JP2002115980A - Upper water bath for dc/ac-type cooling tower, and dc/ac- type cooling tower having white smoke prevention function having the upper water bath - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent white smoke from being generated in winter, and in a middle period by appropriately supplying or stopping supplying scattered water to a passage for both dry and wet air by adjusting water level in an upper water bath. SOLUTION: The passage 12 for both dry and wet air and a wet-type air passage 13 are arranged adjacently in the width direction of a fresh air-taking opening at the lower portion of the upper water bath 11 for a DC/AC-type cooling tower having a number of water-scattering holes at the bottom surface. A partition plate 14 is arranged nearly vertically inside the upper water bath 11 corresponding to the boundary between the passage 12 for both dry and wet air and the wet-type air passage 13, and is formed to be lower than the peripheral wall of the upper water bath 11, thus forming a water-scattering section for the passage 12 for both dry and wet air. Concretely, the partition plate 14 is in a closed-loop, flat, nearly rectangular or oval shape, and a partial water bath 14A that is one type of the water-scattering section for allowing scattered water to flow to the passage 12 for both dry and wet air is formed in the upper water bath 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper water tank for a cross-flow cooling tower and a cross-flow cooling tower using the upper water tank.

[0002]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an upper water tank for a cross-flow cooling tower in which a spray water supply system is simplified, and a cross-flow cooling tower using the upper water tank. It is in. Another object of the present invention is to provide a cross-flow type in which, by adjusting the water level in the upper water tank, the supply of spray water to the dry / humidified air passage is appropriately stopped and stopped, and the generation of white smoke can be prevented in winter and in the middle. To provide a cooling tower to the market.

[0003]

In order to achieve the above-mentioned object, a specific invention is directed to a method of forming a dry-humid air in a flow direction of air below an upper water tank for a cross-flow type cooling tower having a large number of water holes formed in a bottom surface. A combined passage and a wet air passage are arranged adjacent to each other in the width direction of the outside air intake, and both of these passages are equipped with a closed heat exchanger. In the upper water tank used for the cooling tower having a function of stopping spraying of the spray water and preventing the generation of white smoke, the upper water tank has a boundary between the dry / humid air passage and the wet air passage. Then, the partition plate is disposed vertically, this partition plate is lower than the peripheral wall of the upper water tank, forming a sprinkler for the dry / humid air combined passage,
An upper water tank for a cross-flow cooling tower, characterized in that a partial dispersion water supply part connected to a region corresponding to the wet air passage is provided.

In order to achieve the above object, the partition plate has a closed loop and is formed in a rectangular or oval shape in a plane, and a partial water tank for flowing spray water to the dry / humid air passage in the upper water tank is used for the dry / humid air. Each of the partial water tanks is formed on the passage, and at the bottom of the partial water tank, at least one row of watering holes is formed at intervals along the longitudinal direction, and an area corresponding to the wet air passage is an upper part. It is characterized by being formed so as to communicate with each other in the water tank.

In order to achieve the above object, the upper water tank comprises a pair of upright side walls and both end walls connected thereto, and the both end walls in the longitudinal direction are separated from the inner peripheral wall of the upper water tank. And the upper part of this partial aquarium is open. In order to achieve the above object, the ratio of the plane area of the upper water tank and the upper water tank is as follows:
The ratio is 1: 4 to 1: 5, and all sprinkling holes have the same hole diameter. In order to achieve the above object, the height of the partition plate or the partial water tank in the upper water tank is at least two kinds of heights, and the tall one is used for preventing the generation of white smoke in the middle and winter seasons. The low profile is for preventing the generation of white smoke in winter.

[0006] In order to achieve the above object, a related invention includes:
Closed heat exchange coils are arranged in multiple stages vertically below the upper water tank.The supply ends of these sealed heat exchange coils are on a common supply header on the exhaust port side, and the discharge end is on the outside air intake side. A plurality of heat exchange plates, each connected to a common discharge header and forming the dry / wet / air passage so as to cross the closed heat exchange coil of each stage, constitute a set, and a plurality of heat exchange plates are provided. The dry / wet air passage and the wet air passage are arranged adjacent to each other in the width direction of the outside air inlet, and are fixed to the closed heat exchange coil at intervals in the width direction of the inlet. A cross-flow cooling tower with a function to prevent white smoke, wherein the passed air flows are mixed in a common mixing chamber and exhausted from a common exhaust port, wherein the upper water tank is the upper water tank according to claim 1 or 5. Forming the passage for both wet and dry air, The upper end of the heat exchange plate is watertightly connected to the bottom surface of the upper water tank at the lower edge of the partition plate, and pumps down the passage and collects the spray water collected in the lower water tank to an area equivalent to the wet air passage. Is provided as a cross-flow cooling tower with a white smoke prevention function.

[0007] In order to achieve the above object, a related invention includes:
Closed heat exchange coils are arranged in multiple stages vertically below the upper water tank.The supply ends of these sealed heat exchange coils are on a common supply header on the exhaust port side, and the discharge end is on the outside air intake side. A plurality of heat exchange plates, each connected to a common discharge header and forming the dry / wet / air passage so as to cross the closed heat exchange coil of each stage, constitute a set, and a plurality of heat exchange plates are provided. The dry / wet air passage and the wet air passage are arranged adjacent to each other in the width direction of the outside air inlet, and are fixed to the closed heat exchange coil at intervals in the width direction of the inlet. A cross-flow cooling tower with a white smoke prevention function, wherein the passed air flows are mixed in a common mixing chamber and exhausted from a common exhaust port, wherein the upper water tank is provided.
3. The upper / lower water tank according to 3, 4 or 5, wherein each of the dry / humid air passages is disposed below the partial water tank in the upper water tank, and is arranged separately from the wet / air passage, and each of the dry / humid air passages is arranged in the upper water tank. The upper end of each of the outermost heat exchange plates to be formed is connected to the bottom of the upper water tank in a watertight manner at the lower edge of the partial water tank, and the spray water collected in the lower water tank flowing down the passage is passed through the wet air passage. A cross-flow cooling tower with a function to prevent white smoke, characterized in that a variable displacement pump is provided for pumping and supplying to a considerable area.

In order to solve the above problem, a watertight connection between an upper end of each heat exchange plate and a bottom surface of the upper water tank in the crossflow cooling tower is provided with a partition wall connected to a lower edge position of the partition plate. A lower nip groove into which the upper edge of the heat exchange plate can be inserted is formed at the lower edge of the partition plate, and the heat exchange plate is inserted and connected to the nip groove for watertight connection. It is preferable that the first and second parts constitute a part. In order to solve the above-mentioned problem, the upper edge of the partition plate in the crossflow cooling tower is connected to the same position as the partition plate of the upper water tank by fixing means such as welding, bonding, and screwing. It is desirable to be characterized.

The operation of the first, second, and fifth aspects of the invention will be described together with the operation of the sixth, ninth, and tenth aspects of the invention. In the spring and summer, the water level of the spray water in the upper tank of the cooling tower is higher than the upper edge of the partition plate, and from the entire bottom surface of the upper tank, all of the lower heat exchange coils and the heat exchanger plates of each set The spray water is sprayed on the dry / humid air shared passage to indirectly cool the circulating cooling water circulating in the heat exchange coil.

Next, in the middle of the hot and humid period, such as the rainy season in Japan, when white smoke is likely to be generated, the following effect is obtained. The pumping amount of the spray water is adjusted by the pump, and the water level of the spray water in the upper tank of the cooling tower is higher than the upper edge of the tall one of the partition plates and higher than that of the lower one, and The spray water stops flowing into the water spraying section beyond the high partition plate, and the spray water is sprayed on the dry / humid air shared passage corresponding to the region surrounded by the tall partition plate. And the dry / wet air shared passage formed by the heat exchange plates of each set is a dry air exclusive passage. Since the water level is higher than the shorter one of the partition plates, the spray water flows over these partition plates, so that the spray water is sprayed from the spray portion into the corresponding dry / humid air passage. In the wet air passage, spray water is sprayed from each spray hole on the bottom surface of the upper water tank, and circulating cooling water and spray water flowing in the heat exchange coil perform heat exchange indirectly. In the above, the spray water is cooled by an external air flow and discharged to the exhaust side as humid air. On the other hand, in the passage for exclusive use of dry air, the circulating cooling water is indirectly air-cooled by an external air flow, and the heated air is discharged to the exhaust port as dry air, and the exhaust port is formed as a mixed flow of wet air and dry air. The air flow is raised to a high temperature and low humidity as a whole, and discharged from the exhaust port in a non-supersaturated state to prevent the generation of white smoke. At this time, the spray water flowing down in the gas-liquid contact passage due to the partition plate does not flow into the dry air exclusive passage over all stages.

In winter, the water level of the spray water in the upper tank of the cooling tower is further lowered, and
Lower than the upper edge of a short one, to stop the spray water from flowing into the watering section over all the partition plates,
The spraying of the spray water to all the dry / humid air passages is stopped, and the dry / humid air shared passages formed by the heat exchange plates of the respective sets are dedicated dry air passages. As a result, a larger amount of dry air is generated than in the intermediate period, and the generation of white smoke is effectively prevented.

More specifically, the outside air flowing between the heat exchange plates of each set in each stage becomes a parallel flow over all the stages, flows toward the exhaust port, and is located at an intermediate portion of the heat exchange plates of each set. The air flow flowing between the heat exchange plates makes complete indirect contact with the circulating water flowing through the heat exchange coil, and the circulating water is air-cooled at each stage. Flows as dry air towards the outlet. On the other hand, among the heat exchange plates in each stage, the heat exchange plates on both sides are arranged such that the dry air flows in the dry / humid air shared passage formed between the adjacent heat exchange plates, and the heat exchange plates on the outer surfaces of the heat exchange plates on both sides. Is spray water sprayed on the heat exchange coil, and the water drops adhere to the spray water and fall. This spray water is indirectly cooled by the dry air flowing through the dry / humid air combined passage via the heat exchange plates on both sides,
With the indirect cooling of the spray water, the temperature of the dry air further rises. In this way, a dry air flow is diverted in a state of being separated by one set of heat exchange plates from each set of all stages, discharged to the exhaust port, mixed with the humid air, and rises toward the exhaust port. And
It is discharged from the exhaust port without oversaturation, and no white smoke is generated. In particular, the spray water sprayed from the upper water tank flows down in the gas-liquid contact passage due to the partition plate, so that the spray water does not flow into the adjacent dry air exclusive passage in all stages.

The operation of the invention described in claims 2, 3, 4, and 5 will be described together with the operation of the invention described in claims 7, 9, and 10. Actions of the invention according to claims 1, 2, and 5, and claim 6,
The operation is substantially the same as that described in the operation of the invention described in 9, and 10 except for the following. That is, in spring,
In summer, the water level of the spray water in the upper water tank of the cooling tower is higher than the entire periphery of each of the partial water tanks, and the spray water flows from almost the entire periphery of each of the partial water tanks into the partial water tanks at the same time. Spray water is sprayed almost uniformly in the air shared passage from the spray hole on the bottom of this partial tank to the entire area, and spray water is also sprayed into the wet air passage from the spray hole on the bottom of the other upper tank to exchange heat. The circulating cooling water circulating in the coil is indirectly cooled.

Next, in the middle of the hot and humid period, such as the rainy season in Japan, when white smoke is likely to be generated, the following operation is performed. The pumping amount of the spray water is adjusted by the pump, and when the level of the spray water in the upper water tank of the cooling tower is lower than the entire circumference of the tall partial water tank of the partial water tanks, the entire circumference of the tall partial water tank is reduced. Functions as a weir, and the flow of spray water into the tall partial water tank is completely stopped. In this way, since spray water does not flow into the tall partial water tank, spray water is not supplied from the tall partial water tank to the corresponding dry / humid air path, and the dry / humid air path is It becomes a passage only for dry air. In addition, among the partial water tanks, the spray water flows from the lower partial water tank into the corresponding passage for combined use of dry and wet air because the water level in the upper water tank is higher than these, and into these, the bottom of each part has a bottom surface. Spraying the spray water from the spray holes, the circulating cooling water flowing in the heat exchange coil and the spray water indirectly exchange heat,
In this part, the spray water is cooled by an external air flow and discharged to the exhaust side as moist air. On the other hand, in the passage for exclusive use of dry air, the circulating cooling water is indirectly air-cooled by an external air flow, and the heated air is discharged to the exhaust port as dry air, and the exhaust port is formed as a mixed flow of wet air and dry air. To a high temperature and low humidity as a whole, and from the exhaust port,
Discharges in a non-supersaturated state to prevent the generation of white smoke. At this time, the spray water flowing down in the gas-liquid contact passage due to the partition plate does not flow into the dry air exclusive passage over all stages.

In winter, the water level of the spray water in the upper tank of the cooling tower is lower than the upper edge of the short partial water tank, and the spray water flows into the water spraying section over the peripheral edge of all the partial water tanks. Is stopped, and the spraying of the spray water to all the dry / humid air passages is stopped, and the dry / humid air shared passages formed by the heat exchange plates of the respective sets are dedicated dry air passages. As a result, a large amount of dry air is generated even in the middle period, and the generation of white smoke is effectively prevented.

In the invention described in claim 8, the lower edge of the partition plate is formed with a downward nip groove into which the upper edge of the heat exchange plate can be inserted, and the heat exchange plate is inserted and connected to the nip groove. Thus, the partition wall plate effectively prevents the spray water flowing down in the gas-liquid contact passage from flowing into the dry air exclusive passage over all stages.

According to a ninth aspect of the present invention, the watertight connecting portion is formed of a connecting member made of an elastic synthetic resin having an H-shaped longitudinal section, and a lower edge of the partition plate is provided in an upward nip groove, and a downward nip groove is provided. Is formed by inserting the upper edge of the uppermost heat exchange plate, so that spray water flowing down in the gas-liquid contact passage is reliably prevented from flowing into the dedicated dry air passage at the uppermost stage. .

According to the tenth aspect of the present invention, the partition plate and the partition plate are located at the same position, and the wet air passage and the dry air shared passage are reliably separated from each other, so that the wet air passage in the middle and winter seasons is provided. Prevents spray water from entering the dry air shared passage from the passage.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 This embodiment is a modification of the first embodiment of the present invention described in claims 1, 2, 3, and 4. It is an embodiment. In FIGS. 1, 2 and 3,
A is a cross-flow type cooling tower, and its upper water tank 11 is provided with a large number of water spray holes 10 on the bottom surface. Below this upper water tank 11, a dry / humidified air passage 12 and a wet air passage 13 serve as an outside air intake. It is located adjacent to the width direction,
In winter, it has a function of stopping the spraying of spray water to the dry / humidified air passage 12 and preventing the generation of white smoke. Inside the upper water tank 11, a partition plate 14 is disposed substantially vertically at a boundary between the dry / humid air passage 12 and the wet air passage 13, and the partition plate 14 is lower than the peripheral wall of the upper water tank 11. A water sprinkling part for the dry / humid air / passage 12 is formed. Specifically, the partition plate 14 is a closed loop, and has a substantially rectangular or elliptical shape in plan view, and a partial water tank 14A which is a kind of a water spraying part for flowing spray water into the upper water tank 11 to the dry / humid air / passage 12. Is formed.
A sprinkling supply section 20 is provided in a portion of the upper water tank 11 other than the partial water tank 14A. A variable capacity pump P is connected to the sprinkling supply section 20 to flow down the passages 12 and 13 and to collect and supply the spray water collected in a lower water tank (not shown) to an area equivalent to the wet air passage. (See FIG. 3). The partial water tank 14A is formed to be elongated in the depth direction of the dry / humidified air passage 12 when viewed in a plane, and the bottom surface of the partial water tank 14A is arranged at least in one row, in the illustrated case, in one row. , Several watering holes 10a are opened at intervals (see FIG. 3).

The partial water tank 14A is composed of a pair of upright side walls 14b and both end walls and 14c connected to the side walls 14b, and the both end walls 14c in the longitudinal direction are located away from the peripheral wall 11a of the upper water tank 11. The upper part of the partial water tank 14A is open. The partial water tank 14A and the upper water tank 1
The ratio of the plane area to 1 is 1: 4, to 1: 5, and the hole diameters of all the water spray holes 10, 10a are the same. A closed heat exchange coil 15 is provided below the upper water tank 10.
Are arranged in upper and lower stages, and the supply ends of these closed heat exchange coils 15 are connected to a common supply header on the exhaust port side, and their discharge ends are connected to a common discharge header on the outside air intake side. is there.

A heat exchange fin 16 which is a kind of heat exchange plate for forming the dry / humid air / air passage 12 across the plurality of hermetically sealed heat exchange coils 15 arranged in parallel at each stage.
The heat exchange coil 15 is fixed to the hermetically sealed heat exchange coil 15 by brazing or the like at intervals in the width direction of the air intake port. The heat exchange fin 16 is made of metal such as copper and aluminum. Each set of heat exchange fins 1 stacked on top and bottom
The connecting plate 17 for vertically aligning and connecting the heat exchange fins 6 has an H-shaped vertical cross section.
Of these, the upper and lower stages (heat exchange fins 16a) are connected at the positions of the heat exchange fins 16a on both sides.
The upper and lower ends of the connecting plate 17 are opened, and the heat exchange fins 16 are opened.
nip portions 17a, 17 for storing and holding the end portions of a, 16a
b (see FIGS. 2 and 4).

The nip 17a at the upper end is more elastic than other parts. Specifically, the entire connecting plate 17 is made of synthetic resin, and the nip portion 17a at the upper end has a Shore hardness A of 7
It is made of a soft synthetic resin of about 0 and has a lower nip portion 17.
b is made of a hard synthetic resin. The synthetic resin is non-polyolefin, especially as vinyl chloride. The connecting plate 17 is a profile extruded product, and the nip 1 at the upper end is
Only 7a is made of soft vinyl chloride, and the remainder is made of hard vinyl chloride, and is integrally molded.

The upper edge 18a of the partition plate 18 is
(1) It can adhere to the outer lower surface. The partition plate 18 is entirely formed of a synthetic resin plate, and has a lower edge 18b.
Is a watertight connection 18A. The watertight connection 1
8A is formed in the same manner as the connection plate 17. That is,
The connecting member is made of an elastic synthetic resin connecting member having an H-shaped vertical cross section. The lower edge of the partition plate 18 is inserted into the upward nip groove 18B, and the upper edge of the uppermost heat exchange fin 16 is inserted into the downward nip groove 18C. It is formed freely (see FIG. 5). The upward nip groove 18B has higher elasticity than other parts. The watertight connection portion 18A has been described as a separate component from the partition plate 18. However, the watertight connection portion 18A formed with the lower edge of the partition plate 18 as a downward lip groove 18C is set forth in claim 8. (See FIG. 6). The upper edge 18a of the partition plate 18 is connected to the lower end of the partition plate 14 that partitions the inside of the upper water tank 10 by fastening means such as connecting bolts penetrating the bottom surface of the upper water tank 10.

The partition plate 18 is connected to the upper water tank 10.
In some cases, it is provided detachably. The present invention is the same even if the partition plate 18 is formed as a corrugated plate as a kind of heat exchange plate. Numerous short filling plates (not shown) are arranged in parallel between the heat exchange coils 15 above and below each stage, and wet air passages W are respectively formed between adjacent filling plates. The spray water is sprayed from the upper water tank 10 on the short filling plate.

Each of the partition plates 18 is arranged at a position corresponding to a boundary between the wet air passage 13 and the dry / wet air passage 12 with a space therebetween in the width direction of the outside air intake, and extends in the air flow direction. . That is, the dry / wet passage 12 and the wet air passage 1 provided in parallel in the width direction of the outside air intake are provided.
A plurality of partition plates 18 partitioning from the upper water tank 10 are arranged at intervals in the width direction of the outside air intake (see FIG. 2).

A sprinkling bar 19 for uniformly spreading spray water or circulating water to the dry / humid air passage 12 and the wet air passage 13
The upper water tank 10 extends horizontally across the width of the outside air intake and at a predetermined interval in the flow direction of the air flow.
There are multiple pipes along the bottom of the pipe. In each partition plate 18, a plurality of through holes through which the sprinkling bar 19 extends horizontally are formed at intervals in the flow direction of the airflow. An elastic sleeve (not shown) is provided to seal the surface watertight. The elastic sleeve is a rectangular tubular sleeve extending from one side wall of the partition plate 18 to the other side wall, and a root portion of the elastic sleeve is integrally and watertightly adhered to the partition plate 18. In this embodiment, the watering bar 19 is connected to each partition plate 18 from one direction.
In order to facilitate insertion into the through holes, the elastic sleeves extend in the same direction as the longitudinal direction of the watering bar 19. The partition plate 18 is made of stainless steel, and the elastic sleeve is made of elastic rubber or elastic synthetic resin. The elastic sleeve is provided with a beat in the width direction, and has an overall bellows shape.

Embodiment 2 In this embodiment, a typical embodiment of the invention described in claims 1, 2, 3, 4, and 5 is described. It is a form. The configuration different from the embodiment is as follows. The height of the partial water tank 14A is composed of two kinds of high and low partial water tanks 14D and 14E. The tall partial water tank 14D is used for preventing the generation of white smoke for both the intermediate and winter seasons. It is used to prevent the generation of white smoke in winter (see FIG. 7). In addition, the same reference numerals as those in the first embodiment denote the same components, and perform the same operations. The operation in each embodiment is the same as the operation of the invention described in the corresponding claim, and thus the description is omitted. The most simplified version of the above embodiment is one in which partial water tanks 14D and 14E having different heights are arranged in parallel. In small cooling towers,
This type is sufficient (see FIG. 8).

[0028]

According to the first, second, third, fourth and fifth aspects of the present invention, the water level of the upper water tank is lowered to a level lower than the upper edge of the partition plate or the partial water tank. The inflow of spray water from the water tank to the dry / humidified air passage is stopped, and a dry air dedicated passage can be easily formed. In the middle and winter seasons, the spray water enters from the wet passage to the dry / humid air shared passage. Can be prevented beforehand, and the generation of white smoke can be sufficiently prevented. In addition, neither an opening / closing valve nor a dedicated watering device is required for spraying or non-spraying on the dry / humid air passage, so that the structure is simple and maintenance is easy. In particular, in the invention according to claim 3, the partial water tank is arranged like an islet in the upper water tank, and the spray water from the sprinkling supply unit goes around the partial water tank in the middle and winter seasons. As described above, the spray water flows in the upper water tank, and the spray water can be sprayed to the wet air passage from the spray hole on the bottom surface without any trouble. In particular, in the invention according to the fourth aspect, it is possible to maintain the heat exchange ability, generate an appropriate amount of dry air, and effectively prevent the generation of white smoke. In particular, in the invention according to claim 5,
By making the height of the partition plate or the partial water tank at least two kinds of heights, it is possible to prevent the generation of white smoke in the middle period by using a tall thing, A large amount of dry air can be generated by using a tall object and a tall object, and the generation of white smoke can be effectively and easily prevented.

According to the sixth aspect of the present invention, the effects of the first and fifth aspects of the present invention can be exerted, and the heat exchange plates located on both sides of each set are watertight at the uppermost stage and correspond to the lower edges of the partition plates. At the position of the upper water tank, it can be connected to the lower surface of the upper water tank in a watertight manner, the spray water sprayed to the wet air passage can be reliably prevented from flowing into the dry / humid air shared passage, and the heat exchange plates other than both sides of each set Is supported by a straight pipe portion of the heat exchange coil,
A dry / wet air shared passage for each set can be secured. Therefore, in winter,
In the interim period, a plurality of, at least two, parallel flows of dry air at a desired flow rate can be discharged at intervals between adjacent heat exchange plates in the cooling tower exhaust port by setting the passages of each set of all stages to a dry air exclusive passage, Uniform mixing with the humid air flow makes it possible to reliably prevent the generation of white smoke.

In the seventh aspect of the present invention, the effects of the second, third, fourth and fifth aspects can be exhibited, and
The heat exchange plates located on both sides of each set can be connected to the lower surface of the upper water tank in a position corresponding to the lower edge of the partial water tank in a watertight manner at the uppermost stage, and the spray water sprayed on the wet air passage is It can be reliably prevented from flowing into the dry / wet air shared passage,

In the invention described in claim 8, the lower edge of the partition plate is formed with a downward nip groove into which the upper edge of the heat exchange plate can be inserted, and the heat exchange plate is inserted and connected to the nip groove. The partition plate does not corrode, the weight of the partition plate does not corrode, the structure is simplified, and the spray water flowing down in the gas-liquid contact passage is dried over all stages. It is possible to effectively prevent the air from flowing into the dedicated air passage.

In the ninth aspect of the present invention, the watertight connecting portion is formed of a connecting member made of an elastic synthetic resin having an H-shaped longitudinal section, and a lower edge of the partition plate is provided in an upward nip groove, and a downward nip groove is provided. Is formed by inserting the upper edge of the uppermost heat exchange plate, so that spray water flowing down in the gas-liquid contact passage can be reliably prevented from flowing into the dry air exclusive passage in the uppermost stage. .

According to the tenth aspect of the present invention, in addition to the effects of the above invention, the upper edge of the partition plate in the cross flow cooling tower is partitioned by the fixing means such as welding, bonding, or screwing with the upper water tank. Can be connected to the same position as the board.

[Brief description of the drawings]

FIG. 1 is a partially omitted side view showing a heat exchange portion of a cross-flow cooling tower according to a first embodiment.

FIG. 2 is a partially omitted front view of FIG. 1;

FIG. 3 is a partially omitted plan view showing an upper water tank part of FIG. 1;

FIG. 4 is an enlarged front view showing a connection portion between the heat exchange fins of FIG. 1;

FIG. 5 is an enlarged front view showing a connection portion between the heat exchange fin and the partition plate in FIG. 1;

FIG. 6 is an enlarged front view showing a modification of the connecting portion of FIG.

FIG. 7 is a partially omitted front view showing a heat exchange portion of a cross-flow cooling tower according to a second embodiment.

FIG. 8 is a partially omitted longitudinal sectional view of an upper water tank according to another embodiment.

FIG. 9 is a plan view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Upper water tank 12 Dry / humid air passage 13 Wet air passage 14 Partition plate 14A Partial water tank 15 Sealed heat exchange coil 16 Heat exchange fin 17 Connecting plate 18 Partition plate 19 Watering bar 20 Watering supply unit

Claims (10)

[Claims] 1. A dry / wet air passage and a wet air passage in the direction of air flow are adjacent to the width direction of the outside air intake below an upper water tank for a cross-flow cooling tower having a large number of water holes formed in a bottom surface. Both passages are equipped with a closed heat exchanger, which stops spraying of spray water to the dry / humid air shared passage in the middle and winter seasons to prevent the generation of white smoke. In the upper water tank used for a cooling tower having a function, inside the upper water tank, a partition plate is vertically disposed corresponding to a boundary between the dry / humid air passage and the wet air passage, A cross-flow cooling water supply section for lowering the peripheral wall of the upper water tank to form a sprinkling section for the dry / wet air path, and a partial dispersion water supply section connected to the wet air path equivalent area. Upper tank for tower. 2. The partition plate has a closed loop and is in the form of a plane rectangle or an oval, and a partial water tank is formed in the upper water tank to flow spray water into the dry / humid air path on the dry / humid air path. The bottom surface of the partial water tank is provided with at least one row of watering holes spaced at intervals along the longitudinal direction thereof, and the area corresponding to the wet air passage communicates with each other in the upper water tank. The upper water tank for a cross-flow cooling tower according to claim 1, wherein the upper water tank is formed by being formed. 3. The partial water tank includes a pair of upright side walls,
3. An end wall which is continuous with the end wall, wherein the end walls in the longitudinal direction are located away from the inner peripheral wall of the upper water tank, and the upper part of the partial water tank is open.
Or an upper water tank for a cross-flow cooling tower according to 3. 4. The water tank according to claim 2, wherein the ratio of the plane area of the partial water tank and the upper water tank is 1: 4 or 1 to 5, and the diameter of all the water spray holes is the same. 3. An upper water tank for a cross-flow cooling tower according to 3. 5. The height of the partition plate or the partial water tank is:
It consists of at least two kinds of high and low.
5. The cross-flow cooling tower according to claim 1, 2, 3 or 4, characterized in that it is used for preventing white smoke from being generated for both the intermediate period and winter, and the short one is for preventing white smoke from being generated in winter. Upper aquarium. 6. A closed heat exchange coil is arranged below and above the upper water tank in multiple stages, and the supply end of these closed heat exchange coils is provided on a common supply header on the exhaust port side, and the discharge end thereof is provided on the exhaust port side. A plurality of heat exchange plates, each of which is connected to a common discharge header on the outside air intake side and forms the dry / wet / air passage so as to cross the closed heat exchange coil of each stage, are provided as a set, A plurality of sets are fixed to the closed heat exchange coil at intervals in the width direction of the outside air intake, and the dry / humid air shared passage and the wet air passage are arranged adjacent to each other in the width direction of the outside air intake. A cross-flow cooling tower with a function to prevent white smoke, wherein the air flows passing through these passages are mixed in a common mixing chamber and exhausted from a common exhaust port. The upper tank described above,
The upper end of each of the outermost heat exchange plates forming the respective wet / dry air passages is watertightly connected to the bottom surface of the upper water tank at a position corresponding to the lower edge of the partition plate, and flows down the passages to the lower water tank. A cross-flow cooling tower with a white smoke prevention function, wherein a pump is provided for pumping and supplying the sprayed water collected in the area corresponding to the wet air passage. 7. A closed heat exchange coil is arranged below the upper water tank in upper and lower tiers. The supply end of these closed heat exchange coils is connected to a common supply header on the exhaust port side, and the discharge end is connected to the supply end. A plurality of heat exchange plates, each of which is connected to a common discharge header on the outside air intake side and forms the dry / wet / air passage so as to cross the closed heat exchange coil of each stage, are provided as a set, A plurality of sets are fixed to the closed heat exchange coil at intervals in the width direction of the outside air intake, and the dry / humid air shared passage and the wet air passage are arranged adjacent to each other in the width direction of the outside air intake. A cross-flow cooling tower with a function to prevent white smoke, wherein the air flows passing through these passages are mixed in a common mixing chamber and exhausted from a common exhaust port; 6. The upper water tank according to 4 or 5, wherein the passage is used for both dry and wet air. The upper end of each of the outermost heat exchange plates, which is arranged below the partial water tank in the upper water tank and is arranged separately from the wet air passage to form the dry / humid air shared passage, is formed of the partial water tank. A variable displacement pump is provided which is watertightly connected to the bottom surface of the upper water tank at a position corresponding to the lower edge, flows down the passage, and collects and supplies the spray water collected in the lower water tank to the wet air passage equivalent area. A cross-flow cooling tower with a function to prevent white smoke. 8. A watertight connection between an upper end of each of said heat exchange plates and a bottom surface of said upper water tank has a partition plate connected to a lower edge position of said partition plate. A downward nip groove into which an upper edge of the heat exchange plate can be inserted is formed, and the heat exchange plate is inserted and connected to the nip groove to form a watertight connection portion. 6 or 7 cross flow cooling tower with white smoke prevention function. 9. The watertight connecting portion is formed of a connecting member made of an elastic synthetic resin having an H-shaped longitudinal section, the lower edge of the partition plate is provided in the upward nip groove, and the uppermost heat is provided in the downward nip groove. 8. The cross-flow cooling tower according to claim 6, wherein an upper edge of the exchange plate is inserted and formed. 10. An upper edge of the partition plate is connected to a same position as a partition plate of the upper water tank by a fixing means such as welding, bonding, screwing, or the like. Cross-flow cooling tower.