JPH0429263Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field to which the invention pertains] This invention is applied to a water spraying device in which a filler is loaded over the entire interior of a planar rectangular outer casing, and water to be cooled is sprayed onto the filler. The present invention relates to a rectangular counterflow type cooling tower in which a water sprinkler pipe is provided in the outer casing so as to be able to rotate around a vertical axis, and a blower is provided in an exhaust pipe attached to the outer casing above the water sprinkler device.

[Prior art and its problems]

In this type of rectangular countercurrent cooling tower, the sprinkler pipes move in a circular trajectory around the vertical axis, spraying the water to be cooled onto the filler filled in the planar square outer casing. However, while the water to be cooled is sufficiently sprayed onto the filler material located in the center of the outer casing, the water to be cooled does not reach the filler material located at the corners of the outer casing. There is very little cooling water flowing down over the surface.

In this state, the blower is activated to draw outside air into the outer casing, and while it is rising between the filling materials, the heat held by the water to be cooled is transferred to the outside air due to the latent heat effect caused by the contact between the water to be cooled and the outside air. At each corner of the outer casing, the outside air comes into contact with the water to be cooled and has a heat exchange effect. Compared to the airflow that rises over the filler in the center of the outer casing, the airflow tends to be drawn toward the exhaust stack by the blower under no load without any resistance from the cooled water, and the filler in this non-sprinkled area The volume reaches approximately 20% of the total volume, which hinders the improvement of the heat exchange efficiency of square cooling towers.

Such a problem also occurs in a countercurrent type cooling tower in which, in addition to the above-mentioned filler, a lower filler is further filled facing the outside air intake port.

In order to eliminate the non-sprinkled area, a water sprinkling device is described in Japanese Utility Model Publication No. 59-23994, in which fixed water sprinkling pipes are arranged radially above or below a rotary water sprinkling pipe.

However, since the fixed sprinkler pipes in this publication are radially installed across the exhaust port, similar to the rotary sprinkler pipes, ventilation resistance increases.

The purpose of this invention was to supply water to be cooled to all of the filling materials, to facilitate the modification of rectangular countercurrent cooling towers in order to increase the heat exchange efficiency, and to make it possible to easily renovate rectangular countercurrent cooling towers without increasing ventilation resistance. It is an object of the present invention to provide a piping unit for a water sprinkler that can spray water evenly.

(Means for Solving the Problems) In order to solve the above-mentioned problems, this invention has a structure with a depth at the top of a short cylindrical frame of a flat rectangular shape that corresponds to the planar shape of the rectangular cylindrical machine frame of a rectangular counterflow type cooling tower. A shallow upper water tank is formed in the center of the upper water tank, and a passage port for air flow toward the exhaust stack of the counterflow type cooling tower is formed in the center of the upper water tank. A number of cooling liquid flow holes are bored at the bottom, and the outer end of the branch pipe whose tip opens into the upper water tank can be connected to the cooling water circulation system near one side of the short cylindrical frame. A piping unit for a water sprinkler in a rectangular counterflow type cooling tower, characterized in that the short cylinder frame is formed between the rectangular cylinder machine frame and the exhaust pipe so that its upper and lower ends can be connected.

[Effect of idea]

By configuring the piping unit for the water sprinkler as described above, and by interposing this piping unit between the rectangular cylinder frame and the exhaust pipe of the rectangular countercurrent cooling tower,
In addition to being able to uniformly spray the liquid to be cooled over all the filling material filled in the rectangular tube machine frame, in addition to the rotary water sprinkler pipes that are piped radially from the rotary swivel as described in Japanese Utility Model Publication No. 59-23994, By incorporating the above unit, without installing fixed sprinkler pipes above or below the rotary sprinkler pipes radially from the center of the rotary swivel, it is possible to spread over a wide area at the four corners of the rectangular cylinder frame of the square counterflow type cooling tower. The liquid to be cooled can be evenly distributed from the upper water tank without increasing the ventilation resistance caused by the drainage pipe piping. This can be easily increased by incorporating a piping unit, and the manufacturing, modification, and repair of this cooling tower can be facilitated, and the heat exchange rate can be further increased.

〔Example〕

Next, a typical embodiment of this invention will be explained based on FIGS. 1 to 3.

In FIGS. 1 and 2, A represents the square cylindrical machine frame 10.
This is a countercurrent type cooling tower having a rectangular cylindrical machine frame 10.
The end cylinder frame 20, which is connected at its lower end to the upper end and can be freely connected to the lower end of the exhaust pipe 11 at its upper end, conforms to the planar shape of the square cylinder machine frame 10 and is formed into a square plane shape. . A blower 12 is installed inside this exhaust pipe 11.
is installed.

A horizontal to-be-cooled water supply pipe 2 extending from the center of one side 20a of this short cylindrical frame 20 to this internal center position
1, the inner end of the cooled water supply pipe 21 is bent upward at 90 degrees, and a water sprinkling device 14 has several water sprinkling pipes 13 that can freely rotate around the vertical axis O of the countercurrent cooling tower A. It is formed so that it can be connected to the rotary head 15 of the.

The outer end of this supply pipe 21 is located outside one side 20a of the short cylindrical frame 20 and can be connected to the cooled liquid circulation system B, and the tip of the branch pipe 22 branched from this outer end is The opening is located in a shallow dish-shaped upper water tank 23 formed on the upper part of the cylinder frame 20, and in the center of this upper water tank 23, a passage hole 24 for the air flow toward the exhaust pipe 11 is formed in a circular or eight-dimensional shape. It is formed into a rectangular shape, and an annular inner peripheral plate 31 is provided along the periphery of the passage opening 24.

The bottom of each corner storage area 25 of the upper water tank 23 is located at each corner C ₀ of the square machine frame 10 and has a right triangular shape in plan, and a number of cooling liquid flow holes 26 are bored in this bottom. These corner sump areas 25 communicate with each other by horizontal narrow passages 27.

In this way, the supply pipe 21 is connected to the short cylindrical frame 20,
By equipping the branch pipe 22 and the upper water tank 23, a water sprinkler piping unit C for use in the countercurrent cooling tower A is constructed.

[Effect of invention]

Next, the operation of the present invention constructed as described above will be explained along with its usage method.

In order to incorporate the water sprinkler piping unit C of the present invention into an existing or newly installed rectangular counterflow cooling tower mouth, first separate the rectangular tube machine frame 10 and the exhaust pipe 11, and then This piping unit C is connected between cylinder 11.
The short cylindrical frame 20 is interposed and integrally connected. At this time, the outer end of the supply pipe 21 is located outward on one side of the rectangular cylinder machine frame 10 where the outside air intake port 10a is not provided.

Next, the rotary head 1 of the water sprinkler 14
5 is connected to the inner end of the supply pipe 21 in the short cylindrical frame 20, and the outer end of this supply pipe 21 is connected to the cooled liquid circulation system B, and the upper water tank 23 is connected to this circulation system via the branch pipe 22. Connect indirectly to B and complete the installation work of piping unit C for the sprinkler system.

In the rectangular countercurrent cooling tower A incorporating the piping unit C in this way, the cooled liquid whose temperature has been raised by circulating through a refrigerator etc. is drawn up from the cooled liquid circulation system B and sent to the piping unit by the pump P. A part of the liquid to be cooled is supplied into the supply pipe 21 of C, and is sprayed from the water sprinkling pipe 13 of the water sprinkling device 14 while it is rotating onto the filler 28 filled in the center of the rectangular cylinder machine frame 10. is supplied into the upper water tank 23 through a branch pipe,
Filler group 2 located at each corner C ₀ of the square tube machine frame 10 from the cooled liquid flow hole 26 of each corner water reservoir area 25
Scattered on 8a.

While flowing down on the surfaces of all the fillers 28, 28a filled in this rectangular cylindrical machine frame 10 in a square shape as a whole,
This liquid to be cooled is transferred to the rectangular cylindrical machine frame 1 by the operation of the blower 12.
The filling material 2 is introduced into the air from the outside air intake port 10a.
8 and 28a, heat exchange occurs between the liquid to be cooled and the outside air due to latent heat action and contact conduction, similar to a normal cooling tower, and the air flow cools the liquid to be cooled and raises its own temperature. is the passage hole 2 formed at the center of the upper water tank 23 in the piping unit C.
4 and is discharged to the outside from the exhaust pipe 11.

In the embodiment, the cooled liquid supply pipe 2 extends horizontally within the short cylindrical frame 20 of the piping unit C.
1 is provided, but the water sprinkler pipe 13 can be freely rotated around the vertical axis O via the rotary head 15a at the tip of the riser pipe 30 raised in the center of the rectangular cylinder frame 10 of the existing counterflow type cooling tower A. Attach this supply pipe 21 to
Even if the branch pipe 22 can be directly connected to the liquid circulation system B to be cooled by eliminating the branch pipe 22, the present invention is the same. (See Figure 4) When the upper water tank 23 in the piping unit C is damaged or clogged, when repairing, cleaning, or replacing the upper water tank 23, drain the piping unit C in the reverse order of the installation procedure. By removing the upper water tank 23 from between the cylinder 11 and the rectangular cylinder frame 10, the upper water tank 23 is moved to an external repair place and cleaned and repaired, or replaced with a new one.

[Effects specific to the embodiment]

In the embodiment of the piping unit having the supply pipe 21, the riser pipe in the conventional rotating water sprinkler device can be removed from the center of the square tube machine frame 10, and the square tube machine frame 1
The filling amount of the filler 28 in the center part of 0 can be increased,
and the outer end of the supply pipe 21 is located outward on one side of the square cylindrical machine frame 10 where the outside air intake port 10a is not provided,
In the mode of distributing and supplying the liquid to be cooled into the upper water tank 23 through the branch pipes 22 branching from this outer end, the branch pipes 22 do not get in the way when connecting the countercurrent cooling towers A, and the cooling capacity This branch point is located close to the upper water tank 23 and the water sprinkler 14, and the temperature difference between the cooled liquid supplied to the upper water tank 23 and the water sprinkler 14 can be reduced.
The liquid to be cooled within the filling material can be cooled to almost the same temperature on average and at the same time in the center and corners of the filling material.

In the case of a piping unit without a cooling liquid supply pipe, an existing sprinkler system having a riser pipe can be effectively used, and the number of parts of the piping unit can be reduced.

[Brief explanation of the drawing]

The figures relate to this invention; Fig. 1 is a longitudinal sectional view of the first embodiment of this invention, Fig. 2 is a plan view thereof, and Fig. 3 is a rectangular orientation incorporating the first ornament. FIG. 4 is a schematic longitudinal sectional view of a rectangular countercurrent cooling tower similar to FIG. 3 incorporating other embodiments. Explanation of the main symbols in the diagram: C... Piping unit for water sprinkler equipment.

Claims (1)

[Scope of utility model registration request] A shallow upper water tank is formed at the top of a flat rectangular short cylindrical frame that matches the planar shape of the rectangular cylindrical machine frame of the square counterflow type cooling tower. In addition to forming passage ports for the air flow toward the exhaust pipe of the flow-type cooling tower, a number of cooling liquid flow holes are bored at the bottom of the upper water tank at the corners of the upper water tank. The outer end of the branch pipe whose tip is open at the top is near one side of the short cylindrical frame and can be connected to the cooling water circulation system, and the short cylindrical frame is connected between the square cylindrical machine frame and the exhaust pipe above and below. A piping unit for a water sprinkler in a square countercurrent cooling tower, characterized in that it is connectable at the ends.