JP3201650B2 - cooling tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling tower provided with a freezing / refrigeration showcase, an air conditioner, etc., for supplying water sent from the condenser again as low-temperature cooling water to the condenser. Things.

[0002]

2. Description of the Related Art For example, water used for cooling a product manufactured by a die-casting method gradually increases its temperature by cooling a large amount of cast product.
For this purpose, the hot water at about 80 ° C. must be replaced or cooled. Replacement drains hot water, which is uneconomical. Therefore, it is necessary to regenerate the used water as low-temperature cooling water and use it in circulation.

[0003] As described above, there is a cooling tower as a device for cooling water. The cooling tower, also called a cooling tower, is a device for cooling water by constantly contacting it with air so that the water can be recycled. In principle, the water to be cooled is brought into direct contact with a large amount of air around it to partially evaporate the water to be cooled, and at the same time, removes the heat required for evaporation from the remaining water to be cooled. The temperature of the water drops and is cooled.

A typical example of a conventional cooling tower will be described with reference to FIG. The cooling tower is of a type in which air is blown upward from the lower part toward the water to be cooled dropped from the upper part to make countercurrent contact.

In the cooling tower, a fan 52 for forcibly ventilating air upward from a lower portion of the cooling tower main body 50, a driving motor 54 for driving the fan 52 to rotate, and water to be cooled are provided at an upper portion. An input pipe 56 fed by a water pump 55, a water receiving pipe 58 for receiving the water to be cooled from the input pipe 56, and a water spray pipe 60 for spraying the water to be cooled into the water receiving pipe 58 are provided.

At the center of the cooling tower main body 50, the free fall of water in the cooling tower main body 50 is prevented, the contact time between the water to be cooled and the air is extended, and the contact area between the water to be cooled and the air is increased. And a filler 62 for increasing the cooling effect is provided.

Further, a water tank 64 for storing the cooled water and an output pipe 66 for sending the cooled water are provided below the cooling tower body 50, respectively.

In the cooling tower having such a configuration, the cooling water that has entered the water receiving cylinder 58 from the input pipe 56 by the water pump 55 is sprayed on the packing 62 by the sprinkling pipe 60, and the cooling effect is enhanced by the packing 62. The cooling water is stored in a water tank 64, and the cooling water in the water tank 64 is guided to the outside of the cooling tower by an output pipe 66.

When the water to be cooled is spilled on the packing 62 by the sprinkling pipe 60, the fan 52 on the upper part of the cooling tower main body 50 forcibly ventilates the air flowing from the air inlet 68 to the air outlet 70. The water to be cooled comes into contact with a large amount of air while dripping along the filling 62. As a result, the cooling water is cooled because a part of the cooling water evaporates and the heat of evaporation is removed from the remaining cooling water.

[0010]

In the above-mentioned conventional cooling tower, a packing is provided in the cooling tower body to increase the contact area between the water to be cooled and the air. Since the cooling effect increases as the contact area with water increases,
In order to further increase the cooling effect, it is necessary to increase the volume of the packing. For this reason, the cooling tower body also becomes large.

Further, in order to bring the water to be cooled into contact with the surrounding air, it is necessary to provide a drive device for the fan for forcing the air flowing from the lower part of the cooling tower main body to the upper part of the cooling tower main body.

As described above, since the conventional cooling tower is large in view of the structure, the maintenance is complicated and the manufacturing cost is high. Furthermore, the supply of power to the fan drive is always required during the cooling operation.

The present invention has been made in view of the above points,
It is an object of the present invention to provide a cooling tower that facilitates maintenance of the cooling tower, reduces the size of the cooling tower, reduces the manufacturing cost, and significantly reduces the running cost.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a cooling tower of the present invention has the following features.
Plates or the horizontal direction of the cylindrical cooling tower body having an open upper and lower end have a compartmentalized room in a plurality of stages by a partition made of perforated plate, provided on the upper end opening of the water tank, b) the cooling tower body a rotating shaft extending through the center of the vertical direction, the bearing
Supported rotatably provided, c) a nozzle for injecting the cooling water is provided at the top of the room of the cooling tower body by, d)
The water wheel, which is cooled by receiving the water to be cooled injected from the nozzle by a plurality of impellers, is integrally rotated near the upper end of the rotating shaft.
Capable provided, e) the room other than the top of the room, before
The water to be cooled dropped from each opening or a number of small holes is agitated and emptied from the upper or lower opening of the cooling tower body.
Intake air and send the air downward or upward
A plurality of stirring blades is inclined toward it to the rotating shaft
It is configured to be integrally rotatable .

[0015]

According to the cooling tower of the present invention having the above-described structure, the water turbine is provided by utilizing the impingement force of the water to be cooled which is jetted from the nozzle provided in the uppermost room in the cooling tower body. In order to rotate the water turbine, the agitating blades provided in the room other than the uppermost room interlocked with the water turbine rotate integrally with the water turbine, and forcibly agitate the water to be cooled to form a spray state. In addition, these impellers separate air by rotation.
Upwards through the central opening or numerous small holes in the
Since the cooling tower is inclined in the downward feeding direction, air is taken in from the upper end opening or the lower end opening of the cooling tower main body , and the sprayed water to be cooled comes into contact with the air.

As described above, the turbine is rotated by using the injection energy of the water to be cooled from the nozzle, and simultaneously, the stirring blade is rotated to forcibly agitate the water to be cooled to form a spray state.
Further, by bringing this into contact with the introduced air, the water to be cooled is cooled by the heat of evaporation of the water to be cooled.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the cooling tower of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the appearance and a partial internal structure of a cooling tower according to this embodiment. FIG. 2 is a longitudinal sectional view of FIG.

[0019] In Figure, the cooling tower 2 is constituted by a water tank 6 for storing the cooling tower body 4 and the cooling water for cooling the cooled water, and respectively a cylindrical structure, cooling
The upper and lower ends of the tower body 4 are opened, and the upper end of the water tank 6 is opened.
It is provided in .

Inside the cooling tower body 4, partitions 8a, 8b, 8 having openings 7a, 7b, 7c of the same circular shape at the center are provided.
c are attached at regular intervals in the horizontal direction.

As a result, the cooling tower main body 4 is located above the cooling tower main body 4 above the partition wall 8a, the cooling water introduction chamber A, and the partition walls 8a and 8b.
b and the room surrounded by the outer periphery of the cooling tower body 4 are the primary cooling chamber B, and similarly, the room surrounded by the partitions 8b and 8c and the outer periphery of the cooling tower body 4 are the secondary cooling chamber C. 8
The cooling water output chamber D is formed below the cooling tower main body 4 from c.

At the center of each of the cooling water introduction chamber A, the primary cooling chamber B, the secondary cooling chamber C, and the cooling water output chamber D formed as described above , each opening 7a of each room is provided. ・ 7b
-A rotating shaft 10 is provided which penetrates 7c vertically . The rotating shaft 10 is provided with bearings 1 at both ends of the cooling tower body 4.
It is supported by 2a and 12b. Further, the bearing 12a
12b is a cross-shaped supporting member 14a
-It is supported by 14b, and is fixed to the center of both ends of the cooling tower main body 4, respectively.

In the cooling water introduction chamber A, a distribution pipe 18 branched in two directions by a pipe joint 16 to introduce cooling water.
Is provided. At the tip of the distribution pipe 18, nozzles 20 for injecting cooling water are attached. Further, there is provided a water wheel 22 having a plurality of impellers 23 which receive cooling water injected from the nozzle 20 and are forced to rotate by the reaction force.

The plurality of撹<br/>拌翼24a in the center portion of the primary cooling chamber B is also double in the center of the secondary cooling chamber C
Several stirring blades 24b are provided, respectively. The stirring blade 24a · 24b are seen write from the top of the air inlet 25 of the cooling tower body 4 sucks air, which wings is inclined to pump down.

The water turbine 22 in the cooling water introduction chamber A, the stirring blades 24a in the primary cooling chamber B, and the stirring blades 24b in the secondary cooling chamber C rotate on the rotating shaft 1 so as to rotate integrally with the rotating shaft 10.
0.

An attachment 26 is fixed to the lower part of the cooling tower body 4 and is joined to an attachment 28 fixed to the water tank 6 by a bolt and a nut 30 to connect the cooling tower body 4 to the water tank 6. ing.

At the lower part of the side surface of the water tank 6, a water supply pipe 32 for supplying stored cooling water is provided. Outside the cooling tower main body 4, there are provided a recovery water pipe 34 to which the water to be cooled is supplied, a pump 36 for pumping the water to be cooled to the cooling tower main body 4, and an input pipe 38. The input pipe 38 is connected to the pipe joint 16 in the cooling water introduction chamber A.

Next, the mode of use of the cooling tower of the embodiment having the above-described configuration will be described. In FIG. 1 and FIG. 2, the water to be cooled, which is sent by the recovery water pipe 34, is pumped up by the pump 36 to the water to be cooled introduction chamber A at the upper part of the cooling tower main body 4, and passes through the input pipe 38 to the cooling tower main body 4 enter.
The water to be cooled is branched in two directions via the pipe joint 16 and enters the distribution pipe 18, and is jetted to the water wheel 22 from two nozzles 20 at the tip of the distribution pipe 18.

The water to be cooled, which has been pumped up and injected, hits the impeller 23 of the water wheel 22 and rotates the water wheel 22 in the direction E around the rotary shaft 10 by the collision force due to the injection.

Since the water wheel 22 is fixed to the rotating shaft 10, the water wheel 22 rotates and the stirring blades 24a provided in the primary cooling chamber B and the stirring blades 2 provided in the secondary cooling chamber C.
4b interlocks and rotates in the same direction at the same speed as the water wheel 22.

As described above, the cooling water that has entered the cooling water introduction chamber A drops into the primary cooling chamber B from the opening 7a of the partition wall 8a while being injected into the impeller 23 by the nozzle 20.

The water to be cooled, which has flowed into the primary cooling chamber B, is stirred by the stirring blades 24a and is forcibly sprayed. At this time, since the downward blowing wind works by the rotation of the stirring blades 24a whose blades are inclined so as to suck the air into the cooling chamber B, the air is sucked from the air inlet 25 at the upper part of the cooling tower main body 4, and the opening is opened. Since the water to be cooled, which is sent downward from 7a, comes into contact with the air, and a part of the water is evaporated to be cooled by the heat of evaporation.

The water to be cooled thus cooled is supplied to the stirring blade 2
Due to the centrifugal force caused by the rotation of 4a, the stirring blade 24a is once radially flowed in the circumferential direction at the tip of the stirring blade 24a, and then drops from the opening 7b of the partition 8b into the next secondary cooling chamber C. Thereby, the first stage of the cooling operation of the water to be cooled ends. Similarly, the water to be cooled that has flowed into the secondary cooling chamber C is again stirred by the stirring blades 24 b rotating together with the water wheel 22, and becomes a finer spray state. At this time, similarly to the cooling operation of the primary cooling chamber B, a downward wind force is generated in the cooling chamber C by rotation of the stirring blade 24b whose blades are inclined so as to suck air.
Since the air is sucked in from the air inlet 25 at the upper part of the cooling tower body 4 and sent out downward from the openings 7a and 7b, the water to be cooled in the spray state comes into contact with the air, and a part of the water evaporates to evaporate. Cooled by heat. This allows
The second stage of the cooling operation of the water to be cooled ends.

The water to be cooled cooled as described above flows into the cooling water output chamber D from the opening 7c of the partition 8c as water droplets. Further, the water is dropped into a water tank 6 connected to the cooling tower body 4 and accumulates as cooling water. In addition, the stirring blades 24a and 24b
The air sucked from the air inlet 25 in the upper part of the cooling tower main body 4 by the rotation of the
The air is discharged to the outside from the air outlet 27 at the connection between the cooling tower main body 4 and the water tank 6 through the rooms A to D by a to 7c.
Thereby, the cooling operation of the water to be cooled in the main cooling tower 2 is completed.

The reason why the cooling chamber is divided into a plurality of stages by the partition walls is to prevent the free fall of the inflowing water to be cooled and to prolong the time for which the air stays.

It should be noted that the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention.

For example, in the embodiment, the partition walls 8a to 8c in the cooling tower main body 4 are flat plates having the same circular openings 7a to 7c at the center, but this is a porous plate provided with a plurality of small holes. The air and the water to be cooled from outside may be sent downward.

In order to bring the water to be cooled into a spray state into contact with air from outside, air is taken in from the air inlet 25 at the upper part of the cooling tower body 4, but air is taken in from the lower part of the cooling tower body 4. You may do so. However, the direct contact of agitating the water to be cooled with the stirring blade and sucking air from the upper part, contacting with the water to be cooled and letting it fall naturally takes more time to the stirring blade than the method of sucking air from the lower part and making a countercurrent contact. Since the load is small, the above embodiment is superior in power consumption.

The cooling chamber has two chambers, a primary cooling chamber B and a secondary cooling chamber C. If a plurality of cooling chambers are provided in addition to this,
The cooling operation of the water to be cooled is performed stepwise, and the water to be cooled is in a finer spray state, the contact time with the air is lengthened, and the cooling effect can be improved.

The number and shape of the impellers 23 in the hot water introduction chamber A may be configured to efficiently receive the water to be cooled injected from the nozzles. The number and shape of the blades of the stirring blades 24a of the primary cooling chamber B and the stirring blades 24b of the secondary cooling chamber C stir the water to be cooled efficiently into a spray state,
In addition, the configuration may be such that air outside the cooling tower main body 4 can be efficiently introduced.

[0041]

As is apparent from the above description, the cooling tower of the present invention has the following effects.

The cooling operation of the cooling water can be performed by utilizing the collision energy of the cooling water injected from the nozzles with the impeller. Therefore, there is no need for a drive device for a fan that forcibly ventilates air as in a conventional cooling tower, and power saving can be achieved.

Furthermore, since the air taken in by the stirring blades is brought into contact with the water to be cooled, there is no need for a packing for increasing the contact area with air as in a conventional cooling tower. In addition, power for actively atomizing the water to be cooled is also provided by a common power source (energy of collision of the water to be cooled with the impeller), so that the apparatus can be simplified. For this,
The cooling tower body can be reduced in size, the structure is simple, maintenance is easy, the manufacturing cost can be reduced, and the running cost can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an external appearance and a partial internal structure of a cooling tower according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a sectional view showing an example of a conventional general cooling tower.

[Explanation of symbols]

 Reference Signs List 4 Cooling tower body 6 Water tank 8a, 8b, 8c Partition wall 10 Rotary shaft 12a, 12b Bearing 20 Nozzle 22 Turbine 24a, 24b Stirring blade A Cooling water introduction chamber B Primary cooling chamber C Secondary cooling chamber D Cooling water output chamber

Continuation of the front page (72) Inventor Masaru Asai 11-9 Minami Futami, Futami-cho, Akashi-shi, Hyogo Limited company Uemura Works Futami Plant (58) Fields investigated (Int. Cl. ⁷ , DB name) F28F 25/06 F28F 25/08 F28F 25/00 F28C 1/00

Claims (1)

(57) [Claims] 1. A plate or a perforated plate having an opening in the center
A horizontal cylindrical cooling tower body having an open upper and lower end have a compartmentalized room in a plurality of stages by a partition consisting of the water tank
A rotating shaft that is provided on the upper end opening of the cooling tower and vertically penetrates the center of the cooling tower body .
A nozzle is provided rotatably supported by a bearing , and a nozzle for injecting water to be cooled is provided in the uppermost room of the cooling tower main body. The water to be cooled ejected from the nozzle is received by a plurality of impellers and rotated. The water wheel rotates integrally near the upper end of the rotating shaft
In each of the rooms other than the uppermost room, each of the openings or
The water to be cooled dropped from many small holes is stirred and air is taken in from the upper end opening or lower end opening of the cooling tower main body.
A compound that is inclined in a direction to send air downward or upward
Several sheets of the stirring blades, rotatable integrally to each of the rotary shaft
A cooling tower, which is provided .