CN201911243767A CN112923753A CN 112923753 A CN112923753 A CN 112923753A CN 201911243767 A CN201911243767 A CN 201911243767A CN 112923753 A CN112923753 A CN 112923753A
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CN
China
Prior art keywords
water
cooling tower
heat exchanger
inlet
disposed
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Pending
Application number
CN201911243767.6A
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Chinese (zh)
Inventor
朱冬生
陈二雄
刘世杰
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Guangzhou Institute of Energy Conversion of CAS
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Guangzhou Institute of Energy Conversion of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Guangzhou Institute of Energy Conversion of CAS filed Critical Guangzhou Institute of Energy Conversion of CAS
Priority to CN201911243767.6A priority Critical patent/CN112923753A/en
Publication of CN112923753A publication Critical patent/CN112923753A/en
Pending legal-status Critical Current

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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
    • 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 closed cooling tower, which comprises a cooling tower main body, wherein a heat exchanger and a spraying system are arranged in the cooling tower main body, the spraying system is used for spraying water to the heat exchanger, the spraying system comprises a spraying device, and the spraying device is arranged above the heat exchanger; the heat exchanger comprises an inlet collecting pipe and an outlet collecting pipe which are vertically arranged, a plurality of vertical serpentine coils are vertically arranged between the inlet collecting pipe and the outlet collecting pipe, and an inlet and an outlet of each vertical serpentine coil are respectively connected with the inlet collecting pipe and the outlet collecting pipe. When spraying, the direction of shower water is unanimous with vertical serpentine coil's direction, reduces because the wind-water is reverse to form the possibility of dry spot and scale deposit at the heat exchange tube windward side to and realize relying on circulating air's drive, the flow rate of water film accelerates, forms turbulent state easily on the heat exchange tube surface, makes shower water and intraductal coolant's heat transfer effect preferred.

Description

Closed cooling tower
Technical Field
The invention relates to the technical field of cooling towers, in particular to a 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 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. The effect of the water spraying filler in the cooling tower is that the contact surface area of water and air is increased, the contact time is prolonged, the water spraying filler can further cool the water spraying filler which is heated by exchanging heat with the fluid in the coil pipe, and the efficiency of the cooling tower is improved. The existing cooling tower mostly adopts a horizontal coil type heat exchanger as heat exchange equipment, the coil mostly adopts a smooth metal round pipe, but the heat exchange efficiency is relatively low, the material consumption is more, the manufacturing cost is higher, and the factors limit the use and the popularization to a certain extent.
In the existing horizontal coil 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 has large collision noise; 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.
It can be seen that the cooling tower in the prior art has the following disadvantages:
1. most of the existing coil pipes are arranged in a regular triangle staggered manner, air flow channels are small, resistance is large, scaling is easy to occur on the windward side, spray water flows from top to bottom, cooling water in the pipes flows horizontally, and the spray water and the cooling water flow in the pipes in a staggered manner, so that the heat exchange effect is influenced.
2. The existing coil pipe is generally a smooth round pipe, and when the spraying water flow is large, the coil pipe is easy to vibrate and has large collision noise.
Disclosure of Invention
The invention aims to: in order to solve the problems in the prior art, the invention provides a closed cooling tower.
In order to solve the problems in the prior art, the invention adopts the following technical scheme:
a closed cooling tower comprises a cooling tower main body, wherein a heat exchanger and a spraying system are arranged in the cooling tower main body, the spraying system is used for spraying water to the heat exchanger, the spraying system comprises a spraying device, and the spraying device is arranged above the heat exchanger; the heat exchanger comprises an inlet collecting pipe and an outlet collecting pipe which are vertically arranged, a plurality of vertical serpentine coils are vertically arranged between the inlet collecting pipe and the outlet collecting pipe, and an inlet and an 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 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 outside the twisted tubes.
As an improvement of the technical solution of the closed cooling tower of the present invention, the heat exchanger includes a first inlet header, a second inlet header, and an outlet header, the first inlet header and the second inlet header are disposed at a lower portion of the heat exchanger, the outlet header is disposed at an upper portion of the 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, and the first vertical serpentine coil and the second vertical serpentine coil are symmetrically disposed and connected to left and right sides of the outlet header, respectively.
As an improvement of the technical solution of the closed cooling tower of the present invention, the heat exchanger includes a third inlet header, a fourth inlet header and an outlet header, the outlet header is disposed at a lower portion of the heat exchanger, the third inlet header and the fourth inlet header are disposed at an upper portion of the heat exchanger, a third vertical serpentine coil is disposed between the third inlet header and the outlet header, the fourth inlet header and the outlet header support are disposed with a fourth vertical serpentine coil, and the third vertical serpentine coil and the fourth vertical serpentine coil are symmetrically disposed and connected to left and right sides of the outlet header respectively.
As an improvement of the closed cooling tower according to the present invention, the outlets of the third inlet header and the fourth inlet header are connected to the upper end of the outlet header.
As an improvement of the technical scheme of the closed cooling tower, the spray system further comprises a water collecting tray arranged at the bottom of the cooling tower main body and water pipes respectively connected with the water collecting tray and the spray device, and a water pump is further connected between the spray device and the water collecting tray.
As an improvement of the technical scheme of the closed cooling tower, the cooling tower main body is divided into an upper layer and a lower layer, a water-leaking partition plate is arranged between the upper layer and the lower layer, the heat exchanger is arranged on the upper surface of the partition plate, and a fourth water-spraying filler is arranged between the lower surface of the partition plate and the water collecting tray.
As an improvement of the technical scheme of the closed cooling tower, a lower water-retaining filler is arranged below the partition plate, the lower water-retaining filler is arranged on one side of the fourth water spraying filler, and the lower water-retaining filler is arranged below the partition plate.
As an improvement of the technical scheme of the closed cooling tower, the cooling tower main body further comprises an upper-layer water retaining filler, the upper-layer water retaining filler is arranged on the partition plate, and the water retaining filler is arranged on one side of the heat exchanger.
As an improvement of the technical scheme of the closed cooling tower, the cooling tower main body comprises an air inlet and an air outlet, and the air inlet is arranged on the side surface of the cooling tower main body and above the spraying device; the cooling tower main body also comprises a fan, and the fan is arranged at the upper part of the cooling tower main body and is arranged at the air outlet.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, because the inlet header and the outlet header are vertically arranged, and a plurality of vertical serpentine coils are vertically arranged between the inlet header and the outlet header, when in spraying, the direction of spray water is consistent with that of the vertical serpentine coils, the possibility of scaling caused by dry spots formed on the windward side of the heat exchange tube by wind and water in the reverse direction is reduced, and the driving of circulating air is realized, the flow speed of a water film is accelerated, a turbulent state is easily formed on the surface of the heat exchange tube, so that the heat exchange effect of the spray water and a cooling medium in the tube is better, and the problems that in the prior art, because most of the coils are arranged in a regular triangle staggered mode, an air flow channel is smaller, the resistance is larger, the windward side is easy to scale and the heat exchange effect is influenced are solved.
2. Because vertical serpentine coil comprises many twist tubes disklings, when the centre-to-centre spacing between the adjacent twist tube is equal mutually rather than the outer major axis of pipe, can have a plurality of contact point between the adjacent twist tube, play the effect of mutual support through these contact points, can effectively prevent the heat exchange tube because the vibration that produces is skipped over to spray water and high velocity air to can improve the velocity of flow of outside of tubes air.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of the heat exchanger of FIG. 1;
FIG. 3 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 4 is a schematic diagram of the heat exchanger of FIG. 1;
FIG. 5 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 6 is a schematic diagram of the heat exchanger of FIG. 1;
FIG. 7 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 8 is a schematic structural view of the heat exchanger of FIG. 1;
fig. 9 is a schematic view of a prior art heat exchanger provided with coils.
Description of reference numerals: 1-a cooling tower body; 2-a heat exchanger; 3-a spraying device; 4-an inlet header; 5-an outlet header; 6-vertical serpentine coil pipe; 7-a first inlet header; 8-a second inlet header; 9-a first vertical serpentine coil; 10-a second vertical serpentine coil; 11-a third inlet header; 12-a fourth inlet header; 13-a third vertical serpentine coil; 14-a fourth vertical serpentine coil; 15-first water-drenching filler; 16-second water-drenching filler; 17-third water-drenching filler; 18-fourth water-drenching filler; 19-a water collection tray; 20-a water pipe; 21-a water pump; 22-a separator; 23-upper layer; 24-lower layer; 25-upper water-retaining filler; 26-lower layer water-retaining filler; 27-a fan.
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, the closed cooling tower comprises a cooling tower main body 1, wherein a heat exchanger 2 and a spraying system are arranged in the cooling tower main body 1, and the spraying system is used for spraying water to the heat exchanger 2. The spraying system comprises a spraying device 3, and the spraying device 3 is arranged above the heat exchanger 2.
The heat exchanger 2 comprises an inlet collecting pipe 4 and an outlet collecting pipe 5 which are vertically arranged, a plurality of vertical serpentine coils 6 are vertically arranged between the inlet collecting pipe 4 and the outlet collecting pipe 5, and the inlet and the outlet of each vertical serpentine coil 6 are respectively connected with the inlet collecting pipe 4 and the outlet collecting pipe 5.
Because a plurality of vertical serpentine coils 6 which are parallel to each other are vertically arranged between the inlet header 4 and the outlet header 5, and because the spraying system is arranged above the heat exchanger 2, when the spraying system sprays water to the heat exchanger 2, the water flows along the outer surface of the heat exchanger 2 from top to bottom, and a water film is formed on the outer surface of the 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 circulating air flow direction, rely on circulating air's drive, the flow rate of water film is accelerated, form turbulent state easily at 2 surfaces of 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 spray water pump 21 power can reduce, make closed cooling tower overall economy, the heat transfer effect is better, save 2 volumes of heat exchanger, weight and consumptive material. Meanwhile, the vertical arrangement of the vertical serpentine coils 6 solves the problems that in the prior art, the coils 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 structure of the spraying device 3 is the conventional structure, so the detailed description is omitted.
In the invention, the cooling tower body 1 comprises an air inlet and an air outlet, the air inlet is arranged on the side surface of the cooling tower body 1 and above the spraying device 3, the air outlet is arranged beside the air inlet, when air enters the cooling tower body 1 from the air inlet, the air flows along the direction of the heat exchanger 2 and then flows to the air outlet to be discharged, and primary air circulation is completed. Preferably, the cooling tower body 1 further comprises a fan 27, the fan 27 is disposed on the upper portion of the cooling tower body 1 and disposed at the air outlet, and the flow speed of air in the closed cooling tower can be increased by the fan 27.
Each vertical serpentine coil 6 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 6, the distance range is 5-100mm, vibration between the adjacent twisted tubes can be effectively avoided, and when the distance between two adjacent vertical serpentine coils 6 is 5-100mm, the wind speed is within a normal range, and the air resistance is the minimum. More preferred, because 6 parallel arrangement of a plurality of vertical serpentine coil, can rationally set up vertical serpentine coil 6's quantity according to the size of closed cooling tower, design according to air flow rate, when above-mentioned distance is great, can insert a small amount of fillers between the two, prevent during the direct drip water collector of shower water, can also increase the area of contact of shower water and circulating air simultaneously, effectively cool off its temperature.
As a first embodiment of the present invention, as shown in fig. 1 and fig. 2, a heat exchanger 2 includes an inlet header 4 and an outlet header 5, the inlet header 4 is disposed on the upper portion of the heat exchanger 2, the outlet header 5 is disposed on the lower portion of the heat exchanger 2, a plurality of vertical serpentine coils 6 are vertically disposed between the inlet header 4 and the outlet header 5 in parallel, the plurality of vertical serpentine coils 6 are vertically disposed between the inlet header 4 and the outlet header 5 in parallel, that is, the plurality of vertical serpentine coils 6 are in accordance with the flowing direction of the spray water, which not only solves the problems of the prior art that the coils are mostly disposed in a regular triangle staggered manner, the air flow channel is small, the resistance is large, and the windward side is easy to scale, which affects the heat exchange effect, but also accelerates the flow speed of the spray water by the air flow, rely on the drive of air for the flow velocity of water film, the flow velocity of water film is very fast, forms the torrent state on the surface of heat exchanger 2 easily, therefore the shower water is thinner at the boundary layer on heat exchange tube surface for shower water and intraductal cooling medium's heat transfer effect preferred, can practice thrift the shower water use amount, therefore spray water pump 21 power can reduce, makes the whole economy of closed cooling tower, heat transfer effect better.
As a second embodiment of the present invention, as shown in FIGS. 3 and 4, a heat exchanger 2 includes a first inlet header 7, a second inlet header 8, and an outlet header 5, the first inlet header 7 and the second inlet header 8 are disposed at a lower portion of the heat exchanger 2, the outlet header 5 is disposed at an upper portion of the heat exchanger 2, a first vertical serpentine coil 9 is disposed between the first inlet header 7 and the outlet header 5, a second vertical serpentine coil 10 is disposed between the second inlet header 8 and the outlet header 5, the first vertical serpentine coil 9 and the second vertical serpentine coil 10 are symmetrically disposed and connected to left and right sides of the outlet header 5, the two-inlet vertical type serpentine coil pipe 6 can be suitable for occasions with large process fluid flow, and the inlets of the two vertical type serpentine coil pipes 6 are respectively connected with the two inlet headers 4, so that the flow velocity of the process fluid of the single vertical type serpentine coil pipe 6 can be reduced, and the friction resistance can be reduced. Meanwhile, the first vertical type serpentine coil 9 and the second vertical type serpentine coil 10 are arranged in a bilateral symmetry mode, so that the length of the whole heat exchanger 2 is reduced, the external dimension of the closed cooling tower is reduced, and the occupied area is reduced. There is the interval between first vertical serpentine coil 9 and the vertical serpentine coil 10 of second, has placed first trickle in the interval and has packed 15, can increase the contact surface area of water and air, extension contact time, will with first vertical serpentine coil 9 and the vertical serpentine coil 10 interior process fluid heat transfer and the shower water further cooling that heaies up of second, improve the efficiency of cooling tower.
As a third embodiment of the present invention, as shown in fig. 5 and 6, the heat exchanger 2 includes a third inlet header 11, a fourth inlet header 12 and an outlet header 5, the outlet header 5 is disposed at a lower portion of the heat exchanger 2, the third inlet header 11 and the fourth inlet header 12 are disposed at an upper portion of the heat exchanger 2, a third vertical serpentine coil 13 is disposed between the third inlet header 11 and the outlet header 5, the fourth inlet header 12 and the outlet header 5 are supported by a fourth vertical serpentine coil 14, and the third vertical serpentine coil 13 and the fourth vertical serpentine coil 14 are symmetrically disposed and connected to left and right sides of the outlet header 5, respectively. Compared with the second embodiment, the difference of the embodiment is that the inlet and outlet directions of the heat exchanger 2 for the closed cooling tower are opposite, a certain gap is formed between the left and right vertical serpentine coils 6, the size of the gap is adjustable, and the contact area between spray water and circulating air can be increased by arranging the filler in the gap, so that the temperature of the spray water and the circulating air can be effectively cooled. There is the interval between third vertical serpentine coil 13 and the fourth vertical serpentine coil 14, has placed second trickle in the interval and has packed 16, can increase the contact surface area of water and air, extension contact time, will with the interior process fluid heat transfer of third vertical serpentine coil 13 and the fourth vertical serpentine coil 14 and the shower water further cooling that heaies up, improve the efficiency of cooling tower. Meanwhile, the spray water is not blocked by the outlet header 5 and is directly sprayed in the spray water filler, so that the contact area of the spray water and the circulating air can be increased, and the temperature of the spray water can be effectively cooled.
As a fourth embodiment of the present invention, as shown in FIGS. 7 and 8, the outlets of the third vertical serpentine coil 13 and the fourth vertical serpentine coil 14 are connected to the upper end of the outlet header 5. In the third embodiment described above, the third vertical serpentine 13 and the fourth vertical serpentine 14 are adjacent to each other, and the third vertical serpentine 13 and the fourth vertical serpentine are connected to the upper end of the outlet header 5. In detail, one side of the third vertical serpentine 13 is in contact with one side of the fourth vertical serpentine 14, and the outlet of the third vertical serpentine 13 and the outlet of the fourth vertical serpentine 14 are both connected to the upper end of the outlet header 5. Compared with the third embodiment, the difference is that the outlets of the left and right vertical serpentine coils 6 are all positioned at the highest position of the outlet header 53, and the gap existing in the third embodiment is not used, so that the width of the heat exchanger 2 is smaller. Because one side of the vertical serpentine coil 13 of third contacts with one side of the vertical serpentine coil 14 of fourth, the third trickle filler 17 has been placed to the opposite side of the vertical serpentine coil 13 of third and the opposite side of the vertical serpentine coil 14 of fourth, can increase the contact surface area of water and air, extension contact time, improve the efficiency of cooling tower.
The spraying system also comprises a water collecting tray 19, a water pipe 20 and a water pump 21. The water collecting tray 19 is arranged at the bottom of the cooling tower main body 1, the water pipe 20 is respectively connected with the water collecting tray 19 and the spraying device 3, and a water pump 21 is also connected between the spraying device 3 and the water collecting tray 19. When the heat exchanger is used, water is sprayed to the heat exchanger 2 through the water spraying device, the water passing through the heat exchanger 2 is collected at the bottom of the water collecting tray 19, the water is conveyed into the spraying device 3 through the water pipe 20 and the water pump 21, cooling water in the water collecting tray 19 is driven by the water pump 21 to uniformly spray onto the surface of the heat exchanger 2 through the water pipe 20 and the spraying device 3, the heat of process fluid in the pipe is absorbed to rise the temperature, the sprayed water flowing out of the heat exchanger 2 is subjected to heat and mass exchange with air on the surface of a water spraying filler, part of water vapor is taken away by the air, the temperature of the sprayed water is reduced, and finally the sprayed water returns to the water collecting tray 19 to complete. At the same time, the liquid drops entrained in the air are blocked by the water-retaining filler and are returned to the water collection tray 19 again.
The cooling tower main body 1 is divided into an upper layer 23 and a lower layer 24, a water-leaking partition plate 22 is arranged between the upper layer 23 and the lower layer 24, the heat exchanger 2 is arranged on the partition plate 22, a fourth water spraying filler 18 is arranged between the lower part of the partition plate 22 and the water collecting tray 19, and the fourth water spraying filler 18 can be used for taking away heat of the water spraying through heat and moisture exchange so as to restore the water spraying to the original state.
The lower layer of water-retaining filler 26 is also arranged under the partition plate 22, the lower layer of water-retaining filler 26 is arranged on one side of the fourth water pouring filler 18, and the lower layer of water-retaining filler 26 is arranged under the partition plate 22. The cooling tower body 1 further comprises an upper layer of water-retaining filler 25, the upper layer of water-retaining filler 25 is arranged on the partition plate 22, and the water-retaining filler is arranged on one side of the heat exchanger 2. The upper-layer water-retaining filler 25 and the lower-layer water-retaining filler 26 are used for blocking water drops taken away by air, and water consumption is reduced.
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 (10)

1. A closed cooling tower comprises a cooling tower main body and is characterized in that a heat exchanger and a spraying system are arranged in the cooling tower main body, the spraying system is used for spraying water to the heat exchanger, the spraying system comprises a spraying device, and the spraying device is arranged above the heat exchanger;
the heat exchanger comprises an inlet collecting pipe and an outlet collecting pipe which are vertically arranged, a plurality of vertical serpentine coils are vertically arranged between the inlet collecting pipe and the outlet collecting pipe, and an inlet and an outlet of each vertical serpentine coil are respectively connected with the inlet collecting pipe and the outlet collecting pipe.
2. The closed cooling tower of claim 1, wherein each of the vertical serpentine coils 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 a center distance between the two adjacent twisted tubes is equal to a major axis distance outside the twisted tubes.
3. The closed cooling tower according to claim 2, wherein the heat exchanger comprises a first inlet header, a second inlet header and an outlet header, the first inlet header and the second inlet header are disposed at a lower portion of the heat exchanger, the outlet header is disposed at an upper portion of the 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, and the first vertical serpentine coil and the second vertical serpentine coil are symmetrically disposed and connected to left and right sides of the outlet header.
4. The closed cooling tower according to claim 2, wherein the heat exchanger comprises a third inlet header, a fourth inlet header and an outlet header, the outlet header is disposed at a lower portion of the heat exchanger, the third inlet header and the fourth inlet header are disposed at an upper portion of the heat exchanger, a third vertical serpentine coil is disposed between the third inlet header and the outlet header, the fourth inlet header and the outlet header bracket are disposed with a fourth vertical serpentine coil, and the third vertical serpentine coil and the fourth vertical serpentine coil are symmetrically disposed and connected to left and right sides of the outlet header, respectively.
5. The closed cooling tower of claim 4, wherein the outlets of the third and fourth inlet headers are each connected to an upper end of the outlet header.
6. The closed cooling tower of claim 1, wherein the spray system further comprises a water collection tray disposed at the bottom of the cooling tower body and water pipes respectively connecting the water collection tray and the spray device, and a water pump is further connected between the spray device and the water collection tray.
7. The closed cooling tower according to claim 6, wherein the cooling tower body is divided into an upper layer and a lower layer, a water-leaking partition plate is arranged between the upper layer and the lower layer, the heat exchanger is arranged above the partition plate, and a fourth water-spraying filler is arranged between the lower surface of the partition plate and the water collecting tray.
8. The closed cooling tower of claim 7, wherein a lower layer of water-retaining filler is further disposed below the partition, the lower layer of water-retaining filler is disposed on one side of the fourth water pouring filler, and the lower layer of water-retaining filler is disposed below the partition.
9. The closed cooling tower of claim 8, wherein the cooling tower body further comprises an upper layer of water-retaining filler, the upper layer of water-retaining filler is disposed above the partition, and the water-retaining filler is disposed on one side of the heat exchanger.
10. The closed cooling tower of claim 1, wherein the cooling tower body comprises an air inlet and an air outlet, and the air inlet is disposed on a side surface of the cooling tower body and above the spray device; the cooling tower main body also comprises a fan, and the fan is arranged at the upper part of the cooling tower main body and is arranged at the air outlet.
CN201911243767.6A 2019-12-06 2019-12-06 Closed cooling tower Pending CN112923753A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911243767.6A CN112923753A (en) 2019-12-06 2019-12-06 Closed cooling tower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911243767.6A CN112923753A (en) 2019-12-06 2019-12-06 Closed cooling tower

Publications (1)

Publication Number Publication Date
CN112923753A true CN112923753A (en) 2021-06-08

Family

ID=76161774

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911243767.6A Pending CN112923753A (en) 2019-12-06 2019-12-06 Closed cooling tower

Country Status (1)

Country Link
CN (1) CN112923753A (en)

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