KR101866147B1 - Multi-stage cross flow type cooling towers) - Google Patents

Abstract

A multi-stage cross flow-type cooling tower according to the present invention comprises: a flow rate control unit which controls a flow rate of circulating cooling water; a casing which has a multilayered device space unit; multiple heat exchange units which are respectively provided in the device space unit divided by the casing and perform heat exchange between cooling water supplied from the upper part and air introduced from the side part; a blowing unit which flows air to allow air to be introduced from the outside to the heat exchange units; a water supply unit; a water collecting unit; a cooling water supply line; a drainage hole; and an extraction unit. A use of a filter or the like may be minimized, or a replacement cycle of a filter or the like may be maximized.

Description

Multi-stage cross flow type cooling towers

The present invention relates to a multi-stage orthogonal flow type cooling tower, and more particularly, to a multi-stage orthogonal flow type cooling tower having a cooling water circulation structure capable of removing physical and chemical foreign substances.

The cooling tower is a device that cools high-temperature cooling water that has passed through a heat exchanger with low-temperature water by bringing it into contact with air by an artificial mechanical action. The cooling effect consists of two ways of using latent heat to cool by using heat transfer by heat transfer using water and air temperature difference and evaporation of water itself.

The cooling tower serves not only as a waste heat removing device for removing waste heat accompanying a refrigerator or an industrial heat exchanger using a cooling fluid (cooling water or refrigerant), but also as a waste heat removal device for removing waste heat in a middle season (early spring or late fall) It is also the most economical source of cold source that produces freezing water instead of big refrigerator with consumption power and performs free cooling of outside air.

An evaporative cooling type cooling tower for cooling cold water for normal cooling is called an evaporative cooler, and an evaporative cooling type cooling tower for condensing a refrigerant is also called an evaporative condenser. The air-cooled cooling tower is referred to as an air-cooled condenser, and the air-cooled cooling tower for condensing the refrigerant is also referred to as an air cooled condenser.

Generally, a cooling tower is a counter flow type in which cooling air flows upward and cooling water flows downward according to the flow of cooling air and cooling water, an orthogonal flow type in which cooling air flows horizontally, a cross flow type, and a parallel flow type in which cooling air and cooling water flow in the same direction.

Such a cooling tower may be cooled in various forms, configurations, and styles depending on the characteristics of the cooling, and the cooling operation may be performed by cooling the fluid (cooling water, cooling oil, etc.) fluid condensing, which condenses into liquid by cooling a gas (refrigerant gas, vapor, etc.).

The cooling method is an evaporative cooling method in which cooling water is cooled by a latent heat of evaporation generated when a part of cooling water flowing in contact with cooling air in a wet cooling type heat exchanger is evaporated evaporative cooling or wet cooling "means that a cooling fluid flowing in a closed heat transfer tube of a dry cooling type heat exchanger flows to the outer surface of the heat transfer tube A dry cooling to cool by the sensible heat of the cooling air, a mixed cooling to cool the cooling fluid through a hybrid cooling type heat exchanger combining the wet cooling heat exchange part and the dry cooling heat exchange part hybrid cooling.

In addition, the system of the heat exchange unit includes an open circuit-wet cooling type heat exchanger in which cooling water and cooling air flow into the fillers to evaporate heat by mutual contact, and a cooling fluid (cooling water or coolant) A closed circuit-wet cooling type heat exchanger in which cooling water and cooling air are brought into contact with each other on the outer surface of a closed heat transfer tube that flows into a closed heat exchanger, and a hybrid heat exchanger a type heat exchanger, and a close circuit-dry cooling type heat exchanger for performing sensible heat exchange while flowing cooling air on the outer surface of a closed heat transfer tube through which a fluid to be cooled flows.

The fillers of the open heat exchanger include film type fillers comprising a plurality of film sheets with a wide heat exchanging surface area and bars having a specific splash shape within the filling space, Splash type fillers comprising a plurality of splash bars which are arranged so as to intersect with each other to collide and collapse the falling cooling water to repeatedly interrupt the falling and increase the contact surface of fine droplets and air .

The closed type heat exchange unit may include a heat transfer tube through which a fluid to be cooled flows, a cooling fluid inlet header to which one end of the heat transfer tube is connected, and a cooling fluid outlet header to which the other end of the heat transfer tube is connected.

In addition, the sprinkling section is mainly applied to orthogonal flow type cooling towers, and has a distribution basin or hot water basin at the top and gravity water spraying nozzles having a plurality of spray holes or nozzles penetrating the bottom of the sprinkling water tank. It is mainly applied to the gravity sprinkle type distribution system and counter flow type cooling tower. It is applied to the cooling water distribution pipe and the cooling water distribution pipe by using a pressurized sprinkle type having a plurality of spray nozzles or holes distribution system.

The blower fan is classified as an axial type fan which is mainly applied to an induced draft cooling tower and a centrifugal type fan which is mainly applied to a forced draft cooling tower .

The driving method of the blowing fan can be classified into a belt driving type, a gear reducer driving type, or a direct drive type.

Next, the orthogonal flow type cooling tower to which the present invention is applied is a structure which is advantageous in that it is advantageous to lower the pump pumping head, the low operating noise, the convenience of inspection and maintenance, and the vertical expansion of the cooling part according to the installation site restriction , Low operating cost, and so on, as well as dominating cooling demand for air conditioning, and is widely used in industrial cooling.

It is indispensable to examine pollution factors when installing a cooling tower. The pollution factors of the cooling tower are vibration, noise, scattering, and white smoke. In addition to the conventional vibration and noise problems, scattering and white smoke are becoming more and more problematic due to the demand for compactness of installation sites and environmental comfort.

In order to lower the temperature of the water, the air is forcibly ventilated by the blower, and the air and the cooling water are brought into direct contact with each other. Scattering refers to the discharge of small droplets of cooling water to the outside together with air during this process. However, evaporated water vapor is not included. To reduce this scatter, we install an eliminator and separate water droplets from the air.

The scattering includes the dropping of water by the wind, or the dropping out from the louver at the air inlet. However, if the fly ash is reduced forcibly, the pressure loss becomes large, and if the pressure loss becomes large, the fan resistance becomes excessive due to the air resistance.

On the other hand, as the circulating water evaporates repeatedly, the solids are not removed at all, and the solids are concentrated, thereby increasing the causticity of the circulating water pipe and facilitating formation of scale, so that blowdown of the circulating water is performed. In addition, various filtration devices and filters are used in order to filter foreign substances that are not dissolved and floated, but these filters are used only once, which causes not only economic loss but also environmental pollution problem.

The present invention provides a multi-stage orthogonal flow type cooling tower having a cooling water circulation structure capable of minimizing the use of a filter or the like or maximizing a replacement cycle of a filter or the like.

The multi-stage orthogonal flow type cooling tower according to the present invention includes: a flow rate controller for controlling a flow rate of circulating cooling water; A casing forming a multi-layer device space portion; A plurality of heat exchangers provided in the device space defined by the casing for performing heat exchange between the cooling water supplied from the upper portion and the air introduced from the side portion; A blowing unit for allowing air to flow from the outside to the heat exchanging unit; A water spraying unit for spraying cooling water onto the upper portions of the respective heat exchanging units; A collecting portion provided at a lower end of the heat exchanging portion and collecting cooling water falling from the heat exchanging portion; A cooling water supply line provided with a cooling water inlet and forming a path for supplying cooling water from the cooling water inlet to the sprayer; A drain for discharging the cooling water collected in the water collecting units toward an external cooling load facility; And a take-out part for taking out a part of at least one of the cooling water drained from the collecting part under control of the flow control part, the cooling water discharged through the drain hole, and the cooling water flowing through the cooling water inlet,

Wherein the takeout portion includes: a first pipe main body provided in a horizontal direction; an end face enlarged portion having a cross-sectional area enlarged at a right angle to the direction of flow velocity in at least a part of the first pipe main body; A first blow-out section provided with a first blow-out pipe; And a vortex guiding portion provided on the flow path formed by the second piping main body and in contact with the cooling water passing through the second piping main body in an inclined plane to form a vortex, And a second blowout pipe provided at a rear end side of the cooling water moving direction to extract the cooling water.

Further, the cross-sectional enlarged portion of the first blow-out portion may be formed with a cylindrical path having a larger diameter than the diameter of the first pipe body.

The first blow-out portion may be provided with a fourth blow-out pipe for blowing air so that the water surface is exposed at the upper end portion of the cross-sectional enlarged portion and the end portion is soaked in the cooling water so as to be adjacent to the exposed water surface of the cooling water, have.

The third take-out pipe is provided with a third take-out pipe for introducing air so that the water surface of the cooling water is exposed at the upper end of the second pipe main body and for dipping the cooling water in the cooling water so that the end thereof is adjacent to the exposed water surface .

And a flow pipe for discharging cooling water from the second pipe main body may be formed between the second take-out pipe and the third take-out pipe.

The vortex inducing unit may be disposed at a position lower than the supply position of the cooling water introduced from the first blowout unit and the second blowout unit may be taken out from the cooling water formed in the vortex formed at the lower part of the vortex induction unit.

The third take-out pipe is provided with a third take-out pipe for introducing air so that the water surface of the cooling water is exposed at the upper end of the second pipe main body and for dipping the cooling water in the cooling water so that the end thereof is adjacent to the exposed water surface .

And the cooling water flowing from the first blowout portion can be supplied between the vortex induction portion and the third blowout portion.

According to the present invention, foreign matter is filtered through a physical separation method in the process of taking out cooling water for blowdown, thereby reducing the amount of the filter used and maximizing the replacement cycle.

1 is a schematic cross-sectional view of a multi-stage orthogonal flow cooling tower taken in a vertical direction according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of the water spraying portion of Fig. 1 taken in a vertical direction.
FIG. 3 is a schematic longitudinal sectional view of the water spraying portion and the collecting portion of FIG. 1 cut in the vertical direction.
4 is a schematic view showing a take-out unit according to an embodiment of the present invention.
Fig. 5 is a schematic view for explaining the action of the first take-out unit in Fig. 4. Fig.
6 is a schematic view showing a first take-out unit according to another embodiment;
7 is a schematic view showing a take-out portion according to another embodiment;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the absence of special definitions or references, the terms used in this description are based on the conditions indicated in the drawings. The same reference numerals denote the same members throughout the embodiments. For the sake of convenience, the thicknesses and dimensions of the structures shown in the drawings may be exaggerated, and they do not mean that the dimensions and the proportions of the structures should be actually set.

Figure 1 is a schematic vertical cross-sectional view of a multi-stage orthogonal flow cooling tower according to an embodiment of the present invention, Figure 2 is a schematic vertical cross-sectional view of the spraying portion of Figure 1, Figure 3 is a cross- 1 is a vertical cross-sectional view taken along the vertical direction of the water spray part and the water collecting part.

The multi-stage orthogonal flow type cooling tower 1a according to the first embodiment of the present invention is provided with a side casing 11a forming a device space portion 14 provided with a feed mechanism 13 and a side casing 11b provided at a lower end portion of the side casing 11a And includes a base frame 50 and a cooling tower base 160. Each of these frames is formed by dividing the device space portions 14 into a plurality of layers and each of the device space portions 14 is provided with the heat exchange portions 20 individually. And piping for introducing and recovering cooling water are respectively provided. In addition, the configurations for supporting various components and the configurations of the casings for forming the outer shape of the multi-stage orthogonal flow type cooling tower 1a are described in the prior art 1 (Korean Patent Registration No. 10-1694122) do.

In the present invention, the circulation path for introducing and recovering the cooling water and the related components have the main technical features.

Meanwhile, as a facility for maintenance, an opening 114 for opening and closing the side casing 11a on the upper part of the water collecting tank 100 and an opening 114 for mounting the opening and closing type inlet 115a, And a ladder 140 provided in the device space part 14 so that an operator can enter and exit the device space part 14 from the device 14.

However, the heat exchanger 20 according to the present invention is not limited thereto, and various types of heat exchangers included in the above-mentioned prior art 1 and other orthogonal-type cooling towers can be used .

The heat exchanging part (20) is disposed in the device space part (14). A louver 23 is provided on the outside of the heat exchanging part 20 (on the inside and the outside of the device) and an eliminator 24 is provided on the inside.

In the case of an induced draft cross flow, the air enters the louver 23 installed from the lower part to the upper part of the cooling tower, moves the filler 25 and the eliminator 24 horizontally, moves toward the fan, do. The water is distributed through the respective pipes, flows in from the upper part of the filling material 25, and falls through the filling material 25 into the lower water bath.

That is, air moves horizontally and water flows vertically. In the case of the orthogonal flow type cooling tower, the injection pressure of the spray water nozzle is lower than that of the counter flow type cooling tower.

The water spraying unit (30) sprays cooling water to the heat exchanging unit (20). 2 and 3, the collecting unit 100 and the lowermost collecting unit 100a will be described.

The water collecting part (100) is a constituent part for collecting the cooling water flowing in the vertical direction from the heat exchanging part (30). The header beam 32 divides one side of the sprinkling space 19 formed in the upper part of the heat exchanging part 20 to prevent the cooling water from escaping and bypass flow of the cooling air, And is held in close contact with the lower part to support the collecting part 100 and to mutually support the upper joining frame 50b. The cooling water inflow ports 31 are provided in a pair penetrating the bottom plate of the header beam 32 and are formed to communicate with the upper side plate of the header beam 32. The water spraying unit 30 includes a top plate 35 and a bottom plate 351 parallel to the top plate 35 and having a water spray hole 34a formed by a plurality of spray holes, A plurality of reinforcement ribs 37 provided on the bottom surface of the upper plate 35 for reinforcing the supporting force of the working load on the upper plate 35 and a plurality of reinforcement ribs 37 provided on the upper plate 35 And a bottom plate 351, which are mutually supported.

In addition, the water spraying unit 30 is formed with a water spray chamber 33 in the form of a tubular sprinkler so that the cooling water can be sprayed in a pressure spraying manner. The repair port 46a is composed of a rectangular tubular body having one end coupled through the inner side plate of the header beam 32 and the other end having a flange.

The support beam 51 on the inner side is provided on the lower side of the inner side plate of the header beam 32 and the support beam 52 on the outer side is provided on the bottom portion 351 of the outer side plate of the water spray chamber 33, Supports components. The support beams 53 provided on both sides of the bottom plate of the water spray chamber 33 mutually support the lower end engagement frame 50e. The outer partitioning member 17a separates the other side of the spraying space 19 formed between the upper part of the heat exchanging part 20 and the lower part of the spraying part 30. [

On the other hand, the lowermost collecting section 100a is disposed below the lowermost heat exchanging section 20, and a drain port 104 is provided. The filtration unit 106 provided in each of the collecting units 100 excluding the lowermost collecting unit 100a filters contaminants such as suspended solids of the cooling water flowing out to the drainage port 104. [

Referring to FIG. 1, the components for supplying the cooling water are as follows.

The cooling water supply pipe (80) stands upright in the device space (14), and a cooling water inlet (81) is provided at the lower end to introduce cooling water. The cooling water supply pipe 80 is provided at its upper portion with cooling water supply mechanisms for supplying cooling water to the water spraying unit 30. The cooling water flowing through the cooling water supply pipe 80 is supplied to the cooling water distribution pipe 91, . The cooling water supplied to the cooling water distribution main pipe 91 flows into the cooling water distribution pipe 92 through the flow rate control valve 93 and the filtration unit 94 and the like.

In the cooling water outlet pipe 95, the cooling water discharged from the water collecting tank 100 through the water outlet 104 reaches the lowermost water collecting tank 100a or the water outlet 102.

That is, when the cooling tower 1a is operated, the high-temperature cooling water is supplied to the cooling water distribution main pipe 91 and the cooling water distribution pipe 92 through the cooling water inlet port 81, the cooling water supply column pipe 82, And is supplied to each of the water spraying portions 30 independently.

Here, the flow rate of the cooling water flowing into the water spraying part 30 during the test operation is set by adjusting the flow rate control valve 93, and when the unbalance of the spray flow rate is confirmed through the inspection window in the maintenance inspection, The flow rate can be adjusted again. The cooling water supplied to the water spraying unit 30 is sprinkled and exchanges heat while passing through the heat exchange unit 20, and the cooled cooling water is collected in the lowermost collection unit 100a.

The cooling water supplied to the uppermost water spraying unit 30 is sprayed and exchanges heat while passing through the heat exchanging unit 20. The heat exchanged cooling water passes through the water collecting tank 100, the drain hole 104 and the cooling water drain pipe 95, And is guided to the receiving portion 100a.

The cooling water collected in the lowermost collecting section 100a is supplied to the cooling load facility (apparatus) through the drainage port 104. The high temperature cooling water that has absorbed the waste heat after heat exchange from the cooling load facility (apparatus) And this cooling operation is repeated as long as the cooling tower 1a is operated.

In order to lower the temperature of the water, the air is forcibly ventilated by the blower 60, and the air and the cooling water are brought into direct contact with each other for heat exchange. The blower 60 converts the exhaust flowing into the horizontal or upward inclined air stream into a vertical air flow and discharges it. The air outlet 16 side and the upper side are opened and the other three sides are connected to the side casing 11b ' And an exhaust stack 130 constituted by integral side walls.

On the other hand, the take-out unit to be described later collects the pathway or waste heat toward the cooling load facility through the drainage path from the respective collectors 100 to the lowermost collecting unit 100a or the lowermost collecting unit 100a, And may be provided on the path immediately before the air is introduced through the inlet port 81.

The take-out unit according to one embodiment will be described with reference to Figs. 4 and 5. Fig. FIG. 4 is a schematic view showing a take-out unit according to an embodiment of the present invention, and FIG. 5 is a schematic view for explaining the action of the first take-out unit in FIG.

In the method of cooling the hot water in the cooling tower, a part of the hot water is evaporated to deprive the evaporation heat from the hot water to lower the water temperature, so that a part of the water evaporates. Supplementary water is added to the circulating flow to compensate for some of this evaporated water.

(Kg / h), C: specific heat of water (1 kcal / kg ℃), carryover (kg / h) , WD, kg / h))

In addition, since the air flows in the cooling tower at a certain wind speed by the blower, water droplets are blown on it and the water quantity is reduced. This is called carryover, which is usually calculated to be about 0.02% of the circulating water.

Blow down (WB, kg / h) means to discard some of the circulating water. As the circulation water evaporates repeatedly, the solids are not removed at all and the solids are concentrated, which makes the circulation water more corrosive and easier to form scale, thus discarding part of the circulating water. Generally, 0.2% of the circulating water is required.

The replenishment quantity (? T) is calculated as follows.

DELTA T = WE + WD + WB

Since the temperature difference between inlet and outlet is 5 ℃ in the case of general air conditioning, evaporation amount is 0.84% of circulating water. Therefore, the total replenishment quantity required is 1.06%, and actually 1.2% of the circulation quantity is designed.

In this way, in controlling the flow rate, blowdown is an essential element and prevents the dissolved solids from being concentrated through blowdown. In addition, non-dissolved solid matter is filtered using a filtering member or the like. However, since such a filter member is used once, it needs to be replaced periodically. If the filter member is excessively used or foreign matter is adhered to the filter member, the circulation efficiency of the cooling water may be lowered.

The take-out part according to the invention serves to lower the reliance of such filter elements or filters and to maintain the circulating efficiency of the cooling water without large fluctuations.

Specifically, the take-out unit 900 according to the present embodiment includes a first take-out unit 920 and a second take-out unit 940.

The blowout part 900 is provided in a device space defined by a casing forming a multi-layered device space part, and is provided with a plurality of heat exchange parts for performing heat exchange between cooling water supplied from the upper part and air introduced from the side part, And the blowdown or total blowdown amount is taken out through a specific structure. That is, a part of the cooling water is taken out from at least one of the cooling water drained from the collection part, the cooling water discharged through the drain hole, and the cooling water flowing through the cooling water inlet.

The first extraction portion 920 includes a first piping main body 921 provided in the horizontal direction and a cross sectional enlargement portion 922 having an enlarged sectional area perpendicular to the flow direction in at least a part of the first piping main body 921, And a first blow-out pipe 928 for blowing out the cooling water from the lower end side of the cross-sectional enlargement unit 922.

When the cooling water flows through the inner space 929 of the cross-sectional enlarged portion 922, the cross-sectional area of the first take-out portion 920 increases, so that the pressure increases and the flow rate decreases. At this time, as shown in FIG. 5, a flow circulating at a slow flow rate occurs in the expanded region R1. In this case, the difference in density depending on the physical properties occurs, so that the foreign matter having a low floating property of the foreign matter is present at a relatively high density in the region R1.

The first blowout part 920 takes out the foreign matter dissolved in the cooling water together with the foreign matter having a low floating property or the non-soluble foreign matter at a relatively high ratio.

The second takeout part 940 is provided on the flow path 990 formed by the second piping body 941 and the second piping body 941 provided in the vertical direction and is connected to the cooling water flowing through the second piping body 941 A vortex inducing part 950 and a second take-out tube 948_ forming an inclined surface in contact with the first vortex tube.

And the cooling water forms a vortex while passing through the vortex induction portion 950. In this case, the foreign matter having a relatively large specific gravity is likely to exist at a relatively large density on the outer side of the vortex due to the centrifugal force. The second take-out tube 948 extracts cooling water from an outer portion of the region R2 in which such vortex is formed.

The second take-out unit 940 also introduces air (R3) so that the water surface of the cooling water is exposed at the upper end of the second pipe main body 941. The end of the third take-out tube 958 is immersed in the cooling water so as to be adjacent to the exposed water surface of the cooling water, and the cooling water is taken out. At this time, the surface of the exposed cooling water may have a relatively high probability of foreign matter having a high floating property, a non-soluble foreign matter having a relatively low specific gravity, or a foreign matter before dissolution. At this time, a flow path for discharging cooling water is formed between the second take-out tube 948 and the third take-out tube 958.

The take-out unit according to another embodiment will be described with reference to Figs. 6 and 7. Fig. FIG. 6 is a schematic view showing a first take-out unit according to another embodiment, and FIG. 7 is a schematic view showing a take-out unit according to another embodiment.

As shown in Fig. 6, the first take-out part 920a according to the present embodiment is different from the first take-out part 920 shown in Fig. 4 in that a fourth take-out tube 958 is formed. At this time, the structure and action of the fourth take-out tube 958 are the same as those of the third take-out tube 958 provided in the second take-out part 940 of Fig.

7, when the drainage passage is formed in a direction lower than the height of the first blowout part 920b, the vortex inducing part 950 is positioned at a position lower than the supply position of the cooling water flowing from the first blowout part 920b So that a vortex is formed in the lower part of the vortex inducing part 950. [ At this time, the second take-out tube 948 takes out the cooling water from the lower portion of the vortex induction portion 950.

The second take-out unit 940a includes a third take-out pipe 958 for introducing air so that the water surface is exposed at the upper end portion and the end portion is immersed in the cooling water so as to be adjacent to the exposed water surface of the cooling water, . The third take-out tube 958 according to the present embodiment has the same structure and function as those of the third take-out tube and the fourth take-out tube of Figs. 4 and 6 described above.

The above-described first to fourth blow-out pipes are controlled by a flow control unit (not shown) for controlling the flow rate of the cooling water, and blow out the extracted cooling water to perform cooling water blowdown.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. have.

900:
920: First take-
940: Second take-
922:
928: First take-out pipe
948: Second take-out hall
950: vortex induction portion
958: Third take-out pipe

Claims (8)

A flow controller for controlling the flow rate of the circulating cooling water;
A casing forming a multi-layer device space portion;
A plurality of heat exchangers provided in the device space defined by the casing for performing heat exchange between the cooling water supplied from the upper portion and the air introduced from the side portion;
A blowing unit for allowing air to flow from the outside to the heat exchanging unit;
A water spraying unit for spraying cooling water onto the upper portions of the respective heat exchanging units;
A collecting portion provided at a lower end of the heat exchanging portion and collecting cooling water falling from the heat exchanging portion;
A cooling water supply line provided with a cooling water inlet and forming a path for supplying cooling water from the cooling water inlet to the sprayer;
A drain port for discharging the cooling water collected in the collection section toward an external cooling load facility; And
And a take-out part for taking out a part of at least one of the cooling water drained from the water collecting part, the cooling water discharged through the drain hole, and the cooling water flowing through the cooling water inlet according to the control of the flow control part,
The take-
A first pipe main body having a length in a horizontal direction (a direction orthogonal to the gravity direction), a cross-sectional enlarged portion having a cross-sectional area enlarged at a right angle to the direction of flow velocity in at least a part of the first pipe main body, A first blow-out section provided with a first blow-out pipe for blowing out cooling water from a side of the first blow- And
And a second pipe body having a length in a vertical direction (gravitational direction), the first is provided on a flow path formed by the second pipe body vortex to form a vortex into contact with the cooling water and the inclined surface via said second piping main body guides and And a second take-out portion provided at a rear end side of the vortex inducing portion in a cooling water moving direction and having a second take-out tube for taking out the cooling water. The method according to claim 1,
Wherein the cross-sectional enlarged portion of the first blow-out portion is formed with a cylindrical path having a larger diameter than the diameter of the first pipe body. 3. The method of claim 2,
Wherein the first take-
Air is introduced into the upper end portion of the end face enlarged portion,
And a fourth blow-out pipe for blowing out the cooling water by being immersed in the cooling water so that the end thereof is adjacent to the water surface which is the interface between the cooling water and the inflow air . 3. The method of claim 2,
Wherein the second take-
Air flows into the upper end portion of the second piping main body,
And a third take-out pipe which is immersed in the cooling water so as to take out the cooling water so that the end thereof is adjacent to the water surface which is the interface between the cooling water and the inflow air . 5. The method of claim 4,
And a flow pipe for discharging cooling water from the second pipe main body is formed between the second take-out pipe and the third take-out pipe. The method according to claim 1,
Wherein the vortex guiding portion is provided at a lower position than the supply position of the cooling water flowing from the first blow-out portion, and the second blow-out portion is taken out from the cooling water formed with the vortex formed at the lower portion of the vortex guiding portion. The method according to claim 6,
Wherein the second take-
Air flows in such a way that the water surface of the cooling water is exposed at the upper end of the second pipe body,
And a third blow-out pipe for blowing out the cooling water by being immersed in the cooling water so that the end portion is adjacent to the exposed water surface of the cooling water. 8. The method of claim 7,
And the cooling water flowing in from the first blowout portion is supplied between the vortex guiding portion and the third blowout pipe .

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