JPH03255889A - Ac/dc type cooling tower - Google Patents

Abstract

PURPOSE:To increase cooling capability and reduce an occupation space by arranging upper and lower stage filling material units in a particular form and extending a particular style ventilation guide plates between adjacent filling material units. CONSTITUTION:In a DC/AC type large-sized cooling tower A constituted by disposing, in a cooling tower body, filling material units B in the direction of the height of a fresh air intake port 11 of a cooling tower body in multiple stages, the upper and lower filling material units B are sequentially displaced in their positions from the fresh air intake port 11 to an exhaust vent 12 side in the direction of the depth of the same and partly overlapped also vertically. A ventillation guide plate-shaped structure 90 is extended between the adjacent filling material units B, bent from the lower end part B1 of the upper stage filling material unit B to the upper end part B2 of the lower stage filling material unit B. With the arrangement an air flow is allowed to enter over the entire height of each stage filling material unit and is assumed to satisfactorily make contact with the cooling water flowing downward from each branch pipe 61 for cooling of the same.

Description

Detailed Description of the Invention A00 Purpose of the Invention (Field of Industrial Application) This invention comprises a cooling tower body in which filler units are arranged in multiple stages above and below in the height direction of the outside air intake port of the cooling tower body. Regarding cross-flow cooling towers.

(Prior Art) This type of multi-stage cooling tower is attracting attention in recent district heating and cooling systems.

In the above-mentioned district heating and cooling systems, the installation space for cooling towers is currently limited and high cooling capacity is required. Packing methods and arrays have been developed.

Examples of such filling are described in Japanese Utility Model Publication No. 61-33424 and Japanese Patent Application Laid-open No. 56-105297.

In the former publication, the filling material is arranged in three stages throughout the lower part of the upper water tank, with the lower ones being displaced closer to the cooling tower exhaust port, and arranged along the cooling tower outside air intake, and the blower is not installed. There is almost no filler in the central chamber below the exhaust port.

By shifting the position and filling the filler in this way, the circulating cooling water can flow inward to the airflow taken in from the outside air intake.
In other words, even if the circulating cooling water is drawn to the central chamber side, the circulating cooling water is also sprayed over the entire area of the lower filling material, and the filling method and arrangement of the filling material is devised so that there are no undistributed areas in the filling material of the upper and lower stages. is being done.

Also, in the latter publication, unlike the former publication,
The three tiers of filling material are arranged in the cooling tower in the same position vertically without shifting in the depth direction, and a water sprinkler and a water tray are provided for each tier of filling material. is installed in the lower water tank of the cooling tower via a discharge pipe, and as in the former publication, the filling method for the filling material is distributed evenly to the filling material in all stages to achieve efficient cooling. , the layout has been devised.

(Problem to be Solved by the Invention) Filling with the filler as in the above two publications is suitable for increasing the cooling capacity desired for the district heating and cooling type cooling tower, but if the height of the cooling tower is It is about twice or three times as large as a single-stage type, and the width is also increased, which occupies a large amount of space, and the manufacturing and installation costs tend to increase9. Because the height and width of the cooling tower are high and wide, the moment that the cooling tower is subjected to due to wind pressure, etc. becomes large.There are also cooling towers on the market that incorporate constant vibration monitoring systems as earthquake countermeasures. The reality is that operating costs for constant stable operation are increasing.

The main purpose of this invention is to fundamentally review the common sense of the arrangement of packing materials in the prior art, adopt a new ventilation guide, and develop and provide a cross-flow type cooling tower that improves all of the above-mentioned drawbacks. .

1. Structure of the Invention (Means for Solving Problem 111) In order to achieve the above-mentioned object, the present invention provides a structure in which filler units are installed in the cooling tower main body in multiple stages vertically over the height direction of the outside air intake port of the cooling tower main body. In a cross-flow cooling tower arranged in arranged as
A cross-flow cooling tower characterized in that a curved ventilation guide plate-like body extends between the adjacent filling material units from the lower end of the upper filling material unit to the upper end of the lower filling material unit. be.

Preferably, the upstream portion of the plate-shaped body also serves as a support shelf for the upper filler unit.

The higher the filling material unit, the further outside the cooling tower body.
In some cases, a louver is attached only to the outside air intake port of the uppermost filler unit.

The filling unit includes a wet heat exchanger and a dry heat exchanger placed above the wet heat exchanger, and the humid air that has passed through the wet heat exchanger and the dry air that has passed through the dry heat exchanger. It is desirable that the exhaust port for discharging the mixed air to the atmosphere is provided with this cooling base.

The filling material unit at each stage is equipped with a cooling water distribution device that supplies the heated cooling water from the load section onto the filling material unit, and the cooling water that is cooled while flowing down the filling material unit at each stage is installed. Preferably, a water collection device is provided for individually guiding and collecting water into the lower water tank.

The cooling water distribution device includes a plurality of riser pipes set up inside the cooling tower main body, and horizontally extending from the circumferential surface of the riser pipes,
In some cases, the distal end discharge port is a distribution pipe located on the side of the cooling water supply section of the dry heat exchanger in each stage of the filling material unit.

Preferably, the water collection device includes an intermediate water tank made of the plate-shaped body, and a communication pipe that once guides the cooling water flowing down into the intermediate water tank to a lower water tank and collects it.

An upper water tank is provided above the dry heat exchanger in each filler unit, and in some cases, the dispensing end outlet of the distribution pipe is located within this upper water tank.

It is preferable for a district heating and cooling system that a plurality of cooling towers as described in claim 1 are arranged in parallel, and that these cooling tower groups are divided into at least two lines.

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

Cooling water sent from a load unit such as a refrigerator is sprayed down from the top of the filling material unit in each stage, and during this flowing down, the outside air is brought into contact with the cooling water, and the cooling water is cooled to a predetermined temperature. In this way, the cooling water that has been cooled individually in the filling material units of each stage is led to the lower water tank, collected, and then returned to the load section for circulation and use, whereupon the temperature is raised again and then sent to the filling material units of each stage. Redistribute supply.

At this time, the airflow flowing toward each of the filling material units arranged in an overlapping manner flows directly into the uppermost unit, and flows into the other units through the curved ventilation guide plate. Guided by the air flow, the air flows over the entire height of the filling material units in each stage except the top stage, and sufficiently contacts and cools the cooling water flowing down.

In the invention set forth in claim 2, the filling material units of each stage except the lowest stage are placed on the upstream side portion of the ventilation guide plate and filled into the cooling tower main body, and in this state, the Similarly, in the invention recited in claim 3, there is no louver at the outside air intake port of the filling material unit at each stage except for the filling material unit at the top stage, and the air flow is controlled by the ventilation. It is guided by a guide and flows into the filling material unit without encountering static pressure resistance.

In the invention as set forth in claim 4, the humid air whose absolute humidity has been increased by heat exchange in the lower wet heat exchanger in each stage of the filling material unit is transferred to the wet heat exchanger by the suction action of the blower provided at the exhaust port. It passes through the heat exchanger and rises toward the exhaust port.

In addition, dry air whose absolute humidity does not change due to heat exchange in the upper dry heat exchanger in each stage of filling material units,
Under the suction action of the blower, the air is blown out from the air outlet of the air passage of the dry heat exchanger, and the direction of the air rises toward the exhaust outlet. In this way, instead of creating a turbulent flow that blows out in a hierarchical manner from the filling units at each stage, the air flows in a mutually parallel laminar flow state and is diffused while being sucked upward in the direction of the blower.
The mutually finely distributed flows of dry air and humid air are mixed with each other and are exhausted to the atmosphere without becoming supersaturated air. In other words, it is exhausted outside the cooling tower without producing white smoke.

In the invention set forth in claim 5, the cooling water from the load section is distributed to the filling material units at each stage by the cooling water distribution device, and the cooling water cooled while flowing through the filling material units at each stage is After being led independently into the lower water tank and collected, it is sent to the load section and used for circulation.

In the invention set forth in claim 6, while the still warm cooling water sent from the load section ascends in the riser pipe in the cooling tower main body, it is passed through the distribution pipe to the upper dry heat exchanger in the filling material unit of each stage. The high-temperature air distributed over the container is indirectly contacted with outside air, and the outside air is heated to a desired temperature.

In the invention set forth in claim 7, the cooling water cooled to a predetermined temperature flows down into the intermediate water tank and stays therein, and then is led from the intermediate tank to the lower water tank through the communication pipe and collected in the afterload section. be returned.

In the invention set forth in claim 8, the distributed cooling water is temporarily retained in the upper water tank, and then is sprayed down over the entire area of the filler unit.

In the invention described in claim 9, the cooling water sent from the load section is divided into two lines, cooled separately, and then supplied from the lower water tank to the load section.

(Example) Representative embodiments of the invention will now be described.

First Embodiment> In Fig. 1, A is a cross-flow type large cooling tower in which filler units B are arranged in multiple stages above and below in the cooling tower main body in the height direction of the outside air intake port 11 of the cooling tower main body. be.

The filling unit B is composed of a wet heat exchanger 10 and a synthetic resin dry heat exchanger 11 arranged hierarchically above the wet heat exchanger 10.
A blower 13 is provided at an exhaust port 12 for exhausting a mixture of humid air that has passed through the heat exchanger 1 and dry air that has passed through the dry heat exchanger 11 to the atmosphere. The present invention is not limited to the structure of the filler unit B, and the present invention is the same even if it consists of only a wet heat exchanger or only a dry heat exchanger.

The filler units B in the upper and lower stages are arranged so as to be sequentially shifted in the depth direction from the outside air intake port 11 side to the exhaust port 12 side, and also partially overlap in the vertical direction. Between the adjacent filler units 8, there is a curved ventilation guide plate-like body 7 extending from the lower end B1 of the upper filler unit B to the upper end B2 of the lower filler unit B.
0 is extended.

The upstream portion of this plate-shaped body 70 serves as a support shelf for the upper packing material unit B, and the upper packing material unit B is located further outside the cooling tower main body. A looper 15 is attached only to the intake port 11 (see FIG. 1).

The multi-stage filling unit B is provided with a cooling water distribution device that supplies heated cooling water from the load section C onto the dry heat exchanger 11 of the filling unit B. A water collection device E is provided for each filler unit B at each stage to individually guide and collect the cooling water cooled while flowing down the unit B to the lower water tank F.

Furthermore, the cooling water distribution system @D includes one riser pipe 60 set up inside the main body of the cooling tower, horizontally extending from the circumferential surface of this riser pipe 60, and its tip discharge port 62 discharging the filling material of each stage. The distribution pipe 61 is located on the cooling water supply side of the dry heat exchanger 11 in unit B.

The water collecting device E includes an intermediate water tank 70a formed of the plate-like body 70 provided horizontally on the cooling water discharge side of the wet heat exchanger 11 in each stage of the filling material unit B, and an intermediate water tank 70a on the cooling water discharge side of the wet heat exchanger 11 in each stage. A communication pipe 71 guides the cooling water flowing down into the intermediate water tank 70a to the lower water tank F and collects it.

An upper water tank 14 is provided above the dry heat exchanger 11 in each stage of the filling material unit B, and a discharging port 62 at the tip of the distribution pipe 61 is located in each upper water tank 14 .

The operation of the embodiment is similar to that of the invention, and to avoid duplication, the explanation is omitted here (see Figure 2).
.

(Second Embodiment) In this embodiment, a plurality of large cooling towers A of the first embodiment, eight in the case of the figure, are arranged in parallel in a straight line for district heating and cooling. These cooling towers A are divided into two groups A1 and A2 by a partition plate 65 at the center, and one group A1 and the other group A2 are connected to different cooling water systems.

Cooling water is supplied from the load section to each group A□ and A2, and the function of the large cooling tower A of the first embodiment is performed for each cooling tower A of each group A1 and A2.

C1 Effects of the invention The effects of this invention, which is constructed and operates as described above, are as follows.

By arranging the filling material units as described above, it is compatible with the increase in cooling capacity desired for the district heating and cooling type cooling tower, and the height of the cooling tower is reduced by the overlap between the upper and lower filling material units. It can be made at a lower cost compared to conventional cooling towers, saves space occupied by cooling towers, and reduces manufacturing and installation costs.

Next, by arranging the ventilation guide plates as described above, even if there is overlap, a sufficient amount of outside air can be ensured through the packing material units in each stage of packing material units other than the outermost one, and the tower height can be increased. Since the cooling tower can be lowered, the moment to which the cooling tower is subjected due to wind pressure etc. can be further reduced, eliminating the need for a design that increases the rigidity of the cooling tower, and reducing technological investment and operating costs.

In addition to the above-mentioned effects, the invention according to claim 2 can support the upper filler unit by the ventilation guide plate, and can simplify the structure of the entire cooling tower.

In the invention as claimed in claim 3, in particular, since the louver is attached only to the outside air intake port of the filling material unit on the uppermost stage, when the outside air is taken in to the filling material units other than the uppermost stage, the air accompanying the overlap occurs. It is possible to offset the static pressure and secure the same amount of ventilation as the top filler unit.

In the invention set forth in claim 4, by configuring the filling material units in each stage as described above, dry air and moist air are layered in each stage of the filling material unit and sent to the inner chamber below the exhaust port. It blows out, and in this state it can be sucked into the exhaust port.

That is, the dry air in each stage of the packing material unit is discharged from the dry heat exchanger to the exhaust port in a laminar flow state at a desired flow rate, and the humid air coming out of the lower wet heat exchanger also rises, They are mutually distributed along with the air flow, and are sucked toward the exhaust port while being diffused and mixed. Next, the dry air and humid air discharged from the filling material units of all stages are further stirred and mixed by the blower installed at the exhaust port, so the dry air and humid air are sufficiently mixed without increasing the power of the blower. This makes it possible to achieve the desired white smoke generation prevention effect without using any mixing ducts, reduce the power consumption of the cooling tower as a whole, and reduce the overall height of the cooling tower.

Next, in the invention set forth in claim 5, since the distribution device is provided for supplying and distributing the heated cooling water from the load section to the dry heat exchanger in each stage of the filling material unit, dry air is distributed in the winter. It can be efficiently generated from the filler units in each stage, and the effect of preventing white smoke generation can be enhanced.

Furthermore, in this invention, since the water collection device is provided to guide and collect the cooling water cooled by the filling material unit at each stage to the lower water tank without passing through the lower filling material unit, the cooling water cooled by the filling material unit at each stage is provided. The cooling water can be sufficiently cooled, and
A predetermined amount of dry air can be obtained.

In the cooling tower according to claim 6, the cooling water can be distributed and supplied onto the dry heat exchanger in the filling material unit of each stage through the distribution pipe while rising in the riser pipe in the large cooling tower main body, and cooling The space in the tower body can be used effectively, and the space occupied by the large cooling tower can be reduced by eliminating all piping outside of the tower.

In the case of the cooling tower according to claim 7, the cooling water cooled to a predetermined temperature flows down to the intermediate water tank and is retained therein, and then is once guided to the lower water tank through the communication pipe for collection, and then returned to the load section. In addition, this intermediate water tank can be formed from the ventilation guide plate-like body, and the structure of the cooling tower can be simplified.

In the cooling tower according to claim 8, the distributed cooling water is temporarily retained in the upper water tank, and the cooling water is uniformly distributed over the entire area of the filling material unit while maintaining a predetermined water level. Can be sprayed.

In the cooling tower according to claim 9, since the cooling tower group in which a plurality of cooling towers are arranged in parallel is divided into at least two lines, a large capacity of circulating cooling water can be efficiently heat-exchanged for use in district heating and cooling. .

The dimension of the overlap is approximately 20 to 40% of the total height of the filler unit B, and the gap dimension Q between the filler units 8 of adjacent stages is 40 to 60% of the depth dimension of the filler unit B. The effects of the previous invention can be better exhibited if

[Brief explanation of drawings]

The figures relate to this invention; Fig. 1 is a schematic diagram of a large cooling tower according to the first embodiment, Fig. 2 is a front view of its main parts, and Fig. 3 is a schematic diagram of a large cooling tower according to the first embodiment.
The figure is a schematic plan view showing another embodiment. Main symbol B in the figure: Filler unit.

Claims (1)

[Scope of Claims] 1) In a cross-flow cooling tower in which packing material units are arranged in multiple stages above and below in the cooling tower main body in the height direction of the outside air intake port of the cooling tower main body, each filling material unit in the upper and lower stages. are sequentially shifted in the depth direction from the outside air intake side to the bottom side of the exhaust port, and are arranged so as to partially overlap in the vertical direction,
A cross-flow type cooling tower characterized in that a curved ventilation guide plate-like body extends between adjacent filling material units from the lower end of the upper filling material unit to the upper end of the lower filling material unit. 2) The cross-flow cooling tower according to claim 1, wherein the upstream portion of the plate-like body also serves as a support shelf for an upper filling unit. 3) The filling material unit in the upper stage is located further outside the cooling tower main body, and the louver is attached only to the outside air intake port of the filling material unit in the uppermost stage. Cross-flow cooling tower. 4) The filling unit consists of a wet heat exchanger and a dry heat exchanger placed above the wet heat exchanger, and the humid air that has passed through the wet heat exchanger and the dry heat exchanger are The cross-flow type cooling tower according to claim 1, characterized in that the cooling tower is provided with an exhaust port for exhausting the mixed air of dry air to the atmosphere. 5) Each stage of the filling material unit is equipped with a cooling water distribution device that supplies the heated cooling water from the load section onto the filling material unit, and also cools the filling material unit of each stage while flowing down. 2. The cross-flow cooling tower according to claim 1, further comprising a water collecting device for individually guiding and collecting the cooled water to the lower water tank. 6) The cooling water distribution device consists of one riser pipe set up inside the main body of the cooling tower, which extends horizontally from the circumferential surface of the riser pipe, and whose tip discharge port is used for dry heat exchange in the filling material units of each stage. 6. The cross-flow cooling tower according to claim 5, further comprising a distribution pipe located on the side of the cooling water supply section of the cooling tower. 7) The water collection device includes an intermediate water tank made of the plate-shaped body;
6. The cross-flow type cooling tower according to claim 5, comprising a communicating pipe that once guides and collects the cooling water flowing down into the intermediate water tank to the lower water tank. 8) An upper water tank is provided above the dry heat exchanger in each filler unit, and a discharging outlet at the tip of the distribution pipe is present in the upper water tank. cross-flow cooling tower. 9) A cross-flow type cooling tower, characterized in that a plurality of cooling towers according to claim 5 are arranged in parallel, and these cooling tower groups are divided into at least two series.