JP3036737B2 - Countercurrent cooling tower with air intake in lower tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a lower water tank which can be reduced in size to the same or smaller than that of a turbo chiller for an absorption chiller for the same refrigeration capacity. The present invention relates to a counterflow cooling tower provided with an air intake.

[0002]

2. Description of the Related Art Cooling towers are widely used for cooling water for cooling air-conditioning equipment and industrial equipment, but the type of refrigerator is changing from a centrifugal refrigerator to an absorption refrigerator due to CFC regulations. is there. In this case, for the same refrigeration capacity,
Cooling towers for absorption chillers compared to cooling towers for turbo chillers
The inlet water temperature is high, the water temperature difference is large, the amount of water is large, and the cooling tower for the absorption refrigerator requires 1.5 times or more the capacity of the same refrigeration capacity. For this reason, as the cooling tower for the absorption chiller, use a cooling tower that is one or two sizes larger, such as for cooling for a turbo, or a cooling tower dedicated to the absorption chiller in which the tower body is enlarged to increase the air volume. And so on. However, in this case, there is a problem that an installation area becomes large. In addition, in order to cool a large amount of water, a cross-flow method is generally used for these cooling methods. In addition, the cooling method of the cooling tower is roughly classified into a countercurrent type and a cross-flow type, and the performance of the packing is generally excellent in the countercurrent type, and the cross-flow type is generally used to treat a large amount of water. ing.
In the case of the countercurrent type, the treated water amount per unit area is less than half of that of the crossflow type.However, in the case of the crossflow type, the space portion directly below the blower is large, and the amount of treated water per plane area of the whole tower is There is no big difference between the countercurrent type and the crossflow type.

[0003]

In the above-mentioned conventional cooling tower, the cooling tower for the absorption chiller requires a larger cooling capacity for the same refrigeration capacity than the cooling tower for the turbo chiller. Because the cooling system is the same as the cooling tower for the machine (mainly cross-flow type), the tower body is large and the flat area is large, so the weight is heavy, the load capacity of the foundation needs to be increased, and the installation will be performed as the installation area increases. Space needs to be secured. In addition, the one with the increased air volume has a problem that the electric motor capacity of the blower becomes large. On the other hand, when the counterflow type is adopted as the cooling method, the height of the air intake increases, and the tower body increases. In addition, cooling towers are often used annually, and the frequency of inspections such as clogging of strainers in the collection tank and the operation of ball taps is increasing.In conventional cooling towers, the collection tank is located almost in the center of the lower tank. However, there is a problem that it is not possible to enter the tower during maintenance and inspection.

[0004] The present invention solves the above-mentioned problems of the conventional cooling tower, employs a countercurrent type as a cooling tower, which is excellent in the performance of the packing material, and is provided not only on the side of the tower but also in the center of the lower water tank. In addition, an opening for air intake, that is, an air inlet, is provided, and packing is also incorporated in the space below the packing to improve the effective use of the space inside the tower, increase the cooling capacity, and reduce the size. A counter-current type with an air intake in the lower water tank, where the water collection tank provided in the water tank is provided on the side air intake side so that clogging of the strainer and the operation of the ball tap can be checked directly from the side air intake. It is intended to provide a cooling tower.

[0005]

In order to achieve the above object, a counter-current cooling tower according to the present invention, in which an air inlet is provided in a lower water tank, is configured to suck outside air from an air inlet on a side of the tower body. In the counter-flow cooling tower, a water collecting tank connected to a lower water tank disposed below the packing formed by incorporating the cross filling below the counter filling is provided on the air inlet side of the tower body side, and the lower An air inlet for introducing outside air from the lower part of the water tank is formed in the water tank, a space is provided above the air inlet, a water receiver is provided, and air introduced into the tower body from the air inlet provided in the lower water tank is formed. And a packing material comprising a cross-filling and a counter-filling, which passes through a space above the space above the water receiver.

[0006] In the counter-current cooling tower provided with an air inlet in the lower water tank of the present invention having the above-described structure, the cooling water from the load first enters the water sprinkler, sprays water from the water sprinkling hole to the water sprinkling pipe, The water is diffused on the packing material, and the water is sprinkled on the filling material.The sprinkled water flows through the inside of the counter filling, further flows through the cross filling incorporated in the space of the air intake, is collected in the lower water tank, and Is sucked from the air inlet on the side and the air inlet provided in the lower water tank by the blower, passes through the cross-filling and counter-filling, exchanges heat with water, and is discharged to the atmosphere from the outlet when the cross-filling Inside, water (water that has exchanged heat with air in the counter-filling) and air intersect at right angles, and perform heat exchange by direct contact. Water (water sprinkled from the load) and air (air that has exchanged heat with water in the cross-filling) flow in the opposite flow to perform heat exchange by direct contact, which allows efficient use of the space inside the tower. The cooling capacity can be increased and the size can be reduced. Further, the water collecting tank is provided on the side of the air intake side, and the clogging of the strainer and the operation state of the ball tap can be visually recognized from the air intake, so that the time of maintenance and inspection can be reliably identified. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a countercurrent cooling tower according to the present invention in which an air inlet is provided in a lower water tank will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a main body of a counter-current cooling tower having an air inlet also provided in a lower water tank. The tower body 2 of the counter-current cooling tower has air inlets 3 on opposite sides. , 3 are provided, and an air inlet 5 is provided at a center position of a lower water tank 4 provided at a lower part of the tower body 2 so as to penetrate the lower water tank. External air is taken into the tower from the two air inlets 3 and 5, and a larger amount of air flows through the packing by the air sucked from the outer surface of the tower and the air sucked from the bottom of the tower. Make it circulate.

In the tower 2, an eliminator 6, a watering device 7, a counter filling 8 and a cross filling 9 as packing are sequentially arranged from the top of the tower.

At the side of the tower 2 where the cross-filling 9 is provided, air inlets 3 and 3 are formed, and a lower water tank 4 is provided below the tower 2 to exchange heat inside the packing. The cooling water descends while receiving, and the base 10 supports the entire tower 2. The side surface of the tower 2 at the position where the counter filling 8 above the air intakes 3 and 3 is disposed is surrounded by the side plate 11.

The water sprinkling device 7 is provided with a cooling water inlet pipe 12 at one end so that cooling water returned from a load is supplied to the water sprinkling device, and impurities mixed in the lower water tank 4 are removed. Strainer 13, a ball tap 14 for replenishing water while keeping the water level of the lower water tank 4 constant, and a cooling water outlet pipe 15 for collecting cooled cooling water from the lower water tank 4 and supplying it again to the load side. Equipped water collection tank 16
Is provided on the side of the tower body 2 on the side of the air intake 3.
A water receiver 17 is provided on the lower surface of the counter filling 8.
Is provided.

A blower 18 for sucking outside air and a motor 19 for driving the blower 18 are provided at the upper part of the tower 2. Further, a watering pipe 20 is provided on the counter filling 8 below the watering device 7.

The cooling water enters through a cooling water inlet pipe 12 and is sent to the sprinkler 7. The water in the sprinkler 7 is sprinkled from the sprinkler holes of the sprinkler 7 and the sprinkler pipe 20 arranged below.
, Falls while being diffused, and is sprinkled on the counter filling 8. Thereafter, the cooling water passes through the inside of the counter filling 8, then falls in the cross filling 9, and falls into the lower water tank 4. At this time, the cooling water is located above the air inlet 5 provided at the center position of the lower water tank. Is provided with a water receiver 17, so that a part of the cooling water falls through the water receiver 17 to the lower water tank 4 so as not to flow out from the air inlet 5. The cooling water thus cooled is collected in a water collecting tank 16 provided in the lower water tank 4, and then collected.
After passing through the strainer 13, it is returned to the load from the cooling water outlet pipe 15.

On the other hand, air is blown by a blower 18 driven by an electric motor 19 into an air inlet 3 formed in the side of the tower 2 and an air inlet 5 formed in the center of the lower water tank 4.
The cross-filling 9 is taken into the tower body 2 and flows into the cross-filling 9 from the inner and outer sides of the cross-filling 9.
The water flows upward in the cross-filling 9, flows upward from the inside in the counter-filling 8, and after being separated by the eliminator 6, is discharged into the atmosphere from the upper part of the tower 2.

In the counter-filling 8, water and air, that is, air that has exchanged heat with water while passing through the cross-filling 9 flows in opposition, and heat exchange is performed by direct contact. The cooling water and the air that have exchanged heat with the air while passing through the counter-filling 8 intersect at right angles, and heat exchange is performed by direct contact.

The provision of the air inlet 5 at the center of the lower water tank 4 increases the amount of air flowing into the tower 2 and increases the height of the tower 2, which is a drawback of the conventional countercurrent type. Can be prevented, and the tower 2 can be lowered. Further, a cross-filling 9 is provided in a space inside the air inlet 3 below the counter filling 8, and the air inlet 3 formed on the side surface of the tower 2 and the air inlet 5 formed in the center of the lower water tank 4. The heat exchange efficiency can be increased by the large amount of air taken in from, the tower 2 can be downsized, and at the same time the plane area can be reduced.

Clogging of the strainer 13 in the water collecting tank 16 and inspection of the ball tap 14 can be ensured through the air inlet 3 on the side surface, and the air inlet 3 is removed during maintenance such as cleaning and replacement. More easily.

[0018]

According to the countercurrent cooling tower of the present invention in which the lower water tank is provided with an air inlet, since the air inlet is also provided in the central portion of the lower water tank, the suction height can be reduced. At the same time as the body height can be reduced, fresh air enters through the opening of the air intake of the lower water tank, and the heat exchange performance can be improved. In addition, by incorporating the cross-filling in the space below the counter-filling, the space inside the tower can be effectively used, the cooling capacity can be improved, and the tower can be downsized. For this reason, a cooling tower having a flat area equal to or smaller than that of the turbo chiller can be formed for the absorption chiller for the same refrigeration capacity, and it is not necessary to take a large installation space. In particular, when replacing a refrigerator from a centrifugal refrigerator to an absorption refrigerator, the refrigerator can be replaced in the same space, and there is no need to consider the installation space. The downsizing of the tower also reduces the weight and does not require an increase in the load capacity of the foundation. Since the water collecting tank is provided on the side of the air intake side, inspection and maintenance such as clogging of the strainer, operation confirmation of the ball tap, and replacement can be easily performed without entering the tower from the air intake.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a countercurrent cooling tower provided with an air inlet in a lower water tank of the present invention.

FIG. 2 is a plan view of a lower water tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Counter-current cooling tower 2 Tower 3 Air inlet 4 Lower water tank 5 Air inlet 6 Eliminator 7 Sprinkler 8 Counter filling 9 Cross filling 10 Base 11 Side plate 12 Cooling water inlet pipe 13 Strainer 14 Ball tap 15 Cooling water outlet pipe 16 Water collecting tank 17

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F28F 25/04 F28C 1/02-1/06

Claims (1)

(57) [Claims] 1. A counter flow cooling tower in which outside air is sucked from an air inlet on the side of a tower body, wherein a lower water tank disposed below a packing, which is constructed by incorporating a cross filling below a counter filling, is provided. A water collecting tank to be connected is provided on the side of the tower on the air intake side, and an air intake for introducing outside air from the lower part of the water tank is formed in the lower water tank, and a space is provided above the air intake to provide water. Set up a tray,
The lower part is characterized in that the air introduced into the tower from the air inlet provided in the lower water tank passes through the space above the water receiver, passes through the packing composed of the cross-filling and the counter-filling, and the lower part is characterized in that A countercurrent cooling tower with an air intake in the water tank.