KR101619763B1 - pore filter media of two-layered having electropositive charge and method therefor - Google Patents

pore filter media of two-layered having electropositive charge and method therefor Download PDF

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Publication number
KR101619763B1
KR101619763B1 KR1020140034653A KR20140034653A KR101619763B1 KR 101619763 B1 KR101619763 B1 KR 101619763B1 KR 1020140034653 A KR1020140034653 A KR 1020140034653A KR 20140034653 A KR20140034653 A KR 20140034653A KR 101619763 B1 KR101619763 B1 KR 101619763B1
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South Korea
Prior art keywords
filter
weight
slurry
water
fibers
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KR1020140034653A
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Korean (ko)
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KR20150111142A (en
Inventor
한정철
박성은
박창순
김형범
한정석
김길섭
김영필
곽은정
이상철
박희원
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주식회사 엔바이오니아
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Priority to KR1020140034653A priority Critical patent/KR101619763B1/en
Priority to PCT/KR2014/005329 priority patent/WO2015147378A1/en
Publication of KR20150111142A publication Critical patent/KR20150111142A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/18—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003—Glass or glassy material
    • B01D39/2017—Glass or glassy material the material being filamentary or fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/08—Special characteristics of binders
    • B01D2239/086—Binders between particles or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1233—Fibre diameter
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Filtering Materials (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)

Abstract

In the present invention, since the fibrous layers are formed in a two-layer structure and a positive charge is added to the second fibrous layer, not only the microbial filtration rate and the collecting efficiency are increased, but also the pressure loss is reduced and the fibrous layers are laminated in a liquid state to form needle punching machines, resin adhesives, It is possible to firmly bind the fibrous layers without any additional binding means such as thermal fusion or the like and to perform the desired filter function because the pores and the circular shape are not deformed and the filter composition contained in the filter slurry of each fibrous layer is 0.1 to 1.0 탆 55 to 75% by weight of ultra-fine staple fibers having a diameter of 10 to 25 μm, 10 to 25% by weight of fine fibers which are glass fibers having a diameter of 1.0 to 5.0 μm, Porous filter media having a positive charge added thereto and having a weight of more than 35 wt% It is about the law.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a porous filter media having a two-layer structure and a method of manufacturing the same,

The present invention relates to a two-layered porous filter media having a positive charge added thereto and a method for producing the porous filter media. More particularly, the present invention relates to a porous filter media having a positive charge added thereto, To a porous filter media having a two-layer structure with a positive charge added thereto, which can increase the collection efficiency and reduce the pressure loss, and can increase the binding force of the fibrous layers without a separate coupling member, and a method for manufacturing the same.

A filter medium is a device installed in a moving path through which fluid or water passes to filter out fine dust or contaminants in the fluid.

Natural organic matter (Nom), ionic materials and chemicals are usually present in the water, and these materials pollute the water when they are not completely removed from the water treatment process and generate new pollutants It acts as a cause. In particular, the virus is formed into a microscopic size, which is not filtered by general filtration and forms a strong resistant cyst so that it can survive for several months or more in the water.

Since water pollution is directly related to the health of the human body, various studies have been conducted on water filter filters for efficiently filtering contaminants in water.

Accordingly, the present applicant has studied a porous filter media having a positive charge added thereto which can efficiently filter microorganisms such as viruses having a negative charge by adding a positive charge to the glass fiber, and disclosed in Korean Patent No. 10-0513602 (entitled " Porous filter media manufacturing apparatus and method), and a filter media having a two-layer structure in which the dense layer and the honeycomb layer are laminated in a liquid phase to lower the pressure loss and increase the collecting efficiency have been studied and are disclosed in Korean Patent No. 10-1201759 (The name of the invention: a filter medium having a two-layered structure of high concentration and low concentration).

The porous filter medium disclosed in Korean Patent No. 10-0513602 has a merit that it can efficiently filter a negatively charged microorganism including a colloid resin for adding a positive charge to the glass fiber. However, since the fiber layer is formed as a single layer, The efficiency is low and the pressure loss is high.

The filter media described in Korean Patent No. 10-1201759 is produced by preparing a filter slurry containing ultrafine staple fibers to have different head box densities and then laminating filter slurries having different head box densities in a liquid phase, The present invention has the advantage of reducing the pressure loss and increasing the collection efficiency. However, since there is no separate means for adding a positive charge to the fiber layer, it has a limitation that it can not efficiently filter the negatively charged microorganisms.

1 is a side view of a porous filter manufacturing apparatus disclosed in Korean Patent No. 10-0513602 (entitled " Porous filter media manufacturing apparatus and method with positively charged addition) "

The porous filter manufacturing apparatus 100 of FIG. 1 includes an agitator 102 for agitating the slurry, a belt (not shown) for forming the filter media 101 by laminating the slurry agitated by the agitator 102 A vacuum suction device 104 for removing moisture in the filter media 101 stacked on the belt 103 and a roller presser device 104 for pressurizing the filter media from which moisture has been removed by the vacuum suction device 104 A drying device 106 for removing residual water in the filter media 101 that has passed through the roller pressurizing device 105 and a filter media 101 for removing residual water by a drying device 106 And a winding device 107 for separating and winding the belt 103 from the belt 103.

The stirrer 102 is charged with 15 to 25% by weight of a resin selected from the group consisting of melamine formaldehyde, colloidal silica and mixtures thereof, 2 to 5% by weight of hydrochloric acid (Muriatic Acid) To 80% of water are mixed and stirred to prepare a colloidal resin. Then, 50 to 70% by weight of glass fibers having a diameter of 0.05 to 0.75 μm, 20 to 45% by weight of cellulose having a diameter of 10 to 20 μm, % By weight is mixed and stirred to prepare a slurry.

Thus, in the conventional art 100, by positively charging the glass fiber by stirring the glass fiber and the colloid resin, it becomes possible to remarkably increase the microbial filtration efficiency with a negative charge.

However, in the prior art (100), since the fiber layer made of glass fiber, cellulose, and colloid resin is formed as a single layer, the pressure loss is increased and the collecting efficiency is lowered when the fiber layer is formed into a plurality of layers.

Although the conventional technique 100 is formed of a plurality of fiber layers by applying a known method such as a needle punching machine, a resin adhesive, a surfactant, and a thermal fusion to overcome this problem, the above- Not only deforms and destroys the properties but also has a disadvantage in that the manufacturing process is troublesome.

Also, when the liquid phase laminating method of the Korean Patent No. 10-1201759 filed by the present inventor in the prior art (100) (the name of the invention: filter medium having a two-layered structure of high concentration and low concentration) is applied, It is disadvantageous in that the water flow rate and the cumulative flow rate, which are the most important factors in the water treatment filter, are lowered.

As described above, it is urgently required to study a filter media for water treatment which can increase the efficiency of bacterial and viral filtration in the water by adding a positive charge to the glass fiber and at the same time, to be.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a method for producing a fibrous layer, which comprises fibrous layers forming a high concentration and a low concentration, Layer structure porous filter media with a positive charge capable of reducing pressure loss and a method for manufacturing the same.

Further, another object of the present invention is to provide a method for producing a fiber-reinforced composite material, which is capable of further reducing the pressure loss by stacking fibrous layers forming a high concentration and a low concentration in a liquid phase and without using a separate binding means such as a needle punching machine, Layer structure of a porous filter media to which positive charge is applied so that the interlayer coupling is excellent and the pores and the circular shape are not deformed so as to perform a desired filter function, and a method for manufacturing the same.

Another object of the present invention is to provide a filter composition in which the filter composition contained in the first fiber layer and the second fiber layer contains 55 to 75% by weight of ultrafine staple fibers which are glass fibers having a diameter of 0.1 to 1.0 탆, And 10 to 25% by weight of fine fibers which are glass fibers having a diameter of 5 탆 or more and 0 to 35% by weight of glass fibers of glass fibers having a diameter of 5 탆 or more, And a method for manufacturing the same.

According to a first aspect of the present invention, there is provided a method for manufacturing a positive-acting porous filter media for filtering bacteria and viruses in water by adding a positive charge to the glass fiber, comprising the steps of: 5 to 25% by weight of a resin selected from the group consisting of colloidal silica and a mixture thereof, 2 to 5% by weight of hydrochloric acid (Muriatic Acid) and 70 to 90% by weight of water are mixed and stirred to prepare a colloidal resin ; 55 to 75% by weight of ultrafine staple fibers having a diameter of 0.1 to 1.0 탆, 10 to 25% by weight of microfine fibers having a diameter of 1.0 to 5.0 탆 and 0 to 5% A first filter slurry producing step of preparing a first filter slurry by mixing 1.5 to 2.5% by weight of a filter composition comprising 35% by weight and 97.5 to 98.5% by weight of water; Preparing a second filter slurry by mixing 50 to 70% by weight of the filter composition, 10 to 25% by weight of the colloidal resin, and 15 to 40% by weight of cellulose; A liquid phase laminating step of laminating the first filter slurry produced by the first filter slurry producing step and the second filter slurry produced by the second filter slurry producing step in a liquid phase; A moisture removing step of sucking moisture of the filter media stacked by the liquid phase laminating step; A pressurizing step of pressurizing the filter media having passed through the water removal step; A residual moisture removing step of removing residual moisture of the filter media that has passed through the pressing step; And a winding step of winding the filter media having passed through the residual moisture removing step, wherein the filter fiber laminating device applied to the liquid phase laminating step comprises: an enclosure having a receiving space therein and having an inclined opening at one side thereof; A separating part which is formed of a flat plate material and horizontally installed inside the enclosure and has an end exposed at an opening of the enclosure to separate at least one receiving space of the enclosure; At least one inlet path for introducing each of the filter slurries produced by the filter slurry producing step into each of the receiving spaces of the enclosure separated by the separating section; A roof plate which is formed of a plate material having a plurality of drain grooves passing through both sides thereof and is connected to each other at both ends to be spaced apart from the inclined openings; Wherein the filter slurry received in each of the receiving spaces of the housing is discharged through the opening into a loop plate region adjacent to the opening and the filter slurry is moved upward as the loop plate is moved upwardly They are sequentially stacked according to the installation height of the storage space.

Also, in the present invention, it is preferable that the liquid phase laminating step laminate the first filter slurry to a headbox concentration of 0.05 to 1.00 mass% and the second filter slurry to a headbox concentration of 0.03 to 0.06 mass%.

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According to the present invention having the above-mentioned solution, the fibrous layers are formed in a two-layer structure, and positive charge is added to the second fibrous layer, thereby increasing microbial filtration efficiency and collection efficiency, as well as reducing pressure loss.

Further, according to the present invention, since the fibrous layers are laminated in a liquid state, the fibrous layers can be firmly bound without any other binding means such as a needle punching machine, a resin adhesive, a surfactant and heat fusion, . ≪ / RTI >

According to the present invention, the filter composition contained in the filter slurry of each fibrous layer is composed of 55 to 75% by weight of ultrafine staple fibers which are glass fibers having a diameter of 0.1 to 1.0 탆, microfine fibers having a diameter of 1.0 to 5.0 탆, 10 to 25% by weight, and more than 0 to 35% by weight of glass fiber, which is a glass fiber having a diameter of 5 탆 or more.

1 is a side view of a porous filter manufacturing apparatus disclosed in Korean Patent No. 10-0513602 (entitled " Porous filter media manufacturing apparatus and method with positively charged addition) "
Figure 2 is a side view of a positively charged filter media, which is an embodiment of the present invention.
Fig. 3 is an exemplary view for explaining the ingredients contained in Fig. 2; Fig.
4 is a flow chart showing a process for producing a first filter slurry for forming the first fibrous layer of Fig.
Fig. 5 is a flow chart showing the manufacturing process of the second filter slurry for forming the second fibrous layer of Fig. 2;
6 is a flow chart illustrating a process for fabricating a positive charge filter material, which is an embodiment of the present invention.
7 is a side view showing a filter fiber laminating apparatus applied to the liquid phase laminating step of Fig.
FIG. 8 is a perspective view of FIG. 7, except for the roof plate.
9 is a graph showing the collecting efficiencies of Examples 1 to 3 and Experimental Example 5 for Comparative Examples 1 to 8.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

Fig. 2 is a side view showing a positively charged filter media according to an embodiment of the present invention, and Fig. 3 is an exemplary view for explaining ingredients contained in Fig. 2. Fig.

The positively charged filter element 1 of FIGS. 2 and 3 has a two-layer structure of a first fibrous layer 3 and a second fibrous layer 5, in which filter slurries having different headbox concentrations are laminated in a liquid phase to form low density and high density And a positive charge is added to the glass fiber of the second fibrous layer 5 forming the high concentration, thereby remarkably increasing the filtration efficiency of the microorganisms having a negative charge.

The first fiber layer 3 is formed of a first filter slurry 30 having a headbox concentration of 0.05 to 1.00 mass% and the first filter slurry 30 comprises 1.5 to 2.5 weight percent of the filter composition 20, And 97.5 to 98.5% by weight of the dispersion liquid 51 produced by the dispersion preparation step S11 of FIG. 4 to be described later is mixed. In this case, the filter composition 20 comprises 55 to 75% by weight of ultrafine staple fiber 21 which is a glass fiber having a diameter of 0.1 to 1.0 탆, 10 to 25% of microfibers 22 which are glass fibers having a diameter of 1.0 to 5.0 탆 And 0% by weight to 35% by weight of glass fiber (23) which is a glass fiber having a diameter of 5 占 퐉 or more.

The second fiber layer 5 is formed of a second filter slurry 50 having a headbox concentration of 0.03 to 0.06 mass percent and the second filter slurry 50 is formed of 50 to 70 weight percent of the filter composition 20, 10 to 25% by weight of the colloidal resin (51) and 15 to 40% by weight of the cellulose (53) are mixed. Wherein the colloidal resin 51 comprises 5 to 25% by weight of a resin selected from the group consisting of melamine formaldehyde, colloidal silica and mixtures thereof, 2 to 5% by weight of hydrochloric acid, By weight and 70 to 90% by weight.

The first fiber layer 3 and the second fiber layer 5 of the positively charged filter element 1 are formed such that the first filter slurry 30 and the second filter slurry 50 are in contact with the filter fiber laminating apparatus 300 The fibrous layers 3 and 5 are firmly bound together without using a separate binding means such as a needle punching machine, a resin adhesive, a surfactant and a thermal fusion, 5 are not deformed so that the desired filter function can be performed.

The filter composition 20 forming the first filter slurry 30 and the second filter slurry 50 comprises 55 to 75 wt% of the ultrafine staple fibers 21 having a diameter of 0.1 to 1.0 탆 as described above, 10 to 25% by weight of fine fibers 22 having a diameter of ~ 5.0 탆 and more than 0 to 35% by weight of fine glass fibers 23 having a diameter of 5 탆 or more.

The ultrafine staple fibers 21 and the microfibers 22 may be one or more of borosilicate glass, C glass with acid resistance, E-glass (non-alkali glass), low boron glass and silica glasses, And is formed of short staple fibers, either of which are mixed.

Also, the ultrafine staple fiber 21 is a glass fiber having a diameter of 0.1 to 1.0 탆 and is composed of 55 to 75% by weight of the filter composition 20. At this time, if the content of the ultrafine staple fibers 21 is less than 55% by weight, the content of the ultrafine staple fibers is lowered and the efficiency of collecting is lowered. If the content of the ultrafine staple fibers 21 is less than 77% , The binding force and the pressure loss between the fibrous layers are lowered.

Further, the fine fibers 22 are glass fibers having a diameter of 1.0 to 5.0 탆 and are composed of 10 to 25% by weight of the filter composition 20.

The glass fiber 23 is formed of glass fiber having a diameter larger than that of the ultrafine staple fibers 21 and the fine fibers 22 and having a diameter of 5 탆 or more in detail. By weight to 35% by weight.

4 is a flow chart showing a process for producing a first filter slurry for forming the first fibrous layer of Fig.

The first filter slurry manufacturing step S10 includes a dispersion preparing step S11, a filter composition preparing step S12 and a first stirring step S13 as shown in FIG.

The dispersion producing step S11 is a step of maintaining water as a dissolving liquid at 10 to 30 캜 and a dispersion 31 of water having a temperature of 10 to 30 캜 is used in a first stirring step S13. At this time, the temperature of the liquid (solution) is preferably 20 ° C.

The filter composition preparing step S12 is a step of preparing a filter composition comprising 55 to 75% by weight of the ultrafine staple fibers 21, 10 to 25% by weight of the fine fibers 22 and 0 to 35% by weight of the glass fibers 23 20) is prepared.

The first agitation step S13 is performed by adding 1.5 to 2.5 wt% of the filter composition 20 prepared by the filter composition preparation step S12 to 97.5 to 98.5 wt% of the dispersion solution 31 produced by the dispersion preparation step S11 And mixing and stirring to produce the first filter slurry 30.

Fig. 5 is a flow chart showing the manufacturing process of the second filter slurry for forming the second fibrous layer of Fig. 2;

The second filter slurry production step S20 of FIG. 5 comprises a colloidal resin preparation step S21, a filter composition preparation step S22, and a second stirring step S23.

The colloidal resin preparation step (S21) comprises 5 to 25% by weight of a resin selected from the group consisting of melamine formaldehyde, colloidal silica and mixtures thereof, 2 to 5% by weight of hydrochloric acid, And 70 to 90% by weight of water are mixed and stirred to prepare a colloidal resin 51.

The filter composition manufacturing step (S22) is a process step of manufacturing the filter composition (20) by the same process as the filter composition manufacturing step (12) of FIG.

The second agitation step S23 is a step of mixing 10 to 25% by weight of the colloidal resin 51 produced by the colloidal resin preparation step S21 and 50 to 70% by weight of the filter composition 20 produced by the filter composition preparation step S22 By weight and 15 to 40% by weight of celluloses (53) are mixed and stirred to prepare a second filter slurry (50).

6 is a flow chart illustrating a process for fabricating a positive charge filter material, which is an embodiment of the present invention.

The positive active filter medium manufacturing method S1 of FIG. 6 includes the first filter slurry manufacturing step S10 of FIG. 4, the second filter slurry manufacturing step S20 of FIG. 5 described above, the first filter slurry manufacturing step S10 of FIG. A first mixing step (S30) of mixing the first filter slurry (30) produced by the step (S10) with water at a headbox concentration of 0.05 to 1.00 mass%, and a second filter slurry production step A second mixing step (S40) of mixing the second filter slurry (50) having a headbox concentration of 0.03 to 0.06 mass% in water, and a second mixing step (S40) A liquid phase laminating step (S50) of laminating the first filter slurry (30) and the second filter slurry (50) mixed in the liquid phase step (S30) and the second mixing step (S40) A water removal step (S60) for removing moisture from the filter media in which the filter slurries are stacked, and a water removal step (S60) using a pressurizing device A pressurizing step (S70) of pressing the dried filter media to increase the bonding force between the fibers while maintaining the moldability of the filter media, and a residual moisture removing step of removing residual moisture of the pressurized filter media by the pressurizing step (S70) (S80), and a winding step (S90) for separating and winding the filter media from which the residual moisture has been removed by the residual moisture removing step (S80).

The first mixing step (S30) is a processing step in which the first filter slurry (30) produced by the first filter slurry producing step (S10) is mixed with water to have a head box density of 0.05 to 1.00 mass%.

Also, the first filter slurry 30 mixed at the headbox concentration of 0.05 to 1.00 mass% by the first mixing step (S30) is mixed into the prepared accommodating space, and the accommodating space is used in the liquid phase laminating step (S50) The first filter slurry is transferred to the filter fiber laminating apparatus 300 through the moving pipe.

The second mixing step (S40) is a processing step in which the second filter slurry (50) produced by the second filter slurry producing step (S20) is mixed with water to have a headbox concentration of 0.03 to 0.06 mass%.

In addition, the second filter slurry 50 mixed at a headbox concentration of 0.03 to 0.06 mass% by the second mixing step (S40) is mixed into the prepared accommodating space, and the accommodating space is used in the liquid phase laminating step (S50) And the second filter slurry received through the pipe is moved to the filter fiber laminating apparatus 300.

The liquid phase laminating step S50 is performed by using the filter fiber laminating apparatus 300 of FIG. 7 to be described later. The first filter slurry 30 (30) mixed in water at a headbox concentration of 0.05 to 1.00 mass% ) And a second filter slurry (50) mixed in water at a headbox concentration of 0.03 to 0.06 mass% by a second mixing step (S40).

The liquid phase laminating step (S50) also allows the filter media to be formed into a two-layer structure by laminating the second filter slurry on top of the first filter slurry. The process of laminating the first filter slurry and the second filter slurry in the liquid phase by the filter fiber laminator 300 will be described later in detail with reference to FIGS. 7 and 8. FIG.

The water removal step S60 is a process step of removing moisture of the filter media in which the first filter slurry and the second filter slurry are stacked by the laminating step S50 and the moisture removal step S60 of the filter fiber laminating apparatus 300 of FIG. The suction portion 308 is used to remove moisture from the filter media. At this time, the suction part 308 sucks air with a vacuum pressure of 10 to 100 cmHg to remove water of the slurry by 90% or more.

The pressurization step S70 is a process step for maintaining the moldability of the filter media as well as increasing the interlayer coupling force by pressing the filter media with moisture removed by the water removal step S60.

The pressurization step S70 also allows the filter media to be forced through the filter media between adjacent rollers that are positioned adjacent but are not shown in the figure. At this time, the pressure of the rollers is preferably 100 to 1,000 kgf / cm2.

The residual moisture drying step (S80) is a step of removing residual moisture of the filter media that has passed through the pressurizing step (S70). Specifically, the positive charge filter media is dried using hot air at a temperature of 100 to 150 占 폚.

Fig. 7 is a side view showing a filter fiber laminating apparatus applied to the liquid phase laminating step of Fig. 6, and Fig. 8 is a perspective view excluding the roof plate in Fig. 7;

The filter fiber laminating apparatus 300 of FIGS. 7 and 8 is applied to the liquid phase laminating step S50 to form a first filter slurry 30 (FIG. 7) mixed in water at a headbox concentration of 0.05 to 1.00 mass% by a first mixing step S30 ) And a second filter slurry (50) mixed in water at a headbox concentration of 0.03 to 0.06 mass% by a second mixing step (S40).

In addition, the filter fiber laminating apparatus 300 includes a housing 311 having one side and an upper surface opened and having an internal space and having one side formed as an inclined surface, and a cover plate (not shown) provided on the opened upper surface of the housing 311 313 and the inner space of the housing 311 formed inside the housing 311 of the housing 301 is formed of a plate material so that the inner space of the housing 311 is divided into the first housing space 321 and the second housing space 311. [ And a second inlet 322 for introducing the first filter slurry and the second filter slurry into the first accommodation space 321 and the second accommodation space 322 of the housing 311, The opening 311 of the housing 311 is formed at a predetermined distance from the inclined opening 331 of the housing 311. The opening 331 of the housing 311 is formed by a plate member, A loop plate 306 in which the filter slurries discharged through the loop plate 306 are stacked in a liquid phase on the upper surface, a rotating unit 307 which loops the loop plate 306, A suction unit 308 provided at a lower portion of the roof plate 306 immediately below the opening 331 of the roof plate 311 and sucking the moisture of the filter slurry stacked on the roof plate 306, And a storage portion 309 which is formed as an enclosure having an opened upper portion and installed on the ground according to the path of the roof plate 306 to receive the water drained from the suction portion 308 and the roof plate 306.

In order to simplify the description, the positive charge filter element 1 is formed in a two-layer structure so that one separator 303 is provided, so that the internal space of the casing 311 is divided into one separator 303 The first filter slurry and the second filter slurry are separated into the first accommodation space 321 and the second accommodation space 322 in which the first filter slurry and the second filter slurry are respectively received. Can be changed corresponding to the number of fiber layers forming the positively chargeable filter element 1. For example, when the positively chargeable filter element 1 has a three-layer structure, the separating part is composed of two, and the two separating parts are provided inside the enclosing body 311 so as to be parallel to the lower surface of the enclosing body 311, So that the inner space of the housing 311 is separated into three accommodating spaces.

In the filter fiber laminating apparatus 300 configured as described above, the inner space of the housing 311 is divided into the first housing space 321 and the second housing space 322 by the separation portion 303, The second filter slurry is introduced into the second accommodating space 322 through the second inlet 305 and accommodated in the first accommodating space 321 formed in the upper portion of the second accommodating space 322, The first filter slurry is introduced and accommodated.

The first filter slurry and the second filter slurry accommodated in the first accommodation space 321 and the second accommodation space 322 are moved to the ends of the separation part and are guided through the sloped openings 331 of the housing 311 to the roof plate 306, respectively. At this time, since the roof plate 306 moves in the direction from the bottom to the top, when the first filter slurry is placed on the top surface of the roof plate 306, the first filter slurry is stacked on top of the second filter slurry do.

The inclined angle of the opening 331 of the housing 311 and the roof plate 306 is preferably 10 to 45 degrees. At this time, if the inclination angles of the opening 331 and the roof plate 306 are less than 10 degrees, the fiber layers are piled up in a flat state, so that the air permeability is increased beyond a desired value. If the inclination angle is more than 45 degrees, Since the filter fibers of the filter slurry solution discharged to the upper surface of the roof plate are moved downward along the roof plate in a state where they are not stacked, the laminating process is not efficiently performed.

The loop plate 306 is a microfiber mesh of hydrophilic PET mesh 70-80.

Further, the roof plate 306 is adjusted in accordance with the height of the lamination of the slurry and the thickness of the positively charged filter media, and is preferably 10 to 100 m / min.

Further, the moisture of the filter slurry solution stacked on the roof plate 306 is drained to the lower portion of the roof plate 306 through drain grooves (not shown), and the filter compositions (fibers) of the filter slurry solution do not pass through the drain grooves And is deposited on top of the roof plate 306 in a state where it can not be used. The suction portion 308 provided at the lower portion of the roof plate 306 immediately under the opening of the housing 311 sucks the moisture of the filter slurry solution formed on the roof plate 306, Can be efficiently removed.

The suction portion 308 sucks the slurry deposited on the upper portion of the roof plate 306 to remove 90% or more of the moisture of the slurry, and more specifically, generates a vacuum pressure of 10 to 100 cmHg.

Hereinafter, the positive charge filter material, which is an embodiment of the present invention, will be described in more detail with reference to Examples and Comparative Examples. The following embodiments are for illustrative purposes only and do not limit the scope of protection of the present invention.

Table 1 is a table showing the components contained in Examples 1 to 3 and Comparative Examples 1 to 8.

1st floor filter medium 1st floor filter medium Filter composition Colloid resin Filter composition (% by weight) Dispersion (wt%) Filter composition (% by weight) Colloid (wt%) Cellulose (wt%) Ultrafine staple fiber (% by weight) Fine fibers (% by weight) 촙 Strand (% by weight) Melamine (% by weight) Hydrochloric acid (% by weight) Water (% by weight) Example One 2 98 60 25 15 60 25 15 20 3 77 2 2 98 70 15 15 60 25 15 20 3 77 3 2 98 50 20 30 60 25 15 20 3 77 Comparative Example One 2 98 40 35 25 60 25 15 20 3 77 2 2 98 80 5 15 60 25 15 20 3 77 3 2 98 80 15 5 60 25 15 20 3 77 4 2 98 60 15 25 80 10 10 20 3 77 5 2 98 60 15 25 30 55 25 20 3 77 6 2 98 60 15 25 35 25 40 20 3 77 7 2 98 70 15 15 60 25 15 3 3 94 8 2 98 70 15 15 60 25 15 35 3 62

Examples 1 to 3 and Comparative Examples 1 to 8 will now be described with reference to Table 1.

[Example 1]

A first fiber layer comprising 2.0% by weight of a filter composition and 98% by weight of a dispersion;

A second fiber layer comprising 60% by weight of the filter composition, 25% by weight of the colloidal resin and 15% by weight of cellulose;

The filter composition is composed of 60% by weight of ultrafine staple fibers, 25% by weight of fine fibers and 15% by weight of glass fibers,

The colloidal resin is composed of 20% by weight of melamine formaldehyde, 3% by weight of hydrochloric acid and 77% by weight of water.

[Example 2]

A first fiber layer comprising 2.0% by weight of a filter composition and 98% by weight of a dispersion;

A second fiber layer comprising 70% by weight of the filter composition, 15% by weight of the colloidal resin and 15% by weight of cellulose;

The filter composition is composed of 60% by weight of ultrafine staple fibers, 25% by weight of fine fibers and 15% by weight of glass fibers,

The colloidal resin is composed of 20% by weight of melamine formaldehyde, 3% by weight of hydrochloric acid and 77% by weight of water.

[Example 3]

A first fiber layer comprising 2.0% by weight of a filter composition and 98% by weight of a dispersion;

A second fiber layer comprising 50% by weight of the filter composition, 20% by weight of the colloidal resin and 30% by weight of cellulose;

The filter composition is composed of 60% by weight of ultrafine staple fibers, 25% by weight of fine fibers and 15% by weight of glass fibers,

The colloidal resin is composed of 20% by weight of melamine formaldehyde, 3% by weight of hydrochloric acid and 77% by weight of water.

[Comparative Example 1]

A first fiber layer comprising 2.0% by weight of a filter composition and 98% by weight of a dispersion;

A second fiber layer comprising 40% by weight of the filter composition, 35% by weight of the colloidal resin and 25% by weight of cellulose;

The filter composition is composed of 60% by weight of ultrafine staple fibers, 25% by weight of fine fibers and 15% by weight of glass fibers,

The colloidal resin is composed of 20% by weight of melamine formaldehyde, 3% by weight of hydrochloric acid and 77% by weight of water.

[Comparative Example 2]

A first fiber layer comprising 2.0% by weight of a filter composition and 98% by weight of a dispersion;

A second fiber layer comprising 80% by weight of a filter composition, 5% by weight of a colloidal resin and 15% by weight of cellulose;

The filter composition is composed of 60% by weight of ultrafine staple fibers, 25% by weight of fine fibers and 15% by weight of glass fibers,

The colloidal resin is composed of 20% by weight of melamine formaldehyde, 3% by weight of hydrochloric acid and 77% by weight of water.

[Comparative Example 3]

A first fiber layer comprising 2.0% by weight of a filter composition and 98% by weight of a dispersion;

A second fiber layer composed of 80% by weight of the filter composition, 15% by weight of the colloidal resin and 5% by weight of cellulose;

The filter composition is composed of 60% by weight of ultrafine staple fibers, 25% by weight of fine fibers and 15% by weight of glass fibers,

The colloidal resin is composed of 20% by weight of melamine formaldehyde, 3% by weight of hydrochloric acid and 77% by weight of water.

[Comparative Example 4]

A first fiber layer comprising 2.0% by weight of a filter composition and 98% by weight of a dispersion;

A second fiber layer comprising 60% by weight of the filter composition, 15% by weight of the colloidal resin and 25% by weight of cellulose;

The filter composition comprises 80% by weight of ultrafine short fibers, 10% by weight of fine fibers and 10% by weight of glass fiber,

The colloidal resin is composed of 20% by weight of melamine formaldehyde, 3% by weight of hydrochloric acid and 77% by weight of water.

[Comparative Example 5]

A first fiber layer comprising 2.0% by weight of a filter composition and 98% by weight of a dispersion;

A second fiber layer comprising 60% by weight of the filter composition, 15% by weight of the colloidal resin and 25% by weight of cellulose;

The filter composition comprises 30% by weight of ultrafine staple fibers, 55% by weight of fine fibers, and 15% by weight of glass fibers,

The colloidal resin is composed of 20% by weight of melamine formaldehyde, 3% by weight of hydrochloric acid and 77% by weight of water.

[Comparative Example 6]

A first fiber layer comprising 2.0% by weight of a filter composition and 98% by weight of a dispersion;

A second fiber layer comprising 60% by weight of the filter composition, 15% by weight of the colloidal resin and 25% by weight of cellulose;

The filter composition comprises 35% by weight of ultrafine staple fibers, 25% by weight of fine fibers and 40% by weight of glass fibers,

The colloidal resin is composed of 20% by weight of melamine formaldehyde, 3% by weight of hydrochloric acid and 77% by weight of water.

[Comparative Example 7]

A first fiber layer comprising 2.0% by weight of a filter composition and 98% by weight of a dispersion;

A second fiber layer comprising 70% by weight of the filter composition, 15% by weight of the colloidal resin and 15% by weight of cellulose;

The filter composition is composed of 60% by weight of ultrafine staple fibers, 25% by weight of fine fibers and 15% by weight of glass fibers,

The colloidal resin is composed of 3% by weight of melamine formaldehyde, 3% by weight of hydrochloric acid and 94% by weight of water.

[Comparative Example 8]

A first fiber layer comprising 2.0% by weight of a filter composition and 98% by weight of a dispersion;

A second fiber layer comprising 70% by weight of the filter composition, 15% by weight of the colloidal resin and 15% by weight of cellulose;

The filter composition is composed of 60% by weight of ultrafine staple fibers, 25% by weight of fine fibers and 15% by weight of glass fibers,

The colloidal resin is composed of 35% by weight of melamine formaldehyde, 3% by weight of hydrochloric acid and 62% by weight of water.

[Experimental Example 1]

- Zeta potential test

The zeta potential of the filter media was measured to analyze the electrical characteristics of the filter media. The zeta potential value was measured using an ELS8000 zeta potential meter from Otsuka Electronics.

[Experimental Example 2]

- Quantity test

The flow rate was measured at a rate of 2.0 kgf / ㎠ at a flow rate of 100 L / min.

[Experimental Example 3]

- Bacterial elimination test

The bacteria were prepared so that the final number of E. coli bacteria was 10 5 CFU / ml in the tap water from which the free residual chlorine had been removed. After the filters were attached, 100 L of the prepared water was passed, and samples were collected and the number of bacteria was measured.

[Experimental Example 4]

- virus removal test

After passing 30 ml or more of mu lunalovirus (10 4 PFU / ml) to the water having free residual chlorine removed, 50 ml of passage water was collected to measure the virus removal ability.

Table 2 shows the measured values of Examples 1 to 3 and Comparative Examples 1 to 8 for Experimental Examples 1 to 3.

zeta potential (mv) Volume (L) Bacterial clearance (%) Virus Removability (%) Example

One 12.85 2.4 99.999 99.997 2 11.93 2.3 3 12.51 2.5 Comparative Example






One 18.60 2.8 2 5.70 2.2 3 11.90 2.2 4 11.94 2.4 5 11.93 2.2 6 11.93 2.6 99,900 98.500 7 2.75 2.4 99.600 47.370 8 15.60 2.4 99,000 99.600

Examples 1 to 3 and Comparative Examples 1 to 8 will be described with reference to Table 2.

Experiments were carried out on the bacteria removal ability test of Experimental Example 3 and the virus removal ability test of Experimental Example 4 in Example 1 and Comparative Examples 1 and 6 to 8.

In Examples 1 to 3, the zeta potential values were measured as 12.85 wmV, 11.93 mV and 12.51 mV as the colloidal resin contained 25 wt%, 15 wt% and 20 wt% in the second fiber layer, It can be seen that a positive charge is added to the glass fiber of the fiber layer.

In Examples 1 to 3, 60% by weight, 70% by weight and 50% by weight of the filter composition containing ultrafine staple fibers were contained in the second fiber layer, and L, 2.3 L and 2.5 L were measured, .

In addition, Example 1 shows that filter slurries containing a filter composition containing ultrafine staple fibers are formed into a two-layer structure, and thus have a high bacterial removing ability of 99.9%. In the second fiber layer, 25% by weight of colloidal resin is contained It is understood that it has excellent virus removal ability of 99.997%.

In Comparative Examples 1 to 8, the zeta potential values of 18.60 mV, 5.70 mV, 11.90 mV, 11.94 mV, 11.93 mV, 11.93 mV, 2.75 mV and 15.60 mV were measured through Experimental Example 3 and 2.8 L , 2.2 L, 2.2 L, 2.4 L, 2.2 L, 2.6 L, 2.4 L and 2.4 L, respectively.

In Comparative Example 1, since the colloidal resin for adding a positive charge is contained in the second fiber layer in an amount of 35% by weight, it can be seen that the zeta potential value is higher than the other Comparative Examples. However, As the content of the colloidal resin is increased to lower the content of the filter composition, the tightness of the network constituted by the fibers and the fibers is decreased and the bacteria removing ability is lowered.

In Comparative Example 2, the zeta potential value was lowered as the colloidal resin contained 5 wt% of the colloidal resin in the second fiber layer. In Comparative Example 7, the zeta potential value decreased as the colloidal resin contained 3 wt% of melamine.

In addition, referring to Comparative Examples 1 to 8, the relationship between the zeta potential value and the colloid resin shows that as the content of the colloid resin increases, the positive charge amount increases in the glass fiber and the zeta potential value increases. At this time, if the colloidal resin exceeds 25% by weight, the content of the filter composition becomes small as shown in Table 3 to be described later, and the collection efficiency is lowered.

Also, in Comparative Example 1, as the content of the filter composition is 40 wt% in the second fiber layer, that is, as the content of the ultrafine staple fibers is decreased, the flow rate is increased as compared with other comparative examples.

In Comparative Example 6, as the filter composition contains 40% by weight of glass fiber, the pressure loss is reduced, but the collection efficiency is lowered as shown in Table 3 to be described later.

In Comparative Example 8, 35% by weight of melamine was contained in the colloidal resin, and the zeta potential value was measured high. However, since the content of the filter composition was decreased, the network tightness between the fibers and the fibers was decreased, The results were ineffective.

[Experimental Example 5]

- Capture efficiency test

The turbidity preparation water (kaolin particles) was fixed at a pressure of 2.0 kgf / cm 2 and analyzed using a filtration analyzer after passing through a 100 L flask.

Table 3 shows the collection efficiency (%) of Examples 1 to 3 and Comparative Examples 1 to 8.

0.1 탆 0.4 탆 0.7 탆 1.0 탆 Example 1 98.2 99.9 100.0 100.0 Example 2 98.0 99.7 99.8 99.8 Example 3 97.8 99.7 99.7 99.8 Comparative Example 1 96.8 98.7 98.7 98.8 Comparative Example 2 96.5 99.3 99.4 99.5 Comparative Example 3 96.7 99.5 99.6 99.7 Comparative Example 4 95.2 98.0 98.1 98.2 Comparative Example 5 95.2 97.0 97.1 97.2 Comparative Example 6 95.3 97.1 97.2 97.3 Comparative Example 7 98.0 98.2 98.2 98.2 Comparative Example 8 96.0 97.1 97.4 98.0

9 is a graph showing the collecting efficiencies of Examples 1 to 3 and Experimental Example 5 for Comparative Examples 1 to 8.

With reference to Table 3 and FIG. 9, the collecting efficiencies of Examples 1 to 3 and Comparative Examples 1 to 8 were as follows. Examples 1 to 3 were prepared by passing distilled water containing kaolin particles having a particle size of 0.1 to 1.0 μm 4, it can be seen that the efficiency of removing 1.0 ㎛ particles is 100.0%, 100.0% and 99.8%, respectively.

In Comparative Examples 1 to 8, when the preparation water containing kaolin particles having a particle size of 0.1 to 1.0 탆 was passed, the particle removal efficiency of 1.0 탆 was 98.8%, 99.5%, 99.7%, 98.2%, 97.2%, 97.3% %, 98.2%, and 98.0%, respectively.

Comparative Example 1 shows that the second fiber layer contains 40% by weight of the filter composition, and as described above in Table 2, the zeta potential value and the virus removal performance are excellent, but the content of the filter composition is reduced and the collection efficiency is lowered.

In Comparative Example 8, the colloid resin contained 35% by weight of melamine, and as described above in Table 2, the zeta potential value was high. However, since the content of the filter composition was decreased and the tightness of the network between the fibers and the fibers was decreased, Which was not effective in removing bacteria and viruses. At this time, in Comparative Example 8, since the positive charge is excessively added to the glass fiber, the repulsive force between the fibers is generated, so that the degree of dispersion between the fibers becomes very different and ultimately the pore size variation becomes large.

1: positive charge filter element 3: first fiber layer 5: second fiber layer
30: first filter slurry 50: second filter slurry
300: filter fiber laminating apparatus 301: accommodating section 303: separating section
304: first inlet path 305: second inlet path 306: roof plate
30: Suction section 309: Storage section 311: Enclosure
313: cover plate 321: first accommodation space 322: second accommodation space

Claims (6)

A method for producing a positively charged porous filter media for filtering germs and viruses in water by adding a positive charge to the glass fiber, the method comprising:
5 to 25% by weight of a resin selected from the group consisting of melamine formaldehyde, colloidal silica and mixtures thereof, 2 to 5% by weight of hydrochloric acid and 70 to 90% by weight of water A step of preparing a colloidal resin by stirring to produce a colloidal resin;
55 to 75% by weight of ultrafine staple fibers having a diameter of 0.1 to 1.0 탆, 10 to 25% by weight of microfine fibers having a diameter of 1.0 to 5.0 탆 and 0 to 5% A first filter slurry producing step of preparing a first filter slurry by mixing 1.5 to 2.5% by weight of a filter composition comprising 35% by weight and 97.5 to 98.5% by weight of water;
Preparing a second filter slurry by mixing 50 to 70% by weight of the filter composition, 10 to 25% by weight of the colloidal resin, and 15 to 40% by weight of cellulose;
A liquid phase laminating step of laminating the first filter slurry produced by the first filter slurry producing step and the second filter slurry produced by the second filter slurry producing step in a liquid phase;
A moisture removing step of sucking moisture of the filter media stacked by the liquid phase laminating step;
A pressurizing step of pressurizing the filter media having passed through the water removal step;
A residual moisture removing step of removing residual moisture of the filter media that has passed through the pressing step;
And a winding step of winding the filter media that has passed through the residual moisture removal step,
The filter fiber laminating apparatus applied to the liquid phase laminating step
An enclosure having a receiving space therein and having an inclined opening at one side thereof;
A separating part which is formed of a flat plate material and horizontally installed inside the enclosure and has an end exposed at an opening of the enclosure to separate the accommodating space of the enclosure into at least one or more than one;
At least one inlet path for introducing each of the filter slurries produced by the filter slurry producing step into each of the receiving spaces of the enclosure separated by the separating section;
A roof plate which is formed of a plate material having a plurality of drain grooves passing through both sides thereof and is connected to each other at both ends to be spaced apart from the inclined openings;
And a rotating portion for moving the loop plate upward,
The filter slurry accommodated in each of the accommodating spaces of the housing is discharged to the roof plate region adjacent to the opening through the opening, and as the roof plate is moved upward, the filter slurries are sequentially stacked according to the installation height of the accommodation space in which the filter slurries are stored Lt; RTI ID = 0.0 > porous < / RTI > The method of claim 1, wherein the liquid phase laminating step comprises laminating the first filter slurry to a headbox concentration of 0.05 to 1.00 mass% and the second filter slurry to a headbox concentration of 0.03 to 0.06 mass% Method of manufacturing media. delete delete delete delete
KR1020140034653A 2014-03-25 2014-03-25 pore filter media of two-layered having electropositive charge and method therefor KR101619763B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100513602B1 (en) * 2003-05-26 2005-09-16 부산대학교 산학협력단 An method for making the pore filter media of having the electropositive charge, and its making apparatus
KR101201759B1 (en) * 2012-05-08 2012-11-15 주식회사 엔바이오니아 Filter medium of two-layered structure with high and law conentration
KR101323181B1 (en) 2013-01-28 2013-10-30 주식회사 엔바이오니아 Laminating apparatus of fiber layer and method of filter medium with multi-layer therefor

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
US4511473A (en) * 1982-02-09 1985-04-16 Amf Incorporated Fibrous media containing millimicron-sized particulates
US8622224B2 (en) * 2010-02-26 2014-01-07 Kx Technologies, Llc Method of making a filter media with an enriched binder
KR101085950B1 (en) * 2011-05-13 2011-11-22 주식회사 엔바이오니아 Method and system for manufacturing glass fiber filter media

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100513602B1 (en) * 2003-05-26 2005-09-16 부산대학교 산학협력단 An method for making the pore filter media of having the electropositive charge, and its making apparatus
KR101201759B1 (en) * 2012-05-08 2012-11-15 주식회사 엔바이오니아 Filter medium of two-layered structure with high and law conentration
KR101323181B1 (en) 2013-01-28 2013-10-30 주식회사 엔바이오니아 Laminating apparatus of fiber layer and method of filter medium with multi-layer therefor

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