JPH109793A - Cross flow type cooling tower and coupling body therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable execution of sufficient cooling in the summer period and rather strong display of a white smoke preventing function in the winter period by a construction wherein passages for supplying circulating cooling water to vapor-liquid contact passages are divided into a plurality of systems and the vapor-liquid contact passages of each system are made switchable properly to passages used exclusively for air. SOLUTION: Several water spray pipes 42a extended horizontally from a distribution pipe 42 from a main body 40 are positioned in vapor-liquid contact passages 20a in the uppermost stage of one system of vapor-liquid contact passages 20 divided into two systems and several water spray nozzles 43a extended horizontally from a distribution pipe 43 are positioned in vapor-liquid contact passages 20b in the uppermost stage of the other system, while on-off valves 45, 46 and 47 are provided at a water spray pipe 41 and the distribution pipes 42 and 43 respectively. In the summer period, the on-off valves 46 and 47 are opened and circulating cooling water of high temperature is sprayed on all of the vapor-liquid contact passages 20. In the winter period, the on-off valves 46 and 47 are closed and supply of the circulating cooling water on all of the vapor-liquid contact passages 20 is stopped, while the circulating cooling water sent from a load part is supplied only to passages 10 used exclusively for flowing down.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cross-flow cooling tower,
In particular, the present invention relates to a multi-stage large cooling tower having a function of preventing white smoke generation and a connector for the cross-flow cooling tower.

[0002]

2. Description of the Related Art Various types of cross-flow cooling towers of this type have been developed, manufactured and sold.

[0003]

In the system for preventing the generation of white smoke in winter in the cross-flow cooling tower, the function of preventing white smoke generation is determined on the basis of winter. There is a possibility that the function will be excessive and the cooling capacity will be insufficient in the summer season, and with the increase in the size of the cooling tower, it is desired to be able to exert an appropriate function according to the four seasons in Japan. The present invention solves the above-described problems, and allows sufficient cooling in summer, exerts a weak white smoke prevention function in an intermediate period, and exerts a strong white smoke prevention function in winter. The purpose is to provide a cross-flow cooling tower to the market. The present invention solves the above-mentioned problem, and interconnects all stages of gas-liquid contact passages to prevent leakage of circulating cooling water from a joint of all stages of gas-liquid contact passages into an adjacent passage. In the interim period, the white smoke prevention function is weakened and in winter,
It is an object of the present invention to provide a cross-flow cooling tower capable of exhibiting a white smoke prevention function more strongly to the market.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a specific invention is characterized in that a plurality of flat and narrow vertical parallel circulating cooling water flows having both sides closed and open vertically. A lower passage formed adjacent to each of the circulating cooling water flow passages and having a wider gas-liquid contact than the circulating cooling water flow passage in which the circulating cooling water and the air flow directly contact each other and flow in a cross-flow manner; The gas-liquid contact passages are formed between two vertically adjacent filling plates spaced apart from each other, and the circulating cooling water flow-down passage and the gas-liquid contact passages are provided in the upper and lower stages. In a cross-flow cooling tower in which a generally rectangular parallelepiped open-air heat exchanger partitioned by plates is provided, the upper and lower ends of the peripheral wall of a connected body consisting of a hollow body opened up and down are filled. A plate receiving groove is formed,
At least one of the upper and lower gas-liquid contact passages and the circulating cooling water flow-down passage is connected to each other by this connecting body, and over the entire height of the outside air intake, all the gas-liquid contact passages communicate with each other. And a flow path for supplying circulating cooling water to the gas-liquid contact passage is divided into at least two systems, and the gas-liquid contact passage of each system can be appropriately switched to a dedicated air passage, wherein a cross-flow cooling system is provided. A tower.

In order to solve the above-mentioned problem, a plurality of pipes are provided from a main pipe for supplying circulating cooling water from a load in the cross-flow cooling tower to the downflow passage at the uppermost stage in the cross-flow cooling tower. The pipes are branched, and several water pipes extending from each water pipe are inserted into the gas-liquid contact passage at the uppermost stage of each system, and each distribution pipe is provided with an open / close valve. It is preferable in terms of its piping structure that it is a feature.

In order to solve the above-mentioned problem, a bypass pipe for adjusting a flow rate is branched from a main pipe for supplying circulating cooling water from a load portion of the cross-flow cooling tower to an upper water tank of the cross-flow cooling tower, The bypass pipe is connected to a return pipe for returning circulating cooling water from a lower water tank of the cross-flow type cooling tower to a load portion, and the upper water tank has at least two different heights and an open distribution pipe. A sprinkler pipe is piped, and a sprinkler pipe extending from one of the two different distribution pipes is a top pipe of one of the gas-liquid contact passages divided into the two systems. It is desirable from the viewpoint of the piping structure that the sprinkler pipe located in the gas-liquid contact passage and extending from the other distribution pipe is located in the uppermost gas-liquid contact passage of the other system.

In order to solve the above-mentioned problem, a flow control valve is provided in a supply pipe for supplying circulating cooling water in the cross-flow cooling tower to an upper water tank of the cross-flow cooling tower. The bottom is formed in a step shape, and a distribution pipe opening toward the flow-down passage hangs down at the bottom of the lowermost step. The bottom of at least two other steps except the lowermost step has It is preferable in terms of the structure for distributing the circulating cooling water that the cross-flow cooling tower be provided with a distribution pipe for supplying the circulating cooling water to the gas-liquid contact passage.

In order to solve the above-mentioned problem, the inside of the upper water tank of the cross-flow cooling tower in which the circulating cooling water in the cross-flow cooling tower is supplied by a supply pipe is partitioned into at least three rooms by vertical weirs. Among the three rooms, a distribution pipe opening toward the downflow passage is hung at the bottom of one of the rooms, and circulating cooling water is supplied to the gas-liquid contact passage of each system at the bottom of the other two rooms. The supply pipe is drooping,
It is preferable that the supply pipe is provided with a flow rate regulating valve in terms of a structure for distributing circulating cooling water.

In order to solve the above-mentioned problem, the dimension between the filling plate receiving grooves formed at the upper and lower ends of the connecting body of the cross-flow cooling tower is formed smaller than the width dimension of the middle part of the gas-liquid contact passage. The width dimension of the circulating cooling water flow passage between the adjacent gas-liquid contact passages is
It is characterized in that it is wide at the connection end portion of the connecting body.

[0010] In order to solve the above-mentioned problem, a passage interconnected by the continuum in the crossflow cooling tower is the gas-liquid contact passage, and the upper gas-liquid contact passage and the lower gas-liquid contact passage are connected to each other. The two side walls of the connecting member connecting the passages are connected at several places by hollow bars, and these bars are arranged at intervals in the longitudinal direction of the connecting member, and both ends of each bar are adjacent to the circulating cooling water flow. An opening is provided in the lower passage, and a filling plate receiving member is inserted into these crosspieces so that an axis thereof is inserted in a width direction of the outside air intake, and both ends thereof are attached to the cooling tower frame.

In order to solve the above-mentioned problem, a passage in the crossflow type cooling tower connected by the connecting member is the circulating cooling water flowing down passage, and the upper circulating cooling water flowing down passage and the lower circulating cooling water flowing down passage are connected to each other. Both side walls of the connecting body connecting the cooling water flow passages are connected at several places by hollow bars, and these bars are arranged at intervals in the longitudinal direction of the connecting body, and both ends of each bar are adjacent to each other. It is open to the gas-liquid contact passage, and the filling plate receiving material is inserted into these bars with its axis as the axial direction of the outside air intake, and both ends are attached to the cooling tower machine frame. I do.

[0012] In order to solve the above-mentioned problem, the connecting body in the cross-flow cooling tower is formed as a single connecting body extending over the entire width of the packing plate.

In order to solve the above-mentioned problem, the packing plates in the cross-flow type cooling tower are stacked one on top of the other so as to be located closer to the outside air inlet, and the upper end of the connecting member according to a shift in the stacking. The filling plate receiving groove portion is characterized by being formed so as to be unevenly located closer to the external intake than the filling plate receiving groove portion at the lower end thereof.

[0014] In order to solve the above-mentioned problems, a related invention is as follows.
It is used as a cooling tower according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 as a linked body for a cross-flow cooling tower.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 This embodiment is a typical embodiment of the invention described in claims 1, 2, 6, 7, and 9, and will be described together with a typical embodiment of the invention described in claim 11. I do. In FIGS. 1 and 2, A is a rectangular parallelepiped air-exchange type heat exchanger disposed in a cross-flow cooling tower B. Both sides are closed and a flat vertical direction is opened up and down. Several circulating cooling water flowing passages 10 which are parallel to each other, and a gas which is formed adjacent to the circulating cooling water flowing passage 10 and which is in direct contact with the circulating cooling water and air flow in direct contact with each other. The gas-liquid contact passages 20 are formed between two adjacent filling plates 30 spaced apart from each other, and the flow-down passages 10 and the gas-liquid contact passages 20 are filled. It is separated by a plate 30. Filling plate receiving grooves 22 and 23 are formed at the upper and lower ends of the peripheral wall of a connecting body 21 formed of a hollow body with an open top and bottom, and the upper and lower gas-liquid contact passages 20 are connected to each other by this connecting body 21. The gas-liquid contact passages 20 of all stages communicate with each other over the entire height of the outside air intake (see FIGS. 12, 14, 15, and 16). The two side walls of the connecting body 21 are connected at several places by hollow bars 24, and these bars 24 are connected to the connecting body 2.
1 are arranged at intervals in the longitudinal direction (see FIGS. 14 and 1).
5, see FIG. 16).

Both ends of each of the bars 24 are open to the adjacent circulating cooling water flow passage 10, and a filling plate receiving member 25 is inserted into these bars 24 so that the axis thereof extends in the width direction of the outside air inlet. (See FIG. 1), both ends of which are attached to the cooling tower frame. In this embodiment, the uppermost one of the gas-liquid contact passages 20 is closed so that the upper part of the pair of fillers 30 is depressed at the center and convex on both sides. Vertical ridges 31 are formed at a predetermined pitch on the upper surface of the closed filler 30 (see FIG. 13). By these ridges 31, the circulating cooling water is guided down into the downflow passage 10. When the flow-down passages 10 are formed between the filling plates 30 of the adjacent gas-liquid contact passages 20, the flow-down passages 10 in all stages communicate with each other by the connecting body 21 similarly to the gas-liquid contact passages 20. It will be in the state that was done. The dimension between the filling plate receiving grooves 22 and 23 formed at the upper and lower ends of the connecting body 21 corresponds to the width of the end formed narrower than the width of the middle part of the gas-liquid contact passage 20, The width dimension of the circulation cooling water flow passage 10 between the adjacent gas-liquid contact passages 20 and 20 is
The connecting end of the connecting body 21 is wide (see FIG. 12). Since a large number of irregularities are formed on the adjacent filling plate 30, both side edges of the flow-down passage 10 have a shape in which the outside air flow is difficult to flow, and are in a substantially sealed state. It may be sealed with a seal (not shown) such as a clip (see FIG. 7). The ratio of the flow-down passage 10 to the gas-liquid contact passage 20 is approximately 1: 1 in this embodiment, but may be 1: 2.
The flow-down passages 10 and the gas-liquid contact passages 20 are not necessarily arranged alternately, and the flow-down passages 10 may be arranged with several gas-liquid contact passages 20 (see FIG. 8). A main pipe 40 for supplying the circulating cooling water from the load section to the downflow passage 10 is provided, and a first water sprinkling pipe 41 connected to the main pipe 40 is provided on an upper surface of the heat exchanger A having a substantially rectangular parallelepiped shape. It is plumbed horizontally. The flow path for supplying the circulating cooling water to the gas-liquid contact passage 20 is divided into two systems, and the gas-liquid contact passages 20a and 20b of each system can be appropriately switched to a dedicated air passage.

That is, of the two distribution pipes 42 and 43 branched from the main body 40, several water sprinkling pipes 42a extending horizontally from the first distribution pipe 42 are used for the gas-liquid contact divided into the two systems. Several watering nozzles 43a, which are located in the uppermost gas-liquid contact passage 20a of one of the passages 20 and extend horizontally from the second distribution pipe 43, are connected to the uppermost gas-liquid contact passage of the other system. The sprinkler pipe 41 and the distribution pipes 42 and 43 are provided with on-off valves 45, 46 and 47, respectively. By operating the open / close valves 46, 47 of the first and second distribution pipes 42, 43, the gas-liquid contact passages 20a, 20b of each system can be appropriately switched to a dedicated air passage.
In this embodiment, the connecting body 21 has been described as connecting the upper and lower gas-liquid contact passages 20 to each other, but may be a connecting body for connecting the upper and lower flowing passages 10 to each other. (Corresponding to the embodiment of the invention described in claim 8). When the filling plate 30 is stacked such that the upper plate is positioned closer to the outside air inlet, the filling plate receiving groove 2 at the upper end of the connecting body 20 according to the displacement of the stacking.
2 may be formed so as to be unevenly distributed closer to the external intake than the filling plate receiving groove 23 at the lower end thereof.
Corresponding to the described embodiment of the invention).

The operation of this embodiment is as follows. a) In the summer season, the on-off valves 46 and 47 are all opened, and high-temperature circulating cooling water sent from a load portion is sprayed on all of the gas-liquid contact passages 20 to directly contact the outside air flow,
The circulating cooling water is cooled by the latent heat of vaporization and sent to the load section for circulating use. At this time, it is not necessary to close the on-off valve 45 and intentionally flow high-temperature circulating cooling water through the downflow passage 10.
By the connecting body 21, the circulating cooling water flowing through the upper gas-liquid contact passage 20 flows into the lower gas-liquid contact passage 20 without flowing down to the downstream passage 10 adjacent thereto.
Since the width of the gas-liquid contact passage 20 is narrow at the place where the connecting body 21 is installed, the circulating cooling water flowing down is collected in the connecting body 21 and the lower gas-liquid contact passage 20
Run down. At the place where the connecting body 21 is installed, the gap size between the adjacent connecting bodies 30 is sufficiently maintained, and the circulating cooling water flowing down the downflow passage 10 passes through the gap between the connecting bodies 30 and passes through the gas-liquid contact passage 20. Without flowing into the inside, smoothly flows into the downflow passage 10 at the lower stage.

B) In the middle period (spring, rainy season, autumn), supply of the circulating cooling water to the gas-liquid contact passage 20a (or 20b) of one of the two gas-liquid contact passages 20 is performed. When the corresponding on-off valve 46 (or 47) is closed, the gas-liquid contact passage 20a (or 20b) is used as a dedicated air passage, and the high-temperature circulating cooling water flowing through the downflow passage 10 flows through the dedicated air passage. The airflow is indirectly cooled by the airflow, and the outside airflow is converted into dry air. The circulating cooling water supplied to the uppermost gas-liquid contact passage 20b (or 20a) of the other system comes into direct contact with the external air flow, is cooled by the latent heat action of vaporization, and the external air flow itself rises in temperature. It becomes humid air and is guided by the ridges,
The circulating cooling water flowing down is cooled indirectly by this heated humid air, and is 50% less than the cooling capacity in summer.
It exhibits a cooling capacity of about 78%. The dry air and the humid air are mixed in a ventilation chamber 48 provided below the exhaust port 44 of the cross-flow cooling tower B, and the mixture is exhausted from the exhaust port 44 without supersaturated air, that is, without white smoke.

C) In winter, the on-off valves 46, 47
Are all closed, the supply of the circulating cooling water to all the gas-liquid contact passages 20 is stopped, and a dedicated air passage is provided.
Only supply high-temperature circulating cooling water sent from the load section, indirectly cool the circulating cooling water by the external airflow flowing through the air dedicated passage, and keep the absolute humidity constant to heat this external airflow, The air is exhausted as dry air from the exhaust port 44 without white smoke. In addition, filling plate receiving grooves 22 and 23 are formed at the upper and lower ends of a peripheral wall of a connecting body 21 formed of a hollow body with an opening at the top and bottom, and the upper and lower gas-liquid contact passages 20 are mutually connected by the connecting body 21. And the gas-liquid contact passages 20 of all stages are connected to each other over the entire height of the outside air intake, so that circulating cooling water flows into the passages that generate dry air in the intermediate and winter seasons. This is prevented beforehand, and the desired effect of preventing the generation of white smoke is exhibited. Furthermore, the amount of circulating cooling water sprayed in winter decreases compared to the amount of circulating cooling water sprayed in summer. Although the first sprinkler pipe 41 in FIG. 1 is piped along the upper part of the heat exchanger A, it may be piped in the upper end opening of the downflow passage 10 at the uppermost stage (see FIG. 9). .

Embodiment 2 This embodiment is a typical embodiment of the invention described in claims 3, 6, 7, and 9. The components having the same reference numerals as those in the first embodiment have the same configurations as those in the first embodiment.
The structure different from the following is as follows. A main pipe 4 for supplying circulating cooling water from a load portion to an upper water tank C of the cross-flow cooling tower B;
0, the bypass pipe 50 is branched.
Is connected to a return pipe 51 for returning the circulating cooling water from the lower water tank D of the cross-flow cooling tower B to the load portion, and an on-off valve 52 is provided in the bypass pipe 50. Are provided with two kinds of vertical distribution pipes 53 and 54 which stand through the bottom and have different heights. In other words, the pipes are arranged such that the open positions of the upper ends of the distribution pipes 53 and 54 are vertically different from each other (see FIG. 3). The number of distribution pipes having different heights is not limited to two, and five distribution pipes 53, 54, and 5 having different heights as shown in FIGS.
6, 57 and 58 may be provided with piping. A large number of holes 55 for supplying circulating cooling water to the downflow passage 10 are provided at the bottom of the upper water tank C, and one of the two vertical distribution pipes 53, 54 having different heights is provided. The water sprinkling pipe 53a extending horizontally from the lower end of the pipe is located in the uppermost gas-liquid contact passage 20a of one of the gas-liquid contact paths 20 divided into the two systems, and the lower end of the other distribution pipe 54. The water sprinkling pipe 54a extending horizontally from the part is located in the uppermost gas-liquid contact passage 20b of the other system. Further, the upper part of the uppermost set of the fillers 30 is closed at the center part with a depression, and the convex parts on both sides connected to the depression via an inclined surface are open. Distribution pipe 5 in part
The lower ends of 3, 54 are inserted (see FIG. 4). Vertical ridges 31 are formed on the upper surface of the filler 30 at a predetermined pitch. By these ridges 31, the circulating cooling water is guided down into the downflow passage 10.

The operation of this embodiment will be described below. a) In summer, the inflow of the circulating cooling water into the bypass pipe 50 is shut off, and all the high-temperature circulating cooling water sent from the load unit is supplied to the upper water tank C.
The circulating cooling water is distributed and supplied to the gas-liquid contact passage 20, and in the gas-liquid contact passages 20 at all stages, the external air flow and the circulating cooling water are in direct contact with each other to be cooled by the latent heat of vaporization and the flow passage 10 The circulating cooling water flowing down is cooled indirectly with the outside air flow, and all the circulating cooling water thus cooled is returned to the load section through the return pipe, and is used for circulation. In this way, the cooling capacity of the cross-flow cooling tower B is brought to 100%.

B) In the intermediate period, a part of the high-temperature circulating cooling water from the load section is passed through the bypass pipe 50 and
The supply amount of the circulating cooling water to the system is reduced as compared with the summer, the supply from the highest distribution pipe 53 to the uppermost gas-liquid contact passage 20a to one system is stopped, and the gas-liquid contact passage 20a is Dedicated passage, the uppermost gas-liquid contact passage 2 of the other system
0b and circulating cooling water to the downflow passage 10, indirectly cooling the high-temperature circulating cooling water flowing through the downflow passage 10 by the outside airflow flowing through the dedicated air passage, and keeping the outside airflow at a constant absolute humidity. The air-liquid contact passage 20b of the other system to be heated to dry air and supplied with circulating cooling water
The external airflow flowing through the cooling water directly contacts the high-temperature circulating cooling water, cools the circulating cooling water by the latent heat action of vaporization, and also raises the temperature of the circulating cooling water to become moist air. Cooling. The dry air and the humid air are mixed in the ventilation chamber of the cooling tower B, and are exhausted from the exhaust port without becoming supersaturated air, that is, without white smoke. At this time, the cooling capacity of the cooling tower B is about 50% to 70% of the cooling capacity in summer.

C) In winter, the flow rate of the circulating cooling water passing through the bypass pipe 50 is increased as compared with the intermediate period, and the level of the circulating cooling water in the upper water tank C is made lower than the upper end of the lowest distribution pipe 54 to circulate the water. Cooling water is supplied only into the downflow passage 10, all the gas-liquid contact passages 20 are switched to air-only passages, and the circulating cooling water flowing through these air-only passages 10 is indirectly cooled by an external air flow, and the absolute humidity is reduced. Is kept constant, the outside air flow is heated, the amount of dry air generated is maximized, and the air is exhausted from the exhaust port without white smoke. In the intermediate period and the winter period, the circulating cooling water is prevented from flowing into the passage for generating dry air by the connecting body 21 similarly to the first embodiment, and the intended white smoke generation preventing effect is exhibited. .
In addition, the circulating cooling water indirectly cooled by the external air flow is sent to the load section through the return pipe and used for circulation.

Embodiment 3 This embodiment is a typical embodiment of the invention described in claims 4, 6, 7 and 9. The components having the same reference numerals as those of the first embodiment have the same configuration and operation as those of the first embodiment, and the structures different from those of the first embodiment are as follows. The main pipe 40 for supplying the circulating cooling water to the upper water tank C of the cross-flow cooling tower B is provided with a flow control valve 61. The bottom of the upper water tank C is formed in a step shape, and the bottom of the lowermost step 67 is provided with a sprinkling hole 62 which is a kind of a distribution pipe opening toward the downflow passage.
The distribution pipes 65 and 66 for supplying circulating cooling water to the gas-liquid contact passages of the respective systems are provided at the bottom of at least two steps 63 and 64 other than the lowermost step 67. They are in communication (see FIG. 5).

The operation of this embodiment is as follows. a) In summer, the flow control valve 61 is opened, the water level in the upper water tank C is set to the maximum water level, and all the steps 67, 63, 6
4 is submerged, and circulating cooling water is supplied to the downflow passage and all the gas-liquid contact passages through the distribution pipes 65 and 66, thereby exhibiting 100% of the cooling capacity of the cooling tower.

B) In the middle period, the flow control valve 61
And lowering the water level of the upper water tank C, supplying circulating cooling water to the gas-liquid contact passage and the downflow passage of the one system through the water sprinkling hole 62 and the distribution pipe 65, and from the distribution pipe 66 to the other side. The supply of the circulating cooling water to the gas-liquid contact passage of the system is cut off to make it a dedicated air passage. The outside air flow flowing through the dedicated air passage and the high-temperature circulating cooling water flowing through the downflow passage are indirectly contacted with each other, and the high-temperature circulating cooling water is cooled by the outside air flow. It becomes dry air. The humid air generated from the gas-liquid contact passage of one system and the dry air are mixed in the ventilation chamber, and are exhausted without supersaturated air without white smoke.

C) In winter, the flow regulating valve 61 is further throttled to lower the water level of the upper water tank C to the lowest level, and all the circulating cooling water is supplied from the sprinkling hole 62 to only the downflow passage, and The liquid contact passage is a dedicated air passage to maximize the amount of dry air generated and prevent the generation of white smoke. In the interim and winter seasons, the circulating cooling water is prevented from flowing into the passage for generating dry air by the connecting body 21 similarly to the first embodiment, and exhibits an effect of preventing the generation of white smoke. .

Embodiment 4 This embodiment is a typical embodiment of the invention described in claims 5, 6, 7 and 9. The components having the same reference numerals as those in the first embodiment have the same configurations as those in the first embodiment, and the structures different from the first embodiment are as follows. Circulating cooling water into main pipe 4
0, the interior of the upper water tank C of the cross-flow cooling tower B is partitioned by at least three chambers 81, 82, 83 with weirs 84, 85 perpendicular to the three chambers 81, 82, 8.
3, a water sprinkling pipe 86 that opens toward the downflow passage is hung at the bottom of one room 81, and the other two rooms 8
Distributing pipes 87 and 88 for supplying circulating cooling water to the gas-liquid contact passages of the respective systems hang down at the bottoms of the pipes 2 and 83, and the supply pipe 40 is provided with a flow regulating valve 89 (FIG. 6).

The operation of this embodiment is as follows. a) In summer, the flow control valve 89 is fully opened,
The water level of the upper water tank C is set to the maximum water level, and the circulating cooling water is supplied to all the gas chambers 81 and 8 to all the gas-liquid contact passages and the downstream passages.
Supplied from 2, 83 to sufficiently cool the circulating cooling water.

B) In the interim period, the flow regulating valve 89 is throttled to reduce the amount of circulating cooling water flowing into the upper water tank C, and the three chambers 81, 82, 8 are controlled by the weirs 84, 85.
3, the supply of water to the leftmost room 83 is stopped, the circulating cooling water is not supplied to the gas-liquid contact passage of the other system, and the gas-liquid contact passage of the other system is connected to the dedicated air passage. And At this time, circulating cooling water is supplied from one of the chambers 81 and 82 to the gas-liquid contact passage of one system and the downflow passage. The outside air flow flowing through the dedicated air passage and the high-temperature circulating cooling water flowing through the downflow passage are indirectly contacted with each other, and the high-temperature circulating cooling water is cooled by the outside air flow. It becomes dry air. The humid air generated from the gas-liquid contact passage of one system and the dry air are mixed in the ventilation chamber, and are exhausted without white smoke.

C) In winter, the flow control valve 89 is further squeezed to minimize the inflow of circulating cooling water into the upper water tank C, and the three chambers 81, 82, 8
Of the three, the two rooms 82, 83 where the distribution pipes 87, 88 for the gas-liquid contact passages are suspended are vacant rooms, and circulating cooling water is not supplied to all the gas-liquid contact passages. ,
The circulating cooling water is supplied only to the downflow passage from the water sprinkling pipe 86 communicating with the remaining one room 81 to generate the maximum amount of dry air and prevent the generation of white smoke. In the interim period and the winter period, the circulating cooling water is prevented from flowing into the passage for generating dry air by the connecting body 21 similarly to the first embodiment, thereby exhibiting an intended white smoke generation preventing effect. I do.

[0033]

The effect of the first aspect of the present invention will be described.
In summer, high-temperature circulating cooling water sent from the load section is sprayed on all of the gas-liquid contact passages, brought into direct contact with the outside air flow, and cooled by the latent heat of vaporization to send the cooling water to the load section. Can be used cyclically. During the intermediate period (spring, rainy season, autumn), the supply of the circulating cooling water to the gas-liquid contact passage of one of the two gas-liquid contact passages is stopped, and the gas-liquid contact passage is moved through the gas-liquid contact passage. A dedicated passage, in which the high-temperature circulating cooling water flowing through the downflow passage is indirectly cooled by an outside airflow flowing through the dedicated air passage, and the outside airflow can be made into dry air. Circulating cooling water can be supplied to the contact passage to generate humid air. The dry air and the humid air can be mixed in a ventilation chamber provided below the exhaust port of the crossflow cooling tower, and can be exhausted to the atmosphere without supersaturated air, that is, without white smoke.

Further, the circulating cooling water supplied to the gas-liquid contact passage of the other system can be brought into direct contact with the outside air flow to be cooled by the latent heat of vaporization, and the circulating cooling water flowing through the downflow passage can be cooled by the outside air flow. It is possible to indirectly cool and exhibit a cooling capacity of about 50% to 78% as compared with the cooling capacity in summer. In winter, the supply of the circulating cooling water to all the gas-liquid contact passages is stopped, and a passage dedicated to the air is provided.The high-temperature circulating cooling water sent from the load section is supplied only to the downflow passage, and the passage dedicated to the air is provided. In addition to indirect cooling of the circulating cooling water by the external airflow flowing through the airflow, the external airflow is heated at a constant absolute humidity, and can be exhausted as dry air from the exhaust port without white smoke. Further, by interconnecting the gas-liquid contact passages of all stages by the connecting body, it is possible to prevent the circulating cooling water from leaking into the adjacent passage from the joint of the gas-liquid contact passages of all stages, and in the intermediate period, The function of preventing white smoke is weakened, and in the winter, the function of preventing white smoke is enhanced more reliably. Furthermore, the amount of circulating cooling water sprayed in winter can be reduced by the amount of circulating cooling water sprayed in summer, and water can be saved and carryover can be reduced.

According to the second aspect of the present invention, the following effects are exhibited in addition to the above effects. In summer, all of the on-off valves are opened, high-temperature circulating cooling water sent from the load section is sprayed on all of the gas-liquid contact passages, and the circulating cooling water is brought into direct contact with the outside air flow, thereby circulating the circulating cooling water by the latent heat action of vaporization. It can be cooled and sent to the load section for circulation. In the middle period (spring, rainy season, autumn), supply of the circulating cooling water to the gas-liquid contact passage of one of the two gas-liquid contact passages is stopped by closing the corresponding on-off valve. The gas-liquid contact passage may be a passage dedicated to air, and the high-temperature circulating cooling water flowing through the downflow passage may be indirectly cooled by an outside airflow flowing through the passage dedicated to air, and the outside airflow may be dry air. Further, circulating cooling water can be supplied to the gas-liquid contact passage of the other system to generate humid air.
The dry air and the humid air can be mixed in a ventilation chamber provided below the exhaust port of the crossflow cooling tower, and can be exhausted to the atmosphere without supersaturated air, that is, without white smoke.

Further, the circulating cooling water supplied to the gas-liquid contact passage of the other system can be brought into direct contact with the outside air flow to be cooled by the latent heat of vaporization, and the circulating cooling water flowing through the downflow passage can be cooled by the outside air flow. It is possible to indirectly cool and exhibit a cooling capacity of about 50% to 78% as compared with the cooling capacity in summer. In winter, the supply of the circulating cooling water to all the gas-liquid contact passages is stopped by closing all of the on-off valves, and a dedicated air passage is provided. And indirectly cools the circulating cooling water with the external airflow flowing through the air passage, heats the external airflow at a constant absolute humidity, and exhausts it as dry air without white smoke from the exhaust port. can do.

Next, the invention described in claim 3 is the invention according to claim 1.
The following effects are exhibited in addition to the effects of the described invention. In summer, all the high-temperature circulating cooling water sent from the load unit is supplied to the upper water tank, and the circulating cooling water is distributed and supplied to the downflow passage and the gas-liquid contact passage. A direct contact between the external air flow and the circulating cooling water, cooling by the latent heat of vaporization, and the circulating cooling water flowing down the downflow passage is indirectly cooled with the external air flow, returned to the load section through a return pipe, and used for circulation. To achieve 100% of the cooling capacity of the crossflow cooling tower. In the interim period, part of the high-temperature circulating cooling water from the load section is passed through the bypass pipe to reduce the amount of circulating cooling water supplied to the upper water tank compared to summer,
Stop supply from the highest distribution pipe to the gas-liquid contact passage to one system, make this passage a dedicated air passage, supply circulating cooling water to the gas-liquid contact passage of the other system and the downflow passage,
The outside airflow flowing through the dedicated air passage is dry air, the outside airflow flowing through the gas-liquid contact passage of the other system to which the circulating cooling water is supplied is wet air, and the dry air and the wet air are mixed in the ventilation chamber. It can be exhausted to the atmosphere without supersaturated air, ie, without white smoke. At this time, the cooling capacity of the cooling tower can be about 50% to 70% of the cooling capacity in summer.

In winter, the flow rate of the circulating cooling water passing through the bypass pipe is increased as compared with that in the intermediate period, the level of the circulating cooling water in the upper water tank is made lower than the upper end of the lowest distribution pipe, and the circulating cooling water flows downward. Supply only inside the passage, switch all gas-liquid contact passages to exclusive air passages, keep the outside air flowing through these exclusive air passages at a constant absolute humidity, heat with high-temperature circulating cooling water, and dry air The room can be exhausted to the atmosphere without white smoke. In addition, the circulating cooling water indirectly cooled by the external air flow can be sent to the load portion through the return pipe and used for circulation.

The invention described in claim 4 exhibits the following effects in addition to the effects of the invention described in claim 1. In summer, the flow control valve is opened, the water level in the upper water tank is set to the maximum water level, all the steps are submerged, water is sprinkled through the distribution pipe and the gas-liquid contact path through the distribution pipe, and the cooling tower is cooled. The ability can be demonstrated 100%. In the intermediate period, the flow control valve is throttled, the water level of the upper water tank is lowered, and circulating cooling water is supplied through a distribution pipe to the gas-liquid contact passage and the downflow passage of the one system, and the other system is supplied. The supply of circulating cooling water to the gas-liquid contact passage is shut off, and as the air-only passage, dry air generated from this air-only passage and wet air generated from one of the gas-liquid contact passages are mixed in the ventilation chamber. It can be exhausted without white smoke without supersaturated air. In winter, the flow regulating valve is further throttled, the water level in the upper water tank is set to the lowest level, all circulating cooling water is supplied only to the downflow passage, all gas-liquid contact passages are dedicated air passages, and dry air Maximize the amount generated,
The generation of white smoke can be prevented.

The fifth aspect of the invention exhibits the following effects in addition to the effects of the first aspect of the invention. In the summer, the water level in the upper water tank is set to the maximum water level, and circulating cooling water is supplied to all the gas-liquid contact passages and the downflow passages, whereby the circulating cooling water can be sufficiently cooled. In the interim period, the amount of circulating cooling water flowing into the upper water tank is reduced, and the weir is used to form an empty room in the other gas-liquid contact passage of the three chambers, in which circulating cooling water is not supplied. Air passage,
Generating dry air, supplying circulating cooling water to one of the gas-liquid contact passages and the downstream passage, mixing the wet air generated from one of the gas-liquid contact passages with the dry air in the ventilation chamber, and removing white smoke. It can be exhausted without accompanying. In winter, minimize the inflow of circulating cooling water into the upper water tank, do not supply circulating cooling water to all gas-liquid contact passages, and use only air passages.
By supplying the circulating cooling water only to the downflow passage, the maximum amount of dry air can be generated, and the generation of white smoke can be prevented.

The invention according to claim 6 is the first or second invention.
The following effects are obtained in addition to the effects of the inventions described in 3, 4, and 5. Since the width of the gas-liquid contact passage at the installation location of the connecting body is narrow, the circulating cooling water that flows down can flow down into the lower gas-liquid contact passage in a state gathered by the connecting body. At the installation location of the connecting body, the gap between the adjacent connecting bodies can be made sufficiently large, and the circulating cooling water flowing down the downflow passage passes through the gap between the connecting bodies into the gas-liquid contact passage. It is possible to smoothly flow into the downflow passage at the lower stage without entering.

According to the seventh aspect of the present invention, there is provided the first aspect.
In addition to the effects of the inventions described in the above, the filling plate receiving member inserted into the crosspiece of the connecting body can stably support the filling plate forming the gas-liquid contact passage provided in the upper and lower stages.

In the invention according to claim 8, claim 1 is
In addition to the effects of the inventions described in the above, the filling plate receiving member inserted into the crosspiece of the connecting body can stably support the filling plate forming the circulating cooling water flow passage installed in the upper and lower stages.

According to the ninth aspect of the present invention, there is provided the first aspect.
In addition to the effects of the inventions described in (8) to (8), the structure of the connector can be simplified.

In the tenth aspect of the present invention, in addition to the effects of the first to ninth aspects, in the case where the filling plates are positioned and stacked with respect to the outside air inlet as described above, the outside air Carryover of circulating cooling water from the inlet can be reduced.

According to the eleventh aspect, the effects of the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth aspects can be achieved by the above-described linked body. The specific effect of the first embodiment is that the gas-liquid contact passage 2
0, the top of the two sets of fillers 30 are closed in such a way that the upper part of the set of two fillers 30 is depressed at the center and convex on both sides. Since the vertical ridges 31 are formed at a predetermined pitch,
The ridges 31 allow the circulating cooling water to be uniformly distributed and guided down the entire width of the flow-down passage 10 formed between the adjacent gas-liquid contact passages 20.

The specific effects of the second embodiment are the same as those of the ridges of the first embodiment, except that
By inserting the lower end of 54 into the open convex part in the upper part of the filler 30 and piping, the water sprinkling pipes 53 and 54 can be piped to the side of the open-to-atmosphere type heat exchanger A without protruding. In addition, there is no need to secure a space for piping between the outside air inlet and the open-to-atmosphere heat exchanger A, and the floor area of the cooling tower B can be reduced accordingly.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a first embodiment.

FIG. 2 is a perspective view of a main part of FIG.

FIG. 3 is a schematic front view of a second embodiment.

FIG. 4 is a plan view showing an indirect heat exchanger part in FIG. 3;

FIG. 5 is a schematic diagram of an upper water tank according to a third embodiment.

FIG. 6 is a schematic diagram of an upper water tank according to a fourth embodiment.

FIG. 7 is a schematic plan view showing another heat exchanger part.

FIG. 8 is a schematic plan view showing another heat exchanger part.

FIG. 9 is a schematic side view showing another sprinkling pipe.

10 is a schematic front view similar to FIG. 3 but partially omitted.

FIG. 11 is a plan view showing an indirect heat exchanger part of FIG. 10;

FIG. 12 is a side view of a main part of FIG. 1 showing a use state of the connector.

FIG. 13 is a perspective view showing a ridge at an upper portion of the heat exchanger of FIG. 2;

FIG. 14 is a front view of the connector of FIG. 1;

FIG. 15 is a side view of FIG. 14;

FIG. 16 is a longitudinal cross-sectional view showing a crosspiece portion of the connecting body of FIG. 1;

FIG. 17 is a front view of another connector.

[Explanation of symbols]

 Reference Signs List A indirect heat exchanger B cross-flow cooling tower 10 circulating cooling water flow-down passage 20 gas-liquid contact passage 21 connected body

[Procedure amendment]

[Submission date] December 10, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: Cross-flow cooling tower and connector for the cross-flow cooling tower

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cross-flow cooling tower,
In particular, the present invention relates to a multi-stage large cooling tower having a function of preventing white smoke generation and a connector for the cross-flow cooling tower.

[0002]

2. Description of the Related Art Various types of cross-flow cooling towers of this type have been developed, manufactured and sold.

[0003]

In the system for preventing the generation of white smoke in winter in the cross-flow cooling tower, the function of preventing white smoke generation is determined on the basis of winter. There is a possibility that the function will be excessive and the cooling capacity will be insufficient in the summer season, and with the increase in the size of the cooling tower, it is desired to be able to exert an appropriate function according to the four seasons in Japan. The present invention solves the above-described problems, and allows sufficient cooling in summer, exerts a weak white smoke prevention function in an intermediate period, and exerts a strong white smoke prevention function in winter. The purpose is to provide a cross-flow cooling tower to the market. The present invention solves the above-mentioned problem, and interconnects all stages of gas-liquid contact passages to prevent leakage of circulating cooling water from a joint of all stages of gas-liquid contact passages into an adjacent passage. In the interim period, the white smoke prevention function is weakened and in winter,
It is an object of the present invention to provide a cross-flow cooling tower capable of exhibiting a white smoke prevention function more strongly to the market.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a specific invention is characterized in that a plurality of flat and narrow vertical parallel circulating cooling water flows having both sides closed and open vertically. A lower exclusive passage, formed adjacent to each circulating cooling water downward dedicated passage, and wider than the circulating cooling water downward exclusive passage where the circulating cooling water and the air flow are in direct contact with each other and flow in a cross-flow manner. Having gas-liquid contact passages in upper and lower stages,
Each gas-liquid contact passage is formed between two adjacent filling plates vertically arranged at an interval, and an exclusive rectangular parallelepiped shape in which the dedicated passage for flowing circulating cooling water and the gas-liquid contact passage are separated by the filling plate. The open-to-atmosphere type heat exchanger is disposed inside, and a filling plate receiving groove is formed at the upper and lower ends of the peripheral wall of the connecting body composed of a hollow body opened up and down, and circulated with the gas-liquid contact passages at the upper and lower stages. At least one of the cooling water flow-dedicated passages is interconnected by this connector, and the gas-liquid contact passages of all stages are interconnected over the entire height of the outside air intake, and the cooling water flow of all stages is The dedicated passage is also in communication with each other, and the flow path for supplying circulating cooling water to the gas-liquid contact passage is divided into at least two systems, and the gas-liquid contact passage of each system can be appropriately switched to an air dedicated passage. Characteristic cross-flow type And 却塔.

In order to solve the above-mentioned problem, a plurality of pipes are provided from a main pipe for supplying circulating cooling water from a load section in the cross-flow cooling tower to the flow-down passage at the uppermost stage in the cross-flow cooling tower. The distribution pipes are branched, and several water pipes extending from each water pipe are inserted into the top gas-liquid contact passage of each system, and each distribution pipe is provided with an open / close valve. It is preferable in terms of its piping structure.

In order to solve the above-mentioned problem, a bypass pipe for adjusting a flow rate is branched from a main pipe for supplying circulating cooling water from a load portion of the cross-flow cooling tower to an upper water tank of the cross-flow cooling tower, The bypass pipe is connected to a return pipe for returning circulating cooling water from a lower water tank of the cross-flow type cooling tower to a load portion, and the upper water tank has at least two different heights and an open distribution pipe. A sprinkler pipe is piped, and a sprinkler pipe extending from one of the two different distribution pipes is a top pipe of one of the gas-liquid contact passages divided into the two systems. It is desirable from the viewpoint of the piping structure that the sprinkler pipe located in the gas-liquid contact passage and extending from the other distribution pipe is located in the uppermost gas-liquid contact passage of the other system.

In order to solve the above-mentioned problem, a flow control valve is provided in a supply pipe for supplying circulating cooling water in the cross-flow cooling tower to an upper water tank of the cross-flow cooling tower. The bottom is formed in a stepped shape, and a distribution pipe that opens toward the flow-down dedicated passage hangs at the bottom of the lowermost step, and the bottom of at least two other steps except the lowermost step has A cross-flow type cooling tower characterized in that a distribution pipe for supplying circulating cooling water to the gas-liquid contact passage of the system is preferably provided in terms of a structure for distributing circulating cooling water.

In order to solve the above-mentioned problem, the inside of the upper water tank of the cross-flow cooling tower in which the circulating cooling water in the cross-flow cooling tower is supplied by a supply pipe is partitioned into at least three rooms by vertical weirs. Among the three rooms, a distribution pipe opening toward the flow-down passage is hung down at the bottom of one of the rooms, and the circulating cooling water flows through the gas-liquid contact passage of each system at the bottom of the other two rooms. It is preferable in terms of the structure for distributing the circulating cooling water that a distribution pipe for supplying the cooling water is drooped, and the supply pipe is provided with a flow control valve.

In order to solve the above-mentioned problem, the dimension between the filling plate receiving grooves formed at the upper and lower ends of the connecting body of the cross-flow cooling tower is formed smaller than the width dimension of the middle part of the gas-liquid contact passage. The width of the dedicated passage for circulating cooling water flowing between adjacent gas-liquid contact passages is wide at the connection end of the connecting body.

[0010] In order to solve the above-mentioned problem, a passage interconnected by the continuum in the crossflow cooling tower is the gas-liquid contact passage, and the upper gas-liquid contact passage and the lower gas-liquid contact passage are connected to each other. The two side walls of the connecting member connecting the passages are connected at several places by hollow bars, and these bars are arranged at intervals in the longitudinal direction of the connecting member, and both ends of each bar are adjacent to the circulating cooling water flow. It is open to the lower exclusive passage, and the filling plate receiving material is inserted into these bars with its axis as the width direction of the outside air intake, and both ends are attached to the cooling tower machine frame. .

In order to solve the above-mentioned problem, a passage connected to the cross flow cooling tower in the cross-flow cooling tower is a dedicated passage for flowing down the circulating cooling water. The two side walls of the connecting body connecting the circulation cooling water flow-dedicated passage are connected at several places by hollow bars, and these bars are arranged at intervals in the longitudinal direction of the connecting body. Opening to adjacent gas-liquid contact passages, filling plate receiving material inserted into these bars with its axis as the axial direction of the outside air intake, and both ends attached to the cooling tower machine frame It is characterized by.

[0012] In order to solve the above-mentioned problem, the connecting body in the cross-flow cooling tower is formed as a single connecting body extending over the entire width of the packing plate.

In order to solve the above-mentioned problem, the packing plates in the cross-flow type cooling tower are stacked one on top of the other so as to be located closer to the outside air inlet, and the upper end of the connecting member according to a shift in the stacking. The filling plate receiving groove portion is characterized by being formed so as to be unevenly located closer to the external intake than the filling plate receiving groove portion at the lower end thereof.

[0014] In order to solve the above-mentioned problems, a related invention is as follows.
It is used as a cooling tower according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 as a linked body for a cross-flow cooling tower.

[0015]

Embodiment 1 This embodiment is a typical embodiment of the invention described in claims 1, 2, 6, 7, and 9, and is a representative embodiment of the invention described in claim 11. A description will be given in conjunction with the embodiments. In FIGS. 1 and 2, A is a rectangular parallelepiped air-exchange type heat exchanger disposed in a cross-flow cooling tower B. Both sides are closed and a flat vertical direction is opened up and down. Several circulating cooling water downflow passages 10 which are parallel to each other, and are formed adjacent to the circulating cooling water downflow passages 10, and the circulating cooling water and the air flow are in direct contact with each other to form a cross flow. The gas-liquid contact passages 20 have a plurality of upper and lower stages, and each of the gas-liquid contact passages 20 has two adjacent filling plates 3 arranged at intervals.
The passage 10 is separated from the gas-liquid contact passage 20 by a filling plate 30. At the upper and lower ends of the peripheral wall of the connecting body 21 formed of a hollow body with an open top and bottom,
Filling plate receiving grooves 22 and 23 are formed, and the upper and lower gas-liquid contact passages 20 are connected to each other by this connecting body 21 so that the gas-liquid contact passages 20 of all stages are connected to each other over the entire height of the outside air intake. (FIG. 12, FIG. 14, FIG. 15,
See FIG. 16). The two side walls of the connecting body 21 are connected at several places by hollow bars 24, which are arranged at intervals in the longitudinal direction of the connecting body 21 (FIG. 1).
4, see FIGS. 15 and 16).

Both ends of each of the bars 24 are open to adjacent exclusive passages 10 for circulating cooling water flow, and a filling plate receiving member 25 is inserted into these bars 24 with its axis inserted in the width direction of the outside air inlet. Yes (see FIG. 1), both ends of which are attached to the cooling tower frame. In this embodiment, the uppermost one of the gas-liquid contact passages 20 is a pair of fillers 3.
The upper part of 0 is depressed at the center and is closed as a convex shape on both sides. Vertical ridges 31 are formed at a predetermined pitch on the upper surface of the closed filler 30 (see FIG. 13). By these ridges 31, the circulating cooling water is guided down into the downflow passage 10. Between the filling plates 30 of the adjacent gas-liquid contact passages 20,
When the flow-down passage 10 is formed, all the flow-down passages 10 are connected to each other by the connecting body 21 similarly to the gas-liquid contact passage 20. Filling plate receiving grooves 2 formed at the upper and lower ends of the connecting body 21
The dimension between 2 and 23 corresponds to the width of the end formed narrower than the width of the middle part of the gas-liquid contact passage 20, and the flow of the circulating cooling water between the adjacent gas-liquid contact passages 20 and 20. The width of the dedicated passage 10 is wide at the connection end of the connecting body 21 (see FIG. 12). Since a large number of irregularities are formed in the adjacent filling plate 30, both side edges of the flow-down dedicated passage 10 have a shape in which the outside air flow is difficult to flow, and are in a substantially sealed state. May be sealed with a sealing device (not shown) such as a clip (see FIG. 7). In this embodiment, the ratio between the flow-down exclusive passage 10 and the gas-liquid contact passage 20 is approximately 1: 1, but may be 1: 2, and the flow-down exclusive passage 10 and the gas-liquid contact passage 20 are not necessarily alternated. The flow-down dedicated passage 10 may be arranged with several gas-liquid contact passages 20 (see FIG. 8). Main pipe 4 for supplying circulating cooling water from a load section to the downflow passage 10
0 is provided, and a first water sprinkling pipe 41 connected to the main pipe 40 is horizontally piped on the upper surface of the heat exchanger A in the shape of a rectangular parallelepiped. The flow path for supplying the circulating cooling water to the gas-liquid contact passage 20 is divided into two systems, and the gas-liquid contact passages 20a and 20b of each system can be appropriately switched to a dedicated air passage.

That is, of the two distribution pipes 42 and 43 branched from the main body 40, several water sprinkling pipes 42a extending horizontally from the first distribution pipe 42 are used for the gas-liquid contact divided into the two systems. Several watering nozzles 43a, which are located in the uppermost gas-liquid contact passage 20a of one of the passages 20 and extend horizontally from the second distribution pipe 43, are connected to the uppermost gas-liquid contact passage of the other system. The sprinkler pipe 41 and the distribution pipes 42 and 43 are provided with on-off valves 45, 46 and 47, respectively. By operating the open / close valves 46, 47 of the first and second distribution pipes 42, 43, the gas-liquid contact passages 20a, 20b of each system can be appropriately switched to a dedicated air passage.
In this embodiment, the connecting body 21 has been described as connecting the upper and lower gas-liquid contact passages 20 to each other. However, depending on the arrangement of the gas-liquid contact passages 20a and 20b, the upper and lower gas passages 20a and 20b may be connected. There may be a case where the flow-down dedicated passages 10 are connected to each other (corresponding to the embodiment of the invention described in claim 8). When the filling plate 30 is stacked so as to be positioned closer to the outside air intake as the upper stage, the filling plate receiving groove portion 22 at the upper end of the connecting body 20 is moved to the lower end according to the displacement of the stacking. There may be a case where it is formed so as to be unevenly distributed toward the external inlet from the filling plate receiving groove 23 (corresponding to the embodiment of the invention described in claim 10).

The operation of this embodiment is as follows. a) In summer, the on-off valves 46 and 47 are all opened, and high-temperature circulating cooling water sent from the load is sprayed on all of the gas-liquid contact passages 20 so as to be brought into direct contact with an external air flow, thereby causing latent heat of vaporization. Circulates the cooling water and sends it to the load for circulation. At this time, it is not necessary to close the on-off valve 45 and intentionally flow high-temperature circulating cooling water through the downflow passage 10. The connecting body 21
Accordingly, the circulating cooling water flowing through the upper gas-liquid contact passage 20 flows into the lower gas-liquid contact passage 20 without flowing into the downstream exclusive passage 10 adjacent thereto. Since the width of the gas-liquid contact passage 20 is narrow at the place where the connecting body 21 is installed, the circulating cooling water flowing down flows down into the lower gas-liquid contact passage 20 in a state of being gathered in the connecting body 21. . At the place where the connecting body 21 is installed, the size of the gap between the adjacent connecting bodies 30 is sufficiently maintained, and the circulating cooling water flowing down the flow-down dedicated passage 10 passes through the gap between the connecting bodies 30 and passes through the gas-liquid contact passage. 20, and smoothly flows into the downflow-dedicated passage 10 at the lower stage without invading the inside 20. During the downflow, the circulating cooling water flowing in the downflow passage 10 indirectly by the outside air is also cooled.

B) In the middle period (spring, rainy season, autumn), supply of the circulating cooling water to the gas-liquid contact passage 20a (or 20b) of one of the two gas-liquid contact passages 20 is performed. When the corresponding on-off valve 46 (or 47) is closed, the gas-liquid contact passage 20a (or 20b) is used as an air exclusive passage, and the high-temperature circulating cooling water flowing through the downflow exclusive passage 10 flows through the air exclusive passage. The air is cooled indirectly by the external air and the external air is dried. The circulating cooling water supplied to the uppermost gas-liquid contact passage 20b (or 20a) of the other system comes into direct contact with the external air flow, is cooled by the latent heat action of vaporization, and the external air flow itself rises in temperature. The circulating cooling water which becomes humid air and is guided by the ridges and flows down the downflow passage 10 is indirectly cooled by the heated humid air, and has a cooling capacity of about 50% to 78% as compared with the cooling capacity in summer. Demonstrate. The dry air and the humid air are mixed in a ventilation chamber 48 provided below the exhaust port 44 of the cross-flow cooling tower B, and the mixture is exhausted from the exhaust port 44 without supersaturated air, that is, without white smoke.

C) In winter, the on-off valves 46 and 47 are all closed to stop the supply of the circulating cooling water to all the gas-liquid contact passages 20 to make them exclusive air passages and load only the downflow exclusive passages 10. Supply the high-temperature circulating cooling water sent from the unit, indirectly cool the circulating cooling water with the external air flow flowing through the dedicated air passage, keep the absolute humidity constant, and heat this external air flow to dry air ,
The air is exhausted from the exhaust port 44 without white smoke. In addition, filling plate receiving grooves 22 and 23 are formed at the upper and lower ends of the peripheral wall of the connecting body 21 formed of a hollow body with an open top and bottom,
The upper and lower gas-liquid contact passages 20 are connected to each other by this connecting body 21, and all the gas-liquid contact passages 20 communicate with each other over the entire height of the outside air intake. In this case, the circulating cooling water is prevented from flowing into the passage for generating dry air, and the desired effect of preventing the generation of white smoke is exhibited. Furthermore, the amount of circulating cooling water sprayed in winter decreases compared to the amount of circulating cooling water sprayed in summer. Although the first sprinkler pipe 41 in FIG. 1 is piped along the upper part of the heat exchanger A, the first sprinkler pipe 41 may be piped in the upper end opening of the flow-down dedicated passage 10 at the uppermost stage (FIG. 9).
reference).

Claims (11)

[Claims] 1. A plurality of flat, narrow, vertically extending circulating cooling water flow passages which are closed at both side edges and which are open up and down and adjacent to each of the circulating cooling water flow passages. The circulating cooling water and the air flow are in direct contact with each other and have a gas-liquid contact passage that is wider than the circulating cooling water flow passage that flows in a cross-flow manner, and each gas-liquid contact passage is An air-filled heat-dissipating heat in the form of a rectangular parallelepiped in which two adjacent filling plates vertically arranged at intervals are formed therebetween, and the circulation cooling water flow passage and the gas-liquid contact passage are separated by the filling plates. In the cross-flow cooling tower in which the exchanger is disposed, a filling plate receiving groove is formed at the upper and lower ends of a peripheral wall of a connecting body formed of a hollow body opened up and down,
At least one of the upper and lower gas-liquid contact passages and the circulating cooling water flow-down passage is connected to each other by the connecting body, and the gas-liquid contact passages of all the stages are interconnected over the entire height of the outside air intake. The circulating cooling water flow passages of all stages are also in communication with each other, and the flow path for supplying the circulating cooling water to the gas-liquid contact passage is divided into at least two systems, and the gas-liquid contact passage of each system is appropriately dedicated to air. A cross-flow cooling tower characterized by being switchable to a passage. 2. A plurality of distribution pipes are branched from a main pipe for supplying circulating cooling water from a load section to the downflow passage at the uppermost stage. 2. The cross-flow cooling tower according to claim 1, wherein the water cooling pipe is inserted into the gas-liquid contact passage at the uppermost stage of the system, and each of the water spray pipes is provided with an on-off valve. 3. A bypass pipe for adjusting a flow rate is branched from a main pipe for supplying circulating cooling water from a load section to an upper water tank of the cross-flow cooling tower, and the bypass pipe is connected to a lower portion of the cross-flow cooling tower. The upper water tank is connected to a return pipe for returning circulating cooling water from the water tank to the load portion, and the upper water tank is provided with at least two kinds of distribution pipes opened at different positions. Of the different distribution pipes, the water sprinkler pipe extending from one distribution pipe is located in the uppermost gas-liquid contact passage of one of the gas-liquid contact passages divided into the two systems, and the other distribution pipe The cross-flow cooling tower according to claim 1, wherein the sprinkler pipe extending from the other system is located in the uppermost gas-liquid contact passage of the other system. 4. A flow control valve is provided in a supply pipe for supplying circulating cooling water to an upper water tank of the cross-flow cooling tower, and the bottom of the upper water tank is formed in a stepped shape, and the bottom of the lower water tank is provided at the bottom. The distribution pipe that opens toward the downflow passage is suspended, and the bottom of at least two other steps except the bottom is supplied with circulating cooling water to the gas-liquid contact passage of each system. 2. The cross-flow cooling tower according to claim 1, wherein said distribution pipes communicate with each other. 5. The interior of an upper water tank of a cross-flow cooling tower supplied with circulating cooling water by a supply pipe is partitioned by a weir perpendicular to at least three rooms, and is provided at a bottom of one of the three rooms. A sprinkling pipe that opens toward the downflow passage is suspended, and a distribution pipe that supplies circulating cooling water to the gas-liquid contact passage of each system is suspended at the bottom of the other two chambers. The cross-flow cooling tower according to claim 1, wherein a flow control valve is provided in the cooling tower. 6. The dimension between the filling plate receiving grooves formed at the upper and lower ends of the coupling body is smaller than the width of the end of the gas-liquid contact passage formed smaller than the width of the middle part of the gas-liquid contact passage. The width dimension of the circulating cooling water flowing-down passage between adjacent gas-liquid contact passages is wide at the connection end of the connecting body.
The cross-flow cooling tower according to 3, 4 or 5. 7. A passage interconnected by said continuous body is said gas-liquid contact passage, and both side walls of said connecting body connecting said upper gas-liquid contact passage and lower gas-liquid contact passage are provided at several places. The bars are connected at intervals in the longitudinal direction of the connecting body, and both ends of each bar are opened to the adjacent circulating cooling water flow passage, and the bars are filled. The plate receiving member is inserted with its axis as the width direction of the outside air intake, and both ends thereof are attached to the cooling tower machine frame.
The cross-flow cooling tower according to 3, 4, 5 or 6. 8. A passage interconnected by said connecting member is said circulating cooling water flowing passage, and both side walls of said connecting member connecting said upper circulating cooling water flowing passage and a lower circulating cooling water flowing passage. Are connected at several places by hollow bars, these bars are arranged at intervals in the longitudinal direction of the connecting body, and both ends of each bar are open to adjacent gas-liquid contact passages. The filling plate receiving material is inserted with its axis as the axial direction of the outside air intake, and both ends thereof are attached to the cooling tower machine frame.
7. A cross-flow cooling tower according to 5 or 6. 9. The connection according to claim 1, wherein said connection is formed as a single connection extending over the entire width of the filling plate. 7. A cross-flow cooling tower according to 7 or 8. 10. A filling plate receiving groove at an upper end of the connecting body, wherein a filling plate receiving groove at an upper end of the connecting body is formed in accordance with a displacement of the stacking so that the filling plate is positioned closer to the outside air inlet as an upper stage. The cross-flow cooling tower according to claim 1, 2, 3, 4, 5, 6, 7, 8, or 9, wherein the cooling tower is formed so as to be unevenly distributed toward the external intake from the groove. 11. The method of claim 1, 2, 3, 4, 5, 6, 7,
11. A linked body for a cross-flow cooling tower, which is used for the cooling tower according to 8, 9, or 10.