JPS5828516B2 - Fukusuuno netsukoukankinouosonaetareikyakutou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling tower in which a single cooling tower has multiple cooling functions.

Conventionally, as a cooling tower capable of cooling two systems of fluids with one cooling tower, there are a closed type evaporative cooling tower and a cooling tower described in Japanese Patent Application No. 1984-19484 filed by the same applicant.

However, in closed type evaporative cooling towers, the cooling coil section for cooling the process fluid is arranged so that it is in contact with the circulating water sprinkler and the outside air. of outside air must be taken in, and therefore the required power inevitably increases.

In addition, since the cooling coil must be suspended or supported in the upper stage of the tower, it is difficult to install it inside the tower in a way that does not reduce the heat exchange efficiency. Special consideration must be given to the support structure of the cooling coil section.

Since the main purpose of this closed type evaporative cooling tower is to cool the process fluid flowing through the cooling coil, there is a natural limit to the cooling of circulating water, and if you try to improve the cooling function of both, the site area will be limited. It is large and has a lot of power.

Japanese Patent Application No. 50-19484 makes the circulating water circulation route of such a closed type evaporative cooling tower function as an open type cooling route,
A heat load is inserted into this open type cooling path, and cooling of the process fluid flowing through the cooling coil section and cooling of the circulating spray water are balanced, thereby performing two systems of cooling.

However, this method also has the same problem as the above because the cooling coil section comes into contact with water spray and outside air, and requires a high degree of technical skill in designing, implementing, maintaining, piping, etc. of the cooling coil section.

The present invention solves these problems by disposing a cooling coil in the lower water tank of a normal open-type cooling tower, such as a counter-current type or a cross-flow type, in which circulating water is cooled by bringing it into contact with suctioned outside air in a packed layer, etc. The present invention provides a cooling tower having a two-system cooling function, characterized in that the cooling coil section cools fluids of different systems.

To explain specifically according to the embodiment shown in the attached drawings, the first
The figure shows an example in which the present invention is applied to a countercurrent cooling tower, in which cooling water from an air conditioner or other circulation route having a heat load 1 is sprinkled from a water sprinkler 2 to a packed layer 3. The air is brought into contact with the outside air sucked in by the drive of the blower 4 in a countercurrent manner,
The cooled sprinkled water stays in the lower water tank 5.

The amount of cooling water flowing into the lower water tank 5 is kept almost constant by adjusting the blowdown water and makeup water by the operation of a float (not shown) and by adjusting the control valve γ installed in the bypass pipe 6 of the heat load 1. is maintained.

Note that 8 in the figure indicates an eliminator 9 which is a circulation pump.

In such an open-type cooling tower that cools the circulating water by bringing it into contact with the suction outside air, the cooling coil 10 for cooling a fluid in a separate system from the circulating water is installed in the lower water tank 5 of the cooling tower.
Placed within.

A fluid having a heat load 11 independent of the heat load 1 is circulated in the cooling coil 10 for cooling.

Therefore, piping is provided independent of the open circulation path, and a closed path including the circulation pump 12 and the control valve 13 is formed.

Since this sealed path does not exchange heat with the outside air, there is no risk of contamination of the surrounding environment even with liquids or salt water containing heavy metals, organic compounds, etc.

Therefore, for example, in a factory or the like having a heat load 1 for air conditioning, when chemical equipment or other equipment needs to be cooled, this can be suitably cooled as the heat load 11 in this cooling tower.

In addition, in order to maintain a heat balance with the heat load 11 according to the change in the outside air wet bulb temperature depending on the season and the change in the size of the heat load 1, the control valves γ and 13 are adjusted to the optimal conditions to maintain the texture. Able to perform detailed driving.

FIG. 2 shows a cross-sectional view of the arrangement of baffle plates 14 for regulating the flow of cooling water in the lower water tank 5. As shown in FIG.

That is, when the sprinkled water falling into the lower water tank 5 is sucked into the suction pipe 15, the baffle plate 14 forms a flow pattern that increases the contact efficiency with the cooling coil 10 and improves the heat transfer efficiency.

In FIG. 2, the surface cooling water is first guided by a horizontal plate 16 with an inclination at the point farthest from the suction pipe, and then the cooling water is directed upward and downward by vertical baffle plates 14 forming a plurality of weirs. An example is shown in which the guide is guided toward the suction tube 15 while meandering.

These baffle plates 14 and 16 allow uniform contact with fast-flowing cooling water on the surface of the cooling coil, greatly improving heat transfer efficiency, and also allowing heat to escape to the water suction pipe 15 without contacting the cooling coil 10. Since water and stagnant water areas (dead areas) that do not substantially contribute to heat exchange can be prevented, the heat amount of the entire cooling water can be efficiently transferred to the fluid in the cooling coil 10.

The baffle plates 14 and 16 can serve as support members for supporting the cooling coil 10.

The cooling coil (
This is extremely useful when installing a surpain tensile coil, and facilitates assembly of the cooling coil 10, as well as making the installed structure stable and capable of withstanding long-term use.

As described above, the cooling tower of the present invention has a configuration in which cooling coils are disposed in the lower water tank of the open type cooling tower, so that the cooling function of multiple systems can be operated. This is liquid-liquid heat exchange, which is very efficient, and it is easy to adjust the heat balance between both systems.

Therefore, for example, if there is a closed system heat load in addition to an open system heat load, it is possible to use an existing or a new open type cooling tower for both purposes, without having to construct a new closed type cooling equalization tower. It is possible to reduce the area, etc.

[Brief explanation of the drawing]

FIG. 1 is a structural and layout diagram of a cooling tower showing an embodiment of the present invention, and FIG. 2 is a sectional view of the lower water tank of the cooling tower. 2... Water sprinkler, 3... Filler, 5...
...Lower water tank, 10...Cooling coil 1
4.16...Baffle plate.

Claims (1)

[Scope of Claims] 1. In an open-type cooling tower that cools cooling water whose temperature has risen through heat load 1 by bringing it into contact with suctioned outside air, the above-mentioned heat load 1
A cooling device with multiple heat exchange functions characterized in that a cooling coil 10 for cooling a fluid of another system whose temperature has risen through a heat load 11 different from that of the cooling tower is disposed in a lower water tank 5 of a cooling tower. Tower. 2. In an open-type cooling tower that cools the cooling water that has been heated through heat load 1 by bringing it into contact with suction outside air, the above heat load 1
A cooling coil 10 for cooling the fluid of another system whose temperature has risen through a heat load 11 different from that of the cooling tower is disposed in the lower water tank 5 of the cooling tower, and in order to adjust the flow of cooling water in the lower water tank 5. A cooling tower with multiple heat exchange functions characterized by the arrangement of baffle plates.