JPH10238968A - White fuming preventing cooling tower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a heat exchange efficiency by projecting a windward side of a dry filler to a windward side from a windward side of a wet filler to enhance white fuming preventing effect in a direct and alternate type cooling tower charged with the dry and wet fillers in combination. SOLUTION: In a direct and alternate type cooling tower 1 for exchanging heat between many fillers by sprinkling water via a sprinkling nozzle 31 from a sprinkling tank 3 while introducing the atmosphere into the tower of the type that the fillers are charged in combination of the dry and wet fillers 21 and 22, a windward side of the filler 21 is provided to project to the windward side by a protruding width d-1 from the windward side of the filler 22. An upperside 212 of the filler 21 is projected upward by a protruding width d-2 from the side 22 of the filler 22. Thus, dry air is passed through a dry air duct between the fillers 21 as the dry air remains, and exhausted from an exhaust port 4 as in the sate without white fuming.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling tower for preventing white smoke, and more particularly, to a combination of a dry-type filler and a wet-type filler, which is combined with a cross-flow type cooling tower. The present invention relates to a white smoke prevention cooling tower for preventing smoke.

[0002]

2. Description of the Related Art Conventionally, a cooling tower is generally operated in a cold season or the like, and when high-temperature saturated air is discharged out of the tower, a white smoke state is generated and the cooling tower is exposed to the white smoke. Buildings, road surfaces, trees, etc. downwind can be severely damaged by condensation and icing of supersaturated air.

[0003] In addition, residents in the neighborhood feel disgust as if white smoke is contaminating the outside air. At night, when red light is applied to the white smoke, it is mistaken for a fire, which hinders firefighting activities. In recent years, various measures have been taken to prevent the generation of white smoke from the cooling tower.

[0004] For example, Japanese Patent Publication No. 5-2916 discloses a means for preventing the generation of white smoke from a dry-wet cooling water tower. That is, as shown in the front vertical sectional view in FIG. 4, a fin tube type heat exchanger b is provided above the wet cooling unit a,
The air flowing in the direction of the arrow, which has become saturated with high temperature in the wet cooling section a, is mixed with the air flowing in the direction of the arrow, heated by the heat exchanger b in the dry cooling section, and is discharged from the discharge port to the outside by the blower fan. The generation of white smoke is prevented by keeping the relative humidity of the air below the saturation humidity.

However, in the above-mentioned conventional means, a fin tube type heat exchanger is required as a dry portion, so that the structure of the cooling water tower becomes complicated and
There are problems such as complicated driving operation.

[0006] For example, Japanese Unexamined Patent Publication No. 7-280494 discloses a filling method for forming a dry air passage for preventing generation of white smoke in a cross-flow cooling tower 5A as shown in a front vertical sectional view of FIG. An eliminator-filled plate member 51-1 in which an eliminator 513 that is inclined outward and downward is integrally provided at a side end of the material 51 on the outside air introduction side is disclosed. That is, it is known that an eliminator 513 is provided to prevent water from flowing into a dry portion through which low-humidity air passes in order to prevent the generation of white smoke from the dry-wet cooling tower. However, the eliminator 513
In addition to the disadvantage that the resistance to the introduction of air is increased and the pressure loss is increased, the eliminator 513 is integrally attached to the filler 51, so that the molding cost increases, which is not preferable. is there.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the gist of the present invention is to provide a cross-flow type cooling tower comprising a combination of a dry-type filler and a wet-type filler. In the white smoke prevention cooling tower that performs heat exchange by ventilating, the windward side of the dry part filler protrudes more windward than the windward side of the wet part filler. It is a smoke prevention cooling tower.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a front vertical sectional view of one embodiment of the present invention, FIG. 2 is a side view of a filler to be charged into a cooling tower in one embodiment of the present invention, and FIG. FIG. 3 is a front view showing a filler to be charged into the cooling tower in the embodiment of FIG.

In the present invention, as shown in FIG. 1 as a front vertical sectional view, FIG. 2 as a side view, and FIG. 3 as a front view, a combination of a dry-type filler 21 and a wet-type filler 22 is loaded. In the white smoke prevention cooling tower that performs heat exchange by passing air through the cross-flow cooling tower 1 formed as described above, the windward side 211
However, it is characterized in that it protrudes further to the windward side than the windward side edge 221 of the wet part filling material 22.

According to the present invention, the white part filler 21 is protruded further to the windward side than the wet part filler 22 and is merely loaded into the cooling tower, so that the effect of preventing white smoke is large and an eliminator is not required. Therefore, the pressure loss due to the introduction of air is small, the operation cost of the cooling tower is low, and the effect of reducing the molding cost of the filler 2 is achieved.

[0011]

【Example】

(Embodiment 1) As shown in the front vertical sectional view of FIG. 1, the present invention introduces outside air into the tower from left and right arrow directions,
Water is sprayed from a water spray tank 3 placed on the upper part of the tower through a water spray nozzle 31, and a cross-flow type cooling tower 1 in which heat is exchanged by flowing down between a large number of fillers 2 stacked in an upright state at a predetermined interval. The filler 2 is obtained by combining and loading the dry-type filler 21 and the wet-type filler 22 in different phases.

In other words, the windward side edge 211 of the dry portion filler 21 shown by the solid line extends beyond the windward side edge 221 of the wet portion filler 22 shown by the alternate long and short dash line by the protrusion width d-1 to the windward side. Is the biggest feature. The overhang protrusion width d-1 is 2,000 to 3,000 mm in width.
Since it is necessary to allow 50 to 300 mm for the wet part filler 22, the width of the dry part filler 21 is 2,
It is set to 050 to 3,300 mm.

As described above, if the windward side edge 211 of the dry portion filler 21 is made to project to the windward side by a protruding width d-1 from the windward side edge 221 of the wet portion filler 22, the watering nozzle Since the splash of water flowing down from 31 does not flow into the dry air passage 21-1 between the dry part fillers 21 and 21,
Dry air passage 21-1 with dry air disconnected from water
, Which merges with the humid air that has passed through the wet air passage 22-1 between the one wet portion fillers 22, 22 and rises in the direction of the arrow shown in FIG. The air is released from the supersaturated state and is discharged from the exhaust port 4 without white smoke.

At the upper end of the filler 2, the upper side 212 of the dry part filler 21 shown by the solid line is projected more than the upper side 222 of the wet part filler 22 shown by the dashed line d−2.
Just overhang it. The overhang projection width d-2 is about 2,000 mm for the wet portion filler 22 having a vertical width of 1,900 to 2,900 mm in this example, and the vertical width of the dry portion filler 21 is set to 2,000. Set to about 3,000 mm.

As shown in the side view of FIG. 2, the upper side 212 of the dry portion filler 21 is protruded above the upper side 222 of the wet portion filler 22 by a projecting width d-2, whereby Splashes of water flowing down from the watering nozzle 31 in the direction of the arrow are prevented from being scattered from above into the dry air path 21-1 between the dry part fillers 21 and 21 and reliably flow into the wet air path 22-1. Therefore, it is more preferable.

(Embodiment 2) As shown in the front view of FIG. 3, the windward side 211 of the dry portion filler 21 shown by a solid line is the windward side of the parallelogram wet portion filler 22 shown by a dashed line. The protruding width d-1 is protruded to the windward side from the bottom of the side 221 by a protruding width d-1, and the protruding protruding width d-1 has a width of 2,000.
50 to 3 for wet part filler 22 of ~ 3,000 mm
In anticipation of 00 mm, the horizontal width of the bottom of the dry portion filler 21 is set to 2,050 to 3,300 mm.

At the upper end of the filler 2, the upper side 212 of the dry part filler 21 shown by the solid line is projected more than the upper side 222 of the wet part filler 22 shown by the dashed line d−2.
Only overhangs. This overhang protrusion width d-2
Sets the vertical width of the dry part filler 21 to about 2,000 to 3,000 mm in consideration of the wet part filler 22 having a vertical width of 1,900 to 2,900 mm in this example. .

As described above, the dry part filler 21 is d-1 in the horizontal width and d-2 in the vertical width of the bottom part more than the wet part filler 22.
If only the respective protrusions are formed, the water flowing down from the watering nozzle 31 does not flow into the dry air passage 21-1, so that the dry air passes through the dry air passage 21-1 as dry air,
This merges with the humid air that has passed through one of the wet air passages 22-1, rises in the direction of the arrow as in the first embodiment, and is then released from the supersaturated state while being mixed by the exhaust fan 41, without white smoke. It is discharged from the exhaust port 4 in the state.

According to the present invention having the above-described structure, the dry portion filler 21 is projected to the windward side from the wet portion filler 22, and is preferably projected upward together with the windward portion to be incorporated in the crossflow type cooling tower. Only by loading, the white smoke prevention effect is excellent, and the heat exchange efficiency is maintained at a high level, so that there is no need to install an eliminator, there is little pressure loss due to the introduction of air, and the molding cost of the filler 2 is low. It is a thing.

[0020]

Since the present invention has the above-described structure, the following effects can be obtained. That is, according to the present invention, the dry-type filler is protruded upward along with the wind-side filler from the wet-type filler, and is only incorporated into the cross-flow cooling tower, so that the white smoke prevention effect is excellent and the heat exchange efficiency is high. Since it is maintained at a high level, and since there is no need to attach an eliminator, there is an effect that the pressure loss with respect to the introduction of air is small and the molding cost of the filler is low.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention in a front longitudinal sectional view.

FIG. 2 is a side view showing a packing material to be charged into a cooling tower according to an embodiment of the present invention.

FIG. 3 is a front view showing a packing material to be charged into a cooling tower in another embodiment of the present invention.

FIG. 4 shows an example of the prior art in a front longitudinal sectional view.

FIG. 5 is a front longitudinal sectional view showing another example of the prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cross-flow type cooling tower 2 Filling material 21 Dry type packing material 21-1 Dry air path 211 Upwind side 212 Upper side 22 Wet type packing material 22-1 Wet air path 221 Upwind side 222 Upper side 3 Watering tank 31 watering nozzle 4 exhaust port 41 exhaust fan

Claims (2)

[Claims] 1. A white smoke prevention cooling tower, in which heat is exchanged by passing a heat through a cross-flow cooling tower, which is a combination of a dry-type filler and a wet-type filler, is installed on the windward side of the dry-type filler. A white smoke prevention cooling tower, wherein a side protrudes to the windward side from a windward side of the wet-type part filling material. 2. The windward side of the dry part filler protrudes more windward than the windward side of the wet part filler.
2. The white smoke prevention cooling tower according to claim 1, wherein an upper side of the dry portion filler projects above an upper side of the wet portion filler.