JP2022190597A - cooling tower - Google Patents

Abstract

To provide a cooling tower capable of optimizing the structure and arrangement of a filling material to promote uniform arrival of circulating water to each part of the filling material, thereby improving efficiency of heat exchange between circulating water and air.SOLUTION: Filling materials 21, 22, 23 and 24 formed by laminating filling material sheets are laminated vertically in a plurality of stages in an arrangement that allows air and water to pass through in a vertical direction, the filling materials 21, 22, 23 and 24 are laminated with different lamination directions by 90° for each stage, and a direction in which circulating water spreads horizontally and flows between the filling material sheets is changed by 90° for each stage of the filling materials, so that the circulating water flowing down the filling materials 21, 22, 23 and 24 is made to flow down over the entire area of the filling materials without biasing a reaching range of the filling materials, and a frequency of contact between air and water in the filling materials 21, 22, 23 and 24 is increased to enable efficient heat exchange.SELECTED DRAWING: Figure 6

Description

TECHNICAL FIELD The present invention relates to a cooling tower that cools a circulating liquid-phase heat medium by exchanging heat with air in a heat exchange section, and more particularly to a small counterflow cooling tower.

In general, in a cooling tower installed outdoors for the purpose of cooling liquid-phase heat transfer media such as water that is circulated in factories and air conditioning equipment, the operation of the fan (blower) in the heat exchange section inside the cooling tower The cooling is performed by directly or indirectly exchanging heat between the air taken in from the outside (outside air) and the heat medium.

Among these, the small cooling tower sprinkles circulating water from the water sprinkling part above the packing material of the winding structure housed in the round tower body, and introduces outside air from below to exchange heat. It was often regarded as a countercurrent type device that allows the
An example of such a conventional counterflow type cooling tower is disclosed in Japanese Utility Model Laid-Open No. 6-55079.

Japanese Utility Model Laid-Open No. 6-55079

A conventional counterflow cooling tower has the configuration shown in the above patent document, and the water sprayed from the water sprinkling part and the outside air introduced from the suction port at the bottom of the tower body and directed upward are opposed to each other. Since the heat is exchanged as a flowing flow, the heat exchange efficiency has been relatively high, but in recent years, there is a demand for further improvement in efficiency.

However, conventional round cooling towers are structurally difficult to make further changes, and there is little room for improvement in terms of efficiency. In addition, due to the winding type filler structure, if you try to increase the cooling capacity, the amount of winding of the filler will increase, and the installation area will also increase, so there is a problem that the compact form cannot be maintained. rice field.

In addition, in the conventional round cooling tower, the movable water sprinkling part located above the filler has a mechanism that rotates to move the water outlet position and sprinkles water on the filler located below. , water droplets are likely to occur, and such droplets are scattered in the space above the filler by the upward flow of the induced draft air, and some of them are discharged outside the cooling tower together with the air. Discharge of water droplets to the outside of the cooling tower causes loss of what should be circulated as circulating water, resulting in a decrease in efficiency of the cooling tower and a risk of becoming a source of infectious diseases such as Legionnaires' disease. I had a problem.

In addition, since the water sprinkling part is movable, it is relatively easy to cause problems. However, there is a problem that the efficiency of

The present invention has been made to solve the above-mentioned problems, by optimizing the structure and arrangement of the filling material, promoting uniform arrival of circulating water to each part of the filling material, and improving the efficiency of heat exchange between the circulating water and air. It is an object of the present invention to provide a cooling tower capable of improving

In the cooling tower according to the present invention, the circulating water to be cooled is sprayed against the packing material in the cooling tower body, and the outside air is circulated upward from below the packing material by the induced draft by the fan, so that at least the packing material is in contact with the outside air. In a counterflow open type cooling tower that exchanges heat with circulating water, the filler is formed by laminating filler sheets, and the stacking direction is horizontal, and the stack is stacked in multiple stages in the vertical direction. In addition, the filling material sheets are arranged in different lamination directions for each overlapping stage.

As described above, according to the present invention, the filler formed by laminating the filler sheets is vertically stacked in a plurality of layers in such an arrangement that the direction of lamination of the filler sheets is horizontal and air and water can pass in the vertical direction. and by arranging so that the stacking directions of adjacent filling materials are different from each other, and by changing the direction in which the circulating water spreads horizontally between the filling material sheets and flows for each stage of the filling material, Allows water to flow down over the entire area of the filling material without biasing the reachable range of the circulating water flowing down the filling material, and increases the frequency of contact between air and water in the filling material for efficient heat exchange. be able to.

In addition, by adopting a structure in which multiple layers of filler are stacked vertically, even if the volume of the filler is increased in order to increase the cooling capacity, the area occupied by the filler does not necessarily increase. The installation area is not large, and space saving can be maintained.

In addition, the cooling tower according to the present invention is formed by arranging a plurality of pipes or troughs in parallel in a direction orthogonal to the longitudinal direction of the pipes or troughs with the longitudinal direction of the pipes or troughs horizontal, as necessary. A water sprinkling part is provided in an immovable state above the material, each of the pipes or troughs is provided with a plurality of holes at the bottom for naturally flowing circulating water flowing into the pipes or troughs, and the plurality of stages of filling Among the materials, the uppermost filling material is arranged so that the upper part of the filling material is adjacent to each pipe or gutter of the water sprinkling section.

As described above, according to the present invention, the sprinkler section is provided with a plurality of pipes or troughs arranged in parallel to distribute and introduce the circulating water, and the sprinkler section is provided with a plurality of holes for allowing the circulating water to naturally flow down. On the other hand, the filler is placed close to the upper part, and the circulating water that flows down from the plurality of holes in the lower part of the water sprinkling part in a stationary state immediately reaches the filler and flows along it, so that the water sprinkling part There is no process in which the circulating water moves as water droplets between and the filling material. It is possible to suppress the generation of splashes from water, prevent the reduction of circulating water and suppress efficiency deterioration, and prevent the circulating water from scattering outside the cooling tower, resulting in the expected scattering of circulating water splashes. Adverse effects can be avoided.

In addition, by keeping the sprinkler unit in a stationary state, the sprinkling unit will not move unintentionally even if it receives force from the air flowing inside the tower body, and the circulating water will be sprayed with the sprinkler unit in a fixed state. It is possible to maintain a state in which circulating water is appropriately sprinkled over each part of the filling material, and to continue stable heat exchange without fluctuation.

Further, in the cooling tower according to the present invention, if necessary, the tower body is a rectangular frame composed of a frame formed by combining pillars and beams, and an outer plate attached to the frame and forming each side surface. Part or all of the tower body, including the range where the filling material of the predetermined outer plate is present, is detachable from the other part of the tower body, and the detachable outer plate is removed. Thus, an open portion is created in which the packing material can be handled by an operator outside the tower body.

As described above, according to the present invention, the tower body is formed into a rectangular tubular shape composed of the frame and the outer plate, and part or all of the predetermined outer plate including the range where the filling material exists is replaced with the other part of the tower body. In the state that the outer panel is partially or entirely removed to create an open portion, the worker can clean or replace the filling material inside the tower body, so that the filling material can be removed. The workability inside the tower body such as maintenance of the material is improved, and the maintenance of the filling material is properly performed, and the state where air and circulating water can pass normally between the filling material sheets without problems. can be maintained.

Further, in the cooling tower according to the present invention, if necessary, among the plurality of stages of fillers, the lowermost stage filler has a smaller spacing between stacked filler sheets than the other stages of fillers, It is formed in a laminated state in which the number of filler sheets per unit dimension in the lamination direction is increased.

As described above, according to the present invention, among the fillers provided in a plurality of layers, the lowermost filler, which is on the outlet side of the circulating water and the inlet side of the air, has a different lamination interval of the filler sheets. By increasing the number of layers and increasing the surface area of the filler, the contact area between the circulating water flowing down along each part of this lowermost filler and air is increased. In the lower packing material, the opportunity for heat transfer between the circulating water whose temperature has been lowered through heat exchange with the upper packing material and the low temperature air immediately after being sucked into the tower body is increased. Even if the temperature difference between the circulating water and the air is small, the temperature of the circulating water can be sufficiently lowered, and the cooling efficiency of the cooling tower can be improved.

1 is a schematic perspective view of a cooling tower according to an embodiment of the invention; FIG. 1 is a front view of a cooling tower according to an embodiment of the invention; FIG. It is a top view of a cooling tower concerning one embodiment of the present invention. 1 is a side view of a cooling tower according to an embodiment of the invention; FIG. FIG. 4 is an explanatory diagram of a water spray pipe arrangement state inside the tower body of the cooling tower according to one embodiment of the present invention. FIG. 3 is a schematic side view of the cooling tower according to the embodiment of the present invention with the outer plate removed. FIG. 4 is an explanatory diagram of a watering state from a watering unit in the cooling tower according to one embodiment of the present invention; FIG. 10 is a schematic rear view of a cooling tower according to another embodiment of the present invention with the outer plate removed.

A cooling tower according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 7. FIG. In this embodiment, as a counterflow type (counterflow type), a small cooling tower is provided with a water sprinkler on the upper side and an air suction port on the lower side with a filler provided below the blower for induced draft. An example of

As shown in the above figures, the cooling tower 1 according to the present embodiment includes a tower body 10 for passing circulating water as a heat medium and external air inside, and a contact for heat exchange between the circulating water and air. filling materials 21, 22, 23, and 24 for promoting the water distribution tank 30 disposed on the upper side surface of the tower body 10 and capable of temporarily storing circulating water; Circulating water is supplied from the water distribution tank 30, and the water spraying part 40 for spraying this circulating water to each part of the filling materials 21, 22, 23, 24, and below the filling materials 21, 22, 23, 24 A lower water tank 50 arranged to collect circulating water that has passed through the fillers 21, 22, 23, 24, and a filler sheet of the fillers 21, 22, 23, 24 arranged in the upper part of the tower body 10 25, a blower 70 for passing outside air by induced draft is provided.

The tower body 10 has a square tubular shape surrounding an inner space of a square or rectangular cross section, and is provided with an outside air intake port 11 at the bottom and an exhaust port for discharging the outside air after heat exchange in the tower body at the top. It is a configuration in which an outlet 12 is provided.
This tower body 10 is formed of a frame 16 formed by combining metal pillars and beams, and FRP outer plates 17 attached to the frame 16 by screws or the like to form each side. It is.

Each outer plate 17 of the tower body 10 is arranged to have a size exceeding the range where the filling materials 21, 22, 23, 24 inside the tower body exist on each side of the square tower body. Of these outer plates 17, at least one outer plate is detachable from other parts of the tower body. , 24 will be created.

The lower edge of each outer plate 17 including the detachable one is arranged inside the rising portion of the beam member forming part of the frame 16 in the tower body 10, and the circulating water is placed inside the outer plate 17. circulating water is prevented from leaking to the outside of the tower body 10 even if it reaches and flows down. At a location where the outer plate 17 is arranged inside the frame 16, the outer plate 17 can be attached to the frame 16 from the outside of the tower body. A nut for screwing may be integrated with a predetermined portion of the plate 17 .

In addition, an opening 13 for working with the water sprinkler 40 is provided on the side opposite to the side on which the water distribution tank 30 is located in the upper part of the tower body 10 . The opening 13 has a size that allows an operator to perform maintenance work on the sprinkler section 40 from the outside of the tower body 10 .
A lid-like cover portion 15 that enables opening and closing of the opening portion 13 is detachably disposed on the tower body 10 .

In addition, the cover part may be formed in a door shape connected to the side surface of the tower body 10 so that the opening part 13 can be opened and closed without being removed from the tower body 10 . In this case, it goes without saying that the cover portion is positioned at a location where at least the operator can work on the water spraying portion 40 without hindrance while the opening portion 13 is open.

The fillers 21, 22, 23, and 24 are formed by integrating a large number of substantially rectangular plate-shaped filler sheets 25 in a stacked state, and the filler sheets 25 are stacked so that the stacking direction of the filler sheets 25 is horizontal. A plurality of tiers (for example, four tiers) are stacked vertically in the tower body 10 in a state in which air and water can pass through the gaps 25 in the vertical direction. It is arranged such that the directions are different by 90°.

The fillers 21, 22, 23, and 24 are arranged below the blower 70 and the sprinkler section 40 and above the outside air suction port 11 at the bottom of the tower body, and are sprinkled with circulating water from above and from below to above. The configuration is such that outside air is allowed to pass in the direction, and heat exchange between the circulating water and the air is mainly performed between the filler sheets 25 .
Of the plurality of stages of fillers, the uppermost filler 21 is particularly arranged with its upper portion adjacent to the spraying part 40 .

The water distribution tank 30 is formed of a thin box-shaped body and is disposed on the upper side surface of the tower body 10 above the positions where the packing materials 21, 22, 23, and 24 are located. It is configured to be able to temporarily store a predetermined amount of circulating water supplied from the water tank 50 via a circulation line 90 leading to a refrigerator, an air conditioner, or the like.

The water distribution tank 30 is connected to one end of each watering pipe 41 forming a watering part 40 at its lower part, and communicates with these watering pipes 41 to distribute the stored circulating water to each watering pipe 41. It is configured to flow in.

In addition, the water distribution tank 30 is arranged such that the inlet portion 31 of the circulating water is separated from the connection position of the water spray pipe 41 as much as possible. Specifically, the circulating water inlet 31 in the water distribution tank 30 is provided above the center of the tank so as to be as far away as possible from the connecting position of the sprinkler pipe 41 in the lower portion. In addition, the inlet portion 31 is provided with a diameter as large as possible.

Furthermore, the water distribution tank 30 is provided with a vent hole 32 that communicates the inside of the tank with the outside of the tank (the space inside the tower), and the inside is opened to the atmosphere through the vent hole 32 . Ventilation holes 32 for communicating the inside of the tank with the outside are provided at predetermined locations separated from the circulating water inlet 31 at the center of the tank, specifically, at both ends in the longitudinal direction of the tank (sprinkling pipes). 41 parallel direction end). This vent hole 32 can also be used for the purpose of flooding the excess of internal circulating water beyond this hole position.

The water sprinkling part 40 is formed by arranging a plurality of water sprinkling pipes 41 in parallel in a direction perpendicular to the longitudinal direction of the pipes with the longitudinal direction of the pipes being horizontal, and arranged above the filling material 21 in a stationary state. It is a configuration that is
Each watering pipe 41 of the watering part 40 is connected to the water distribution tank 30 by detachably screwing one end thereof.

In addition, each watering pipe 41 is provided with a plurality of holes 42 at its lower part, receives supply of circulating water in the water distribution tank from one end communicating with the water distribution tank 30, and flows into the pipe. The water is caused to naturally flow down from the holes 42 at the bottom.
A plurality of holes 42 in the lower part of the sprinkler pipe 41 are arranged at predetermined intervals in the longitudinal direction of the pipe, and the size of the holes is made smaller as the distance from the water distribution tank 30 increases.
The top of the filling material 21 on the uppermost level among the filling materials is arranged in close proximity to each of the water spray pipes 41 of the water spraying unit 40 .

The lower water tank 50 is disposed on a support frame 51 connected to the lower part of the tower body 10, and receives the circulating water that has flowed down and temporarily stores and recovers the water.
In the lower water tank 50, the delivery side end of the circulation pipe 90 leading to the refrigerator, the air conditioner, etc., and the water supply part (not shown) of supplementary water supplied when the circulating water decreases are connected respectively. The configuration and the configuration in which a strainer (not shown) that captures foreign matter such as scale and allows only water to pass through is provided at the outlet of the circulating water proceeding to the circulation pipe 90 is the same as the known lower water tank of the cooling tower. and detailed description thereof is omitted.

In addition, in the lower water tank 50, a sheet body made of a porous material is arranged near the surface of the circulating water that is temporarily stored. The water passing through the fillers 21, 22, 23, 24 and flowing down to the lower water tank 50 is once in contact with the sheet body, thereby suppressing the noise generated when the water directly falls on the water surface of the lower water tank 50. - 特許庁can be done.

The blower 70 is arranged at the top of the tower body 10, and the external air introduced from the suction port 11 by induced draft is passed from below to the fillers 21, 22, 23, 24 located below it, The air that has passed upward through the filler 30 is blown upward and discharged to the outside of the cooling tower.

This blower 70, like those used in known small cooling towers, directly transmits the driving force of an electric motor 75 to an impeller 71 connected thereto, thereby rotating the impeller 71 and blowing the air in the tower body. It is a mechanism that can discharge outside the tower body and perform induced draft.

Next, the operating state of the cooling tower based on the above configuration will be described.
Circulating water as a heat medium flowing through the circulation pipeline 90 including the cooling tower 1 is, like a known cooling tower, under normal operating conditions of the cooling tower, refrigerators and air conditioners in the path of the circulation pipeline 90. etc., heat is received, the temperature is raised, and it reaches the cooling tower 1. The circulating water returned to the cooling tower 1 is first introduced into the water distribution tank 30 on the side of the tower body 10 of the cooling tower 1 through the inlet 31 and temporarily stored in the water distribution tank 30. .

The circulating water introduced into the water distribution tank 30 stays in the water distribution tank 30 for a predetermined time as the inside of the water distribution tank 30 is opened to the atmosphere through the vent hole 32, and then is connected to the lower part of the tank. It flows into one end of each watering pipe 41 of the watering part 40 . Then, the circulating water reaches the holes 42 at the bottom while heading toward the other end of the watering pipe 41, and naturally flows down through these holes 42, thereby filling the filling material 21 on the lower side of the watering part 40. Water will be sprayed on each part.

For the sprinkler 40 that sprinkles water in this way, the uppermost filler 21 is placed in close proximity to each sprinkler pipe 41 of the sprinkler 40, and each sprinkler is in an immovable state. The circulating water flowing down from the plurality of holes 42 in the lower part of the pipe 41 immediately reaches the filling material 21 and flows along it, so that the circulating water moves between the sprinkler part 40 and the filling material 21 as droplets. There is no process, and by minimizing the chance of contact between the circulating water and the air flow before reaching the filling material 21, the generation of splashes from the circulating water above the filling material 21 can be suppressed, and the circulating water can be reduced. In addition, it is possible to prevent the circulating water from splashing out of the cooling tower, thereby avoiding the adverse effects caused by the splashing of the circulating water.

The circulating water that is sprayed from each watering pipe 41 of the watering part 40 and reaches the fillers 21, 22, 23, 24 flows into the gaps between the filler sheets 25 forming the fillers 21, 22, 23, 24. As it advances and flows down along the filler sheet 25 , it comes into contact with external air that is introduced upward to the fillers 21 , 22 , 23 , 24 by the induced draft from the blower 70 . The circulating water is cooled mainly by the cooling effect due to the heat transfer (sensible heat) associated with the temperature difference between the air and the circulating water, and the cooling effect due to the evaporation heat (latent heat) of the circulating water. This will raise the temperature.

The filling materials 21, 22, 23, and 24 provided in a plurality of vertically stacked layers are stacked with the stacking direction different by 90° for each layer, and the circulating water spreads horizontally between the filling material sheets 25 and flows. By changing the direction of the filling material by 90° for each stage, the water can flow down over the entire area of the filling materials 21, 22, 23, and 24 without biasing the reaching range of the circulating water flowing down the filling material. , the contact frequency of air and water in the fillers 21, 22, 23, 24 can be increased.

After the circulating water is cooled through heat exchange with the air in the fillers 21, 22, 23, 24, it exits the filler 24, reaches the lower water tank 50, and is collected. The circulating water collected and accumulated in the lower water tank 50 passes through the strainer at the outlet of the lower water tank and then re-enters the circulation pipe 90. After returning to the cooling tower 1 and being introduced into the inlet 31 of the water distribution tank 30, the above process is repeated.

On the other hand, it was sucked into the tower body 10 from the suction port 11, passed upward through the gaps between the packing material sheets 25 forming the packing materials 21, 22, 23, and 24, and exchanged heat with the circulating water to raise the temperature. Air exits the packings 21 , 22 , 23 , 24 by the attraction of the blower 70 and travels into the tower internal space between the blower 70 and the packings 21 . The air that has reached this tower internal space is discharged outside the cooling tower by the blower 70 without being accompanied by splashes of circulating water, and the discharged air diffuses into the outside air.

During the operation of the cooling tower, the water spray pipes 41 of the water spray unit 40 are held in a stationary state, so that there is no possibility that the movable parts will stop. The state of water sprayed from the circulating water does not change over a long period of time, and cooling of the circulating water by heat exchange with the air can be stabilized.

In addition, when maintenance due to aged deterioration such as adhesion of scale or slime on each of the filler sheets 25 of the fillers 21, 22, 23, and 24 is required, one or more outer plates on the side of the tower body 10 17 is removed from the tower body 10 to open the inside of the tower body, and workers can perform work on the filling materials 21, 22, 23, and 24 from outside the cylinder body through the open portion created by removing the outer plate 17. and If necessary, the fillers 21, 22, 23, and 24 may be removed from the open portions created by removing the outer plate 17 and cleaned, or the fillers may be replaced with new ones.

As described above, in the cooling tower according to the present embodiment, the fillers 21, 22, 23, and 24 formed by stacking the filler sheets 25 are vertically arranged so that air and water can pass through them in the vertical direction. Since the filling material sheets 25 are stacked in a plurality of stages, and the stacking direction of the filling material sheet 25 is changed by 90° for each stage of the filling materials 21, 22, 23, and 24, the circulating water is supplied to each stage of the filling material 20. The surface of the filling material sheet 25 is spread in the lateral direction (longitudinal direction) to change the flow direction, widening the reach of the water flowing down, and making the water flow down over the entire area of the filling materials 21, 22, 23, 24 , the frequency of contact between air and water in the fillers 21, 22, 23, 24 can be increased to efficiently perform heat exchange.

In addition, in the cooling tower according to the above-described embodiment, the fillers 21, 22, 23, and 24 are arranged in four layers in the tower body 10, but the structure is not limited to this, and the fillers are stacked vertically. If the filling material is arranged so that the stacking direction of the filling material sheet 25 is different for each stage, the filling material may be stacked in a plurality of stages other than four stages.

In addition, when the fillers 21, 22, 23, and 24 are stacked, the filler sheets 25 are arranged so that the stacking directions of the filler sheets 25 differ by 90° for each layer, but this is not the only option. As long as the vertically overlapping and adjacent fillers are arranged in different lamination directions, the magnitude of the different angle may be any angle other than 90°.

In addition, in the cooling tower according to the above-described embodiment, each of the fillers 21, 22, 23, and 24 provided in a plurality of stacked layers has the same spacing between the stacked filler sheets 25. For example, as shown in FIG. 8, among the filling materials 21, 22, 23, 24 provided in a plurality of layers, the lowest stage on the outlet side of the circulating water and the inlet side of the air The filler 24 is formed in a laminated state in which the number of filler sheets per unit dimension in the lamination direction is increased by making the spacing between the laminated filler sheets 25 smaller than that of the filler in other stages. can also

In this case, the filling material 24 in the lowermost stage has a larger surface area by increasing the number of stacked filler sheets 25 by making the spacing between the filler sheets 25 smaller than those in the other stages. As a result, the contact area between the circulating water flowing down along each part of the lowermost filler 24 and the air is increased, and in the lowermost filler 24, heat is exchanged with the upper fillers 21, 22, and 23. Increase the opportunities for heat transfer between the circulating water whose temperature has been lowered through the suction port 11 and the low-temperature air immediately after being sucked into the tower body 10 from the suction port 11, and promote more efficient heat exchange. Therefore, even if the temperature difference between the circulating water and the air is small, the temperature of the circulating water can be sufficiently lowered.

In addition, in the cooling tower according to the above embodiment, the water sprinkling portion 40 provided inside the tower body 10 is configured to be formed by a plurality of water sprinkling pipes 41 arranged in parallel. If it is possible to spray circulating water to the filling material only from the lower part of the water spraying part while spreading the water to each part of the watering part, instead of the pipe, for example, a gutter-shaped member with an open top is not moved. may be provided side by side, and circulating water may flow down from a plurality of holes provided in the lower part of the gutter-like member.

Furthermore, in the cooling tower according to the above-described embodiment, the outer plate 17 forming the side surface of the tower body 10 is detachable from other parts of the tower body. , and the packing materials 21, 22, 23, and 24 can be handled from the outside of the tower body. Of the outer plates, only the outer plates corresponding to the ranges where the filling materials 21, 22, 23, and 24 are present have a structure that can be removed from the other part of the tower body 10, or a structure that can be opened like a door. By removing or opening the outer plate of the section, an open portion leading to the inside of the tower body is generated, and an operator can handle the packing material from the outside of the tower body through this open portion.

Reference Signs List 1 cooling tower 10 tower body 11 suction port 12 discharge port 13 opening 15 cover 16 frame 17 outer plate 21, 22, 23, 24 filler 25 filler sheet 30 water distribution tank 31 inlet 32 vent 40 sprinkler 41 watering pipe 42 hole 50 lower water tank 51 support frame 70 blower 71 impeller 75 electric motor 90 circulation pipeline

Claims (4)

While the circulating water to be cooled is sprayed against the packing material in the cooling tower body, outside air is circulated upward from below the packing material by induced draft by a fan, and at least the packing material exchanges heat between the outside air and the circulating water. In a counterflow open cooling tower,
The filling material is formed by laminating the filling material sheets, and the filling material sheets are stacked in a plurality of layers in the vertical direction so that the stacking direction is horizontal, and the stacking direction of the filling material sheets is different for each layer. A cooling tower characterized in that it is arranged in a vertical direction. In the cooling tower according to claim 1,
A sprinkling unit formed by arranging a plurality of pipes or troughs in parallel in a direction orthogonal to the longitudinal direction of the pipes or troughs with the longitudinal direction of the pipes or troughs horizontal, and arranged in a stationary state above the filling material. with
Each pipe or gutter is provided with a plurality of holes at the bottom for naturally flowing circulating water flowing into the pipe or gutter,
The cooling tower, wherein the uppermost filling material of the plurality of stages of filling material is arranged with the upper part of the filling material close to each pipe or gutter of the sprinkler section. In the cooling tower according to claim 1 or 2,
The tower body is in the form of a square tube composed of a frame formed by combining pillars and beams, and outer plates attached to the frame and forming side surfaces,
Part or all of the tower body including the range where the filling material of the predetermined outer plate is detachable from other parts of the tower body,
A cooling tower characterized in that, in a state in which said detachable skin is removed, an open portion is created in which said filler can be handled by an operator outside the tower body. In the cooling tower according to any one of claims 1 to 3,
Among the plurality of stages of the filler, the filler in the lowest stage has a smaller stacking interval of the filler sheets to be stacked than the filler in the other stages, thereby increasing the number of filler sheets per unit dimension in the stacking direction. A cooling tower characterized by being formed in a laminated state.

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