JP2000193379A - Cold water tower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the building costs and size of a cold water tower that can prevent white smoke from being generated. SOLUTION: In a cold water tower, warm water 7 is sprinkled from the upper part of a filler 12, and outdoor air is directly brought into contact with the warm water 7 flowing on the surface of the filler 12 for cooling the warm water 7. In this case, the filler 12 is divided into a constantly wet region 17 and a wet/dry changeover region 18 for alternate arrangement, a warm water tank 5 where a sprinkler 6 for connecting merely to the wet/dry changeover region 18 is opened on a bottom is provided directly above the filler 12, and a sprinkling pipe 19 exclusively for the constantly wet region 17 that can be separated from the wet/dry changeover region 18 for sprinkling is provided for the constantly wet region 17 between the warm water tank 5 and the filler 12.

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 generation of white smoke, a finned tube 10 is required.
, A dedicated dry air heating unit 11 is provided, so that the structure becomes complicated and the construction cost rises.
The heat exchange efficiency cannot be increased due to the indirect heat exchange by the finned tube 10, so that a large capacity is required and the structure of the dry air heating unit 11 becomes large,
There has been a problem that the height dimension of the cooling water tower is increased and the entire cooling water tower is enlarged.

The present invention has been made in view of the above circumstances, and has as its object to reduce the construction cost and size of a cooling tower capable of preventing the generation of white smoke.

[0010]

SUMMARY OF THE INVENTION The present invention relates to a cooling water tower for spraying hot water from above a filler, and cooling the hot water flowing down the surface of the filler by directly contacting outside air with the hot water. Fillers are divided and arranged alternately in a wet area and a wet / dry switching area where the outside air flow space is isolated from each other,
A hot water tank with a sprinkler port opened to the bottom just above the filler and communicating only with the wet / dry switching area is provided.Between the hot water tank and the filler, the wet area is always different from the wet / dry switching area. A sprinkling pipe dedicated to wet areas is always provided so that water can be sprinkled.

When hot water is supplied to both the hot water tank and each of the water spray pipes when there is no fear of generating white smoke (when the outside air temperature is high), the filler is supplied from the water spout on the bottom surface of the hot water tank. Hot water is sprayed on the wet / dry switching area, and the hot water is also sprayed on the constant wet area of the filler from each water spray pipe, so that water is sprayed on both the constant wet area and the wet / dry switching area. Thus, the direct cooling of the hot water by the outside air is effectively performed in the entire region 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 the hot water to the hot water tank is shut off, the hot water generated by the outside air in the constantly wet area where the hot water is sprinkled. Direct cooling and dry heating of the outside air flowing through the wet / dry switching area where hot water is not sprayed are performed simultaneously,
Dry air generated by dry heating is mixed with humid air generated by direct cooling, thereby preventing generation of white smoke.

Further, in the present invention, it is preferable that the sprinkler pipe dedicated to the wet area at all times communicates with a common auxiliary water tank which extends in the direction in which the sprinkler pipes are arranged adjacent to the hot water tank. By doing so, the hot water once stored in the sub-water tank is distributed approximately evenly to each water sprinkling pipe by the water level head and spreads well to the back, and the water sprinkling is excellent and the uniformity of the filler is always high in the wet area. Becomes possible.

Further, in the present invention, it is preferable that the sprinkler pipe dedicated to the wet area at all times is constituted by a round pipe made of polyvinyl chloride. In this case, it is necessary to perform plating for rust prevention. With no material costs
The production cost can be greatly reduced, and if the material of the sub-water tank is made of plastic or the like, it becomes possible to connect a sprinkling pipe to the sub-water tank with an adhesive, thereby facilitating the work. Work costs can also be significantly reduced.

[0015]

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

FIGS. 1 to 5 show an embodiment of the present invention, in which the same reference numerals as in FIG. 6 denote the same parts.

As shown in FIG. 1, in this embodiment, a dedicated dry air heating unit using a finned tube is not required, and a heat exchange unit disposed below the hot water tank 5 will be described in detail below. It is composed of the filler 12.

That is, the filler 12 is provided with a plurality of heat exchange surface materials having irregularities formed on the surface of a sheet-like synthetic resin material, which are arranged in parallel to stand up. (See FIG. 2), and a continuous wet area 17 and a wet / dry switching area 18 which are separated from the outside air flow space 16 and are alternately arranged.

Here, the constant wet area 17 is formed with three rows of flow spaces 16 as one unit.
The wet / dry switching area 18 is provided with one line of the flow space 16.
Is formed as one unit, but the upper end of the filler 12 forming the wet / dry switching area 18 is extended upward so as to prevent the intrusion of the warm water 7 from the adjacent constant wet area 17. It is.

As shown in FIG. 2, the water spout 6 opened at the bottom of the hot water tank 5 is connected to only the wet / dry switching area 18 via a water sprinkling nozzle 28. A watering pipe 19 is provided between the hot water tank 5 and the filler 12 so as to be able to water the wet area 17 separately from the wet / dry switching area 18 so as to correspond to the position of the wet area 17. ing.

As shown in FIGS. 1, 3 and 4, the sprinkler pipes 19 are connected to the lower surface of the main structure 20 of the cooling water tower, which supports the hot water tank 5 by mounting it on the upper surface thereof, via a hanger 30. Each of the water pipes 29 is formed of a polyvinyl chloride round pipe mounted on the lower surface of each water pipe 19 and is provided at a plurality of water holes 29 at a plurality of locations in the longitudinal direction of the water pipe 19.
A sprinkling nozzle 31 is attached so that water can be satisfactorily diffused and sprinkled with respect to the filler 12 in the constantly wet region 17 having the water spray nozzle 6.
It is also possible to omit it by adjusting the interval between the two, the number and arrangement position of the watering holes 29, the diameter, and the like.

Further, each of the sprinkling pipes 19 communicates with a common sub-water tank 21 extending in the direction in which the sprinkling pipes 19 are arranged adjacent to the hot water tank 5. A water supply pipe 23 having a diffuser 22 extending downward along the longitudinal direction of the auxiliary water tank 21 is guided to the tip of the water supply pipe 23. The hot water 7 supplied to the water supply pipe 23 from a main pipe (not shown) is diffused by the diffuser. At 22 the internal guide vanes 22a
(See FIG. 4) to diffuse the flow and reduce the flow velocity,
The water is poured gently so that the water level does not become uneven over the longitudinal direction of the sub water tank 21 (the water surface does not undulate).

As shown in FIGS. 2 and 5, a diffusion box 25 having a large number of openings 24 formed on all sides in four directions is provided at a substantially central position in the hot water tank 5.
Is installed on the raised floor by an angle member 26 so as not to block the water spout 6 on the lower surface of the hot water tank 5, and the tip of a water supply pipe 27 branched from a main pipe (not shown) is inserted and installed on the upper surface thereof. The hot water 7 supplied from the water supply pipe 27 is temporarily stored in the diffusion box 25, so that the flow velocity is reduced, and the warm water 7 is gradually and evenly discharged from the side opening 24 to the four sides. I have.

Thus, when there is no fear of generating white smoke (when the outside air temperature is high), the hot water 7 is introduced into the diffusion box 25 through the water supply pipe 27, and is temporarily stored in the diffusion box 25. The hot water 7 is stored in the hot water tank 7, the flow velocity is reduced, and the water flows out gently and uniformly in four directions from the side opening 24, thereby supplying the hot water 7 so that an appropriate water level is maintained in the hot water tank 5. The hot water 7 introduced through the water supply pipe 23 is diffused by the diffuser 22 at the tip to reduce the flow velocity, so that the water level does not become uneven over the longitudinal direction of the auxiliary water tank 21 (the water surface does not undulate).
The hot water 7 is supplied so that the appropriate water level is maintained in the sub water tank 21, and the water level head of the hot water 7 supplies the hot water 7 from the lower part of the sub water tank 21 to each sprinkling pipe 19. When the water is uniformly distributed and supplied, the wet / dry switching area 18 of the filler 12 from the water spout 6 on the lower surface of the hot water tank 5
The hot water 7 is sprinkled on the other hand, and the hot water 7 is also sprinkled from each sprinkling pipe 19 to the constantly wet area 17 of the filler 12, so that the constantly wet area 17 and the wet / dry switching area 18 are provided.
Are sprayed on both sides, and the direct cooling of the warm water 7 by the outside air 8 is effectively performed in the entire region of the filler 12.

On the other hand, when there is a risk of generating white smoke (when the outside air temperature is low), if the supply of the hot water 7 to the hot water tank 5 is shut off, the continuous wet area 17 in which the hot water 7 is sprinkled is used. The direct cooling of the hot water 7 by the outside air 8 and the dry heating of the outside air 8 flowing through the wet / dry switching area 18 where the hot water 7 is not sprayed are simultaneously performed, and the wet air generated by the direct cooling is dried by the dry heating. The air is mixed 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 hot / water tank 5 can be separately sprinkled on the wet / dry switching area 18 without complicating the structure of the hot water tank 5, the generation of white smoke can be prevented. The construction cost and the size of the cooling tower that can be reduced can be reduced.

When the filler 12 is divided into a constant wet area 17 and a wet / dry switching area 18 and watering is performed separately, the inside of the hot water tank 5 corresponds to the constant wet area 17 and the wet / dry switching area 18. Since no means is taken for partitioning by a partition plate, a means for supplying water to a hot water tank in a conventional cooling water tower in which the entire area is always a wet area can be diverted as it is, for example, a conventionally known diffusion as shown in the figure. By using the box 25 and the like, the hot water 7 can be supplied to the hot water tank 5 extremely well without any particular difficulty.

Furthermore, avoiding arranging a dedicated water sprinkling pipe in the wet / dry switching area 18 which is normally formed with a narrower width than the wet area 17 in the conventional hot water tank 5 separately. Watering is performed, and a dedicated watering pipe 19 is arranged in the constant wet area 17 that is formed with a wider width than the wet / dry switching area 18. Therefore, the constant wet area 17 and the wet / dry switching area 18 are arranged. It is possible to greatly ease the design restrictions on the arrangement of the water spray equipment in both the dry switching area 18 and, especially, to design the sprinkler pipe 19 dedicated to the wet area 17 with a high degree of freedom in terms of its material and shape. Becomes possible.

That is, for example, when the sprinkling pipe is to be disposed in the wet / dry switching area 18 formed with a narrow width, it is necessary to suppress the flow rate of the hot water 7 and to flow it slowly so that good sprinkling can be performed. Therefore, it is necessary to construct a sprinkler pipe with a square pipe with a vertically long rectangular cross section so as to secure the widest possible cross-sectional area of the flow passage.However, such a square pipe is manufactured as a custom-made, thin-walled metal. Must be
It becomes very expensive, and it is easy to generate distortion when plating for rust prevention. Furthermore, it is necessary to make the auxiliary water tank 21 made of metal and connect it by welding. It will be.

Then, as described above, the wet area 1
If the sprinkling pipe 19 for exclusive use of 7 is constituted by a round pipe made of polyvinyl chloride, it is not necessary to apply plating for rust prevention and the material cost can be reduced, so that the production cost can be greatly reduced. Moreover, if the material of the sub-water tank 21 is made of plastic or the like, the sprinkling pipe 19 can be connected to the sub-water tank 21 with an adhesive, so that the operation becomes easy and the operation cost can be greatly reduced. is there.

A sprinkling pipe 19 dedicated to the wet area 17 at all times
Is connected to a common sub-water tank 21 extending in the direction in which the sprinkling pipes 19 are arranged adjacent to the hot water tank 5, the hot water 7 once stored in the sub-water tank 21 The head can distribute the water evenly to each sprinkling pipe 19 so that it can be spread well to the back.
It is also possible to perform good water spray with high uniformity.

The cooling water tower of the present invention is not limited to the above-described embodiment. In the illustrated example, the auxiliary water tank has a box shape. It is needless to say that a structure in which a spout is cut out may be employed, and various changes may be made without departing from the gist of the present invention.

[0033]

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 aspect of the present invention, since a part of the filler is used as a wet / dry switching area, a dedicated dry air heating section using a finned tube is not required. And watering the wet / dry switching area separately with a hot water tank,
Since the hot water tank can be implemented without complicating the structure, the construction cost and the size of the cooling tower which can prevent the generation of white smoke can be reduced.

(II) According to the first aspect of the present invention, when the filler is divided into a constantly wet region and a wet / dry switching region and watering is performed separately, the inside of the hot water tank is always in a wet region. No means has been taken to partition with a partition plate in correspondence with the wet / dry switching area, and the water supply means to the hot water tank in the conventional cooling water tower, which has always been a wet area for the entire area, can be diverted as it is For example, the hot water can be supplied to the hot water tank extremely well without any particular difficulty using a conventionally known diffusion box or the like.

(III) According to the first aspect of the present invention, a dedicated sprinkling pipe is disposed in the wet / dry switching area which is normally formed with a narrower width than the wet area. To avoid this, watering is separately performed in a conventional hot water tank, and a dedicated watering pipe is arranged in the always wet area, which is formed with a wider width than the wet / dry switching area. The design restrictions on the installation of watering equipment in both the always wet area and the wet / dry switching area can be greatly eased, and the sprinkling pipe dedicated to the always wet area has a high degree of freedom in terms of its material and shape. It becomes possible to design.

(IV) According to the second aspect of the present invention, the warm water once stored in the sub-water tank is distributed approximately evenly to each water sprinkling pipe by the head of the water level, so that the hot water can reach the back well. As a result, it is possible to perform good water spray with high uniformity in the constantly wet region of the filler.

(V) According to the third aspect of the present invention, the sprinkling pipe dedicated to the wet area is constituted by a round pipe made of polyvinyl chloride, so that plating is performed for rust prevention. Since there is no need and the material cost can be reduced, the production cost can be greatly reduced, and if the material of the sub-water tank is made of plastic or the like and the sprinkling pipe is connected to the sub-water tank with an adhesive, The work becomes easy and the work cost can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a diagram corresponding to a part I in FIG. 5 showing an example of an embodiment for carrying out the present invention.

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

3 is a view in the direction of arrows III-III in FIG. 2;

FIG. 4 is a view in the direction of arrows IV-IV in FIG. 2;

FIG. 5 is a view in the direction of arrows VV in FIG. 2;

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

[Explanation of symbols]

 5 Hot water tank 6 Water spout 7 Hot water 8 Outside air 12 Filler 16 Distribution space 17 Constant wet area 18 Wet / dry switching area 19 Sprinkler pipe 21 Secondary water tank

Claims (3)

[Claims] 1. A cooling water tower in which hot water is sprinkled from above a filler and cooled by bringing external air into direct contact with hot water flowing down the surface of the filler. A hot water tank with a sprinkling port opened at the bottom just above the filler and opened at the bottom just above the packing material, and a constant temperature wet area and a wet / dry switching area are separated and arranged alternately. A cooling water tower having a sprinkling pipe dedicated to a wet area always disposed between a water tank and a filler so that water can be sprinkled in a wet area separately from a wet / dry switching area. 2. The sprinkler pipe dedicated to the wet area at all times communicates with a common sub-tank extending in the direction in which the sprinkler pipes are arranged adjacent to the hot water tank. Water tower. 3. The cooling water tower according to claim 1, wherein the sprinkling pipe dedicated to the wet area at all times is constituted by a round pipe made of polyvinyl chloride.