KR100769328B1 - Air purification system - Google Patents

Abstract

An air purification system is provided to simultaneously remove harmful gas and particulate material in inflow air, and to prevent degradation of purification efficiency even when being used for long time by using dielectric barrier discharge of a plasma generation unit, a catalyst filter and a bio filter including a carrier attached with microorganism. An air purification system comprises a plasma generation unit(100), a catalyst filter(200) and a bio filter(300). The plasma generation unit allows harmful gas in inflow air to be oxidation-decomposed and converted to a hydrophilic property by generating dielectric barrier discharge, and allows particulate material to be collected and removed, and to be charged by ions. The catalyst filter makes the harmful gas incompletely oxidized in air passed through the plasma generation unit to be decomposed and converted to the hydrophilic property. The bio filter includes a carrier(310) attached with microorganism, and removes hydrophilic harmful gas in air passed through the catalyst filter and the particulate material charged by ions.

Description

Air Purification System

1 is a block diagram of an air purifier according to an embodiment of the present invention;

2 is a schematic cross-sectional view of FIG. 1;

3A to 3C are diagrams illustrating an air purification state by the plasma generation unit of FIG.

4 is a perspective view of the catalyst filter shown in FIG.

5a and 5b is a state diagram of air purification by the biofilter of FIG.

<Explanation of symbols for main parts of the drawings>

100: plasma generating unit 200: catalyst filter

300: biofilter

The present invention relates to a purifier, and more particularly, to an air purifier that removes particulate dust and harmful gases in air.

Generally, contaminated dusts contained in air are mixed with chemical or microbiological dusts.

Accordingly, the air purifier must be able to remove not only solid particulate dust but also gaseous or microbial contaminants.

In the air purifier, dust containing microbial particles is generally used by filtration through a fibrous filter, and in the case of noxious gases, purification techniques using adsorption and biofilters are mainly used.

However, the fiber filter method has to replace the filter from time to time by collecting the dust by colliding, passing through the dust on the fibrous filter, the adsorption and replacement is frequent, there is a problem that takes a lot of maintenance costs.

On the other hand, the biofilter method removes particulate matter at the same time by adsorbing harmful gas to the carrier to which microorganisms are attached, thereby decomposing and reducing harmful gas in exhaust air by the activity of microorganisms, and by simultaneously spraying liquids such as very high humidity or water It becomes possible and is used a lot in recent years.

However, the biofilter method is difficult to cope with the load fluctuation of the incoming harmful substances, and processes only those having gas and particle characteristics that are well soluble in water, and when the microorganisms are present in the incoming dust, there is a problem of causing contamination of the biofilter. have.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an air purifying device that can efficiently remove particulate matter and harmful gases in the air at the same time, and does not cause a decrease in purification efficiency even when used for a long time. .

Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.

The air purifying apparatus of the present invention for achieving the above object, by generating a dielectric barrier discharge to convert the harmful gas in the incoming air into oxidative decomposition and hydrophilic, and to remove particulate matter and charge by ions A plasma generator; A catalytic filter for converting incompletely oxidized harmful gas in the air passing through the plasma generating unit into decomposition and hydrophilicity; It includes a biofilter having a carrier with a microorganism attached to remove particulate matter charged by the hydrophilic harmful gas and ions in the air passing through the catalyst filter.

Here, the catalyst filter preferably comprises a porous filter carrier having a plurality of pores, and catalyst particles bonded to the filter carrier.

The filter carrier may be any one selected from ceramics, metals, metal oxides, polymers, activated carbon, and activated carbon fibers.

In addition, the catalyst particles are preferably any one selected from noble metals, transition metals, and metal oxides.

In addition, the carrier of the biofilter is preferably any one selected from cork, bark, activated carbon, activated carbon fiber, ceramic, polymer.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own inventions. It should be interpreted as meanings and concepts corresponding to the technical idea of the present invention based on the principle of definition.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a configuration diagram of an air purifying apparatus according to an embodiment of the present invention, Figure 2 is a schematic cross-sectional view of FIG.

As shown, the air purification apparatus according to an embodiment of the present invention is provided with a plasma generating unit 100, a catalyst filter 200, a biofilter 300.

The plasma generator 100 generates a dielectric barrier discharge to convert harmful gas in the air introduced therein into decomposition and hydrophilicity, and removes particulate matter and is charged by ions.

Here, the plasma generator 100 applies an alternating current (AC) or a pulsed high voltage to the conductor electrode 110 surrounded by the dielectric 120 spaced apart from each other to generate a dielectric barrier discharge.

When the dielectric barrier discharge is generated by the plasma generator 100, some of the volatile gases (VOCs) are decomposed by electrons, ions, and ozone as shown in FIG. 3A.

That is, oxygen and moisture in the introduced air are converted into reactive materials such as oxygen radicals (O ·), hydroxy radicals (OH ·), and ozone (O ₃ ) by the dielectric barrier discharge of the plasma generator 100. In addition, these reactive substances decompose harmful gases while reacting with harmful gases to perform complete oxidation to produce products such as carbon dioxide (CO ₂ ), water (H ₂ 0), and nitrogen (N ₂ ).

In addition, the hydrophilic conversion of the noxious gas by the plasma generating unit 100 is coupled to a molecule having a hydrophilic group such as -OH, -COOH, -SO ₃ generated by the plasma as shown in FIG.

In addition, as the particulate matter is removed and charged by ions by the plasma generator 100, some particulate matter (PM) charged by ions may be charged in the plasma generator (FIG. 3C). Immediately attached to the conductor electrode 110 of the 100 to remove the dust, or due to the electrical characteristics input to the fluid behavior or alternating current in the plasma generating unit 100 to the air flow in the charged state without being attached to the conductor electrode 110 As a result, particulate matter is released.

The catalytic filter 200 is a filter part that completely oxidizes and decomposes the incompletely oxidized harmful gas in the air passing through the plasma generator 100 and has hydrophilicity.

In addition, the catalyst filter 200 to reduce the ozone generated in the plasma generating unit 100.

As shown in FIG. 4, the catalyst filter 200 includes a porous filter carrier 210 having a plurality of through holes, and catalyst particles 220 coupled to the filter carrier 210.

The filter carrier 210 may be formed of any one material selected from ceramic, metal, metal oxide, polymer, activated carbon, and activated carbon fiber such as foam, monolith, pellet, honeycomb, and honeycomb. It is preferable to form in a form.

In addition, the catalyst particles 220 may be formed of any one material selected from noble metals, transition metals, and metal oxides.

In addition, a heating device (not shown) may be connected to the catalyst filter 200 in order to improve the problem of deterioration in life due to the reduction in the filter's processing capacity due to contamination by air particles and moisture present in the air. have.

The biofilter 300 is a filter part for removing particulate matter charged by hydrophilic harmful gas and ions in the air passing through the catalyst filter 200 by using the carrier 310 to which microorganisms are adsorbed.

The biofilter 300 may spray a fluid such as water or maintain a high humidity state to facilitate the growth of microorganisms.

Here, the carrier 310 of the biofilter 300 is preferably used any one selected from cork, bark, activated carbon, activated carbon fiber, ceramic, polymer.

The hydrophilic harmful gas that has passed through the catalyst filter 200 is diffused and adsorbed onto the interface of the carrier 310 in a state of being combined with water particles present in the biofilter 300 as shown in FIG. 5A. It is decomposed while being converted into products such as carbon dioxide (CO ₂ ), water (H ₂ 0), nitrogen (N ₂ ) by the microorganism.

Then, the charged particulate matter passing through the catalyst filter 200 is combined with water particles to dissolve or attached to the carrier 310 of the biofilter 300 as shown in FIG. 5B.

As described above, the air purifying apparatus of the present invention allows the harmful gas in the air to be decomposed and converted to hydrophilic by the dielectric barrier discharge generated by the plasma generator 100, and the particulate matter is collected and removed. Afterwards, the harmful gas incompletely oxidized by the catalyst filter 200 is converted into decomposition and hydrophilicity, and the biofilter 300 removes harmful gas and particulate matter by water molecules and microorganisms, thereby removing particulate matter in the air. Hazardous gases can be removed at the same time, even if used for a long time does not reduce the purification efficiency.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is described by the person of ordinary skill in the art to which the present invention pertains. Various modifications and variations are possible without departing from the scope of the appended claims.

As described above, the air purifying apparatus of the present invention can simultaneously remove harmful gases and particulate matters in the inflowing air by using the dielectric barrier discharge of the plasma generation unit and microorganisms by the catalytic filter and the biofilter, and thus can be used for a long time. Even if the purification efficiency does not decrease.

Claims (4)

Generating a dielectric barrier discharge to convert harmful gas in the air into oxidative decomposition and hydrophilicity, and collecting and removing particulate matter and charging by ions; A catalytic filter for converting incompletely oxidized harmful gas in the air passing through the plasma generating unit into decomposition and hydrophilicity; And a biofilter provided with a carrier to which microorganisms are attached to remove particulate matter charged by the hydrophilic harmful gas and ions in the air passing through the catalyst filter. The method of claim 1, The catalyst filter is A porous filter carrier having a plurality of through holes; Air purifying apparatus comprising a catalyst particle coupled to the filter carrier. The method of claim 2, The filter carrier is an air purifier, characterized in that any one selected from ceramics, metals, metal oxides, polymers, activated carbon, activated carbon fibers. The method of claim 2, The catalyst particles are air purifiers, characterized in that any one selected from precious metals, transition metals, metal oxides.

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