KR100589860B1 - Chemical filter media and its manufacturing method - Google Patents

Abstract

The present invention relates to a chemical filter media (20) and a method of manufacturing the same, and more particularly, in the chemical filter media (20) for removing noxious gases, nonwoven fabric or woven fabric to the net body with ion exchange resin or impregnated activated carbon. Chemical filter media (20) and a method for manufacturing the same, characterized in that to prevent the flow or desorption of the ion exchange resin or impregnated activated carbon by pressing and pressing the sewing at a fixed interval (40), in the present invention According to the present invention, the flow or desorption of the ion exchange resin or the impregnated activated carbon can be more stably prevented, so that harmful gases such as ammonia can be removed with high efficiency, and the workability, economical efficiency, and stability are excellent in the manufacturing method.

Chemical Filter Media, Ammonia

Description

Chemical filter media and its manufacturing method {Chemical Filter Media and Its Manufacturing Method}             

1 is a longitudinal sectional view of a chemical filter media 20 in accordance with an embodiment of the present invention;

Figure 2a is a schematic diagram showing a sewing state according to an embodiment of the present invention, Figure 2b is a schematic diagram showing a chemical filter 10 according to an embodiment of the present invention; And

3 is a graph comparing the pressure loss of the chemical filter media 20 according to the embodiment and the comparative example of the present invention.

<Short description of the symbols in the drawings>

10 ... Chemical Filter 20 ... Chemical Filter Media (20)

30 ... ion exchange resin attachment network 40 ... nonwoven or woven fabric (40)

50 ... seam (50)

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical filter media 20 and a method of manufacturing the same, which are used to remove harmful gases from the semiconductor industry or general industrial fields, or in public places, particularly industrial sites exposed to air pollution.

General industrial fields or air pollutants are classified into particulate dust and gaseous substances, and a chemical filter 10 using impregnated activated carbon is required to effectively remove gaseous pollutants.

In general, the impregnated activated carbon chemical filter has a disadvantage in that a large pressure loss caused by air passing through the impregnated activated carbon layer causes a large flow rate reduction rate.

Chemical filters that are used to remove harmful gases from places exposed to air pollution include V-type, flat-type, tray-type chemical filters, and chemical filters using active carbon fibers (ACF). .

V-type, flat-type and tray-type chemical filters are advantageous for the high concentration of impregnated gas collection due to the large amount of impregnated activated carbon, and have the disadvantage of large amount of harmful gas collection and high pressure loss, and ACF type chemical filter or ion exchange Nonwoven fabrics have advantages of low gas concentration, low pressure loss, and light weight, while low gas collection and low price compared to air filters using impregnated activated carbon.

Therefore, in the process of minimizing the pressure loss, it is inevitable to apply an ACF type air filter or ion exchange nonwoven fabric having high maintenance cost and low harmful gas collection efficiency.

According to the registered patent No. 358,262 by the present inventors, a method of attaching impregnated activated carbon to a metal mesh by using a binder, in order to prevent the impregnated activated carbon from being desorbed during use, a nonwoven fabric is formed on both sides of the impregnated activated carbon. It was used to attach and reattach the aluminum mesh to fix the nonwoven fabric.

However, when fixed with an aluminum mesh, since the attached activated carbon and the nonwoven fabric are not completely compressed to the metal mesh, there is a fear that the attached activated carbon may fall, and the work of covering the outside of the nonwoven fabric with the aluminum mesh has a difficult process.

An object of the present invention is to provide a chemical filter media (20) excellent in workability, stability, economics and harmful gas removal efficiency, and a method of manufacturing the same.

In order to achieve the above object of the present invention, in the chemical filter media 20 for removing toxic gases, nonwoven fabric or woven fabric 40 is pressed onto a mesh with an ion exchange resin or impregnated activated carbon and sewn at a predetermined interval. It provides a chemical filter media (20) characterized in that to prevent the flow or desorption of the ion exchange resin or impregnated activated carbon by fixing.

In the chemical filter media 20 according to the present invention, the sewing interval of the sewing line 50 of the nonwoven fabric or the woven fabric 40 is characterized in that it is sewn to 0.1 to 4 inches (or 0.254 to 10.16 cm).

In addition, in the manufacturing method of the chemical filter media (20) for achieving the above another object, after applying the binder on the network, the ion exchange resin or impregnated activated carbon is attached, the ion exchange resin or impregnated activated carbon is attached After pressing and fixing the nonwoven fabric or woven fabric 40 on both sides of the support, the chemical filter media 20 is manufactured by preventing the flow or desorption of the ion exchange resin or the impregnated activated carbon by sewing at a predetermined interval using a sewing machine. Provide a method.

In the method for manufacturing the chemical filter media 20 according to the present invention, the sewing interval of the sewing line 50 of the nonwoven fabric or the woven fabric 40 is characterized in that the sewing is 0.1 to 4 inches (or 0.254 to 10.16 cm). .

The chemical filter media 20 according to the present invention can efficiently remove harmful gases such as ammonia, which are inorganic malodorous components generated in semiconductors and other industrial sites, and have excellent workability, economy, and stability.

Hereinafter, the present invention will be described in detail.

 The chemical filter media 20 according to the present invention has the following configuration.

The chemical filter media 20 of the present invention is composed of an impregnated activated carbon or ion exchange resin capable of removing nets and harmful gases, and a nonwoven fabric or woven fabric 40 for preventing the impregnated activated carbon or ion exchange resin from being desorbed.

The mesh constituting the present invention serves as a support of the chemical filter media 20, and preferably, aluminum mesh, polyethylene mesh, polypropylene mesh or polyurethane mesh may be used, but is not limited thereto. . When the mesh is used as a support, pressure loss in the chemical filter can be minimized.

Activated carbon is an aggregate of well-developed amorphous carbons made of wood, lignite, anthracite and palm bark as raw materials. Activated carbon has a large internal surface area due to the formation of fine pores of molecular size. It is an adsorbent had. The adsorbent may have a surface area of 1,000 mm 2 or more per g, and a functional group of carbon atoms on the surface adsorbs molecules of the adsorbate by attracting the surrounding liquid or gas.

Impregnated activated carbons constituting the present invention are activated carbons by adding a special chemical to general activated carbon so as not to fall on the activated carbon surface and the pore surface, thereby enhancing chemical adsorption performance. Adsorption of harmful gases by the impregnated activated carbon utilizes a property in which the surface of the adsorbent and the adsorbate are bonded by physical or chemical attraction, which may be used to selectively separate or purify certain components from the mixed adsorbate. The harmful gas collection capability in the chemical filter 10 is achieved by using such an impregnated activated carbon.

Ion-exchange resins are insoluble synthetic resins with ions capable of ion exchange. The ion selectivity of the ion exchange resin preferentially catches only cations and cation exchange resins only anions. In other words, the ion exchange method removes harmful gases such as ammonia.

An ion exchange resin, which is a component of the present invention, was prepared to adsorb harmful gases by chemically treating an ion exchange resin that has been used for water treatment. Since the ion exchange resin has a small particle diameter, it is difficult to use the ion exchange resin itself, so that the ion exchange resin is attached to the metal mesh instead of the impregnated activated carbon in the same manner as the method disclosed in the inventors' Patent No. Media 20 may be produced. By using a cation exchange resin, an anion exchange resin or impregnated activated carbon, a chemical filter media 20 capable of effectively removing various gases can be produced.

Chemical filter media 20 according to the present invention having the configuration as described above is evenly coated with a binder (binder) does not affect the performance of the ion exchange resin or impregnated activated carbon on the network, and then the ion exchange resin or impregnation After the activated carbon is completely attached to the mesh using a compression roller, the chemical filter media 20 are produced by drying in an oven at 40 ± 5 ° C. for at least 2 hours.

The binder used at this time is preferably a polyurethane binder, an acrylic binder, a vinyl acetate binder or an ethylene vinyl acetate binder.

In addition, the particle diameter of the impregnated activated carbon attached on the support is preferably 0.5 to 1 mm.

At this time, the filter media to be produced may be manufactured in a flat, zigzag or tubular shape, but it is preferable to be used by bending the zigzag filter in order to increase the contact area of the filter and lower the pressure loss.

In order to prevent desorption or flow of the impregnated activated carbon or ion exchange resin in the filter media prepared as described above, the nonwoven fabric or the woven fabric 40 is fixed to both sides of the mesh, and then sewing using a sewing machine according to the present invention. Chemical filter media 20 are prepared.

At this time, the sewing interval of the sewing line 50 at the time of sewing is preferably sewn to 0.1 to 4 inches (or 0.254 to 10.16 cm). When the sewing distance of the sewing line 50 is less than 0.1 inch (or 0.254 cm), the nonwoven fabric or woven fabric 40 may be detached from the mesh, or the ion exchange resin or the impregnated activated carbon in the media may flow or detach. In addition, when the sewing interval of the sewing line 50 exceeds 4 inches (or 10.16 cm), the non-woven fabric or woven fabric 40 is not preferable because the collection efficiency of the harmful gas decreases as the moxibustion does not adhere to both sides of the mesh. not.

The chemical filter media 20 of the present invention manufactured in the above-described configuration is compared with the conventional aluminum mesh fixed, and immediately fixed by sewing the nonwoven fabric or woven fabric 40 without using the aluminum mesh, thereby reducing the manufacturing cost. And, the weight can be reduced, and even a simple process as described above was able to produce a very excellent chemical filter media (20) to reach the removal efficiency of harmful gases 100%.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following examples are provided to illustrate the present invention, but the scope of the present invention is not limited or limited by the following examples. Therefore, one of ordinary skill in the art can add various modifications and changes to the present invention without departing from the technical spirit of the present invention, the modifications and changes are also within the scope of the present invention. Should be understood.

<Example 1>

The aluminum mesh is cut into an appropriate size for making a filter. The vinyl acetate-based binder is evenly applied to the cut aluminum mesh. An excess of cation exchange resin is applied to the aluminum mesh evenly coated with the binder. Excess applied network is applied to the cation exchange resin to the network while applying pressure using a roller. After the attachment is completed, the excess cation exchange resin is removed from the net, and the net with the cation exchange resin attached is dried in an oven at 40 ° C. After stacking 3 ~ 4 sheets of cations exchanged resin with dried cations, attach the woven fabric to both sides of the net. In order to fix the mesh and woven fabric, a chemical filter media 20 was fabricated by sewing at intervals of 0.1 to 4 inches using a sewing machine to remove basic gases such as NH ₃ .

In addition, by using anion exchange resin and impregnated activated carbon in place of the cation exchange resin, a chemical filter media 20 capable of removing various gases can be produced.

The chemical filter 10 was manufactured using the chemical filter media 20 prepared as described above. The manufactured filter was manufactured by bending to lower the pressure loss. The size of the filter was produced as 305 (W) X 305 (H) X 150 (D) mm. Pressure loss (see FIG. 3 ) and removal efficiency evaluation (see Table 1 ) were evaluated on a 2.5 m / s basis.

Comparative Example 1

Chemical filter 10 using the chemical filter media 20 manufactured in the same manner as in Example 1, except that instead of sewing by using a sewing machine on both sides of the woven fabric of Example 1 to fix the woven fabric with aluminum mesh Was produced.

Experimental Example 1

Pressure loss evaluation was based on 2.5m / s. The results are shown in FIG. 3 . It can be seen from the results of FIG. 3 that the pressure loss of the chemical filter media sewn and fixed according to the embodiment of the present invention is relatively small.

Experimental Example 2

Removal efficiency was evaluated based on 2.5m / s. The results are shown in Table 1 below.

Item Example 1 Comparative Example 1 Shear (ppbv) Trailing (ppbv) efficiency(%) Shear (ppbv) Trailing (ppbv) efficiency(%) ammonia 20.78 0 100 15.92 0.3 98.1

From the above results, it can be seen that the chemical filter 10 manufactured using the chemical filter media 20 according to Example 1 has an excellent ammonia removal efficiency of 100%.

The chemical filter media 20 of the present invention having the above-described configuration and a method of manufacturing the same have a weight reduction as compared to the chemical filter media 20 produced by fixing a nonwoven fabric with a conventional aluminum mesh, as well as ion exchange resins or impregnated activated carbon. The flow or desorption can be more stably prevented. In addition, instead of using aluminum mesh, the nonwoven fabric or woven fabric 40 is directly pressed and sewn on both sides of the mesh with ion exchange resin or impregnated activated carbon, and thus its workability, economic efficiency, stability and removal efficiency are excellent. In addition, there is an advantage that can be used stably even when applied to the air conditioner by making the chemical filter 10 using the media.

Claims (4)

In the chemical filter media 20 for removing noxious gas, the ion exchange resin or the impregnated material is formed by pressing the nonwoven fabric or the woven fabric 40 onto the mesh with ion exchange resin or impregnated activated carbon, and sewing and fixing them at a predetermined interval. Chemical filter media (20), characterized in that to prevent the flow or desorption of activated carbon. The chemical filter media (20) according to claim 1, wherein the sewing interval of the sewing line (50) of the nonwoven fabric or woven fabric (40) is sewn to be 0.1 to 4 inches (or 0.254 to 10.16 cm). In the manufacturing method of the chemical filter media (20), applying a binder on the network, and then attached to the ion exchange resin or impregnated activated carbon, non-woven fabric or woven fabric (40) on both sides of the network with ion exchange resin or impregnated activated carbon Method of manufacturing a chemical filter media (20) characterized in that to prevent the flow or desorption of the ion exchange resin or impregnated activated carbon by pressing and fixing the sewing at a predetermined interval using a sewing machine. The method of claim 3, wherein the sewing interval of the sewing line 50 of the nonwoven fabric or the woven fabric 40 is 0.1 to 4 inches (or 0.254 to 10.16 cm).

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