JPH10160389A - Cooling tower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the construction cost of a cooling tower and to downsize it. SOLUTION: In a cooling tower of which spray nozzles 6 being opened to the lower surface of a hot water tank 5 spray hot water 7 on fillers 12 direct under the hot water tank 5 and the dripping hot water on the surface of the filler 12 is cooled by contacting outside air 8 directly, the fillers 12 are classified to a normally wet region 17 and a wet and dry switching region 18 separating the flowing space 16 of the outer air 8, the spray nozzles 6 being connected to the wet and dry switching region 18 are partitioned by partition boards 23 inside the hot water tank 5 and the hot water 7 is distributed adequately to the partitioned regions 24 being partitioned by the partition boards 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cooling water tower.

[0002]

2. Description of the Related Art FIG. 6 shows an example of a conventional cooling water tower. The cooling water tower includes an exhaust port 3 having a blower 2 provided at the top of a casing 1, and an outside air formed on the outer periphery of the casing 1. An intake port 4, a hot water tank 5 provided around the exhaust port 3 in the upper part of the casing 1, and hot water 7 disposed below the hot water tank 5 and flowing down from a sprinkling port 6 on the lower surface of the hot water tank 5. The heat exchanger 9 includes a heat exchange unit 9 for exchanging heat with the outside air 8 taken in from the outside air intake 4 by the blower 2 to cool the heat. The heat exchange unit 9 includes a finned tube 10 provided immediately below the hot water tank 5. The outside air 8 is provided by arranging a plurality of dry air heating units 11 and a plurality of heat exchange surface members which are arranged below the dry air heating units 11 and have, for example, a sheet-like synthetic resin material having irregularities on the surface thereof. And the filling material 12 which secures the circulation space of It is configured Ri.

[0003] In the drawing, reference numeral 13 denotes a bottom water tank for collecting water after cooling.

In such a cooling water tower, the hot water 7 of the hot water tank 5 is caused to flow down from the sprinkling port 6 through the inside of the finned tube 10 of the dry air heating section 11 and then down along the filler 12 thereunder. At the same time, the hot water 7 is cooled by sucking the outside air 8 from the outside air inlet 4 by the blower 2 and circulating the dry air heating unit 11 and the filler 12 in the horizontal direction.

At this time, the hot water 7 flowing down along the filler 12 is effectively cooled by directly exchanging heat with the outside air 8, while the filler 12 performs heat exchange with the hot water 7. The outside air 8 is heated to a temperature of about 1
Since the humid air 14 becomes 00% humid air 14, if the humid air 14 is directly discharged to the outside of the cooling water tower, white smoke may be generated when the outside air temperature is low.

[0006] The generation of such white smoke gives misunderstanding to neighboring residents and the like as if they are polluting the outside air.
In addition, there is a problem that white smoke falls on the ground and rises in the surroundings like fog, thereby causing poor visibility. For example, there is an increasing demand for minimizing the generation of white smoke.

For this reason, in the example shown in the drawing, when the hot water 7 flows down through the finned tube 10 of the dry air heating section 11, the outside air 8 flowing along the outer periphery of the finned tube 10 is heated in a dry manner. Thereby, the dry air 15 having extremely low humidity is obtained, and the dry air 15 is mixed with the humid air 14 by the blower 2 to reduce the humidity of the air discharged from the exhaust port 3 so as to prevent the generation of white smoke. -ing

[0008]

However, in the conventional cooling water tower as described above, in order to produce dry air 15 for preventing the generation of white smoke, a dedicated dry air heating section 11 using a finned tube is provided. Because it is provided, the structure becomes complicated and the construction cost rises, and the heat exchange efficiency cannot be increased because of indirect heat exchange by the finned tube, so a large capacity is required. There is a problem that the structure of the dry air heating unit 11 becomes large, the height of the cooling water tower increases, and the entire cooling water tower becomes large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to eliminate the need for a dedicated dry air heating unit using a finned tube, thereby reducing the construction cost and size of a cooling water tower. And

[0010]

According to the present invention, hot water is sprinkled from a plurality of water spouts opened on the lower surface of a hot water tank to a filler immediately below the hot water tank, and outside air is directly supplied to the hot water flowing down the surface of the filler. A cooling water tower that cools hot water by contacting, and divides a filler into a constant wet region and a wet / dry switching region that isolate the outside air flow space from each other, and the wet / dry switching region is a constant wet region. A sprinkler port communicating with the wet / dry switching area is separately partitioned by a partition plate in the hot water tank so that water can be separately sprayed, and hot water is appropriately distributed to the partition area partitioned by the partition plate. It is assumed that.

When there is no fear of generating white smoke (when the outside air temperature is high), hot water is also distributed to the partition region partitioned by the partition plate. Watering is performed in both of the dry switching areas, and the direct cooling of the warm water by the outside air is effectively performed in the entire area of the filler.

On the other hand, when there is a risk of generating white smoke (when the outside air temperature is low), if the supply of hot water to the partition area partitioned by the partition plate is stopped, the constant wet area where hot water is sprayed is stopped. Direct cooling of warm water by outside air at the same time and dry heating of outside air flowing through a wet / dry switching area where hot water is not sprayed are simultaneously performed, and dry air generated by dry heating is added to wet air generated by the direct cooling. Mixing prevents the generation of white smoke.

In this way, a part of the filler is wet-processed.
Since it is used as a dry switching area, it is possible to eliminate the need for a dedicated dry air heating unit using a finned tube.

Further, in the present invention, when distributing the hot water to the partitioned area partitioned by the partition plate, all the water spouts communicating with the wet / dry switching area are opened in the common partitioned area, and the hot water tank is opened. It is possible to adopt a configuration in which a communication port that can be opened and closed is provided at an appropriate position of the partition plate so that hot water supplied to the water storage area other than the division area can be appropriately introduced into the division area. For example, it is possible to easily switch the cooling method of the hot water in the wet / dry switching area simply by opening and closing the communication port.

Further, the partition area may be divided into a plurality of sections by a weir plate, and the weir plate may be provided with a communication port which can be opened and closed. In this case, hot water and outside air are filled in the filler. It is possible to change the ratio of the region where heat exchange is performed in a wet manner and the region where heat exchange is performed in a dry manner in a stepwise manner.

Further, it is also possible to divide the water spout communicating with the wet / dry switching area into a plurality of divided areas and to open them. In such a case, the sprinkling port is provided in a water storage area other than the divided area in the hot water tank. It is preferable that the branch pipe is branched from a hot water supply pipe for supplying hot water and connected to each of the divided areas, and the distribution of the hot water from the hot water supply pipe to the branch pipe is appropriately cut off. With this configuration, it is possible to easily switch the cooling method of the hot water in the wet / dry switching region simply by flowing or shutting off the hot water from the hot water supply pipe to the branch pipe.

Further, it is preferable that the branch pipe for distributing the hot water to each of the divided areas is divided into a plurality of systems, and that the distribution of the hot water can be appropriately cut off for each system. In the material, it is possible to gradually change the ratio of a region where hot water and outside air exchange heat in a wet manner and a region where heat exchange is performed in a dry manner.

Further, in the present invention, the filler is arranged in multiple stages in the vertical direction, and the constantly wet region and the wet / dry switching region of the filler in each stage are divided so as to correspond to each other in position and vertically. An intermediate hot water tank is provided so that the upper and lower wet / dry switching areas are always separated from the wet area between the fillers to be arranged and are continuous with each other, and the lower filler is always wet-type on the lower surface of the intermediate hot water tank. It is also possible to adopt a configuration in which an intermediate water spout is opened so that water can be sprinkled separately into the area and the wet / dry switching area.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an embodiment of the present invention, in which the same reference numerals as in FIG. 6 denote the same parts.

In the present embodiment, a dedicated dry air heating section using a finned tube is not required, and the heat exchange section disposed below the hot water tank 5 is replaced with a filler 12 (multi-stage) arranged vertically. (See FIG. 3).

The upper and lower fillers 12 form a flow space 16 for the outside air 8 extending in the vertical direction by arranging a large number of heat exchange surface materials having irregularities on the surface of a sheet-like synthetic resin material in parallel. It has a structure that secures
The wet space 17 is separated into a constant wet region 17 and a wet / dry switching region 18 which isolate the circulation space 16, and the constant wet region 17 and the wet / dry switching region 18 of the filler 12 in each stage are mutually reciprocated. It is divided according to the position.

The intermediate hot water tank 1 is disposed between the upper and lower fillers 12 so that the upper and lower wet / dry switching areas 18 are always separated from the wet area 17 and continuous.
9 is provided on the lower surface of the intermediate hot water tank 19. An intermediate water spout 20 is opened on the lower surface of the intermediate hot water tank 19 so that water can be separately sprinkled into the constantly wet area 17 and the wet / dry switching area 18 of the lower filler 12. I have.

That is, in separating the wet region 17 and the wet / dry switching region 18 of the filler 12 at each stage, the upper end of the filler 12 forming the wet / dry switching region 18 is disposed above each of them. The separating plate 21 extending to the lower surface of the hot water tank 5 or the intermediate hot water tank 19 and extending downward from the lower surface of the hot water tank 5 or the intermediate hot water tank 19 prevents the inflow of the hot water 7 from the adjacent constantly wet area 17. An intermediate water spout 20 opened in the wet / dry switching area 18 of the intermediate hot water tank 19 is adjacent to the intermediate water spout 20 by a separating plate 22 standing in the flow space 16 so as to sandwich the intermediate water spout 20. The intrusion of the warm water 7 from the wet area 17 is always prevented.

On the other hand, in the hot water tank 5, the wet / dry switching area 18 of the filler 12 disposed immediately below the hot water tank 5 is connected to the wet / dry switching area 18 so that the wet / dry switching area 18 can always be sprayed separately from the wet area 17. The water port 6 is partitioned by a partition plate 23, and particularly in this embodiment, all the water spouts 6 communicating with the wet / dry switching area 18 are partitioned into a comb-like shape by the partition plate 23, and partitioned by the partition plate 23. Divided area 24,
It is divided into two areas: a water storage area 25 other than the division area 24 in the hot water tank 5.

Further, at an appropriate position of the partition plate 23, the hot water 7 supplied to the water storage area 25 through the hot water supply pipe 28 is provided.
A communication port 27 provided with a valve 26 that can be opened and closed so as to be able to appropriately distribute the air to the partitioned area 24 is provided.

In the figure, reference numeral 29 denotes a hot water tank 5 and an intermediate hot water tank 1.
9 is a watering nozzle attached to the watering port 6 and the intermediate watering port 20 which are opened on the lower surface of the nozzle 9. If such a watering nozzle 29 is provided at the watering port 6 and the intermediate watering port 20, the hot water 7 can be filled with the filler 12 However, it is also possible to omit it by adjusting the distance between the fillers 12 and the number and arrangement of the water spouts 6 and the intermediate water spouts 20 and the diameter.

When there is no risk of generating white smoke (when the outside air temperature is high), the valve 26 of the communication port 27 is opened, and the hot water 7 is also supplied to the partitioned area 24 partitioned by the partition plate 23. When distributing, the water is sprayed to both the wet area 17 and the wet / dry switching area 18 in the filler 12 so that the filler 1
In the entire region 2, the direct cooling of the hot water 7 by the outside air 8 is effectively performed.

On the other hand, when there is a possibility that white smoke is generated in winter or the like (when the outside air temperature is low), the valve 26 of the communication port 27 is closed and the hot water 7 is supplied to the partitioned area 24 partitioned by the partition plate 23. When the supply of water is stopped, direct cooling of the hot water 7 by the outside air 8 in the constantly wet area 17 where the hot water 7 is sprayed, and dry heating of the outside air 8 flowing through the wet / dry switching area 18 where the hot water 7 is not sprayed. Are performed at the same time, and the dry air generated by the dry heating is mixed with the moist air generated by the direct cooling to prevent the generation of white smoke.

Therefore, according to the above-described cooling water tower of the present embodiment, a part of the filler 12 is used as the wet / dry switching area 18, thereby eliminating the need for a dedicated dry air heating unit using a finned tube. In addition, since the inside of the hot water tank 5 is partitioned by the partition plate 23, the hot water tank 5 can be implemented with the same height dimension as before without complicating the structure, and therefore, the construction cost of the cooling water tower is reduced. Reduction and size reduction can be achieved.

As shown in this embodiment, when the hot water 7 is distributed to the partitioned area 24 defined by the partition plate 23, the water spout 6 communicating with the wet / dry switching area 18 is connected to the common partitioned area. 24, a communication port which can be opened and closed at an appropriate position of the partition plate 23 so that the hot water 7 supplied to the water storage area 25 other than the division area 24 in the hot water tank 5 can be appropriately introduced into the division area 24. If the configuration provided with 27 is adopted, the cooling method of the hot water 7 in the wet / dry switching area 18 can be easily switched simply by opening and closing the communication port 27, and the hot water 7 distributed to the partitioned area 24 can be easily changed. Since the water level naturally becomes the same as the water storage area 25 side, it is not necessary to individually adjust the water level in the water storage area 25 and the division area 24, and the configuration of the control system becomes simple and the operation becomes easy.

As shown by a two-dot chain line in FIG.
The common partitioned area 24 that opens all the water spouts 6 communicating with the wet / dry switching area 18 is divided into a plurality (two in the illustrated example) by the weir plate 30 and can be opened and closed by the weir plate 30. A communication port 32 provided with a valve 31 may be provided. In this case, in each of the fillers 12 at each stage, the hot water 7 and the outside air 8 are subjected to wet heat exchange with the dry heat exchange. The ratio between the hot water 7 and the outside air 8 can be finely adjusted in accordance with the outside air temperature so that the heat exchange between the hot water 7 and the outside air 8 is performed as much as possible according to the outside air temperature, thereby increasing the cooling efficiency.

FIGS. 4 and 5 show another embodiment of the present invention. The sprinkling port 6 communicating with the wet / dry switching area 18 is divided into a plurality of partitioned areas 24 and opened. A branch pipe 33 is branched from a hot water supply pipe 28 that supplies hot water 7 to a water storage area 25 other than the partition area 24 and connected to each of the partition areas 24, and hot water is supplied from the hot water supply pipe 28 to the branch pipe 33. A configuration is adopted in which a valve 34 is provided at the base end of the branch pipe 33 with respect to the hot water supply pipe 28 so that the distribution of 7 can be appropriately shut off.

In this way, by opening and closing the valve 34, the hot water 7 in the wet / dry switching area 18 can be easily formed simply by flowing or shutting off the hot water 7 from the hot water supply pipe 28 to the branch pipe 33. The cooling method can be switched, and according to such an embodiment, the construction cost of the cooling tower can be reduced and the size can be reduced as in the case of the above embodiment.

As shown in the present embodiment, the branch pipe 33 for distributing the hot water 7 to each of the divided areas 24 is divided into a plurality of systems (two systems in the illustrated example), and the hot water 7 is supplied to each system. Valves 35 and 36 may be provided so that the distribution can be appropriately shut off. In this case, the heat exchange between the hot water 7 and the outside air 8 in the filler 12 in the wet manner and the dry heat exchange in the filler 12 are performed. Since the ratio with the region to be changed can be changed stepwise, the cooling efficiency can be increased by finely adjusting the heat exchange between the hot water 7 and the outside air 8 as much as possible according to the outside air temperature.

It should be noted that the cooling water tower of the present invention is not limited to the above-described embodiment, and that the filler may be constituted by a single stage. Of course, various changes can be made.

[0037]

According to the cooling water tower of the present invention described above, various excellent effects as described below can be obtained.

(I) According to the first to sixth aspects of the present invention, by using a part of the filler as a wet / dry switching area, a dedicated dry air heating section using a finned tube becomes unnecessary. In addition, it is possible to implement the hot water tank at the same height as the conventional one without complicating the special structure simply by partitioning the inside of the hot water tank with the partition plate. The size can be reduced.

(II) According to the second and fourth aspects of the present invention, the cooling method of the hot water in the wet / dry switching area can be switched by a simple operation.

(III) According to the second aspect of the invention, since the warm water distributed to the partitioned area naturally has the same water level as the storage area side, it is necessary to adjust the water level separately in the water storage area and the partitioned area. As a result, the configuration of the control system becomes simpler and the operation becomes easier.

(IV) According to the third and fifth aspects of the present invention, the ratio of the region where the hot water and the outside air are heat-exchanged in the filler and the region where the heat exchange is performed in the dry system in the filler is stepwise. Since the temperature can be changed, the cooling efficiency can be increased by finely adjusting the heat exchange between the hot water and the outside air in a wet manner as much as possible according to the outside air temperature.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an example of an embodiment of the present invention.

FIG. 2 is a plan view of the hot water tank of FIG.

FIG. 3 is an enlarged front sectional view showing a main part of the hot water tank of FIG. 1;

FIG. 4 is a plan view showing another embodiment of the present invention.

FIG. 5 is a view in the direction of arrows VV in FIG. 4;

FIG. 6 is a schematic diagram showing a conventional example.

[Explanation of symbols]

 Reference Signs List 5 Hot water tank 6 Sprinkling port 7 Hot water 8 Outside air 12 Filler 16 Distribution space 17 Constant wet area 18 Wet / dry switching area 19 Intermediate hot water tank 20 Intermediate sprinkling port 23 Partition plate 24 Sectional area 25 Water storage area 27 Communication port 28 Hot water supply pipe 30 Weir plate 32 Communication port 33 Branch pipe

Claims (6)

[Claims] 1. Cold water for cooling hot water by spraying hot water from a plurality of water outlets opened on the lower surface of the hot water tank to the filler immediately below the hot water tank, and directly contacting outside air with the hot water flowing down the surface of the filler. A tower, in which the packing material is divided into a constantly wet region and a wet / dry switching region in which the outside air flow space is isolated from each other, and the wet / dry switching region is sprayed separately from the wet / dry switching region so as to be able to spray water separately from the constantly wet region. A cooling water tower, wherein a water spout communicating with the switching area is partitioned by a partition plate in a hot water tank, and hot water is appropriately distributed to the partitioned area partitioned by the partition plate. 2. A sprinkling port communicating with the wet / dry switching area can be opened in a common partitioned area, and hot water supplied to a water storage area other than the partitioned area in the hot water tank can be appropriately introduced into the partitioned area. The cooling water tower according to claim 1, wherein a communication port that can be opened and closed is provided at an appropriate position of the partition plate. 3. The cooling water tower according to claim 2, wherein the partitioned area is divided into a plurality of sections by a weir plate, and the weir plate is provided with a communication port that can be opened and closed. 4. A spout port communicating with the wet / dry switching area is divided into a plurality of partitioned areas and opened, and a branch pipe is branched from a hot water supply pipe for supplying hot water to a water storage area other than the partitioned areas in the hot water tank. 2. The cooling water tower according to claim 1, wherein the cooling water tower is connected to each of the divided areas so as to be able to appropriately block distribution of the hot water from the hot water supply pipe to the branch pipe. 5. The branch according to claim 4, wherein the branch pipe for distributing the hot water to each of the divided areas is divided into a plurality of systems, and the distribution of the hot water can be appropriately cut off for each system. Cold water tower. 6. Fillers are arranged in multiple stages in the vertical direction, and a constantly wet region and a wet / dry switching region of the filler in each stage are divided in correspondence with each other, and the fillers are arranged vertically. An intermediate hot water tank is provided so that the upper and lower wet / dry switching areas are continuously separated from the wet area at all times, and the lower wet water area and the wet / dry type of the filler are provided on the lower surface of the intermediate hot water tank. An intermediate water spout is opened so that water can be sprinkled separately to the switching area.
The cooling water tower according to 3, 4, or 5.