JPH0118229Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cooling tower. More specifically, the present invention provides anti-corrosive,
This invention relates to a cooling tower equipped with a formulation container that releases an appropriate amount of an aqueous liquid formulation for scale prevention, algae prevention, etc.

Conventionally, cooling water for cooling towers has been treated with anti-corrosion,
Methods for adding anti-scaling, anti-algae, etc. preparations include adding solid preparations to cooling water and gradually dissolving them, and adding a container filled with liquid preparations to a small part of the container by submerging them in cooling water. Methods are known for releasing liquid formulations from pores.

For example, Japanese Patent Application Laid-open No. 75185/1985 discloses a drug container for implementing the latter method, which has a drug loading port at one end of a spherical shell and a predetermined number of small holes for drug release on the upper surface of the shell. , discloses a water treatment formulation container having a built-in container. However, as this container freely swings or rotates in running water, water enters through the small hole and releases the preparation, so that the water and the preparation mix in the container, and the preparation is absorbed by the water. Gradually, the concentration of the drug in the container decreases due to dilution. As a result, even if the formulation is discharged from the container at a constant rate, the concentration of the formulation (medicinal ingredient) in the flowing water cannot be maintained constant, resulting in a disadvantage that the purpose of water treatment cannot be fully achieved.

In addition, Japanese Utility Model Publication No. 57-10795 discloses that the lower half of the spherical container is constructed to have a higher specific gravity than the upper half,
A microhole is provided in the lower half of the container, and a chemical solution is sealed in the container, and when the container is floated on the water surface or in water, the lower half, which has a higher specific gravity, faces downward and contacts the water through the micropore. A chemical solution container configured to release a chemical solution into water is disclosed, but when this container is used in a cooling tower, the container swings due to the flow force, and the water to be treated flows into the container. In the case of infiltration, the preparation is gradually diluted by the water, and there is a disadvantage that the concentration of the preparation (medicinal ingredient) in the flowing water cannot be maintained constant as in the invention described in the above-mentioned publication.

The present inventors developed a water-soluble preparation with a specific gravity of 1.3 (specifically, a 30% calcium chloride aqueous solution, but with a specific gravity of 0.005
A small hole of approximately 0.5 mm was made in the bottom of a container containing %bromophenol blue (colored with bromophenol blue), and the results of observing the movement of water and the preparation by immersing it in water revealed that the preparation in the container leaked through the small hole. However, to replace the leakage of the formulation, water infiltrates through the small holes, and at this time, the infiltrated water hardly mixes with the formulation, creating a narrow path through the formulation layer and reaching the upper layer. It was observed that when the amount of infiltrated water increased, the water formed a layer on the top of the formulation. Thus, the inventors of the present invention came up with the idea that such a phenomenon could be used to constantly release (add) the formulation into the water without diluting it, and created a container for water treatment formulations and one that does not have the drawbacks of conventional containers. This led to a concrete proposal for a means for attaching the container to the cooling tower body.

That is, the specific configuration of the present invention is that a water sprinkling mechanism and a water tank to be treated are provided above and below the gas-liquid contact filler, and the water to be treated in the tank is circulated and supplied to the water sprinkling mechanism via a pump and a heat exchanger. A cooling tower main body, and a sealed container that can be filled with an aqueous liquid preparation for water treatment, a part of which has a filling opening for the preparation, and a bottom part of which has a cooling tower body that allows the water to be treated to rise up through the preparation in the sealed container. and a sealed container each having one or more small holes capable of releasing the formulation into the water to be treated at a substantially constant rate, and the sealed containers are removably fixed at a predetermined position in the water of the water tank to be treated in the main body of the cooling tower. A cooling tower consisting of container fixing means.

In short, the present invention fixes the container by submerging it almost vertically into the water of the water tank to be treated in the cooling tower.
By providing a specific small hole at the bottom of the container in this state, the entire amount of the preparation can be added to the water of the water tank to be treated without diluting it, and the small hole can be closed at the bottom of the water system to be treated. This is to more reliably ensure uniform addition of the entire amount of the above-mentioned preparation.

In the present invention, as the container fixing means for removably settling and fixing the container body at a predetermined position in the water to be treated, specifically, the means shown in FIG. 2 or FIGS. 7 to 11 are preferred.

First, a preferred example of the cooling tower of the present invention will be explained with reference to FIGS. 1 to 5. A magnet body 12 as a locking part is fixed to the outer wall of the storage water tank 7 of the cooling tower body C, and the magnetic force of the magnet body The flat surface 1' of the sealed container body 1 is attached to the inner wall. This sealed container 1 is provided with a charging port 2 for charging a water treatment preparation at an appropriate location, and a small hole 3 for releasing a preparation of an appropriate diameter at the lowermost part of the container in a suspended state.

The shape of this container can be selected from any structure such as a columnar shape (cube or rectangular parallelepiped) or a flat plate shape. However, when the container body in the above preferred example is suspended from the water wall to be treated by magnetic force, fluid force is used. It is preferable to have an oblique surface 1' that does not rotate when stretched.

The material of the container may be metal or plastic as long as it will not be affected chemically or physically, such as deterioration or dissolution when containing water treatment preparations such as anti-corrosion agents, anti-scaling agents, or anti-algae agents. The container may be made of aluminum or wood, and when carrying out water treatment, when the preparation is charged into this container and suspended in cooling water, the container will be held almost vertically without shaking significantly in the flowing water. It is desirable to use a heavy material that can maintain the state of sedimentation, and in particular, a material with a higher specific gravity than water is preferred. Of course, in the above example, if the sealed container is made of non-magnetic material such as plastic or wood, it is necessary to separately attach a magnetic material. Further, the preparation inlet may be provided at any location in the container, but it is constructed so that the preparation containing liquid is maintained in a sealed state.

The container has one or more small holes, through which the preparation and water can leak out and enter at the same time,
Therefore, by providing a small hole at the bottom of the container when it is placed in water, it is used to allow almost all of the drug to leak out, but the size of the small hole is determined by the amount of drug contained and It is not possible to uniformly determine the desired concentration of the formulation in the water, which is determined from the performance for the purpose of water treatment and the amount of water used.

However, what is particularly important in determining the pore size is that the amount of water that enters the container is too small to be easily compatible with the formulation, and that the rapid intrusion of large amounts of water may cause the water to mix with the formulation. It is necessary to determine within the following range where the interface is not disturbed, and approximately
A hole with a diameter of 0.1 to 1.0 mm is desirable, and it is preferable to make the hole at the bottom of the container so that almost all of the contained preparation can be released into the water. The small holes may be punctured with needle-like protrusions when used stationary in water, or may be pre-drilled, but in that case, the holes should be sealed before containing the preparation.

In a preferred example, the magnetic body must have sufficient magnetic force so that the small hole is located at the bottom of the container when the container is suspended in water, and the small hole is always maintained at an appropriate distance from the bottom of the water system. There is.

The aqueous liquid preparations to be charged into the above water treatment preparation containers include anticorrosive agents such as an aqueous solution of sodium hexametaphosphate, antiscalants such as an aqueous solution of sodium polyacrylate, and antialgae agents such as an aqueous solution of quaternary ammonium acid. Agents and the like are preferred. Further, the specific gravity of these materials is preferably 1.05 or more.

Thus, the water treatment formulation container described above can be effectively used for the intended purpose in the cooling tower C. To explain the cooling tower in more detail, as shown in FIG. The open cooling tower main body 6, which is equipped with a circulating water inlet and a water sprinkling mechanism, connects to a pipe 10 provided through a storage water tank 7, a pump 8, and a heat exchanger 9. A circulating cooling water system is provided with a water supply pipe 11 for replenishing a portion of the blow amount of the service water. A container 1 containing at least one aqueous liquid preparation is suspended from a water wall by a magnet 12 and immersed therein. Immediately after immersion, the formulation contained in the container leaks or releases into the service water, and at the same time the service water enters the container. After the required time, which is empirically calculated from the amount of the preparation and the diameter of the small pore, to complete leakage of the preparation, the container is replaced with a separately prepared container containing the aqueous liquid preparation.

The effects of these water treatment formulation containers were tested using an experimental device that was scaled down from the cooling tower system in Figure 1, and the results shown in Figures 4 and 5 were obtained. Implementation of the exemplary system in a manner of use also allows the container to
It has been demonstrated that it has a remarkable practical effect industrially.

Incidentally, the preparation contained in this container in the experiment (sodium hexametaphosphate 10% (weight, same below),
85% concentration of H ₃ PO ₄ aqueous solution 15%, zinc chloride 5%,
100 g of anticorrosive agent (mixed with 70% water) had a specific gravity of 1.12, and 10 grams of tap water was stored and circulated while maintaining the amount of blow and replenishment water at 65 ml/min. The diameter of the small hole drilled in the bottom of the container was 0.6 mm, so the experiment was completed 7 days after the container was immersed.

As a result, the concentration of the formulation in tap water decreased after 12 hours.
The concentration reached 150 ppm and remained at approximately the same concentration for 6.5 days thereafter. As shown in Figure 4, on the 3rd day and 7.5
On the third day, I pulled up the container and observed the contents.
On the second day, the preparation and water were separated and formed almost two layers as shown in FIG. 41. On the 7.5th day,
As shown in FIG. 4, the entire amount of the preparation was replaced with tap water.

In place of the sealed container body 1 shown in FIG. 3, a sealed container main body 1a as shown in FIG. 6, which is different only in shape (rectangular parallelepiped), may be used.

Furthermore, the device of the sealed container main body to the storage water tank is installed in the seventh to
It is also possible to carry out the method as shown in FIG. That is, as shown in FIG. 7, the sealed container main body 1a
An engaging piece 14a integrally formed with the nut 15a may be tightened. Also, as shown in FIG. 8, the engaging piece 14
The bent portion 16b of b may be hooked to the upper edge 15b of the upper flange of the storage water tank 7b. Furthermore, as shown in FIG. 9, a mesh basket 17c may be installed on the inner wall of the water storage tank 7c, and the sealed container 1 may be placed in the mesh basket. 14d in FIG. 10 is an engagement piece, 15d is a locking piece, 14e in FIG. 11 is an engagement piece, and 15e is a water supply pipe to be treated.

[Brief explanation of the drawing]

Figures 1 and 2 are functional explanatory diagrams and enlarged views of essential parts showing an embodiment of the cooling tower of the present invention, Figure 3 is a perspective view of its sealed container, and Figures 4 and 5 are for confirming the effects of the container. FIG. 2 is an observation diagram and a graph showing the experimental results of FIG. FIG. 6 is a view corresponding to FIG. 3 showing another example of the container, and FIGS. 7 to 11 are views corresponding to FIG. 2 showing other embodiments. 1...Water treatment formulation container, 2...Charging port, 3...
...Small hole, C...Cooling tower, 6...Cooling tower body, 12...Magnet body.

Claims (1)

[Scope of utility model registration request] A water sprinkling mechanism and a water tank to be treated are provided above and below the gas-liquid contact filler, and the water to be treated in the tank is pumped.
It consists of a cooling tower main body that circulates and supplies water to a water sprinkling mechanism via a heat exchange part, and a sealed container that can be filled with an aqueous liquid preparation for water treatment, with a part of it having a filling opening for the preparation and a bottom part of it containing the water to be treated. A sealed container, each having one or more small holes that allows the liquid to rise in a single line through the formulation in the sealed container and release the formulation into the water to be treated at a substantially constant rate; and a container fixing means for removably fixing the container in a predetermined position underwater.