CN211651280U - Vertical falling film type closed cooling tower - Google Patents

Abstract

The utility model relates to the technical field of cooling towers, in particular to a vertical falling film type 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

A vertical falling film closed cooling tower

technical field

The utility model relates to the technical field of cooling towers, in particular to a vertical falling film type closed cooling tower.

Background technique

Cooling tower is a kind of high-efficiency cooling equipment, which mainly uses the latent heat of evaporation of water to take away the heat of the process fluid (usually circulating water), completes the cooling of the process fluid, and realizes the recycling of spray water. For the closed cooling tower, the process fluid flows in the coil and conducts heat to the outside of the tube through the tube wall; at the same time, there is spray water outside the tube for spraying, forming a water film on the outer wall of the tube, under the action of air , through spray evaporation, the heat exchange process of heat transfer and mass transfer occurs outside the tube, so as to achieve heat transfer.

The tubular evaporative cooling coil and the water-spraying filler are the core components of the closed cooling tower, and their performance directly affects the cooling effect of the closed cooling tower. The function of the water spray filler in the cooling tower is to further cool the spray water heated by heat exchange with the fluid in the coil by increasing the contact surface area of water and air, prolonging the contact time, and improving the efficiency of the cooling tower. Most of the existing cooling towers use horizontal coil type heat exchangers as heat exchange equipment, and most of the coils use smooth metal round tubes, but their heat exchange efficiency is relatively low, the material consumption is large, and the construction cost is high. Its use and promotion are limited to a certain extent.

In the existing horizontal coil cooling tower, the spray water collides with the smooth round tube for heat exchange. When the flow rate of the spray water is large, the coil is easy to vibrate, and the collision noise is large; the spray water flows from top to bottom , the cooling water in the tube flows horizontally, and the two flow in a staggered manner; in addition, because most of the coils are arranged in a equilateral triangular cross-row arrangement, the air flow channel is small, the resistance is large, and the windward side is easy to scale, which affects the heat exchange effect.

It can be seen that the cooling tower in the prior art has the following deficiencies:

1. Most of the existing coils are arranged in a regular triangle fork arrangement, the air flow channel is small, the resistance is large, and the windward side is easy to scale, and the spray water flows from top to bottom, and the cooling water in the pipe flows horizontally. The staggered flow will affect the heat transfer effect.

2. The existing coils are generally smooth round pipes. When the spray water flow is large, the coils are easy to vibrate, and the collision noise is large.

Utility model content

The purpose of the invention of the present utility model is: in order to solve the problems existing in the prior art, the present utility model provides a vertical falling film type closed cooling tower.

In order to solve the problems existing in the prior art, the utility model adopts the following technical solutions:

A vertical falling-film closed cooling tower includes a cooling tower body, a heat exchanger and a spray system are arranged in the cooling tower body, and the spray system is used for spraying water to the heat exchanger , the spray system includes a spray device, and the spray device is placed above the heat exchanger; the heat exchanger includes a vertical inlet header and an outlet header, the inlet header A number of vertical serpentine coils are vertically arranged between the outlet header and the outlet header, and the inlet and outlet of each piece of the vertical serpentine coil are respectively connected to the inlet header and the outlet header. .

As an improvement of the technical scheme of the vertical falling film closed cooling tower of the present invention, each piece of the vertical serpentine coil tube is composed of a plurality of twisted tube coils. When the center distance is equal to the distance from the outer long axis of the twisted tubes, there are several contact points between the two twisted tubes.

As an improvement of the technical solution of the vertical falling film 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 The tube and the second inlet header are placed in the lower part of the heat exchanger, the outlet header is placed in the upper part of the heat exchanger, and the first inlet header and the outlet header are arranged between There is a first vertical serpentine coil, a second vertical serpentine coil is arranged between the second inlet header and the outlet header, the first vertical serpentine coil and the first vertical serpentine Two vertical serpentine coils are symmetrically arranged and connected to the left and right sides of the outlet header respectively.

As an improvement of the technical scheme of the vertical falling film closed cooling tower of the present invention, the heat exchanger includes a third inlet header, a fourth inlet header and an outlet header, and the outlet header is arranged In the lower part of the heat exchanger, the third inlet header and the fourth inlet header are placed on the upper part of the heat exchanger, and the third inlet header and the outlet header are arranged between There is a third vertical serpentine coil, the fourth inlet header and the outlet header bracket are provided with a fourth vertical serpentine coil, the third vertical serpentine coil and the fourth The vertical serpentine coils are symmetrically arranged and connected to the left and right sides of the outlet header respectively.

As an improvement of the technical solution of the vertical falling film closed cooling tower of 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 vertical falling-film closed cooling tower of the present invention, the spray system further includes a water collecting tray placed at the bottom of the main body of the cooling tower, and a water collecting tray connected to the water collecting tray and the cooling tower respectively. The water pipe of the spraying device is also connected with a water pump between the spraying device and the water collecting tray.

As an improvement of the technical scheme of the vertical falling-film closed cooling tower of the present invention, the cooling tower main body is divided into an upper layer and a lower layer, and a water-leakable partition is arranged between the upper layer and the lower layer, so 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 pan.

As an improvement of the technical scheme of the vertical falling-film closed cooling tower of the present invention, a lower layer of water-retaining filler is also arranged below the partition plate, and the lower-layer water-retaining filler is placed on the fourth water shower filler on one side of the plate, and the lower layer of water-retaining filler is arranged below the partition.

As an improvement of the technical scheme of the vertical falling-film closed cooling tower of the present invention, the cooling tower main body also includes an upper layer of water-retaining filler, the upper-layer water-retaining filler is placed on the top of the partition, and The water blocking packing is placed on one side of the heat exchanger.

As an improvement of the technical scheme of the vertical falling film closed cooling tower of the present invention, the cooling tower main body includes an air inlet and an air outlet, and the air inlet is placed on the side of the cooling tower main body and is The main body of the cooling tower also includes a fan, and the fan is placed on the upper part of the main body of the cooling tower and at the air outlet.

Compared with the prior art, the beneficial effects of the present utility model:

1. In the present utility model, since the inlet header and the outlet header are arranged vertically, and a number of vertical serpentine coils are arranged vertically between the inlet header and the outlet header, when spraying, the The direction of the water spray is consistent with the direction of the vertical serpentine coil, which reduces the possibility of scaling due to the reverse of feng shui forming a dry spot on the windward side of the heat exchange tube, and realizes that relying on the driving of circulating air, the flow speed of the water film is accelerated , it is easy to form a turbulent state on the surface of the heat exchange tube, which makes the heat exchange effect between the spray water and the cooling medium in the tube better, and solves the problem in the prior art because most of the coils are arranged in a regular triangle fork arrangement, and the air flow channel Smaller, larger resistance, and the windward side is easy to scale, which affects the heat exchange effect.

2. Since the vertical serpentine coil is composed of multiple twisted tubes, when the center distance between adjacent twisted tubes is equal to its outer long axis, there will be several contact points between adjacent twisted tubes. The contact points play a role of mutual support, which can effectively prevent the heat exchange tube from vibrating due to the skipping of spray water and high-speed airflow, thereby increasing the flow rate of the air outside the tube.

Description of drawings

Fig. 1 is the structural representation of the first embodiment of the present utility model;

Fig. 2 is the structural representation of the heat exchanger of Fig. 1;

Fig. 3 is the structural representation of the first embodiment of the present utility model;

Fig. 4 is the structural representation of the heat exchanger of Fig. 1;

Fig. 5 is the structural representation of the first embodiment of the present utility model;

Fig. 6 is the structural representation of the heat exchanger of Fig. 1;

Fig. 7 is the structural representation of the first embodiment of the present utility model;

Fig. 8 is the structural representation of the heat exchanger of Fig. 1;

FIG. 9 is a schematic diagram of a heat exchanger provided with coils in the prior art.

Description of reference numerals: 1-cooling tower body; 2-heat exchanger; 3-spraying device; 4-inlet header; 5-outlet header; 6-vertical serpentine coil; 7-first inlet header tube; 8-second inlet header; 9-first vertical serpentine coil; 10-second vertical serpentine coil; 11-third inlet header; 12-fourth inlet header; 13- The third vertical serpentine coil; 14- the fourth vertical serpentine coil; 15- the first water filling; 16- the second water filling; 17- the third water filling; 18- the fourth water Packing; 19-water collecting tray; 20-water pipe; 21-water pump; 22-partition; 23-upper layer; 24-lower layer; 25-upper water retaining packing; 26-lower water retaining packing; 27-fan.

Detailed ways

In order to make the invention purpose, technical solutions and beneficial effects of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described above are only a part of the embodiments of the present invention, but not all of the embodiments.

As shown in Figure 1, a vertical falling-film closed cooling tower includes a cooling tower main body 1, a heat exchanger 2 and a spray system are arranged in the cooling tower main body 1, and the spray system is used to send the heat exchanger to the heat exchanger. 2 spray water. The spray system includes a spray device 3 , and the spray device 3 is placed above the heat exchanger 2 .

The heat exchanger 2 includes a vertically arranged inlet header 4 and an outlet header 5, and a number of vertical serpentine coils 6 are vertically arranged between the inlet header 4 and the outlet header 5. The inlet and outlet of the shaped coil 6 are connected to the inlet header 4 and the outlet header 5, respectively.

Since several pieces of vertical serpentine coils 6 parallel to each other are vertically arranged between the inlet header 4 and the outlet header 5, and since the spray system is placed above the heat exchanger 2, when the spray system is directed to the heat exchanger 2 When water is sprayed, the water flows from top to bottom along the outer surface of the heat exchanger 2, and a water film is formed on the outer surface of the heat exchanger 2. When the direction of the water film is the same as the direction of the air flow, the co-current flow reduces the possibility of scaling due to the formation of dry spots on the windward side of the heat exchange tube due to the reverse of feng shui. Also because the water film and the circulating air flow in the same direction, relying on the driving of the circulating air, the flow speed of the water film is accelerated, and it is easy to form a turbulent state on the outer surface of the heat exchanger 2, so the boundary layer of the spray water on the surface of the heat exchange tube is thinner. , so that the heat exchange effect between the spray water and the cooling medium in the tube is better, and the consumption of spray water can be saved, so the power of the spray pump 21 can be reduced, making the closed cooling tower overall economical, better heat exchange effect, saving heat exchange 2 volume, weight and consumables. At the same time, due to the vertical arrangement of several vertical serpentine coils 6, the existing problems in the prior art are solved because most of the coils are arranged in a regular triangle fork arrangement, the air flow channel is small, the resistance is large, and the windward side It is easy to scale and affect the heat exchange effect. The structure of the spray device 3 is the same as the conventional structure, so it is not repeated here.

In the present invention, the cooling tower main body 1 includes an air inlet and an air outlet, the air inlet is placed on the side of the cooling tower main body 1 and above the spray device 3, and the air outlet is placed beside the air inlet. After the tuyere enters the main body 1 of the cooling tower, the air flows in the direction of the heat exchanger 2, and then flows to the air outlet for discharge, completing an air circulation. Preferably, the cooling tower main body 1 also includes a fan 27, which is placed on the upper part of the cooling tower main body 1 and at the air outlet. The fan 27 can speed up the air flow in the vertical falling film closed cooling tower. speed.

Each piece of vertical serpentine coil tube 6 is composed of a plurality of twisted tube coils. When the center distance between two adjacent twisted tubes is equal to the distance from the outer long axis of the twisted tube, there are several contacts between the two twisted tubes. point. Since the cross-section of the twisted tube is elliptical, when the center distance between adjacent twisted tubes is equal to the outer long axis of the tube, there will be several contact points between adjacent twisted tubes, and these contact points play a role of mutual support, It can effectively prevent the heat exchange tube from vibrating due to the skipping of spray water and high-speed airflow, so that the flow velocity of the air outside the tube can be increased. Preferably, there is a distance between two adjacent vertical serpentine coil tubes 6, and the range of the distance is 5-100 mm, which can more effectively avoid the vibration between adjacent twisted tubes. When the distance between the serpentine coils 6 is 5-100mm, the wind speed is within the normal range and the air resistance is the smallest. More preferably, since several pieces of vertical serpentine coils 6 are arranged in parallel, the number of vertical serpentine coils 6 can be reasonably set according to the size of the vertical falling film closed cooling tower, and the design is carried out according to the air flow rate. When the distance is large, a small amount of filler can be inserted between the two to prevent the spray water from dripping directly into the water receiving tray, and at the same time, the contact area between the spray water and the circulating air can be increased to effectively cool its temperature.

As the first embodiment of the present invention, as shown in FIG. 1 and FIG. 2 , the heat exchanger 2 includes an inlet header 4 and an outlet header 5 , and an inlet header 4 is placed on the side of the heat exchanger 2 . In the upper part, an outlet header 5 is placed in the lower part of the heat exchanger 2, and several pieces of vertical serpentine coils 6 are arranged vertically and parallel to each other between the inlet header 4 and the outlet header 5. The serpentine coils 6 are arranged vertically and parallel to each other between the inlet header 4 and the outlet header 5, that is, several pieces of vertical serpentine coils 6 are consistent with the direction of the spray water flow, which not only solves the problem of existing In the technology, because most of the coils are arranged in a regular triangle fork arrangement, the air flow channel is small, the resistance is large, and the windward side is easy to scale, which affects the heat exchange effect, and the spray water is also accelerated by the air flow. The speed of the flow, driven by the air, accelerates the flow speed of the water film, the flow speed of the water film is faster, and it is easy to form a turbulent state on the surface of the heat exchanger 2, so the boundary layer of the spray water on the surface of the heat exchange tube is relatively high. It is thin, so that the heat exchange effect between the spray water and the cooling medium in the tube is better, and the consumption of spray water can be saved. Therefore, the power of the spray pump 21 can be reduced, which makes the overall economical and heat exchange effect of the vertical falling film closed cooling tower. better.

As the second embodiment of the present invention, as shown in Figures 3 and 4, the 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 placed in the lower part of the heat exchanger 2, the outlet header 5 is placed in the upper part of the heat exchanger 2, and a first vertical snake is arranged between the first inlet header 7 and the outlet header 5 9, a second vertical serpentine coil 10 is arranged between the second inlet header 8 and the outlet header 5, and the first vertical serpentine coil 9 and the second vertical serpentine coil 10 are symmetrical It is installed and connected to the left and right sides of the outlet header 5 respectively, which can be applied to the occasions where the flow rate of the process fluid is large. The flow rate of the process fluid of the single-piece vertical serpentine coil 6, thereby reducing frictional resistance. At the same time, by arranging the first vertical serpentine coil 9 and the second vertical serpentine coil 10 in a left-right symmetrical manner, it is beneficial to reduce the length of the entire heat exchanger 2, thereby reducing the vertical falling film closed cooling tower. Overall dimensions, reducing footprint. There is a gap between the first vertical serpentine coil 9 and the second vertical serpentine coil 10, and the first watering filler 15 is placed in the gap, which can increase the contact surface area of water and air, prolong the contact time, and reduce the The spray water heated up by heat exchange with the process fluid in the first vertical serpentine coil 9 and the second vertical serpentine coil 10 is further cooled to improve the efficiency of the cooling tower.

As the third embodiment of the present invention, as shown in Figures 5 and 6, the heat exchanger 2 includes a third inlet header 11, a fourth inlet header 12 and an outlet header 5, and the outlet header 5 is arranged In the lower part of the heat exchanger 2, the third inlet header 11 and the fourth inlet header 12 are placed on the upper part of the heat exchanger 2, and a third vertical snake is arranged between the third inlet header 11 and the outlet header 5. Shaped coil 13, the fourth inlet header 12 and the outlet header 5 brackets are provided with a fourth vertical serpentine coil 14, and the third vertical serpentine coil 13 and the fourth vertical serpentine coil 14 are symmetrically arranged , and are connected to the left and right sides of the outlet header 5 respectively. Compared with the second embodiment, the difference between this embodiment and the second embodiment is that the inlet and outlet directions of the vertical falling film closed cooling tower heat exchanger 2 are opposite, and there is a certain gap between the left and right vertical serpentine coils 6 , the size of this gap can be adjusted, and by placing fillers in this gap, the contact area between the spray water and the circulating air can be increased, and its temperature can be effectively cooled. There is a gap between the third vertical serpentine coil 13 and the fourth vertical serpentine coil 14, and a second water spray filler 16 is placed in the gap, which can increase the contact surface area of water and air, prolong the contact time, and reduce the The spray water heated up by heat exchange with the process fluid in the third vertical serpentine coil 13 and the fourth vertical serpentine coil 14 is further cooled to improve the efficiency of the cooling tower. At the same time, the spray water will not be blocked by the outlet header 5, and is directly sprayed in the spray water filler, which can increase the contact area between the spray water and the circulating air, and effectively cool its temperature.

As the 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 in the same direction as the upper end of the outlet header 5 . connect. On the basis of the above-mentioned third embodiment, the third vertical serpentine coil 13 and the fourth vertical serpentine coil 14 are close to each other, and the third vertical serpentine coil 13 and the fourth serpentine coil are Both are connected to the upper end of the outlet header 5 . In detail, one side of the third vertical serpentine coil 13 is in contact with one side of the fourth vertical serpentine coil 14, and the outlet of the third vertical serpentine coil 13 is in contact with the fourth vertical serpentine The outlets of the coils 14 are all connected to the upper ends of the outlet headers 5 . Compared with the third embodiment, the difference between this embodiment and the third embodiment is that the outlets of the left and right vertical serpentine coils 6 are all located at the highest part of the outlet header 53, and the gaps in the third embodiment are gone, so that the width of the heat exchanger 2 is reduced. smaller. Since one side of the third vertical serpentine coil 13 and one side of the fourth vertical serpentine coil 14 are in contact, the other side of the third vertical serpentine coil 13 and the fourth vertical serpentine coil The other side of the pipe 14 is placed with a third water spray filler 17, which can increase the contact surface area between water and air, prolong the contact time, and improve the efficiency of the cooling tower.

The spray system also includes a water collecting tray 19 , a water pipe 20 and a water pump 21 . The water collecting pan 19 is placed at the bottom of the cooling tower main body 1 , the water pipes 20 are respectively connected to the water collecting pan 19 and the spray device 3 , and a water pump 21 is also connected between the spray device 3 and the water collecting pan 19 . When in use, water is sprayed to the heat exchanger 2 through the water spray device, the water collecting tray 19 collects the water passing through the heat exchanger 2 at the bottom, and sends the water to the spray device 3 through the water pipe 20 and the water pump 21 In the middle, the cooling water in the water collecting tray 19 is driven by the water pump 21, flows through the water pipe 20 and the spray device 3 and sprays evenly onto the surface of the heat exchanger 2, absorbs the heat of the process fluid in the pipe and raises the temperature, and releases the heat from the heat exchanger. 2. The outflowing sprayed water exchanges heat and mass with the air on the surface of the spraying packing, part of the water vapor is taken away by the air, the temperature of the sprayed water decreases, and finally returns to the water collecting tray 19 to complete a water cycle. At the same time, the droplets entrained in the air are blocked by the water blocking packing and return to the water collecting tray 19 again.

The cooling tower main body 1 is divided into an upper layer 23 and a lower layer 24, between the upper layer 23 and the lower layer 24, a water-leakable partition plate 22 is arranged, the above-mentioned heat exchanger 2 is arranged on the upper layer of the partition plate 22, and the bottom of the partition plate 22 and the water collecting A fourth water shower filler 18 is arranged between the discs 19, and the fourth water shower filler 18 can be used to take away the heat of the spray water through heat and moisture exchange, so that the spray water can be restored to its original state.

A lower water-blocking filler 26 is also provided below the partition plate 22 , the lower-layer water-blocking filler 26 is placed on one side of the fourth water-spraying filler 18 , and the lower-layer water-blocking filler 26 is arranged under the partition plate 22 . The cooling tower main body 1 also includes an upper water blocking filler 25 , the upper water blocking filler 25 is placed on the top of the partition plate 22 , and the water blocking filler is placed on one side of the heat exchanger 2 . Both the upper water blocking filler 25 and the lower water blocking filler 26 are used to block the water droplets carried away by the air and reduce water consumption.

Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Claims (10)

1. A vertical falling film type closed cooling tower, comprising a cooling tower main body, characterized in that, a heat exchanger and a spray system are provided in the cooling tower main body, and the spray system is used to send the cooling tower to the cooling tower. The heat exchanger sprays water, the spray system includes a spray device, and the spray device is placed above the heat exchanger; The heat exchanger includes an inlet header and an outlet header arranged vertically, and several pieces of vertical serpentine coils are vertically arranged between the inlet header and the outlet header, and each piece of the vertical serpentine coil is arranged vertically. The inlet and outlet of the serpentine coil are connected to the inlet header and the outlet header, respectively. 2. The vertical falling-film closed cooling tower according to claim 1, wherein each piece of the vertical serpentine coil is composed of a plurality of twisted tube coils, and the two adjacent twisted tubes are formed in a coiled shape. When the center distance between the two twisted tubes is equal to the distance from the outer long axis of the twisted tubes, there are several contact points between the two twisted tubes. 3 . The vertical falling film 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 outlet header. 4 . The inlet header and the second inlet header are placed in the lower part of the heat exchanger, the outlet header is placed in the upper part of the heat exchanger, and the first inlet header and the outlet header are placed between the first inlet header and the outlet header. A first vertical serpentine coil is arranged between the second inlet header and the outlet header, and a second vertical serpentine coil is arranged between the second inlet header and the outlet header. The second vertical serpentine coils are symmetrically arranged and connected to the left and right sides of the outlet header respectively. 4. The vertical falling film 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 The tube is placed in the lower part of the heat exchanger, the third inlet header and the fourth inlet header are placed in the upper part of the heat exchanger, and the third inlet header and the outlet header are placed in the upper part of the heat exchanger. A third vertical serpentine coil is arranged between the two, the fourth inlet header and the outlet header bracket are provided with a fourth vertical serpentine, the third vertical serpentine and the The fourth vertical serpentine coils are symmetrically arranged and connected to the left and right sides of the outlet header respectively. 5 . The vertical falling-film closed-circuit cooling tower according to claim 4 , wherein the outlets of the third inlet header and the fourth inlet header are both in phase with the upper end of the outlet header. 6 . connect. 6 . The vertical falling-film closed cooling tower according to claim 1 , wherein the spray system further comprises a water collecting tray placed at the bottom of the main body of the cooling tower and connected to the water collecting trays respectively. 7 . The water pipe of the pan and the spraying device, and a water pump is also connected between the spraying device and the water collecting pan. 7 . The vertical falling-film closed cooling tower according to claim 6 , wherein the main body of the cooling tower is divided into an upper layer and a lower layer, and a water-leakable partition is arranged between the upper layer and the lower layer. 8 . , 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 pan. 8 . The vertical falling-film closed cooling tower according to claim 7 , wherein a lower layer of water-retaining filler is also provided below the partition plate, and the lower-layer water-retaining filler is placed in the fourth shower. 9 . on one side of the water packing, and the lower layer of the water blocking packing is arranged under the partition. 9 . The vertical falling-film closed cooling tower according to claim 8 , wherein the cooling tower main body further comprises an upper layer of water-retaining filler, and the upper-layer water-retaining filler is placed on the top of the partition plate 9 . , and the water blocking packing is placed on one side of the heat exchanger. 10 . The vertical falling film closed cooling tower according to claim 1 , wherein the cooling tower main body includes an air inlet and an air outlet, and the air inlet is placed on the side of the cooling tower main body. 11 . and above the spray device; the cooling tower body further includes a fan, and the fan is placed on the upper part of the cooling tower body and at the air outlet.

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