KR20220104938A - Odor removal device - Google Patents

Abstract

The present invention provides an odor removal device capable of effectively removing odorous substances of various natures without using harmful chemicals. The odor removal device according to the present invention comprises: a housing having an accommodation space at the inside; an intake duct penetrating a side surface of the housing and introducing air containing odorous substances into the accommodation space; a packing layer provided above the intake duct in the accommodation space and removing the odorous substances in the air; and a discharge duct provided on an upper part of the packing layer and penetrating the housing to discharge air, from which odor substances have been removed, to the outside. The packing layer comprises: a spray nozzle spraying water downward; a plurality of deodorization blocks provided at a lower part of the spray nozzle to increase a contact area between air and water; and a block bed supporting the deodorization blocks and having a plurality of through holes formed to allow water to escape downward. In addition, each of the deodorization blocks has a three-dimensional body with a plurality of pores on a surface thereof and a hollow penetrating the body.

Description

Odor removal device {ODOR REMOVAL DEVICE}

The present invention relates to a malodor removal device. More specifically, the present invention relates to a malodor removal device capable of effectively removing odor substances of various properties without using harmful chemicals using a plasma generator and a hollow deodorizing block.

Waste gases contaminated with odors and volatile organic compounds (VOCs) from various industrial facilities and environmental infrastructure are discharged into the atmosphere, causing serious environmental pollution. In particular, representative odor substances include methane, ammonia, hydrogen sulfide, and the like, which are becoming more serious social problems because they are greenhouse gases that cause global warming.

Accordingly, a lot of scrubbers are used in odor-emitting workplaces to remove odorous substances including greenhouse gases. A scrubber is a device that collects solid or liquid particles suspended in a gas using a liquid. The liquid is sprayed through a spray nozzle, and while the liquid falls from the top to the bottom, it comes into contact with the gas rising from the bottom to the gas-liquid. It is a representative pollution prevention facility that removes gas by contact.

1 shows a conventional general wet scrubber using water. As shown in FIG. 1 , the polluted air introduced into the lower part of the wet scrubber 10 comes into contact with water while rising in the wet scrubber 10 , and odor components are removed in this process.

More specifically, a packing layer 12 filled with a pall ring 11 is provided inside the wet scrubber 10 , and a spray nozzle 13 for spraying water is provided on the packing layer 12 . That is, the rising air is mixed with water in the packing layer 12, and in this process, odor components in the air can be removed. The pawling 11 is a configuration for increasing the mixing degree of air and water, and the structure shown in FIG. 2 is generally used.

However, the conventional pauling 11 has a disadvantage in that the effect of increasing the mixing degree of air and water is insignificant, and thus the effect of removing odors is not large. In addition, the wet scrubber 10 has a problem in that, although hydrophilic odor substances can be removed, hydrophobic odor substances such as methane cannot be removed.

In order to solve this problem, the chemical cleaning scrubber 20 shown in FIG. 3 has been proposed. The chemical cleaning scrubber 20 was developed to improve the removal rate of odor substances, and is characterized by using two or more chemical solutions having different properties. For example, an acidic chemical is sprayed onto the first packing layer 21 to remove alkaline odor substances, and then, an alkaline chemical is sprayed onto the second packing layer 23 to remove acidic odor substances.

However, this chemical cleaning scrubber 20 has a problem in that a large amount of contaminated wastewater is generated because it uses chemicals harmful to the human body.

Accordingly, there is a need to develop an odor removal device capable of effectively removing odor substances having various properties without using harmful chemicals.

An object of the present invention is to provide a malodor removal device capable of effectively removing odor substances having various properties without using harmful chemicals.

However, the problems to be solved by the present invention are not limited to the above problems, and may be variously expanded within the scope without departing from the spirit and scope of the present invention.

In order to achieve the above object of the present invention, an odor removal device according to exemplary embodiments includes a housing having an accommodating space therein; a suction duct passing through the side surface of the housing to introduce air containing odor substances into the accommodation space; a packing layer provided above the suction duct in the accommodating space to remove odorous substances in the air; and an exhaust duct provided on the packing layer and for discharging air from which odor substances have been removed through the housing to the outside.

At this time, the packing layer, a spray nozzle for spraying water downward, a plurality of deodorizing blocks provided under the spray nozzle to increase the contact area of air and water, and supporting the deodorizing blocks, but the water is drained downward It may include a block bed in which a plurality of through-holes are formed so as to be exited. In addition, each of the deodorizing blocks may have a three-dimensional body having a plurality of pores on the surface, and a hollow penetrating the body.

Meanwhile, the body may have any one of a spherical shape and a polyhedral shape.

In addition, if necessary, a plurality of hollows may be provided in the deodorizing block.

Water falling from the packing layer may be stored in the lower portion of the accommodation space, and the water stored in the lower portion of the accommodation space may be supplied to the spray nozzle by a spray pump.

In one embodiment, a plurality of packing layers may be stacked up and down inside the housing.

In one embodiment, the block bed may include a plate-shaped bed supporting the deodorizing blocks, a plurality of through holes penetrating the bed, and a plurality of protruding pins protruding upward from the bed. .

In an embodiment, the odor removal device may further include a demister disposed between the packing layer and the discharge duct to selectively collect moisture.

An apparatus for removing odors according to still other exemplary embodiments of the present invention includes: a suction duct through which air containing odor substances is introduced; a plasma generator connected to the rear end of the suction duct and generating plasma to generate active oxygen species; a packing layer connected to the rear end of the plasma generator and spraying water to remove odorous substances in the air; and an exhaust duct for discharging the air passing through the packing layer to the outside.

At this time, the air moves upward in the packing layer. In addition, the packing layer, a spray nozzle for spraying water downward, a plurality of deodorizing blocks provided under the spray nozzle to increase the contact area of air and water, and supporting the deodorizing blocks, but water escapes downward It may include a block bed having a plurality of through-holes formed therein. And, each of the deodorizing blocks may have a three-dimensional body having a plurality of pores on the surface, and a hollow penetrating the body.

Meanwhile, the body may have any one of a spherical shape or a polyhedral shape, and a plurality of hollows may be provided in the body.

In addition, the block bed may include a plate-shaped bed supporting the deodorizing blocks, a plurality of through holes penetrating the bed, and a plurality of protruding pins protruding upward from the bed.

On the other hand, the odor removal device may further include a spray pump for supplying the water dropped from the packing layer to the spray nozzle.

The malodor removal device according to the exemplary embodiments of the present invention can maximize the contact of air and water by using the deodorizing blocks having numerous pores and form a hollow penetrating the deodorizing block to facilitate the flow of air. Accordingly, it is possible to maximize the removal performance of the malodorous substances.

In addition, the block bed supporting the deodorizing block has through-holes that function as air circulation and water draining passages. In the odor removal device according to exemplary embodiments of the present invention, a protruding pin protruding upwardly on the block bed is formed. By doing so, it is possible to prevent the deodorizing block from blocking the through hole. Accordingly, it is possible to maintain the flow of air and to drain water smoothly, and it is possible to maximize the removal performance of odor substances.

In addition, the malodor removal apparatus according to the exemplary embodiments of the present invention may further include a plasma generator as a pre-treatment device, wherein the plasma generator increases the reactivity of the hydrophilic malodorous material and converts the hydrophobic malodorous material into a hydrophilic material. have. Accordingly, most odorous substances are hydrophilic, and various types of odorous substances can be easily removed even if only water is used as the washing water.

1 is a view showing a conventional wet scrubber.
FIG. 2 is a diagram illustrating the polling of FIG. 1 .
3 is a view showing a conventional chemical cleaning type scrubber.
4 is a view showing a malodor removal device according to a first embodiment of the present invention.
5 is a perspective view showing the deodorizing block of FIG.
6 is a view showing a malodor removal device according to a second embodiment of the present invention.
7 is a view showing a malodor removal device according to a third embodiment of the present invention.

With respect to the embodiments of the present invention disclosed in the text, specific structural or functional descriptions are only exemplified for the purpose of describing the embodiments of the present invention, and the embodiments of the present invention may be embodied in various forms. It should not be construed as being limited to the embodiments described in .

Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle. Other expressions describing the relationship between elements, such as "between" and "immediately between" or "neighboring to" and "directly adjacent to", etc., should be interpreted similarly.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate that the specified feature, number, step, operation, component, part, or a combination thereof exists, but one or more other features or numbers , it is to be understood that it does not preclude the possibility of the presence or addition of steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with the context of the related art, and unless explicitly defined in the present application, they are not to be interpreted in an ideal or excessively formal meaning. .

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and repeated descriptions of the same components are omitted.

First, a malodor removal apparatus according to a first embodiment of the present invention will be described with reference to FIGS. 4 and 5 . 4 is a view showing an odor removal device according to a first embodiment of the present invention, and FIG. 5 is a perspective view showing the deodorizing block of FIG. 4 .

4 and 5 , the malodor removal device 100 includes a housing 110 forming an outer shape, and a first packing layer 120 and a second packing layer 130 provided inside the housing to remove odor substances in the air. ), a spray pump 140 for supplying washing water to the packing layers 120 and 130, a demister 150 for removing moisture from the air that has passed through the packing layers 120 and 130, and odor substances. and a drain pump 160 for discharging the contaminated water to the outside.

In this case, the washing water may be water, water containing a chemical solution, a chemical solution, or the like. However, for convenience of explanation, only the case where water is used as washing water will be described below.

The housing 110 is a configuration constituting the external shape of the odor removal device 100 and may have a cylindrical shape, a polygonal column shape, or the like. An accommodating space 115 is formed inside the housing 110 , and components for removing odor substances such as the packing layers 120 and 130 and the demister 150 may be accommodated in the accommodating space 115 . In addition, water that has fallen from the packing layers 120 and 130 may be accommodated in the lower portion of the accommodating space 115 .

Specifically, as shown in FIG. 4 , water is stored in the lowermost portion of the receiving space 115 , and the first packing layer 120 , the second packing layer 130 , and the demister 150 are sequentially thereon. can be placed as In addition, a suction duct 111 through which polluted air is introduced from the outside is provided at the lower portion of the first packing layer 120 , and an exhaust duct 113 for discharging the purified air to the outside is provided at the upper portion of the demister 150 . can be That is, the contaminated air may be introduced into the housing 110 through the suction duct 111 , and may be purified while passing through the packing layers 120 and 130 and then discharged to the outside through the discharge duct 113 .

The first packing layer 120 is provided at a position higher than the suction duct 111, and can remove odor substances contained in the air.

The first packing layer 120 includes a first spray nozzle 121 for spraying water, a plurality of first deodorizing blocks 123 for increasing a contact area between sprayed water and air, and first deodorizing blocks 123 . ) may include a first block bed 125 supporting the.

The first spray nozzle 121 receives water from the spray pump 140 , and may spray water toward the first deodorizing blocks 123 . Considering the effect of gravity, the first spray nozzle 121 is preferably located above the first deodorizing blocks 123, and a plurality of them may be provided as needed.

At this time, the spray pump 140 supplies the water stored in the accommodation space 115 of the housing 110 to the first spray nozzle 121 . That is, it is not necessary to continuously supply water from the outside, and it is possible to continuously remove odors by circulating water. Thereafter, the contaminated water may be discharged to the outside using the discharge pump 160 .

The first deodorizing block 123 has a sphere shape or a polyhedron shape, and increases the contact area between the water and air sprayed from the first spray nozzle 121 to improve the collection rate of odorous substances. have.

An embodiment of the first deodorizing block 123 is shown in FIG. 5 . As shown in FIG. 5 , the first deodorizing block 123 may have a hexahedral body 1231 having a plurality of pores 1233 , and a hollow 1235 penetrating the body 1231 .

The pores 1233 may be uniformly formed throughout the body 1231 . For example, a material having a large amount of pores 1233 is produced by adding a foaming agent to synthetic resin or rubber, etc., and cut to an appropriate size to form a porous body 1231 having a large porosity. can

The pores 1233 may store water sprayed from the first spray nozzle 125 . Accordingly, the presence of numerous pores 1233 may greatly increase the contact area and contact probability between air and water, and as a result, the malodor removal effect of the odor removal apparatus 100 may be improved.

The hollow 1235 is formed to penetrate the body 1231, and the size or number of the hollows may be appropriately changed as needed. For example, as shown in FIG. 5 , three hollows 1235 penetrating through each surface of the hexahedral body 1231 may be provided. Alternatively, only one hollow 1235 may be formed in the hexahedral body 1231 , or two hollow 1235 may be formed on each side to provide a total of six hollows 1235 .

The polluted air introduced into the housing 110 through the suction duct 111 rises toward the exhaust duct 113 and is purified while being mixed with water in the first packing layer 120 . However, since the first packing layer 120 is filled with a number of deodorizing blocks 123 , the deodorizing blocks 123 interfere with the flow of air, thereby reducing the odor removal effect.

In order to solve this problem, in the present invention, a hollow 1235 is formed in the deodorizing block 123 . In this case, since the rising air may flow through the hollow 1235 , the flow of air in the first packing layer 120 may be smooth. In addition, since the possibility that the air comes into contact with water while passing through the hollow 1235 inside the body 1231 is increased, the removal performance of odorous substances may also be greatly improved.

On the other hand, although it is shown in FIG. 5 that the first deodorizing block 123 has a hexahedral shape, the present invention is not limited thereto, and the first deodorizing block 123 may have various shapes. For example, the first deodorizing block 123 may have a sphere shape or any one of various polyhedral shapes such as a hexahedron, an octahedron, and a decahedron.

The first deodorizing blocks 123 may be supported by the first block bed 125 . The first block bed 125 may include a plate-shaped bed 1251 and a plurality of through-holes 1253 penetrating the bed 1251 . That is, the bed 1251 supports the first deodorizing block 123 , but the water in which the odor material is collected may fall downward through the through holes 1253 .

Meanwhile, only one packing layer may be provided inside the housing 110 , but a plurality of packing layers may be provided in order to improve the effect of removing odor substances. 4 shows an embodiment having two packing layers.

The second packing layer 130 is provided on the first packing layer 120, a second spray nozzle 131 for spraying water, a plurality of second deodorizing blocks that increase the contact area of the sprayed water and air 133 , and a second block bed 135 supporting the second deodorizing blocks 133 . At this time, the structure of each of the second spray nozzle 131 , the second deodorization block 133 and the second block bed 135 is the first spray nozzle 121 , the first deodorization block 123 and the first It may be substantially the same as or similar to the block bed 125 . Therefore, a redundant description thereof will be omitted.

A demister 150 for removing moisture may be provided on the second packing layer 130 .

Most of the water sprayed from the spray nozzles 121 and 131 falls downward, but fine droplets may rise together with the air. The configuration for selectively collecting these microdroplets is the demister 150 . The demister 150 may be, for example, a filter in which a fibrous object is overlapped in a net shape, and a plurality of demisters may be provided or may be omitted.

Air from which odor substances and moisture are removed may be discharged to the outside of the housing 110 through the exhaust duct 113 provided at the top.

As described above, the odor removal device 100 according to the present invention maximizes the contact between air and water by using the deodorizing block 123 in which numerous pores 1233 are formed, and a hollow ( 1235) to facilitate the flow of air. Accordingly, it is possible to maximize the removal performance of the malodorous substances.

Hereinafter, the malodor removal apparatus 101 according to the second embodiment of the present invention will be described with reference to FIG. 6 .

The malodor removal apparatus 100 of FIG. 6 is substantially the same as or similar to the malodor removal apparatus 100 described with reference to FIGS. 4 and 5 except for the shape of the block beds 125 and 135 . Therefore, only the above differences will be described, and duplicate descriptions of the same components will be omitted.

First, referring back to FIG. 4 , the plurality of first deodorizing blocks 123 may be supported by the first block bed 125 , and water may be supplied through the through holes 1253 formed in the first block bed 125 . falls downward through the

However, as shown in FIG. 4 , when the first deodorizing block 123 has a polyhedral shape, one surface of the first deodorizing block 123 may contact the first block bed 125 to block the through-hole 1253 . have. In this case, the air rise and the water drain through the through hole 1253 may not be smooth, and the odor removal effect may be reduced.

In order to compensate for this problem, in the present invention, a protruding pin 1255 is additionally formed on the first block bed 125 . The protruding pin 1255 can prevent the through-hole 1253 from being blocked by separating the first deodorizing block 123 from the first block bed 125 .

Specifically, as shown in FIG. 6 , the first block bed 125 has a plate-shaped bed 1251 , a plurality of through-holes 1253 penetrating the bed 1251 , and the bed 1251 . ) may include a plurality of protruding pins 1255 protruding upward. The protruding pin 1255 is provided at a position adjacent to the through hole 1253 , and the plurality of protruding pins 1255 may have the same length or different lengths from each other.

In addition, although not shown, a plurality of protruding pins may also be provided in the second block bed 135 .

As described above, in the malodor removal device 101 according to the second embodiment of the present invention, the protruding pins 1255 protruding upwardly on the block beds 125 and 135 are formed to block the through-holes 1253. can be prevented Accordingly, it is possible to maintain the flow of air and to drain water smoothly, and it is possible to maximize the removal performance of odor substances.

Hereinafter, the malodor removal device 102 according to the third embodiment of the present invention will be described with reference to FIG. 7 .

The malodor removal apparatus 102 of FIG. 7 is substantially the same as or similar to the malodor removal apparatus 100 described with reference to FIGS. 4 and 5 , except that it further includes a plasma generator 170 . Therefore, only the above differences will be described, and duplicate descriptions of the same components will be omitted.

The malodor removal device 100 shown in FIG. 4 can greatly improve the possibility of contact between the air and the washing water. However, when water is used as the washing water, most of the hydrophilic odor substances can be removed, but the removal of the hydrophobic odor substances may be insufficient.

In order to compensate for this problem, a plasma generator 170 is additionally installed in the present invention. The plasma generator 170 may improve the decomposition of the hydrophilic material, and convert the hydrophobic material into the hydrophilic, thereby greatly improving the odor removal performance. Therefore, even when water is used as the washing water, various odor substances can be easily removed.

More specifically, as shown in FIG. 7 , the malodor removal device 102 according to the third embodiment of the present invention includes a housing 110 forming an external shape, and is provided inside the housing to remove odor substances in the air. The first packing layer 120 and the second packing layer 130, the spray pump 140 for supplying water to the packing layers 120 and 130, and moisture from the air passing through the packing layers 120 and 130 It may include a demister 150 to remove, a drainage pump 160 for discharging contaminated water containing odor substances to the outside, and a plasma generator 170 for generating plasma.

In this case, when viewed based on the flow direction of the air, the plasma generator 170 should be installed upstream of the packing layers 120 and 130 . That is, the contaminated air is first supplied to the plasma generator 170 through the suction duct 111 , and the air that has passed through the plasma generator 170 is supplied to the packing layers 120 and 130 through the connection duct 117 . can be

Meanwhile, although an example in which the plasma generator 170 is installed outside the housing 110 is illustrated in FIG. 7 , the present invention is not limited thereto. That is, it is sufficient if the plasma generator 170 is installed upstream of the packing layers 120 and 130 , and if necessary, the plasma generator 170 may be installed inside the housing 110 . For example, the plasma generator 170 may be provided between the suction duct 111 and the first packing layer 120 in FIG. 4 .

The plasma generator 170 is a device for generating low-temperature plasma at atmospheric pressure, and may be, for example, a dielectric barrier discharge (DBD) type plasma generator. In this case, the plasma generator 170 generates a large amount of reactive oxygen species (ROS), and the reactive oxygen species may react with odor substances.

Specifically, hydrophilic odor substances such as ammonia and hydrogen sulfide may react with active oxygen species to increase decomposition. This reaction process is disclosed in Formula 1. In Chemical Formula 1, ammonia with low reactivity was converted into nitrogen dioxide with high reactivity.

[Formula 1]

Next, hydrophobic odor substances such as methane may be converted into hydrophilic by reacting with active oxygen species. This reaction process is disclosed in Chemical Formula 2. In Chemical Formula 2, methane, which is a hydrophobic material, is converted into carbon dioxide, which is a hydrophilic material.

[Formula 2]

As described above, the reactivity of the hydrophilic malodorous material in the plasma generator 170 may be further increased, and the hydrophobic malodorous material may be converted into a hydrophilic material. That is, after passing through the plasma generator 170 , most of the odor substances become hydrophilic and the reactivity with water is greatly increased. Accordingly, the effect of removing odors from the packing layers 120 and 130 may be further improved. In addition, since various odor substances can be removed using only water, there is an advantage in that there is no need to use chemicals harmful to the human body.

In addition, the plasma generator 170 has an effect of removing greenhouse gases such as methane and nitrous oxide.

For example, methane, a representative odorous substance, is a very serious global warming substance with a Global Warming Potential (GWP) of 21. Here, the global warming potential (GWP) is a measure of the effect of greenhouse gases on global warming, and represents a relative value based on carbon dioxide. However, since methane is hydrophobic, there is a problem in that it is difficult to remove it with only a general wet scrubber. However, since the odor removal device 102 according to the present invention can convert methane into hydrophilic carbon dioxide in the plasma generator 170 (refer to Formula 2), it is possible to easily remove methane using only water.

In addition, nitrous oxide (N ₂ O), which is one of the greenhouse gases, is a serious global warming material having a global warming potential (GWP) of 310, and may be removed from the plasma generator 170 . This process is disclosed in Formula 3 below.

[Formula 3]

That is, nitrous oxide (N ₂ O) is converted into highly reactive nitrous oxide (NO ₂ ) in the process of passing through the plasma generator 170 , and the converted nitrous oxide (NO ₂ ) is the packing layers 120 and 130 . can be collected in

Although the above has been described with reference to the embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. You will understand that you can.

10: wet scrubber 20: chemical cleaning scrubber
100, 101, 102: odor removal device
110: housing 120: first packing layer
130: second packing layer 140: spray pump
150: demister 160: exhaust pump
170: plasma generator

Claims (10)

a housing having an accommodating space therein;
a suction duct passing through the side surface of the housing to introduce air containing odor substances into the accommodation space;
a packing layer provided above the suction duct in the accommodating space to remove odorous substances in the air; and
It is provided on the packing layer and includes an exhaust duct for discharging air from which odor substances have been removed through the housing to the outside,
The packing layer is
a spray nozzle for spraying water downward;
a plurality of deodorizing blocks provided under the spray nozzle to increase a contact area between air and water; and
It supports the deodorizing blocks, but includes a block bed having a plurality of through-holes formed so that water can escape downwards,
Each of the deodorizing blocks,
a three-dimensional body having a plurality of pores on its surface; and
A malodor removal device, characterized in that it has a hollow penetrating the body. [Claim 2] The malodor removal device according to claim 1, wherein the body has any one of a spherical shape and a polyhedral shape. According to claim 1, wherein the deodorizing block malodor removal device, characterized in that provided with a plurality of the hollow. According to claim 1, wherein the water falling from the packing layer is stored in the lower portion of the accommodation space, and the water stored in the lower portion of the accommodation space is supplied to the spray nozzle by a spray pump. The apparatus of claim 1, wherein a plurality of packing layers are vertically stacked inside the housing. According to claim 1, wherein the block bed,
a plate-shaped bed supporting the deodorizing blocks;
a plurality of through-holes passing through the bed; and
A malodor removal device comprising a plurality of protruding pins protruding upward from the bed. [Claim 2] The malodor removal device according to claim 1, further comprising a demister disposed between the packing layer and the discharge duct to selectively collect moisture. a suction duct through which air containing odorous substances is introduced;
a plasma generator connected to the rear end of the suction duct and generating plasma to generate active oxygen species;
a packing layer connected to the rear end of the plasma generator and spraying water to remove odorous substances in the air; and
Including an exhaust duct for discharging the air that has passed through the packing layer to the outside,
Air moves upward in the packing layer,
The packing layer is
a spray nozzle for spraying water downward;
a plurality of deodorizing blocks provided under the spray nozzle to increase a contact area between air and water; and
It supports the deodorizing blocks, but includes a block bed having a plurality of through-holes formed so that water can escape downwards,
Each of the deodorizing blocks,
a three-dimensional body having a plurality of pores on its surface; and
A malodor removal device, characterized in that it has a hollow penetrating the body. 9. The method of claim 8,
The body is any one of a spherical shape, a polyhedral shape,
The hollow odor removal device, characterized in that provided in a plurality of the body. The method of claim 8, wherein the block bed,
a plate-shaped bed supporting the deodorizing blocks;
a plurality of through-holes passing through the bed; and
A malodor removal device comprising a plurality of protruding pins protruding upward from the bed.

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