JPH10311690A - Cooling tower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a small and easy-to-handle cooling tower having high cooling capacity per unit area by arranging cross fittings on the opposite sides in the tower body of a cooling tower, making an air suction port oppositely to the outer side face thereof and arranging a counter filling in the lower space of a fan. SOLUTION: Cross flow heat-exchanging sections A, i.e., cross fillings 3, are arranged on the opposite sides in the tower body 1 of a cooling tower, an air suction port 2 is made oppositely to the outer side face thereof and a counter flow heat-exchanging sections B, i.e., cross filling 3, is arranged in the lower space of a fan 16 between two cross flow heat-exchanging sections A. The cross filling 3 is supported by a cross filling receiver 6 and an upper water tank 4 for spraying water to the cross filling 3 is disposed above the cross filling 3. A lower water tank 5 for receiving cooling water flowing down the cross filling 3 and being cooled through contact with the air flowing from an air suction port 2 into the tower body 1 through action of the fan 16 is disposed below the cross filling 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling tower, and more particularly to a cooling tower suitable for use in a cooling tower for an absorption refrigerator requiring a large cooling capacity.

[0002]

2. Description of the Related Art Conventionally, cooling towers have been widely used in air conditioning equipment, industrial production equipment, etc. for cooling water.
Along with the CFC regulations aimed at protecting the global environment, instead of the centrifugal chillers used in these facilities,
Absorption refrigerators have come to be used frequently.

[0003]

By the way, the absorption chiller has the same refrigeration capacity as the centrifugal chiller.
The outlet water temperature (the inlet water temperature of the cooling tower) is high, the water temperature difference is large, and the amount of water is large. For this reason, the cooling tower used in the absorption refrigerator requires 1.5 times or more the cooling capacity for the same refrigeration capacity as compared with that of the centrifugal chiller. And a large installation area is required. In particular, when an absorption type refrigerator is used instead of the existing centrifugal chiller, there may be a problem in securing the installation place of the cooling tower and withstand load of the foundation.

Conventional cooling towers can be roughly classified into two types: countercurrent type and crossflow type. Counterflow type cooling towers have a capacity of treated water per unit area of less than half that of the crossflow type. However, the cross-flow type cooling tower has
There is a problem that the space below the blower is large and it is difficult to reduce the size of the cooling tower. Further, when the air volume is increased in order to improve the cooling capacity, the electric motor capacity of the blower increases, and there is a problem that the manufacturing cost and the maintenance cost of the cooling tower increase. Furthermore, in recent years, cooling towers are frequently operated and used throughout the year, and the frequency of checking the clogging of the strainer of the water collecting tank, the operation state of the ball tap, etc. has increased, but as the cooling tower becomes larger, However, when inspecting the inside of the water collecting tank provided substantially at the center of the lower water tank, the operator must enter the cooling tower to perform the work, and there is a problem that the working efficiency is reduced.

The present invention has been made in view of the above problems of the conventional cooling tower, and has as its object to provide a small, easy-to-handle cooling tower having a large cooling capacity per unit area including the amount of treated water.

[0006]

In order to achieve the above object, a cooling tower according to the present invention is provided with cross-filling as a cross-flow heat exchange section on both sides of the inside of the tower of the cooling tower, and the outer surface thereof is provided. And a counter-filling as a countercurrent heat exchange unit in the space below the blower.

This cooling tower is provided with a cross-filling as a cross-flow heat exchange section having a large amount of treated water per unit area, and further, a counter as a countercurrent heat exchange section utilizing a space below the blower. By arranging the filling, the cooling capacity per unit area including the treated water volume is large, and the tower can be downsized.Therefore, there is no restriction in terms of securing the installation place and the load capacity of the foundation. In addition, when an absorption type refrigerator is used instead of the existing centrifugal refrigerator, it can be used without any trouble.

[0008] In this case, the cross-filling of the cross-flow type heat exchange section is formed into a trapezoidal cross-section in which the cross-filling becomes thicker as it goes down by forming the outer surface of the cross-filling surface as a vertical surface and the inner surface as an inclined surface. be able to.

Thus, the heat exchange of the cooling water flowing toward the inside of the cross-filling can be efficiently performed under the influence of the air flow flowing from the air suction port, the air resistance can be reduced, and the blower can be cooled. Water splashing from the water can be reduced.

In addition, the thickness of the counter-filling of the counter-current heat exchanger can be made smaller than the thickness of the cross-filling of the cross-flow heat exchanger.

[0011] Thus, the air resistance of the counter-filling of the counter-flow heat exchange section can be reduced, and the cooling capacity of the counter-filling can be sufficiently exhibited.

Further, a water sprinkling device can be provided above the counter-filling of the counter-flow heat exchange section, and a cross-filling as a second cross-flow heat exchange section can be provided below.

[0013] Thus, the cooling water flowing down the counter-filling of the counter-current heat exchange section flows down the cross-filling of the second crossflow heat exchange section further below, so that the cooling water flows down.
The cooling capacity per unit area including the amount of treated water can be further improved.

Further, the lower end position of the cross-filling of the cross-flow heat exchange section can be set to be lower than the lower end position of the cross-filling of the second cross-flow heat exchange section.

[0015] Thereby, the amount of air passing through the cross-filling of the second cross-flow heat exchange section can be secured,
The cooling capacity of the cross-filling can be sufficiently exhibited.

Further, a water collecting tank can be formed at a position below one cross-filling of the cross-flow heat exchange part of the lower water tank.

[0017] Accordingly, the inspection work such as clogging of the strainer of the water collecting tank and the operation state of the ball tap can be easily performed from outside without the worker entering the cooling tower, thereby improving work efficiency. Can be.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the cooling tower of the present invention will be described below with reference to the drawings.

FIG. 1 shows a cooling tower according to a first embodiment of the present invention. In this cooling tower, cross-fillings 3 and 3 as cross-flow heat exchangers A and A are disposed on both sides in a tower body 1, and an air suction port 2 is formed in the tower body 1 facing the outer surface thereof. In addition, a counter-filling 8 as a countercurrent heat exchanger B is arranged in a space below the blower 16 sandwiched between the two cross-flow heat exchangers A.

Cross-filling 3 of cross-flow heat exchange section A
Is supported by a cross-filling receiver 6, above which an upper water tank 4 for watering the cross-filling 3.
And a lower water tank that flows down the cross-filling 3 below and receives cooling water cooled by contact with air flowing into the tower 1 through the air suction port 2 by the action of the blower 16. 5 is disposed so as to cover the entire tower 1.

The counter-filling 8 of the countercurrent heat exchanger B is supported by a counter-filling receiver 7,
Above it, a rotary or fixed watering device 9 for watering the counter filling 8 is provided.

A lower water tank 5 which flows down the cross-filling 3 and the counter-filling 8 and receives the cooled cooling water.
, The cross-filling 3 of one of the cross-flow heat exchange units A
A water collecting tank 10 is provided at a position below the water collecting tank 10, and the cooling water received in the lower water tank 5 is returned to the load side through the water collecting tank 10. In this water collecting tank 10, a strainer 11, a ball tap 12, and a cooling water outlet pipe 13 are provided. Accordingly, the inspection work such as the clogging of the strainer 11 of the water collecting tank 10 and the operation state of the ball tap 12 can be easily performed from the outside without the worker entering the tower 1, thereby improving the working efficiency. be able to.

On the other hand, a cooling water inlet pipe 14 for supplying cooling water sent from the load side to the upper water tank 4 is provided in the tower 1.
And a cooling water inlet pipe 15 for supplying water to the water sprinkling device 9.

A blower 16 is installed above the water sprinkling device 9 of the counter-filling 8 of the countercurrent heat exchange section B on the top of the tower 1, and is driven by a motor 17.

As a result, the cooling water sent from the load side to the cooling tower with heat energy is branched into two cooling water inlet pipes 14 and 15, and the cooling water of one of the cooling water inlet pipes 14 is cross-flow type. The water is introduced into the upper water tank 4 of the heat exchange part A, and is almost uniformly sprayed to the cross filling 3 thereunder through a number of water holes formed in the bottom surface of the upper water tank 4 to flow down the cross filling 3. At this time, the cooling water flowing down the cross-filling 3 intersects at right angles in the cross-filling 3 with the air flowing into the tower 1 through the air suction port 2 by the action of the blower 16 and heat exchange by direct contact After being cooled, it is received by the lower water tank 5.

The cooling water of the other cooling water inlet pipe 15 is guided to the water sprinkling device 9 of the countercurrent heat exchange section B, and is passed through a water sprinkling hole of a rotary or fixed water sprinkling pipe to a counter thereunder. Water is almost uniformly sprinkled on the filling 8 and flows down the counter filling 8. At this time, the cooling water flowing down the counter filling 8 is opposed to the air flowing into the tower 1 through the air inlet 2 by the action of the blower 16 in the counter filling 8, and heat exchange by direct contact is performed. After being cooled, it is received by the lower water tank 5. Then, the cooling water that has passed through the cross-flow heat exchange unit A and the countercurrent heat exchange unit B is collected in the common lower water tank 5, and then returned to the load through the water collection tank 10 by the cooling water outlet pipe 13. .

As described above, by arranging the counter-filling 8 of the countercurrent heat exchange unit B by utilizing the space below the blower 16 and performing heat exchange, the unit space per unit area including the amount of treated water can be obtained. Since the cooling capacity is large and the tower 1 can be downsized, there is no restriction in terms of securing the installation place and the load capacity of the foundation, and therefore, in particular, an absorption type refrigerator is used instead of the existing turbo refrigerator. It can be used without any trouble in cases.

FIG. 2 shows a cooling tower according to a second embodiment of the present invention. In this cooling tower, cross-fillings 3, 3 as cross-flow heat exchangers A, A are disposed on both sides in the tower body 1 in the same manner as the cooling tower of the first embodiment. An air inlet 2 is formed in the tower 1 to be cooled, and a counter-filling 8 as a counter-current heat exchanger B is arranged in a space below the blower 16 sandwiched between the two cross-flow heat exchangers A. In addition to this, a cross-filling 18 is provided below the counter-filling 8 of the countercurrent heat exchange section B, and the other configuration is the same as that of the cooling tower of the first embodiment.

As described above, by utilizing the space below the blower 16 to arrange the counter-filling 8 of the counter-current heat exchange section B and further arranging the cross-filling 18 therebelow, heat exchange is performed. In addition, the cooling capacity per unit area including the amount of treated water can be increased, and the tower 1 can be downsized.

In this case, the cross-filling 1 provided below the lower end of the cross-filling 3 of the cross-flow heat-exchange section A and the counter-filling 8 of the counter-current heat exchange section B is provided.
8 and the lower end of both cross-filling 3, 18
Or the lower end of the cross-filling 3 of the cross-flow heat exchange unit A is set at a position lower than the lower end of the other cross-filling 18. This is to set the flow rates of the air of the two cross-fillings 3 and 18 to be substantially equal so that uniform and efficient cooling of the cooling water can be performed.

By the way, in the first and second embodiments, the cross-filling 3, 3 of the cross-flow type heat exchange section A is
As shown in the drawing, in the case of a two-tier or more-tier configuration, a gap is not formed between the upper and lower cross-fillings in this stack portion, and the space (space) is 10 mm. The minimum is as follows. This is because if there is a gap between the upper and lower cross-fillings in the stacked portion of the cross-fillings 3,3, the air bypasses this gap and the amount of air passing through the cross-fillings 3,3 decreases, and the heat exchange efficiency increases. Is to be reduced. Also, if there is a large space in the cross-filling 3, the air flow is disturbed, the air resistance increases, the amount of passing air decreases, the heat exchange efficiency decreases, and the power of the blower increases.

When the receiving plate of the counter-filling receiver 7 supporting the counter-filling 8 of the counter-flow type heat exchange section B is located in contact with the end face of the cross-filling 3 of the cross-flow type heat exchange section A, the air Since the flow is hindered and the heat exchange efficiency is reduced, the receiving plate of the counter filling receiver 7 of the counter filling 8 is set at a distance of 100 mm or more from the end face of the cross filling 3.

Further, the thickness t2 of the counter-filling 8 of the counter-flow type heat exchange section B is formed smaller than the thickness t1 of the cross-filling 3 of the cross-flow type heat exchange section A. This reduces the air resistance of the counter-filling 8 of the counter-flow heat exchanger B, and reduces the air flow of the cross-filling 3 of the cross-flow heat exchanger A and the counter-filling 8 of the counter-current heat exchanger B. Is set so that the cooling water can be uniformly and efficiently cooled.

Further, in the first and second embodiments, the cross-sectional shape of the cross-filling 3 of the cross-flow type heat exchange section A is made uniform from the upper part to the lower part. As in the third embodiment of the cooling tower of the invention,
The outer surface 3a of the cross-filling 3 is set to a vertical surface,
b is formed on an inclined surface, so that the cross-filling 3
Can be formed to have a trapezoidal cross-section in which the thickness becomes smaller as it goes down. By the way, generally, the flow velocity of the air flowing into the tower 1 from the air inlet 2 is higher at the upper part, and the cooling water flowing down the cross-filling 3 is lower inside the tower 1 at the lower part due to the action of the flowing air. Will be moved to.
For this reason, when the thickness of the cross-filling 3 of the cross-flow heat exchange unit A is made uniform from the upper part to the lower part, the cooling water is sucked together with the air from the upper cross-filling 3 close to the blower 16, which causes water splash. In addition, there is a problem that the air resistance in the lower cross-filling 3 increases. On the other hand, if the cross-filling 3 of the cross-flow type heat exchange section A is formed in a trapezoidal cross-section in which the thickness becomes lower toward the lower side, the cross-sectional area of the lower cross-filling 3 becomes large and the amount of water per unit area decreases. Thus, the air resistance is reduced, the flow rate of the air in the cross-filling 3 is made substantially uniform, the water splash from above the cross-filling is reduced, and the cooling water can be uniformly and efficiently cooled.

By the way, in order to evenly spray the cooling water from the upper water tank 4 to the cross-filling 3 of the cross-flow heat exchange part A, a net pipe or a splash bar is provided between the upper water tank 4 and the cross-filling 3. A sprinkler can be provided. On the other hand, as in the third embodiment shown in FIG. 3, when the cross-filling 3 of the cross-flow type heat exchange unit A is formed in a trapezoidal cross section in which the thickness becomes thicker downward, the cooling water is supplied to the width of the tower 1. A water sprinkler that diffuses in the direction and a cross-filling that diffuses in the depth direction of the tower 1 (inward of the tower 1) can be provided in combination.

[0036]

According to the cross-flow cooling tower of the present invention, a cross-filling as a cross-flow heat exchange unit having a large amount of treated water per unit area is provided, and further, the space below the blower is utilized. By arranging the counter-filling as a counter-current heat exchange unit, the cooling capacity per unit area including the amount of treated water is large, and the tower can be downsized. There are no restrictions. For this reason, in particular, when an absorption type refrigerator is used instead of the existing turbo refrigerator, it can be used without any trouble.

The cross-filling of the cross-flow type heat exchange section has an outer surface formed as a vertical surface and an inner surface formed as an inclined surface. The heat exchange of the water flowing down to the inside of the cross-filling can be performed efficiently under the influence of the air flow flowing from the suction port, the air resistance is reduced, and the water splash from the blower is reduced. Can be.

Further, by forming the thickness of the counter-filling of the counter-flow heat exchanger to be smaller than the thickness of the cross-filling of the cross-flow heat exchanger, the air resistance of the counter-filling of the counter-current heat exchanger is reduced. Thus, the cooling capacity of the counter filling can be sufficiently exhibited.

Further, by disposing a water sprinkling device above the counter-filling of the counter-flow heat exchange section and a cross-filling as a second cross-flow heat exchange section below, the counter of the counter-flow heat exchange section is provided. The cooling water flowing down the filling flows further down the cross-filling of the second crossflow heat exchange section, whereby the cooling capacity per unit area including the amount of treated water can be further improved.

Further, by setting the lower end position of the cross-filling of the cross-flow heat exchange section to be lower than the lower end position of the cross-filling of the second cross-flow heat exchange section, The amount of air passing through the filling can be ensured, and the cooling capacity of the cross filling can be sufficiently exhibited.

Further, by forming a water collecting tank at a position below one cross-filling of the cross flow heat exchange part of the lower water tank, inspection work such as clogging of a strainer of the water collecting tank and an operation state of a ball tap can be performed. This can be easily performed from the outside without a worker entering the cooling tower, and the work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a front vertical sectional view showing a first embodiment of a cooling tower of the present invention.

FIG. 2 is a front vertical sectional view showing a second embodiment of the cooling tower of the present invention.

FIG. 3 is a front vertical sectional view showing a third embodiment of the cooling tower of the present invention.

[Explanation of symbols]

 Reference Signs List A cross-flow heat exchange unit B counter-current heat exchange unit 1 cooling tower 2 air inlet 3 cross-filling 4 upper water tank 5 lower water tank 6 cross-filling receiver 7 counter-filling receiver 8 counter-filling 9 watering device 10 water collecting tank 11 strainer 12 Ball tap 13 Cooling water outlet pipe 14 Cooling water inlet pipe 15 Cooling water inlet pipe 16 Blower 17 Motor

Claims (6)

[Claims] 1. A cross-filling (3) as a cross-flow heat exchange part (A) is disposed on both sides in a tower body (1) of a cooling tower, and the tower body (1) facing the outer surface thereof. A cooling tower having an air inlet (2) formed therein and a counter-filling (8) as a countercurrent heat exchange section (B) disposed in a space below the blower (16). 2. An outer surface (3a) of a cross-filling (3) of a cross-flow heat exchange part (A) is set to a vertical surface, and an inner surface (3).
The cooling tower according to claim 1, wherein the cross-filling (3) is formed to have a trapezoidal cross-section in which the thickness of the cross-filling (3) increases toward the lower side by forming b) on an inclined surface. 3. The thickness (t2) of the counter-filling (8) of the counter-current heat exchange section (B) is determined by changing the thickness (t2) of the crossflow heat exchange section (A).
3. The cooling tower according to claim 1, wherein the thickness of the cross-filling (3) is smaller than the thickness (t1). 4. A water sprinkling device (9) above the counter-filling (8) of the countercurrent heat exchanger (B) and a cross-filling (1) below the counter-flowing heat exchanger (B2) as a second cross-flow heat exchanger (A2).
The cooling tower according to claim 1, wherein 8) is provided. 5. A cross-flow type heat exchange section (A) is provided with a lower end of a cross-filling (3).
5. The cooling tower according to claim 4, wherein the cooling tower is set at a position equal to or lower than a lower end position of the cross filling (18). 6. A water collecting tank (10) formed at a position below one cross-filling (3) of the cross flow heat exchange part (A) of the lower water tank (5).
The cooling tower according to 2, 3, 4 or 5.