JP6958407B2 - Cooling tower and concentration management method for cooling tower - Google Patents

Description

The present invention relates to a cooling tower of an open circulation cooling facility, a water collector inserted into the filler of the cooling tower, a method for concentrating and controlling the cooling tower, and a solid drug dissolving device.

In the cooling tower of the open circulation cooling facility, water is sprinkled from above on the filler installed in the tower, and the filler is ventilated by a fan to evaporate the water, and the latent heat of evaporation at this time cools the water (cooling water). It is configured to do.

In Patent Document 1, a water collector is inserted into a filler to collect water, and the collected water is passed through a solid drug container to dissolve a solid drug such as a scale inhibitor to obtain a drug solution, and the drug is dissolved. Is described as a chemical injection device that supplies the cooling tower.

As described in Patent Document 2, the cooling water of the cooling tower flows downward while being transmitted through the filler. A fan is provided in the cooling tower, and an air flow passes from the outer peripheral side of the filler to the central side of the cooling tower.

In such a cooling tower, the cooling water flowing down the outer edge region of the cooling tower is blown toward the center side of the cooling tower by the air flow, so that the cooling water is less likely to be applied to the outer edge portion of the filler. As a result, wetting and drying are repeated at the outer edge of the filler, and impurities such as silica contained in the cooling water are concentrated and adhere as scales.

Therefore, in Patent Document 2, in order to prevent scale generation of the filler due to wetting and drying due to repeated stoppage and operation of the cooling system, make-up water is sprinkled on the filler when the operation of the cooling system is stopped to wet and dry. It is described to prevent and prevent scale generation.

Japanese Unexamined Patent Publication No. 2013-210134 Japanese Unexamined Patent Publication No. 2013-210136

The filler of the cooling tower has a structure in which a large number of plate bodies with the plate surface in the vertical direction are arranged at predetermined intervals, and the water sprinkled from the upper part flows down while being transmitted through the plate surface. The water collector of Patent Document 1 has a gutter shape, is inserted between the plates of the filler, and is configured to receive the flowing water and discharge it to the outside of the cooling tower.

Since the plate body of the filler has a non-flat shape having concave portions and convex portions, the water collector inserted between the plate bodies does not come into close contact with the plate body. Therefore, it is difficult for the water flowing down the plate surface to enter the water collector, and the water collection efficiency is not so high.

According to the present invention, a water collector having a high water collecting efficiency when inserted into a filler, a cooling tower equipped with the water collector, a solid drug dissolving device using the water collector, and a cooling tower are concentrated. The purpose is to provide a management method.

The water collector of the present invention is a water collector that is inserted into the filler of a cooling tower, and is a water collector having a water passage having a recess extending in the longitudinal direction of the water collector. It is characterized in that a soft material is provided on at least one outward side surface (hereinafter, referred to as an outer surface) of the water collector.

In one aspect of the present invention, the soft material is provided on both outer surfaces of the water collector so as to extend in the longitudinal direction of the water collector.

In one aspect of the present invention, the soft material is attached to at least the upper part of the outer surface of the water collector body having the water flow channel.

The solid drug dissolving device of the present invention includes the above-mentioned water collector and a solid drug container through which the water collected by the water collector is passed.

The cooling tower according to one aspect of the present invention is a cooling tower in which the water collector is inserted into the filler, and the soft material is elastically adhered to the filler.

In one aspect of this cooling tower, a solid drug container through which the water collected by the water collector is passed and a water channel member that supplies a drug solution from the solid drug container to the filler are provided. It is provided.

The method for controlling the concentration of a cooling tower of the present invention is a method for controlling the concentration of the cooling tower, and includes a step of discharging at least a part of the water collected by the water collector to the outside of the cooling tower.

Another aspect of the cooling tower of the present invention is a cooling tower in which a filler is installed in the tower and a fan for passing an air flow from the outer peripheral surface side to the inner peripheral surface side of the filler is installed. The water collector is installed on the upper part of the filler in the direction connecting the outer peripheral surface side and the inner peripheral surface side, and the outer peripheral surface side is installed at a slope lower than the inner peripheral surface side. The water flowing out from the outer peripheral surface side of the water vessel is configured to be poured onto the outer peripheral surface side of the filler.

The water collector of the present invention is provided with a soft material on the outer surface (in the present invention, the outer surface of the water collector means an outward side surface of the water collector facing outward). Therefore, when the soft material is inserted between the fillers of the cooling tower, the soft material comes into close contact with the filler. As a result, the cooling water that has fallen down through the filler can efficiently enter the water collector, and the water collection efficiency becomes high.

The solid drug dissolving device of the present invention is configured to pass the water collected by the water collector into the solid drug container, and the drug dissolving solution can be efficiently supplied to the cooling tower. ..

Further, the cooling tower provided with the water collector of the present invention can perform concentration management of the cooling tower by discharging at least a part of the water collected by the water collector to the outside of the cooling tower.

The water collector of the present invention is provided on the upper part of the filler in the direction connecting the outer peripheral surface side and the inner peripheral surface side, and the water collected by the water collector is supplied to the outer peripheral surface side of the filler for filling. Scale caused by wetting and drying on the outer peripheral surface side of the material is prevented.

The water collector according to the embodiment is shown, (a) is a perspective view of the water collector main body, (b) is a perspective view of the water collector, and (c) is a cross section taken along the line CC of (a). FIG. 3D is a cross-sectional view taken along the line DD of FIG. It is a schematic vertical sectional view of the cooling tower which concerns on embodiment. FIG. 2 is a cross-sectional view taken along the line III-III of FIG. It is a schematic vertical sectional view of the cooling tower which concerns on embodiment. It is a perspective view which shows another example of a water collector main body.

Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 shows a water collector 1 according to an embodiment. The water collector 1 has a tub-shaped water collector main body 2 and a soft material 3 attached to both outer surfaces of the water collector main body 2. In this embodiment, the water collector main body 2 has a V-shaped cross-sectional shape with an open upper surface, and has a left side wall portion 2a and a right side wall portion 2b. On the tip end side of the water collector 1, the left side wall portion 2a and the right side wall portion 2b are connected by a heat fusion portion 2c. Between the left and right side wall portions 2a and 2b is a flowing water channel 2d that opens upward.

In this embodiment, since the water collector main body 2 is made of thermoplastic synthetic resin, the left and right side wall portions 2a and 2b are heat-sealed on the tip side of the water collector 1, but the water collector The material of the main body 2 is not limited to this, and a thermosetting synthetic resin, a metal, or the like may be used.

In this embodiment, the soft material 3 is attached to the upper part of the outer surface of the left and right side wall portions 2a and 2b. As the soft material 3, a soft resin such as a foamed synthetic resin, rubber, an elastomer, or the like can be used, and among them, a foamed synthetic resin having low resilience is preferable. In this embodiment, the soft material 3 may be continuously provided from the rear end side to the tip end side of the water collector main body 2, or may be partially interrupted. Further, in this embodiment, the soft material 3 attached to the left side wall portion 2a wraps around the tip end portion of the water collector main body 2 and is continuous with the soft material 3 on the right side wall portion 2b side. However, the present invention is not limited to this, and the left and right soft materials 3 may be separate bodies. Further, the soft material 3 may be partially provided, such as only on the tip end side of the water collector main body 2.

In this embodiment, the soft material 3 is provided on the upper portion of the side wall portions 2a and 2b, but may be other than the upper portion. Further, the soft material 3 may be provided up to the lower part of the side wall portions 2a and 2b. However, when the water collector main body 2 has a shape such as a V shape that becomes wider toward the upper side, the soft material 3 may be provided only on the upper portions of the left and right side wall portions. Although the effect of improving the water collection efficiency is substantially halved, the soft material 3 may be provided only on one of the left and right side wall portions 2a and 2b.

The water collector main body 2 is not limited to the V shape, and may be a U shape, a semicircle, a semi-elliptical shape, an upward U-shape, an inverted trapezoid, or the like. The V-shaped water collector main body 2 is suitable because it can be easily manufactured by bending a flat band-shaped member along a center line extending in the longitudinal direction.

FIGS. 2 and 3 show an example of a cooling tower using the water collector 1.

The cooling tower 11 is provided with a casing (tower body) 12 and a lower water tank (pit) 14 for cooling water is provided at the bottom thereof. A louver 13 is provided on the side surface of the casing 12 to form an air inlet. The filler 15 is housed in the casing 12, and the upper water tank 16 is installed above the filler 15. The bottom plate of the upper water tank 16 is composed of a sprinkler plate 16a having a large number of small holes. A vacant chamber 17 is provided in the central portion (central portion in a plan view) of the casing 12, and a fan 18 is provided above the vacant chamber 17.

The suction side of the pump 19 is connected to the bottom of the lower water tank 14, and the discharge side of the pump 19 is connected to one end of the heat exchanger via the outbound pipe 20 of the cooling water. The other end of the heat exchanger can be injected into the upper water tank 16 of the cooling tower 11 via the cooling water return pipe 21.

Although not shown, the lower water tank 14 is provided with a ball tap to which a water supply pipe for make-up water (groundwater, tap water, industrial water, etc.) is connected to keep the water level of the lower water tank 14 within a set range. ing. Further, the lower water tank 14 is provided with a blow pipe having a blow valve (or a blow pump) and an overflow pipe.

Water that has fallen from the sprinkler plate 16a is poured onto the upper surface of the filler 15.

The water collector 1 is inserted into the filler 15 from the outside of the cooling tower 11 through the louver 13. The width of the water collector main body 2 is smaller than the distance between the plate bodies 15a and 15a constituting the filler 15. The width of the water collector 1 (the distance between the outermost ends of the left and right soft materials 3 and 3) is larger than the distance between the plate bodies 15a and 15a. Therefore, when the water collector 1 is inserted into the filler 15, the soft materials 3 and 3 come into close contact with the plate bodies 15a and 15a. As a result, the water W that has traveled down through the plate bodies 15a and 15a efficiently flows into the water flow channel 2d of the water collector 1. The water W flows through the water flow channel 2d, flows into the solid drug container 6 from the hose 5, and the solid drug dissolves into the drug solution. This chemical solution is supplied to the pit 14 via the chemical injection pipe 7.

The solid drug dissolving device 8 is composed of a water collector 1, a hose 5, a solid drug container 6, and a chemical injection pipe 7. Although the hose 5 is used in FIG. 2, the hose 5 may be configured to inject water directly from the water collector 1 into the solid drug container 6. Further, in FIG. 2, the solid drug container 6 injects water from the upper part and discharges the drug solution from the lower part. However, water is injected into the lower part of the solid drug container and the drug solution is discharged from the lower part. Various things such as things can be used.

In the case of FIG. 2, the soft material 3 may be provided only in the portion of the water collector main body 2 that is inserted into the filler 15.

In FIG. 2, the water collector 1 is used for the solid drug dissolving device, but the solid drug container 6 is omitted, and at least a part of the water collected by the water collector 1 is discharged to the outside of the cooling tower 11. Therefore, the concentration management of the cooling tower 11 may be performed.

With reference to FIG. 4, a cooling tower 11 ′ configured to prevent scale generation due to wetting and drying will be described.

In the cooling tower 11', the water collector 1 is connected to the outer peripheral surface side and the inner peripheral surface side of the filler 15 on the upper portion of the filler 15, that is, in the direction connecting the space portion 17 and the louver 13 and the outer peripheral surface. The side is installed with a flowing water gradient that is lower than the inner peripheral surface side.

In this cooling tower 11', the solid drug dissolving device 8 is omitted, but it may be installed in the same manner as in FIGS. 2 and 3.

Other configurations of the cooling tower 11'of FIG. 4 are the same as those of the cooling tower 11 of FIG. 2, and the same reference numerals indicate the same parts. In this embodiment, since a part of the water on the inner peripheral surface side of the filler 15 is transferred to the outer peripheral surface side by the water collector 1, the outer peripheral surface side of the filler 15 is always wet with water. Scale generation due to wetting and drying is prevented.

When the water collector 1 is used for transferring water in the upper part of the filler as shown in FIG. 4, an appropriate number of water outflow holes 2h are provided on the rear side of the water collector main body 2'as shown in FIG. May be sprinkled out from the rear side of the water collector 1. The other configurations of the water collector main body 2'are the same as those of the water collector main body 2, and the same reference numerals indicate the same parts.

The above embodiment is an example of the present invention, and the present invention may be a form other than the above.

[Example 1]
The water collector shown in FIG. 1 was inserted into the filler of the actual cooling tower, and the amount of water collected was determined.

<Experimental conditions>
A low-foaming polypropylene sheet (trade name: F-cell manufactured by Furukawa Electric Co., Ltd.) was bent so that the cross section had a V-shape, and a water collector body 2'with a height of 20 mm, a width of 20 mm, and a length of 300 mm was manufactured.

Chemically cross-linked polyethylene resin foam (manufactured by Sanwa Kako, apparent density 0.05 g / cm ³ product name: Opcel) with a thickness of 10 mm, a width of 10 mm, and a length of 300 mm is placed on both outer sides of the water collector body 2 on each side. It was attached to the water collector 1 to make it a water collector 1.

This water collector 1 was inserted into a filler gap with a width of 13 mm in a cooling tower (Kuraken Kogyo model: SKB-62TR) so that the effective length was 200 mm, and the amount of water collected per unit time was calculated to be 1.8 L. It was / min.

[Comparative Example 1]
<Experimental conditions>
A hard vinyl chloride pipe with a length of 300 mm and a nominal diameter of VP13 divided horizontally in half in the longitudinal direction is used as a water collector, and the same as in Example 1 is inserted so that the effective length is 200 m in the gap of the cooling tower filler. As a result, it was 0.17 L / min, which was a remarkably small amount.

1 Water collector 2, 2'Water collector body 3 Soft material 6 Solid drug container 8 Solid drug dissolving device 11, 11' Cooling tower 15 Filler 15a Plate 18 Fan

Claims (7)

In a cooling tower in which a filler is installed in the tower and a water collector is inserted into the filler.
The water collector has a water channel composed of recesses extending in the longitudinal direction of the water collector.
A soft material is provided at least on at least one outer side surface (hereinafter referred to as an outer surface) of the water collector.
Cooling tower, characterized in that said soft material is elastically close contact with the filler. The cooling tower according to claim 1, wherein the soft material is provided on both outer surfaces of the water collector so as to extend in the longitudinal direction of the water collector . Cooling according to claim 1 or 2 , which has a solid drug container through which the water collected by the water collector is passed, and a water channel member for supplying a drug solution from the solid drug container to the filler. Tower. A method for controlling concentration of a cooling tower according to any one of claims 1 to 3.
Enrichment management method of the cooling tower having a step of discharging at least a portion of the water collecting in the water collecting device outside the cooling tower. A cooling tower in which a filler is installed in the tower, a fan for passing an air flow from the outer peripheral surface side to the inner peripheral surface side of the filler is installed, and a water collector is inserted into the filler. In
The water collector has a water channel composed of recesses extending in the longitudinal direction of the water collector.
A soft material is provided on at least one outward side surface (hereinafter, referred to as an outer surface) of the water collector.
It said population condenser in a direction connecting the outer peripheral surface and inner peripheral surface of the filling material on top of the filling material, and is installed at a gradient outer peripheral surface side is lower than the inner peripheral surface side Cage,
A cooling tower characterized in that water flowing out from the outer peripheral surface side of the water collector is poured onto the outer peripheral surface side of the filler. The cooling tower according to claim 5, wherein the soft material is provided on both outer surfaces of the water collector so as to extend in the longitudinal direction of the water collector. The cooling tower according to claim 5 or 6, wherein the soft material is attached to at least an upper portion of an outer surface of the water collector.

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