JP2003130558A - Strainer attached to cooling tower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily removable and cleanable strainer for circulating cooling water used in a cooling tower. SOLUTION: This strainer attached to the cooling tower for collecting foreign matter mixed in the circulating cooling water is mounted on the side wall or a base plate of a water collecting tank connected and disposed under a lower water tank of the cooling tower without disposing a strainer in a piping route of the cooling tower. Any conical strainer with a handle and of 15 to 20 mesh will do as the strainer for collecting foreign matter mixed in the circulating cooling water. A slurry drain valve is fitted to a pipe communicating with the base plate of the water collecting tank. The foreign matter means dust and various dirts mixed in the circulating cooling water, fallen leaves and containment such as filler fragment in the tower as well. Thus, the strainer can be attached to the existing cooling tower and facilitate removal and cleaning work during the operation so that the operation efficiency of the cooling device can be remarkably improved.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a strainer attached to a cooling tower.

[0002]

2. Description of the Related Art Conventionally, since the cooling tower is exposed outdoors,
During operation, foreign matter such as dust, various kinds of dust, and fallen leaves, and debris from the packing in the tower are directly mixed into the circulating cooling water in the tower through the blower. Since these foreign substances damage pumps, refrigerators, etc. in the piping path, strainers are installed in the cooling tower and the circulating cooling water piping path respectively to remove them, and cleaning is often performed, but these measures are complicated. is there.

According to Japanese Patent Laid-Open No. 6-66493, as a typical example, a water collecting tank provided with a strainer having a coarse mesh of about 5 to 6 mesh is arranged under the lower water tank of the cooling tower, and a piping path is provided. A fine Y-shaped strainer with a mesh size of about 20 mesh is arranged in front of the pump to remove contaminants. In this case, since contaminants adhere to each strainer after the lapse of the period, these strainers need to be cleaned and removed. However, since the Y-type strainer is in the middle of the circulating cooling water piping, it is necessary to stop the operation of the cooling tower and drain the water inside the piping when cleaning this, and the cost of replenishment and cleaning water cannot be ignored. . In a cold region, the heat insulating material and the electric heater are wound around the piping for circulating cooling water and the Y-shaped strainer, so that the attachment / detachment work is not easy.

The Y type strainer is a general JIS standard 20.
Even 0A is expensive, about 90,000 yen per piece, and is large in size, so there is a problem that the Y-type strainer cannot be installed unless the cooling tower itself is installed in a high place. When cleaning it, monitor the pipe differential pressure before and after the Y strainer,
Although the mold strainer is removed from the pipe for circulating cooling water, it requires a great deal of labor to remove it from the pipe due to its large weight, and its cleaning work is not easy. A sluice valve and a check valve must be installed in advance for cleaning.When stopping the operation of a cooling tower, if multiple cooling towers share the same pipe, operate the other cooling towers that are in operation. This kind of cooling tower is difficult to be used in this field, because it must be stopped, and the resulting air conditioning failure can have a great impact on semiconductor production and the like.

[0005]

SUMMARY OF THE INVENTION In order to solve the various problems described above, the present invention performs filtration cleaning of circulating cooling water used in a cooling tower with an inexpensive strainer, and also removes and cleans it. Is meant to be easy.

[0006]

Here, the present inventor has installed a strainer in the piping path of the cooling tower and installed it on the side wall or bottom plate of the water collecting tank connected under the lower water tank of the cooling tower to circulate the water. We came to find a strainer attached to the cooling tower that collects foreign matter mixed in the cooling water.

The foreign matter here is a strainer having a coarse mesh of about 5 to 6 mesh, which is conventionally arranged in a water collecting tank connected below the lower water tank of the cooling tower, or is arranged at a position upstream of the pump in the piping path. In addition to foreign matter such as dust, various kinds of dust, and fallen leaves, which are removed by a Y-shaped strainer with a fine mesh of about 20 mesh, contaminants such as packing debris in the tower are used.

As a result, it was found that a strainer having a cone-shaped 15-20 mesh with a handle is sufficient.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the lower water tank 2 of the cooling tower 1 is arranged without disposing a strainer in the piping path of the cooling tower 1.
The strainer 4 attached to the cooling tower for collecting foreign matters mixed in the circulating cooling water is attached to the side wall or the bottom plate of the water collecting tank 3 which is connected to the bottom of the cooling water. When the strainer 4 is arranged on the side wall of the water collection tank 3 (FIG. 1), the circulating cooling water flows through the horizontal pipe as it is, and when the strainer 4 is arranged on the bottom plate of the water collection tank 3 ( In Fig. 2), the circulating cooling water flows in the horizontal pipe of the horizontal T-shaped pipe.

Although the former case seems appropriate,
As shown in FIG. 3, in each case, the strainer 4 has 15
Use it with a handle attached to a cone-shaped mesh of ~ 20 mesh. The strainer 4 is a strainer of a D type or the like, which is appropriately selected and used from the strainers used in other fields as a temporary strainer. A flange having a diameter larger than that of the pipe is attached to the periphery of the opening so as not to sink into the pipe, and the water pressure of the water collecting tank 3 prevents the flange from dropping from the mounting position.
The strainer 4 can be freely attached and detached, and the cooling tower 1 can be used even during operation.
Located 50 mm above the water surface of the lower water tank 2 of
It can be performed by opening a door (not shown) having an inspection hole of about 00 mm × 600 mm. Cleaning the strainer 4 is easy and does not take time, but it may be replaced with a clean one and used alternately.

[0011] Generally, the drainage valve 12 is provided in the pipe leading to the lower water tank of the cooling tower, and the drainage valve 12 is also provided in the pipe in the load 11 for the original purpose and muddy water. Is also excluded. In this respect, also in the present invention, the muddy water draining valve 6 equivalent to the water draining valve 12 is attached to the pipe leading to the bottom plate of the water collecting tank which is connected below the lower water tank of the cooling tower. The muddy water drawing valve 6 is a ball valve or the like, and when the strainer 4 is mounted on the side wall of the water collection tank 3 (FIG. 1), it is installed in the pipe directly below the bottom plate of the water collection tank 3, and the strainer 4 is the bottom plate of the water collection tank 3. If it is attached to the horizontal pipe (Fig. 2), connect it to the downward pipes of the horizontal T-pipe. The muddy water drawing valve 6 is continuously opened when the strainer 4 is taken out, and the circulating cooling water is kept clean except for the remaining muddy water, if any.

A strainer 4 is attached to the bottom plate of the water collecting tank 3 of the cooling tower 1.
Fig. 4 shows an example of piping when the muffler is attached and the muddy water extraction valve 6 is attached. Make-up water 7 for cooling tower 1
Supply line and overflow and drain 8 lines. Further, a check valve 10 is provided on the discharge side of the pump 9, and a drainage valve 12 is provided in the pipe at the load 11.

[0013]

The strainer attached to the cooling tower according to the present invention can be attached to an existing cooling tower, and can be taken out and cleaned very easily during operation, so that the operation efficiency of the cooling device is significantly improved. .

[Brief description of drawings]

FIG. 1 is an explanatory view showing a state in which a strainer is attached to a side plate of a water collection tank.

FIG. 2 is an explanatory view showing a state where a strainer is attached to the bottom plate of the water collection tank.

[Figure 3] External view of the strainer

FIG. 4 is a schematic explanatory view showing a cooling tower and piping for circulating cooling water depending on the mounting position of the strainer in FIG.

[Explanation of symbols]

1 cooling tower 2 Lower tank 3 water collection tanks 4 strainers 5 handles 6 Muddy water extraction valve 7 Make-up water 8 overflow and drain 9 pumps 10 Check valve 11 load 12 Water drain valve

Claims (2)

[Claims] 1. A foreign matter mixed in circulating cooling water is attached to a side wall or a bottom plate of a water collecting tank connected under a lower water tank of the cooling tower without disposing a strainer in a piping path of the cooling tower. Strainer attached to the cooling tower. 2. The strainer attached to the cooling tower according to claim 1, wherein the strainer has a cone shape with a handle and has a size of 15 to 20 mesh.