KR20050079100A - Ceramic filter comprising active carbon fiber and method for preparing thereof - Google Patents

Abstract

The present invention relates to a ceramic filter comprising activated carbon fibers and a method of manufacturing the same. In particular, the activated carbon fibers having a small particle diameter and a large specific surface area are provided in the pores of the ceramic filter, thereby increasing the adsorption area of the ceramic filter and thus reducing the harmful substances. Adsorption and deodorization performance is improved, and durability, abrasion resistance, and heat resistance are excellent, excellent sterilization effect against microorganisms, reusable by rapid desorption, and at the same time excellent in moldability, production of large filters The present invention relates to a ceramic filter comprising an activated carbon fiber that is easy to control porosity and to a method of manufacturing the same.

Description

Ceramic filter containing activated carbon fiber and manufacturing method thereof {CERAMIC FILTER COMPRISING ACTIVE CARBON FIBER AND METHOD FOR PREPARING THEREOF}

The present invention relates to a ceramic filter comprising activated carbon fibers and a method for manufacturing the same. More particularly, the adsorption area of the ceramic filter is increased by providing activated carbon fibers having a small particle diameter and a large specific surface area in the pores of the ceramic filter. Adsorption to detrimental substances and deodorization performance is improved, durability, abrasion resistance and heat resistance are excellent, excellent sterilization effect against microorganisms, can be reused by rapid desorption, and at the same time excellent moldability, large The present invention relates to a ceramic filter comprising an activated carbon fiber that is easy to produce a filter and easily adjusts porosity, and a method of manufacturing the same.

Harmful substances such as dust, soot, waste gas, smoke, and volatile organic chemicals (VOC's) generated in each industrial process are a serious environmental problem, and are very high in the purification and separation of these pollutants. I became interested.

Some polymer filters are used to prevent the release of such pollutants, but polymer filters have a problem in that heat resistance, chemical resistance, abrasion resistance, and flame retardancy are weak.

Accordingly, the development of ceramic filters has been made. Ceramic filters are much more excellent in heat resistance, chemical resistance, and abrasion resistance than polymer filters, and in particular, excellent in heat resistance, there is no need to install a cooling device in the exhaust system. The advantage is that it can be saved.

In the case of the conventionally developed ceramic filter, it is common to use a tube form using ceramic fibers by vacuum molding or extrusion molding, which has advantages in that the filtration efficiency and back pressure characteristics are excellent, but the manufacturing cost is high, The filter's durability decreases due to deterioration of the ceramic fiber when used for a long time, and the filtration efficiency is lowered. Also, when the filter regenerates compressed air during the regeneration of the filter, the ceramic fiber is broken and the ceramic fiber is broken. In case of normal operation, there is a problem of generating secondary pollution by being discharged in the exhaust gas, and also it is difficult to control the porosity of the ceramic filter, and when the whole ceramic filter has a structure having the same porosity, dust is caught inside. The pressure loss increases and the back pressure increases due to the clogging of the filter. There is a problem in that.

Meanwhile, in order to purify and separate pollutants, activated carbon fiber (ACF) having micropores is manufactured as a felt or a molded product of a filter to purify and separate water from an air purifier. And solvent recovery systems.

Compared with conventional activated carbon, activated carbon fiber has a specific surface area and uniform particle size distribution, and the particle size is small, so that the adsorption rate is very fast by minimizing the material movement resistance of the adsorbent outside and inside. In addition, the adsorption capacity and adsorption rate is further improved, reusable by rapid desorption, and has a wide moldability.

However, there is no example of applying the activated carbon fiber to the ceramic filter, and there is a need for a study on the method of applying the activated carbon fiber to the ceramic filter having various advantages.

In order to solve the problems of the prior art as described above, an object of the present invention is to provide a ceramic filter with improved adsorption area, deodorizing performance for harmful substances by increasing the adsorption area of the ceramic filter.

Another object of the present invention is to provide a ceramic filter excellent in durability, wear resistance, and heat resistance.

Still another object of the present invention is to provide a method of manufacturing a ceramic filter that is easy to change shape and produce a large filter, and has a range of wear resistance, heat resistance, and porosity control range.

It is another object of the present invention to collect dust from the surface while having the above characteristics, and to prevent clogging, and at the same time, to reduce pressure loss, and to significantly improve air permeability and collection efficiency. It is to provide a manufacturing method.

In order to achieve the above object, the present invention provides a ceramic filter, comprising a activated carbon fiber provided in the pores of the ceramic filter.

In addition, the present invention

a) preparing a slurry based on ceramic powder;

b) Activated carbon fiber nonwoven fabric or felt slurry prepared in step a)

   Immersed in to prepare a molding;

c) activated carbon fiber nonwoven fabric or felt loaded with slurry in step b)

   Drying the molding; And

d) the activated carbon fiber non-woven fabric or felt molding dried in step c)

Sintering under nitrogen (N ₂ ) atmosphere

It provides a method of manufacturing a ceramic filter comprising a.

Hereinafter, the present invention will be described in detail.

The ceramic filter comprising the activated carbon fibers of the present invention is characterized in that it comprises activated carbon fibers provided in the pores of the ceramic filter.

The ceramic filter including the activated carbon fiber of the present invention is provided with activated carbon fibers having a small particle size and a large specific surface area in the pores of the ceramic filter to which the ceramic powders are sintered and combined to significantly increase the adsorption area for harmful substances in the ceramic filter. Improve. Figure 1 shows the pore structure of the surface of the activated carbon fiber used in the present invention, it can be seen that the fine pores are arranged uniformly. Preferably, the activated carbon fibers provided in the voids are connected in the form of a nonwoven fabric or felt. In this case, when desorption for reuse of the ceramic filter, activated carbon fibers do not escape from the pores, it may be provided in the pores after the desorption process.

The activated carbon fiber of the present invention may be activated carbon fiber prepared through the normal carbonization (including the activation process) and sintering process, as a specific example, the activated carbon fiber is a polymer fiber in the organic solvent It is prepared by dissolving and spinning.

As the polymer fiber, cellulose fiber, phenol resin fiber, PAN fiber, or pitch may be used. In particular, it is preferable to use cellulose fiber.

As the organic solvent, any polymer capable of dissolving polymer fibers may be used, and in particular, it is preferable to use an organic solvent exhibiting solubility in tetrahydrofuran, pyridine, or the like.

The polymer fiber and the organic solvent are preferably mixed at a ratio of 0.1 to 0.5: 1 wt%, and when the ratio is within the above range, there is an advantage in that activation after carbonization is well performed.

The activated carbon fibers preferably have an average particle diameter of 40 GPa or less, a specific surface area of 700 to 2500 m 2 / g, more preferably an average particle diameter of 10 to 40 m 2, and a specific surface area of 700 to 1500 m 2 / g. It is good that it is short fiber.

In addition, the amount of activated carbon fibers included in the ceramic filter in the present invention can be appropriately changed according to the intended use, and, of course, is preferably contained in 1 to 98% by volume with respect to the ceramic filter of the present invention. If the content is within the above range, the adsorption to harmful substances, deodorizing performance, the sterilization effect against microorganisms is more excellent, there is an effect that can be reused by rapid desorption.

The ceramic filter including the activated carbon fiber of the present invention has the advantages of the ceramic filter having excellent heat resistance, chemical resistance, and abrasion resistance, and the adsorption area of the ceramic filter is provided by providing the activated carbon fiber having a small particle size and a large specific surface area in the pores of the ceramic filter. Significantly increased, the adsorption and deodorization performance for harmful substances is improved, the sterilization effect on microorganisms is excellent, porosity is easily controlled, and can be reused by rapid desorption.

In another aspect, the present invention provides a method for producing a ceramic filter comprising activated carbon fibers, the method for producing a ceramic filter of the present invention is to prepare a slurry based on the ceramic powder, the prepared slurry is activated carbon fiber nonwoven fabric or After supporting the felt to prepare a molded article, the molded article is dried and sintered.

Referring to the manufacturing method of the ceramic filter of the present invention step by step.

a) slurry production

This step is to prepare a slurry based on the ceramic powder, the slurry is,) silicon carbide, alumina, silymanite (sillimanite group, Al ₂ O ₃ · SiO ₂ ), kaolin group, Al ₂ O 25 to 60 parts by weight of ceramic powder selected from the group consisting of ₃ · 2 SiO ₂ · 2H ₂ O), silica (SiO ₂ ), titania, diatomaceous earth, blast furnace slag, waste foundry sand, and ash, ii) clay 10 to 40 parts by weight, i) 5 to 40 parts by weight of the pore-forming agent, i) 1 to 20 parts by weight of the binder, and i) 20 to 60 parts by weight of the dispersion.

The ceramic powder of i) used in the present invention is a component constituting the basic structure of the ceramic filter after sintering, and serves as a support for the ceramic filter.

The ceramic powder may be a ceramic powder of various conventional forms used in the art. The ceramic powder is silicon carbide, alumina, silymanite (sillimanite group, Al ₂ O ₃ · SiO ₂ ), kaolin (kaolin group, Al ₂ O ₃ · 2SiO ₂ · 2H ₂ O), silica (SiO ₂ ), titania It is preferable to use diatomaceous earth, blast furnace slag, waste foundry sand, or ash, and more preferably to use alumina, silicon carbide or a mixture thereof.

The ceramic powder may use components having various particle sizes, and certain components may have the same particle size, and may be used by mixing the same components having different particle sizes, in particular, the particle size of 0.001 ㎛ to 1 mm It is preferable. When the particle size of the ceramic powder is within the above range, there is an effect that can improve pore formation and mechanical strength of the ceramic filter.

The ceramic powder is preferably contained in 25 to 60 parts by weight, more preferably 30 to 50 parts by weight. If the content is in the above range, there is an effect that can maintain the physical strength and shape of the ceramic filter, and at the same time has an effect that can significantly improve the filtration efficiency. In addition, it is possible to prevent distortion and cracking during sintering and to increase wear resistance of the ceramic filter. It is also better in that waste can be recycled.

The clay of ii) used in the present invention is a component that forms the basic structure of the ceramic filter after sintering, and serves to facilitate bonding between ceramic particles during sintering.

The clay may be a component having a variety of particle size, a certain component may have the same particle size, and may be used by mixing the same component having a different particle size, in particular, it is a particle size of 0.001 ㎛ to 1 mm desirable. When the particle size of the clay is in the above range, there is an effect that can improve the pore formation and mechanical strength of the ceramic filter.

The clay is preferably included in 10 to 40 parts by weight, more preferably 15 to 25 parts by weight. When the content is in the above range, there is an effect that can maintain the physical strength and shape of the ceramic filter, and at the same time has an effect that can significantly improve the filtration efficiency. In addition, it is possible to prevent distortion and cracking during sintering and to increase wear resistance of the ceramic filter.

The pore-forming agent of i) used in the present invention functions to form pores of the ceramic filter.

The pore-forming agent may be carbon, activated carbon, wood powder, sawdust, salt, naphthalene, talc or the like.

Of course, the pore-forming agent can be used a component having a variety of particle size, it is particularly preferred that the particle size of 0.001 ㎛ to 1 mm. If the particle size of the pore-forming agent is within the above range, there is an effect that can improve the pore formation and mechanical strength of the appropriate size of the ceramic filter.

The pore-forming agent is burned away in the sintering process to form pores of the ceramic filter, the content of which is preferably contained in 5 to 40 parts by weight, more preferably 10 to 25 parts by weight. If the content is within the above range, there is an effect that can be completely burned during sintering to effectively form pores of the ceramic filter.

The binder of i) used in the present invention functions to form a slurry and a carrier.

The binder may be a conventional organic binder, an inorganic binder, or a mixture thereof, and in particular, it is preferable to use a mixture of an inorganic binder and an organic binder.

Specifically, the binder may be an inorganic binder of frit, barium carbonate (BaCO ₃ ), or mono aluminum phosphate (MAP), a water binder, polyvinyl butyral, polyvinyl alcohol, or polyvinylacetate. An organic binder can be used, and it is particularly preferable to mix frit and water grass.

The binder is preferably included 1 to 20 parts by weight, more preferably 5 to 10 parts by weight. If the content is within the above range, there is an effect that can effectively combine the slurry and the carrier.

The dispersion of iii) used in the present invention may vary depending on the type of the binder, and it is particularly preferable to use water or alcohol.

The dispersion is preferably included in 20 to 60 parts by weight, more preferably 20 to 30 parts by weight. When the content is in the above range, it is possible to effectively mix each component included in the slurry, there is an effect that the slurry can be effectively bound to the carrier by maintaining the proper viscosity.

In addition, the slurry composition containing the above components may further include a flame retardant iii) to form pores of the final ceramic filter.

Of course, all flame retardants can be used, and in particular, organic compounds such as phosphorus, nitrogen, or halogens and inorganic compounds such as antimony can be used. The flame retardant may be used alone or in admixture of two or more thereof, and in particular, a phosphorus-nitrogen compound, a phosphorus-halogen compound, or an antimony-halogen compound may be used.

Specifically, the flame retardant is phosphorus, bromine, chlorine, fluorine, antimony, nitrogen, boron, bromide phosphate, THPC-NH ₃ , phosphonitrile chloride (phosphonitrilic chloride, etc.), borax-boronic acid, organophosphate-urea, antimony oxide Halogen compounds, THPC-diamine, tetra bromo bisphenol A (TBBA), brominated epoxy oligomers (BEO), deca bromo diphenyl ether, deca bromo diphenyl ethane, octa Bromo diphenyl ether, tetra bromo bisphenol A carbonate oligomer, tetra bromo bisphenol A dibromo propyl ether, hexa bromo diphenoxy ethane, tris tribromo phenoxy cyanurate, tetra bromo bisphenol A system Epoxy resins, ethylene bis tetrabromo phthalimide, antimony trioxide, or antimony pentoxide.

The flame retardant is preferably included in 5 to 60 parts by weight of the slurry composition. When the content is within the above range, the pores of the ceramic filter are efficiently formed, so that the filtration efficiency and durability are more excellent.

When the slurry composition further comprises a flame retardant, the dispersion of iii) may use a solvent that can sufficiently dissolve the flame retardant by varying the type according to the type of the flame retardant, and the dispersion may be a flame retardant solvent. Can also be used.

The ceramic powder, clay, pore-forming agent, binder, or flame retardant as described above may be mixed and added to the dispersion at the same time, and may be mixed by sequentially separating and input at regular intervals. In particular, the mixing of the components is a mixture of ceramic powder, clay, pore-forming agent, inorganic binder (mix only when using inorganic binder), or flame retardant in the dispersion, and then mixing the organic binder in the mixture for convenience of mixing Even better.

Mixing time of the mixture is preferably carried out for 1 to 10 hours.

The slurry mixed as described above may be further aged for 1 hour or more for stabilization.

b) support

This step is to prepare a molding by supporting the slurry prepared in step a) on an activated carbon fiber nonwoven fabric or felt.

The activated carbon fiber nonwoven fabric or felt used in the present invention has a porous structure in which the slurry can be supported, and the size thereof may vary depending on the size of the ceramic filter to be manufactured.

The activated carbon fiber may be activated carbon fiber prepared through the normal carbonization (including the activation process) and sintering process, as a specific example, the activated carbon fiber is a polymer fiber dissolved in an organic solvent and spinning It is manufactured by.

As the polymer fiber, cellulose fiber, phenol resin fiber, PAN fiber, or pitch may be used. In particular, it is preferable to use cellulose fiber.

As the organic solvent, any polymer capable of dissolving polymer fibers may be used, and in particular, it is preferable to use an organic solvent exhibiting solubility in tetrahydrofuran, pyridine, or the like.

The polymer fiber and the organic solvent are preferably mixed at a ratio of 0.1 to 0.5: 1 wt%, and when the ratio is within the above range, there is an advantage in that activation after carbonization is well performed.

The activated carbon fibers preferably have an average particle diameter of 40 GPa or less, a specific surface area of 700 to 2500 m 2 / g, more preferably an average particle diameter of 10 to 40 m 2, and a specific surface area of 700 to 1500 m 2 / g. It is good that it is short fiber.

The activated carbon fiber nonwoven fabric or felt can be used in accordance with the required thickness of the ceramic filter to be manufactured, of course, preferably in consideration of ease of manufacture, the thickness is preferably 0.5 to 50 mm.

The supported method of this step is to apply the slurry to the activated carbon fiber nonwoven fabric or felt, to immerse the activated carbon fiber nonwoven fabric or felt in the slurry, or to spray (spray) the slurry on the activated carbon fiber nonwoven fabric or felt. It can be used.

In addition, the activated elastic fiber nonwoven fabric or felt on which the slurry is supported may be variously molded in a desired form according to the purpose. In particular, the molding is more preferably carried out after pre-drying the activated elastic fiber nonwoven fabric or felt on which the slurry is supported, the pre-drying is preferably performed for 1 to 2 hours.

The molding is closely bonded to the activated carbon fiber non-woven fabric or felt in a forming tube of a round tube, a radial bending tube, or a square tube shape, and fixed by a clamp or the like to form a circular tube shape, a radial tube shape, or a square tube shape. can do. In particular, when manufacturing the ceramic filter of the radial bending tube shape by using the radial bending tube-shaped molding frame can be applied to the same where the circular tube is applied, while maximizing the filtering area has the advantage of increasing the filtering efficiency have.

In addition, in the case of closely bonding the activated carbon fiber nonwoven fabric or felt to the molding die, a demolding film may be added between the activated carbon fiber nonwoven fabric or the felt molding die in order to facilitate separation of the activated carbon fiber nonwoven fabric or the felt after drying. Can be. The release film may preferably be a resin film made of rubber, urethane resin, epoxy resin, or the like, or a paper film such as kraft paper.

c) drying

This step is a step of drying the activated carbon fiber nonwoven fabric or felt molding material supported on the slurry in step b). At this time, the drying serves to prevent the shape deformation of the molding during the safe sintering and sintering preparation and sintering process.

The drying may be carried out by a method such as natural drying, hot air drying, sunlight drying or shade drying, and in particular, the infrared drying may be performed to shorten the drying time and to prevent deformation and cracking of the activated carbon fiber nonwoven fabric or felt molding. It is preferable to carry out more than time.

d) sintering

This step is a step of sintering the activated carbon fiber nonwoven fabric or felt molding dried in step c) under a nitrogen (N ₂ ) atmosphere.

The sintering may be carried out by removing the forming mold of the dried activated carbon fiber nonwoven fabric or felt molding, putting it in a sintering furnace in a nitrogen (N ₂ ) atmosphere, and sintering at a constant temperature by raising the temperature of the sintering furnace to a sintering temperature.

In addition, the sintering is a processing step of making the body of the filter by cutting to the size of the ceramic filter to be manufactured; And a top cap having a lower cap and a chin support wing that fits to the outer diameter of the body is dried by supporting an activated carbon fiber nonwoven fabric or felt in a slurry, and the upper and lower caps are assembled with a ceramic adhesive to block the bottom, The upper part may be further sintered after further performing an assembly step of assembling in an open shape in the form of a wing.

The sintering may proceed with sintering by setting an appropriate sintering temperature according to the composition and ratio of the slurry, and in particular, the sintering may be 0.5 to room temperature to 500 ° C. so as to prevent deformation, crushing, and breakage of moldings that may occur during elevated temperature. It is preferable to raise the temperature at a rate of ˜3 ° C./min. In particular, at a temperature of 150 to 450 ° C., it is preferable to slowly increase the temperature at a rate of 0.5 to 1 ° C./min, and finally 900 to 1,500 ° C. depending on the composition of the ceramic powder. The temperature is raised to the sintering temperature of and maintained for 2 to 48 hours to complete the sintering.

The present invention may produce a single-layer ceramic filter having the same internal structure according to the manufacturing method as described above, and may also manufacture a ceramic filter including a layer having a different pore size therein according to the method described below. have.

The method of manufacturing a ceramic filter having a different pore size includes a method of forming a multilayer before sintering and a method of forming a second layer and sintering after sintering.

<Multi layer forming method before sintering>

c-1) Additional coating

In the manufacturing method of the ceramic filter, the second slurry is further applied to the inside or the outside of the activated carbon fiber nonwoven fabric or felt molding dried in the step c). In this case, the second slurry includes: i) 40 to 80 parts by weight of the ceramic powder, ii) 10 to 40 parts by weight of the pore-forming agent, i) 7 to 30 parts by weight of the binder, and i) 10 to 50 parts by weight of the dispersion.

The ceramic powder of i) used in the present invention may use the same components as the ceramic powder of i) in step a) in the method of manufacturing the ceramic filter.

Preferably, the ceramic powder is included in the slurry composition in an amount of 40 to 80 parts by weight, and when the content is within the above range, by forming fine pores outside or inside the forming layer, it is possible to reduce clogging inside the filter. In addition, the filter can be easily recycled.

The pore-forming agent of ii) used in the present invention may use the same components as the pore-forming agent of step i) of the ceramic filter manufacturing method.

The pore-forming agent is preferably included in 10 to 40 parts by weight in the slurry composition, if the content is in the above range has the effect that can be completely burned during sintering to effectively form pores of the ceramic filter.

The binder of i) used in the present invention may use the same components as the binder of i) of step a) in the method of manufacturing the ceramic filter.

The binder is preferably included in 7 to 30 parts by weight in the slurry composition, when the content is in the above range has the effect that the slurry can be effectively bonded to the molding.

The dispersion of iii) used in the present invention may use the same components as the dispersion of iii) of step a) in the method of manufacturing the ceramic filter.

The dispersion is preferably contained in 10 to 50 parts by weight in the slurry composition, when the content is in the above range can be effectively mixed with each component contained in the slurry, the slurry is effectively bonded to the molding to maintain the proper viscosity It can work.

The second slurry composed of the above components may further contain iii) clay as necessary.

The clay may use the same components as the clay of step ii) in the method of manufacturing the ceramic filter, the content of which is included in the slurry composition 10 to 40 parts by weight.

The second slurry comprising the above components is further coated inside or outside the activated carbon fiber nonwoven fabric or felt molding prior to the sintering of step d), and the additional coating is applied to the desired ceramic filter and the purpose required by each layer. As a matter of course, it can be repeated two or more times.

In addition, the slurry may further vary in content and thickness in order to vary the porosity of the surface layer, the strength of the surface layer, the viscosity of the slurry solution required for further application, or the functionality of the surface layer, depending on the use of the ceramic filter. Of course. In particular, the porosity and pore size may be adjusted by adjusting the content and particle size of the pore-forming agent.

The additional coating may be carried out by a method such as coating with a brush, a method of immersing the molding in a slurry, or a method of spraying using a spray or the like.

The additional coating of this step is to form a sintered layer containing no activated carbon fiber nonwoven fabric or felt to form a dense sintered layer on the surface to improve the strength of the ceramic filter, and at the same time, only with a pore or binder on the surface layer. As the pores are controlled, a surface layer having finer pores is formed, and dust collection is mainly performed on the surface, thereby reducing the clogging inside the filter, thereby facilitating recycling of the filter. There is an effect that is applicable and the surface roughness is improved compared to the sintered layer of the area including the activated carbon fiber nonwoven fabric or felt to facilitate further application.

c-2) drying

This step is a step of drying the activated carbon fiber nonwoven fabric or felt molded article is further coated with a second slurry in step c-1), the drying can be carried out in the same manner as step c) of the manufacturing method of the ceramic filter. have.

<Multilayer Formation after Sintering>

e) additional application

In the manufacturing method of the ceramic filter, the second slurry is further applied inside or outside of the sintered activated carbon fiber nonwoven fabric or felt molding of step d). In this case, the second slurry includes: i) 40 to 80 parts by weight of the ceramic powder, ii) 10 to 40 parts by weight of the pore-forming agent, i) 7 to 30 parts by weight of the binder, and i) 10 to 50 parts by weight of the dispersion.

The additional coating step may be carried out in the same manner as step c-1) of the method of manufacturing a ceramic filter to form a multilayer before sintering.

f) drying

This step is to dry the activated carbon fiber non-woven fabric or felt molded article further coated in step e), the drying is carried out in the same manner as step c-2) of the method of manufacturing a ceramic filter to form a multilayer before sintering can do.

g) sintering

This step is a step of sintering the activated carbon fiber nonwoven fabric or felt molding dried in step f), the sintering can be carried out in the same manner as step d) of the method of manufacturing a ceramic filter.

In addition, the manufacturing method of the additional coating after the sintering may be applied to the case of the additional coating before the sintering, as well as the case of not performing the additional coating before the sintering as described above. In addition, the method of further coating after the sintering may be repeatedly performed two or more times, and the additional coating may be performed two or more times before the second sintering by applying the method of the additional coating before the sintering before the second sintering after the sintering. .

The final ceramic filter manufactured according to the above method may be manufactured in various forms as shown in FIGS. 2 and 3. In addition, it can also be used as a ceramic filter of the extended length by bonding two or more ceramic filters with an adhesive. In this case, a pipe having a smaller size than the inner circumferential surface of the ceramic filter may be inserted between the ceramic filters.

The adhesive may of course use a conventional adhesive used in the art, and preferably a ceramic adhesive.

In the method of manufacturing a ceramic filter including activated carbon fibers according to the present invention, the activated carbon fibers can be easily provided in the pores of the ceramic filter, the porosity can be easily adjusted, the manufacturing cost is low, the shape change and the large size It is possible to manufacture a filter, and in the case of a manufacturing method including an additional coating, by forming a dense sintered layer on the inner or outer surface of the ceramic filter, the strength of the ceramic filter can be improved, and at the same time, finer pores can be obtained. Branches can form a surface layer to reduce the clogging inside the filter, it can be made easy to recycle the filter.

Hereinafter, preferred examples are provided to help understanding of the present invention, but the following examples are merely to illustrate the present invention, and the scope of the present invention is not limited to the following examples.

EXAMPLE

Example 1

50 parts by weight of water was added to the mixer, and 40 parts by weight of alumina (Al ₂ O ₃ ), 25 parts by weight of clay, 25 parts by weight of activated carbon, and 5 parts by weight of frit (VA950, Duklim) were mixed with an inorganic binder. . 5 parts by weight of water pool was added to the mixture by an organic binder, and then mixed in a mixer for 2 hours to prepare a slurry solution.

The prepared slurry solution was applied to an activated carbon fiber nonwoven fabric or felt having a size of 1000 mm × 1500 mm × 2 mm in thickness to sufficiently support the slurry solution prepared above.

Next, a mold made of a round tube form is made of PVC, and a release film is bonded to the surface of the mold, and then the activated carbon fiber nonwoven fabric or felt immersed in the slurry solution is wound in the form of a mold to activate the activated carbon fiber nonwoven fabric or felt. A molded article was prepared and hot air dried at a temperature of 30 to 90 ° C. for 1 to 20 hours.

After removing the mold and demolding film from the granulated dried activated carbon fiber nonwoven fabric or felt molding product, the activated carbon fiber nonwoven fabric or felt molding product was placed in an electric furnace to 3 ° C./min at room temperature to 150 ° C. under nitrogen (N ₂ ) atmosphere. It heated up at a speed | rate, it heated up slowly at the speed | rate of 0.5-1 degreeC / min to 150-450 degreeC, and it maintained at the temperature of 900-1,300 degreeC for 2 hours, and completed sintering.

The weight of the ceramic filter prepared as described above was reduced by 10-30% compared with before and after sintering, and it was confirmed that shrinkage of about 5-25% occurred. 2 and 3 are photographs showing the circular filter and the radial bending tube of the ceramic filter manufactured according to Example 1, respectively.

Example 2

Except for using 40 parts by weight of the bromide phosphate in the slurry composition in Example 1 was carried out in the same manner as in Example 1.

Example 3

25 parts by weight of water, 70 parts by weight of alumina (Al ₂ O ₃ ), 25 parts by weight of activated carbon, and a frit with a binder (VA950, Duklim Materials) in the interior and exterior of the activated carbon fiber nonwoven fabric or felt molded product dried in Example 1 The second slurry solution containing 5 parts by weight and 10 parts by weight of water pool is further coated with a brush and further applied, followed by hot air drying at a temperature of 30 to 90 ° C. for 1 hour, followed by sintering in the same manner as in Example 1 above. Was carried out.

Example 4

In Example 1, the second slurry solution prepared in Example 3 was additionally coated on the inside and the outside of the activated carbon fiber nonwoven fabric or felt molded article, and the coating was further applied at a temperature of 30 to 90 ° C. for 1 hour. After hot air drying, the dried activated carbon fiber non-woven fabric or felt molded product is put in an electric furnace in a nitrogen atmosphere, and the temperature is raised at a rate of 3 ° C./min from room temperature to 150 ° C., and at a speed of 0.5 to 1 ° C./min to 150 to 450 ° C. The temperature was slowly raised and maintained at a temperature of 900 to 1,300 ° C. for 2 hours to complete sintering.

The ceramic filter including the activated carbon fiber according to the present invention has the advantages of the ceramic filter having excellent heat resistance, chemical resistance, and abrasion resistance, and the adsorption area of the ceramic filter by providing the activated carbon fiber having a small particle diameter and a large specific surface area in the pores of the ceramic filter. Significantly increased, the adsorption and deodorization performance for harmful substances is improved, excellent sterilization effect against microorganisms, porosity control is easy, and can be reused by rapid desorption.

In addition, the method of manufacturing a ceramic filter including the activated carbon fiber according to the present invention can be easily equipped with the activated carbon fibers in the pores of the ceramic filter, porosity control is easy, manufacturing cost is low, the shape change and It is possible to manufacture a large filter, and in the case of a manufacturing method including an additional coating, by forming a dense sintered layer on the inner or outer surface of the ceramic filter, not only can improve the strength of the ceramic filter, but also finer pores. Forming a surface layer having a can reduce the clogging of the interior of the filter, it is possible to easily recycle the filter.

1 is a photograph showing the pore structure of the surface of the activated carbon fiber used in the ceramic filter of the present invention.

2 is a photograph of a round tube ceramic filter manufactured by one embodiment of a method of manufacturing a ceramic filter of the present invention.

Figure 3 is a photograph of a radial bending tube ceramic filter manufactured by one embodiment of a method of manufacturing a ceramic filter of the present invention.

Claims (11)

A ceramic filter, wherein the ceramic filter comprises activated carbon fibers provided in the pores of the ceramic filter. The method of claim 1, The activated carbon fibers are connected to each other in the form of a nonwoven fabric or felt ceramic filter comprising activated carbon fibers. The method of claim 1, Wherein the activated carbon fiber is prepared by dissolving cellulose fiber, phenol resin fiber, PAN fiber, or pitch in an organic solvent and spinning. The method of claim 1, A ceramic filter comprising activated carbon fibers having an average particle diameter of the activated carbon fibers of up to 40 mm 3 and short fibers having a specific surface area of 700 to 2500 m 2 / g. The method of claim 1, The activated carbon fiber nonwoven fabric or felt ceramic filter comprising activated carbon fibers containing 1 to 95% by volume relative to the ceramic filter. a) preparing a slurry based on ceramic powder; b) Activated carbon fiber nonwoven fabric or felt slurry prepared in step a)    Immersed in to prepare a molding; c) activated carbon fiber nonwoven fabric or felt loaded with slurry in step b)    Drying the molding; And d) the activated carbon fiber non-woven fabric or felt molding dried in step c) Sintering under nitrogen (N ₂ ) atmosphere Method of manufacturing a ceramic filter comprising an activated carbon fiber comprising a. The method of claim 6, Before step d) above c-1) a second inside or outside the activated carbon fiber nonwoven fabric or felt molding      Further coating the slurry; And c-2) Activated carbon fiber nonwoven coated with the second slurry in step c-1)      Drying the foam molding Manufacturing method of a ceramic filter comprising an activated carbon fiber further comprising. The method of claim 6, After step d) e) inside or outside the activated carbon fiber nonwoven fabric or felt molding    Adding a second slurry; f) activated carbon fiber nonwoven fabric further coated with a second slurry in step e);    Drying the felt molding; And g) the activated carbon fiber non-woven fabric or felt molding dried in step f)    Sintering step Method of manufacturing a ceramic filter comprising an activated carbon fiber comprising a. The method of claim 6, The slurry of step a) Iii) silicon carbide, alumina, silimite, kaolin, silica, titania,     In the group consisting of diatomaceous earth, blast furnace slag, waste foundry sand, and ash     25 to 60 parts by weight of the ceramic powder selected from one or more kinds; Ii) 10 to 40 parts by weight of clay; Iii) 5 to 40 parts by weight of pore-forming agent; Iii) 1 to 20 parts by weight of the binder; And Iii) 20 to 60 parts by weight of the dispersion Method of manufacturing a ceramic filter comprising an activated carbon fiber comprising a. The method of claim 9, The slurry is a method for producing a ceramic filter comprising activated carbon fibers further comprising 5 to 60 parts by weight of flame retardant iii) a slurry composition. The method of claim 6, The method of manufacturing a ceramic filter comprising the activated carbon fiber sintering step d) is to be heated at a rate of 0.5 to 1 ℃ / min at a temperature of 150 ~ 450 ℃.