JP4809073B2 - cooling tower - Google Patents

Description

  The present invention relates to a cooling tower that circulates and supplies cooling water used in a refrigerator, a cold / hot water machine, a heat exchanger for various processes, and the like.

  The cooling tower has a chemical tank and chemical pump containing a chemical solution for water treatment to prevent corrosion and scale adhesion, and prevent the generation and propagation of slime and microorganisms. A blow control device for controlling blow to be performed to prevent the occurrence of the failure is attached.

  However, such a cooling tower is often installed in a limited space such as the roof of a building, and is required to be compact.

  Here, Patent Document 1 proposes a technique that effectively uses a narrow space by storing a chemical tank and a chemical injection pump between legs on which the cooling tower body is placed.

  In the technique described in Patent Document 1, since the chemical liquid tank and the chemical injection pump are accommodated between the legs on which the cooling tower is placed, the operability during maintenance is low and improvement is required.

  The chemical solution injected into the cooling tower usually has the same chemical solution over a long period of time, because microorganisms resistant to the chemical solution propagate and the effect of the chemical solution injection becomes low. The tank is not simply kept adding the same chemical solution, but may be appropriately changed to another type of chemical solution having a different antibacterial spectrum.

When changing the chemical solution, take out all the remaining chemical solution from the chemical solution tank, clean the tank, and then fill it with new chemical solution. Cannot be provided with a mouth, or even if it is provided, the chemical solution and washing water cannot be completely removed from the tank, and the pump (generally the same manual pump used for transferring kerosene etc. ), Etc., and workability is low, and spills out of the system are likely to occur during the work.
JP-A-8-5283

  An object of the present invention is to provide a cooling tower that improves the above-described conventional problems, that is, is space-saving and excellent in maintainability such as chemical solution exchange.

In order to solve the above problems, the cooling tower of the present invention comprises a fan in the upper part and a lower water tank in the lower part, and an air flow is supplied to the fan below the fan and above the lower water tank. A cooling tower having a ventilation space for guiding, a cooling tower provided with a chemical liquid tank for water treatment in the ventilation space , wherein the chemical liquid tank is partly projected on the outer surface of the cooling tower. And a chemical quality tank for checking the quality of the aqueous water, and a pump for adding the chemical liquid in the chemical liquid tank to the aqueous water of the cooling water system having the cooling tower. It is a cooling tower characterized by being unitized with the control part of a means, and this unit is detachably installed in the said cooling tower .

The cooling tower of the present invention, as described in claim 2, in the cooling tower according to claim 1, situated in the lowest part outside the cooling tower of the chemical tank and said to the lowest portion A liquid draining port for discharging the chemical liquid in the chemical liquid tank is provided.

The cooling tower of the present invention, as described in claim 3, in the cooling tower according to claim 1 or claim 2, the level gauge indicating the liquid level of the chemical liquid tank, the cooling tower It is characterized by having outside.

  According to the cooling tower of the present invention, the space in the cooling tower can be used effectively, and the operation of the chemical solution replacement and the chemical solution tank cleaning becomes easy, and the chemical solution leaks out of the system during these operations. Can be prevented.

Further, the operability is improved, and by providing the tank opening only at the portion protruding from the outer surface of the cooling tower, it is possible to prevent the chemical liquid inside the tank from leaking into the cooling tower.
In addition, the cooling tower accessories such as the chemical tank, chemical pump, and control unit for water quality inspection are unitized and installed in the cooling tower body in advance. Or, piping and wiring work between these devices becomes unnecessary. In addition, since various accessory devices are unitized, they can be easily replaced, maintained, and adjusted.

Further, according to the cooling tower of the present invention as set forth in claim 2 , in addition to the above effect, the chemical liquid in the chemical liquid tank can be completely discharged easily and the tank can be completely cleaned.

Further, according to the cooling tower of the present invention described in claim 3 , in addition to the above effects, an inexpensive tubular liquid level gauge can be used, and confirmation of the liquid level in the tank is extremely easy. Even when the chemical liquid leaks from the level gauge mounting portion, it is possible to prevent the chemical liquid from leaking into the cooling tower.

The cooling tower according to the present invention will be described with reference to the drawings.
1A is a front view of the side surface of the cooling tower A on the ladder 1 installation side, and FIG. 1B is a side view of the right side of the cooling tower A. 2A is a cross-sectional view of the cross section including the chemical liquid tank 5 as viewed from the front, and FIG. 2B is a cross sectional view of the cross section including the chemical liquid tank 5 viewed from the right side of the cooling tower A. 3 (a) to 3 (c) are views showing a state in which the chemical liquid tank 5, the chemical liquid pump 6 and the control unit 7 of the water quality inspection means are unitized, and FIG. 3 (a) is a top view. 3B is a cross-sectional view taken along the line LL in FIG. 3A, and FIG. 3C is a front view.

  1 and 2, reference numeral 2 denotes a cooling tower body, and the cooling tower body 2 is placed on the legs 3. The cooling tower front (maintenance side) is provided with an inlet 2a used when the inside of the cooling tower body 2 is inspected, cleaned, and the like.

  The cooling tower body 2 is provided with a fan 2b at the upper part and a lower water tank 2c at the lower part, and two fillers (filler layer parts) 2d on the left and right above the lower water tank and watering above it. Between the portion 2f, the central portion of the cooling tower body 2, and the two left and right fillers 2d, there is a ventilation space 2g for guiding the airflow that has passed through the fillers 2d to the fan 2b.

  That is, the airflow introduced from the left and right ventilation wall portions 2h of the cooling tower body 2 flows into the ventilation space portion 2g through the inside of the filler 2d, and is discharged out of the cooling tower body 2 by the upper fan 2b. A part of the cooling water supplied from the sprinkling part 2f to the filler 2d by this air flow evaporates and loses heat of vaporization and is cooled.

  The ventilation space 2g is an important space through which this airflow passes, but there is almost no airflow passing near the liquid level of the lower water tank 2c where the chemical tank 5 is installed, and the ventilation space 2g is used for water treatment. The decrease in the cooling capacity due to the installation of the chemical liquid tank 5 in the cooling tower A provided with the chemical liquid tank 5 can be completely ignored. Thus, when providing the chemical | medical solution tank 5 in the ventilation space part, it is desirable to provide so that it may become near the liquid level of the cooling water of the lower water tank 2c.

  Here, the chemical liquid tank 5 may be installed so that a part of the chemical liquid tank 5 is lower than the liquid level of the cooling water, but in this case, the lowest part of the chemical liquid tank 5 is located outside the cooling tower body A. In addition, it becomes difficult to clean and maintain the inside of the cooling tower A, and when the unit is removable from the cooling tower body A, it is difficult to remove.

  As shown in FIGS. 3A to 3C, the chemical liquid tank 5 adds the chemical liquid 10 in the chemical liquid tank 5 to the cooling water of the cooling tower A (or the cooling water system having the cooling tower A). A pump 6 and a control unit 7 of water quality inspection means for checking the quality of the cooling water are unitized, and the unit is detachably installed on the front wall portion of the cooling tower body 2.

  The chemical solution tank 5 is made of polyethylene in this example, and the chemical solution tank 5 has a lid on the upper portion (upper end portion in this example) protruding from the outer surface of the cooling tower body 2 of the cooling tower body 2. The lower part of the protruding portion of the inlet 5e is the lowest part (5b) in the chemical tank 5, and the lowest part 5b is filled with the chemical 10 in the chemical tank 5 and washing water at the time of washing. A liquid outlet 5b1 with a lid for discharging is provided. As described above, since the chemical solution inlet 5e is provided at the upper portion of the protruding portion, the chemical solution tank 5 can be easily filled with the chemical solution from the outside of the cooling tower, and the internal volume of the chemical solution tank 5 can be obtained. Can be used as effectively as possible, and since the liquid drain port 5b1 is provided at the lowest part of the chemical liquid tank 5, it is easy to exchange and clean the type of chemical liquid, and also below the liquid drain port 5b1. Since there is sufficient space, drainage can be easily recovered without a pump when draining liquid or cleaning internal parts.

  Further, a concave portion is provided on the side surface of the portion protruding from the outer surface of the cooling tower body 2, and a liquid level gauge 5 a indicating the liquid level height of the chemical liquid 10 in the chemical liquid tank 5 is provided in the concave portion. Thus, since the liquid level gauge 5a is provided outside the cooling tower main body 2, it is easy to check the internal volume of the chemical solution 10. Further, since the liquid level gauge 5a is provided in the concave portion of the chemical liquid tank 5, it is difficult to break due to a collision or the like, so that a relatively inexpensive tubular liquid level gauge can be used.

  Even if the liquid level gauge 5a breaks or leaks from the top and bottom, the liquid level gauge 5a is located outside the cooling tower body 2, so that the chemical solution 10 is cooled. The accident of being poured into the cooling water of the tower body 2 at a high concentration is prevented.

  The pump 6 is a pump for adding the chemical solution 10 in the chemical solution tank 5 to the cooling water system water having the cooling tower. The chemical solution tank 5 has a suction pipe 6a, and the suction pipe 6a is near the bottom of the chemical solution tank 5. Has reached. The pump 6 continuously or intermittently supplies the chemical solution 10 to the cooling water of the cooling tower A through a supply pipe (not shown).

  Further, this unit has a control unit 7 of water quality inspection means for checking the quality of the aqueous water. As a water quality inspection means, a chloride ion meter, an electric conductivity meter, etc. are generally used, but these are usually a combination of two parts, a sensor unit (not shown) and a control unit 7, and the sensor unit is cooled. It is provided at a position in contact with water, and is electrically connected to the control unit 7 by electric wires and cords. The control unit 7 performs sensitivity adjustment of the sensor unit.

  As described above, since the unit is detachably installed on the front wall portion of the cooling tower body 2, it is possible to save trouble of installation of individual devices, piping, and wiring, and a failure of the unit mechanism should occur. In this case, it is possible to replace the entire unit.

  Further, the protrusion part from which the unit partially protrudes from the cooling tower body 2 is located on the front wall part of the cooling tower A, and in this example, the ladder 1 is on the same side, but at a position away from this protrusion part. Is provided. However, when the height of the leg portion 3 is high due to the design requirements of the cooling tower, etc., the outer wall surface of the cooling tower body 2 adjacent to the ladder 1 can be used so that the ladder 1 can be used during the work such as chemical exchange. The above unit or chemical tank 5 may be provided.

  In FIG. 3 (b), the reference numeral 5d indicates the unit leg, and when the unit is removed from the cooling tower body 2 by the leg 5d, the unit is self-supporting. It is prevented that the chemical | medical solution in 5 leaks outside.

  In addition, depending on the water quality state evaluated by the water quality inspection means, the above-mentioned unit may supply new supply water to the cooling water, or open and close a drain valve (not shown) provided in the lower water tank to Other mechanisms necessary for the cooling tower A, such as blow control means for performing general drainage (blowing), may be provided, and such a case is also included in the present invention.

  According to the cooling tower of the present invention, it is a space-saving cooling tower with excellent maintainability such as chemical exchange, so that it can be widely applied to the cooling tower field in which chemical liquid is injected into cooling water.

(A) It is a front view of the side of the ladder 1 installation side of the cooling tower A. (B) It is a side view of the right side of the cooling tower A. FIG. (A) It is sectional drawing in the cross section containing the chemical | medical solution tank 5 seen from the front. (B) It is sectional drawing seen from the cooling tower A right side in the cross section containing the chemical | medical solution tank 5. FIG. It is a figure which shows the state by which the chemical | medical solution tank 5, the chemical | medical solution pump 6, and the control part 7 were unitized. (A) is a top view. (B) It is sectional drawing in LL of Fig.3 (a). (C) It is a front view.

Explanation of symbols

A Cooling tower according to the present invention 1 Ladder 2 Cooling tower body 2a Inlet 2b Fan 2c Lower water tank 2d Filler 2f Sprinkling part 2g Ventilation space part 2h Venting wall part 5 Chemical liquid tank 5a Liquid level gauge 5b Minimum part 5b1 Liquid outlet 5e Note Inlet 6 Chemical pump 6a Suction pipe 7 Control part of water quality inspection means

Claims (3)

In a cooling tower having a fan in the upper part, a lower water tank in the lower part, and a ventilation space for guiding an air flow to the fan below the fan and above the lower water tank,
A cooling tower provided with a chemical tank for water treatment in the ventilation space ,
A part of the chemical tank protrudes from the outer surface of the cooling tower and a chemical liquid inlet is provided at the upper part of the protruding part, and
The chemical solution tank is unitized with a pump for adding the chemical solution in the chemical solution tank to the cooling water system water having the cooling tower, and a control unit of a water quality inspection means for checking the water quality of the aqueous system. Is detachably installed in the cooling tower. The minimum part of the said chemical | medical solution tank is located outside the said cooling tower, and the liquid draining port for discharging | emitting the chemical | medical solution in this chemical | medical solution tank is provided in this lowest part. Cooling tower. The cooling tower according to claim 1 or 2 , wherein a liquid level gauge indicating a liquid level of the chemical tank is provided outside the cooling tower.

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