JP2617757B2 - Crossflow cooling tower - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cross-flow cooling tower.

(Prior Art) Conventionally, as this type of cross-flow cooling tower, a cross-flow cooling tower equipped with an indirect heat exchanger is mainly used, and one example thereof is described in JP-A-51-100370. The structure of the indirect heat exchanger is entirely made of synthetic resin, and has a plurality of flat vertical liquid flow passages parallel to each other and a vertical flow passage formed between the liquid flow passages. A cross-flow type having a flat surface and an air passage through which air flows, and wherein these two fluid passages are separated by a heat exchange partition plate made of a plurality of synthetic resin plates that make fluids in non-contact with each other. A heat exchanger for a cooling tower is described, wherein both walls of each air passage are formed in an inverted U-shaped member, and corrugated side walls of adjacent inverted U-shaped members are bonded to each other by protruding rib portions. And are connected to each other by a connection panel at a side edge thereof. Forming a body rundown path.

In the heat exchanger described in this publication, several heat exchangers are suspended and supported hierarchically inside a wet heat exchanger facing the outside air intake of a cross-flow cooling tower to prevent generation of white smoke in winter. Is being planned.

(Problems to be Solved) As described above, in the prior art, in order to supply a certain amount of circulating water almost simultaneously into a large number of liquid passages provided in parallel, an upper part of the indirect heat exchanger is provided with the same. Separate from
Since the circulating water distribution tank is installed in the crossflow cooling tower machine frame, the height of the crossflow cooling tower as a whole increases, and piping equipment for the distribution tank is required, and the indirect When the heat exchanger is replaced, the indirect heat exchanger first collides with the peripheral wall of the distribution tank and may be damaged, and the replacement work cannot be performed smoothly.

The present invention provides a gas-liquid non-contact type heat exchanger liquid passage in which a circulating water supply to each liquid flowing down passage in a plurality of heat exchangers constituting the heat exchanger is formed at an upper edge of the heat exchanger. It is an object of the present invention to provide a cross-flow cooling tower that can be smoothly operated without increasing the number of parts by a cooling water temporary storage section and that can easily exchange heat exchangers constituting a heat exchanger. I do.

(Means for Solving the Problems) In order to achieve the above object, a cross-flow cooling tower of the present invention is a flat thin hollow body as a whole, the inside of which is a liquid flow passage, and the upper part of the hollow body has an external part. A circulating cooling water supply part is formed which is open to the outside, and a discharge part which is open to the outside is also provided at the lower end of the liquid flow-down passage which is the lower edge of the hollow body, and most of the width of the liquid flow-down passage is provided. Is
It is a falling liquid slow part, and this falling liquid slow part horizontally distributes the obstruction seal part hierarchically over the entire surface of the hollow body over a plurality of stages, forming a meandering flow path between the obstruction seal parts. A plurality of synthetic resin heat exchangers
The ridges formed on the front and back surfaces of these heat exchangers are used as spacers, and an indirect heat exchanger formed by forming a horizontal air flow passage between adjacent heat exchangers is directly mounted in the machine frame. In the AC cooling tower, the upper edge of the hollow body is opened over the entire width, both wall plates of the upper edge project outward, and the center of the upper edge is formed into a U-shaped recess. The circulating cooling water supply section is formed at the bottom surface of the depression, and when the heat exchangers are sequentially arranged adjacent to each other, the circulating cooling water supply sections are in close contact with each other and along the upper edge of the indirect heat exchanger. It is also characterized in that the circulating cooling water temporary storage part is formed.

The falling liquid slow portion is disposed adjacent to a vertical overflow channel via at least one vertical seal portion, and is disposed.
The upper end of the vertical seal portion is in the form of a weir, and the overflow channel and the uppermost liquid reservoir in the slow-flowing liquid slowing unit communicate with each other through the weir, and the bottom of the depression is It is preferable to use a cross-flow cooling tower that is open above the uppermost liquid reservoir.

In some cases, the hollow body is made into a vacuum or blow molded product to rationalize production.

The overflow channel is provided along one side edge or both side edges of the hollow body.

The bent downflow slow portion may be separated into two or four series of fluid passages at a vertical section sealing portion at the center thereof.

According to the present invention, the indirect heat exchanger is provided adjacent to the inside of a wet heat exchanger provided to face the outside air intake of the crossflow cooling tower. This is a cross-flow cooling tower that is arranged over the entire width and height of the wet heat exchanger.

A cross-flow cooling tower in which the indirect heat exchanger is hierarchically arranged above a wet heat exchanger provided to face the outside air intake of the cross-flow cooling tower.

In the circulating water temporary storage formed along the upper edge of the indirect heat exchanger, a sprinkling pipe is horizontally disposed, and the sprinkling pipe may be branched from the sprinkling pipe to the wet heat exchanger.

The baffle seal portions may be long in the horizontal direction, distributed in multiple stages, and may be arranged at every other position.

The baffle seal portion is formed by distributing a large number of short discontinuous protrusions in the horizontal direction, and the vertical position may be inconsistent in some cases.

The discharge portion is formed by molding the center of the lower edge of the hollow body into a convex portion that matches and receives the dent, and the heat exchanger fits the dent and the convex portion and vertically stacks in multiple stages. It is desirable to use a certain cross-flow cooling tower.

The first indirect heat exchanger is arranged in parallel inside a wet heat exchanger disposed below the upper water tank of the cooling tower, and the second indirect heat exchanger is further disposed between the wet heat exchanger and the upper water tank. Indirect heat exchangers are arranged hierarchically, and the height of the first indirect heat exchanger is a value obtained by adding the heights of the wet heat exchanger and the second indirect heat exchanger. Yes, the first and second
When the supply unit of the indirect heat exchanger is open facing the water spout on the bottom surface of the upper water tank, it becomes easy to obtain dry air having a high temperature and a low relative temperature.

Among the wet heat exchangers arranged below the upper water tank of the cooling tower, the first indirect heat exchanger is arranged in parallel outside,
Further, a second indirect heat exchanger is hierarchically arranged between the wet heat exchanger and the upper water tank, and the height of the first indirect heat exchanger is equal to that of the wet heat exchanger. The height of the second indirect heat exchanger is a combined value, and among the inner and outer indirect heat exchangers, the supply portion of the inner indirect heat exchanger extends from the upper water tank. If the tip of the distribution pipe is open and the outside indirect heat exchanger supply section is open facing the water sprinkling hole on the bottom of the upper water tank, the outside air is once heated to a high temperature and then wet heat exchange is performed. To the heat exchanger and dry heat exchanger,
Suitable for obtaining high temperature dry air with low relative humidity.

(Operation of the Invention) Next, the operation of the cross-flow cooling tower according to the invention configured as described above will be described.

First, a plurality of heat exchangers are arranged side by side in a case or by connecting their side edges with a suitable connecting clip, and the ridge is used as a spacer, and a narrow width is set between adjacent heat exchangers. A horizontal air flow passage is formed, and an indirect heat exchanger having a desired width dimension is assembled. At this time, the circulating cooling water supply units are in close contact with each other, and a circulating cooling water temporary storage unit is formed along the upper edge of the indirect heat exchanger.

The heat exchanger assembled in this way is arranged inside the wet heat exchanger of the cross-flow type cross-flow cooling tower as shown in FIG. A supply pipe for supplying the circulating cooling liquid to the upper water tank above the wet heat exchanger branches off in the middle, and a valve is provided on this branch pipe to be used as a supply header to the heat exchanger group.

In this state, the blower of the cross-flow cooling tower was rotationally driven, and was heated by an air conditioner or a refrigerator as a load (30).
Cooling water, which is a circulating refrigerant, is temporarily stored in the circulating cooling water temporary storage section formed along the upper edge of the indirect heat exchanger in close contact with the circulating cooling water supply sections through the supply header. After that, it is supplied all at once into the falling liquid slowing section through the circulating cooling water supply section of each of the heat exchangers. The cooling water thus supplied flows down sequentially while meandering in a meandering flow path formed between the baffle seal portions, and comes into contact with both wall plates of the heat exchanger while being sufficiently stirred, and is simply vertical. Contact with the both wall plates for a much longer time than flowing down, and exchange heat with the air flowing horizontally through the air flow passages through the two wall plates, loosen them, and at the same time, Heat is taken and it is cooled accordingly.

By arranging this group of heat exchangers inside the moisture heat exchanger, all the air that has cooled directly in contact with the cooling water on the wet type heat exchanger and raised the temperature by itself has increased the relative humidity. It flows into all the air flow passages of the group.

On the other hand, the cooling water flowing meandering down the curved falling liquid slow portion of the heat exchanger is indirectly cooled by the air passing through the air passage during the flow, and the cooling water is cooled by itself. The heated air is exhausted from the exhaust port to the outside of the cross-flow cooling tower without white smoke.

The falling liquid slowing portion is disposed adjacent to a vertical overflow channel via at least one vertical seal portion,
The upper end of the vertical seal portion is in the form of a weir, and the overflow channel and the uppermost liquid reservoir in the slow-flowing liquid slowing unit communicate with each other through the weir. If the cooling water supply is pulsated, or if the supply is temporarily increased, or if the cooling liquid is slowly flowing down, Microorganisms and the like adhere to the liquid, the cross-sectional area of the flowing-down liquid slow path narrows, the flow rate decreases, the water level in the liquid reservoir rises, and becomes higher than the weir, part of the cooling water passes through the overflow channel. It flows directly down and does not overflow outside the heat exchanger.

When the heat exchanger is replaced after a long period of use, when the circulating cooling water supply sections are closely connected to each other, the sprinkling pipe is located in the circulating cooling water temporary storage section formed along the upper edge of the indirect heat exchanger. Then remove the heat exchanger from the case, release the abutting condition of the adjacent heat exchangers, separate each heat exchanger one by one, After removing microorganisms and the like adhering to the inside of the slow speed section and cleaning it, assemble predetermined sheets again as a bundle.
As an indirect heat exchanger, it is loaded into the cross-flow cooling tower body and reused.

During the operation of the cross-flow cooling tower, the supply portions of the heat exchangers are open to the outside air, and the cooling water flows down the slow-flowing liquid slowly in a meandering manner. And
At the same time as the operation of the cross-flow cooling tower is stopped, the tower receives the atmospheric pressure and is discharged from the discharge part to the outside.

In the case where the discharge portion is formed as a depression and a convex portion that fits into the depression of the lower heat exchanger is formed at the center of the lower edge of the hollow body, the heat is provided inside the wet heat exchanger. The exchange body fits the dent and the convex part, and stacks the heat exchanger in multiple stages by stacking the heat exchangers in the upper and lower stages. The circulating cooling water is inserted into the recess and supplied to the heat exchangers arranged in a hierarchical structure in order to be cooled. The first indirect heat exchanger is arranged in parallel inside a wet heat exchanger disposed below the upper water tank of the cooling tower, and the second indirect heat exchanger is further disposed between the wet heat exchanger and the upper water tank. Indirect heat exchangers are arranged hierarchically, and the height of the first indirect heat exchanger is a value obtained by adding the heights of the wet heat exchanger and the second indirect heat exchanger. The operation of the cross-flow cooling tower in which the supply portions of the first and second indirect heat exchangers are open facing the water spout on the bottom surface of the upper water tank is as follows.

The circulating cooling water sprinkled from the bottom of the upper water tank flows into the falling liquid slow part through the supply portions of the respective hollow bodies of the second indirect heat exchanger, and flows down in a zigzag manner. During this flow, the circulating cooling water is indirectly cooled by a part of the air taken in from the outside air inlet of the cooling tower, and then all is sprayed from the discharge portion onto the wet heat exchanger, and the surface of the wet heat exchanger is surfaced. And comes into direct contact with the residual air taken in
It is cooled to a predetermined temperature by the action of latent heat. On the other hand, the dry air heated during the passage through the second indirect heat exchanger and the humid air heated during the passage through the wet heat exchanger are both air passages of the first indirect heat exchanger. The indirect cooling of the circulating cooling water flowing into each hollow body of the first indirect heat exchanger and increasing the temperature of the circulating cooling water by itself, as dry air having a reduced absolute humidity, is performed by the first indirect type heat exchanger. The air discharged from the air passage of the heat exchanger is suctioned upward toward the exhaust port, and the dry air and the humid air having different absolute humidity are further mixed by the rotating blades of the blower provided at the exhaust port, It is exhausted from the exhaust port without becoming supersaturated air and does not turn into white smoke.

Among the wet heat exchangers arranged below the upper water tank of the cooling tower, the first indirect heat exchanger is arranged in parallel outside,
Further, a second indirect heat exchanger is hierarchically arranged between the wet heat exchanger and the upper water tank, and the height of the first indirect heat exchanger is equal to that of the wet heat exchanger. The height of the second indirect heat exchanger is a combined value, and among the inner and outer indirect heat exchangers, the supply portion of the inner indirect heat exchanger extends from the upper water tank. The function of the cross-flow cooling tower, which is open at the tip of the distribution pipe to be opened and the supply part of the outer indirect heat exchanger faces and opens to the bottom water sprinkling hole of the upper water tank, is as follows.

A part of the circulating cooling water sprinkled from the bottom of the upper water tank flows into the falling liquid slow part through the supply parts of the respective hollow bodies of the outer first indirect heat exchanger located near the outside air intake and flows into the zigzag. It flows in a meandering manner. During this flow, the circulating cooling water is indirectly cooled by a part of the air taken in from the outside air intake of the cooling tower, and the air rises in temperature and its relative humidity decreases.

Further, the remaining part of the circulating cooling water flows into the flowing liquid slow part through the supply part of each hollow body of the second indirect heat exchanger, and flows down in a zigzag manner. Then, the temperature rises while passing through the air passage of the first indirect heat exchanger tower on the outside, and a part of the air whose absolute humidity has been lowered indirectly flows in the meandering flow through the slow liquid falling section. The circulating cooling water is cooled, and thereafter, is sprayed from the discharge portion onto the wet heat exchanger, and directly contacts with the residual air taken along the surface of the wet heat exchanger and taken into the flow, thereby forming a latent heat effect of vaporization. Then, it is cooled to a predetermined temperature. On the other hand, the dry air further heated during the passage through the second indirect heat exchanger and the humid air heated during the passage through the wet heat exchanger are both connected to the first indirect portion near the exhaust port. Is introduced into the air passage of the mold heat exchanger, and indirectly cools the circulating cooling water that is supplied to the respective hollow bodies of the first indirect heat exchanger from the supply section through the distribution pipe and flowing down, The air discharged from the air passage of the first indirect heat exchanger as dry air whose temperature has been increased and the absolute humidity has been lowered rises toward the exhaust port, and rises during the rotation of the blower provided at the exhaust port. The dry air and the humid air having different absolute humidities are further mixed by the blades and are not exhausted from the exhaust port without becoming supersaturated air and do not atomize.

The description of the operation is in winter or when the outside air is low temperature, and in other summer or when the outside air is high temperature, the valve of the supply header is closed and the circulating cooling water to the heat exchanger is closed. Stop supply.

The valve may be a three-way switching valve to adjust the ratio of the amount of circulating cooling water supplied to the wet heat exchanger and the indirect heat exchanger according to the cooling temperature.

(Effect of the Invention) In the cross-flow cooling tower according to the specific invention, which is configured and operates as described above, the plurality of heat exchangers constituting the heat exchanger can be provided without separately providing an upper water tank. The supply of the circulating water to each liquid passage can be smoothly performed without increasing the number of parts by the circulating cooling water temporary storage portion formed at the upper edge of the heat exchanger, and the heat exchanger constituting the heat exchanger can be exchanged. Can be easily performed.

If the hollow body is a vacuum or blow molded product, the production of this heat exchanger is easy and inexpensive.

In the case where the overflow channel is provided along one side edge of the hollow body, if the supply amount of the cooling water pulsates, or if the supply amount temporarily increases, or if the supply amount of the cooling water is slow, Microorganisms and the like adhere to the liquid, the cross-sectional area of the flowing-down liquid slow path narrows, the flow rate decreases, the water level in the liquid reservoir rises, and becomes higher than the weir, part of the cooling water passes through the overflow channel. There is an effect that the water does not directly flow down and does not overflow out of the heat exchanger. If the overflow channel is provided along both side edges of the hollow body, the effect relating to the overflow channel can be doubled.

If the central part of the bent downflow liquid slow part is separated into two or four series of fluid passages at a vertical obstacle seal part, the circulating cooling water is uniformly distributed over the entire heat exchanger. it can.

A cross-flow cooling tower in which the indirect heat exchanger is arranged over the entire width and height of the wet heat exchanger inside a wet heat exchanger provided facing the outside air intake of the cross-flow cooling tower. In this case, the heat exchanger can be easily stacked in multiple stages according to the height of the wet heat exchanger, and all the moist air that has passed through the filler is taken into the air flow passage of the indirect heat exchanger. By heating, the absolute humidity can be reduced and the air can be exhausted from the exhaust port without forming supersaturated air, so that the generation of white smoke can be better prevented.

The cross-flow cooling tower is a cross-flow cooling tower in which the indirect heat exchanger is hierarchically arranged on the upper part of the wet heat exchanger provided facing the outside air intake of the cross-flow cooling tower, and the discharge unit is further configured as In the case where the lower edge of the hollow body is formed so as to open over the entire width, the circulating cooling water can be discharged from the heat exchanger quickly and in a large area, and the wet heat exchanger is mounted at a lower portion of the heat exchanger. Circulating cooling water can be evenly sprayed from above on the entire area of this wet heat exchanger and the outside air can be passed between the upper heat exchangers to raise the temperature further. Dry air can be obtained, and atomization in winter can be effectively prevented.

In the circulating water temporary storage part formed along the upper edge of the indirect heat exchanger, a sprinkler pipe is horizontally disposed, and when the sprinkler pipe branches off from the sprinkler pipe to the wet heat exchanger,
The liquid that is sprayed on the heat exchanger and the heat exchanger is common,
Since the pipe parts are shared, the pipe structure can be further simplified, and circulating cooling water can be supplied to the liquid flow passage of each heat exchanger to exchange heat without using power in a natural flow manner. The first indirect heat exchanger is arranged in parallel inside a wet heat exchanger disposed below the upper water tank of the cooling tower, and the second indirect heat exchanger is further disposed between the wet heat exchanger and the upper water tank. Indirect heat exchangers are arranged in a hierarchy, the height of the first indirect heat exchanger is a value obtained by adding the height of the filler and the second indirect heat exchanger, In a cross-flow type cooling tower in which a supply section of the first and second indirect heat exchangers is open facing a watering hole on a bottom surface of an upper water tank, the first and second indirect type heat exchangers are provided. By the action of the heat exchanger, high-temperature and low-humidity air can be easily obtained under the blower provided at the exhaust port, and it can be exhausted from the exhaust port without using supersaturated air, so white smoke is more reliably prevented. it can.

Among the wet heat exchangers arranged below the upper water tank of the cooling tower, the first indirect heat exchanger is arranged in parallel outside,
Further, a second indirect heat exchanger is hierarchically arranged between the wet heat exchanger and the upper water tank, and the height of the first indirect heat exchanger is equal to that of the wet heat exchanger. The height of the second indirect heat exchanger is a combined value, and among the inner and outer indirect heat exchangers, the supply portion of the inner indirect heat exchanger extends from the upper water tank. In the cross-flow cooling tower, which is open at the end of the distribution pipe that is open and the supply section of the outer indirect heat exchanger faces the bottom water sprinkling hole of the upper water tank, all of the air taken in from the outside air inlet After reducing the absolute humidity of the outside air which has been heated to a higher temperature in the outer first indirect heat exchanger, the wet air can be supplied to the wet heat exchanger and the second indirect heat exchanger. Dry air with low humidity can be obtained at the same time as cooling of the circulating cooling water. White smoke generation can be more reliably prevented in the winter because it exhausted from.

(Example) Next, a typical example of the cross-flow cooling tower of the present invention will be described.

Example 1 In FIG. 1, reference numeral 10 denotes a heat exchanger.
10 is preferably a flat hollow body made of a synthetic resin formed by vacuum molding or blow molding, and the inside thereof is a liquid flow passage. The synthetic resin is not particularly limited, but may be polyvinyl chloride, polyethylene, polypropylene, or the like. An inexpensive one with good moldability is preferred.

The upper edge 20 of the hollow body 10 is opened over its entire width, the two wall plates 14 and 15 of the upper edge 20 project outward, and the upper edge
The center of the recess 20 is formed into a U-shaped recess 20a, and the bottom surface of the recess 20a forms the circulating cooling water supply unit 11.

When the heat exchangers 10 are sequentially arranged adjacent to each other, a circulating cooling water temporary storage portion 20b is formed which abuts and adheres to the circulating cooling water supply portions 11 and extends in the longitudinal direction (FIG. 1). , FIG. 5).

The hollow 20 is provided at the center of the lower edge 21 of the hollow body 10.
A convex portion which is designated by a and is fitted to the depression 20a of the hollow body 10 as the lower heat exchanger is formed, and this convex portion is used as the discharge portion 12.

A peripheral seal portion 16 formed by welding both wall plates 14 and 15 is formed around the hollow body 10 which is the heat exchange body, and is parallel to the side edges 17 and 18 of the heat exchange body 10 and from both side edges 17 and 18. At a position slightly inside, the side wall plates 13 and 14 are
The vertical seal portions 19 are formed by welding together along the upper and lower ends, and the upper and lower edges of the two right and left vertical seal portions 19 do not reach the upper and lower edges 20, 21 of the heat exchanger 10, respectively.

At the central portion of the two right and left vertical seal portions 19, a horizontally long obstruction seal portion 22 in which the two wall plates 14 and 15 are welded to each other is hierarchically distributed over a plurality of steps over the entire surface. These obstructing seal portions 22 are disposed at every other position, and the flowing liquid slow portion that occupies most of the width of the liquid flowing passage as the meandering flow passage 23 between these seal portions 22.
24 are formed, and both wall plates in the downflow liquid slow section 24 are formed.
14 and 15 are the main heat exchange surfaces of the heat exchanger 19.

The shape of the baffle seal portion 22 is not limited to this, and a large number of short discontinuous protrusions 22C are distributed in the horizontal direction, and the position of these protrusions 22C is sequentially inconsistent in the vertical direction, so that the flowing-down liquid slow portion is formed. 24 may be formed (see FIG. 8).

On the other hand, a narrow vertical portion between each vertical seal portion 19 and each side edge 17, 18 is an overflow channel 25, and the upper end 26 of the vertical seal portion 19 is shaped as a weir, and the obstruction seal Of the parts 22, the uppermost one 22a is formed slightly lower than the upper end 26, and the uppermost obstruction seal part is formed.
A liquid reservoir 40 is formed by 22a, the upper edge 20 of the hollow body, and the two wall plates 14, 15. The liquid reservoir 40 and the overflow channel 25 correspond to the weir 26
Are in communication with each other.

In the case of the drawing, the flowing-down liquid slow portion 24 is divided into two series of fluid passages 23a and 23b by a vertical obstruction seal portion 50 at the center except for the liquid reservoir 40 in the case shown.

A raised portion 70 is formed on the outer surfaces of the wall plates 14 and 15 as a spacer.

The overflow channel 25 may be provided only on one side edge 17 or 18.

The heat exchangers 10 formed in this manner are arranged in parallel using a plurality of cases or an appropriate support frame (not shown), and the raised portions 70 are used as a kind of spacer, so that the heat exchangers 10 are narrow to the adjacent heat exchangers 10. A horizontal air flow passage 33 having a width is formed, and an indirect heat exchanger B having a desired size is assembled.

The indirect heat exchanger B assembled in this manner is arranged inside the wet heat exchanger C of the crossflow cooling tower A. On this occasion,
A pipe E for supplying the circulating coolant to the upper water tank D above the wet heat exchanger C branches off from the middle, and a valve G is provided on the branch pipe F, and a distribution pipe H connected to the end of this pipe.
The circulating water cooling liquid reservoir 20 extending in the longitudinal direction.
in b, piping horizontally the sprinkler holes H ₁ facing downward (see Figure 6).

The operation and effect of the cross-flow cooling tower A of this embodiment configured as described above are as follows.

The blower 1 of the cooling tower A is rotationally driven, and circulating cooling water as a circulating refrigerant warmed (about 30 to 70 ° C.) by a load unit K such as an air conditioner or a refrigerator as the load unit is circulated through the distribution pipe H. A circulating cooling water temporary storage unit formed along the upper edge of the indirect heat exchanger B in close contact with the cooling water supply units 11
After the liquid is once stored in the circulating cooling water supply section 11, the liquid is supplied into the falling liquid slow section 24 all at once. The cooling water supplied in this manner sequentially flows down the meandering flow path 23 formed between the obstruction seal portions 22 and comes into contact with the respective wall plates 14 and 15 while being sufficiently stirred. It is in contact with the wall plates 14 and 15 for a long time, and the air
Heat is exchanged with the air flowing in the horizontal direction in a non-contact manner to heat them, and at the same time, the heat is taken from the air by itself and cooled accordingly.

When a plurality of heat exchangers 10 are arranged in a plurality of layers in a hierarchical manner inside the wet heat exchanger C (see FIG. 6), the heat exchangers 10 are directly contacted with the cooling water on the wet heat exchanger C. Then, all of the humid air, which has cooled and heated itself to have an increased absolute humidity, flows into all the air flow passages 33 of the heat exchanger 10 inside.

On the other hand, the cooling water meandering down the curved falling liquid slow section 24 of the upper heat exchanger 10 flows into the falling liquid slow section 25 of the lower heat exchanger 10 from its supply port 11 sequentially. The cooling water flowing down is indirectly cooled by the humid air passing through the air passage 33, and the air whose temperature has risen and the absolute humidity has decreased by this cooling is not converted into supersaturated air. Exhaust gas is exhausted from the cooling tower to the outside of the cooling tower and does not turn into white smoke (see Fig. 6).

If the supply amount of the cooling water pulsates, or the supply amount temporarily increases, or microorganisms adhere to the falling liquid slow section 24, the cross-sectional area of the falling liquid slow section 24 becomes narrow. When the flow rate decreases and the water level of the liquid reservoir 40 rises and becomes higher than the weir 26, part of the cooling water directly flows down through the overflow channel 25,
It does not overflow from the upper edge 20 of the heat exchanger 10.

During the operation of the cooling tower A, the circulating cooling water supply section 11 of each heat exchanger 10 is open to the outside air, and the cooling water flows down the meandering liquid slowing section 24 in a natural flow manner. I will do it. At the same time when the operation of the cooling tower A is stopped, the cooling water is discharged from the discharge part 12 to the outside by receiving the atmospheric pressure.

In this way, the circulating cooling water is supplied to each heat exchanger 10 and the air is caused to flow horizontally in the air passage 33 between the heat exchangers 10 so that the air and the circulating cooling are Non-contact heat exchange between water.

When this heat exchanger 10 is used as a closed type heat exchanger 10, a discharge header (not shown) similar to the supply header is connected to these discharge ports 12 to circulate and cool the inside. It goes without saying that the liquid is used without being mixed with the spray water sprayed on the outer surface of each heat exchanger 10.

Further, the wet heat exchanger in the case of the discharge portion 12 of the hollow body of the lower edge 21 heat exchanger 10 to open the full width formed by forming (FIG. 9 see) crossflow cooling towers A ₀ equipped with The group of 10 heat exchangers is arranged on the upper part of C, and is used for uniformly distributing cooling water to the part C on the filler, and mixes dry air with low absolute humidity and humid air rising from below. However, the air can be exhausted from the exhaust port without using supersaturated air, and the generation of white smoke can be prevented (see FIG. 7).

A three-way switching valve is used as the valve G, and a flow rate of circulating cooling water supplied to the filler C in accordance with a cooling temperature;
In some cases, the ratio of the supply flow rate of the circulating cooling water to the indirect heat exchanger B may be adjusted. That is, when the cooling temperature is high as in winter, the flow rate of the circulating cooling water supplied to the wet heat exchanger is reduced, and when the cooling temperature is low as in summer, the circulation water to be supplied to the wet heat exchanger is reduced. The three-way switching valve can be switched and used so as to increase the flow rate of the cooling water.

Even if the indirect heat exchanger B is arranged below the upper water tank D in parallel with the wet heat exchanger C, it is the same as the cross-flow cooling tower of the present invention. This eliminates the need for the branch pipe F and the valve G, and simplifies the piping structure.

A representative embodiment of claim 13 is shown in FIG. This second
In FIG. 10, the first indirect heat exchanger is provided inside a wet heat exchanger C disposed below an upper water tank D of the cooling tower A.
B ₁ are arranged in parallel, and the wet heat exchanger C and the upper water tank D
A second of said Yes disposed indirect heat exchanger B ₂ hierarchically, the value of the combined first of said indirect height of the heat exchanger B ₁ between the first, second The supply unit 11 of the indirect heat exchangers B ₁ and B ₂ is open to the water sprinkling hole D ₁ on the bottom surface of the upper water tank D. The operation and effect of this embodiment are the same as those of the invention,
The effect is the same, and dry air having a high temperature and a low absolute humidity, that is, non-saturated air is easily obtained.

A representative embodiment of claim 14 is shown in FIG. Of the first 11 wet heat exchanger disposed below the upper water tank D of the cooling tower A in Figure C, first the indirect type heat exchanger B ₁ located outside, the wet heat exchanger C and Yes hierarchically arranging the second of said indirect heat exchanger B ₂ between the upper water tank D, a first height of said indirect heat exchanger B ₁ represents said wet heat exchanger C There as a value that matches the second height of said indirect heat exchanger B _2, said, among the outside of the indirect heat exchanger B _1, the supply portion 11 of the inner indirect heat exchanger B ₁ in is open tip distributing pipes H extending from the upper water tank D, the supply portion 11 of the outer indirect heat exchanger B ₁ represents an opening facing the nozzle holes D ₁ of the bottom surface of the upper water tank D I have. The operation and effect of this embodiment are the same as those of the above-described invention. The temperature of the outside air is once increased and then supplied to the wet heat exchanger and the drying heat exchanger, and the high-temperature dry air having a low absolute humidity, ie, non-supersaturated Suitable for getting air.

The above-described operation is described in the case where the temperature is low in winter or the outside air, and in the other summer or when the temperature of the outside air is high, the valve G of the supply header is closed and the heat exchanger 10 is closed.
The supply of circulating cooling water to the

[Brief description of the drawings]

The drawings relate to the present invention. FIG. 1 is a front view of a first embodiment of this heat exchanger, FIG. 2, FIG. 3, and FIG. FIG. 5 is a side view showing a state in which the heat exchangers of FIG. 1 are arranged in parallel, and FIG. 6 is a schematic view showing an embodiment of a cross-flow cooling tower. ,
FIG. 7 is a schematic view of another embodiment of the cross-flow cooling tower, FIG. 8 is a partial front view showing the shape of another obstruction seal portion of the heat exchanger, and FIG. FIGS. 10 and 11 are partial front views showing another embodiment and schematic diagrams showing another embodiment of a cross-flow cooling tower. Main symbols in the drawing 10: heat exchanger, 11: circulating cooling water supply unit, 12: discharge unit, 20a: U-shaped depression, 23: meandering channel, 24: flowing down liquid Hayate, 25 ... Overflowing channel.

Claims (14)

(57) [Claims] 1. A thin, thin hollow body as a whole, wherein the inside is a liquid flow-down passage, and a circulating cooling water supply part which is open to the outside is formed on the upper part of the hollow body, and a lower edge of the hollow body is provided. There is also provided a discharge part which is open to the outside at the lower end of the liquid flow-down passage, and most of the width of the liquid flow-down passage is a flowing-down liquid slowing portion, and the flowing-down liquid slowing portion extends in the horizontal direction. A baffle seal portion is hierarchically distributed over the entire surface of the hollow body over a plurality of stages, and a plurality of synthetic resin heat exchangers each having a meandering channel formed between the baffle seal portions are arranged adjacent to each other. A cross-flow type in which an indirect heat exchanger, which is formed by forming a horizontal air flow passage between adjacent heat exchangers using the raised portions formed on the front and back surfaces of the exchanger as spacers, is mounted in the machine frame. In the cooling tower, open the upper edge of this hollow body over the entire width. Both wall plates of the upper edge project outward, and the center of the upper edge is formed into a U-shaped recess, and the bottom surface of the recess forms the circulating cooling water supply section, When the heat exchangers are sequentially arranged adjacent to each other, the circulating cooling water supply parts are closely in contact with each other, and a circulating cooling water temporary storage part is formed along the upper edge of the indirect heat exchanger, a cross-flow type. cooling tower. 2. The downflow liquid slow portion is disposed adjacent to a vertical overflow channel through at least one vertical seal portion, and the upper end of the vertical seal portion is shaped as a weir. Through the weir, the overflow channel and the liquid reservoir at the uppermost stage in the slowing down liquid portion are interconnected,
2. The cross-flow cooling tower according to claim 1, wherein the bottom of the depression is open above the uppermost liquid reservoir. 3. The cross-flow cooling tower according to claim 1, wherein said hollow body is a vacuum or blow molded product. 4. A cross-flow cooling tower according to claim 2, wherein said overflow channel is provided along one side edge of said hollow body. 5. A cross-flow cooling tower according to claim 2, wherein said overflow channel is provided along both side edges of said hollow body. 6. The system according to claim 1, wherein said bent downflow slow portion is separated into two to four series fluid passages by a vertical partition seal portion at a central portion thereof. Crossflow cooling tower. 7. The indirect heat exchanger is disposed inside the wet heat exchanger provided facing the outside air intake of the cross-flow cooling tower over the entire width and height of the wet heat exchanger. The cross-flow cooling tower according to claim 1. 8. A cross-flow cross-flow cooling tower in which the indirect heat exchanger is hierarchically arranged above a wet heat exchanger provided facing the outside air intake of the cross-flow cooling tower. The cross-flow cooling tower according to claim 1, wherein: 9. A sprinkling pipe is horizontally arranged in a circulating water temporary storage section formed along the upper edge of the indirect heat exchanger in the cross-flow cooling tower according to claim 7 or 8. A sprinkling pipe branching from the sprinkling pipe to the wet heat exchanger. 10. The cross-flow cooling tower in the cross-flow cooling tower according to claim 1 is long in the horizontal direction, is distributed in multiple stages, and is displaced every other position. A cross-flow cooling tower characterized by the following. 11. A cross-flow cooling tower in a cross-flow cooling tower according to claim 1, wherein a large number of short discontinuous protrusions are distributed in a horizontal direction, and vertical positions are sequentially inconsistent. A cross-flow cooling tower characterized by the following. 12. The discharge part is formed by molding a convex part which fits into the depression and fits into the depression of the lower heat exchanger at the center of the lower edge of the hollow body. 2. The cross-flow cooling tower according to claim 1, wherein the upper part and the lower part are fitted and stacked vertically. 13. The first indirect heat exchanger is arranged in parallel inside a wet heat exchanger disposed below an upper water tank of the cooling tower, and furthermore, a first heat exchanger is disposed between the wet heat exchanger and the upper water tank. Second
The indirect heat exchangers are arranged in a hierarchy, and the height of the first indirect heat exchanger is the same as the height of the wet heat exchanger and the height of the second indirect heat exchanger. The supply unit of each of the first and second indirect heat exchangers is open facing a water sprinkling hole on a bottom surface of an upper water tank.
Cross-flow cooling tower according to the item. 14. A wet heat exchanger disposed below an upper water tank of the cooling tower, wherein the first indirect heat exchanger is arranged outside in parallel, and the wet heat exchanger and the upper water tank are arranged in parallel. The second indirect heat exchanger is arranged in a hierarchy between the first indirect heat exchanger and the height of the first indirect heat exchanger is the height of the wet heat exchanger and the height of the second indirect heat exchanger. The combined height, the inner, of the indirect heat exchanger on the outside, the supply portion of the inner indirect heat exchanger, the tip of the distribution pipe extending from the upper water tank is open, 2. The cross-flow cooling tower according to claim 1, wherein a supply portion of the outer indirect heat exchanger faces and opens to a water sprinkling hole on a bottom surface of the upper water tank.