Defogging and water-saving modified cooling tower

Abstract

A fog-dispersal water-saving modified cooling tower relates to the technical field of cooling towers and comprises a tower body, and a water collecting device, a water distribution system and fog-dispersal water-saving filler are arranged in the tower body from top to bottom. The fog-dispersal water-saving packing is formed by bonding a plurality of dry packing sheets, a plurality of first heat exchange channels and second heat exchange channels which are independent from each other are formed through areas among the packing sheets, and the upper end of each fog-dispersal water-saving packing is vertically and fixedly connected with an upper partition plate which separates the first heat exchange channel from the second heat exchange channel. And the lower end part of each fog-dispersal water-saving filler is vertically and fixedly connected with a lower partition plate, and is divided into a plurality of first inlet channels communicated with the second heat exchange channel and a plurality of second inlet channels communicated with the first heat exchange channel through the lower partition plates. The utility model solves the problems of high energy consumption, scaling, frost crack risk and high reconstruction cost of the fog-dispersal water-saving reconstruction cooling tower in the traditional technology.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooling towers, in particular to a fog-reducing and water-saving modified cooling tower. BACKGROUND

[0002] The function of a cooling tower is to exchange heat between circulating water carrying residual heat and air in the tower, transfer the heat of the water to the air and dissipate into the atmosphere, and to cool the circulating water. In use, the circulating water is pumped to a water distributor and sprayed on the filler, and under the action of the cooling wind at the bottom or side, the circulating water falls into the water collecting pool after heat exchange. During the heat exchange between the circulating water and the air, phase change occurs, a large amount of saturated water vapor is generated, and escapes out of the tower along with the airflow generated by the fan. When the ambient temperature is low, the saturated water vapor encounters the external cold air and is easy to produce a large amount of white fog, which on the one hand affects the surrounding environment, causes traffic hazards, and causes corrosion of equipment in the plant area; on the other hand, it causes a large amount of water resource waste and leads to an increase in operating cost.

[0003] In recent years, with the gradual strengthening of energy saving and emission reduction and the improvement of environmental protection requirements, cooling tower fog reduction and water saving is becoming more and more important. At present, there are a large number of conventional cooling towers on the market. In order to carry out fog reduction and water saving modification, most of the existing market uses external fin fog reduction and water saving modification.

[0004] A patent with publication number CN217083475U is disclosed in the prior art, which includes a first section, a second section and a third section; the third section is a bendable structure connected between the first section and the second section; the first section, the second section and the third section are an integrated structure; at least one of the first section and the second section is provided with a support positioning structure, and the support positioning structure supports between the overlapping surfaces of the first section and the second section after the third section is bent, so that there is a gap between the overlapping surfaces. The middle of the single-piece filler provided by the utility model is provided with an integrated bendable section. The single-piece filler is folded into a group when in use, the bendable section serves as a water spraying end, the water spraying end has no joint and no risk of opening glue, and the risk of water leakage of the sprayed water to the air passage can be completely eliminated to ensure complete isolation of water and air.

[0005] The existing technology including the above patent gradually exposes deficiencies with use, mainly in the following aspects:

[0006] First, the resistance along the way is large, which significantly increases the water pump head and energy consumption, and increases the operating cost.

[0007] Second, the water quality requirement is high, and the inside of the finned tube will scale after a long time of operation, which reduces the heat exchange effect and affects the cooling.

[0008] Third, the fog reduction effect is poor in cold seasons and regions, and there is a risk of frost cracking.

[0009] Fourth, the transformation cost is high and the recycling effect is poor.

[0010] In summary, the existing technology has obvious inconveniences and defects in actual use, so it is necessary to improve it. Summary of the Invention

[0011] In view of the defects in the prior art, the present invention provides a fog-eliminating and water-saving cooling tower modification to solve the problems of high energy consumption, scaling, freezing cracking risks, and high modification costs of fog-eliminating and water-saving cooling tower modification in traditional technologies.

[0012] To achieve the above object, the present invention provides the following technical solutions:

[0013] The defogging and water-saving cooling tower comprises a tower body, wherein the tower body is provided with a water collecting device, a water distribution system and defogging and water-saving fillers from top to bottom;

[0014] The fog-eliminating and water-saving filler is formed by bonding a plurality of dry filler sheets, and a plurality of mutually independent first heat exchange channels and second heat exchange channels are formed through the areas between the filler sheets.

[0015] The upper end of each of the fog-eliminating and water-saving fillers is vertically fixed with an upper partition that separates the first heat exchange channel from the second heat exchange channel.

[0016] The lower end of each of the fog-eliminating and water-saving fillers is vertically fixed with a lower partition, and is divided into a plurality of first inlet channels connected to the second heat exchange channel and a second inlet channel connected to the first heat exchange channel by the lower partition.

[0017] As an optimized solution, the water distribution system includes several first water distribution systems located sequentially above the first heat exchange channel, and a second water distribution system located above the second heat exchange channel. The first water distribution system and the second water distribution system are opened or closed independently.

[0018] As an optimized solution, a damper for opening and closing each of the first heat exchange channels is provided above the channel.

[0019] As an optimized solution, a shutter is provided on the side wall of the tower body corresponding to each of the second entrance channels, and the inlet end of the shutter is connected to the outside.

[0020] As an optimized solution, when the temperature is hot in summer, there is no fog and there is no need to turn on the defog mode. Instead, the first water distribution system and the second water distribution system are turned on.

[0021] As an optimized solution, when the temperature drops and fog needs to be eliminated, the second water distribution system is closed and the first water distribution system is opened.

[0022] As an optimized solution, when the temperature is hot in summer, there is no fog and there is no need to turn on the defogging mode. Instead, the first water distribution system and the second water distribution system are turned on, and the damper is turned on.

[0023] As an optimized solution, in seasons with lower temperatures, when defogging is required, the second water distribution system is closed, the first water distribution system is opened, and the damper is closed.

[0024] As an optimized solution, when the temperature is hot in summer, there is no fog and there is no need to turn on the defogging mode. Instead, the first water distribution system and the second water distribution system are turned on, the damper is turned on, and the blinds are turned on.

[0025] As an optimized solution, in seasons with lower temperatures, when defogging is required, the second water distribution system is closed, the first water distribution system is opened, the damper is closed, and the shutters are closed.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] In the defogging mode of the present invention, in seasons or regions with lower temperatures, hot water and cold air are respectively transferred through different independent channels of the defogging filler to perform a wall-to-wall heat exchange, thereby reducing water evaporation heat exchange or achieving zero water evaporation, thereby achieving the purpose of defogging and water saving.

[0028] It can achieve zero fog elimination in extremely cold areas and eliminate the problems of the original fog elimination and water-saving technology, such as difficulty in fog elimination in extremely cold weather, high energy consumption, scaling, freezing cracking risks, and high transformation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0030] Figure 1 This is a schematic structural diagram of embodiment 1 of the present invention;

[0031] Figure 2 This is a structural diagram of embodiment 2 of the present invention;

[0032] Figure 3 This is a structural diagram of embodiment 3 of the present invention.

[0033] In the figure: 1-fan system, 2-water collection device, 3-water distribution system, 3.1-first water distribution system, 3.2-second water distribution system, 4-upper partition, 5-fog-eliminating and water-saving filler, 5.1-first heat exchange channel, 5.2-second heat exchange channel; 5.3 first entry channel, 5.4-second entry channel, 6-lower partition, 7-air door, 8-louver. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0035] Example 1:

[0036] like Figure 1 As shown, the fog-eliminating and water-saving cooling tower comprises a tower body, wherein the tower body is provided with a water collecting device 2, a water distribution system 3 and fog-eliminating and water-saving fillers 5 from top to bottom;

[0037] The fog-eliminating and water-saving filler 5 is formed by bonding a number of dry filler sheets, and a number of independent first heat exchange channels 5.1 and second heat exchange channels 5.2 are formed through the areas between the filler sheets.

[0038] The upper end of each of the fog-eliminating and water-saving fillers 5 is vertically fixed with an upper partition 4 that separates the first heat exchange channel 5.1 from the second heat exchange channel 5.2.

[0039] The lower end of each of the mist-eliminating and water-saving fillers 5 is vertically fixed with a lower partition 6, and is divided into a plurality of first inlet channels 5.3 connected to the second heat exchange channel 5.2 and a second inlet channel 5.4 connected to the first heat exchange channel 5.1 by the lower partition 6.

[0040] A fan system 1 is installed at the top outlet of the tower. Inside the tower, a water distribution system 3 is housed. This system comprises a first water distribution system 3.1 and a second water distribution system 3.2, each independently of the other. A water collection device 2 is located above the water distribution system 3, while an upper baffle 4 and defogging and water-saving packing 5 are located below the water distribution system 3. The defogging and water-saving packing 5 is composed of several bonded packing sheets. The interior of the defogging and water-saving packing 5 assembly is divided into several independent first heat exchange channels 5.1 and second heat exchange channels 5.2.

[0041] In the hot summer, when there is no fog, there is no need to activate the defogging mode. To meet the cooling requirements, the first water distribution system 3.1 and the second water distribution system 3.2 are simultaneously activated. At this time, circulating hot water is evenly sprayed onto the defogging and water-saving filler 5 through the water distribution system 3. At this time, hot water flows from top to bottom on both sides of the first inlet channel 5.3 and the second inlet channel 5.4 of the defogging and water-saving filler 5, forming a layer of water film. Under the action of the fan system 1, dry cold air flows from bottom to top into each of the first inlet channel 5.3 and the second inlet channel 5.4, passing over the water film. At this time, the hot water and the dry cold air contact and exchange heat in each channel, which is equivalent to the use of conventional filler, giving full play to the cooling performance and meeting the cooling requirements.

[0042] In the season of lower temperature, when defogging is needed, the second water distribution system 3.2 is closed and the first water distribution system 3.1 is opened. At this time, the circulating hot water of the first water distribution system 3.1 is evenly sprayed in the first heat exchange channel 5.1 of the defogging water-saving filler 5, and through the action of the upper partition 4, no hot water flows into the second heat exchange channel 5.2. Since hot water flows into the first inlet channel 5.3 of the defogging water-saving filler 5, the resistance is greater than that of the second inlet channel 5.4. Therefore, most of the dry cold air flows into the first inlet channel 5.3 of the air inlet shown in the figure under the action of the fan system 1, and flows into the independent channel 5 of the defogging water-saving filler 5. After achieving inter-wall heat exchange, the hot water flows out from above the second inlet channel 5.4. During this process, the hot water temperature drops, and the dry cold air becomes dry hot air. A small portion of the dry cold air flows from the second inlet channel 5.4 at the illustrated air inlet, passes through the independent channel of the defogging and water-saving packing 5, and undergoes contact heat exchange before flowing out from above the second inlet channel 5.4. During this process, the hot water temperature drops, and the dry cold air becomes saturated moist hot air. It then meets the dry hot air discharged from the second inlet channel 5.4 above the defogging and water-saving packing 5, mixing to form unsaturated steam before being discharged from the tower. This unsaturated steam does not generate plume. This embodiment can be used in southern China or other areas where plume elimination is simple and cooling is required.

[0043] Example 2:

[0044] like Figure 2 As shown, the tower comprises a tower body, with a fan system 1 provided at the top outlet. A water distribution system 3 is provided within the tower body. The water distribution system 3 comprises a first water distribution system 3.1 and a second water distribution system 3.2, which are independent of each other. A water collection device 2 is arranged above the water distribution system 3, and a damper 7 is added above the water collection device 2. An upper partition 4 and defogging and water-saving packing 5 are arranged below the water distribution system 3. The defogging and water-saving packing 5 is composed of several adhesively bonded packing sheets. The interior of the defogging and water-saving packing 5 assembly block is divided into several independent first heat exchange channels 5.1 and second heat exchange channels 5.2.

[0045] In the hot summer, when there is no fog, there is no need to turn on the defogging mode. To meet the cooling demand, the first water distribution system 3.1 and the second water distribution system 3.2 are turned on at the same time, and the damper 7 is also turned on. At this time, the circulating hot water is evenly sprayed on the defogging and water-saving filler 5 through the water distribution system 3. At this time, hot water flows from top to bottom on both sides of the first inlet channel 5.3 and the second inlet channel 5.4 of the defogging and water-saving filler 5, and forms a layer of water film. Under the action of the fan system 1, the dry cold air flows from bottom to top into each first inlet channel 5.3 and the second inlet channel 5.4, passing over the water film. At this time, the hot water and the dry cold air are in contact and heat exchange in each channel, which is equivalent to the use of conventional fillers, giving full play to the cooling performance and meeting the cooling requirements.

[0046] In the season of temperature reduction, when the need to dissipate fog, close the second water distribution system 3.2, open the first water distribution system 3.1, and close the air door 7 at the same time. At this time, the circulating hot water first water distribution system 3.1 is evenly sprayed in the first heat exchange channel 5.1 of the fog dissipating water saving filler 5, and the second heat exchange channel 5.2 has no hot water flowing in due to the effect of the upper baffle 4. Since the air door 7 is closed, all dry cold air flows into the first inlet channel 5.3 from the air inlet and flows out from the second inlet channel 5.4 under the action of the fan system 1, and exchanges heat with the hot water in the first inlet channel 5.3, so that the temperature of the hot water is reduced, and the dry hot air is discharged from the top of the fog dissipating water saving filler 5 and further discharged outside the tower. At this time, the unsaturated dry hot steam will not produce a mist. The air door 7 can also be partially closed according to the actual temperature reduction and fog dissipating water saving demand to achieve less fog and temperature reduction at the same time. This embodiment can be used in the season of severe cold in the north or northwest region, and the condition of fog dissipating is relatively harsh. The performance of fog dissipating and water saving is met, and the effect of temperature reduction is achieved through dry cooling.

[0047] Embodiment three,

[0048] As shown in Figure 3 , the present application designs a fog dissipating and water saving modified cooling tower, which comprises a tower body, a fan system 1 is arranged at the top outlet of the tower body, a water distribution system 3 is arranged in the tower body, and the water distribution system 3 comprises a first water distribution system 3.1 and a second water distribution system 3.2 which are independent of each other. A water collecting device 2 is arranged above the water distribution system 3. An upper baffle 4 and a fog dissipating and water saving filler 5 are arranged below the water distribution system 3. The fog dissipating and water saving filler 5 is formed by bonding a plurality of filler pieces, and the inside of the fog dissipating and water saving filler 5 assembly block is divided into a plurality of first heat exchange channels 5.1 and second heat exchange channels 5.2 which are independent of each other. A plurality of groups of louver structures 8 are arranged at the air inlet below the fog dissipating and water saving filler 5.

[0049] In the summer season, when the temperature is relatively high, there is no fog, and the fog dissipating mode does not need to be started. In order to meet the demand of temperature reduction, the first water distribution system 3.1 and the second water distribution system 3.2 are started at the same time, and the louver 8 is also in the open state. At this time, the circulating hot water is evenly sprayed on the fog dissipating and water saving filler 5 through the water distribution system 3. At this time, the first inlet channel 5.3 and the second inlet channel 5.4 on both sides of the fog dissipating and water saving filler 5 have hot water flowing from top to bottom and forming a layer of water film. Dry cold air flows into each first inlet channel 5.3 and second inlet channel 5.4 from bottom to top under the action of the fan system 1, and flows over the water film. At this time, the hot water and the dry cold air contact and exchange heat in each channel, which is equivalent to the use of conventional fillers, fully plays the role of temperature reduction, and meets the requirement of temperature reduction.

[0050] During colder seasons when defogging is required, the second water distribution system 3.2 is closed, the first water distribution system 3.1 is opened, and the shutters 8 are closed. At this point, the circulating hot water from the first water distribution system 3.1 is evenly sprayed into the first heat exchange channel 5.1 of the defogging and water-saving packing 5. Through the action of the upper partition 4, no hot water flows into the second heat exchange channel 5.2. Since the shutters 8 are closed, all dry cold air, under the action of the fan system 1, flows into the first inlet channel 5.3, which has no shutters 8 at the air inlet. It undergoes a wall-to-wall heat exchange with the hot water in the first inlet channel 5.3, lowering the temperature of the hot water. After becoming dry hot air, it is discharged from above the defogging and water-saving packing 5 and further discharged out of the tower. At this point, unsaturated dry hot steam will not produce plume. The shutters 8 can be partially closed based on actual cooling and defogging and water-saving needs, achieving both reduced fog and cooling. This embodiment can also be used in northern or northwestern regions where temperatures are high and defogging conditions are more stringent, meeting defogging and water-saving performance requirements and achieving a cooling effect through dry cooling.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. Mist elimination and water saving cooling tower transformation, characterized by: It comprises a tower body, wherein a water collecting device (2), a water distribution system (3) and a fog-eliminating and water-saving filler (5) are arranged from top to bottom in the tower body; The fog-eliminating and water-saving filler (5) is formed by bonding a plurality of dry filler sheets, and a plurality of mutually independent first heat exchange channels (5.1) and second heat exchange channels (5.2) are formed through the areas between the filler sheets. The upper end of each of the fog-eliminating and water-saving fillers (5) is vertically fixedly connected to an upper partition (4) that separates the first heat exchange channel (5.1) from the second heat exchange channel (5.2). The lower end of each fog-eliminating and water-saving filler (5) is vertically fixedly connected to a lower partition (6), and is divided into a plurality of first inlet channels (5.3) connected to the second heat exchange channel (5.2) and a second inlet channel (5.4) connected to the first heat exchange channel (5.1) by the lower partition (6).

2. The cooling tower for mist elimination and water saving according to claim 1 is characterized in that: The water distribution system (3) comprises a plurality of first water distribution systems (3.1) sequentially located above the first heat exchange channel (5.1), and a second water distribution system (3.2) located above the second heat exchange channel (5.2); the first water distribution system (3.1) and the second water distribution system (3.2) are independently opened or closed.

3. The mist-eliminating and water-saving cooling tower according to claim 2 is characterized in that: A damper (7) for opening and closing the first heat exchange channel (5.1) is provided above each of the first heat exchange channels (5.1).

4. The cooling tower for mist elimination and water saving according to claim 3 is characterized in that: A shutter (8) is provided on the side wall of the tower body corresponding to each of the second inlet channels (5.4), and the inlet end of the shutter (8) is connected to the outside.

5. The mist-eliminating and water-saving cooling tower according to claim 2 is characterized in that: In summer when the temperature is relatively hot, there is no fog and there is no need to turn on the defogging mode. Instead, the first water distribution system (3.1) and the second water distribution system (3.2) are turned on.

6. The mist-eliminating and water-saving cooling tower according to claim 2 is characterized in that: In the season of lower temperature, when it is necessary to eliminate fog, the second water distribution system (3.2) is closed and the first water distribution system (3.1) is opened.

7. The cooling tower for mist elimination and water saving according to claim 3 is characterized in that: In summer when the temperature is relatively hot, there is no fog and there is no need to start the defogging mode. Instead, the first water distribution system (3.1) and the second water distribution system (3.2) are started, and the damper (7) is opened.

8. The mist-eliminating and water-saving cooling tower according to claim 3 is characterized in that: In a season with lower temperatures, when defogging is required, the second water distribution system (3.2) is closed, the first water distribution system (3.1) is opened, and the damper (7) is closed.

9. The mist-eliminating and water-saving cooling tower according to claim 4 is characterized in that: In the summer when the temperature is relatively hot, there is no fog and there is no need to start the defogging mode. Instead, the first water distribution system (3.1) and the second water distribution system (3.2) are started, the damper (7) is opened, and the shutter (8) is opened.

10. The mist-eliminating and water-saving cooling tower according to claim 4 is characterized in that: In a season with lower temperatures, when defogging is required, the second water distribution system (3.2) is closed, the first water distribution system (3.1) is opened, the damper (7) is closed, and the shutter (8) is closed.

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