KR20010103170A - Ceramic honeycomb rotor for adsorptive removal of volatile organic compound and its manufacturing method - Google Patents

Abstract

The present invention is an adsorption carrier for removing volatile organic compounds (VOCs) generated in paint manufacturing, automobile, ship painting, printing and dyeing processes such as toluene, benzene, MEK (methyl ethyl ketone) and MIBK (ethyl isobutyl ketone). The present invention relates to a ceramic sheet for adsorption, a honeycomb rotor using the same, and a manufacturing method thereof.

In the present invention, 0.01 to 2.0% by weight of an inorganic material is added to water based on the weight of water, and 0.1 to 15.0% by weight of a dispersant is added thereto to disperse uniformly to obtain a slurry, and 0.05 to 2.0% by weight of the slurry. And an adhesive and 0.01 to 1.0% by weight of a flocculant are added and mixed to obtain a final slurry, and the final slurry is dehydrated and pressed to prepare a ceramic sheet. In addition, the present invention is dried by drying the ceramic sheet, cut to the required size, and then some of the ceramic sheet is corrugated by the embossing roller, and the corrugated sheet and the flat sheet is bonded by an adhesive and laminated After manufacturing the honeycomb structure, the honeycomb structure is impregnated in a solution mixed with an adsorbent and dried again at 300 to 750 ° C. for 1 to 5 hours to prepare a ceramic sheet honeycomb rotor for adsorption concentration of volatile organic compounds. do.

The ceramic sheet and the ceramic sheet honeycomb rotor using the same according to the present invention are excellent in tensile strength and excellent in adsorption performance.

Description

Ceramic honeycomb rotor for adsorptive removal of volatile organic compound and its manufacturing method

The present invention relates to a ceramic sheet which effectively adsorbs volatile organic compounds generated in various industrial processes, and more particularly, to preparing a ceramic sheet containing inorganic fibers as a main raw material, and to converting the ceramic sheet into a corrugated sheet and forming a ceramic sheet. The present invention relates to a ceramic sheet honeycomb rotor (rotor) manufactured by manufacturing a honeycomb, and impregnated with an adsorbent for adsorbing a volatile organic compound on the ceramic sheet honeycomb.

Flue gas from industrial processes typically emits both particulate and gaseous pollutants, and volatile organic compounds (VOCs) are representative of gaseous pollutants.

In general, volatile organic compounds (VOCs) occur mainly in paint manufacturing, automobile, ship painting, printing, and dyeing processes. Entering the respiratory tract may cause disorders of major organs such as the central nervous system. Known as a dangerous substance that causes ozone.

As a method of concentrating and recovering volatile organic compounds, there are absorption, deep cooling, and adsorption methods. Rotary adsorption devices are widely used as an economical and convenient method. Rotary adsorption device is a device that adsorbs the adsorbed material by blowing air contaminated with volatile organic compounds while rotating the adsorbent, such as activated carbon or zeolite in the rotating body. In this case, in order to optimize the adsorption recovery efficiency of the volatile organic compounds, a method of manufacturing a non-combustible honeycomb and impregnating an adsorbent material on the surface thereof is used. Existing ceramic honeycomb carrier is manufactured by extrusion molding ceramic powder, but this method requires a costly extrusion molding device, there is a problem that consumes a lot of energy because high temperature baking is required. In addition, there are disadvantages in that it is difficult to produce a honeycomb carrier having a large honeycomb volume, a thin honeycomb wall, or a small honeycomb cell.

Another method is to prepare a adsorption rotor by placing zeolite or activated carbon pellets in a space of 8 to 16 equal parts, and recovering volatile organic compounds by using this method. The concentration of the adsorbed gas is discontinuous because the operation of adsorbing the volatile organic compound to the pellets and then returning to the next predetermined angle to adsorb the volatile organic compound is repeated. Therefore, this method has a disadvantage in that the concentration of the desorbed volatile organic compounds is not only constant, but the pressure loss is large due to the pellets filled in the scalloped space.

Therefore, the conventional ceramic sheet has a small tensile strength, so that it cannot rupture the tensile stress due to the compression of the embossing roller in the corrugation process using the embossing roller, and it is difficult to automate the corrugation process because the uniform waveform cannot be achieved. .

In addition, according to the prior art, when glass fibers are added, glass fibers cannot be sufficiently dispersed.

The present invention overcomes the limitations of the prior art and is excellent in adsorption performance, does not require high temperature firing, does not consume a large amount of energy, and also provides a ceramic sheet having excellent tensile strength and a honeycomb rotor using the same.

It is an object of the present invention to prepare a ceramic sheet having good moldability by using inorganic fibers such as glass fibers as the main raw material and adding other subsidiary materials, and to obtain a honeycomb structure using the ceramic sheet, which is mixed with an adsorbent and an inorganic binder. The present invention provides a honeycomb rotor for absorbing concentrated volatile organic compounds having excellent physical properties by impregnating a solution and baking at a low temperature, and a method of manufacturing the same.

1 is a manufacturing process flow chart of the present invention;

Figure 2 is a change in tensile strength of the ceramic sheet prepared in Example and Comparative Example.

In the present invention, 0.01 to 2.0% by weight of an inorganic material is added to water based on the weight of water, and 0.1 to 15.0% by weight of a dispersant is added thereto to disperse uniformly to obtain a slurry, and 0.05 to 2.0% by weight of the slurry. And an adhesive and 0.01 to 1.0% by weight of a flocculant are added and mixed to obtain a final slurry, and the final slurry is dehydrated and pressed to prepare a ceramic sheet.

In the present invention, the inorganic material is preferably inorganic fibers, especially alumina silicate fibers, glass fibers, sepiolites, silica fibers, alumina fibers, rock wool, potassium titanate fibers, carbon fibers, and the like. It can be used or mixed. If the inorganic material is 0.01% by weight or less, the fiber is insufficient and the moldability is deteriorated. If the inorganic material is 2.0% by weight or more, the ceramic sheet having a smooth surface state cannot be obtained, which is not preferable. Most preferred embodiments each use 0.2-1.2 wt% of alumina silicate fibers, 0.02-0.12 wt% of glass fibers, and 0.1-0.6 wt% of sepiolite.

In the present invention, the dispersant is used to disperse through sea island and beating work in order to control the physical properties of the inorganic material to facilitate the production of sheets, polyethylene glycol (PEG) and carboxymethyl cellulose Oz (carboxymethyl celluose, CMC) is most preferred, dispersants commonly used in the art may be used. These may also be used alone or in combination. If the dispersant is less than 0.1% by weight, the inorganic fibers are not bonded to the water, so it is not possible to obtain a ceramic sheet with uniform characteristics, which is not preferable.When the dispersant is 15.0% by weight or more, the viscosity of the slurry is excessively increased to dehydrate the vacuum. It is difficult and undesirable. The most preferable embodiment uses 0.5-5.0 weight% of polyethyleneglycols respectively, and 0.1-5.0 weight% of carboxymethyl cellulose.

In the present invention, the adhesive is used to maintain the dry strength by being bonded between the inorganic fibers during molding, polyvinyl acetate (polyvinyl acetate, PVA), polyvinyl alcohol, acrylic, vinyl acetate, ethylene vinyl acetate, Organic adhesives such as urea resin, melamine resin, carboxyl ethyl cellulose, polyamido epichlorohydrin and polyacrylamide, and inorganic adhesives such as silica sol, alumina sol and titania sol can be used individually or together. In this case, when the adhesive is used in an amount of 0.05 wt% or less, the amount of adhesive adhered between the fibers is insufficient, so that the tensile strength of the ceramic sheet is not preferable, and when the adhesive is used more than 2.0 wt%, the tensile strength of the ceramic sheet is excessive. The disadvantage is that it becomes large and difficult to waveform. The most preferable embodiment uses 0.05-0.5 weight% of polyvinylacetate, and 0.05-1.0 weight% of silica sol, respectively.

In the present invention, the above coagulant is used to form a state in which various inorganic substances and organic substances added are entangled with each other, and inorganic coagulants such as aluminum sulfate, iron sulfate, aluminum chloride, cationic starch, ethylene Organic coagulants, such as diamine, tetramethylenediamine, hexamethylenediamine, and polyvinylimidazole, can be used. If the coagulant is used at 0.01 wt% or less, it is not preferable because the cohesion between fibers is insufficient and the tensile strength is weak. On the other hand, when the coagulant is used at 1.0 wt% or more, the coagulant particles occupy pores between the fibers to impregnate the adsorbent. It is undesirable because it interferes with The most preferred embodiment uses 0.03-0.30% by weight of aluminium sulfate and 0.1-0.5% by weight of cationic starch, respectively.

In the present invention, the mixture slurry is supplied to a ceramic sheet manufacturing apparatus that is commonly used to produce a ceramic sheet through a process such as dehydration and compression. The mixture slurry according to the present invention can be molded into various forms by supplying to various types of molding apparatus according to the use of the final product.

According to the present invention, after the ceramic sheet is manufactured through the above process, the ceramic sheet is dried, cut into a required size, and some of the ceramic sheet is corrugated by an embossing roller, and the corrugated sheet is The flat sheet is bonded with an adhesive to produce a laminated honeycomb structure.

In the present invention, the drying process, the cutting process and the corrugation process may be performed by a conventional method. However, in the bonding and lamination process, the adhesives should be used alone or in combination. This is to make it compatible with the adhesive used in the manufacturing process of the slurry mixture.

The present invention also provides a ceramic sheet honeycomb rotor for adsorption concentration of volatile organic compounds using the honeycomb structure.

According to the present invention, after manufacturing the honeycomb structure, the honeycomb structure is impregnated in a solution mixed with an adsorbent and an inorganic binder, and dried again at 300 to 750 ° C. for 1 to 5 hours to adsorb volatile organic compounds. A concentrated ceramic sheet honeycomb rotor is manufactured. In the present invention, the adsorbent is most preferably activated carbon zeolite, but an adsorbent conventionally used in the art may be used. In the present invention, when the drying step is 300 ℃ or less is not preferable because the organic matter in the honeycomb rotor is not sufficiently removed, it is not preferable because the deformation of the rotor occurs at 750 ℃ or more. In addition, when the drying time is 1 hour or less, organic matter in the rotor is not sufficiently removed, and when the drying time is 5 hours or more, deformation of the rotor occurs.

The present invention also provides a ceramic sheet for the adsorption concentration of the volatile organic compound and a method for producing a honeycomb rotor using the ceramic sheet.

In the method of manufacturing the ceramic sheet honeycomb rotor according to the present invention, in preparing a ceramic sheet honeycomb rotor for volatile organic compound adsorption concentration,

a). A mixing step of loosening the bonding relationship between the inorganic materials and uniformly dissolving them in individual states while mixing 0.01 to 2.0% by weight of inorganic materials based on the weight of water and mixing with a stirrer;

b). A dispersion step of dispersing 0.1 to 15.0 wt% dispersant in the slurry to adjust the physical properties of the inorganic material and to disperse it through sea island and beating work;

c). When the inorganic material is sufficiently decomposed and solidified, 0.05 to 2.0 wt% of adhesive and 0.01 to 1.0 wt% of coagulant are continuously added to form an adhesive and a coagulant to maintain the dry strength of the slurry by adhering between inorganic fibers during molding. Process;

d). A molding step of supplying the slurry obtained in the above process to a ceramic sheet manufacturing apparatus and producing a ceramic sheet through a process such as dehydration and pressing;

e). The molded ceramic sheet is dried and cut to the required size, and then some of the ceramic sheet is corrugated by an embossing roller, and the corrugated sheet and the flat sheet are bonded and laminated using the above adhesive. A lamination step of forming a honeycomb structure by making a honeycomb structure;

f). The honeycomb structured body is impregnated with an impregnating solution in which an adsorbent is mixed and dispersed, dried, and then heat treated.

Hereinafter, a method of manufacturing a ceramic sheet honeycomb rotor according to the present invention will be described in detail by the accompanying [Fig. 1]. 1 is only disclosed based on the most preferred embodiments so that the technical idea of the present invention can be easily carried out by those skilled in the art, the scope of the present invention is not limited to the above drawings. Is self explanatory.

1 is a flow chart schematically showing the manufacturing process of the present invention, in which the inorganic fiber refers to a slurry-like inorganic fiber obtained by administering a dispersant to an inorganic material.

In the production method of the present invention, glass fibers, alumina silicate fibers, sepiolite, pulp, and the like are selected as inorganic materials for convenience of explanation, polystyrene glycol and carboxymethyl cellulose are selected as dispersants, and polyvinyl acetate is used as an adhesive. And silica sol are added, and cationic starch and aluminum sulfate are added as flocculants. However, it is apparent that the manufacturing method of the present invention is not limited to the above components.

First, the glass fiber is put into water using a stirring device with agitating wings, and the fiber is loosened, and polyethylene glycol and carboxymethyl cellulose are added to loosen the bonding force between the fibers to release the fiber lumps into individual fibers. .

Once the glass fibers have been sufficiently dissolved and beaten, the slurry is continuously stirred while adding alumina silicate fibers, sepiolite and pulp to ensure that the added inorganic fibers and organic fibers are well loosened in water. Polyvinylacetate and silica sol were added as binders to maintain sufficient strength when the slurry was molded and dried in a ceramic sheet, and cation as a coagulant to give high strength by intertwining fibrous and inorganic binders on the ceramic sheet manufacturing apparatus. Add starch and aluminum sulfate. The slurry is supplied to a ceramic sheet which is designed and manufactured in-house, and the ceramic sheet is manufactured by the process of dewatering and pressing the sheet. The ceramic sheet is dried, cut into the required size, corrugated using an embossing roller, and the flat sheet and corrugated sheet are bonded and laminated by using a binder blend of silica sol and polyvinylacetate. Make

The honeycomb structure is impregnated with a slurry composed of silica sol and zeolite, dried, and heat-treated at 300 to 750 ° C. to prepare a rotor for adsorption concentration of volatile organic compounds.

The following describes the present invention in detail by way of examples.

Example 1

To prepare a ceramic sheet, 22 g of glass fibers were placed in 10 kg of water, and 40 g of polyethylethylene glycol and 40 g of carboxymethyl cellulose were added thereto, followed by stirring until the glass fibers were sufficiently decomposed using a stirring apparatus.

Then, 100 g of alumina silicate fiber, 30 g of sepiolite, and 24 g of pulp were added, followed by stirring until the fibers were completely defrosted. In order to make the fibers adhere to each other on the molding apparatus, 80g of silica sol in aqueous solution and 40g of polyvinylacetate in aqueous solution were also added during stirring, and aluminum sulfate was added to make the materials added to the slurry have an agglomerated structure. 25 g and 15 g of cationic starch were added. This slurry was supplied to a sheet manufacturing apparatus at a constant speed to produce a ceramic sheet having a thickness of 0.2 mm through vacuum dehydration and compression dehydration.

Thereafter, the ceramic sheet was cut to a predetermined size, and the flat sheet and the corrugated sheet were bonded and laminated with a mixed binder in which a silica sol and polyvinylacetate were mixed at 50:50 to prepare a honeycomb structure.

The honeycomb structure was again impregnated with an impregnating solution in which silica sol and zeolite were dispersed well, and then low-temperature firing at 650 ° C. for 5 hours to prepare a rotor capable of selectively adsorbing and removing VOC from VOC-contaminated air.

Example 2

With the same composition as in Example 1, 48g of silica sol and 24g of aluminum sulfate were added, and the remaining conditions were performed in the same manner as in Example 1.

Example 3

The composition was the same as in Example 1, except that silica sol and aluminum sulfate were not added, and the remaining conditions were performed in the same manner as in Example 1.

Comparative example

In order to corrugate the ceramic sheet, the tensile strength of the ceramic sheet must be high. If the tensile strength of the ceramic sheet is low, the ceramic sheet will not be able to withstand the tensile stress of the corrugation roll to form the wave, but will rupture. In addition, it is difficult to maintain a constant rate at which the ceramic sheet advances between the corrugation rolls, and thus a uniform waveform cannot be obtained.

In Comparative Example, a ceramic sheet prepared using 240 g of alumina silicate fiber, 72 g of sepiolite and 24 g of pulp as the main raw material, 24 g of silica sol and 24 g of polyvinylacetate as binder, and 20 g of cationic starch and 25 g of aluminum sulfate as coagulant were used. Was prepared, and the remaining conditions were carried out in the same manner as in Example 1. Although the ceramic sheet produced by this method had good moldability, it was difficult to be corrugated using an automatic corrugating apparatus with a tensile strength of 8.5 kg / cm 2.

Table 1 shows the tensile strength of the ceramic sheet manufactured by the method of the above Examples and Comparative Examples measured by the Universal Testing Machine (model Hounsfield H5KS UTM).

Based on the above Table 1, it can be clearly seen that the ceramic sheet according to the present invention is much stronger than the strength of the ceramic sheet produced by the conventional method.

Figure 2 shows the raw material composition ratio and the resulting tensile strength of the ceramic sheet, the fact that the tensile strength was greatly increased when the glass fiber is added, the addition amount of silica sol as a binder is 60g, the aluminum sulfate used as a coagulant When the addition amount is 20g, it can be seen that the tensile strength of the ceramic sheet according to the present invention is 60kg / cm 2.

As described above, since the ceramic sheet according to the present invention has a very high tensile strength, it is possible to obtain a uniform shape without rupturing in the corrugation process by the embossing roller. Therefore, there is an effect that can be produced a secondary product of various forms using the ceramic sheet according to the present invention.

In addition, the present invention can manufacture a honeycomb structure of various forms by using the ceramic sheet excellent in tensile strength, and the adsorption of volatile organic compounds by impregnating the structure with zeolite or activated carbon with an inorganic binder at low temperature baking A concentrated honeycomb rotor can be produced. Since the honeycomb rotor according to the present invention has excellent durability and excellent adsorption performance, it can be effectively used in various industrial processes to discharge volatile organic compounds and other air pollutants.

Claims (12)

0.01 to 2.0% by weight of an inorganic material was added to water based on the weight of water, and 0.1 to 15.0% by weight of a dispersant was added thereto to disperse uniformly to obtain a slurry, and 0.05 to 2.0% by weight of the adhesive and 0.01 to 1.0% by weight of a flocculant is added and mixed to obtain a final slurry, the final slurry of the volatile organic compound adsorption concentrated ceramic sheet, characterized in that is produced by pressing. 0.01 to 2.0% by weight of an inorganic material was added to water based on the weight of water, and 0.1 to 15.0% by weight of a dispersant was added thereto to disperse uniformly to obtain a slurry, and 0.05 to 2.0% by weight of the adhesive and 0.01 to 1.0% by weight of flocculant is added and mixed to obtain a final slurry, the final slurry is dehydrated and pressed to produce a ceramic sheet, the ceramic sheet is dried, cut into required sizes, and then some ceramics therein. The sheet is corrugated by an embossing roller, and the corrugated sheet and the flat sheet are adhered with an adhesive to produce a laminated honeycomb structure, and then the honeycomb structure is impregnated into a solution mixed with an adsorbent, and again 300 Ceramic sheet honeycomb furnace for adsorption concentration of volatile organic compounds, characterized by drying for 1 to 5 hours at ~ 750 ℃ (Rotor). 3. The inorganic material according to claim 1 or 2, wherein the inorganic material is alumina silicate fiber, glass fiber, sepiolite, silica fiber, alumina fiber, rock wool, potassium titanate fiber, carbon fiber. The method of claim 1 or 2, wherein the dispersing agent is characterized in that the polyethylene glycol, carboxymethyl cellulose. The method of claim 1 or 2, wherein the adhesive is polyvinyl acetate, polyvinyl alcohol, acrylic, vinyl acetate, ethylene vinyl acetate, urea resin, melamine resin, carboxyl ethyl cellulose, polyamido epichlorohydrin, polyacrylamide , Silica sol, alumina sol, titania sol. The method of claim 1 or 2, wherein the flocculant is aluminum sulfate, iron sulfate, aluminum chloride, cationic starch, ethylenediamine, tetramethylenediamine, hexamethylenediamine, polyvinylimidazole. In the method for producing a ceramic sheet for making a honeycomb phase structure for removing volatile organic compounds, a). A mixing step of loosening the bonding relationship between the inorganic materials and uniformly dissolving them in individual states while mixing 0.01 to 2.0% by weight of inorganic materials based on the weight of water and mixing with a stirrer; b). A dispersion step of dispersing 0.1 to 15.0 wt% dispersant in the slurry to adjust the physical properties of the inorganic material and to disperse it through sea island and beating work; c). When the inorganic material is sufficiently decomposed and solidified, 0.05 to 2.0 wt% of adhesive and 0.01 to 1.0 wt% of coagulant are continuously added to form an adhesive and a coagulant to maintain the dry strength of the slurry by adhering between inorganic fibers during molding. Process; d). A molding step of supplying the slurry obtained in the above process to a ceramic sheet manufacturing apparatus and undergoing a process such as dewatering and pressing; Method characterized in that consisting of. In the method of manufacturing a ceramic sheet honeycomb rotor using a ceramic sheet honeycomb phase structure to remove volatile organic compounds, a). A mixing step of loosening the bonding relationship between the inorganic materials and uniformly dissolving them in individual states while mixing 0.01 to 2.0% by weight of inorganic materials based on the weight of water and mixing with a stirrer; b). A dispersion step of dispersing 0.1 to 15.0 wt% dispersant in the slurry to adjust the physical properties of the inorganic material and to disperse it through sea island and beating work; c). When the inorganic material is sufficiently decomposed and solidified, 0.05 to 2.0 wt% of adhesive and 0.01 to 1.0 wt% of coagulant are continuously added to form an adhesive and a coagulant to maintain the dry strength of the slurry by adhering between inorganic fibers during molding. Process; d). A molding step of supplying the slurry obtained in the above process to a ceramic sheet manufacturing apparatus and producing a ceramic sheet through a process such as dehydration and pressing; e). The molded ceramic sheet is dried and cut to the required size, and then some of the ceramic sheet is corrugated by an embossing roller, and the corrugated sheet and the flat sheet are bonded and laminated using the above adhesive. A lamination step of forming a honeycomb structure by forming a honeycomb structure; f). Impregnating and drying the honeycomb structured body in the impregnation liquid in which the adsorbent and the inorganic binder are mixed and dispersed; Method characterized in that consisting of. The method according to claim 7 or 8, wherein the inorganic material is alumina silicate fiber, glass fiber, sepiolite, silica fiber, alumina fiber, rock wool, potassium titanate fiber, carbon fiber. The method of claim 7 or 8, wherein the dispersant is polyethylene glycol, carboxymethyl cellulose. The method of claim 7 or 8, wherein the adhesive is polyvinyl acetate, polyvinyl alcohol, acrylic, vinyl acetate, ethylene vinyl acetate, urea resin, melamine resin, carboxyl ethyl cellulose, polyamido epichlorohydrin, polyacrylamide , Silica sol, alumina sol, titania sol. The method of claim 7 or 8, wherein the flocculant is aluminum sulfate, iron sulfate, aluminum chloride, cationic starch, ethylenediamine, tetramethylenediamine, hexamethylenediamine, polyvinylimidazole.