KR20250035636A - A extrudesion carbonblock for removing a perfluorinated compounds and its manufacturing method - Google Patents

Abstract

The present invention provides an extruded carbon block for removing perfluorinated compounds and a method for manufacturing the same, comprising: a raw material adding step of adding raw materials including activated carbon, a binder, and at least one additive; a raw material drying step of drying the raw materials; a raw material mixing step of blending the raw materials; a mixing step of kneading the raw materials; and a molding step of molding the raw materials blended in the mixing step; wherein, in the raw material adding step, cellulose acetate having non-channel properties is added.

Description

{A EXTRUDESION CARBONBLOCK FOR REMOVING A PERFLUORINATED COMPOUNDS AND ITS MANUFACTURING METHOD}

The present invention relates to an extruded carbon block for removing perfluorinated compounds and a method for manufacturing the same.

In general, perfluorinated compounds are widely used in various industries including the semiconductor industry, and have been widely used as surfactants because they have both hydrophilic and hydrophobic properties, and are discharged through the water system and contained in wastewater in excessive concentrations. These compounds are not easily decomposed in the environment, so they remain for a long time, have a long half-life, so they accumulate in the body, and are easily found in areas where there is no source of generation through long-distance transport. Meanwhile, these compounds are also suspected as the cause of stillbirth and weight loss in fetuses due to their toxicity. Therefore, technologies for reducing perfluorinated compounds contained in such wastewater have been introduced, and for example, activated carbon and ion exchange resins are generally widely used. There is a need for continuous research on substances that can remove perfluorinated compounds in such wastewater and methods that can improve the performance of removing perfluorinated compounds.

Korean Patent Publication No. 10-2012-0045263

The present invention has been made to solve the above-mentioned technical problem, and the purpose of the present invention is to provide an extruded carbon block capable of effectively removing perfluorinated compounds by dispersing and mixing cellulose acetate so as to have non-channel properties and extruding the same, and a method for producing the same.

In addition, the present invention aims to provide an extruded carbon block and a method for manufacturing the same, which can prevent the occurrence of cracks or non-formation of carbon blocks by preheating cellulose acetate to evaporate moisture and lower the moisture content, then fixing the cellulose acetate by bonding it to a binder, and then mixing the raw materials.

In addition, the present invention aims to provide an extruded carbon block and a method for manufacturing the same, which can prevent deformation of cellulose acetate by molding the cellulose acetate at a temperature of 140°C or lower.

In addition, the present invention aims to provide an extruded carbon block and a method for manufacturing the same, which can improve cohesion between materials when manufacturing an extruded carbon block, including cellulose acetate.

One embodiment of the method for manufacturing an extruded carbon block for removing a perfluorinated compound according to the present invention is as follows.

A raw material adding step of adding raw material including activated carbon, a binder, and at least one additive;

Raw material mixing step for mixing the above raw materials;

Including a molding step for molding the raw materials mixed in the above raw material mixing step;

In the above raw material addition step, cellulose acetate can be added to have non-channel properties.

In one embodiment of the present invention, the raw material adding step may include a step of preheating the cellulose acetate to evaporate moisture and lower the moisture content.

In one embodiment of the present invention, the raw material adding step may be added after lowering the moisture content of the cellulose acetate and fixing it by bonding it to the binder.

In one embodiment of the present invention, the forming step can form the raw material at a temperature of 140°C or less.

이하일 수 있다.In one embodiment of the present invention, in the forming step, the internal temperature of the material is 140

It could be as follows.

In one embodiment of the present invention, in the forming step, the ambient temperature may be 200°C or lower.

In one embodiment of the present invention, in the forming step, the set temperature may be 200°C or less.

One embodiment of the extruded carbon block for removing perfluorinated compounds according to the present invention is:

Contains activated carbon, binder and additives;

It may contain cellulose acetate to provide non-channel properties.

In one embodiment of the present invention, the additive may include 30 wt% or less of cellulose acetate.

In one embodiment of the present invention, the additive may include 80 wt% or less of cellulose acetate.

In one embodiment of the present invention, the additive may include one of zeolite, iron oxide, titanium, silicon, manganese, silver, copper, zinc, ion exchange resin, mineral, calcium, and magnesium, and may include 30 wt% or less.

In one embodiment of the present invention, the cellulose acetate may be in the form of powder or granules.

In one embodiment of the present invention, the bulk density of the cellulose acetate may be 0.35 g/mL to 0.45 g/mL.

In one embodiment of the present invention, the powder form of the cellulose acetate may have a diameter of 10 μm to 200 μm.

In one embodiment of the present invention, the granular form of the cellulose acetate may have a diameter of 100 μm to 3,000 μm.

In one embodiment of the present invention, the activated carbon may comprise 90 wt% or less.

In one embodiment of the present invention, the binder may include 30 wt% or less of low-density polyethylene (LDPE).

The extruded carbon block for removing perfluorinated compounds and the method for manufacturing the same according to the present invention have the effect of effectively removing perfluorinated compounds by dispersing and mixing cellulose acetate in the extruded carbon block and adding it, thereby causing the cellulose acetate to be evenly distributed in the extruded carbon block and having non-channel properties.

In addition, the extruded carbon block for removing perfluorinated compounds according to the present invention and the method for manufacturing the same have the effect of preventing non-formation or cracking of the carbon block by pre-heating cellulose acetate to evaporate moisture to lower the moisture content, then fixing it by bonding it to a binder and then mixing the raw materials.

In addition, the extruded carbon block for removing perfluorinated compounds according to the present invention and the method for manufacturing the same have the effect of preventing deformation of cellulose acetate by molding cellulose acetate at a temperature of 140°C or lower.

In addition, the purpose of the extruded carbon block for removing perfluorinated compounds according to the present invention and the manufacturing method thereof is to provide an extruded carbon block including cellulose acetate and a manufacturing method thereof capable of improving cohesion between materials during the manufacturing of the extruded carbon block.

Figure 1 is a schematic diagram of an extruded carbon block according to one embodiment of the present invention.
Figure 2 is a SEM&EDS image of a powder-type cellulose acetate additive according to one embodiment of the present invention.
Figure 3 is a SEM&EDS image of a granular cellulose acetate additive according to one embodiment of the present invention.
Figure 4 is a graph analyzing the physical properties of a cellulose acetate additive according to one embodiment of the present invention.
Figure 5 is a graph showing a comparison of changes in carbon block perfluorinated compound removal performance depending on the presence or absence of addition of cellulose acetate additive according to one embodiment of the present invention.
Figure 6 is a flow chart showing a method for manufacturing an extruded carbon block for removing a perfluorinated compound according to one embodiment of the present invention.

Hereinafter, an example of an extruded carbon block for removing perfluorinated compounds according to the present invention and a method for manufacturing the same will be described in detail with reference to the attached drawings.

When adding reference signs to components of each drawing, it should be noted that the same components are given the same signs as much as possible even if they are shown on different drawings. In addition, when describing an embodiment of the present invention, if it is determined that a specific description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description is omitted.

In describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by these terms. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the art to which the present invention belongs. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant technology, and shall not be interpreted in an idealistic or overly formal sense, unless explicitly defined in this application.

FIG. 1 is a schematic diagram of an extruded carbon block according to an embodiment of the present invention, FIG. 2 is a SEM&EDS image of a powder-type cellulose acetate additive according to an embodiment of the present invention, FIG. 3 is a SEM&EDS image of a granular cellulose acetate additive according to an embodiment of the present invention, FIG. 4 is a graph analyzing the physical properties of a cellulose acetate additive according to an embodiment of the present invention, and FIG. 5 is a graph comparing changes in the perfluorinated compound removal performance of carbon blocks depending on the presence or absence of the addition of a cellulose acetate additive according to an embodiment of the present invention.

Referring to these drawings, an extruded carbon block (10) for removing perfluorinated compounds according to the present invention can be manufactured including activated carbon, a binder, and an additive.

Activated carbon is a material that plays a role in improving the taste of purified water, and while it generally shows low performance in adsorption of low boiling point components such as carbon monoxide and ammonia, it is known to have high nitrogen dioxide removal performance. In the case of activated carbon, activated carbon generally used in the manufacture of carbon blocks can be used. According to one embodiment of the present invention, the activated carbon is manufactured from raw materials such as wood, lignite, anthracite, and palm shells, and can be composed in a range of 90 wt% or less. When the activated carbon is 90 wt% or more, a problem may occur in the strength of the carbon block.

The binder may be made of, for example, polyolefin-based polyethylene (PE), and may optionally be made of low-density polyethylene (LDPE), high-density polyethylene (HDPE), ultra-high molecular weight polyethylene (UHMWPE), etc. According to one embodiment of the present invention, the binder may contain 30 wt% or less of low-density polyethylene (LDPE). When the weight of low-density polyethylene (LDPE) is 30 wt% or more, there is a disadvantage in that the manufacturing cost of the carbon block increases, and problems may also occur in the adsorption performance of the carbon block. The binder may contain at least one low-density polyethylene (LDPE) material, and may also be used by mixing with other types of low-density polyethylene (LDPE) materials.

The additive may include at least one additive according to the required function, and may be mixed and used in various weight ratios according to the user's purpose. According to one embodiment of the present invention, the lead removal material, zeolite, iron oxide, titanium, silicon, manganese, antibacterial (silver, copper, zinc, etc.), ion exchange resin, heavy metal removal additive of mineral (calcium, magnesium, etc.), and cellulose acetate may be included. More specifically, the lead removal material may include a ceramic adsorbent, and may include 30 wt% or less.

The additive for removing heavy metals may include any one of zeolite, iron oxide, titanium, silicon, manganese, silver, copper, zinc, ion exchange resin, minerals, calcium, and magnesium. In addition to the additives described above, an additive aimed at removing heavy metals may be included. In addition, if the heavy metal removing function is not required, the additive for removing heavy metals may be omitted.

The heavy metal removal efficiency can be improved by adding a heavy metal removal additive, and according to one embodiment of the present invention, the heavy metal removal additive can be included in an amount of 30 wt% or less.

Cellulose acetate is a corn-based adsorbent that can be useful in removing perfluorinated compounds. According to one embodiment of the present invention, cellulose acetate may be present in an amount of 80 wt% or less. More preferably, cellulose acetate may be present in an amount of 30 wt% or less. According to one embodiment of the present invention, when cellulose acetate is present in an amount of 30 wt% or more, the aesthetic performance and strength (formability) of the carbon block may be affected.

Additionally, the bulk density of the cellulose acetate can be 0.35 g/mL to 0.45 g/mL.

In addition to the additives described above, various substances may be added depending on the user's required functions.

Referring to FIGS. 2 and 3, cellulose acetate may be included in a powder or granule form. According to one embodiment of the present invention, the powder form may have a diameter of 10 μm to 200 μm, and the granule form may have a diameter of 100 μm to 3,000 μm.

부근에서 산화되어 중량이 감소하는 현상을 볼 수 있으며, 약 140

이상 에서 흡열 반응 및 중량이 감소하기 시작하는 현상을 볼 수 있다.Referring to Figure 4, the physical properties of the powder form and the granule form are shown, and as shown in Figure 4, about 300

You can see the phenomenon of weight loss due to oxidation in the vicinity, and it is about 140

Above, we can see the endothermic reaction and the phenomenon where the weight begins to decrease.

에서 셀룰로오스아세테이트(cellulose acetate)의 변형이 발생하고 300

부근에서는 산화되는 현상이 발생할 수 있다. 따라서, 본 발명의 일 실시예에 따르면, 변형 발생을 방지하기 위하여 셀룰로오스아세테이트(cellulose acetate)를 첨가제로 첨가할 경우, 셀룰로오스아세테이트를 140℃이하에서 사전 가열하여 수분을 증발시켜 수분 함량을 낮추고, 바인더에 접착시켜 고정한 후 다른 원료들과 혼합할 수 있다. 이러한 공정을 거쳐 열성형 시 수분 팽창으로 카본블록이 미성형 되거나 크랙이 발생되는 것을 방지할 수 있다.This phenomenon is 140

In cellulose acetate transformation occurs at 300

In the vicinity, oxidation may occur. Therefore, according to one embodiment of the present invention, when cellulose acetate is added as an additive to prevent deformation, the cellulose acetate may be preheated at 140°C or lower to evaporate moisture to lower the moisture content, and then fixed by bonding to a binder before mixing with other raw materials. Through this process, it is possible to prevent the carbon block from being formed unevenly or cracked due to moisture expansion during thermoforming.

Meanwhile, when cellulose acetate is used as a granular filler, a channeling effect occurs during the filtering process, and a fluid path is formed due to the channeling effect. When a fluid path is formed, the fluid moves only through the path formed during the filtering process, and a phenomenon may occur in which some of the fluid being filtered does not pass through the cellulose acetate. Therefore, when cellulose acetate is used as a granular filler, the removal efficiency of perfluorinated compounds may be significantly reduced, and the filtering effect may also be reduced.

In order to prevent this phenomenon, when an extruded carbon block (10) is formed using cellulose acetate as an additive as in one embodiment of the present invention, cellulose acetate is evenly distributed in the extruded carbon block (10), so that the surface area through which a fluid can pass through the cellulose acetate can be increased. That is, the extruded carbon block (10) manufactured by adding cellulose acetate can filter without being affected by the channeling effect. (This can be defined in the present invention as 'cellulose acetate has non-channeling properties.')

Therefore, when filtering is performed with an extruded carbon block (10) manufactured by adding cellulose acetate rather than a filter used for granular filling, the removal rate performance of perfluorinated compounds can be improved.

Referring to FIG. 5, it can be seen that the removal performance for perfluorinated compounds is improved by more than 10% at the same effective capacity compared to a general carbon block that does not use cellulose acetate as an additive. Therefore, when cellulose acetate is used in the manufacture of an extruded carbon block (10), the removal performance for perfluorinated compounds can be excellent. In addition, when an extruded carbon block (10) is manufactured including cellulose acetate, there is an effect of improving the cohesion between materials.

In the case of additives, additives such as ceramic powder, lead removal material, or arsenic removal material may be added as needed.

Referring to Fig. 6, a method for manufacturing an extruded carbon block for removing perfluorinated compounds is briefly described.

Referring to FIG. 6, a method for manufacturing an extruded carbon block according to one embodiment of the present invention may include a first step (S110) of adding raw materials, a second step (S120) of mixing raw materials, a third step (S130) of molding the raw materials, and a fourth step (S140) of completing a molded product.

First, raw materials are added (S110). In the first step of adding raw materials (S110), activated carbon, a binder, and an additive may be added. According to one embodiment of the present invention, 90 wt% or less of activated carbon may be included, and 30 wt% or less of ultra-high molecular weight polyethylene (UHMWPE) may be included as a binder. The additive may include at least one composition according to a required function, and may be mixed and used at various weight ratios according to the user's purpose. According to one embodiment of the present invention, any one of a lead removal material, zeolite, iron oxide, titanium, silicon, manganese, silver, copper, zinc, ion exchange resin, mineral, calcium, magnesium, and cellulose acetate may be included. More specifically, 30 wt% or less of cellulose acetate may be added as an additive. Here, the cellulose acetate may be in a powder form or a granular form. The first step (S110) of adding raw materials may include a step of preheating cellulose acetate at 140°C or lower to evaporate moisture, adhering it to a binder to fix it, and then mixing it with other raw materials, if cellulose acetate is added as an additive to prevent deformation of cellulose acetate. Through this step, it is possible to prevent the carbon block from being formed due to moisture expansion during thermoforming.

The lead removal material may include a ceramic adsorbent and may contain 30 wt% or less. In addition, the heavy metal removal efficiency may be improved by adding any one of zeolite, iron oxide, titanium, silicon, manganese, silver, copper, zinc, ion exchange resin, mineral, calcium, and magnesium as the heavy metal removal material. According to one embodiment of the present invention, the heavy metal removal material may contain 30 wt% or less. If heavy metal removal performance is not required, the heavy metal removal material may be omitted.

Next, mix the raw materials (S120).

Next, the mixed raw materials are molded (S130), and the molded product is completed (S140).

In the third step (S130) of molding the mixed raw material, if heated above a certain temperature, deformation of the cellulose acetate may occur. Therefore, according to one embodiment of the present invention, in order to prevent deformation of the cellulose acetate, the mixed raw material may be molded at a temperature of 140° C. or lower to manufacture an extruded carbon block (10).

In addition, in the third step (S130) of molding the mixed raw material, the internal temperature of the material may be 140°C, the ambient temperature may be 200°C or lower, and the set temperature may be 200°C or lower. Here, the internal temperature of the material may be the temperature inside the material during molding, and the ambient temperature may be the temperature around the material during molding, which may be the external temperature that the material comes into contact with. The set temperature may be a temperature that is mechanically set to mold the mixed raw material.

Above, the extruded carbon block composition for removing perfluorinated compounds according to the present invention and the extruded carbon block for removing perfluorinated compounds including the same have been described in detail with reference to the attached drawings. However, the embodiment of the present invention is not necessarily limited to the above-described embodiment, and it will be understood that various modifications and equivalent implementations are possible by those skilled in the art to which the present invention pertains. Therefore, the true scope of the present invention is defined by the claims set forth below.

10: Extruded carbon block

Claims (18)

A raw material adding step of adding raw material including activated carbon, a binder, and at least one additive;
A raw material mixing step for mixing the above raw materials;
Including a molding step of molding the raw materials mixed in the above raw material mixing step;
A method for manufacturing an extruded carbon block for removing perfluorinated compounds, wherein in the above raw material adding step, cellulose acetate is added to have non-channel properties.
In paragraph 1,
A method for manufacturing an extruded carbon block for removing perfluorinated compounds, wherein the above raw material adding step includes a step of pre-heating the cellulose acetate to evaporate moisture and lower the moisture content.
In the second paragraph,
The above raw material adding step is a method for manufacturing an extruded carbon block for removing a perfluorinated compound, including a step of lowering the moisture content of the cellulose acetate, fixing it by bonding it to the binder, and then adding it.
In paragraph 1,
The above molding step is a method for manufacturing an extruded carbon block for removing perfluorinated compounds by molding the raw material at a temperature of 140°C or lower.
In paragraph 4,
A method for manufacturing an extruded carbon block for removing perfluorinated compounds, wherein the temperature inside the material is 140°C or lower in the above molding step.
In paragraph 4,
A method for manufacturing an extruded carbon block for removing perfluorinated compounds, wherein the atmosphere temperature in the above molding step is 200°C or lower.
In paragraph 4,
A method for manufacturing an extruded carbon block for removing a perfluorinated compound, wherein in the above molding step, the set temperature is 200°C or lower.
Contains activated carbon, binder and additives;
The above additive is an extruded carbon block for removing perfluorinated compounds containing cellulose acetate to have non-channel properties.
In Article 8,
The above additive is an extruded carbon block for removing perfluorinated compounds containing 30 wt% or less of cellulose acetate.
In Article 8,
The above additive is a compressed carbon block for removing perfluorinated compounds containing 80 wt% or less of cellulose acetate.
In Article 8,
The above additive comprises one of zeolite, iron oxide, titanium, silicon, manganese, silver, copper, zinc, ion exchange resin, mineral, calcium, and magnesium, and comprises 30 wt% or less of extruded carbon block for removing perfluorinated compounds.
In Article 8,
The above cellulose acetate is an extruded carbon block in powder or granule form for removing perfluorinated compounds.
In Article 8,
An extruded carbon block for removing perfluorinated compounds, wherein the bulk density of the cellulose acetate is 0.35 g/mL to 0.45 g/mL.
In Article 12,
The powder form of the above cellulose acetate is an extruded carbon block for removing perfluorinated compounds having a diameter of 10 μm to 200 μm.
In Article 12,
The granular form of the above cellulose acetate is an extruded carbon block for removing perfluorinated compounds having a diameter of 100 μm to 3,000 μm.
In Article 8,
The above activated carbon is an extruded carbon block for removing perfluorinated compounds containing 90 wt% or less.
In Article 8,
The above binder is an extruded carbon block for removing perfluorinated compounds containing 30 wt% or less of low-density polyethylene (LDPE).
A water purifier comprising an extruded carbon block for removing perfluorinated compounds manufactured according to any one of claims 8 to 17.