CN219640745U - Cooling tower - Google Patents

Abstract

The utility model relates to the field of cooling equipment, and discloses a cooling tower, which comprises: the cooling tower comprises a spraying system, a water collecting disc, a vertical falling film type heat exchanger and a fan, wherein the fan is arranged at the upper part of the cooling tower, and the water collecting disc is arranged at the lower part of the cooling tower; the spray system comprises a spray device and a spray water pump, wherein the spray device is connected with the spray water pump through a water pipe, the spray device is connected with the water pipe of the spray water pump to form a conveying water pipe, the vertical falling film type heat exchanger is vertically arranged below the spray device, a filler heat exchange layer is arranged between the water collecting disc and the vertical falling film type heat exchanger, the filler heat exchange layer is filled in the upper space of the water collecting disc, and air inlet grids are arranged on the left side and the right side of the filler heat exchange layer. The cooling tower solves the problems of single function and low heat exchange efficiency of the existing cooling towers.

Description

Cooling tower

Technical Field

The utility model relates to the field of cooling equipment, in particular to a cooling tower.

Background

The cooling tower is high-efficiency cooling equipment, comprises a closed cooling tower and an open cooling tower, mainly utilizes the latent heat of evaporation of water to take away the heat of process fluid (usually circulating water), completes the cooling of the process fluid, and realizes the recycling of spray water. For a closed cooling tower, the process fluid flows inside the coil, conducting heat out of the tube through the tube wall; meanwhile, spray water is sprayed outside the pipe, a water film is formed on the outer wall of the pipe, and heat transfer and mass transfer heat exchange processes are 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, so that the high-efficiency operation of the main equipment is well protected, and the service life is prolonged. For an open cooling tower, the process fluid is directly sprayed onto the filler heat exchange layer through a spraying system to exchange heat and humidity with air, and the heat exchange effect is generally better than that of a closed cooling tower due to one less heat exchange process.

The two types of cooling towers have advantages and disadvantages, and the common cooling towers can only singly select one type of cooling system, so that the cooling towers have single functions, can only be used under one working condition, cannot meet the use requirements of multiple working conditions, and can not be used efficiently in areas with particularly large annual climate change.

In addition, in the horizontal coil closed cooling tower, spray water collides with a smooth circular pipe for heat exchange, when the spray water flow is large, the coil is easy to vibrate, and the collision noise is large; moreover, because the coil pipes are mostly arranged in a regular triangle staggered mode, the air flow channel is smaller, the resistance is larger, scaling is easy to occur on the windward side, and the heat exchange effect is affected.

Therefore, research on a cooling tower is needed to solve the problems of single function and low heat exchange efficiency of the existing cooling tower.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a cooling tower which can improve the heat exchange efficiency of the cooling tower.

In order to achieve the above purpose, the present utility model may be performed by the following technical scheme:

a cooling tower, comprising: the cooling tower comprises a spraying system, a water collecting disc, a vertical falling film type heat exchanger and a fan, wherein the fan is arranged at the upper part of the cooling tower, and the water collecting disc is arranged at the lower part of the cooling tower; the spray system comprises a spray device and a spray water pump, wherein the spray device is connected with the spray water pump through a water pipe, the spray device is connected with the water pipe of the spray water pump to form a conveying water pipe, the vertical falling film type heat exchanger is vertically arranged below the spray device, a filler heat exchange layer is arranged between the water collecting disc and the vertical falling film type heat exchanger, the filler heat exchange layer is filled in the upper space of the water collecting disc, and air inlet grids are arranged on the left side and the right side of the filler heat exchange layer.

The cooling tower comprises a vertical falling film heat exchanger, and is characterized in that the vertical falling film heat exchanger comprises an inlet header, an outlet header and a plurality of vertical falling film serpentine segments arranged between the inlet header and the outlet header, wherein the inlet header is positioned above the vertical falling film heat exchanger, the outlet header is positioned below the vertical falling film heat exchanger, a fluid inlet of the vertical falling film serpentine segments is communicated with the inlet header, a fluid outlet of the vertical falling film serpentine segments is communicated with the outlet header, and a plurality of vertical falling film serpentine segments are mutually arranged in parallel.

The cooling tower as described above, further comprising a water blocking filler disposed above the filler heat exchange layer, the water blocking filler being disposed on a side adjacent to the fan.

The cooling tower as described above, further comprising a water pan arranged below the vertical falling film heat exchanger, the water pan being horizontally arranged between the vertical falling film heat exchanger and the filler heat exchange layer.

The cooling tower is characterized in that the conveying water pipe is further connected with a first pipeline, the inlet header pipe is connected with the conveying water pipe through the first pipeline, a first stop valve is arranged on the first pipeline, and the first stop valve is arranged between the conveying water pipe and the inlet header pipe; the outlet header is connected with a second pipeline; the water collecting disc is also connected with a third pipeline, and a second stop valve and a third stop valve are correspondingly arranged on the second pipeline and the third pipeline respectively.

As described above, the vertical falling film serpentine segment is further in the shape of smooth round tube, low ribbed tube, elliptic tube or twisted tube.

As mentioned above, further, the vertical falling film serpentine segment is composed of a plurality of vertical heat exchange tubes and a plurality of elbows, when the twisted tubes are adopted, when the center distance between two adjacent twisted tubes is equal to the outer long shaft distance of the twisted tubes, a plurality of contact points exist between the adjacent twisted tubes.

As described above, the cooling tower further comprises two adjacent vertical falling film serpentine segments with a spacing ranging from 5 mm to 100mm.

The cooling tower is further provided with a one-way valve between the outlet of the spray water pump and the first pipeline interface, and the direction of the one-way valve is consistent with that of the spray water pump.

The cooling tower is characterized in that the water retaining filler is any one of PVC filler, metal filler or porous ceramic filler; the filler heat exchange layer adopts any one of PVC filler, metal filler or porous ceramic filler.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the cooling tower, the filler heat exchange layer is arranged, and the volume of the filler heat exchange layer is expanded into the whole cooling tower, so that the heat exchange area of air and spray water can be increased, heat dissipation is facilitated, and the heat exchange efficiency of the cooling tower can be improved.

2. According to the cooling tower, the water retaining filler is arranged above the filler heat exchange layer, so that the water flying phenomenon can be effectively prevented.

3. According to the cooling tower, the water receiving disc is arranged below the vertical falling film type heat exchanger, so that spray water dripped by the vertical falling film type heat exchanger can be collected and then uniformly dripped on the surface of the lower filler heat exchange layer, and therefore sufficient heat exchange between process fluid and air is facilitated, and the heat exchange efficiency of the cooling tower can be improved.

4. The cooling tower provided by the utility model can integrate all functions of the closed cooling tower and the open cooling tower under the condition that the volume and the weight are basically unchanged, and can realize multiple operation modes aiming at different areas and different climates, so that the defects of single function and low efficiency of the cooling tower in the prior art are overcome.

5. According to the vertical falling film type heat exchanger, the inlet header and the outlet header are arranged up and down, the plurality of vertical falling film serpentine segments are vertically arranged between the inlet header and the outlet header, and when spraying, the direction of spray water is consistent with the air flow direction, so that the possibility that dry points and scaling are formed on the windward side of the heat exchange tube due to the reverse direction of wind and water can be reduced, the driving of circulating air is realized, the flow speed of a water film is increased, a turbulent flow state is easily formed on the surface of the heat exchange tube, and the heat exchange effect of the spray water and cooling medium in the tube is better. Meanwhile, the problems that in the prior art, the coil pipes are mostly arranged in a regular triangle staggered mode, so that the air flow channel is small, the resistance is large, scaling is easy to occur on the windward side, and the heat exchange effect is affected are solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a cooling tower according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a first configuration of a vertical falling film heat exchanger of a cooling tower according to an embodiment of the present utility model;

fig. 3 is a schematic view of a second structure of a vertical falling film heat exchanger of a cooling tower according to an embodiment of the present utility model.

Wherein: 1. a vertical falling film heat exchanger; 2. a blower; 3. a spray water pump; 4. a filler heat exchange layer; 5. a spraying system; 6. a water collecting tray; 7. water blocking filler; 8. a one-way valve; 9. a first stop valve; 10. a second shut-off valve; 11. a third stop valve; 12. a first pipe; 13. a second pipe; 14. a third conduit; 15. vertical falling film snakelike segment; 16. an inlet header; 17. an outlet header; 18. and (5) a water receiving tray.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples:

it should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.

It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," and the like are directional or positional relationships as indicated based on the drawings, merely to facilitate describing the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Referring to fig. 1 to 3, the present utility model provides a cooling tower, which may include a spray system 5, a water collecting tray 6, a vertical falling film heat exchanger 1, and a fan 2, the fan 2 being disposed at an upper portion of the cooling tower, the water collecting tray 6 being disposed at a lower portion of the cooling tower; the spraying system 5 comprises a spraying device and a spraying water pump 3, the spraying device, the spraying water pump 3 and a water collecting disc 6 are connected through a water pipe, the spraying device and the water pipe of the spraying water pump 3 are connected through a water pipe, the vertical falling film type heat exchanger 1 is vertically arranged below the spraying device, a filler heat exchange layer 4 is arranged between the water collecting disc 6 and the vertical falling film type heat exchanger 1, the filler heat exchange layer 4 is filled in the space above the water collecting disc 6, and air inlet grids are arranged on the left side and the right side of the filler heat exchange layer 4.

Specifically, when in use, the process fluid is sprayed to the outer surface of the vertical falling film type heat exchanger 1 through the spraying device, and as the vertical falling film type heat exchanger 1 is arranged above the filler heat exchange layer 4, the process fluid drops into the filler heat exchange layer 4 under the action of gravity after reaching the outer surface of the vertical falling film type heat exchanger 1, exchanges heat with air entering from the air inlet grille in the filler heat exchange layer 4, then drops back into the water collecting disc 6, and then reaches the spraying device to spray again under the action of the spraying water pump 3. In this embodiment, the space above the water collecting disc 6 is filled with the filler heat exchange layer 4, so that the heat exchange area of air and spray water can be increased, heat dissipation is facilitated, and the heat exchange efficiency of the cooling tower can be improved. Meanwhile, as the vertical falling film type heat exchanger 1 is vertically arranged below the spraying device, under the action of gravity, when the spraying device sprays, spray water forms a falling water film on the surface of the vertical falling film type heat exchanger 1, and under the action of the falling water film, the heat and humidity exchange between the falling water film and process fluid in the vertical falling film type heat exchanger 1 can be completed, so that the condensation effect of the cooling tower can be improved.

In the present embodiment, the filler heat exchange layer 4 may employ any of PVC filler, metal filler, or porous ceramic filler, for example.

In certain embodiments, the vertical falling film heat exchanger 1 comprises an inlet header 16, an outlet header 17 and a plurality of vertical falling film serpentine tube sheets 15 disposed therebetween, the inlet header 16 is positioned above the vertical falling film heat exchanger 1, the outlet header 17 is positioned below the vertical falling film heat exchanger 1, the fluid inlet of the vertical falling film serpentine tube sheets 15 is in communication with the inlet header 16, the fluid outlet of the vertical falling film serpentine tube sheets 15 is in communication with the outlet header 17, and the plurality of vertical falling film serpentine tube sheets 15 are disposed parallel to one another.

Specifically, because the inlet header 16 and the outlet header 17 are arranged up and down, and a plurality of vertical falling film serpentine segments 15 are vertically arranged between the inlet header 16 and the outlet header 17, when spraying, the direction of spray water is consistent with the air flow direction, the spray water film flows along the axial direction of the heat exchange tube, and because circulating air and spray water flow through the heat exchange tube in the same direction, the spray water can well cover the surface of the heat exchange tube, thereby ensuring the surface of the heat exchange tube to be completely wetted, and simultaneously, the possibility of forming dry spots and scaling on the windward side of the heat exchange tube due to the countercurrent of wind and water can be reduced. In addition, as the flowing direction of the spray water film is consistent with that of the circulating air, the spray water film can be driven by the circulating air, the flowing speed of the water film is accelerated, and a turbulent flow state is easily formed on the surface of the vertical falling film serpentine pipe piece 15, so that the heat exchange effect of the spray water and the cooling medium in the pipe is better. The embodiment solves the problems that in the prior art, the coil pipes are mostly arranged in a regular triangle fork row mode, the air flow channel is small, the resistance is large, scaling is easy to occur on the windward side, and the heat exchange effect is affected.

Meanwhile, the vertical falling film serpentine segments 15 are arranged in parallel, the number of the vertical falling film serpentine segments 15 can be reasonably designed according to the heat exchange quantity of the vertical falling film heat exchanger 1, the distances between the adjacent vertical falling film serpentine segments 15 are the same, the distance can be designed according to the air flow rate, and the distance between the two adjacent vertical falling film serpentine segments 15 is 5-100 mm in an exemplary range. When the distance is large, a small amount of filler can be inserted between the two parts, so that spray water is prevented from directly dripping into the water collecting disc 6, and meanwhile, the contact area between the spray water and circulating air can be increased, and the temperature of the spray water can be effectively cooled.

As a preferred embodiment, in some examples, the vertical falling film serpentine segment 15 is in the shape of a smooth round tube, a low ribbed tube, an oval tube, or a twisted tube.

When the vertical falling film serpentine segment 15 is in the shape of a smooth round tube, the vertical falling film heat exchanger 1 of the present embodiment is shown in fig. 2. In this embodiment, adjacent vertical falling film serpentine segments 15 have a certain gap therebetween and do not contact each other. The water film flows downwards along the surface of the circular tube to completely cover the surface of the heat exchange tube, the turbulence degree of the water film is increased by air, and the thickness of the boundary layer is reduced, so that the heat exchange effect of the cooled medium and the water film in the tube and the heat exchange effect of the water film and the air can be increased.

When the vertical falling film serpentine sheet 15 is in the shape of a twisted tube, the vertical falling film heat exchanger 1 of the present embodiment is shown in fig. 3. In this embodiment, the vertical falling film serpentine segment 15 is formed by a plurality of vertical heat exchange tubes and a plurality of elbows, when the heat exchange tubes adopt the form of twisted tubes, besides the advantages of the vertical falling film serpentine segment 15 adopting smooth round tubes, the cross section of each twisted tube is elliptical, the center distance between two adjacent twisted tubes is equal to the distance between the outer long axes of the twisted tubes, a plurality of contact points exist between the adjacent twisted tubes, the effect of mutual support can be achieved through the contact points, vibration of the heat exchange tubes due to the skip of spray water and high-speed air flow can be effectively prevented, so that the flow rate of air outside the tubes can be improved, and the heat exchange efficiency of the cooling tower can be improved.

In certain embodiments, a water blocking filler 7 is further included above the filler heat exchange layer 4, the water blocking filler 7 being disposed on a side near the fan 2. Specifically, the upper portion of the cooling tower is provided with an upper ventilation opening, the fan 2 is arranged in the upper ventilation opening, air enters the cooling tower from the air inlet grille of the filler heat exchange layer 4, and then part of the air is discharged from the upper ventilation opening under the action of the fan 2 to form circulation of air. Because the air can exchange heat and humidity with the process fluid or spray water which drips into the filler heat exchange layer 4, when the air flows through the filler heat exchange layer 4, the air can carry certain moisture, and when the air passes through the water retaining filler 7, the moisture in the air can be removed, so that the air discharged from the cooling tower is drier, the loss of the process fluid or spray water in the cooling tower can be reduced, and the water flying phenomenon can be effectively prevented.

In the present embodiment, the water blocking filler 7 may be exemplified by any one of PVC filler, metal filler, or porous ceramic filler.

In certain embodiments, a water pan 18 is also provided below the vertical falling film heat exchanger 1, the water pan 18 being horizontally disposed between the vertical falling film heat exchanger 1 and the packed heat exchange layer 4. Specifically, by arranging the water pan 18 below the vertical falling film heat exchanger 1, spray water dropped from the vertical falling film heat exchanger 1 can be collected and then uniformly dropped on the surface of the filler heat exchange layer 4 below, so that the full heat exchange between process fluid and air is facilitated, and the heat exchange efficiency of the cooling tower can be improved.

In some embodiments, a first pipe is connected to the delivery pipe, the inlet header 16 is connected to the delivery pipe through the first pipe, and a first stop valve 9 is disposed on the first pipe, and the first stop valve 9 is disposed between the delivery pipe and the inlet header 16; the outlet header 17 is connected to a second pipe; the water collecting disc 6 is also connected with a third pipeline, and a second stop valve 10 and a third stop valve 11 are correspondingly arranged on the second pipeline and the third pipeline respectively.

Specifically, the first pipeline, the second pipeline and the third pipeline form a supply circulation route, the first pipeline, the second pipeline and the third pipeline are respectively provided with a first stop valve 9, a second stop valve 10 and a third stop valve 11 correspondingly, and the flow direction of the process fluid can be regulated through the opening and closing states of the first stop valve 9, the second stop valve 10 and the third stop valve 11.

Further, a one-way valve 8 is arranged between the outlet of the spray water pump 3 and the first pipeline interface, and the direction of the one-way valve 8 is consistent with the direction of the spray water pump 3. Specifically, through setting up check valve 8, can guarantee the rivers direction under the effect of spray water pump 3, the water in the water pipe can not flow backwards in the water collecting tray 6 to guaranteed the stability of cooling tower performance.

In addition, the cooling tower integrates the functions of the closed cooling tower and the open cooling tower under the condition of unchanged volume, and when the cooling tower is used, three operation modes are respectively a summer operation mode, a transition season operation mode and a winter operation mode according to different seasons, so that the problems of single function and low efficiency of the cooling tower in the prior art are solved.

When the temperature in summer is higher, the cooling tower is started in a summer operation mode, and is in an open cooling tower mode. The specific operation is as follows: the spray water pump 3 and the fan 2 are started, the second stop valve 10 is closed, the first stop valve 9 and the third stop valve 11 are opened, and the spray water in the water collecting disc 6 is completely emptied. The cooled process fluid passes through the inlet of the first pipeline 12, passes through the first stop valve 9 and is uniformly sprayed on the surface of the vertical falling film type heat exchanger 1 by the spraying system 5, the cooled process fluid flowing out of the vertical falling film type heat exchanger 1 exchanges heat with air entering from the air inlet grille on the surface of the filler heat exchange layer 4, heat is taken away by the air, the temperature of the process fluid is reduced, and then the process fluid drops into the water collecting disc 6. The process fluid is continuously subjected to spray heat exchange circulation by the action of the spray water pump 3 until the temperature reaches the use requirement, and finally is supplied to a user or equipment again by the third pipeline 14 and the third stop valve 11.

Because the temperature of the environment is higher in summer, the wet bulb temperature difference between the cooled process fluid and the ambient air is smaller, the direct heat exchange type open cooling tower mode has better heat exchange effect than the indirect heat exchange type closed cooling tower mode, and the direct heat exchange type open cooling tower mode is suitable for the open cooling tower mode especially when the cooled process fluid is nontoxic and not easy to volatilize and has low requirement on cleanliness.

When the temperature is lower and higher than 0 ℃ in transitional seasons, such as spring and autumn, the cooling tower is started to operate in a transitional season mode, and the closed cooling tower is in a complete mode. The specific operation is as follows: the spray water pump 3 and the fan 2 are started, the first stop valve 9 and the third stop valve 11 are closed, the second stop valve 10 is opened, the cooled process fluid enters through the inlet header 16 of the vertical falling film heat exchanger 1, the cooling water in the water collecting disc 6 is uniformly sprayed on the surface of the vertical falling film heat exchanger 1 through the spray system 5 driven by the spray water pump 3, the heat of the process fluid in the pipe is absorbed to raise the temperature, the spray water flowing out of the heat exchanger exchanges heat and humidity with the air entering from the air inlet grille on the surface of the filler heat exchange layer 4, part of water absorbs heat and evaporates to be taken away by the air, the temperature of the rest spray water is reduced, and finally the rest spray water returns to the water collecting disc 6 to complete one cycle. The droplets entrained in the air are blocked by the water-blocking filler 7 from being returned to the water-collecting tray 6. The cooled process fluid is reduced in temperature and is then supplied back to the user or apparatus via the outlet header 17, through the second shut-off valve 10 and the second conduit 13.

Because the ambient temperature is lower in the transitional season, the difference between the temperature of the cooled process fluid and the wet bulb temperature of the surrounding environment is larger, and the heat can be completely taken away through an indirect heat exchange type closed cooling tower mode.

When the temperature in winter is lower than 0 ℃, the cooling tower starts a winter operation mode, and is a simple closed cooling tower mode. The specific operation is as follows: the spray water pump 3 is turned off, the fan 2 is turned on, the first stop valve 9 and the third stop valve 11 are turned off, the second stop valve 10 is turned on, the cooled process fluid enters through the inlet header 16 of the vertical falling film heat exchanger 1, the low-temperature air in the surrounding environment of the cooling tower is driven by the fan 2 to flow through the vertical falling film heat exchanger 1, the heat of the process fluid in the pipe is absorbed to rise in temperature, and then the cooled process fluid leaves the cooling tower. The cooled process fluid is reduced in temperature and is then supplied back to the user or apparatus via the outlet header 17, through the second shut-off valve 10 and the second conduit 13.

At this time, the spray water in the water collecting disc 6 is completely emptied, so that the normal operation of the cooling tower is prevented from being influenced due to icing caused by the fact that the ambient temperature is lower than 0 ℃. Meanwhile, as only the fan 2 is started and the spray water pump 3 is closed, the running power is lower, and the power is saved compared with the running mode in the transitional season.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the essence of the present utility model are intended to be included within the scope of the present utility model.

Claims (10)

1. A cooling tower, comprising: the cooling tower comprises a spraying system, a water collecting disc, a vertical falling film type heat exchanger and a fan, wherein the fan is arranged at the upper part of the cooling tower, and the water collecting disc is arranged at the lower part of the cooling tower; the spray system comprises a spray device and a spray water pump, wherein the spray device is connected with the spray water pump through a water pipe, the spray device is connected with the water pipe of the spray water pump to form a conveying water pipe, the vertical falling film type heat exchanger is vertically arranged below the spray device, a filler heat exchange layer is arranged between the water collecting disc and the vertical falling film type heat exchanger, the filler heat exchange layer is filled in the upper space of the water collecting disc, and air inlet grids are arranged on the left side and the right side of the filler heat exchange layer.

2. The cooling tower of claim 1, wherein the vertical falling film heat exchanger includes an inlet header, an outlet header and a plurality of vertical falling film serpentine segments disposed therebetween, the inlet header being positioned above the vertical falling film heat exchanger, the outlet header being positioned below the vertical falling film heat exchanger, a fluid inlet of the vertical falling film serpentine segments being in communication with the inlet header, a fluid outlet of the vertical falling film serpentine segments being in communication with the outlet header, and the plurality of vertical falling film serpentine segments being disposed parallel to one another.

3. The cooling tower of claim 1, further comprising a water deflector filler disposed above the filler heat exchange layer, the water deflector filler disposed proximate to a side of the fan.

4. The cooling tower of claim 1, further comprising a water pan disposed below the vertical falling film heat exchanger, the water pan being horizontally disposed between the vertical falling film heat exchanger and the packed heat exchange layer.

5. The cooling tower of claim 2, wherein a first conduit is connected to the delivery conduit, the inlet header is connected to the delivery conduit by the first conduit, and a first shut-off valve is disposed on the first conduit, the first shut-off valve being interposed between the delivery conduit and the inlet header; the outlet header is connected with a second pipeline; the water collecting disc is also connected with a third pipeline, and a second stop valve and a third stop valve are correspondingly arranged on the second pipeline and the third pipeline respectively.

6. The cooling tower of claim 2, wherein the vertical falling film serpentine tube sheet is in the shape of a smooth round tube, a low ribbed tube, an oval tube, a twisted tube.

7. The cooling tower according to claim 2, wherein the vertical falling film serpentine tube sheet is composed of a plurality of vertical heat exchange tubes and a plurality of bends, and when the twisted tube is adopted, a plurality of contact points exist between adjacent twisted tubes when the center distance between two adjacent twisted tubes is equal to the outer long axis distance of the twisted tubes.

8. The cooling tower of claim 2, wherein the spacing between two adjacent vertical falling film serpentine segments ranges from 5 to 100mm.

9. The cooling tower of claim 1, wherein a one-way valve is disposed between the outlet of the spray water pump and the first pipe connection, the one-way valve being oriented in the same direction as the spray water pump.

10. A cooling tower according to claim 3, wherein the water retaining filler is any one of PVC filler, metal filler or porous ceramic filler; the filler heat exchange layer adopts any one of PVC filler, metal filler or porous ceramic filler.