CN219829559U

CN219829559U - Evaporation type condenser

Info

Publication number: CN219829559U
Application number: CN202320194615.7U
Authority: CN
Inventors: 朱冬生; 陈二雄; 丁盛; 展学峰; 尹继英; 涂爱民; 陈晓环; 井维海; 林宝森; 刘世杰
Original assignee: Harbin Air Conditioning Co ltd; Guangzhou Institute of Energy Conversion of CAS
Current assignee: Harbin Air Conditioning Co ltd; Guangzhou Institute of Energy Conversion of CAS
Priority date: 2023-02-13
Filing date: 2023-02-13
Publication date: 2023-10-13
Anticipated expiration: 2033-02-13

Abstract

The utility model relates to the field of cooling equipment, and discloses an evaporative condenser which comprises a box body, wherein a vertical falling film efficient condenser, a spraying system and a water collecting disc are arranged in the box body; the vertical falling film high-efficiency condenser is arranged on the upper portion of the box body, the spraying system comprises a spraying device, the spraying device is arranged above the vertical falling film high-efficiency condenser, the water collecting disc is arranged below the vertical falling film high-efficiency condenser, a filler heat exchange layer is arranged between the water collecting disc and the vertical falling film heat exchanger, the filler heat exchange layer is filled in the upper space of the water collecting disc, and a high-efficiency dehydrator is further arranged above the filler heat exchange layer and is arranged on one side close to the fan. The evaporative condenser can solve the problem of low heat exchange efficiency of the evaporative condenser in the prior art.

Description

Evaporation type condenser

Technical Field

The utility model relates to the field of cooling equipment, in particular to an evaporative condenser.

Background

The closed cooling tower is a high-efficiency cooling device, mainly uses the evaporation latent heat of water to take away the heat of process fluid (usually circulating water or refrigerant), completes the cooling of the process fluid, realizes the recycling of spray water, uses the evaporation cooling technology, does not generate phase change of the process fluid in a pipe, and uses the evaporation condensing technology in an evaporation condenser, and generates phase change of the process fluid in the pipe. For evaporative condensers, the process fluid flows inside the coil, conducting heat out of the tube through the tube wall, and the process fluid condenses from a gaseous state to a liquid state. 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 evaporative condenser can ensure that working media in the pipe are not polluted, so that the efficient operation of main equipment is well protected, and the service life is prolonged.

The tubular evaporative cooling coil and the filler heat exchange layer are used as core components of the evaporative condenser, and the performance of the tubular evaporative cooling coil and the filler heat exchange layer directly influence the cooling effect of the evaporative condenser. The existing evaporative condenser mostly adopts a horizontal coil type heat exchanger as heat exchange equipment, the coil mostly adopts smooth metal round tubes, the heat exchange efficiency is relatively low, the material consumption is more, the manufacturing cost is high, and the factors limit the use and popularization of the evaporative condenser to a certain extent.

In the horizontal coil evaporative condenser, spray water collides with a smooth circular tube for heat exchange, when the spray water flow is large, coils are easy to resonate, and collision noise is large; in addition, the spray water flows from top to bottom, the cooling water in the pipe flows horizontally, the spray water and the cooling water flow in a staggered way, and the logarithmic average temperature difference is smaller than that of pure countercurrent; in addition, because the coil pipes are mostly arranged in a regular triangle fork row mode, the air flow sectional area is smaller, the resistance is larger, scale is easy to form on the windward side, and the heat exchange effect and the service life are affected.

The evaporative condenser is widely applied to cooling systems in the fields of refrigeration, electric power, chemical industry, food industry and the like, and is used as important equipment of the system, and the scheme selection directly influences the overall performance and energy consumption of the system. Energy saving and high efficiency are increasingly important to the requirements of small size, light weight, large capacity and high efficiency of evaporative condensers.

Therefore, research on an evaporative condenser is needed to solve the problem of low heat exchange efficiency of the evaporative condenser in the prior art.

Disclosure of Invention

Aiming at the problem of low heat exchange efficiency of an evaporative condenser in the prior art, the utility model provides the evaporative condenser.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an evaporative condenser comprises a box body, wherein a vertical falling film efficient condenser, a spraying system and a water collecting tray are arranged in the box body; the vertical falling film high-efficiency condenser is arranged on the upper portion of the box body, the spraying system comprises a spraying device, the spraying device is arranged above the vertical falling film high-efficiency condenser, the water collecting disc is arranged below the vertical falling film high-efficiency condenser, a filler heat exchange layer is arranged between the water collecting disc and the vertical falling film high-efficiency condenser, the filler heat exchange layer is filled in the upper space of the water collecting disc, a high-efficiency dehydrator is further arranged above the filler heat exchange layer, and the high-efficiency dehydrator is arranged on one side close to the fan.

The evaporative condenser as described above, further, the vertical falling film high efficiency condenser comprises a first inlet header, a first outlet header and a plurality of vertical condensing heat exchanger fins vertically disposed between the first inlet header and the first outlet header; the vertical condensation heat exchange tube sheet comprises a second inlet header, a second outlet header and vertical condensation heat exchange tubes, and the vertical condensation heat exchange tubes are vertically arranged between the second inlet header and the second outlet header; the second inlet headers are horizontally connected with the first inlet header, and the second outlet headers are horizontally connected with the first outlet header.

The evaporative condenser further comprises a water receiving disc arranged below the vertical falling film efficient condenser, and the water receiving disc is horizontally arranged between the vertical falling film efficient condenser and the filler heat exchange layer.

The evaporative condenser is characterized in that the vertical condensing heat exchange tube is in the shape of a smooth round tube, a low-rib tube, an elliptic tube and a twisted tube.

The evaporative condenser is characterized in that the vertical condensation heat exchange tube is a twisted tube, the cross section of the twisted tube is elliptical, and when the center distance between two adjacent twisted tubes is equal to the outer long axis distance of the twisted tube, a plurality of contact points exist between the adjacent twisted tubes.

The evaporative condenser as described above, further wherein the first inlet header is disposed in an upper portion of the vertical falling film efficient condenser and the first outlet header is disposed in a lower portion of the vertical falling film efficient condenser.

The evaporative condenser as described above, further, said first inlet header and said first outlet header are both disposed in an upper portion of said vertical falling film high efficiency condenser.

The evaporative condenser further comprises two adjacent vertical condensing heat exchange fins, wherein the distance between the two adjacent vertical condensing heat exchange fins ranges from 5 mm to 100mm.

The evaporative condenser is characterized in that the spray system further comprises a spray water pump, an inlet of the spray water pump is connected with the water collecting disc through a pipeline, an outlet of the spray water pump is connected with the spray device through a pipeline, a one-way valve is arranged on the pipeline, and the direction of the one-way valve is consistent with the direction of the spray water pump.

The evaporative condenser, further, the efficient dehydrator adopts 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 evaporative condenser provided by the embodiment of the utility model, the filler heat exchange layer is arranged and fills the space above the water collecting disc, 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 evaporative condenser can be improved.

2. According to the evaporative condenser provided by the embodiment of the utility model, the high-efficiency dehydrator is arranged, so that moisture in the air passing through the high-efficiency dehydrator can be removed, the air discharged from the condenser is drier, and the loss of process fluid or spray water in the condenser can be reduced.

3. The vertical condensation heat exchange tube sheet is vertically arranged between the first inlet header and the first outlet header, at the moment, the flowing direction of spray water is consistent with that of air, and a spray water film flows along the axial direction of the vertical condensation heat exchange tube sheet; in addition, because the flow direction of the spray water film is consistent with that of the circulating air, the flow speed of the water film is accelerated by virtue of the driving of the circulating air, and a turbulent flow state is formed on the surface of the vertical condensation heat exchange tube sheet more easily, so that the boundary layer of the spray water on the surface of the vertical condensation heat exchange tube sheet is thinner, the heat exchange effect of the spray water and the cooling medium in the tube is better, the use amount of the spray water can be saved, the power of the spray water pump can be reduced, the whole economy and the heat exchange effect of the evaporative condenser are better, and the volume, the weight and the consumable of the heat exchanger are saved.

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 diagram of an evaporative condenser according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a first structure of a vertical falling film high efficiency condenser according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a second construction of a vertical falling film high efficiency condenser according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of a third structure of a vertical falling film efficient condenser according to an embodiment of the present utility model.

Wherein: 1. vertical falling film high-efficiency condenser; 2. a blower; 3. a spray water pump; 4. a filler heat exchange layer; 5. a spraying system; 6. a water collecting tray; 7. an efficient dehydrator; 8. a water receiving tray; 11. vertical condensing heat exchange tube sheets; 12. a first inlet header; 13. a first outlet header; 14. a second inlet header; 15. a second outlet header.

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, the utility model provides an evaporative condenser, which comprises a box body, wherein a vertical falling film efficient condenser 1, a spraying system 5 and a water collecting disc 6 are arranged in the box body; the vertical falling film high-efficiency condenser 1 is arranged on the upper portion of the box body, the spraying system 5 comprises a spraying device, the spraying device is arranged above the vertical falling film high-efficiency condenser 1, the water collecting disc 6 is arranged below the vertical falling film high-efficiency condenser 1, a filler heat exchange layer 4 is arranged between the water collecting disc 6 and the vertical falling film high-efficiency condenser, the filler heat exchange layer 4 is filled in the space above the water collecting disc 6, a high-efficiency dehydrator 7 is further arranged above the filler heat exchange layer 4, and the high-efficiency dehydrator 7 is arranged on one side close to the fan 2.

Specifically, when in use, the cooling water is uniformly sprayed on the surface of the vertical falling film high-efficiency condenser 1 through the spraying device in the spraying system 5, the heat of the process fluid in the pipe is absorbed to raise the temperature, and the temperature of the process fluid in the pipe is reduced and is changed from a gas state to a liquid state. The left and right sides of the filler heat exchange layer 4 are provided with air inlet grids, spray water flowing out of the heat exchanger exchanges heat with air introduced from the air inlet grids on the surface of the filler heat exchange layer 4, part of water vapor is taken away by the air, the temperature of the spray water is reduced, and finally the spray water returns to the water collecting disc 6. While droplets entrained in the air are blocked from returning to the water collection tray 6 by the high efficiency water trap 7.

In this embodiment, the shower water forms a descending water film flowing from top to bottom on the outer surface of the vertical falling film high-efficiency condenser 1, and the condensation effect is more obvious and efficient through the heat-moisture exchange between the descending water film and the process fluid in the vertical falling film high-efficiency condenser 1. Meanwhile, the space above the water collecting disc 6 is filled with the filler heat exchange layer 4, so that the contact surface area of water and air can be increased, the contact time of the water and the air can be prolonged, and spray water which exchanges heat with fluid in the vertical falling film high-efficiency condenser 1 and heats up can be further cooled, and the heat exchange efficiency of the condenser can be further improved. In addition, by arranging the efficient dehydrator 7 on the side close to the fan 2, moisture in the air passing through the efficient dehydrator 7 can be removed, so that the air discharged from the condenser is drier, and the loss of process fluid or spray water in the condenser can be reduced.

In this embodiment, the filler heat exchange layer 4 may be any of PVC filler, metal filler or porous ceramic filler. The efficient dehydrator 7 can adopt any one of PVC filler, metal filler or porous ceramic filler.

Referring to fig. 2-3, in certain embodiments, the vertical falling film high efficiency condenser 1 comprises a first inlet header 12, a first outlet header 13, and a plurality of vertical condensing heat exchanger tubes 11, the plurality of vertical condensing heat exchanger tubes 11 being vertically disposed between the first inlet header 12 and the first outlet header 13; the vertical condensation heat exchange tube sheet 11 comprises a second inlet header 14, a second outlet header 15 and vertical condensation heat exchange tubes, wherein the vertical condensation heat exchange tubes are vertically arranged between the second inlet header 14 and the second outlet header 15; a plurality of the second inlet headers 14 are each horizontally connected to the first inlet header 12, and a plurality of the second outlet headers 15 are each horizontally connected to the first outlet header 13.

Specifically, the vertical falling film high-efficiency condenser 1 mainly comprises a first inlet header 12, a first outlet header 13 and a plurality of vertical condensation heat exchange tube sheets 11 between the first inlet header and the first outlet header, wherein an inlet and an outlet of the vertical condensation heat exchange tube sheets 11 are connected with the first inlet header and the first outlet header 13 in a welding mode, and the vertical condensation heat exchange tube sheets 11 are composed of a plurality of vertical condensation heat exchange tubes through a second inlet header 14 and a second outlet header 15. In this embodiment, the plurality of vertical condensation heat exchange tubes 11 are arranged in parallel, the number of the vertical condensation heat exchange tubes 11 can be reasonably designed according to the heat exchange amount of the evaporative condenser, the distance between two adjacent vertical condensation heat exchange tubes is the same, the distance is designed according to the air flow rate, and the distance between two adjacent vertical condensation heat exchange tubes 11 is 5-100 mm. 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.

In addition, in this embodiment, since the vertical condensation heat exchange tube sheet 11 is vertically disposed between the first inlet header 12 and the first outlet header 13, at this time, the flow direction of the spray water is identical to the flow direction of the air, the spray water film flows along the axial direction of the vertical condensation heat exchange tube sheet 11, and since the air and the spray water flow through the vertical condensation heat exchange tube sheet 11 in the same direction, the water can well cover the surface of the vertical condensation heat exchange tube sheet 11 by means of wind force, ensuring that the surface of the vertical condensation heat exchange tube sheet 11 is completely wet, and such co-current flow can reduce the possibility of forming dry spots and scale on the windward side of the heat exchange tube due to the reverse direction of the wind water; in addition, because the spraying water film is consistent with the flowing direction of the circulating air, the flowing speed of the water film is accelerated by virtue of the driving of the circulating air, and a turbulent flow state is formed on the surface of the vertical condensation heat exchange tube sheet 11 more easily, so that the boundary layer of the spraying water on the surface of the vertical condensation heat exchange tube sheet 11 is thinner, the heat exchange effect of the spraying water and the cooling medium in the tube is better, the using amount of the spraying water can be saved, the power of the spraying water pump 3 can be reduced, the whole economy of the evaporative condenser is better, the heat exchange effect is better, and the volume, the weight and the consumable of the heat exchanger are saved.

In this embodiment, the vertical condensation heat exchange tube is in the shape of a smooth round tube, a low rib tube, an elliptical tube, and a twisted tube.

In an embodiment, the vertical condensation heat exchange tube is in a shape of a smooth round tube, and the vertical falling film high-efficiency condenser 1 in the embodiment of the utility model is shown in fig. 2. Wherein the first inlet header 12 is disposed at an upper portion of the vertical falling film high efficiency condenser 1, and the first outlet header 13 is disposed at a lower portion of the vertical falling film high efficiency condenser 1. In this embodiment, the vertical condensation heat exchange tubes are smooth round tubes, and a certain gap is formed between adjacent vertical condensation heat exchange tubes in the same vertical condensation heat exchange tube sheet 11, and the adjacent vertical condensation heat exchange tubes are not contacted with each other. The flow direction of spray water outside the vertical condensation heat exchange tube is consistent with the flow direction of air, and the spray water film flows along the axial direction of the vertical condensation heat exchange tube, because the air and the spray water flow through the heat exchange tube in the same direction, the water can well cover the surface of the heat exchange tube by means of wind force, the surface of the heat exchange tube is ensured to be completely wet, and 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 water is reduced by the same direction of flow; in addition, the flow direction of the spray water film is consistent with that of the circulating air, the flow speed of the water film is accelerated by virtue of the driving of the circulating air, and a turbulent flow state is formed on the surface of the heat exchange tube more easily, so that the boundary layer of the spray water on the surface of the heat exchange tube is thinner, the heat exchange effect of the spray water and the cooling medium in the tube is better, the use amount of the spray water can be saved, the power of the spray water pump 3 can be reduced, the whole economy of the evaporative condenser is better, the heat exchange effect is better, and the volume, the weight and the consumable of the heat exchanger are saved.

In another embodiment, the vertical condensation heat exchange tube is in the shape of a twisted tube, and the vertical falling film high efficiency condenser 1 in the embodiment of the present utility model is shown in fig. 3. Wherein the first inlet header 12 is disposed at an upper portion of the vertical falling film high efficiency condenser 1, and the first outlet header 13 is disposed at a lower portion of the vertical falling film high efficiency condenser 1. In this embodiment, since the cross section of the twisted tube is elliptical, when the center distance between the adjacent twisted tubes is equal to the long axis outside the twisted tubes, a plurality of contact points exist between the adjacent twisted tubes, and the contact points play a role of supporting each other, so that resonance of the heat exchange tube caused by the skip of spray water and high-speed air flow can be effectively prevented, the flow rate of air outside the tube can be improved, and the effect of enhancing the heat transfer performance of the air side outside the tube is realized. In addition, the twisted pipe can also increase the flowing distance of water flow forming a water film on the outer surface of the vertical condensation heat exchange pipe, thereby prolonging the flowing time of the water film and improving the heat exchange efficiency of the evaporative condenser.

In yet another embodiment, as shown in fig. 4, the vertical condensing heat exchange tubes are in the shape of twisted tubes, and the first inlet header 12 and the first outlet header 13 are both disposed at the upper portion of the vertical falling film high efficiency condenser 1. Specifically, the process fluid enters the vertical condensation heat exchange tube at the first inlet header 12 and then flows out from the first outlet header 13, that is, the process that the process fluid enters the upper part of the vertical condensation heat exchange tube and flows downwards along the axial direction of the vertical condensation heat exchange tube, and reaches the lower part of the vertical condensation heat exchange tube is the first flowing process. Since the first outlet header 13 is also in the upper part of the vertical falling film high efficiency condenser 1, the process when the process fluid flows from the lower part of the vertical condensation heat exchange tubes into the first outlet header 13 is the second flow process. The embodiment is suitable for the situation that the flow number in the vertical condensation heat exchange tube is greater than two, the vertical condensation heat exchange tube is a vertical coil, the vertical condensation heat exchange tube flows out from the first outlet header 13 after passing through a plurality of flowing processes, and the flowing time of process fluid in the vertical condensation heat exchange tube can be prolonged through the plurality of flowing processes, so that a better heat exchange effect is realized, and meanwhile, the problem that the vertical falling film high-efficiency condenser 1 in the prior art is limited in field due to large volume can be solved.

Referring again to fig. 1, in certain embodiments, a water tray 8 is further disposed below the vertical falling film high efficiency condenser 1, the water tray 8 being horizontally disposed between the vertical falling film high efficiency condenser 1 and the packed heat exchange layer 4. Specifically, through setting up water collector 8 in the below of vertical falling film high-efficient condenser 1, can collect the shower water that vertical falling film high-efficient condenser 1 dripped, then shower water evenly drips the surface of below packing heat exchange layer 4 again to more be favorable to process fluid and air to carry out abundant heat exchange, and then can improve the heat exchange efficiency of condenser.

Further, the spraying system 5 further comprises a spraying water pump 3, an inlet of the spraying water pump 3 is connected with the water collecting disc 6 through a pipeline, an outlet of the spraying water pump 3 is connected with the spraying device through a pipeline, a one-way valve is arranged on the pipeline, and the direction of the one-way valve is consistent with the direction of the spraying water pump 3. Specifically, through setting up spray water pump 3 can be with the shower water that drips back into in the water-collecting tray 6, pumps to spray set again and sprays, can carry out cyclic utilization to the shower water, practice thrift the cost. In addition, through setting up the check valve, can guarantee the rivers direction under the effect of spray water pump 3, the water in the pipeline can not flow backwards in the water-collecting tray 6 to the stability of condenser performance has been guaranteed.

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

1. The evaporative condenser is characterized by comprising a box body, wherein a vertical falling film high-efficiency condenser, a spraying system and a water collecting tray are arranged in the box body; the vertical falling film high-efficiency condenser is arranged on the upper portion of the box body, the spraying system comprises a spraying device, the spraying device is arranged above the vertical falling film high-efficiency condenser, the water collecting disc is arranged below the vertical falling film high-efficiency condenser, a filler heat exchange layer is arranged between the water collecting disc and the vertical falling film high-efficiency condenser, the filler heat exchange layer is filled in the upper space of the water collecting disc, a high-efficiency dehydrator is further arranged above the filler heat exchange layer, and the high-efficiency dehydrator is arranged on one side close to the fan.

2. The evaporative condenser of claim 1, wherein the vertical falling film high efficiency condenser comprises a first inlet header, a first outlet header, and a plurality of vertical condensing heat exchanger fins vertically disposed between the first inlet header and the first outlet header; the vertical condensation heat exchange tube sheet comprises a second inlet header, a second outlet header and vertical condensation heat exchange tubes, and the vertical condensation heat exchange tubes are vertically arranged between the second inlet header and the second outlet header; the second inlet headers are horizontally connected with the first inlet header, and the second outlet headers are horizontally connected with the first outlet header.

3. The evaporative condenser of claim 1, further comprising a water pan disposed below the vertical falling film high efficiency condenser, the water pan being horizontally disposed between the vertical falling film high efficiency condenser and the packed heat exchange layer.

4. An evaporative condenser as claimed in claim 2, wherein the vertical condensing heat exchange tubes are in the form of smooth round tubes, low ribbed tubes, oval tubes, twisted tubes.

5. The evaporative condenser as recited in claim 2, wherein the vertical condensing heat exchange tube is a twisted tube, the cross section of the twisted tube is elliptical, and 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.

6. The evaporative condenser of claim 2, wherein the first inlet header is disposed in an upper portion of the vertical falling film efficient condenser and the first outlet header is disposed in a lower portion of the vertical falling film efficient condenser.

7. The evaporative condenser of claim 2, wherein the first inlet header and the first outlet header are both disposed in an upper portion of the vertical falling film high efficiency condenser.

8. An evaporative condenser according to claim 2, wherein the spacing between adjacent ones of the vertical condensing heat exchanger fins is in the range of 5 to 100mm.

9. The evaporative condenser according to claim 1, wherein the spray system further comprises a spray water pump, an inlet of the spray water pump is connected with the water collecting tray through a pipeline, an outlet of the spray water pump is connected with the spray device through a pipeline, and a one-way valve is arranged on the pipeline, and the direction of the one-way valve is consistent with that of the spray water pump.

10. The evaporative condenser of claim 1, wherein the high efficiency water trap is any one of PVC packing, metal packing or porous ceramic packing; the filler heat exchange layer adopts any one of PVC filler, metal filler or porous ceramic filler.