KR102217511B1 - Plume abatement cooling tower - Google Patents

Abstract

The present invention relates to a plume abatement cooling tower. One aspect of a plume abatement cooling tower according to an embodiment of the present invention comprises: a casing in which a main intake port through which air is sucked is formed on a side surface, and an exhaust port through which air is exhausted is formed on an upper surface; a water supply unit installed inside the casing and supplying cooling water; a blowing unit forming a flow of air going into and out of the casing through the main intake port and the exhaust port; a filler installed inside the casing and exchanging heat between the air sucked through the main intake port by the blowing unit and the cooling water supplied by the water supply unit; a water collecting unit installed inside the casing and collecting cooling water which has been heat-exchanged with the air by the filler; and an eliminator eliminating moisture in the air discharged to the outside through the exhaust port, wherein at least a portion of the eliminator extends long up and down and the other portion of the eliminator extends long in a horizontal direction.

Description

White smoke reduction cooling tower{PLUME ABATEMENT COOLING TOWER}

The present invention relates to a white smoke reduction cooling tower.

The cooling tower serves to cool cooling water by contacting air with cooling water, for example, cooling water used for condensing a refrigerant flowing through an air conditioner or refrigerator, that is, a refrigeration cycle. In such a cooling tower, in order to heat-exchange the high-temperature cooling water, the cooling water is injected into the air or the flowing cooling water is brought into contact with the blown air.

In such a cooling tower, components constituting the cooling tower, such as a water supply part, a blower part, a heat exchange part, and a water collecting part, are installed inside a casing defining the exterior. The cooling water supplied from the water supply unit flows along the heat exchange unit and exchanges heat with the air sucked into the casing by driving the blower unit. The air heat-exchanged with the cooling water is discharged to the outside of the casing by the continuous driving of the air blower, and the cooling water heat-exchanged with the air is collected in the water collecting unit.

On the other hand, in the case of winter, there is a concern that white smoke may occur in which moisture in the air discharged to the outside of the casing condenses due to the low temperature. Various techniques have been proposed to reduce the occurrence of white smoke. Conventionally, only when there is a concern about the generation of white smoke, air sucked into the casing is mixed with air that has been heat-exchanged with cooling water, or is mixed with air that has been heat-exchanged with cooling water after being heated. However, in such a conventional technique, since the air sucked into the casing is simply mixed with the cooling water and the heat-exchanged air or heated and then mixed with the cooling water and the heat-exchanged air, there is a disadvantage of low white smoke reduction efficiency.

In addition, an eliminator for removing moisture in air discharged to the outside of the casing after heat exchange with cooling water may be provided inside the casing. In such an eliminator, while air flows through a flow path formed therein in a zigzag shape, moisture in the air is removed by collision of air or interference with the flow of air.

By the way, in general, the eliminator is disposed elongated in the horizontal direction below the air blower. Therefore, as described above, when air is sucked into the casing for mixing coolant and heat-exchanged air to reduce white smoke, the height corresponding to the (auxiliary) intake port for inhaling air and the air blower The eliminator is placed in. Therefore, in the related art, there is a disadvantage that the height of the casing is increased by the installation of the eliminator.

Republic of Korea Public Utility Model No. 2010-0008019 (Name: Suction ventilation cooling tower for preventing white smoke) Korean Patent Registration No. 1839454 (Name: Cooling Tower) Republic of Korea Patent Publication No. 2016-0074734 (Name: white smoke reduction cooling tower with dry air flow path)

The present invention is to solve the problems caused by the prior art as described above, and an object of the present invention is to provide a white smoke reduction cooling tower that is configured to more efficiently reduce the generation of white smoke.

Another object of the present invention is to provide a white smoke reduction cooling tower configured to minimize an increase in the height of the casing.

One aspect of a white smoke reduction cooling tower according to an embodiment of the present invention for achieving the above object includes a casing in which a main intake port through which air is sucked is formed on a side surface, and an exhaust port through which air is discharged is formed on an upper surface; A water supply unit installed inside the casing and supplying cooling water; A blower for forming a flow of air flowing in and out of the casing through the main intake and exhaust ports; A filler installed in the casing and heat-exchanging heat between the air sucked through the main intake port by the blower and the cooling water supplied from the water supply part; A water collecting part installed inside the casing and collecting cooling water heat-exchanged with air in the filler; And an eliminator for removing moisture in the air discharged to the outside through the exhaust port. Including, at least a portion of the eliminator is elongated vertically, and another portion of the eliminator is elongated in a horizontal direction.

An aspect of an embodiment of the present invention further includes a heating unit installed inside the casing and selectively heating air discharged to the outside through the exhaust port after moisture is removed by the eliminator, and the exhaust port Air discharged to the outside through the air is selectively heated by the heating unit in a state in which moisture has been removed by the eliminator.

In one aspect of the embodiment of the present invention, the eliminator is formed to have a longitudinal section of a'┗┛' shape, and divides the interior of the casing into a space in which the exhaust port and the heating unit are located and the remaining space. It is placed on the top.

In one aspect of the embodiment of the present invention, in the casing, an auxiliary intake port through which air is sucked is formed on a side surface corresponding to the upper side of the main intake port, and a part extending in a vertical direction of the eliminator includes the auxiliary intake port and They are arranged to overlap in the horizontal direction.

Another aspect of an embodiment of the present invention is a casing in which a main intake port through which air is sucked is formed on a side surface, and an exhaust port through which air is discharged is formed on an upper surface; A water supply unit installed inside the casing and supplying cooling water; A blower for forming a flow of air flowing in and out of the casing through the main intake and exhaust ports; A filler installed in the casing and heat-exchanging heat between the air sucked through the main intake port by the blower and the cooling water supplied from the water supply part; A water collecting part installed inside the casing and collecting cooling water heat-exchanged with air in the filler; And an eliminator for removing moisture in the air discharged to the outside through the exhaust port. Including, the eliminator, each extending vertically, two first parts disposed to be spaced apart from each other in a horizontal direction; And a second part whose both ends are respectively connected to the lower end of the first part. Includes.

In another aspect of the embodiment of the present invention, in the casing, an auxiliary intake port through which air is sucked is formed on a side corresponding to the upper side of the main intake port, and at least a part of the first part overlaps the auxiliary intake port in a horizontal direction. do.

In another aspect of the embodiment of the present invention, at least a portion of the second part overlaps the exhaust port in a vertical direction.

Another aspect of the present invention is that it is installed inside the casing surrounded by the exhaust port and the first part and the second part, and after moisture is removed by the eliminator, it is discharged to the outside through the exhaust port. It further includes a heating unit for selectively heating the air.

According to the white smoke reduction cooling tower according to an embodiment of the present invention, the following effects can be expected.

First, in the embodiment of the present invention, moisture in the air discharged through the exhaust port is firstly removed by an eliminator, and then heated by a heating unit and secondarily removed. In particular, in the embodiment of the present invention, when there is a concern about the generation of white smoke, the air sucked through the main intake port and heat-exchanged with the cooling water and the air sucked through the auxiliary intake port are mixed and heated while passing through the heating unit, and then through the exhaust port. In other cases, the air sucked through the main intake port and heat-exchanged with the cooling water is discharged through the exhaust port without passing through the heating unit. Therefore, according to the embodiment of the present invention, it is possible to more efficiently reduce the occurrence of white smoke depending on whether or not white smoke is generated.

In addition, in the embodiment of the present invention, the eliminator has a longitudinal section in the shape of a'┗┛' so as to partially overlap the auxiliary intake port in the horizontal direction, and a heating part is substantially installed inside the eliminator. Accordingly, according to the exemplary embodiment of the present invention, compared to the case where the eliminator is installed above or below the auxiliary intake port, it is possible to relatively minimize an increase in the height of the casing.

1 is a longitudinal sectional view showing a white smoke reduction cooling tower according to a first embodiment of the present invention.
Figure 2 is a longitudinal cross-sectional view showing a white smoke reduction cooling tower according to a second embodiment of the present invention.
3 and 4 are operational state diagrams showing the flow of air and cooling water in the white smoke reduction cooling tower according to the second embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the configuration of the white smoke reduction cooling tower according to the first embodiment of the present invention will be described in more detail.

1 is a longitudinal sectional view showing a cooling tower according to a first embodiment of the present invention.

Referring to FIG. 1, the cooling tower 1 according to the present embodiment includes a casing 100, a water supply part 200, a blowing part 300, a plurality of fillers 400, a water collecting part 500, and a heating part ( 610) and an eliminator 701. The casing 100 defines a predetermined space in which the constituent parts constituting the cooling tower 1 are installed. In addition, the water supply unit 200 serves to supply cooling water to be heat-exchanged. The air blower 300 serves to flow the air that is heat-exchanged with the cooling water in and out of the casing 100. The filler 400 is a place in which heat exchange between the cooling water supplied by the water supply unit 200 and the air flowing by the air blower 300 is performed, and the collecting unit 500 includes the filler 400 ), where the heat-exchanged coolant is collected. And the heating unit 610 selectively heats the air discharged to the outside through the exhaust port 120, and the eliminator 701 removes moisture from the air discharged through the exhaust port 130 do.

More specifically, the casing 100 is formed in a predetermined shape, for example, a hexahedral shape. The casing 100 is provided with a main intake port 111, an auxiliary intake port 112, and an exhaust port 120. For example, the main intake ports 111 may be positioned below both side surfaces of the casing 100, and the auxiliary intake ports 112 may be positioned above both side surfaces of the casing 100. In addition, the exhaust port 120 may be located in the center of the upper surface of the casing 100. The main intake port 111 and the auxiliary intake port 112 are a place where air is sucked into the casing 100, and the exhaust port 120 is a place where air is discharged to the outside of the casing 100. . Of course, the number and positions of the main intake port 111, the auxiliary intake port 112, and the exhaust port 120 are not limited thereto.

The water supply part 200 is disposed inside the casing 100 corresponding to the main intake port 111 and the auxiliary intake port 112. In this embodiment, the water supply unit 200 includes a water supply pipe 210 and a plurality of water supply nozzles 220. The water supply pipe 210 is a place where cooling water to be heat-exchanged with air flows. In addition, the water supply nozzle 220 is a place where the coolant flowing through the water supply pipe 210 is sprayed toward the filler 400. For example, the water supply pipe 210 may extend upward from the outside of the casing 100 and then be introduced into the casing 100.

Meanwhile, the blower 300 includes a blower fan 310 and a blower motor 320. The blowing fan 310 serves to flow air into and out of the casing 100. That is, when the blowing fan 310 rotates, air is sucked into the casing 100 through the main intake port 111 to exchange heat with the cooling water, and the air exchanged with the cooling water passes through the exhaust port 120. It is discharged to the outside of the casing 100. As the blowing fan 310, for example, an axial fan may be used. The blowing motor 320 provides a driving force for rotation of the blowing fan 310.

The filler 400 is disposed in the casing 100 vertically between the main intake port 111 and the water supply pipe 210. Further, in the filler 400, heat exchange between air and cooling water is performed. Substantially along the surface of the filler 400 or the space between the fillers 400, the cooling water sprayed from the water supply nozzle 220 flows from the top to the bottom, and the air sucked through the main intake hole 111 Flows from the bottom to the top and contacts each other for heat exchange. To this end, the filler 400 is disposed below the water supply part 200 and substantially below the water supply nozzle 220.

In the water collecting part 500, cooling water that has exchanged heat with air while flowing along the surface of the filler 400 is collected. The water collecting part 500 is disposed under the casing 100 corresponding to the lower side of the main intake port 111.

Meanwhile, the heating part 610 may be formed in a hollow polyhedral shape in which the inside thereof is in vertical communication with the exhaust port 120. For example, the heating unit 610 may be formed in the shape of a hollow cylinder or a hexahedron. In addition, the air passing through the heating unit () is heated by heat exchange between the air discharged to the outside through the exhaust port () and a heat exchange fluid flowing inside the heating unit (). To this end, the heating unit () may include a tube through which a heat exchange fluid flows and a plurality of fins intervening in the tube.

In this embodiment, the heating unit 610 is spaced apart from the projection of the exhaust port 120 in the horizontal direction and is disposed above the auxiliary intake port 112 in the vertical direction. That is, the heating part 610 is located above the auxiliary intake port 112 in a vertical direction and its interior communicates with the exhaust port 120.

In addition, an exhaust flow path 610S is defined inside the heating unit 610. The exhaust passage 610S is vertically communicated with the exhaust port 120. Accordingly, heated air flowing in a horizontal direction and passing through the heating unit 610 or air flowing through the exhaust passage 610S in a vertical direction is discharged to the outside through the exhaust port 120.

Meanwhile, the present embodiment may further include an opening/closing member 620 that selectively opens and closes the bottom surface of the heating part 610, that is, the exhaust flow path 610S. Substantially, in a state in which the exhaust passage 610S is shielded by the opening/closing member 620, air that is sucked through the main intake port 111 and heat-exchanged with the cooling water is sucked through the auxiliary intake port 112. It is mixed with and flows in a horizontal direction, is heated while passing through the heating unit 610, and then discharged to the outside through the exhaust port. And when the exhaust flow path 610S is opened by the opening/closing member 620, the air sucked through the main intake port 111 and heat-exchanged with the cooling water flows through the exhaust flow path 610S in a vertical direction. The air discharged to the outside through the exhaust port () or sucked through the main intake port 111 and heat-exchanged with the cooling water is mixed with the air sucked through the auxiliary intake port 112 and then the exhaust flow path 610S in the vertical direction. May be discharged to the outside through the exhaust port 120.

In particular, in the present embodiment, the opening/closing member 620 may guide air to flow through the exhaust flow path 610S while the exhaust flow path 610S is open. For example, the opening/closing member 620 may be configured as a plurality of openings and closing the exhaust passage 610S by rotating about an axis in a horizontal direction. In addition, when the exhaust flow path 610S is open, the opening/closing members 620 may be disposed in a vertical direction, respectively.

In addition, the eliminator 701 may be formed to have a longitudinal section of a'┗┛' shape in which at least a part extends long in a vertical direction and another part extends long in a horizontal direction. Accordingly, the eliminator 701 is disposed above the casing 100 so that the interior of the casing 100 is divided into a space in which the exhaust port 120 and the heating unit 610 are located and the remaining space. do. In this embodiment, the eliminator 701 is disposed above the auxiliary intake port 112. Therefore, the air discharged to the outside through the exhaust port 120, that is, the air sucked through the main intake port 111 and heat-exchanged with the cooling water, and the air sucked through the auxiliary intake port 112, are the eliminator ( In a state in which moisture has been removed by 701, it will be selectively heated by the heating unit 610.

In more detail, the eliminator 701 includes two first parts 711 and one second part 721. The first parts 711 extend vertically, respectively, and are disposed to be spaced apart from each other in a horizontal direction. In addition, both ends of the second part 721 are connected to the lower end of the first part 711, respectively. For example, the first part 711 extends up and down obliquely at a preset angle, and the second part 721 extends in a horizontal direction so that both ends thereof are at the lower end of the first part 711. Each can be connected.

In addition, the present embodiment may further include a plurality of water collecting guides 800. The water collecting guide 800 is installed horizontally apart from each other in the interior of the casing 100 between the filler 400 and the water collecting part 500. Substantially, in the water collecting guide 800, a part of the cooling water heat-exchanged with air in the filler 400 is collected and transmitted to the water collecting part 500. In addition, cooling water heat-exchanged with air in the filler 400 and air sucked through the main intake port 111 may flow through the space between the collection guide 800. For example, the water collecting guide 800 may include a plurality of obliquely extending at a predetermined angle, and may be disposed to be spaced apart from each other in a horizontal direction.

Meanwhile, the present embodiment may further include an air guide 900 guiding the air sucked through the main intake port 111 into the casing 100. To this end, the air guide 900 may have one end adjacent to the main intake port 111 and the other end disposed inside the casing 100. In particular, when the main intake port 111 is formed only on one side of the casing 100 according to the surrounding environment, the casing 100 relatively spaced apart from the main intake port 111 by the air guide 900 ) Air may be guided into the interior.

Hereinafter, a configuration of a white smoke reduction cooling tower according to a second embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

2 is a longitudinal sectional view showing a cooling tower according to a second embodiment of the present invention. Among the constituent elements of the present embodiment, the same constituent elements as those of the first exemplary embodiment of the present invention are denoted by reference numerals in FIG. 1, and detailed descriptions thereof will be omitted.

Referring to FIG. 2, in the cooling tower 2 according to the present embodiment, the heating unit 610 is disposed so as to overlap at least a portion of the projection of the auxiliary intake port 112 in the vertical direction. In other words, the heating part 610 has its interior in the vertical direction, that is, the exhaust flow path () communicates with the exhaust port 120, and overlaps with a part of the auxiliary intake port 112 in the horizontal direction.

In addition, a part of the eliminator 702 is disposed to overlap the auxiliary intake port 112 in the horizontal direction. In more detail, the eliminator 702 includes two first parts 712 and one second part 722. The first parts 712 extend vertically, respectively, and are disposed to be spaced apart from each other in a horizontal direction. In addition, both ends of the second part 722 are connected to the lower end of the first part 712, respectively. For example, the first part 712 extends up and down obliquely at a preset angle, and the second part 722 extends in a horizontal direction so that both ends of the first part 712 are at the bottom of the first part 712. Each can be connected. Accordingly, at least a part of the first part 712 overlaps the auxiliary intake port 112 in a horizontal direction, and at least a part of the second part 722 overlaps the exhaust port 120 in a vertical direction. will be.

In addition, the present embodiment further includes a damper member 630 selectively opening and closing the auxiliary intake port 112. Particularly, in this embodiment, the auxiliary intake port 112 is opened only when the damper member 630 is shielded from the bottom surface of the heating part 610 by the opening/closing member 620. In other words, in this embodiment, opening and closing of the exhaust flow path 610S and the auxiliary intake port 112 by the opening/closing member 620 and the damper member 630 are alternately performed. Substantially, when there is a concern about the occurrence of white smoke, such as in winter, the opening/closing member 620 shields the exhaust flow path 610S, and the damper member 630 opens the auxiliary intake port 112. In other cases, the opening/closing member 620 opens the exhaust flow path 610S, and the damper member 630 shields the auxiliary intake port 112. In addition, substantially, the heating unit 610 can also operate only when the exhaust passage 610S is shielded by the opening/closing member 620.

Hereinafter, the operation of the cooling tower according to the second embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

3 and 4 are operational state diagrams showing the flow of air and cooling water in the white smoke reduction cooling tower according to an embodiment of the present invention.

First, referring to FIG. 3, in this embodiment, when the blower 300 operates and the blower fan 210 rotates substantially, air is sucked into the casing 100 through the main intake port 111. . As described above, the air sucked into the casing 100 flows along the filler 400 and contacts the water supply 200 and the cooling water sprayed from the water supply nozzle 220 and exchanges heat. ) Is discharged to the outside of the casing 100.

And, when there is a concern about the generation of white smoke, for example, in a winter season or the like, in a state in which the opening/closing member 620 shields the exhaust flow path 610S, and the damper member 630 opens the auxiliary intake port 112, The blower 200 operates. Accordingly, air is sucked into the casing 100 through the main intake port 111 and the auxiliary intake port 112 by the operation of the blower 200.

However, as described above, since the exhaust passage 610S is in a shielded state, the air sucked through the main intake port 111 and heat-exchanged with the cooling water and the air sucked through the auxiliary intake port 112 are substantially In the mixed state, it is heated while passing through the heating unit 610 and then discharged to the outside through the exhaust port 120. Accordingly, generation of white smoke may be reduced by a decrease in relative humidity according to an increase in temperature of the air discharged through the exhaust port 120.

In addition, in this embodiment, the air sucked through the main intake port 111 and heat-exchanged with the cooling water and the air sucked through the auxiliary intake port 112 are heated by the heating unit 610 before the eliminator. Pass 701. The air that is sucked in through the main intake port 111 by the eliminator 701 and heat-exchanged with the coolant and moisture in the air sucked through the auxiliary intake port 112 will be removed.

On the other hand, when there is no concern about the generation of white smoke, for example, in summer, the opening/closing member 620 opens the exhaust passage 610S, and the damper member 630 opens the auxiliary intake port 112. In the shielded state, the blower 300 operates. Accordingly, air is sucked into the casing 100 through the main intake port 111 by the operation of the air blower 200. In addition, since the exhaust flow path 610S is open, the air sucked through the main intake port 111 and heat-exchanged with the cooling water flows through the exhaust flow path 610S in a vertical direction to the outside through the exhaust port 120. Is discharged as. Of course, before flowing through the exhaust flow path 610S, moisture in the air that has been sucked through the main intake port 111 by the eliminator 701 and heat-exchanged with the cooling water will be removed.

That is, in the embodiment of the present invention, when there is a concern about generation of white smoke, the air discharged through the exhaust port 120 is heated while passing through the heating unit 610, thereby reducing the generation of white smoke and the generation of white smoke. When this is not a concern, air is discharged through the exhaust port 120 by flowing the exhaust passage 610S in a vertical direction. Accordingly, according to the exemplary embodiment of the present invention, the generation of white smoke can be reduced and a phenomenon in which air flow is unnecessarily interfered can be prevented.

In addition, in the embodiment of the present invention, substantially, at least a portion of the auxiliary intake port 112 and the eliminator 701 overlap in the horizontal direction. Therefore, according to the embodiment of the present invention, the height of the casing 100 may be relatively reduced compared to the prior art in which the auxiliary intake port 112 and the eliminator 701 are disposed to be spaced apart in a vertical direction. .

Within the scope of the basic technical idea of the present invention, many other modifications are possible for those of ordinary skill in the art, as well as the scope of the present invention should be interpreted based on the appended claims. .

100: casing 111: main intake port
112: auxiliary intake port 120: exhaust port
200: water supply unit 300: air blower
400: filler 500: collection tank
610: heating part 610S: exhaust flow path
620: opening and closing member 630: damper member
701, 702: Eliminator 800: Collection Guide
900: air guide

Claims (8)

A casing 100 in which a main intake port 111 through which air is sucked is formed on a side surface and an exhaust port 120 through which air is discharged is formed on an upper surface;
A water supply unit 200 installed inside the casing 100 and supplying cooling water;
A blower 300 configured to form a flow of air flowing in and out of the casing 100 through the main intake port 111 and the exhaust port 120;
A filler 400 that is installed inside the casing 100 and performs heat exchange between the air sucked through the main intake port 111 by the air blower 300 and the cooling water supplied from the water supply unit 200 ;
A collection unit 500 installed inside the casing 100 and collecting coolant heat exchanged with air in the filler 400;
Eliminators 701 and 702 for removing moisture in the air discharged to the outside through the exhaust port 120; And
A heating unit 610 installed inside the casing 100 and selectively heating air discharged to the outside through the exhaust port 120 after moisture is removed by the eliminators 701 and 702 ; Including,
At least a part of the eliminators 701 and 702 extends vertically, and the other part of the eliminators 701 and 702 extends in the horizontal direction,
The air discharged to the outside through the exhaust port 120 is selectively heated by the heating unit 610 in a state in which moisture is removed by the eliminators 701 and 702.
delete The method of claim 1,
The eliminators 701 and 702 are formed to have a longitudinal section of a'┗┛' shape, and the space in which the exhaust port 120 and the heating unit 610 are located and the rest of the casing 100 White smoke reduction cooling tower disposed on the upper portion of the casing 100 so as to partition into space.
The method of claim 1,
In the casing 100, an auxiliary intake port 112 through which air is sucked is formed on a side surface corresponding to the upper side of the main intake port 111,
A portion of the eliminator 702 extending in the vertical direction is disposed to overlap the auxiliary intake port 112 in a horizontal direction.
A casing 100 in which a main intake port 111 through which air is sucked is formed on a side surface and an exhaust port 120 through which air is discharged is formed on an upper surface;
A water supply unit 200 installed inside the casing 100 and supplying cooling water;
A blower 300 configured to form a flow of air flowing in and out of the casing 100 through the main intake port 111 and the exhaust port 120;
A filler 400 that is installed inside the casing 100 and performs heat exchange between the air sucked through the main intake port 111 by the air blower 300 and the cooling water supplied from the water supply unit 200 ;
A collection unit 500 installed inside the casing 100 and collecting coolant heat exchanged with air in the filler 400; And
Eliminators 701 and 702 for removing moisture in the air discharged to the outside through the exhaust port 120; Including,
The eliminators 701 and 702 are,
Two first parts 711 and 712 that extend vertically and are disposed to be spaced apart from each other in a horizontal direction; And
Second parts 721 and 722 having both ends connected to the lower ends of the first parts 711 and 712, respectively; White smoke reduction cooling tower comprising a.
The method of claim 5,
In the casing 100, an auxiliary intake port 112 through which air is sucked is formed on a side surface corresponding to the upper side of the main intake port 111,
At least a portion of the first part 712 overlaps the auxiliary intake port 112 in a horizontal direction.
The method of claim 5,
At least a portion of the second part (721) (722) is a white smoke reduction cooling tower overlapping the exhaust port (120) in a vertical direction.
The method of claim 5,
It is installed inside the casing 100 surrounded by the exhaust port 120 and the first part 711, 712, and the second part 721, 722, and by the eliminator 701. After the moisture is removed, the white smoke reduction cooling tower further comprises a heating unit 610 for selectively heating the air discharged to the outside through the exhaust port 120.

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