JPH10220972A - Cooling tower and water collecting device for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cause a water head to be minimum, prevent noise and further not to prevent an efficient flow of sucked air in a cooling tower by a method wherein a water collecting device having an aeration characteristic is installed just below a filling material block. SOLUTION: This water collecting device is comprised of a plurality of trough members 12 arranged just below a filling material block and spaced apart from each other to enable a clearance communicated in a vertical direction to be prohibited and of a plate member 16 suspended to flow water from the trough members 12 in a downward direction. The trough members 12 are comprised of trough segments 12a arranged with a clearance S from each other and slant plates 12b extended from the lower surface of the filling material block up to the trough segments 12a and then the slant plates 12b are constructed to close the clearance S of the trough segments 12a in a vertical direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cooling tower and a water collecting device therefor. More specifically, a cooling tower for cooling hot water discharged from various types of equipment such as air conditioners in factories and buildings, and water cooled by the cooling tower is collected once without directly falling into a cooling water tank. The present invention relates to a water collecting device for feeding into a cooling water tank.

[0002]

2. Description of the Related Art Conventionally, cooling towers have been used to cool hot water discharged from air-conditioning equipment in factories, buildings, and the like, and to circulate it.

[0003] In terms of the hot water cooling system, there are a so-called "cross-flow system" in which hot water and a cooling air flow intersect, and a so-called "counter flow system" in which hot water and a cooling air flow are opposed. The present invention relates to a cooling tower of a counter flow type. Therefore, in order to facilitate understanding of the present invention, FIG. 5 shows a schematic configuration of a cooling tower 51 of a counter flow type.

In FIG. 5, hot water is cooled by a flow F of the outside air above a space (hereinafter, referred to as an air intake section 52) formed on the side of the cooling tower for taking in outside air for hot water cooling. Is provided, a plenum portion 54 is formed further above, and a cooling fan 55 is provided at the uppermost portion.

Hot water sent from a hot water supply pipe 56 through a branch pipe (hereinafter referred to as a water sprinkling pipe) 57 is sprinkled from a water sprinkling nozzle (not shown) to the filler block 53, and the hot water flows through the filler block 53. It flows down in the gap.

On the other hand, the outside air sucked by the cooling fan 55 becomes an air flow F rising from the air intake 52 in the hot water flow gap, and cools the hot water flowing down in the filler block 53.

The air that has exchanged heat with the hot water is discharged to the outside by a cooling fan 55 after water droplets are separated by an eliminator 58 laid on a sprinkling pipe 57. As described above, in the cooling tower 51 of the counterflow type, the flowing hot water is cooled by the airflow supplied from the opposite direction.

[0008] Thus, the warm water that has passed through the filler block becomes cold water and falls into the cold water tank 59 through the large space of the air intake 52 and is stored.

A louver (reference numeral 60 in FIGS. 6 and 7) is provided at a portion of the air intake section 52 where the outside air F is sucked so that falling water does not fly outside the cooling tower 51.

In such a cooling tower of the counterflow type, as described above, the air inlet 5 from the filler block 53 is provided.
2, the falling water becomes a large amount of water droplets, and generates a sound of hitting the water surface of the cold water tank 59. In a large cooling tower, the height of the air intake section 52 is increased to about 2 to 3 m so that a large amount of air is efficiently sucked in. This can contribute to noise.

As a technique for preventing the generation of the sound of falling water, for example, a sound deadening mat as disclosed in Japanese Patent Application Laid-Open No. 8-200986 is known. As shown in FIG. 6, this technique employs a noise reduction mat 7 in which a synthetic resin noise reduction mat material 71a is attached directly above the cold water tank 59.
1 is arranged so as to cover the cold water surface. And
The water droplets that fall from the filler block 53 through the air intake section 52 collide with the sound deadening mat 71, and then flow into the cold water tank 59 through a water passage 71 b provided on the lower surface of the sound deadening mat 71. 60 is a louver.

Japanese Patent Laid-Open Publication No. 5-17391 discloses a sound deadening material. As shown in FIG.
Reference numeral 2 denotes a laminate of synthetic resin nets stacked in a plurality of stages, and is also provided immediately above the cold water tank 59 so as to cover the cold water surface.

[0013]

However, in each of the prior arts described above, the height from the air intake portion, that is, the lower end of the filler block to the water surface (water drop) is 0.5 to less.
The effect can be expected to some extent if the cooling tower is about 1 m, but a sufficient noise reduction effect cannot be obtained with the above-mentioned large cooling tower having a water drop of 2 to 3 m. Also, in the case of multiple cooling towers connected in series, the area of the chilled water tank is greatly increased, so even if the chilled water head is about 0.5 to 1 m, the sound of the chilled water inevitably increases. Therefore, a sufficient silencing effect cannot be obtained. By the way, the aforementioned Japanese Utility Model Laid-Open No. 5-17391
In the experimental example in the publication, the head is set to 0.5 m.

An attempt to reduce the head of water by moving the sound deadening mat and the water passage upward, which is described in Japanese Patent Application Laid-Open No. Hei 8-200986, discloses that the sound deadening mat reduces the efficient flow of suction air. It hinders cooling performance, which is not preferable.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a water collecting device having air permeability is installed close to and directly below a filler block to minimize a head drop of water. An object of the present invention is to provide a cooling tower and a water collecting device for the cooling tower, which do not hinder the efficient flow of the suction air.

[0016]

SUMMARY OF THE INVENTION A water collecting device according to the present invention is provided with a plurality of water collecting devices arranged close to and immediately below a filler block so as to provide a gap therebetween and to close a gap communicating vertically. A gutter member is provided, and a water passage member for flowing water downward from the gutter member.

As described above, since the water collecting device of the present invention is provided near the lower end of the filler block, the sound of the cold water falling from the filler block is extremely small and does not cause noise. Further, since the gutter members are arranged with a gap therebetween, the rising cooling air flow is sucked into the upper filler block without great resistance. Therefore, the cooling effect of the hot water is not adversely affected. In addition, since the gap between the gutter members communicating with each other in the vertical direction is closed, cold water does not pass through the gap between the gutter members and fall into the chilled water tank to generate noise. Of course, there is no problem because the cold water is sent from the gutter member to the cold water tank through the water passage member. In addition, a louver conventionally provided to prevent water droplets from scattering to the outside becomes unnecessary.

In this water collecting apparatus, a plurality of the gutter members are provided in each of a plurality of vertical stages, and the gutter members in another stage are closed so as to close a gap formed by the gutter members in one stage. In the case where the member is provided, the operation and effect of the water collecting device of the present invention can be achieved with a simple configuration. Further, in the above-described configuration in which the gutter members are provided in a plurality of stages, a gutter member having a U-shaped cross section or a semicircular cross section can be employed, so that, for example, a circular cross-section pipe or a square cross-section pipe can be easily processed and manufactured. It is preferable because it can be performed.

Alternatively, the gutter member comprises a gutter portion arranged with a gap therebetween, and an inclined plate extending from the lower surface of the filler block to the gutter portion. The water collecting device, which is configured to close the vertical gap, can be formed integrally with the inclined plate and the gutter portion by extrusion molding or the like.
For example, even in the case of installation by mounting it on a support frame or the like, the mounting cost may be reduced because it may be merely mounted.

On the other hand, in the above water collecting apparatus, the water passage path member extends from the water collecting chamber to the cold water tank so as to communicate with the gutter member. In the case of a device provided with a water pipe, a cold water tank or the like having a deep water depth can be easily installed compared to the plate member. In addition, it is preferable that the lower end of the opening of the water pipe is located below the surface of the cold water tank, since almost no sound of landing of the cold water can be heard.
Further, the water collecting chamber may be a pipe-shaped or a trough having an open upper part.

[0021] Alternatively, the water collecting device may include a plate member in which the gutter member is disposed at an angle, and the water passage includes a plate member which is provided upright at a lower end of the gutter member with a slight gap therebetween. In this case, since the plate member blocks the horizontal component of the airflow from the outside of the cooling tower to the air intake, the airflow is prevented from flowing to the opposite opening of the air intake. Further, since the flowing cold water is exposed to the air intake section, the cold water is also preferably cooled there.

The cooling tower according to the present invention is a counter-flow type cooling tower in which the flow of hot water and the flow of air for cooling the hot water are opposed to each other. A water collecting device for collecting water that falls from the filler block, having air permeability, and sending the water to a cold water tank through an air intake portion located below the water collecting device. It is characterized in that the device is constituted by any one of the above-mentioned water collecting devices.

Therefore, the above-described functions and effects can be obtained.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a water collecting device of the present invention and a cooling tower of the present invention provided with the water collecting device will be described with reference to the accompanying drawings.

FIG. 1 is a schematic sectional view showing one embodiment of a cooling tower of the present invention, FIG. 2 is a partially cutaway perspective view showing one embodiment of a water collecting device of the present invention in FIG. 1, and FIG. III of 1
FIG. 4 (a), FIG. 4 (b) and FIG.
(C) is an important section sectional view showing other embodiments of a gutter member in a water collecting device of the present invention, respectively.

In FIG. 1, a cooling fan 2 is disposed at the top of a cooling tower 1 and an air intake for taking in outside air for cooling hot water by the cooling fan 2 is provided on a side of the cooling tower 1. An inlet 3 is formed below the cooling tower 1.
A filler block 4 for cooling hot water by the outside air (hereinafter, referred to as a cooling air flow F) is provided above the air intake unit 3, and further above the hot water to be cooled is supplied to the filler block 4. A hot / moisture pipe 5 for distributing is provided.

Hot water is supplied from a hot water supply pipe 6 to the hot / moisture pipe 5, and the hot water is sprayed from a water spray hole formed in the lower surface of the hot / moisture pipe 5 to a lower filler block 4 through a water spray nozzle 7. Is done. When the filler block (see FIG. 3) is of a so-called film type, it is allowed to flow down into the hot water flow gap 8. As shown in FIG. 3, the hot water flow gap 8 is a gap formed between a plurality of filling plates 9 constituting the filler block 4. Therefore, the hot water that has fallen flows down as a film mainly along the filling plate 9. Then, the cooling air flow F passes through the hot water flow gap 8 from below to above. The hot water is cooled by the cooling air flow F to become cold water C, and reaches the water collecting device 10 disposed immediately below the filler block 4. A cold water tank 11 is disposed below the water collecting device 10 with a space serving as the air intake unit 3 (see FIG. 1).

As the filler block, there is a so-called splash type in which water droplets are scattered by a large number of plate members in addition to the film type, but the present invention can be combined with any filler block.

FIG. 2 shows details of the water collecting device 10 (only the right side) of FIG. The water collecting device 10 includes a gutter member 12 which is disposed substantially in parallel with a gap therebetween. The gutter member 12 is integrally formed from a plurality of gutter portions 12a having a semicircular cross section and an inclined plate portion 12b extending obliquely upward from one end edge of each gutter portion 12a. I have. The upper edge of the inclined plate portion 12b is a filler block 4
And serves to guide the cold water C dripping from the filler block 4 to the gutter portion 12a (see FIG. 3). Note that the gutter portion 12a and the inclined plate portion 12b are separate members, and the upper edge of the inclined plate portion 12b is brought close to the lower surface of the filler block 4 as described above, and the lower edge is extended to the inside of the gutter portion 12a. It may be formed. However, as described above, the gutter portion 12a and the inclined plate portion 12b are integrally formed.
It is preferable because the forming and assembling of the gutter member are easy and the strength is excellent.

Further, each inclined plate portion 12b is formed so as to close a vertical gap S between the gutter portions 12a. That is, when this water collecting device 10 is viewed in the vertical direction,
The vertical gap S between the gutter portions 12a is concealed by the inclined plate portion 12b. With such a configuration, the cold water C dripping from the filler block 4 is prevented from flowing into the gutter 12
It does not fall through the vertical gap S between the a.

Both ends of the entire gutter member 12 are provided with gutter portions 12a.
A support plate 13a formed with a semicircular notch in which
13b (see also FIG. 3).
These support plates 13a and 13b are both set on the beam 14. All the gutter members 12 are slightly inclined in one direction by making one support plate 13a higher than the other support plate 13b. By doing so, the cold water C flowing into the gutter portion 12a flows in a lower direction. The lower end 12c of the gutter 12a is open. The higher end 12d of the gutter portion 12a may be closed by the closing plate 15 or the like.

At the lower end of the entire gutter member 12, a plate member 16 corresponding to a water passage member described in the claims is suspended down to the cold water tank 11 (see also FIG. 1). The plate member 16 may be hung vertically or may be inclined. Further, the plate member 16 serves to guide the flow of the cold water C flowing from the lower open end 12c of the gutter portion 12a to the cold water tank 11. For such purposes,
The open end 12c of the gutter portion 12a may be in contact with the plate member 16, or a slight gap may be provided.

As described above, since the cold water flowing out of the gutter member 12 travels through the plate member 16 and reaches the cold water tank 11, the water falling from the filler block 4 does not directly fall on the cold water surface of the cold water tank 11, so that the falling sound is reduced. Does not occur. This cold water is temporarily stored in the cold water tank 11, and then circulated and sent for air conditioning and cooling of various facilities.

In the cooling tower 1 shown in FIG. 1, a plate member 16 is hung in the middle of the cooling tower 1 and a group of gutter members 12 are arranged on both sides of the cooling tower 1 so that the plate member 16 side is inclined. However, the present invention is not particularly limited as such. For example, a plate member may be hung on both end surfaces of the cooling tower 1 and a pair of gutter members may be disposed such that both end surfaces of the cooling tower 1 are lower. Further, a plate member may correspond to each of the plurality of groups of gutter members, and each gutter member group may be disposed such that the plate member side thereof is lower.

In the water collecting device 10 configured as described above,
Since the cooling water C is provided near the lower end of the filler block 4, the sound of the cold water C falling is extremely small and does not cause noise. Further, since the gutter members 12 are desired to be arranged with a gap therebetween, the air flow F rising from the air intake part 3 is sucked into the upper filler block 4 without great resistance. Therefore, the cooling effect of the hot water is not adversely affected.

In addition, as described above, since the vertical gap S between the gutter portions 12a is concealed by the inclined plate portion 12b, the cold water C flows in the vertical gap S between the gutter portions 12a.
Does not fall to the cold water tank 11 and generate noise.

Next, another embodiment of the gutter member is shown in FIG.

First, the gutter member 21 shown in FIG. 4 (a) is formed by integrating a gutter portion 21a having a U-shaped cross section and an inclined plate portion 21b, and one surface of the gutter portion 21a and the inclined plate portion 21b. Is continuous. The gutter member 21 can be formed from a synthetic resin by, for example, extrusion molding using a die having the same cross section. The gutter portion 21a is formed in two stages of large and small (up and down). Also in this gutter member 21, a gap through which the air flow F passes is formed between each other, and a gap S between the gutter portions 21a is closed in the vertical direction by the inclined plate portion 21b. Therefore, cold water C
Does not fall downward after passing between the gutter members 21.

The gutter member 22 shown in FIG. 4 (b) has a U-shaped cross section, and no inclined plate portion is formed. But,
Parallel rows of gutter members 22 are arranged in two upper and lower stages, and the gap S between the gutter members 22a (22b) in one stage is closed in the vertical direction by the gutter member 22b (22a) in the other stage. Therefore, the air flow F passes between the gutter members 22, but does not fall downward due to the passage of the cold water C.

The gutter member 23 shown in FIG. 4 (c) has a semicircular cross section, and has no inclined plate portion. Also in this figure, parallel rows of gutter members 23 are arranged in two stages, upper and lower, and the gap S between the gutter members 23a (23b) in one stage is closed in the vertical direction by the gutter member 23b (23a) in the other stage. Have been. Therefore, the air flow F passes between the gutter members 23, but does not fall down due to the passage of the cold water C.

Further, from the viewpoint of reducing the passage resistance of the air flow F, the gutter member 22 (FIG. 4 (b)) having a U-shaped cross section and the gutter member 23 (FIG. 4 (c)) having a semicircular cross section are preferable. .

The gutter member 22 shown in FIG. 4B and the gutter member 23 shown in FIG. 4C are not limited to the two-stage arrangement, but may be three or more stages.

In the above embodiment, the plate member is used to send the cold water flowing in the gutter member to the cold water tank. However, the present invention is not particularly limited to the arrangement of the plate member.

For example, a water collecting chamber communicating with all the gutter members of the gutter member row is disposed at the lower open end of the gutter member row arranged in parallel, and a water collecting chamber from this water collecting chamber to the cold water tank is provided. A water pipe may be provided.

In the above embodiment, the gutter members are arranged in parallel with the filling plate of the filler block (see FIG. 3). However, the present invention is not particularly limited to such a gutter member. The member and the filling plate may be orthogonal.

[0046]

According to the present invention, since the water collecting device is provided near the lower end of the filler block, the sound of the cold water falling from the filler block is extremely small and does not cause noise. . Further, since the gutter members are arranged with a gap therebetween, the rising cooling air flow is sucked into the upper filler block without great resistance. Therefore, the cooling effect of the hot water is not adversely affected. In addition, since the gap between the gutter members communicating with each other in the vertical direction is closed, cold water does not pass through the gap between the gutter members and fall into the chilled water tank to generate noise. Of course, there is no problem because the cold water is sent from the gutter member to the cold water tank through the water passage member.

Further, a louver conventionally provided to prevent water droplets from scattering to the outside becomes unnecessary.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing one embodiment of a cooling tower of the present invention.

FIG. 2 is a partially cutaway perspective view showing one embodiment of the water collecting device of the present invention in FIG. 1;

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIGS. 4 (a), 4 (b) and 4 (c) are cross-sectional views of essential parts showing another embodiment of a gutter member in the water collecting apparatus of the present invention.

FIG. 5 is a perspective view showing an example of a counterflow type cooling tower.

FIG. 6 is a schematic sectional view showing an example of a conventional counterflow type cooling tower.

FIG. 7 is a schematic sectional view showing another example of a conventional counterflow type cooling tower.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cooling tower 2 ... Cooling fan 3 ... Air intake part 4 ... Filler block 5 ... Hot water piping 6 ... Hot water supply pipe 7 ... Watering nozzle 8 ... Hot water flow gap 9: Filling plate 10: Water collecting device 11: Cold water tank 12, 21, 22, 23 ... Gutter member 12a, 21a ... Gutter portion 12b, 21b ... Inclined plate portion 13a , 13b: Support plate 14: Beam 15: Closing plate 16: Plate member

Claims (6)

[Claims] 1. In close proximity and directly below a filler block,
A water collecting device comprising: a plurality of gutter members arranged so as to be able to close a gap communicating with each other in the vertical direction and a water passage member for flowing water downward from the gutter member. apparatus. 2. A plurality of the gutter members are provided in each of a plurality of vertical stages, and a gutter member in another stage is disposed so as to close a gap formed by the gutter members in one stage. The water collecting device according to claim 1, wherein the water collecting device is provided. 3. The gutter member comprises a gutter portion arranged with a gap therebetween, and an inclined plate extending from a lower surface of a filler block to the gutter portion, wherein the inclined plate is connected to the gutter portions. 2. The water collecting device according to claim 1, wherein the water collecting device is configured to close a vertical gap of the water collecting device. 4. The water flow path member includes a water collection chamber disposed so as to communicate with the gutter member, and a water pipe extending from the water collection chamber to the cold water tank. Item 7. The water collecting device according to Item 1. 5. The gutter member is arranged to be inclined, and the water flow path includes a plate member which is provided upright at a lower end of the gutter member with a slight gap therebetween. The water collecting device as described. 6. A fan having a fan above the filler block,
A counter flow type cooling tower in which the flow of hot water in the filler block and the flow of air for cooling the hot water are opposed to each other. A water collecting device having air permeability for collecting water falling from the block and passing the water through an air intake portion located therebelow to a cold water tank is provided, wherein the water collecting device is provided. The cooling tower according to any one of Items 1 to 5, which comprises a water collecting device.