JPH0639243Y2 - Collective cooling tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention mainly relates to a large capacity collective cooling tower for industrial use.

(Prior Art) As a collective type cooling tower, for example, there is a technology disclosed in Japanese Patent Application Laid-Open No. 49-120246. In this technique, an exhaust fan is provided on one side of the casing so that air can flow in from one side and flow out from the other side, and the fluid passing through a heat exchanger provided in the middle of the air flow passage can be removed. A large number of coolers that are designed to be cooled are used.The coolers are arranged in a ring shape with the side on which the exhaust fan is installed facing inward, and the ring-shaped coolers are stacked in the required number of stages to form a cooling tower. It has a chimney-shaped exhaust path.

(Problems to be Solved by the Invention) In the above-mentioned conventional technology, since a large number of exhaust fans are installed facing each other on the exhaust path side, the total number of exhaust fans receives the air flow in the reverse flow direction and the pressure on the exhaust side. Rises and pressure loss occurs, so that there is a disadvantage that exhaust efficiency is poor.

Therefore, an object of the present invention is to improve exhaust efficiency.

(Means for Solving the Problems) One of the means for solving the problems in the present invention is claim 1.
As described in 1., the air inlet (2) is opened on one side of the tower casing (1) and the other side is opened as an exhaust port (3) equipped with an exhaust fan (4), and a wet packed bed ( 5) and a cross-flow single-suction cooling tower a in which the lower part is a water tank (6)
A plurality of groups of the cross-flow single-suction type cooling towers a that are arranged annularly and continuously with the air inlet (2) as the outer surface, and are successively stacked upward. It is configured as a tubular body having an exhaust passage (13), an air intake (8) is opened at one side of a tower casing (7) at the uppermost stage, and an exhaust port (upper surface) provided with an exhaust fan (10) ( 9), a wet packed bed (11) is provided inside, and a plurality of countercurrent single-suction cooling towers b having a water tank (12) at the lower part are connected in an annular shape with the air inlet (8) as the outer surface. It is characterized by

Further, as another means for solving the problems, as described in claim 2, in the structure according to claim 1, opening / closing dampers are respectively provided at the exhaust ports (3) of each of the crossflow single-suction cooling towers a stacked in a cylindrical shape. It is characterized by being equipped with (15).

(Operation) In the present invention according to claim 1, each of the cross-flow single-suction cooling towers a of the layers arranged in series in an annular shape is provided with an exhaust fan (4) of an exhaust opening (3) opened inside the tower casing (1). The outside air is sucked into the tower from the air inlet (2) opened to the outside by cooling the wet packed bed (5) while being wetted with the treated water to cool the treated water, and the exhaust air is discharged through the exhaust port. The water discharged from (3) into the exhaust passage (13) and discharged from the upper exhaust port (14) to the outside, and cooled, falls into the lower water tank (6) and stores therein.

As shown in FIG. 5, the water for the wet packed bed (5) of each cooling tower is sent to the sprinkler (16) by the water supply pump (19) installed in the heat source plant (18), and The water cooled in the cooling tower a was drawn in from the water tank (6) of each cooling tower a by the water absorption pump (20).

In the above apparatus, the installation space is set by the number of cross-flow single-suction cooling towers a that are arranged and connected in an annular shape. By stacking cooling towers a in a plurality of layers, the total number of cooling towers a used is Therefore, it is possible to increase the capacity of the operating efficiency regardless of the setting space.

In the above collective cooling tower, the exhaust air from this is blown out into the cylindrical exhaust passage (13) every time the number of stacked layers is increased, and each exhaust fan (4) flows backward from the opposing exhaust fan (4). The wind pressure rises in response to the directional air flow, pressure loss occurs, and the blasting power also increases, but in order to eliminate the inconvenience due to the expansion, the uppermost cooling tower is set as the countercurrent single-suction cooling tower b, and the exhaust air is discharged. The above-mentioned inconvenience due to the addition can be prevented by exhausting the wind upward from the exhaust port (9) on the upper surface.

Further, in the apparatus according to the first aspect, the operation of a part of the cooling towers may be stopped without operating all the cooling towers due to the decrease of the cooling load in the middle period or the winter.

In this case, the relatively warm exhaust gas blown from the exhaust port (3) of the operating cooling tower a into the exhaust passage (13) is transferred to the inside of the cooling tower from the exhaust port (3) of the resting cooling tower. It enters and is discharged from the air inlet (2) through the packed bed (5), which is sucked into the operating cooling tower a and recirculates, which causes a heat loss of the operating cooling tower. However, in order to prevent this recirculation, a normally open opening / closing damper (15) is installed at the exhaust port (3) of the cross-flow single-suction cooling tower a stacked in a plurality of stages as claimed in claim 2, and operated. The inside of the exhaust passage (1) is opened by opening it so as not to interfere with the exhaust air action, and by closing the damper (15) of the cooling tower to be stopped as described above.
It is possible to prevent the exhaust from the side 3) from entering the idle cooling passage and eliminate the adverse effects of recirculation.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings.

In the illustrated example, a plurality of the cross-flow single-suction cooling towers a according to claim 1 are arranged in series in an annular shape, and those arranged in an annular shape are stacked in an appropriate number of layers, while the straight line according to claim 2 A plurality of counter-current single-suction cooling towers b are arranged in a ring shape at the uppermost stage of the laminated tubular body formed by the alternating-current single-suction cooling tower, and the exhaust ports of the cross-flow single-suction cooling tower a according to claim 3 are further connected. Shown in (3) are the opening and closing dampers (15).

The cross-flow single-suction cooling tower a has an air inlet (2) formed open on one side of the tower wall (1), rectifies air by a large number of loopers (2a) and sends the air into the tower, and the other side Is an exhaust fan (4)
An exhaust port (3) equipped with a
A packed bed (5) is formed by allowing water to be sprinkled down from 6) so that it is always wet, and a cooled water tank (6) is provided at the bottom of the tower.
And an eliminator (17) is provided between the exhaust port (3) and the packed bed (5). The outside air is sucked from the air intake (2) and is passed through the packed bed (5) to be orthogonal to the water spray to cool the water, the water is stored in the lower water tank (6), and the exhaust is discharged to the eliminator (17). ) To sufficiently remove the water and then discharge it from the air outlet (3). The total amount of water sprayed to the packed bed (5) of the cooling tower a of each layer is sent to the water spray section (16) of each cooling tower by the water absorption pump (19) installed in the heat source plant section (18), and The water cooled inside was stored in the water tank (6) and was drawn in by the suction pump (20) also installed in the heat source plant section (18).

Although not shown, an opening / closing valve may be provided in the water supply pipe line to control the water supply operation to the cooling tower unit of each layer depending on the situation.

A plurality of cooling towers a having the above-mentioned configuration are arranged and connected in a radial pattern with the air intake (2) as the outer surface, and accordingly, the air exhaust port (3) as the inner surface, and one set of them is installed on the foundation. An annular bottom plate (21) is erected on the upper surface of the lever, and a plurality of cooling towers a are further arranged and connected in an annular shape on the floor plate (21). The common cooling has a chimney-shaped common exhaust passage (13), and the upper end of the chimney-shaped exhaust passage (13) is open to the atmosphere as an exhaust port (14).

An entrance (22) with a door for opening and closing is provided in the annular row of cooling towers a on the bottom plate (21) of each layer, where the cooling tower is not installed. The inner edge (21a) of the annular bottom plate (21) is provided with a small slit like a grating type so as to reduce the increase in pressure loss of exhaust ventilation flowing up the exhaust passage (13). Facilities such as piping attached to the cooling tower a of each layer will be installed on the floor plate (21). The collective cooling tower constructed in this way is constructed so as to be able to withstand earthquake wind pressure and the like by a frame structure (not shown) composed of columns, beams, etc., similar to a general building. Further, the outer wall of the cooling tower can be constructed with a decorative panel to make the appearance beautiful.

In the illustrated example, the case where four annular groups of the cross-flow single-suction cooling tower a are stacked is shown, but the number of stacked layers can be arbitrarily increased or decreased.

As described above, in the case where a plurality of layers of the cross-flow single-suction cooling tower a are stacked in a cylindrical shape, since the exhaust air is blown into the common exhaust passage (13), the exhaust fans (4) face each other. The wind blower (4) receives an air flow in the reverse flow direction to increase the wind pressure, and the wind speed of the exhaust passage (13) increases as the number of layers increases. Therefore, the pressure loss of the blower fan (4) increases. The cooling tower stacked in the uppermost layer to eliminate this is also a countercurrent single-suction cooling tower that blows exhaust air upward rather than blowing it into the exhaust passage. Use b. By doing so, the vertical space of the polygon surrounded by the surface on the opposite side of the air inlet (8) of each tower casing (7) of the cooling cylinder b serves as an air guide passage, and the exhaust air is discharged. Raise the position to promote the chimney action.

In this embodiment, a cross-flow single-suction cooling tower a is laminated on the lower four layers of a five-layer collective cooling tower, and a countercurrent single-suction cooling tower b is laminated on the uppermost layer. It was

In the counterflow single-suction cooling tower b, an air inlet (8) is provided on one side of the tower casing (7), and an exhaust port (9) equipped with an exhaust fan (10) is formed on the upper surface of the tower casing (7). In the casing (7), a filling layer (11) that is wet with water by the water sprinkling part (16) provided in the upper part is formed, a water tank (12) is provided in the lower part, and the exhaust port (9) and the water sprinkling part ( An eliminator (17) is provided between the air conditioner (16) and the eliminator (17), and its structure is the same as that of a known one. By passing through (11), the water is cooled by flowing countercurrently with sprinkling water, the water is stored in the lower water tank (12), and the exhaust gas is sufficiently removed by the eliminator (17) to upward from the exhaust port (9). To release.

In the illustrated example, (15) indicates an opening / closing damper provided on the discharge side of the exhaust port (3) of the crossflow single-suction cooling tower a, and the damper (15) has a shaft (15b) as illustrated in FIG. A large number of blade pieces (15a) that rotate with
5c) vertically moves the operating rod (15d) vertically to simultaneously move the blade pieces (15a) through the connecting piece (15e).
While rotating the cooling tower a, it is opened as shown by the solid line during operation of the cooling tower a so that it does not interfere with the exhaust air operation, but it is closed as shown by the dotted line during suspension of operation and inside the exhaust passage (13). It prevents the exhaust gas from flowing back into the air outlet (3) which is at rest and recirculating the exhaust gas.

The opening / closing damper (15) is not limited to the one described above, and a damper type that can be opened / closed at any time can be used.
Also, these may be provided on the suction side of the cooling tower.

(Effects of the Invention) In the structure of claim 1 according to the present invention, when a large-capacity collective cooling tower is obtained for the purpose of increasing the operating rate, a plurality of cooling tower units are used to increase the number of cooling tower units used. Since the installation space is housed within the planar space required for the annular arrangement of the units because it is stacked in stages and is configured into a three-dimensional cylindrical shape, it is possible to eliminate various adverse effects due to the installation space increasing with each addition, Further, since the uppermost cooling tower unit laminated in multiple stages is a countercurrent single-suction type cooling tower that blows exhaust air upward, the height or number of stages of the crossflow single-suction cooling tower a is set to the countercurrent single-suction type. The cooling tower b can be made as small as the height of the cooling tower b, whereby the amount of air discharged to the central exhaust passage 13 is reduced, the rise of the wind pressure in the exhaust passage is alleviated, and the countercurrent single-suction cooling tower b is provided. Vertical sky surrounded by Was acting as a chimney, a higher release position of the exhaust air promotes exhaust air effects. Further, in the structure according to claim 2, exhaust gas in the common exhaust passage is provided to the exhaust port of the cooling tower unit which is not in operation by providing a regular opening / closing damper at the exhaust port of each crossflow single-suction cooling tower and closing the damper at appropriate times. Has the effect of preventing the reverse flow of air and preventing the harmful effects of the recirculation of the exhaust gas, and is most suitable for district heating and cooling, industrial parks and the like.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a plan view, Fig. 2 is a sectional view taken along the line II-II of Fig. 1, Fig. 3 is a partially enlarged sectional view, and Fig. 4 is an opening / closing damper. FIG. 5 is a cross-sectional view showing an example, and FIG. 5 is a system diagram showing a water supply means. a ... Cross-flow single-suction cooling tower b ... Counter-current single-suction cooling tower (1) (7) ... Cooling tower tower casing (2) (8) ... Air inlet (3) (9) ... Exhaust outlet ( 4) (10) ... Exhaust fan (5) (11) ... Packed bed (6) (12) ... Water tank (15) ... Open / close damper

Claims (2)

[Scope of utility model registration request] 1. An air intake (2) is opened on one side of a tower casing (1), and the other side is opened as an exhaust port (3) equipped with an exhaust fan (4), and a wet packed bed ( 5) is provided and a plurality of cross-flow single-suction cooling towers a whose lower portion is a water tank (6) are annularly arranged and connected with the air intake (2) as an outer surface, and the annular cross-flow is continued. A plurality of single-suction type cooling tower a groups are sequentially laminated on top to form a tubular body having an exhaust passage (13) in the central portion, and an air intake is provided on one side of the tower casing (7) at the uppermost stage. Countercurrent single-suction cooling with an inlet (8) opened, an upper surface serving as an exhaust outlet (9) equipped with an exhaust fan (10), a wet packed layer (11) provided inside, and a lower portion serving as a water tank (12) A collective cooling tower, characterized in that a plurality of towers (b) are connected in an annular shape with an air intake (8) as an outer surface. 2. The set according to claim 1, wherein each of the crossflow single-suction cooling towers a stacked in a plurality of stages in a tubular shape is provided with an opening / closing damper (15) on each of the exhaust ports (3). Type cooling tower.