KR101998692B1 - Electrostatic air filter using activated carbon and method for manufacturing thereof - Google Patents

Abstract

The present invention relates to an electrostatic air filter using activated carbon and a method of manufacturing the same. More particularly, the present invention relates to an electrostatic air filter using an activated carbon, It is possible not only to increase the trapping ability of the pollutant by the adsorption by the adsorption by the micropore of the activated carbon, but also the pollutant adsorbed on the activated carbon is purified by diffusion into the micropores, thereby making the filter self- The present invention relates to a carbon-utilizing static electricity filter and a method of manufacturing the same.
The activated carbon-utilizing electrostatic air filter according to the present invention is characterized in that a polymer film having activated carbon is laminated on a surface thereof, and air flows through an air passage between the laminated films, so that fine dust or contaminants are removed from the film surface or activated carbon And adsorbed on the surface.

Description

TECHNICAL FIELD [0001] The present invention relates to an electrostatic air filter using activated carbon and a method of manufacturing the electrostatic air filter.

The present invention relates to an electrostatic air filter using activated carbon and a method of manufacturing the same. More particularly, the present invention relates to an electrostatic air filter using an activated carbon, It is possible not only to increase the trapping ability of the pollutant by the adsorption by the adsorption by the micropore of the activated carbon, but also the pollutant adsorbed on the activated carbon is purified by diffusion into the micropores, thereby making the filter self- The present invention relates to a carbon-utilizing static electricity filter and a method of manufacturing the same.

In general, the increase in air pollution due to industrial development and urbanization has accompanied severe pollution of indoor and outdoor air, and an air filter is used to purify the polluted air.

The air filter is mainly used for a cold air heater, an air purifier, an automobile or the like, and is mainly made of a nonwoven fabric. Such a nonwoven filter is used for a mechanism such as sieving, interception, impaction, And collects and filters the dust in the air.

The air filter made of a simple nonwoven fabric has a simple manufacturing process and a low cost, and is widely used for various applications. However, the nonwoven fabric type air filter has a disadvantage in that the filtration efficiency of the dust is inferior. Especially, The dust collecting ability of the fine dust is reduced. In the case of the non-woven air filter, the density of the non-woven fabric must be increased in order to narrow the space between the non-woven fabrics in order to filter the fine dust. However, in this case, air circulation through the air filter is not freely performed due to excessively dense fibers, An excessively large pressure loss is caused.

Among the disadvantages of the nonwoven fabric type air filter, an air filter using a nonwoven fabric having a static charge added thereto has been developed and used in order to compensate for the fine dust collecting efficiency. In this case, however, pressure loss, which is one of the disadvantages of the non- It is not greatly improved by its own characteristics.

Another type of air purification method is an electrostatic dust collecting type air cleaning method which removes dust by adding electric charge to dust and a filter. After the electric charge is applied to the dust through the corona discharge, a voltage of the opposite polarity is applied to the dust collecting plate, In this way, the flow of air to the inner space between the dust collecting plates is free, so that the pressure loss is greatly improved and the dust collecting efficiency is also excellent.

However, the electrostatic dust collecting type air cleaning method requires a separate external voltage for corona discharge for adding electric charge to the dust and voltage application of the dust collecting plate, and a proper electric circuit must be constituted. Therefore, The apparatus is larger and disadvantageous in terms of price, and the external power is required for air purification, so that the energy cost is also increased.

Therefore, in recent years, an electrostatic air filter using a polymer film added with electrostatic charge in place of the nonwoven fabric is used as a method for simultaneously achieving the merits of a simple filter type air cleaning method and an electric dust collecting air cleaning method having excellent air flowability have.

The polymeric film-type electrostatic air filter may be configured so that air containing dust is passed through a polymer film separated by an appropriate spacer or through a tube-like structure made of a polymer film, so that dust is collected on the polymer film to which the electrostatic charge is added The pressure loss is greatly improved as compared with the nonwoven fabric type air filter.

However, in the case of the polymeric film type electrostatic air filter, when the dust adheres to the surface of the film and a dust layer having a uniform thickness is formed, the trapping ability decreases and the surface area is smaller than that of the nonwoven fabric air filter. If the diameter of the tubular structure is too large or the spacing between the films is too wide to reduce the pressure loss as well as the drawbacks, the dust passing through the center of the tube will lose the chance of approaching the wall of the filter, There is a problem in that it is likely to come out without being caught in.

In order to solve the problems of the polymer film type electrostatic air filter as described above, Korean Patent Registration No. 10-1177744 (electrostatic air filter and its manufacturing method), Korean Patent Publication No. 10-2013-0049572 (electrostatic air purification clean Filter), Korean Utility Model Registration No. 20-0338240 (anti-infection mask using permanent electrostatic nano filter), recently, a fine unevenness is formed on the surface of a polymer film having electrostatic charge added thereto, An electrostatic air filter improving the dust collecting ability is used. In particular, Korean Patent Laid-Open No. 10-2013-0049572 (Electrostatic Air Purification Clean Filter), Korean Registered Utility Model No. 20-0338240 (Anti-infection mask using permanent electrostatic nano filter) To an electrostatic air filter in which productivity is improved by producing a cylindrical shape in which films are laminated (see Fig. 3).

The film-like electrostatic air filter thus surface-treated has excellent air permeability and is excellent in filtration ability of fine dust, as compared with the non-woven air filter, but has a drawback of low productivity due to the process of forming irregularities on the surface of the polymer film .

Further, in the case of the film-type electrostatic air filter, it is more difficult and costly to manufacture an air filter having an increased surface area for improving the fine dust collecting ability.

On the other hand, in the case of the film type electrostatic air filter, when the air flow is in an abnormal flow (vortex), the generation of static electricity of the contaminant increases and the collection efficiency is increased. However, in the film-type electrostatic air filter, the flow of air including air in the inside of the tube is closely related to the shape of the inner wall of the tube. When the surface has unevenness, a vortex (abnormal flow) When the surface irregularity is irregular, a larger effect can be expected, but forming irregular irregularities on the surface of the polymer film serves to further increase the production cost.

On the other hand, in the case of the conventional film-type electrostatic air filter, contaminants are attached to the uneven film due to use, and the generation of static electricity is deteriorated over time, so that the efficiency of collecting contaminants is drastically reduced, It has limitations in collecting harmful substances having odor particles or chemical properties of several tens of micrograms in size.

 Particularly, in the case of the conventional film-type electrostatic air filter, since bacteria in the air propagate on the surface of the film formed with irregularities after a certain period of use, it causes contamination and odor in the surroundings. Rather, it has a disadvantage that it can harm the human body.

Korean Patent No. 10-1177744: Electrostatic air filter and its manufacturing method Korean Patent Publication No. 10-2013-0049572: Electrostatic air purification clean filter Korean Utility Model No. 20-0338240: Mask for preventing infection using permanent electrostatic nano filter

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a method for producing a polymer film by laminating a polymer film having activated carbon particles adhered on its surface, It is possible to increase the trapping ability of contaminants by the adsorption of fine pores of the cattle, as well as to purify the contaminants adsorbed on the activated carbon by diffusing into fine pores, thereby making the filter self- An air filter and a manufacturing method thereof.

In order to achieve the above-mentioned object, the activated carbon-utilizing electrostatic air filter according to the present invention is characterized in that a polymer film having activated carbon is laminated on a surface thereof, and air flows through an air passage between the laminated films, And the pollutant is adsorbed on the surface of the film or on the surface of the activated carbon.

In the activated carbon-utilizing electrostatic air filter according to the present invention, the activated carbon has a particle size of 1.0 to 2.0 mm.

The activated carbon-utilizing electrostatic air filter according to the present invention is characterized in that the activated carbon-adhered polymer film is rolled and laminated.

The method for producing an activated carbon-utilizing electrostatic air filter according to the present invention is characterized by comprising a binder applying step of applying a binder to one surface or both surfaces of a polymer film fabric, and a step of uniformly spreading the activated carbon particles on the surface of the polymer film coated with the binder An adhering step of adhering the activated carbon particles to the surface of the polymer film by curing the binder and pressing the surface on which the activated carbon particles have been spread with a roller to form a polymer film on the surface of the activated carbon, And a laminating step of laminating the laminated film.

Further, in the method for manufacturing an activated carbon-utilizing electrostatic air filter according to the present invention, the above-described laminating step is characterized in that a polymer film having activated carbon adhered on its surface is wound in a cylindrical shape.

According to the above-described structure, the activated carbon-utilizing electrostatic air filter and the method for manufacturing the same according to the present invention have advantages of simple manufacturing process and low production cost by attaching activated carbon particles to the surface of a polymer film.

In addition, since the size and the attachment position of the activated carbon particles adhered to the polymer surface are varied, the generation of static electricity is increased due to the formation of the abnormal air flow caused by the activated carbon particles .

Also, the activated carbon-utilizing electrostatic air filter and the method of manufacturing the same according to the present invention have the advantage of increasing the ability to collect contaminants by adsorption by static electricity, which is increased by the abnormal air flow, and adsorption by micropores of activated carbon .

In addition, the activated carbon-utilizing electrostatic air filter and the method of manufacturing the same according to the present invention are characterized in that the adsorbed contaminants are diffused into the fine pores of the activated carbon, absorbed into the activated carbon, and the organic compounds in the absorbed contaminants are oxidized, The life of the filter is prolonged.

1 is a view schematically showing a manufacturing process of an activated carbon utilizing electrostatic air filter according to an embodiment of the present invention;
2 is a view conceptually showing a cross section and an action of an activated carbon utilizing electrostatic air filter according to an embodiment of the present invention;
3 is a view showing a general film type electrostatic air filter manufactured in a conventional roll form

Hereinafter, a process of manufacturing the electrostatic-activated air filter using activated carbon according to the present invention will be described in detail with reference to the embodiments shown in the drawings.

FIG. 1 is a view schematically showing a manufacturing process of an activated carbon-utilizing electrostatic air filter according to an embodiment of the present invention. FIG. 2 is a cross- Fig.

Referring to the drawings, an activated carbon-utilizing electrostatic air filter P according to an embodiment of the present invention is characterized in that a filter P is formed by laminating a polymer film F having activated carbon (AC) .

In the drawing, an example of a structure in which a polymer film (F) is rolled up to form a laminated polymer film (F) is shown. In the present invention, a polymer film (F) May be laminated. However, for convenience of explanation, the electroactive carbon utilizing electrostatic air filter according to the present invention and its manufacturing method will be described in detail with reference to the embodiments shown in the drawings.

Referring to FIG. 2, the activated carbon-utilizing electrostatic air filter P according to an embodiment of the present invention includes a polymer film F having activated carbon (AC) So that fine dust or contaminants are adsorbed on the surface of the film (F) or the surface of the activated carbon (AC).

In the present invention, a polyethylene (PE) film or a polycarbonate (PC) film is used as the polymer film, and the activated carbon (AC) is formed using activated carbon having a particle size of 1.0 to 2.0 mm. When the particle size of the activated carbon (AC) is smaller than 1.0 mm, the size of the air passage between the polymer films (F) becomes small and pressure loss is generated. When the particle size is larger than 2.0 mm, the interval between the polymer films (F) It is preferable to use activated carbon (AC) having a particle size in the range of 1.0 to 2.0 mm. The adhesion of AC may be performed by various methods. However, in view of the generation of static electricity and the adsorption efficiency of AC, the adhesion of AC to the polymer film (F) . ≪ / RTI > The figure shows an embodiment in which the surface of the polymer film (F) is coated with a polymer binder (BL) of a component such that the adhesion of the activated carbon (AC) is electrostatically charged like the polymer film (F).

The present invention is characterized in that a ventilation path is formed between the polymer films (F) by performing a function of a spacer interposed between the polymer films (F) in which the activated carbon (AC) particles are laminated. Referring to FIG. 2, an air passage is formed by the particles of activated carbon (AC) between the laminated polymer films F, and the polluted air flows into the air passage, and fine dust or harmful substances The clean air adsorbed on the polymer film (F) by the static electricity or adsorbed on the activated carbon (AC), and the fine dust or harmful substances are removed, is discharged.

On the other hand, since the particles of activated carbon (AC) have various sizes of 1.0 to 2.0 mm and the activated carbon (AC) is attached at irregular positions on the surface of the polymer film (F) The air passing through the furnace forms an unsteady flow (turbulence, TF), and accordingly, the generation of static electricity is greatly increased, so that the collection efficiency can be further increased.

In addition, the present invention is characterized in that fine dust or harmful substances adsorbed on the surface of the polymer film (F) or on the surface of the activated carbon (AC) are absorbed through diffusion into the pores of the activated carbon (AC) Since the harmful substance is removed from the surface of the polymer film (F) or the surface of the activated carbon (AC), the phenomenon that the surface of the polymer film (F) or the activated carbon (AC) is covered with fine dust or harmful substances, It is possible to prevent or delay it.

In addition, the organic compounds absorbed by the activated carbon (AC) are oxidized, and the present invention performs a self-cleaning function for removing harmful substances.

An activated carbon (AC) -adhered polymer film F is laminated in a plurality of piles. In the figure, the polymer film F with the activated carbon (AC) attached thereto is rolled up and laminated 2)

The activated carbon-utilizing electrostatic air filter P according to the present invention, which is rolled up and laminated as described above, is manufactured through the process shown in FIG.

Referring to FIG. 1, a method for manufacturing an activated carbon-utilizing electrostatic air filter according to an embodiment of the present invention includes a coating step, a spraying step, an attaching step, a winding step, and a cutting step.

The application step is a step of applying a liquid polymer binder (BL) to the surface of the polymer film (F) while transferring the polymer film (F) to be unwound from the roll (S) of the polymer film original. Referring to FIG. 1, a polymer film F is applied to a coating roller R1 coated with a binder solution in a binder container (B) for supplying a liquid polymer binder, and the binder is coated on the surface with a thin film.

The spraying step is a step of spraying active carbon (AC) particles evenly so that the activated carbon (AC) is attached to the surface of the polymer film (F) coated with the binder (BL). Various methods can be used to distribute the active carbon (AC) uniformly in the spraying process. For example, the application of the activated carbon (AC) can be performed by a method in which activated carbon particles dispersed in the air by the static electricity of the polymer film (F) adhere to the surface of the polymer film (F) have. The figure shows an embodiment in which activated carbon particles discharged from a hopper (H) containing activated carbon (AC) are uniformly sprayed on the surface of the polymer film (F) to which the binder (BL) is applied and transported.

The adhering process is performed by pressing the applied active carbon (AC) on the pressure roller R2 while drying and curing the binder BL applied so that the applied activated carbon (AC) is adhered to the polymer film (F) ) Particles on the surface of the sprayed polymer film (F). Referring to FIG. 1, the attaching process is performed by heating a polymer film (F) to which activated carbon (AC) is sprayed on the surface of a binder (BL) film to heat the binder (BL) The polymer film F which has undergone the first heating and drying process is pressed by a pressure roller R2 and the polymer film F is heated by a pressure process to completely dry the binder BL Followed by a second heating and drying process for curing.

The laminating step is a step of laminating a polymer film (F) having activated carbon (AC) on the surface thereof in a plurality of layers to form a filter media. As described above, the polymer film (F) is laminated by stacking polymer films (F) with activated carbon (AC) attached thereto. In the figure, the polymer film (F) (PR) in the form of a roll.

The cutting process is a process of manufacturing an activated carbon-utilizing electrostatic air filter (P) in the form of a finished product by cutting a laminated polymer film roll (PR) into a desired length by winding in roll form as described above.

The activated carbon-utilizing electrostatic air filter and the method of manufacturing the same, which have been described above and shown in the drawings, are only one embodiment for carrying out the present invention and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the following claims, and the embodiments improved and changed without departing from the gist of the present invention are obvious to those having ordinary skill in the art to which the present invention belongs It will be understood that the invention is not limited thereto.

P Electrostatic air filter using activated carbon
F polymer film
AC activated carbon
BL binder

Claims (5)

A polymer film having activated carbon adhered on a surface thereof is laminated and a fine dust or a contaminant is adsorbed on a surface of a film or an activated carbon while air flows through an air passage between the laminated films,
Wherein the polymer film on which the activated carbon is adhered is formed by cutting the roll to a predetermined length in a state in which the polymer film having the activated carbon is wound in a roll form. The method according to claim 1,
Wherein the activated carbon has a particle size of 1.0 to 2.0 mm. delete The method for producing an electrostatic air filter using activated carbon according to claim 1 or 2,
A binder applying step of applying a binder to one side or both sides of the polymer film fabric;
An activated carbon spraying step of spraying the activated carbon particles evenly onto the surface of the polymer film coated with the binder,
An adhering step of adhering the activated carbon particles to the surface of the polymer film by curing the binder and pressing the surface on which the activated carbon particles are spread with a roller,
A lamination step of winding a polymer film having activated carbon on the surface thereof in a cylindrical shape and laminating a polymer film having activated carbon on its surface to a plurality of layers;
And a cutting step of cutting the laminated polymer film roll into a predetermined length by winding in roll form in the laminating step. delete

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