Wet air purification apparatus

Abstract

According to the present invention, a wet air purification device is provided comprising: a housing having a tubular structure in which a cleaning fluid is stored in an internal receiving space; a contaminated air inlet formed on one side of the housing to allow external contaminated air to flow into the housing; an air outlet formed on the other side of the housing to allow air purified by the cleaning fluid to be discharged to the outside of the housing; an exhaust fan provided at the air outlet to create negative pressure inside the housing; and a plurality of flow paths arranged inside the housing to induce contaminated air to be repeatedly immersed in the cleaning fluid and then move back to the top of the cleaning fluid during the process of moving from one side of the housing to the other side.

Description

Technology Field

[0001] The present invention relates to a wet air purification device, and more specifically, to a wet air purification device in which contaminated air is repeatedly immersed along a plurality of immersion channels configured in a body, bubbled up, and dispersed into microbubbles through a plurality of perforated plates, thereby increasing the contact area and residence time with a cleaning fluid and enabling effective removal of contaminants in the air. Background Technology

[0002] With the recent increase in social demand for the recycling of construction waste and resource circulation, the industry producing recycled aggregates by recycling waste concrete, waste asphalt, and various construction by-products is expanding.

[0003] Generally, the production process of recycled aggregates involves multiple steps of crushing, grinding, sorting, and transporting construction waste, and these processes generate large amounts of dust and fine particles.

[0004] In particular, dust generated from crushers, sorters, conveyors, and storage hoppers spreads into the workplace and surrounding environment, posing a problem that not only impairs the respiratory health of workers but also causes contamination of equipment and deterioration of air quality in the surrounding area.

[0005] Accordingly, dust collection equipment is installed at dust generation points in recycled aggregate production facilities to remove dust, but conventionally, filter-type dust collectors such as bag filters or cartridge filters are mainly used.

[0006] However, in environments where a large amount of dust is continuously introduced, filter-type dust collectors like the above have the problem of reduced dust collection efficiency and increased costs associated with filter replacement and maintenance due to frequent filter clogging.

[0007] In addition, dust generated during the production of construction waste or recycled aggregates often has varying particle sizes and high specific gravity, so it easily accumulates on the filter surface, which can lead to reduced operational efficiency and increased energy consumption.

[0008] To solve these problems, wet dust collection methods that use water to remove dust are being applied, but most conventional wet dust collectors simply pass air through water once or spray water, so the contact time between air and water is insufficient and there are limitations in the efficiency of removing fine dust.

[0009] In addition, if large bubbles form as air passes through water, the contact area between the air and the cleaning fluid decreases, leading to reduced cleaning efficiency; furthermore, if the flow path structure is inefficient, internal pressure loss increases, resulting in reduced airflow efficiency.

[0010] Therefore, there is a need to develop a new type of wet air purification device that can be applied to industrial sites where large amounts of dust are continuously generated, such as recycled aggregate production processes, and can improve dust removal efficiency by increasing the contact area and residence time between the contaminated air and the cleaning fluid, while simultaneously minimizing pressure loss. Prior art literature

[0011] (0001) Registered Patent 10-1913513(0002) Registered Patent 10-2634256(0003) Registered Patent 10-2191776(0004) Registered Patent 10-2292943 The problem to be solved

[0012] Therefore, the objective of the present invention is to provide a wet air purification device capable of effectively purifying contaminated air generated in industrial sites where a large amount of dust is continuously generated, such as in the recycled aggregate production process.

[0013] In addition, the objective of the present invention is to provide a wet air purification device capable of improving the removal efficiency of fine dust and suspended matter contained in the air by increasing the contact time and contact area between the air and the cleaning fluid through a plurality of immersion channels formed inside the body, thereby causing contaminated air to be repeatedly immersed and bubbled.

[0014] Meanwhile, the objectives of the present invention are not limited to those mentioned above, and other unmentioned objectives will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0015] According to the present invention, a wet air purification device is provided comprising: a housing having a tubular structure in which a cleaning fluid is stored in an internal receiving space; a contaminated air inlet formed on one side of the housing to allow external contaminated air to flow into the housing; an air outlet formed on the other side of the housing to allow air purified by the cleaning fluid to be discharged to the outside of the housing; an exhaust fan provided at the air outlet to create negative pressure inside the housing; and a plurality of flow paths arranged inside the housing to induce contaminated air to be repeatedly immersed in the cleaning fluid and then move back to the top of the cleaning fluid during the process of moving from one side of the housing to the other side.

[0016] Here, the wet air purification device preferably further includes a plurality of perforated plates spaced apart along the direction of flow of the cleaning fluid inside the housing and disperse contaminated air into microbubbles within the cleaning fluid to increase the contact area with the cleaning fluid.

[0017] Additionally, the Euro section preferably includes: a immersion guide plate that is formed to extend with a predetermined length from one side of the interior of the housing toward the other side and is positioned at a location lower than the surface of the cleaning fluid; a guide plate that extends downward from the ceiling surface of the interior of the housing toward the end of the immersion guide plate, forms a gap between it and the immersion guide plate, and induces a vortex of the cleaning fluid by concentrating the negative pressure formed by the exhaust fan in the gap; a vortex plate that is positioned at a predetermined distance from the guide plate and is formed in a curved shape to rotate the flow of the cleaning fluid induced through the gap, thereby forming a vortex within the cleaning fluid; a cover plate that is positioned at a distance above the vortex plate and converts the flow direction of bubbles and fluid rising by the vortex plate to a horizontal direction; a re-immersion guide plate that guides contaminated air that has moved along the cover plate back into the cleaning fluid to be re-immersed; and an exhaust guide plate that is positioned at a predetermined distance from the re-immersion guide plate and guides purified air that has passed through the space formed between it and the re-immersion guide plate toward the air outlet.

[0018] In addition, multiple perforated plates may be arranged at predetermined intervals along the flow direction of the cleaning fluid, and it is preferable that a plurality of through holes be formed in each perforated plate. Effects of the invention

[0019] Accordingly, according to the present invention, by causing contaminated air to be repeatedly immersed in and bubbled in a cleaning fluid along a plurality of immersed and non-immersed sections formed inside a body, the contact area and residence time between the contaminated air and the cleaning fluid are increased, thereby improving the removal efficiency of fine dust, suspended solids, and harmful dust.

[0020] In addition, purification performance can be further improved by maximizing gas-liquid contact efficiency through the dispersion of contaminated air into microbubbles by multiple perforated plates placed in the flooded section.

[0021] In addition, by adopting a wet structure that does not use a filter, problems such as filter clogging and replacement that occur in conventional filter-type dust collectors can be prevented, and by minimizing pressure loss through the zigzag structure and vortex-inducing structure of the flow path while improving airflow efficiency, it is possible to reduce maintenance costs and enable stable operation for a long time.

[0022] Meanwhile, the effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0023] FIG. 1 is a perspective view showing a wet air purification device according to a preferred embodiment of the present invention; FIG. 2 is a side cross-sectional view showing the wet air purification device of FIG. 1; Figures 3 to 5 are diagrams showing the process of purifying contaminated air by the wet air purification device of Figure 2. Specific details for implementing the invention

[0024] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0025] As illustrated in FIGS. 1 to 5, a wet air purification device (100) according to a preferred embodiment of the present invention comprises: a housing (110) having a tubular structure in which a cleaning fluid (W) is stored in an internal receiving space; a contaminated air inlet (120) formed on one side of the housing (110) to allow contaminated air from an external recycled aggregate production facility (200), more specifically a recycled aggregate residual particle wet dust collection facility, to flow into the housing (110); an air outlet (130) formed on the other side of the housing (110) to allow air purified by the cleaning fluid (W) to be discharged to the outside of the housing (110); an exhaust fan (140) provided at the air outlet (130) to form negative pressure inside the housing (110); and a plurality of fans arranged in a zigzag shape inside the housing (110) to repeatedly immerse in the cleaning fluid (W) and then return to the top of the cleaning fluid (W) as the contaminated air moves from one side of the housing (110) to the other side. It includes a plurality of perforated plates (160), etc., spaced apart along the flow direction of the cleaning fluid (W) inside the Euro section (150) and housing (110) that induce movement, and which disperse contaminated air into microbubbles within the cleaning fluid (W) to increase the contact area with the cleaning fluid (W).

[0026] The housing (110) is a tubular structure that forms the outer shape of the entire device and is configured to form a channel through which contaminated air moves and a receiving space in which a cleaning fluid (W) can be received.

[0027] In addition, the housing (110) may be formed from stainless steel, synthetic resin, reinforced plastic, or a composite material thereof, taking into account internal corrosion and durability, and may be manufactured in various shapes such as cylindrical, rectangular, or polygonal prism depending on the installation environment of the industrial site.

[0028] Here, the lower part of the housing (110) may be divided to form a storage section (111) in which a cleaning fluid (W) is stored, and the upper part of the housing (110) may be divided to form a gas movement section in which contaminated air or purified air moves as an upper space of the cleaning fluid (W).

[0029] Meanwhile, in the present invention, the term "submerged section" refers to a section in which contaminated air passes through the cleaning fluid (W) within the storage section (111) and is directly submerged in the cleaning fluid (W). Additionally, the term "non-submerged section" refers to a section in which contaminated air moves along the upper part of the cleaning fluid (W) within the gas movement section and is not directly submerged in the cleaning fluid (W).

[0030] The contaminated air inlet (120) is formed on one side of the housing (110) and serves as a passage through which external contaminated air flows into the housing (110), and can be connected by a duct to a crusher, sorter, conveyor, or dust generating equipment of the recycled aggregate production facility.

[0031] Here, the contaminated air inlet (120) may be formed in a circular, square, or expanded structure to uniformly control the flow rate of the incoming air, and may further be provided with a check valve or flow control damper to prevent backflow as needed.

[0032] The air outlet (130) is formed on the other side of the housing (110) and is a passage through which air purified by a cleaning fluid (W) is discharged to the outside. In order to reduce the humidity of the discharged air, a moisture separation section (not shown) may be further installed inside or at the front.

[0033] The exhaust fan (140) is a driving means installed in the air outlet (130) and forming negative pressure inside the housing (110) so that external contaminated air is forcibly drawn in through the contaminated air inlet (120).

[0034] Here, the exhaust fan (140) may be configured as either an axial fan or a centrifugal fan, and the rotational speed may be variably controlled according to the amount of dust to be processed or the required airflow.

[0035] The Euro section (150) is formed by a plurality of flow plates or partitions in the gas movement section inside the housing (110), that is, the non-submerged section, and is a means to extend the movement path while contaminated air moves along the gas movement section inside the housing (110), and includes a submerged guide plate (151), a guide plate (152), a vortex plate (153), a cover plate (154), a re-submerged guide plate (155), and an exhaust guide plate (156), etc.

[0036] The immersion guide plate (151) is formed to extend horizontally or in a gentle downward slope with a predetermined length from one side of the interior of the housing (110) toward the other side, and is positioned at a location lower than the water level of the cleaning fluid (W) to induce contaminated air entering through the contaminated air inlet (120) to be primarily immersed in the cleaning fluid (W).

[0037] That is, the flooding guide plate (151) blocks the direct straight flow of incoming contaminated air and forms a first flooding path that allows the contaminated air to pass through the cleaning fluid (W).

[0038] The guide plate (152) is formed to extend downward in an S-shape from the inner ceiling surface of the housing (110) toward the end of the flood guide plate (151), either vertically or slightly inclined.

[0039] Accordingly, the guide plate (152) forms an inlet chamber that receives contaminated air flowing in from the contaminated air inlet (120) together with the flooding guide plate (151), and a gap (G) is formed to provide a Venturi effect through the bent shape of the end of the flooding guide plate (151) and the bottom of the guide plate (152).

[0040] Here, the gap (G) provides an induction function that causes the cleaning fluid (W) to swirl when negative pressure is formed inside the housing (110) by the operation of the exhaust fan (140), thereby forcing contaminated air into the cleaning fluid (W).

[0041] The vortex plate (153) is spaced apart from the guide plate (152) by a predetermined distance and has a curved surface shape or a semicircular shape, and is arranged parallel so that the concave part faces the guide plate (152). It induces the cleaning fluid (W), which is swept by the exhaust fan (140), to move toward the guide plate (152), which is one side of the housing (110), by forming a vortex. Accordingly, the contaminated air immersed in the cleaning fluid (W) is dispersed into microbubbles by the vortex and rises.

[0042] The cover plate (154) is positioned at a predetermined distance above the vortex plate (153) and covers the vortex plate (153), thereby diverting the flow direction of the bubbles and fluid raised by the vortex plate (153) back to the other side of the housing (110), and accordingly, diverting the upward flow of the vortex plate (153) to a horizontal direction, extending the path of movement of the contaminated air and inducing it to be submerged back into the cleaning fluid (W).

[0043] The re-submersion guide plate (155) guides the contaminated air moved from the cover plate (154) downward so that it flows back into the cleaning fluid (W) as it moves toward the other side of the housing (110), thereby changing the direction of the flow of the contaminated air moving horizontally along the cover plate (154) downward so that the contaminated air is re-submerged into the cleaning fluid (W) in the storage unit (111), thereby forming a second submersion path.

[0044] Accordingly, additional cleaning can be performed as the contaminated air comes into contact with the cleaning fluid (W) again, and the removal efficiency of fine dust and suspended matter can be further improved through repeated immersion and bubble-forming processes.

[0045] The exhaust guide plate (156) guides the purification air rising from the cleaning fluid (W) after passing through the re-submersion guide plate (155) to move stably toward the air outlet (130), thereby aligning the flow so that the purification air in a bubble state rising from the cleaning fluid (W) is concentrated along the gas movement section toward the air outlet (130), and suppresses the generation of unnecessary backflow or vortices to improve exhaust efficiency.

[0046] Here, the re-immersion guide plate (155) and the exhaust guide plate (156) are spaced apart from each other by a predetermined distance, and an air buffer space may be formed between them. Air flowing into the air buffer space has its flow velocity temporarily reduced and its residence time increased, and accordingly, residual droplets or fine particles may fall back into the cleaning fluid (W). Some contaminated air within the air buffer space may be guided back into the cleaning fluid (W) by the negative pressure around the re-immersion guide plate (155) and re-immersed, and sufficiently purified air moves stably along the exhaust guide plate (156) toward the air outlet (130).

[0047] Meanwhile, in the present invention, at least one vane may be additionally disposed in the upper space of the cleaning fluid (W) inside the housing (110) to form a vortex in the flow of contaminated air, and the vane may rotate or disturb the flow direction of contaminated air moving along the cover plate (154) or air passing between the re-immersion guide plate (155) and the exhaust guide plate (156), thereby increasing the residence time of the air and increasing contact with fine droplets scattered from the cleaning fluid (W), thereby further improving the efficiency of collecting fine dust and residual contaminants.

[0048] In this way, the Euro section (150) can maximize the contact efficiency between the air and the cleaning fluid (W) by forming a multi-stage zigzag flow structure in which contaminated air is repeatedly immersed in the cleaning fluid (W) by a plurality of flow plates, bubbled, and then rises and moves again.

[0049] Meanwhile, the cleaning fluid (W) does not remain in a stagnant state in the storage section, but is sucked into the gap (G) between the immersion guide plate (151) and the guide plate (152) according to the negative pressure formed by the exhaust fan (140), and then moves sequentially along the vortex plate (153), guide plate (152), cover plate (154), and re-immersion guide plate (155). Accordingly, the cleaning fluid (W) forms a circulating flow inside the housing (110) and performs repetitive gas-liquid contact and vortex cleaning while intersecting with the movement path of the contaminated air.

[0050] A plurality of perforated plates (160) are spaced apart in the storage section, i.e., the submerged section, inside the housing (110) to disperse contaminated air into microbubbles within the cleaning fluid (W) and increase the contact area with the cleaning fluid (W). A plurality of perforated plates (160) may be arranged at predetermined intervals along the flow direction of the cleaning fluid (W), and each perforated plate (160) has a plurality of through holes (161) formed therein.

[0051] Here, the through hole (161) may be formed in one or more of the shapes of a circle, ellipse, polygon, or slot, and is configured to disperse large bubbles into a plurality of microbubbles as contaminated air passes through.

[0052] Accordingly, as the diameter of the bubbles in the contaminated air decreases within the cleaning fluid (W), the surface area increases, and the gas-liquid contact area with the cleaning fluid (W) increases, thereby improving the removal efficiency of fine dust, suspended solids, and harmful particles.

[0053] Additionally, multiple perforated plates (160) can be arranged in multiple stages in the vertical or horizontal direction within the flooded section, and accordingly, contaminated air can be repeatedly redistributed within the cleaning fluid (W) to enable multi-stage cleaning.

[0054] Here, when a plurality of perforated plates (160) are arranged in the vertical direction within the flooded section, it is more preferable to configure them so that they extend from the bottom of the vortex plate (153) and the re-flooded guide plate (155) to the bottom surface of the housing (110), thereby forming a multi-stage bubble dispersion area from one side to the other of the flooded section.

[0055] Additionally, a plurality of perforated plates (160) may be formed such that the diameter of the through hole (161) gradually decreases along the direction of the flow of contaminated air.

[0056] Accordingly, stepwise microbubble formation is possible within the cleaning fluid (W), which increases the contact time between the contaminated air and the cleaning fluid (W) and further improves the purification efficiency.

[0057] Meanwhile, the perforated plate (160) may be formed from a metal material, a synthetic resin material, or a porous ceramic material, and it is preferable to make it from a corrosion-resistant material to prevent corrosion caused by the cleaning fluid (W) and deformation due to long-term use.

[0058] Additionally, the perforated plate (160) can be detachably installed inside the housing (110), and thus configured to be easy to clean or replace.

[0059] In this way, the perforated plate (160) performs the role of improving purification performance by repeatedly microbubbling contaminated air within the cleaning fluid (W).

[0060] Meanwhile, in the present invention, the cleaning fluid (W) is a medium for removing fine dust, suspended solids, and harmful gases from contaminated air, and may basically include water, and may further include one or more additives to improve purification efficiency as needed.

[0061] Specifically, the cleaning fluid (W) may be pure water, groundwater, industrial water, or recycled water, and may include one or more of a surfactant, coagulant, defoamer, disinfectant, deodorizer, pH adjuster, oxidizer, or adsorbent as needed.

[0062] Here, surfactants can improve the wettability and dispersibility of pollutants to increase the efficiency of fine dust removal, and coagulants can improve sedimentation by coagulating fine particles.

[0063] In addition, deodorizers or oxidizers may be used to remove odors or harmful gases such as ammonia (NH₃), hydrogen sulfide (H₂S), and volatile organic compounds (VOCs), and may include, for example, sodium hypochlorite (NaOCl), hydrogen peroxide (H₂O₂), ozone water, or activated carbon slurry.

[0064] In addition, the cleaning fluid (W) can be adjusted to be acidic, neutral, or alkaline depending on the characteristics of the contaminant, for example, an alkaline solution (e.g., sodium hydroxide, sodium carbonate) can be used to remove acidic gases, and an acidic solution (e.g., citric acid, diluted sulfuric acid) can be used to remove basic gases.

[0065] Meanwhile, the cleaning fluid (W) can be used in a circulating manner and, if necessary, can be connected to a filtration device, sedimentation tank, chemical injection unit, or regeneration device to be reused repeatedly.

[0066] In addition, the present invention may further include an aeration device (not shown) installed at the bottom of the storage unit to inject air or oxygen into the cleaning fluid (W).

[0067] Here, an aeration device (not shown) can be configured to generate microbubbles inside the cleaning fluid (W) to induce circulation and stirring of the cleaning fluid (W), and to increase the gas-liquid contact area between the contaminated air and the cleaning fluid (W) to improve purification efficiency.

[0068] Accordingly, the stagnation of the cleaning fluid (W) can be prevented and the accumulation of sediment can be suppressed, and the performance of removing fine dust and harmful gases can be further improved by forming stronger turbulence in combination with the vortex formed by the flow path (150).

[0069] Hereinafter, the operation of the wet air purification device (100) according to a preferred embodiment of the present invention is described as follows.

[0070] First, when the exhaust fan (140) operates, negative pressure is formed inside the housing (110).

[0071] At this time, the negative pressure is locally concentrated in the gap (G) formed between the guide plate (152) and the immersion guide plate (151), and accordingly, the cleaning fluid (W) inside the chamber formed by the guide plate (152) and the immersion guide plate (151) is sucked out through the gap (G), forming a vortex-shaped flow.

[0072] That is, the cleaning fluid (W) forms a rotational flow around the gap (G) by the suction force generated by the exhaust fan (140), thereby creating a fluid inflow environment for contaminated air to be submerged.

[0073] Afterwards, the contaminated air from the outside, that is, the recycled aggregate production facility (200), is introduced into the housing (110) through the contaminated air inlet (120), and is forcibly submerged into the cleaning fluid (W) by being sucked downward by the local negative pressure formed in the gap (G) and the vortex flow of the cleaning fluid (W).

[0074] During this process, the contaminated air comes into direct contact with the cleaning fluid (W), and relatively large dust and foreign substances are removed first, and a first flooded section is formed.

[0075] Subsequently, contaminated air passing through the cleaning fluid (W) rotates due to an additional vortex flow formed by the vortex plate (153). At this time, the cleaning fluid (W) is not simply stationary within the storage unit, but forms a circulating flow that forms a rotational flow along the vortex plate (153) by the negative pressure from the exhaust fan (140), changes the direction of movement by the cover plate (154), and is again guided downward by the re-submersion guide plate (155). Accordingly, the cleaning fluid (W) itself circulates repeatedly and comes into multiple contact with the contaminated air, thereby further improving cleaning efficiency.

[0076] At the same time, contaminated air immersed in the cleaning fluid (W) is repeatedly microbubbled as it passes sequentially through a plurality of perforated plates (160) placed in the storage section, thereby further increasing the contact area and residence time with the cleaning fluid (W).

[0077] That is, while the contaminated air moves inside the housing (110), it repeatedly alternates between the non-submerged section and the submerged section, and multi-stage cleaning is performed during this process.

[0078] Finally, the air purified through repeated washing travels along the gas passage (112) and is discharged outside the housing (110) through the air outlet (130).

[0079] Accordingly, as described above, by using the negative pressure formed by the exhaust fan (140) to form a leading vortex of the cleaning fluid (W), and thereby causing the external contaminated air to be naturally forced into the cleaning fluid (W), the initial contact efficiency between the contaminated air and the cleaning fluid (W) can be improved.

[0080] In addition, by causing the contaminated air to repeatedly alternate between the flooded section and the non-flooded section while moving along the Euro section (150), the number of contacts with the cleaning fluid (W) and the residence time can be increased to achieve a multi-stage cleaning effect.

[0081] In particular, as contaminated air is repeatedly microbubbled by the perforated plates (160) arranged in multiple numbers in the storage section, the gas-liquid contact area with the cleaning fluid (W) is maximized, thereby significantly improving the efficiency of removing fine dust, suspended matter, and harmful dust.

[0082] In addition, unlike conventional filter-type dust collectors such as bag filters or cartridge filters, no separate filter replacement is required, so filter clogging can be prevented and the size and area can be minimized, thereby reducing maintenance costs.

[0083] In addition, the zigzag structure and vortex-inducing structure of the Euro section (150) can extend the path of contaminated air while minimizing rapid pressure loss, thereby improving overall airflow efficiency and reducing energy consumption.

[0084] Therefore, when the present invention is applied to industrial sites where high concentrations of dust are continuously generated, such as recycled aggregate production processes, it enables stable operation for a long time and can provide excellent air purification performance.

[0085] Although preferred embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that various substitutions, modifications, and changes are possible within the scope of the technical spirit or essential features of the present invention, and thus the invention may be implemented in other specific forms. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

Claims

Claim 1 A housing (110) having a tubular structure in which a cleaning fluid (W) is stored in an internal receiving space; a contaminated air inlet (120) formed on one side of the housing (110) to allow external contaminated air to flow into the housing (110); an air outlet (130) formed on the other side of the housing (110) to allow air purified by the cleaning fluid (W) to be discharged outside the housing (110); an exhaust fan (140) provided in the air outlet (130) to create negative pressure inside the housing (110); and a plurality of flow paths (150) arranged inside the housing (110) to induce contaminated air to be repeatedly immersed in the cleaning fluid (W) and then move back to the top of the cleaning fluid (W) as it moves from one side of the housing (110) to the other side. The apparatus includes a plurality of perforated plates (160) spaced apart along the flow direction of the cleaning fluid (W) inside the housing (110) to disperse contaminated air into microbubbles within the cleaning fluid (W) and increase the contact area with the cleaning fluid (W); the flow path (150) includes: a submerged guide plate (151) that is formed to extend with a predetermined length from one side inside the housing (110) toward the other side and is positioned at a position lower than the water surface of the cleaning fluid (W); and a guide plate (152) that extends downward from the inner ceiling surface of the housing (110) toward the end of the submerged guide plate (151) to form a gap (G) between the submerged guide plate (151) and the guide plate (152) to induce a vortex of the cleaning fluid (W) by concentrating the negative pressure formed by the exhaust fan (140) in the gap (G). A vortex plate (153) positioned at a predetermined distance from a guide plate (152) and formed in a curved shape to rotate the flow of the cleaning fluid (W) induced through a gap (G) to form a vortex within the cleaning fluid (W); a cover plate (154) positioned at a distance above the vortex plate (153) to change the flow direction of bubbles and fluid rising by the vortex plate (153) to a horizontal direction; and a re-immersion guide plate (155) that guides the contaminated air that has moved along the cover plate (154) back into the cleaning fluid (W) to cause it to be re-immersed.A wet air purification device comprising: an exhaust guide plate (156) positioned at a predetermined distance from the re-immersion guide plate (155) and guiding purified air that has passed through the space formed between it and the re-immersion guide plate (155) toward the air outlet (130); perforated plates (160) may be arranged in multiple numbers at predetermined intervals along the flow direction of the cleaning fluid (W), each perforated plate (160) has a plurality of through holes (161) formed therein, and the diameter of the through holes (161) is formed to gradually decrease along the flow direction of the cleaning fluid (W). Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete

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