JP2008121967A - Chemical solution tank for cooling tower, chemical solution adding unit for cooling tower, and cooling tower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chemical solution tank for a cooling tower excelling in maintainability of chemical solution replacement or the like while saving on a space, the most suitable for arrangement in a ventilating space, and having a high cooling effect without disturbing an air current in the ventilating space, and to provide a chemical solution adding unit equipped with such a chemical solution tank for the cooling tower. <P>SOLUTION: The chemical solution tank for the cooling tower is installed in the ventilating space of the cooling tower having a fan at an upper part, a lower water tank at a lower part, a ventilating part on a side face to lead in air from the outside, a water cooling part inside the ventilating part to bring air led in from the ventilating part into contact with water, and the ventilating space below the fan and above the lower water tank to lead air from the water cooling part, to the fan. The chemical solution tank for the cooling tower has a surface shape not disturbing an air current flowing toward the fan from the water cooling part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a chemical tower for a cooling tower for adding a chemical to a cooling tower water system for circulating and supplying cooling water used in a refrigerator, a cold / hot water machine, a heat exchanger for various processes, and such a cooling tower. The present invention relates to a chemical liquid addition unit including a chemical liquid tank and a cooling tower including a chemical liquid addition unit for a cooling tower.

  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

  The present invention improves the above-mentioned conventional problems, that is, it is possible to provide a chemical tank for a cooling tower that is excellent in maintainability such as chemical liquid exchange while being space-saving, and is optimal for being placed in a ventilation space. It is an object of the present invention to provide a chemical solution tank, a chemical solution addition unit including such a chemical solution tank for a cooling tower, and a cooling tower having such a chemical solution addition unit and having a high cooling effect while saving space.

  In order to solve the above problems, the chemical tank for a cooling tower according to the present invention has a fan at the upper part, a lower water tank at the lower part, a ventilation part for introducing air from the outside to the side surface, A water cooling section for bringing the air introduced into the interior from the ventilation section into contact with water, and a ventilation space for guiding the air from the water cooling section to the fan below the fan and above the lower water tank A cooling tower chemical liquid tank installed in the ventilation space of the cooling tower having a surface shape that does not obstruct airflow from the water cooling section toward the fan.

  In order to solve the above problems, a chemical tank for a cooling tower according to the present invention has a fan at the upper part, a lower water tank at the lower part, a ventilation part for introducing air from the outside to the side surface, A water cooling section for bringing the air introduced into the interior from the ventilation section into contact with water, and a ventilation space for guiding the air from the water cooling section to the fan below the fan and above the lower water tank A cooling tower chemical solution tank installed in the ventilation space of the cooling tower, wherein the cooling tower chemical solution tank is substantially box-shaped, and an angle formed between the surface of the box-shaped water cooling section and the upper surface It is a chemical tank for cooling towers, which is characterized by having a part cut off.

  The cooling tower chemical solution addition unit according to the present invention comprises a cooling tower chemical solution tank according to claim 1 or 2 and a chemical solution injection device for injecting a chemical solution into a cooling water system. A cooling tower chemical addition unit characterized by comprising the cooling tower.

  As described in claim 4, the cooling tower of the present invention is a cooling tower comprising the cooling tower chemical addition unit described in claim 3 in a detachable manner.

  According to the chemical tower for cooling tower of the present invention, the above configuration enables a chemical tank for cooling tower excellent in maintainability such as chemical exchange while being space-saving, and is optimal for being arranged in the ventilation space. It becomes a simple chemical tank.

  The chemical solution addition unit of the present invention includes the above-described excellent chemical solution tank and a chemical solution injection device for injecting the chemical solution into the cooling water system, and is unitized. It becomes easy to attach to and easy to manufacture and maintain.

  Since the cooling tower of the present invention has the chemical solution addition unit as described above, it is a cooling tower that is excellent in maintenance properties such as chemical solution exchange and has a high cooling effect while saving space.

  FIG. 1 includes a fan at the upper part, a lower water tank at the lower part, a ventilation part for introducing air from the outside to the side surface, a water cooling part for bringing the air and water introduced from the ventilation part into contact with the inside of the ventilation part, and A chemical solution injection device for injecting a chemical solution into a cooling tower chemical solution tank and a cooling water system into a ventilation space for guiding the air from the water cooling unit to the fan below the fan and above the lower water tank; The cooling tower provided with the chemical | medical solution addition unit for cooling towers equipped with this is shown in model.

  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 ′ 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. . FIGS. 3A to 3C are diagrams showing an example of a cooling tower chemical solution addition unit in which the chemical solution tank 5 ′, the chemical solution pump 6 ′, and the control unit 7 ′ of the water quality inspection means are unitized. 3A is a top view, FIG. 3B is a cross-sectional view taken along 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. Part 2f (in this example, this filler layer part 2d constitutes a water cooling part for bringing air introduced into the cooling tower into the cooling tower from a ventilation part to be described later inside the ventilation part, and further the center of the cooling tower body 2 Between the two left and right fillers 2d, there is a ventilation space 2g for guiding the airflow that has passed through these fillers 2d to the fan 2b.

  That is, the airflow introduced from the ventilation portion 2h provided on the left and right walls of the cooling tower main body 2 (the ventilation portion for introducing air from the outside provided on the side surface of the cooling tower) into the ventilation space 2g passes through the inside of the filler 2d. It flows through 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.

  Here, the chemical tank 5 ′ may be installed so that a part of the chemical tank 5 ′ is lower than the coolant level. In this case, the lowest part of the chemical 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. 3 (a) to 3 (c), the chemical liquid tank 5 ′ is used for cooling the chemical liquid 10 ′ in the chemical liquid tank 5 ′ with cooling water from a cooling tower A (or a cooling water system having the cooling tower A). It is united with a pump 6 ′ added to the control unit and a control unit 7 ′ of water quality inspection means for checking the quality of the cooling water, and the unit is detachably installed on the front wall portion of the cooling tower body 2 .

  The chemical liquid tank 5 ′ is made of polyethylene in this example, and the chemical liquid tank 5 ′ has a lid on the upper portion (upper end portion in this example) of the portion (protruding portion) protruding from the outer surface of the cooling tower body 2 of the chemical liquid tank 5 ′. The lower portion of the protruding portion of the injection port 5e ′ is the lowest part (5b ′) in the chemical tank 5 ′, and the lowest part 5b ′ includes the chemical solution 10 in the chemical tank 5 ′. And a drainage port 5b1 ′ with a lid for discharging washing water at the time of washing. 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 chemical solution tank 5 ′. Can be used to the maximum extent possible, and since the liquid drain port 5b1 'is provided at the lowest part of the chemical tank 5', it is easy to change and clean the type of the chemical liquid, and the liquid drain port Since there is a sufficient space below 5b1 ', the drainage can be easily recovered without draining or draining the interior.

  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 height of the chemical liquid 10 ′ in the chemical liquid tank 5 ′ is provided in the concave portion. ing. As described above, since the liquid level gauge 5a 'is provided outside the cooling tower body 2, it is easy to check the internal volume of the chemical solution 10'. Furthermore, 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.

  In the unlikely event that the liquid level gauge 5a ′ is cracked or leaks from above and below, the liquid level gauge 5a ′ is located outside the cooling tower body 2, so that the chemical solution 10 The accident that 'is poured into the cooling water of the cooling tower body 2 at a high concentration is prevented in advance.

  A pump 6 'as a chemical solution injection device for injecting a chemical solution into the cooling water system 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, and the chemical solution tank 5'. There is a suction pipe 6a 'inside, and the suction pipe 6a' reaches near the bottom of the chemical liquid tank 5 '. 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, in this example, the chemical addition unit is provided with a control unit 7 ′ for 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 '. It is provided at a position in contact with the cooling water, and is electrically connected to the control unit 7 ′ by an electric wire or a cord. Sensitivity adjustment of the sensor unit is performed by the control unit 7 ′.

  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.

  As described above, since the chemical addition unit is detachably installed on the front wall portion of the cooling tower body 2, it is possible to save the trouble of installation of individual devices, piping and wiring, and in the event of failure of the unit mechanism. When this occurs, it is possible to replace the unit as a whole.

  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. You may make it provide the above-mentioned unit or chemical | medical solution tank 5 '.

  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. The chemical solution in the chemical solution tank 5 ′ is prevented from leaking outside.

  In the cooling tower A, the chemical tank 5 'is installed below the ventilation space 2g, that is, above the liquid level of the lower water tank 2c so as not to obstruct the airflow in the ventilation space 2g.

  However, even with such measures, the airflow in the ventilation space 2g may be hindered and the cooling efficiency of the cooling tower A may be reduced. In particular, when a small chemical cooling tower is provided with a large chemical tank, the air flow in the water cooling section becomes non-uniform, and the concern about a decrease in cooling efficiency increases.

  In such a case, the cooling tower chemical solution tank has a surface shape that does not hinder the airflow from the water cooling section toward the fan, thereby eliminating the possibility of hindering the airflow in the ventilation space 2g and preventing the cooling efficiency from being lowered. be able to.

  FIG. 4 shows a perspective view of an example 5 of the cooling tower chemical liquid tank according to the present invention having a surface shape that does not obstruct the airflow from the water cooling section toward the fan.

  The cooling tower chemical liquid tank 5 has a substantially box shape, but is roughly divided into a panel side part 5A located outside when set in the cooling tower as a unit and a tank part 5B of the ventilation space 2g of the cooling tower. Is done.

  Here, the cooling tank chemical solution tank 5 is installed so that the right front side in FIG. 4 faces the water cooling section of the cooling tower, but the water cooling section side surface 5h and the upper surface 5i of the box-shaped tank section 5B As a result, a surface shape 5j (upwardly convex curved surface) that does not hinder the air flow from the water cooling portion of the cooling tower to the fan is formed. Therefore, the entire water cooling section is uniformly ventilated, and as a result, the cooling effect of the cooling tower is ensured.

  The tank part 5B has three rim parts 5f for increasing the rigidity of the tank 5B itself, and the bottom part of the rim part 5f is fixed to a frame (not shown) of the cooling tower body using bolts and nuts. A fixing portion 5f1 is provided.

  On the other hand, the panel side 5A has an inlet 5e for injecting a chemical into the cooling tower chemical tank 5 at the top, and a liquid outlet 5b1 (also serving as a suction valve fixing part, which will be described later) near the bottom. In this way, the suction pipe 6a of the chemical pump 6 is connected).

  The cooling tower chemical solution addition unit including the cooling tower chemical solution tank 5 according to the present invention, the cooling tower chemical solution tank and the chemical solution injection device for injecting the chemical solution into the cooling water system on the panel side portion 5A. 8 is a front view of the panel side portion 5A.

  In addition to the inlet 5e and the liquid outlet 5b1 of the cooling tower chemical liquid tank 5, the cooling tower chemical liquid addition unit 8 includes a liquid level gauge 5a, a chemical liquid pump 6 (as a chemical liquid injection device), a suction pipe 6a, A control unit 7 is provided. The control unit 7 in this example performs a water quality inspection of the cooling water system by a sensor (not shown), and controls the water quality of the cooling water to be maintained within a predetermined range by blowing the cooling water based on the result. According to the timer mechanism attached to the control unit 7 or according to the replenishment water amount detecting means (not shown) for detecting the replenishment water amount replenished to the cooling water system, the chemical liquid in the cooling tower chemical liquid tank 5 is detected. The chemical pump 6 is controlled so as to be added to the cooling water system from the suction pipe 6a through a pipe (not shown).

  The results of examining the influence of the airflow in the ventilation space 2g when the cooling tower chemical solution addition unit 8 is incorporated in the cooling tower will be described.

  6A is a left side view of the cooling tower chemical liquid addition unit 8 according to the present invention incorporated in the cooling tower A, FIG. 6B is a top view, and FIG. 6C is a right side view. As shown in these figures, wind speed measurement points 1 to 12 (indicated by circled numbers in the figure) were set in the ventilation space 2g, and the wind speeds at these measurement points during cooling tower operation were measured. The results are shown in Table 1 as examples.

  In addition, for comparison, a cooling chemical liquid tank 5 (having a corner portion indicated by a two-dot chain line 5g) in which a corner portion formed by the surface 5h on the water cooling portion side and the upper surface 5i of the box-shaped tank portion 5B is not cut. The cooling tower chemical solution addition unit equipped with the above was also incorporated in the cooling tower in the same manner, and the wind speed at the measurement points 1 to 3 in the ventilation space 2g at that time was measured. The results are shown in Table 1 as comparative examples.

  According to Table 1, when the cooling chemical solution tank according to the comparative example is used, the air volume drop at the measurement point 1 and the measurement point 2 is large, but when the cooling chemical solution tank 5 according to the present invention is used, It can be seen that a decrease in air volume at these locations is prevented. Thus, when there is no partial air volume variation in the ventilation space 2g, the cooling efficiency as a cooling tower is high and the performance is fully exhibited.

It is a model figure of a cooling tower provided with the chemical solution addition unit for cooling towers provided with the chemical solution injection device for inject | pouring a chemical solution into a cooling tower chemical solution tank and a cooling water system. It is a model figure which shows an example of the chemical | medical solution tank for cooling towers. It is a model figure which shows an example of the chemical | medical solution addition unit for cooling towers unitized. It is a model perspective view which shows the chemical | medical solution tank 5 for cooling towers which has a surface shape which does not prevent the airflow which goes to the said fan from a water cooling part. It is a model front view of the chemical solution addition unit 8 for cooling towers concerning this invention provided with the chemical solution tank 5 for cooling towers concerning the said invention, and the chemical solution injection apparatus for inject | pouring a chemical solution to a cooling water system. It is a model figure for demonstrating the position of the wind speed measurement points 1-12 provided in the ventilation space. (A) It is a left view. (B) It is a top view. (C) It is a right view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Evaporation part A Cooling tower 1 Ladder 2 Cooling tower main body 2a Inlet 2b Fan 2c Lower water tank 2d Filler 2f Sprinkling part 2g Ventilation space 2h Ventilation part 5 Chemical liquid tank 5a Liquid level gauge 5b1 Liquid outlet 5e Inlet 6a Suction pipe 6 Chemical liquid injection equipment (chemical liquid pump)
6a Suction pipe 7 Control unit 8 Cooling tower chemical addition unit

Claims (4)

A fan in the upper part, a lower water tank in the lower part, a ventilation part for introducing air from the outside to the side surface, a water cooling part for bringing the air introduced into the inside from the ventilation part into contact with water inside the ventilation part, and the lower part of the fan And a cooling tower chemical solution tank installed in the ventilation space of the cooling tower having a ventilation space for guiding the air from the water cooling unit to the fan above the lower water tank,
A chemical tank for a cooling tower having a surface shape that does not obstruct an air flow from the water cooling section toward the fan. A fan in the upper part, a lower water tank in the lower part, a ventilation part for introducing air from the outside to the side surface, a water cooling part for bringing the air introduced into the inside from the ventilation part into contact with water inside the ventilation part, and the lower part of the fan And a cooling tower chemical solution tank installed in the ventilation space of the cooling tower having a ventilation space for guiding the air from the water cooling unit to the fan above the lower water tank,
The cooling tower chemical tank is substantially box-shaped, and the corner formed by the box-shaped surface on the water cooling section side and the upper surface is cut off. Chemical tank.   3. A cooling tower chemical solution addition unit comprising the cooling tower chemical solution tank according to claim 1 and a chemical solution injection device for injecting a chemical solution into a cooling water system.   A cooling tower comprising the cooling tower chemical addition unit according to claim 3 detachably.

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