JPH0250083A - Ac and/or dc type cooling tower with white smoke preventing function - Google Patents

Abstract

PURPOSE:To permit the prevention and reduction of the generation of white smoke, shining by fire, neon signs and the like and mistaken as fire in the appearance thereof in a season, in which an atmospheric temperature is low such as in winter and the like, by a method wherein a wet type heat exchanger and a dry type heat exchanger are arranged in zig zag at an atmosphere intake port provided on a cooling tower so as to fill the whole surface of the atmosphere intake port. CONSTITUTION:A fan E is provided at the air discharging port D of a cooling tower A, in which a wet type heat exchanger B made of synthetic resin and a dry type heat exchanger C made of synthetic resin are arranged in the AC and/or DC type main body thereof and wet air, passed through the wet type heat exchanger B is mixed with dry air, passed through the dry type heat exchanger C, before discharging the mixed air into atmosphere. The air intake port 10 of the wet type heat exchanger B is opposed to the air intake port 11 of the dry type heat exchanger C in the same cooling tower atmosphere intake port 12, the air passage 13 of the wet type heat exchanger B is laid in parallel to the air passage 14 of th dry type heat exchanger C while these heat exchangers B, C are arranged in several stages so that these different heat exchangers B, C are arranged alternately so as to be neighbored. According to this method, the wet air and the dry air are distributed uniformly in the whole area of an air chamber and are sucked and elevated toward the air discharging port D under the condition of distributed laminar flow.

Description

Detailed Description of the Invention A00 Title of the Invention (Field of Industrial Application) This invention is characterized in that dry heat exchangers are arranged hierarchically above the wet heat exchanger, and moist air that has passed through the wet heat exchanger is This invention relates to a cross-flow type cooling tower having a white smoke prevention function, in which a mixing chamber for mixing dry air that has passed through a dry heat exchanger and a mixing chamber is formed on the primary side of the same exhaust port.

(Prior art) This type of cooling tower is disclosed in JP-A-57-92688, JP-A-61-175480, and JP-A-55-1316.
No. 85 has already been released and is proving effective in preventing white smoke in the early stages.

(Problems to be Solved by the Invention) Among such prior art, in the cooling tower described in JP-A-57-92688, a horizontal damper surrounding a mixing chamber and a vertical damper are combined into a dry heat exchanger. The cooling tower When the blower installed at the exhaust port is activated, the dry air flows into the mixing chamber through the dry heat exchanger placed near the blower and the vertical damper, and as soon as it leaves the vertical damper, it is immediately drawn upward to the exhaust port. As a result, the amount of air that intersects with the humid air that has passed through the horizontal damper is very small, and before the dry air and humid air are sufficiently mixed in this mixing chamber, they are exhausted from the exhaust port, resulting in complete white smoke. The reality is that the prevention effect has not been achieved.

Similarly, the cooling tower described in JP-A No. 61-175480 has the same drawbacks as those described in the publication, and its white smoke prevention effect is somewhat lacking.

Next, unlike the above two prior arts, the mixing device for a cooling tower described in JP-A-55-131685 has a cross section that guides the dry air blown out from the dry heat exchanger into the mixing chamber. A V-shaped or U-shaped channel is arranged at an angle from the lower end of the dry heat exchanger to the center of the exhaust outlet, which acts as a baffle against the upward movement of moist air and This is because the air is diffused towards the exhaust port, and the action of this channel mixes humid air and dry air below the exhaust port, and as the blower power increases, this channel Since the cross section of the dry heat exchanger is V-shaped or U-shaped, most of the dry air blown out from the dry heat exchanger is immediately drawn to the exhaust side by the blower. Similarly, dry air and humid air are exhausted from the exhaust port before they are sufficiently mixed in the mixing chamber, and there is a concern that a complete white smoke prevention effect cannot be achieved. Furthermore, because there is not enough space between the bottom of the blower and the upper end of the air outlet of the dry heat exchanger, the dry air coming out of the upper end of the air outlet cannot be sufficiently sucked into the exhaust port, and the air is not exhausted. In particular, when the dry heat exchanger is made of synthetic resin, the heat exchange rate is slightly lower than that of metal fins. Therefore, dry air does not reach a high temperature so that it is desired to make the degree of mixing uniform. However, the conventional technology, which has the above-mentioned drawbacks, cannot meet this demand.

This invention does not use channels like the prior art,
The purpose of this project is to provide the market with a cross-flow cooling tower base that can prevent white smoke by devising the arrangement of a synthetic resin dry heat exchanger and a wet heat exchanger.

Configuration of the Invention (Means for Solving the Problems) In order to achieve the above-mentioned problems, the cross-flow cooling tower having a white smoke prevention function of the present invention uses a synthetic resin wet heat exchanger and a synthetic resin dry heat exchanger. A blower is installed at the exhaust port that fills the exchanger and exhausts the mixed air of moist air that has passed through the wet heat exchanger and dry air that has passed through the dry heat exchanger to the atmosphere. As a prerequisite for an AC cooling tower, the air intake of the wet heat exchanger and the air intake of the dry heat exchanger face the same cooling tower outside air intake, and the air passage of the wet heat exchanger, The air passages of the dry heat exchangers are parallel to each other, and the adjacent heat exchangers are of different models, and these heat exchangers are alternately loaded in several stages in a hierarchical manner.6. It is preferable that the heat exchangers and dry heat exchangers are arranged and packed in a staggered manner over the entire outside air intake of the cooling tower.

The lowest stage consists of only a wet heat exchanger, and the dry heat exchanger and wet heat exchanger according to claim 1 are arranged and packed in a staggered manner in at least one stage above the wet heat exchanger at the lowest stage. In some cases, it is characterized by being

The lowermost stage consists of only a wet heat exchanger, the uppermost stage consists of only a dry heat exchanger, and the structure according to claim 1 is located between the lowermost wet heat exchanger and the uppermost dry heat exchanger. It is preferable for the wet heat exchanger and the dry heat exchanger to be arranged and packed in a staggered manner in at least one stage in order to prevent white smoke.

The dry heat exchanger includes an air passage that allows air to flow in a horizontal direction;
A circulating cooling water downstream passage is formed between the air passages and allows the circulating cooling water to flow downward. is formed with a circulating cooling water supply section that is open to the outside, and a discharge section that is open to the outside is also provided on the downstream side of the liquid flow passage, and most of the width of this liquid flow passage is formed by a circulating cooling water supply section that is open to the outside. Sometimes it's Toshito Hayabe.

(effect) The operation of the specific invention having the above configuration will be explained next.

Circulating cooling water supplied from a load unit such as a refrigerator faces the same cooling tower outside air intake, and the air passages of the wet heat exchanger and the dry heat exchanger are parallel and adjacent to each other. Different types of heat exchangers are used, and the heat exchangers are distributed from the top to a dry heat exchanger and a wet heat exchanger, which are stacked and stacked in several stages.

Among this circulating cooling water, the circulating cooling water sprinkled over the dry heat exchanger is indirectly cooled by the outside air taken into the air passage of the dry heat exchanger from the outside air intake part while flowing down. Ru. On the other hand, the circulating cooling water sprinkled over the wet heat exchanger comes into direct contact with the outside air taken into the air passage of the wet heat exchanger from the outside air intake part while flowing down, and due to the latent heat of vaporization, The circulating cooling water is cooled to a predetermined temperature.

In order to achieve this cooling effect, the circulating cooling water is sequentially received by the dry heat exchangers and wet heat exchangers that are stacked in several stages, using different models of adjacent heat exchangers. After being cooled to a temperature of , it is collected by falling into the lower water tank of the cross-flow cooling tower, circulated to the load section, used, heated again, and redistributed onto the dry heat exchanger and wet heat exchanger.

On the other hand, in the wet heat exchanger, the humid air whose relative humidity has been increased by heat exchange with the circulating water flows horizontally through the air passage of the wet heat exchanger and is blown out into the air chamber by the suction action of the blower provided at the exhaust port.

In addition, dry air whose relative humidity remains unchanged and whose temperature has been increased by heat exchange with circulating water in the dry heat exchanger also flows horizontally through the air passage of the dry heat exchanger under the suction action of the blower. Blow out into the air chamber.

In this way, by using different models of adjacent heat exchangers,
A humid air flow and a dry air flow are simultaneously introduced into the air chamber from the air passage of the wet heat exchanger and the air passage of the dry heat exchanger, in which these heat exchangers are stacked in several stages and loaded alternately. The air blows out and is drawn up in a distributed laminar flow state towards the exhaust port, and the blades of the rotating blower installed at this exhaust port create a humid air flow and a dry air flow that are finely adjacent to each other in the entire area of the exhaust port. is stirred and mixed and exhausted into the atmosphere without white smoke while keeping the overall relative humidity of the air low.

When the wet heat exchanger and the dry heat exchanger are arranged and packed in a staggered manner over the entire surface of the outside air intake provided in the cooling tower, a humid air flow is generated over the entire area of the air chamber.
The dry air flow is finely and uniformly distributed, and is sucked upward toward the exhaust port in a laminar flow state.

Of the heat exchangers installed facing the outside air intakes provided on both sides of the cooling tower, the lowest stage consists only of a wet heat exchanger, and the dry heat exchanger and wet heat exchanger are the lowest stage wet heat exchanger. When the upper part of the container is arranged and filled in at least one staggered manner, the humid air flow is located in the center of the exhaust port when viewed in cross section, and the humid air flow in the center is surrounded. In this way, the airflow becomes a planar ring-shaped airflow in which moist airflow and dry airflow are finely distributed alternately.The airflow rises and reaches the exhaust port, and this humid airflow is directly discharged while the humidity is still high. There is little contact with the outside air. .

The lowermost stage consists of only a wet heat exchanger, and the uppermost stage consists of only a dry heat exchanger, and the dry heat exchanger and the dry heat exchanger according to claim 1 are the same as the wet heat exchanger of the lowermost stage. When at least one stage of the wet heat exchanger and dry heat exchanger according to claim 1 is arranged and packed in a staggered manner between the uppermost dry heat exchanger, As you can see, the dry airflow is located near the inner peripheral edge of the exhaust port, the moist airflow is located in the center, and the moist airflow and dry airflow are thinly distributed between the inner and outer airflows. Alternately distributed planar ring-shaped airflows are formed, and the moist airflow in the center rises as it is surrounded by other airflows from the surroundings, reaching the exhaust port, and this moist airflow Less direct contact with outside air.

The dry heat exchanger includes an air passage that allows air to flow in a horizontal direction;
A circulating cooling water downstream passage is formed between the air passages and allows the circulating cooling water to flow downward. is formed with a circulating cooling water supply section that is open to the outside, and a discharge section that is open to the outside is also provided on the downstream side of the liquid flow passage, and most of the width of this liquid flow passage is formed by a circulating cooling water supply section that is open to the outside. If it is characterized by being a fast part,
The circulating water supplied from the load section sequentially flows down from the supply section through the slow-flow section of the circulating cooling water flow passage, is discharged to the outside from the discharge section, and is discharged onto the wet heat exchanger below. be scattered.

(Example) Next, typical embodiments of the specific invention will be described.

First example> In FIG. 1, A is a cross-flow type cooling tower.

Synthetic resin wet heat exchanger B and synthetic resin dry heat exchanger C
is filled in the main body of the cooling tower A, and a mixture of humid air that has passed through the wet heat exchanger B and dry air that has passed through the dry heat exchanger C is exhausted to the atmosphere. A blower E is installed at the mouth. The air intake 10 of the wet heat exchanger B and the air intake 11 of the dry heat exchanger C face the same cooling tower outside air intake 12, and the air passage 13 of the wet heat exchanger B and the dry heat exchanger The air passages 14 of the exchanger C are parallel to each other, and the adjacent heat exchangers B and C are of different models, and these heat exchangers B and C are alternately loaded in several stages in a hierarchical manner6, that is, In this embodiment, the wet heat exchanger B and the dry heat exchanger C are arranged and packed in a staggered manner over the entire surface of the cooling tower outside air intake 12 (see FIGS. 1 and 2).

Second Embodiment (See Figure 3) Unlike the first embodiment, the lowest stage heat exchanger consists of only the wet heat exchanger B0, and the dry heat exchanger C and wet heat exchanger B are the lowest stage heat exchanger. wet heat exchanger B. are arranged and packed in a staggered manner in at least one stage. The rest is the same as the first embodiment.

<Third Embodiment> (See Figure 4) The lowest heat exchanger is wet heat exchanger B. The top heat exchanger consists of only a dry heat exchanger CO, and the dry heat exchanger C and wet heat exchanger B are the bottom wet heat exchanger B. At least one stage is arranged and packed in a staggered manner between the dry heat exchanger C0 and the top dry heat exchanger C0 (see Figure 14).
. The rest is the same as the first embodiment.

In each embodiment, the dry heat exchangers C and C6 include an air passage 14 through which air flows horizontally, and a circulating cooling water flow passage 1 formed between the air passage 14 and through which circulating cooling water flows downward.
5, these two passages 13 and 15 are partitioned by a partition plate 16 made of synthetic resin, and on the upstream side of the circulating cooling water flow passage 15 there is a circulating cooling water supply section 17 opened to the outside.
A discharge section 18 that opens to the outside is also provided on the downstream side of the circulating cooling water flow passage 15, and most of the width of this circulation cooling water flow passage is used as a slow flowing liquid section. Yes (see Figure 5).

The operation of each embodiment configured as described above is the same as that of the present invention.

(Effect of the invention) In the cross-flow cooling tower with a white smoke prevention function according to this specific invention, the air intake of the wet heat exchanger B and the air intake of the dry heat exchanger C are the same intake of outside air from the cooling tower. The air passages of the wet heat exchanger B and the air passages of the dry heat exchanger C are parallel to each other, and the adjacent heat exchangers are of different types, and these heat exchangers are arranged in several stages alternately. The humid air flow and the dry air flow sucked upward toward the exhaust port are mixed throughout the air chamber without using special mixing channels and mixing ducts. By using a small power blower, these adjacent humid air flows and dry air flows can be agitated and mixed at the exhaust port, and can be exhausted into the atmosphere as an air flow with low relative humidity. When using a cooling tower during periods when the atmospheric temperature is low, it is possible to prevent or reduce the occurrence of white smoke that can be mistaken for a fire due to the appearance of fires and neon signs.

In the invention (corresponding to the first embodiment) in which the wet heat exchanger B and the dry heat exchanger C are arranged and packed in a staggered manner over the entire surface of the outside air intake provided in the cooling tower, over the entire area of the air chamber, with humid air flow.

With the dry air flow uniformly distributed, the direction toward the exhaust port becomes a distributed laminar flow state, and upward suction can be achieved.

Of the heat exchangers installed facing the outside air intakes provided on both sides of the cooling tower, the lowest stage consists of only the wet heat exchanger B, and the dry heat exchanger C and the wet heat exchanger B are located at the lowest stage. In the invention (corresponding to the second embodiment) in which at least one stage is arranged and filled in a staggered manner in the upper part of the wet heat exchanger B, the moist air flow is located in the center of the exhaust port when viewed in cross section, Around this humid air stream in the center, a humid air stream and a dry air stream are flowed in a distributed laminar flow state in a finely distributed state alternately to surround the humid air stream in the center and reach the exhaust port, Without rotating the blower at high speed, the blades rotating at low speed can reliably stir the air and mix it with the dry air stream, reducing the degree to which the humid air stream in the center comes into contact with the atmosphere in a humid state. .

The lowermost stage consists of only the wet heat exchanger B, and the uppermost stage consists of only the dry heat exchanger C, and the dry heat exchanger C and the wet heat exchanger B described in claim 1 are the wet heat exchanger B of the lowermost stage. The wet heat exchanger B and the dry heat exchanger C according to claim 1 are provided between the heat exchanger B and the uppermost dry heat exchanger C.
inventions in which are arranged and packed in a staggered manner in at least one stage (
(corresponding to the third embodiment), when viewed in cross section, a dry air flow is located near the inner peripheral edge of the exhaust port, a moist air flow is located in the center, and between these inner and outer air flows. A planar ring-shaped airflow is formed in which moist airflow and dry airflow are finely distributed alternately, and the humid airflow in the center is surrounded by other airflows from the surroundings and can rise toward the exhaust port. This alone can prevent the large mass of humid air in the center from being inadvertently discharged into the atmosphere from around the exhaust port and turning into white smoke.

The dry heat exchanger C has an air passage through which air flows horizontally, and a circulating cooling water flow passage formed between the air passages and through which circulating cooling water flows downward, and these two passages are made of synthetic resin. A circulating cooling water supply part opened to the outside is formed on the upstream side of the circulating cooling water flow passage, and a discharge part opened to the outside is also formed on the downstream side of the liquid flow passage. In the invention characterized in that most of the width of this liquid flow passage is a flowing liquid slowing part, the circulating water supplied from the load part is transferred from the supply part to the circulating cooling by gravity. The water can sequentially flow through the slow-flowing part of the water flow passage, be discharged to the outside from the discharge part, and be deposited onto the wet heat exchanger B below, and both the supply port and the discharge port are open to the outside. As a result, circulating cooling water can be supplied into this dry heat exchanger C without using special power, and at the same time as the operation of this cooling tower is stopped, circulating cooling water is exposed to atmospheric pressure and is discharged from this outlet to the outside. It can be discharged and does not remain inside, thereby preventing freeze damage of this dry heat exchanger C in winter.

[Brief explanation of the drawing]

The figures relate to this invention, and Fig. 1 is a schematic diagram of the first embodiment, Fig. 2 is a side view showing the filling of the heat exchanger as seen from the outside air intake side, and Fig. 3 is the second embodiment. Figure 3 is a side view similar to Figure 2 of the second embodiment; Figure 4 is a side view similar to Figure 2 of the second embodiment;
The figure is a side view similar to FIG. 2 of the third embodiment. Main symbol A in the diagram: cross-flow cooling tower. B, B, ...Wet heat exchanger, C, C11...
...Dry heat exchanger. Procedure amendment form) December 2, 1986

Claims (1)

[Claims] 1) A synthetic resin wet heat exchanger and a synthetic resin dry heat exchanger are filled, and the humid air that has passed through the wet heat exchanger and the dry air that has passed through the dry heat exchanger are mixed. In a cross-flow cooling tower with a white smoke prevention function, in which a blower is installed at the exhaust port that exhausts air to the atmosphere, the air intake port of the wet heat exchanger and the air intake port of the dry heat exchanger are connected to the same cooling system. Facing the outside air intake of the tower, the air passages of the wet heat exchanger and the air passages of the dry heat exchanger are parallel to each other. A cross-flow cooling tower with a white smoke prevention function characterized by being loaded hierarchically across stages. 2) A direct heat exchanger with a white smoke prevention function, characterized in that the wet heat exchanger and the dry heat exchanger according to claim 1 are arranged and packed in a staggered manner over the entire surface of the cooling tower outside air intake. AC cooling tower. 3) The lowest stage consists only of wet heat exchangers, and the wet heat exchanger and the wet heat exchanger according to claim 1 are arranged in a staggered manner in at least one stage above the wet heat exchanger at the lowest stage. Claim 1 characterized in that it is filled with
A cross-flow cooling tower with a white smoke prevention function as described in Section 1. 4) The lowermost stage consists of only a wet heat exchanger, the uppermost stage consists of only a dry heat exchanger, and the scope of claim 1 is located between the lowermost wet heat exchanger and the uppermost dry heat exchanger. The cross-flow cooling tower with a white smoke prevention function according to claim 1, wherein the wet heat exchanger and the dry heat exchanger are arranged and packed in a staggered manner in at least one stage. . 5) The dry heat exchanger according to claim 1 has an air passage through which air flows in a horizontal direction, and a circulating cooling water flow passage formed between the air passages and through which circulating cooling water flows downward. , these two passages are partitioned by a partition plate made of synthetic resin, and a circulating cooling water supply section opened to the outside is formed on the upstream side of the circulating cooling water flow passage, and a circulating cooling water supply section opened to the outside is formed on the downstream side of the liquid flow passage. There is also a discharge part that opens to the outside.
A cross-flow type cooling tower having a white smoke prevention function, characterized in that most of the width of this liquid flow passage is a flowing liquid slowing section.