JP2003083687A - Upper water-tank in cooling tower and cooling tower provided with the tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cooling tower provided with an upper water-tank, in which a partition board is made shorter than the width and depth of the surrounding wall of the upper water-tank, the water-scattering area in the board is divided into inside and outside regions, as a result, even if outdoor air wet- bulb temperature is at ice point or below, the cooling water on a filling is prevented from freezing, and icing of scattered water at the outside inlet and outlet is prevented. SOLUTION: When the tank is used in winter, an opening/closing valve 21 of cooling-water supply pipes 18, 20 connected to the outside region 13 is closed, supply of the cooling water to the outside region 13 is stopped, and water is not scattered on the filling 22 located below the region 13. Freezing of the cooling water below the ice point is prevented, and adhesion of water-drops on the fan blades of the outlet 24 is reduced, and the blades are hardly iced over.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper water tank in a cooling tower and a cooling tower equipped with this upper water tank.

[0002]

2. Description of the Related Art In a conventional cooling tower, cooling water is sprayed from the entire upper water tank to obtain a predetermined cooling capacity with reference to summer, and in winter, the cooling water is supplied to this upper water tank. The amount is reduced by valve control, and is sprayed from the entire upper water tank to the entire filler.

[0003]

However, when water is sprinkled over the entire area of the filler in winter, the amount of water sprinkled per unit area is small, so that the film thickness of the cooling water flowing along the surface of the filler becomes thin and there is a risk of freezing. There is. This invention improves the sprinkling area inside the upper water tank and prevents freezing of the cooling water on the packing material even when the outside air wet bulb temperature is below freezing and also the outside air intake port or exhaust port of the cooling tower. It is an object of the present invention to provide an upper water tank in a cooling tower and a cooling tower equipped with this upper water tank capable of suppressing freezing of scattered water in both or both, to the market. Another object of the present invention is to provide to the market a cooling tower that can be operated below freezing.

[0004]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the inner surface of a flat rectangular upper water tank is divided into at least two spraying areas by a vertical partition plate, and at least one of these areas is divided. There is a cooling water supply unit in the area of the above, and when the outside air wet bulb temperature is below freezing, the amount of cooling water supplied to this upper water tank is reduced, and the spraying of cooling water from the other area is stopped. In the upper water tank in the cooling tower to be, the partition plate is formed to be shorter than the width and depth dimension of the upper water tank peripheral wall, the dispersion area of this partition plate is divided into two regions inside and outside, at least The cooling water supply unit is arranged in the inner region to serve as an upper water tank in a cooling tower.

In order to solve the above-mentioned problems, the partition plate in the upper water tank is a U-shaped plane, and both ends thereof are fixed to the inner surface of the long side located on the outside air intake side of the upper water tank. The cooling water supply section is installed in an inner area near the outside air intake located inside the U-shaped partition plate, and the cooling water supply section is capable of changing the supply water level, and is an outside area of the cooling water. It is preferable that the supply amount of the cooling water is adjustable, and that the supply amount of the cooling water is non-supplyable in the outer region when the outside air wet bulb temperature is below freezing. In order to solve the above-mentioned problem, the partition plate in this upper water tank is a planar U-shape, and both ends thereof are fixed to the inner surface of the long side located on the exhaust port side in the upper water tank, and the U-shape. The cooling water supply unit is installed in an inner region near the exhaust port closer to the inside of the cooling water supply unit, and the cooling water supply unit is capable of changing the supply water level. It may be adjustable, and when the outside air wet-bulb temperature is below freezing, the amount of cooling water supplied may be non-supplyable in the outer region.

In order to solve the above-mentioned problems, according to the related invention, the inside of a flat rectangular upper water tank is divided into at least two spray regions by a vertical partition plate, and at least one of these regions is An upper water tank in a cooling tower that has a cooling water supply unit that reduces the amount of cooling water supplied to this upper water tank when the outside air wet bulb temperature is below freezing and stops the spraying of cooling water from the other area. In the above, the partition plate is formed as a plane B-shaped, the cooling supply unit is installed inside the partition plate of the square B-shape, the cooling water supply unit is a supply water level changeable, The amount of cooling water supplied to the external region is adjustable, and when the outside air wet-bulb temperature is below freezing, the outside region is the upper water tank in the cooling tower, characterized in that the amount of cooling water supplied is non-supplyable. .

In order to solve the above-mentioned problems, cooling water supply pipes, which are the cooling water supply portions, are provided in the inner region and the outer region of the upper water tank, respectively, and at least:
It is desirable that a flow rate adjusting or opening / closing valve is provided in the cooling water supply pipe connected to the region located outside the partition plate. In order to solve the above-mentioned problem, cooling water supply pipes are respectively piped in the inner region and the outer region of the partition plate in this upper water tank, and each cooling water supply pipe is provided with a flow rate adjusting or opening / closing valve. Sometimes there is.

In order to solve the above problems, the related invention is
A cooling tower comprising the upper water tank according to claim 1, 2, 3, 4, 5, or 6.

In order to solve the above-mentioned problems, this cooling tower is an open type crossflow type cooling tower.

In order to solve the above-mentioned problems, this cooling tower is a closed type cross-flow type cooling tower. In order to solve the above-mentioned problem, the lower end entire circumference of the partition plate in this cooling tower extends downward near the upper edge of the filling material filled below the upper water tank, and the upper water tank and this filling material It is desirable that a separator for partitioning the adjacent cooling water dispersion areas of the filling material is formed in the space between them so as to face downward from a portion corresponding to the lower end position of the partition plate.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 In this embodiment, a representative embodiment of the invention described in claims 1, 2, and 5 is a representative embodiment of the invention described in claims 7, 8 and 10. It will be explained together. In FIG. 1, A indicates an open-type, cross-flow type cooling tower, and the inside of a flat rectangular upper water tank 10 in this cooling tower A is divided into two inner and outer regions 12 and 13 by a vertical partition plate 11. Is divided into
A cooling water supply unit 14 is arranged inside these inner and outer regions 12, 13. The partition plate 11 is formed in a U-shape in a plan view, the widthwise dimension thereof is sufficiently shorter than the width dimension of the upper water tank 10, and the depth dimension thereof is shorter than the depth dimension of the upper water tank 10. Both ends 15 and 1 of the partition plate 11
The upper water tank 6 is located at the outside air intake 17 side.
Is fixed to the inner surface of the long side a.

Cooling water supply pipes 18, 19 and 20 connected to the cooling water supply unit 14 are branched from the main pipe in the inner region 12 inside the partition plate 11 and the outer region 13 having a planar U-shape outside. An opening / closing valve 21 is provided in each of the cooling water supply pipes 18 and 20 connected to the outer region 13. The cooling water supply pipe 19 connected to the inner area 12
Also, the opening / closing valve 21 may be provided as needed (corresponding to the representative embodiment of the invention described in claim 6).

At the entire lower end position of the partition plate 11, the partition plate 11 extends downward near the upper edge of the filling material 22 filled below the upper water tank 10 and extends between the upper water tank 10 and the filling material 22. In the space, a separator 23 for partitioning adjacent spraying areas of the cooling water in the filler 22 is formed downward from the lower surface of the upper water tank (see FIG. 2).

When the apparatus according to the above-mentioned embodiment is used in winter, a cooling water supply pipe 18 connected to the outer region 13,
The on-off valve 21 of 20 is closed, the supply of cooling water to the outer region 13 is shut off, the water supply to the outer region 13 is stopped, and the portion of the filler 22 located below the outer region 13 is set to a non-sprinkling area. , The cooling water is sprayed to the filling material 22 only from the inner area 12, and only the filling material portion corresponding to the inner area 12 is brought into contact with the outside air flow and the cooling water, so that the cooling water per unit area is larger than that of a normal one. Of the water, the water film is thickened, the cooling water is prevented from freezing below the freezing point, the progress thereof is suppressed, and the exhaust port 24 of the cooling tower A is
The scattering of the cooling water from the inside is reduced, and water droplets are less attached to the blade of the blower of the exhaust port 24, so that almost no icing occurs. Further, the separator 23 prevents the cooling water from flowing into the non-sprinkling region of the filler 22 located below the outer region 13.

Embodiment 2 This embodiment is a typical embodiment of the invention described in claims 1, 3, 5 and 6, and the configuration different from that of Embodiment 1 is as follows.

In this embodiment, the partition plate 11 is formed in a U-shape in a plan view, and the dimension in the width direction is the upper water tank 1.
It is sufficiently shorter than the width of 0, and the depth is 10
Both ends of the U-shaped partition plate 11 that are shorter than the depth dimension of are fixed to the inner surface of the long side b of the upper water tank 10 located on the exhaust port 24 side, and are located inside the U-shape. The cooling water supply unit 14 is installed in each of the inner region 12 near the exhaust port 24 and the U-shaped outer region 13, and the outside air wet-bulb temperature is below the freezing point by adjusting the supply amount of the cooling water. In this case, stop the water supply to the outer area 13 (see FIG. 3). Besides, the same reference numerals as those in the first embodiment mean the same configurations.

The operation different from that of the first embodiment is as follows. Since the inner area 12, which is a spraying area in winter, is located away from the outside air intake 17, the scattering of cooling water to the outside air intake 17 of the cooling tower A is reduced,
Water droplets of the cooling water are prevented from adhering to the blades, louvers, and the like that constitute the outside air intake port 17, and this portion hardly freezes.

Embodiment 3 This embodiment is a typical embodiment of the invention described in claims 1, 4, 5, and 6, and the configuration different from that of Embodiment 1 is as follows. The partition plate 11 is formed as a plane B-shaped, and the width dimension and the depth dimension thereof are smaller than those of the upper water tank 10, and the inner side and the outer water tank 10 of the square-shaped partition plate 11 are inside. An inner region 12 and an outer region 13 are formed on the inner surface. Each of the cooling water supply units 14 is installed, the amount of cooling water supplied is adjusted, and when the outside-air wet-bulb temperature is below freezing, the water supply to the surrounding area located on the outer side 13 of the square shape is stopped. The lower filling material is a non-sprinkling area (see Fig. 4). Besides, the same reference numerals as those in the first embodiment mean the same configurations.

The operation different from that of the first embodiment is as follows. The inner region 12 has an outside air intake 17 and an exhaust port 24.
Since it is located farther from the side, the scattering of cooling water from the outside air intake port 17 and the exhaust port 24 of the cooling tower A is reduced in winter to cool the outside air intake port 17 and the exhaust port 24. Eliminates the adhesion of water droplets, and these parts become almost freezing. In the first to third embodiments, the height of the partition plate 11 is the same as the height of the outer peripheral wall of the upper water tank 10, and water is supplied to the inner and outer regions independently of each other. The height of the outer peripheral wall of the aquarium is slightly lower than this, and the inner region 1
Even if it can overflow into the area outside 2, it is included in the embodiment of the present invention.

Embodiment 4 This embodiment is a typical embodiment of the invention described in claims 1 and 2, and the configuration different from that of Embodiment 1 is as follows. The partition plate 11 is formed in a U-shape in a plane,
Both ends 15, 16 of the U-shaped partition plate 11 are fixed to the inner surface of the long side a of the upper water tank 10 located on the side of the outside air intake 17. The height of the partition plate 11 is lower than the height of the outer wall of the upper water tank 10. The width dimension and the depth dimension are the same as those in the first embodiment.
The cooling water supply unit 14 is installed only in the inner region 12 located inside the other partition plate 11. By adjusting the water level of the cooling water in the inner region 12, when the outside air wet bulb temperature is below freezing, the inner region 12 to the outer region 13 are
Supply of cooling water to the outer region 13 is stopped without overflowing the cooling water, and the filling material below this is used as a non-sprinkling region (see FIG. 5). In addition, the same reference numerals as those in the first embodiment indicate the same configurations.

The operation different from that of the first embodiment is as follows. The amount of cooling water supplied to the inner region 12 of the partition plate 11 is reduced, the water level in the inner region 12 is lowered below the height of the partition plate, and the supply of cooling water to the outer region 13 is stopped. The filler portion located below the region 13 is a non-sprinkling region, the cooling water is sprayed to the filler only from the inner region 12, and only the filler portion corresponding to the inner region 12 is cooled with the external air flow. Contact with water to increase the amount of cooling water sprayed per unit area than usual, thicken the water film, and prevent freezing of cooling water below freezing.
Further, the progress thereof is suppressed and the exhaust port 24 of the cooling tower A is also provided.
The scattering of the cooling water is reduced, the amount of water droplets attached to the blade of the blower of the exhaust port 24 is small, and almost no icing occurs.

Embodiment 5 This embodiment is a typical embodiment of the invention described in claims 1 and 3, and the configuration different from that of Embodiment 4 is as follows. The partition plate 11 is formed in a U-shape in a plane,
It is the same as the second embodiment and the height is the same as that of the fourth embodiment. Both ends 15 and 16 of the U-shaped partition plate 11 are fixed to the inner surface of the long side 25 located on the exhaust port 24 side of the upper water tank 10. The cooling supply unit 14 is installed only in the inner region 12.
By adjusting the water level of the cooling water in the inner region 12 as in the case of the fourth embodiment, the cooling water does not overflow from the inner region 12 to the outer region 13 when the outside air wet bulb temperature is below freezing, and the outer region The water supply to 13 is stopped, and the filling material below this is set as a non-sprinkling area (see FIG. 5). In addition, the same reference numerals as those in the first embodiment indicate the same configurations.

The operation different from that of the first embodiment is as follows. The amount of cooling water supplied to the region 12 located inside the partition plate 11 is reduced, and the region 1 located inside the partition plate 11 is reduced.
The water level at 2 is lower than the upper edge of the partition plate 11, and the supply of cooling water to the outer area 13 is stopped without overflowing to the side area 13, and the filler portion located below this area 13 is a non-sprinkling area. Then, the cooling water is sprinkled on the filling material only from the inner region 12 to form the inner region 12 of the partition plate 11.
Only in the filler part corresponding to the above, contact the outside air flow with cooling water, increase the amount of cooling water sprayed per unit area than usual, thicken the water film, and cool water below the freezing point. Prevent freezing. Further, while suppressing the progress thereof, the scattering of cooling water from the outside air intake port 17 of the cooling tower A is reduced, and the amount of water droplets adhering to the louver plate constituting the outside air intake port 1 is small. Freezing hardly occurs.

Embodiment 6 This embodiment is a typical embodiment of the invention described in claims 1 and 4, and the configuration different from that of Embodiment 4 is as follows. The partition plate 11 is formed in the shape of a plane square.
The partition plate 11 has a planar shape in the third embodiment.
And the height is the same as in the fourth and fifth embodiments. The cooling supply unit 14 is installed in the inner area 12, and when the outside-air wet-bulb temperature is below freezing, the amount of cooling water supplied to the inside is reduced to lower the water level of the cooling water so that the inside of the partition plate 11 is reduced. The overflow of the cooling water from the outside area 13 to the outside area 13 is stopped, and the filler portion below the outside area 13 is set as a non-sprinkling area (see FIG. 7). Other embodiments
The same reference numerals as 1 mean the same configurations.

The operation different from that of the fourth embodiment is as follows. In winter, the spraying area is only the inner area 12, and only the central portion of the upper water tank 10 has the outside air intake port 1
7 and the exhaust port 24 side are a little further away,
Outside air intake 17 and exhaust port 24 of the cooling tower A
The outside air intake 1
7 and the water droplets on the exhaust port 24 are prevented from adhering to each other, and these portions are hardly frozen. In each of the above-mentioned embodiments, the cooling tower is described as an open type and a cross flow type cooling tower, but it may be a closed type and a cross flow type cooling tower (a typical embodiment of the invention of claim 9). Corresponding to the form of).

[0026]

According to the first aspect of the present invention, since it is constructed and operates as described above, the cooling water supply area is set to the whole inside or outside in the winter season when there is a risk of freezing and the season when it is not. It is possible to select only the area, and especially when the cooling water is supplied only to the inner area, this cooling water is not sprayed to the filler portion below the outer area, and the filler portion below the inner area. Even if the outside air wet-bulb temperature is below freezing, it prevents the cooling water from freezing in the packing material below the outside area, and also prevents the freezing of splashed water at the outside air intake or exhaust port of the cooling tower. Can be suppressed.

According to a second aspect of the present invention, the partition plate is configured as described above, and in particular, the partition plate has a U-shaped plane shape, and both ends thereof are located at the outside air intake port side of the upper water tank. The cooling water supply unit is installed in an inner region fixed to the inner surface of the side and located inside the U-shaped partition plate near the outside air intake port, and the cooling water supply unit is capable of changing the supply water level. The amount of cooling water supplied to the external region can be adjusted by the partition plate, and when the temperature of the outside air wet bulb is below freezing, the amount of cooling water supplied to the outside region is non-feedable, so the outside air wet bulb is When the temperature is below freezing, the cooling water can be supplied to the outside area without supplying water.Therefore, even if the outside air wet bulb temperature is below freezing, the cooling water is prevented from freezing on the packing material and the cooling tower exhaust is exhausted. Splashing cooling water to the mouth It was reduced, thereby suppressing the freezing of scattering water in the exhaust port.

According to the third aspect of the present invention, since it is constructed and functions as described above, in particular, both ends of the partition plate are fixed to the inner surface of the long side located on the exhaust port side of the upper water tank. Even when the outside air wet-bulb temperature is below freezing, the cooling water is prevented from freezing on the packing material and the scattering of the cooling water to the outside air intake of the cooling tower is reduced, and the water splashed at this outside air intake is frozen. Can be suppressed.

According to the invention of claim 4, since it is configured and operates as described above, when the outside air wet-bulb temperature is below freezing, the outside region can be supplied with no cooling water so that the outside air is not supplied. Even when the wet-bulb temperature is below freezing, there is a non-scattering area near the outside air intake port and exhaust port, reducing the scattering of cooling water to the outside air intake port and exhaust port of the cooling tower. It is possible to suppress the freezing of the scattered water.

In the invention according to claim 5, cooling water supply pipes, which are the cooling water supply parts, are piped in the inner region and the outer region, respectively, and at least in a region located outside the partition plate. Since the continuous cooling water supply pipe is provided with a flow rate adjusting or opening / closing valve, by the valve operation, on / off or adjusting the supply of the cooling water to the outer region of the partition plate, the effect below the freezing point is obtained. Can be demonstrated.

According to the sixth aspect of the invention, cooling water supply pipes serving as the cooling water supply portions are provided in the inner region and the outer region of the partition plate, and the flow rate is adjusted in each cooling water supply pipe. Further, since the opening / closing valve is provided, it is possible to appropriately supply and stop the cooling water to the region, and to more reliably exhibit the above effects.

According to the invention of claim 7, the effects of the inventions of claims 1, 2, 3, 4, 5, and 6 can be exerted,
The operation below the freezing point can be performed while suppressing the freezing phenomenon.

According to the eighth aspect of the present invention, the above effects can be exhibited in an open type cross flow type cooling tower. In the invention according to claim 9, the effect can be exerted in a closed type, cross-flow type cooling tower.

According to a tenth aspect of the present invention, the entire lower end circumference of the partition plate extends downward near the upper edge of the filling material filled below the upper water tank, and the upper water tank and the filling material are separated from each other. In addition to the above effect, in the space between the separators, a separator for partitioning the adjacent cooling water dispersion areas in the filler is formed downward from the lower surface of the upper water tank at a position corresponding to the position of the partition plate. To the non-sprinkling area,
It is possible to prevent the cooling water from flowing in.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an entire first embodiment.

FIG. 2 is a front view of FIG.

FIG. 3 is a schematic plan view showing a main part of the second embodiment.

FIG. 4 is a schematic plan view showing the main parts of the third embodiment.

FIG. 5 is a schematic plan view showing the main parts of the fourth embodiment.

FIG. 6 is a schematic plan view showing the main parts of the fifth embodiment.

FIG. 7 is a schematic plan view showing the main parts of the sixth embodiment.

[Explanation of symbols]

A cooling tower 10 Upper tank 11 partition boards 12 Inside area 13 Outer area 14 Cooling water supply unit 17 Outside air intake 18, 19, 20 Cooling water supply pipe

Claims (10)

[Claims] 1. A flat rectangular upper water tank is divided into at least two spraying areas by a vertical partition plate, and a cooling water supply section is arranged in at least one of these areas. , An upper water tank in a cooling tower that reduces the amount of cooling water supplied to this upper water tank when the outside air wet bulb temperature is below freezing and stops the spraying of cooling water from the other area, wherein the partition plate is an upper portion. It is formed to be shorter than the width and depth of the water tank peripheral wall, and the partition plate divides the spraying region into two regions, an inner region and an outer region, and the cooling water supply unit is arranged at least in the inner region. An upper water tank in a cooling tower, which is characterized in that 2. The partition plate is U-shaped in plan view, and both ends of the partition plate are fixed to inner surfaces of long sides located on the outside air intake side of the upper water tank. The cooling water supply unit is installed in an inner region near the outside air intake located, the cooling water supply unit is capable of changing the supply water level, and the supply amount of the cooling water to the outer region can be adjusted. The upper water tank in the cooling tower according to claim 1, wherein when the outside air wet bulb temperature is below freezing, the amount of cooling water supplied to the outer region is non-supplyable. 3. The partition plate is U-shaped in plan view, and both ends thereof are fixed to inner surfaces of long sides located on the exhaust port side of the upper water tank, and are located inside the U-shaped partition. The cooling water supply unit is installed in an inner region near the exhaust port of the cooling water supply unit, the supply level of the cooling water can be changed, and the amount of the cooling water supplied to the outer region can be adjusted. The upper water tank in the cooling tower according to claim 1, wherein when the wet-bulb temperature is below freezing, the cooling water can be supplied to the outer region without supplying water. 4. The inside of a flat rectangular upper water tank is divided into at least two spray areas by a vertical partition plate, and a cooling water supply unit is arranged in at least one of these areas. In the upper water tank in the cooling tower, which reduces the amount of cooling water supplied to this upper water tank when the outside air wet bulb temperature is below freezing and stops the spraying of cooling water from the other area, the partition plate is The cooling water supply part is installed inside the partition plate having a square shape, and the cooling water supply part is capable of changing the supply water level, and the cooling water overflowing from the partition plate. The upper water tank in the cooling tower is characterized in that the amount of supply of the cooling water to the outside region of the cooling tower is adjustable, and when the outside air wet bulb temperature is below freezing, the cooling water is not supplied to the outside region. 5. A cooling water supply pipe serving as the cooling water supply portion is provided in each of the inner region and the outer region, and at least the cooling water supply pipe connected to the region located outside the partition plate. The upper water tank in the cooling tower according to claim 1, 2, 3 or 4, wherein a flow rate adjusting or opening / closing valve is provided. 6. A cooling water supply pipe, which is the cooling water supply unit, is provided in each of an inner region and an outer region of the partition plate, and each cooling water supply pipe is provided with a flow rate adjusting or opening / closing valve. The upper water tank in the cooling tower according to claim 1, 2, 3, or 4. 7. A cooling tower comprising an upper water tank according to claim 1, 2, 3, 4, 5 or 6. 8. The cooling tower according to claim 7, wherein the cooling tower is an open type crossflow cooling tower. 9. The cooling tower according to claim 7, wherein the cooling tower is a closed type crossflow type cooling tower. 10. The entire lower edge of the partition plate extends downward near the upper edge of the filler filled below the upper water tank,
In the space between the upper water tank and the filling material, a separator for partitioning adjacent cooling water distribution areas in the filling material is formed downward from the lower surface of the upper water tank corresponding to the partition plate position. 7. The method according to claim 7, wherein
The cooling tower according to 8 or 9.