KR20210001727A - Adsorber system for removing volatility organic compound - Google Patents

Abstract

The present invention includes: a core disposed inside and including a carbon-based material; and a shell having an adsorption function and disposed to surround the core, wherein the shell includes zeolite particles, a solid binder mixed with the zeolite particles, and a liquid binder mixed with the zeolite particles and the solid binder. The present invention has the advantage of being easy to manufacture and not generating dust during use and manufacture.

Description

Adsorbent and volatile organic compound removal system containing the same {ADSORBER SYSTEM FOR REMOVING VOLATILITY ORGANIC COMPOUND}

The present invention relates to an adsorbent for adsorbing gas containing harmful components generated in multi-use facilities, event halls, various manufacturing processes and automobile painting processes, and a volatile organic compound removal system including the same.

As interest in the air environment increases due to the improvement of the quality of life, the emission of air pollutants such as volatile organic compounds (VOC) generated in various industrial processes, painting facilities, sewage treatment plants, or incineration plants is suppressed. Regulations are being revised, and strong administrative measures such as suspension of operations are being enforced against companies that violate them. Accordingly, many studies have been conducted to remove such volatile organic compounds. Conventional techniques for removing volatile organic compounds include adsorption tower systems using activated carbon, concentration systems, regenerative catalytic oxidation (RCO), or regenerative thermal oxidation (RTO). However, when the adsorption tower is used, there is a problem in that periodic replacement is required and maintenance cost increases, and in the case of a concentration system or a catalyst and heat source oxidation method, energy efficiency is low.

In order to solve the above-described problems of the prior art, a technique for removing volatile organic compounds using microwaves has recently been developed. Specifically, the technology for removing volatile organic compounds using microwaves is to remove the volatile organic compounds by adsorbing them on the adsorbent and then desorbing them, and since regeneration through adsorption and desorption is possible, the adsorbent can be used semi-permanently. In order to maximize the efficiency of such a technology for removing volatile organic compounds using microwaves, an adsorbent having high adsorption power for organic compounds to be removed and for absorbing microwaves irradiated to the adsorbent during desorption is required.

Meanwhile, as energy demand increases rapidly every year and the importance of technology that requires a lot of energy at the same time emerges, the energy problem has emerged as an ultra-fine concern of all countries in the world. In particular, the rotor-type dehumidification system used in semiconductor and LCD processes is a representative technology of high energy consumption, and in order to solve this energy problem, development of a low consumption type dehumidification system that can increase energy efficiency using microwaves is being attempted. . In addition, the dehumidification system using microwaves is required to develop an adsorbent having excellent absorption power for both moisture and microwave irradiated to the adsorbent for regeneration, which can further improve energy efficiency.

1 is a view showing a conventional adsorbent known in Korean Patent No. 10-1549359.

In a conventional adsorbent, a silicon carbide bead 210 forms a core, a shell 110 is disposed in a form surrounding the silicon carbide bead 210, and the silicon carbide particles 230 are dispersed and arranged in the shell 110 Have.

In the case of the prior art, in the process of dispersing the silicon carbide particles 230 in the shell 110, some of the silicon carbide particles 230 are exposed to the surface of the shell 110 (the surface of the shell). Since the silicon carbide particles 230 exposed to the surface of the shell have no adsorption power, there is a problem of reducing the adsorption area of the adsorbent and lowering the adsorption performance of the adsorbent.

In addition, in the case of the prior art, in order to disperse particles of the silicon carbide particles 230 in the shell 110, if the thickness of the shell 110 is made too thin, there are many silicon carbide particles 230 exposed to the surface of the shell. When the thickness of the shell 110 becomes too thick, the silicon carbide particles 230 exposed to the surface of the shell decrease, but the thickness of the shell increases, thereby increasing the weight of the adsorbent and placing it close to the core. There is a problem in that the resulting shell does not have an adsorption function.

In addition, in the case of the prior art, since the silicon carbide beads 210 and the silicon carbide particles 230 used as cores have high density, the weight is increased relative to the same volume, which hinders weight reduction of the adsorbent, and the specific heat of the silicon carbide is high, There is a disadvantage of high energy consumption for heating the adsorbent.

In addition, in the case of the shell of the prior art, there is a problem that dust is generated on the shell surface during manufacture, and the dust-generating adsorbent is difficult to apply in a clean room. In particular, it is necessary to minimize dust of adsorption material for clean room application in semiconductor/display process.

The problem to be solved by the present invention is to adsorb and remove volatile organic compounds (hereinafter referred to as VOCs) generated in industrial sites, and to regenerate the adsorbent by desorption of the VOC concentrated in the adsorbent, and the desorbed VOC can be decomposed using a catalyst. It is to provide a volatile organic compound removal system.

Another problem to be solved by the present invention is to provide an adsorbent that increases the adsorption efficiency of VOCs, saves energy during desorption of VOCs, enables weight reduction, and reduces dust.

The problems of the present invention are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the adsorbent according to an embodiment of the present invention is disposed therein, and includes a core comprising a carbon-based material; And a shell having an adsorption function disposed to surround the core. Including, the shell, zeolite particles, a solid binder mixed with the zeolite particles, and a liquid binder mixed with the zeolite particles and the solid binder.

The solid binder is an adsorbent comprising one of beamite, kaolinite, and bentonite.

The liquid binder may include at least one of a silica sol and an alumina sol.

The liquid binder may include a silica sol and an alumina sol.

The silica sol may be included in an amount of 45% to 55% by weight based on 100% by weight of the zeolite.

The alumina sol may be included in an amount of 45% to 55% by weight based on 100% by weight of the zeolite.

The solid binder may be included in an amount of 10% to 20% by weight based on 100% by weight of the zeolite.

The core may include at least one of activated carbon, graphene, graphite carbon black, and impregnated activated carbon.

In addition, the present invention may further include dispersed particles having a diameter smaller than that of the core and dispersed and disposed in the core.

The diameter of the core may be 100 microns to 300 microns.

The ratio of the diameter of the core and the thickness of the shell may be 1:1 to 1:3.

The dispersed particles may contain a material different from the core.

The dispersed particles may contain 0.1% to 10% by weight based on 100% by weight of the core.

The dispersed particles may include a dielectric.

Details of other embodiments are included in the detailed description and drawings.

According to the adsorbent of the present invention, one or more of the following effects are provided.

First, 　 the present invention has the advantage that it is easy to manufacture, and does not generate dust during use and during manufacture.

Second, the adsorbent of the present invention can reduce its weight while securing the same adsorption area, thereby reducing energy driving the rotating cartridge.

Third, the adsorbent of the present invention has the advantage of being able to rapidly increase the temperature to the desorption temperature using microwaves.

Fourth, since the core of the present invention has a low density, the specific heat relative to the same mass is low, so that energy is saved in raising the temperature of the adsorbent, and the heat of the core is high, so that heat from the core can be quickly transferred to the shell.

The effects of the present invention are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a view showing an apparatus for removing volatile organic compounds according to the prior art.
2 is a conceptual diagram of a system for removing volatile organic compounds according to an embodiment of the present invention.
3 is a cross-sectional view of a system for removing volatile organic compounds according to an embodiment of the present invention as viewed from above.
4 is a side cross-sectional view of the system for removing volatile organic compounds shown in FIG. 3.
5 is a cross-sectional view of the other side of the volatile organic compound removal system shown in FIG. 3.
6 is a view showing a rotating cartridge according to an embodiment of the present invention.
7 is a cross-sectional view taken along line AA of FIG. 6.
8 is a view showing the absorbent according to an embodiment of the present invention.
9 is a view showing an absorbent according to another embodiment of the present invention.
10 is a view showing heat transfer of the absorbent agent shown in FIG. 9.
11 is data obtained by experimenting heating by microwaves of Examples and Comparative Examples of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and are common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

In the drawings, the thickness or size of each component is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. Also, the size and area of each component do not fully reflect the actual size or area.

In addition, angles and directions mentioned in the process of describing the structure of the present invention are based on those described in the drawings. In the description of the structure in the specification, when the reference point and the positional relationship with respect to the angle are not clearly mentioned, reference will be made to the related drawings.

2 is a conceptual diagram of a volatile organic compound removal system 1 according to an embodiment of the present invention, FIG. 3 is a cross-sectional view as viewed from the top of the volatile organic compound removal system 1 according to an embodiment of the present invention, and FIG. 4 is One side cross-sectional view of the volatile organic compound removal system 1 shown in FIG. 3, and FIG. 5 is a cross-sectional view of the other side of the volatile organic compound removal system 1 shown in FIG. 3.

2 to 5, the volatile organic compound removal system 1 according to an embodiment of the present invention receives exhaust gas containing harmful components such as VOC, and absorbs harmful components contained in the exhaust gas by an adsorbent 71 ), and then discharge the purified gas.

For example, the volatile organic compound removal system 1 according to an embodiment includes adsorption modules 10 and 12 receiving exhaust gas containing harmful components such as VOC, and an adsorption function capable of adsorbing harmful components and heat storage. The adsorbent 71 having a function at the same time, the rotating cartridge 20 having a plurality of storage sectors (20a) that is divided into a plurality of areas to accommodate the adsorbent 71, and the harmful components adsorbed from the adsorbent 71 are desorbed and flowed. It includes a detachable module and a driving unit for rotating the rotating cartridge 20.

The volatile organic compound removal system 1 according to an embodiment may further include a microwave, a catalyst module 60, and a cooling means.

The adsorption modules 10 and 12 are connected to a pollutant source to supply exhaust gas, and a space for removing harmful components from the exhaust gas is disposed therein.

For example, it is connected to the exhaust gas inlet passage 12 and the exhaust gas inlet passage 12 connected to a pollutant source that discharges exhaust gas, and supplied through the exhaust gas inlet passage 12, and a rotating cartridge 20 therein It may include an adsorption duct 10 positioned. The adsorption duct 10 is connected to a purification gas discharge passage 13 through which the purification gas from which harmful components are removed from the adsorption duct 10 is discharged. The adsorption modules 10 and 12 are provided with a main fan 14 to provide a flow force to the exhaust gas.

The adsorption duct 10 is a space in which the rotating cartridge 20 is accommodated and harmful components are adsorbed by the adsorbent 71 of the rotating cartridge 20. The adsorbent 71 may be selected and used of a material having both an adsorption function and a heat storage function capable of adsorbing harmful components. The adsorbent 71 may be formed in a network-like structure or a certain shape (corresponding to the storage section) and then placed in the storage sector 20a in the form of an adsorption cartridge. The adsorbent 71 will be described in detail below in FIG. 9.

The desorption module is a passage through which harmful components are desorbed from the adsorbent 71 to which the harmful components are adsorbed, and the concentrated gas in which the harmful components are concentrated flows. The detachable module may be connected to at least one storage sector 20a of the rotating cartridge 20. For example, the detachable module further includes a detachable duct 30 formed to correspond to at least one storage sector 20a, and is in contact with the boundary of the storage sector 20a to isolate the storage sector 20a.

When viewed from the top, the detachable duct 30 has a sector shape corresponding to the storage sector 20a, and is formed to isolate at least one to preferably two storage sectors 20a from the outside. Specifically, the detachable duct 30 includes an upper detachable duct 310 sealing the upper part of the storage sector 20a and a lower detachable duct 320 sealing the lower part. The upper detachable duct 310 is in close contact with the upper surface of the storage sector 20a, and the lower detachable duct 320 is in close contact with the lower surface of the storage sector 20a. Of course, the upper detachable duct 310 and the lower detachable duct 320 may further include packing made of a flexible material to enhance sealing force.

The desorption duct 30 is located inside the adsorption duct 10 and is in contact with the boundary of at least one storage sector 20a to seal between the adsorption duct 10 and the inside of the desorption duct 30. Of course, since the detachable duct 30 has a structure that moves up and down, it may be opened or closed. When the desorption duct 30 is disposed inside the adsorption duct 10, there is an advantage of saving space in the system.

The desorption module may be connected to the catalyst module 60 for removing harmful components of the desorption gas. Specifically, the desorption module is connected to the desorption duct 30 on one side, the other side is connected to the catalyst module 60 to provide the desorbed gas to the catalyst module 60, a first circulation passage 32, and one side The second circulation passage 31 is connected to the catalyst module 60 and the other side is connected to the desorption duct 30 so that a part of the air from which the harmful components have been removed from the catalyst module 60 is supplied back to the desorption duct 30 And, it may further include a discharge passage 33 is connected to the catalyst module 60 is discharged to the outside of the air from which harmful components have been removed.

Air supplied through the second circulation passage 31 may receive heat from the catalyst module 60 or may receive heat from a cooling means to be described later in order to save desorption energy.

It is preferable that the amount of air supplied through the desorption module is smaller than the amount of air supplied through the adsorption modules 10 and 12. In general, 1/5 to 1/20 are preferred. At this time, the desorption time and method must be properly devised so that there is no loss of energy stored in the adsorbent 71 during desorption. Specifically, the size of the desorption duct 30 is smaller than the adsorption duct 10, the desorption duct 30 has a size corresponding to 1 to 2 storage sectors 20a, and the adsorption duct 10 has 10 It has a size corresponding to to 40 storage sectors (20a).

The adsorbent 71 in the desorption duct 30 is desorbed using temperature, pressure, light energy or sound wave energy. Preferably, the desorption in the desorption module may be performed by heating the adsorbent 71 in a microwave. The embodiment further includes a microwave generator 50 for supplying microwaves to the adsorbent 71 in the desorption duct 30.

The microwave generator 50 may be disposed inside or outside the adsorption duct 10.

The catalyst module 60 decomposes harmful components concentrated in the air supplied from the desorption module. The decomposed harmful components are discharged to the outside by a separate device. Air from which harmful components are removed from the catalyst module 60 may be circulated again and supplied to the inside of the desorption duct 30.

To reduce energy by utilizing waste heat and to effectively desorption and decompose harmful components, the catalyst module 60 heats the air supplied from the desorption module, decomposes harmful components, and desorbs heat from the air in which the harmful components have been decomposed. It can be delivered to the adsorbent 71 in the module. In addition, the catalytic module 60 may reduce heat provided to the catalytic reaction by transferring heat of air from which harmful components are decomposed to the concentrated gas discharged from the desorption module.

Specifically, the catalyst module 60 may include a catalyst cartridge 62, heat exchangers 63 and 65, a circulation fan 64, and a heater 61.

The catalyst cartridge 62 oxidizes and decomposes harmful components, and may be selected from zeolite, alumina (Al2O3), activated carbon, and mixed oxide metal. The catalyst cartridge 62 may be an oxide-like molded body capable of oxidizing harmful components.

The heater 61 heats the concentrated gas supplied from the desorption module to the catalyst module. Heater 61 may be used a variety of heating means.

The heat exchangers 63 and 65 heat exchange the concentrated gas supplied from the desorption duct 30 and the air passing through the catalyst cartridge 62 with each other. The first heat exchanger (63, 65) heats the concentrated gas by using waste heat of air before being discharged to the outside. Accordingly, the first heat exchanger 63 and 65 can reduce energy for heating the concentrated gas.

In addition, the heat exchangers 63 and 65 may exchange heat between the air passing through the catalyst cartridge 62 and the air supplied into the desorption duct 30 with each other. A plurality of heat exchangers 63 and 65 may be provided.

Part of the air that has passed through the heat exchangers 63 and 65 is discharged to the outside through the discharge passage 33, or another part flows back to the adsorption duct 10 through the second circulation passage 31.

The circulation fan 64 provides a flow force to the air flowing through the desorption module and the catalyst module 60.

The cooling means cools the adsorbent 71 heated in the desorption module. In the case of the heated adsorbent 71, since it is difficult for harmful components to be adsorbed in the exhaust gas, external air may be supplied from the cooling means to cool.

The cooling means may have various configurations for supplying external air to the adsorbent 71 from which harmful components are desorbed. In addition, the cooling means may be configured such that cooling air cooled by the adsorbent 71 from which harmful components are desorbed is directly discharged to the outside or discharged to the outside through the catalyst module 60.

Outflow air discharged from the cooling means is heat-exchanged with air supplied into the desorption duct 30, and is supplied to transfer heat to the adsorbent 71.

The cooling means may have a separate cooling space accommodating the storage sector 20a, or may be connected to the detachable duct 30 and not have a separate cooling space as in the embodiment.

Specifically, the cooling means is connected to the outside air flow path 41, one side is connected to the external air and the other side is connected to the detachable duct 30, one side is connected to the detachable duct 30, and the other side is connected to the catalyst module 60. It includes a cooling flow path 42.

The cooling passage 42 and the outside air passage 41 are disposed in front of the first and second circulation passages 31 in the rotation direction of the rotary cartridge 20. Accordingly, the adsorbent 71 on which the desorption is completed can be effectively cooled.

In addition, isolation valves 71, 72, and 73 for controlling the flow of air may be disposed in each flow path. Specifically, isolation valves 71, 72 and 73 are disposed in the adsorption modules 10 and 12, the desorption module and the cooling passage 42, respectively. These shut-off valves 71, 72, 73 may be closed when the rotary cartridge 20 rotates and open when stopped.

Hereinafter, the structure and operation of the rotating cartridge 20 will be described in detail.

6 is a view showing the rotating cartridge 20 according to an embodiment of the present invention, FIG. 7 is a cross-sectional view taken along line A-A of FIG.

2 to 7, the rotary cartridge 20 is configured to be rotatable, so that the adsorbent 71 stored in each of the plurality of storage sectors 20a circulates through the adsorption modules 10 and 12 and the desorption module. .

The rotary cartridge 20 has a plurality of storage sectors 20a that are divided into a plurality of regions to accommodate the adsorbent 71. For example, the rotating cartridge 20 may include a rotating shaft 23, a main body 21, and a plurality of partition walls 22.

The rotation shaft 23 transmits the driving force of the driving unit. The rotation shaft 23 is connected to the driving unit.

The main body 21 has a structure in which air is introduced and adsorbed and discharged by the adsorbent 71. The main body 21 has a space for accommodating the adsorbent 71 cartridge therein. The main body 21 has an air inlet 24 through which air is introduced, and an air outlet 25 through which air is discharged. The air inlet 24 and the air outlet 25 of the main body 21 may have a completely open shape, but in order to prevent separation of the adsorption cartridge 70 stored in the main body 21, a mesh structure is used. It is desirable to have.

The shape of the main body 21 is preferably a cylindrical shape with the rotation shaft 23 of the rotation cartridge 20 as a central axis. This is because the shape of the storage sector 20a does not change even when the rotating cartridge 20 rotates, so that it is easy to seal it with the detachable duct 30.

The plurality of partition walls 22 divide the inner space of the main body 21 into a plurality of storage sectors 20a. The plurality of partition walls 22 extend radially from the rotation shaft 23 of the rotation cartridge 20 and are connected to the main body 21. That is, the plurality of partition walls 22 have a shape extending radially from the rotation shaft 23 of the rotation cartridge 20.

When the shape and size of each storage sector (20a) are different from each other, when the rotation cartridge (20) is rotated, each storage sector (20a) cannot be sealed with the detachable duct (30), making it difficult to remove and remove harmful components. It is preferable that the storage sectors 20a have the same shape.

Specifically, each storage sector (20a) is an arc (partial area of the main body 21) that connects the two strings (partition walls 22) and the two strings formed around the rotation shaft 23 of the rotation cartridge 20 It has a fan shape defined by ). At this time, the fan angles θ of the plurality of storage sectors 20a are formed equal to each other. The plurality of storage sectors 20a may be sealed so that air does not pass through each other.

In addition, a window through which microwaves pass may be formed in the body 21. The window may have a mesh structure and may be provided in each storage sector 20a.

A plurality of rotation cartridges 20 may be stacked and disposed along the flow direction of the exhaust gas. Of course, the types of the adsorbent 71 to be filled in the plurality of rotating cartridges 20 may be different from each other.

The driving unit (not shown) is a rotating cartridge 20 so that the plurality of storage sectors 20a move in the order of the adsorption modules 10 and 12 through which harmful components are supplied, and the desorption modules in which the harmful components adsorbed by the adsorbent 71 are desorbed and flowed. ) To rotate. 3, the driving unit rotates the rotating cartridge 20 counterclockwise and stops it.

The drive unit rotates the rotary cartridge 20 by a predetermined rotation angle and then rotates to stop for a predetermined time. In this case, the predetermined rotation angle is preferably the same as the sector angle of each storage sector (20a). While the rotary cartridge 20 is stopped, harmful components are adsorbed from the adsorbent 71 in the adsorption duct 10, and the harmful components are desorbed from the adsorbent 71 in the desorption duct 30.

The drive unit rotates the rotation cartridge 20 so that each storage sector 20a circulates the adsorption duct 10 and the detachable duct 30, and the boundary of each storage sector 20a and the detachable duct 30 correspond to each other. By stopping the rotating cartridge 20 in the position, some storage sectors (20a) are separated from the adsorption duct (10) inside the detachable duct (30).

Although not shown in the drawings, a control unit for controlling the overall operation of the volatile organic compound removal system may be further included. The control unit may control the driving unit and each of the control valves 71, 72, and 73.

The control unit may close each of the control valves 71, 72 and 73 while the drive unit is operating, and open each of the control valves 71, 72, 73 while the drive unit is stopped.

8 is a view showing the absorbent according to an embodiment of the present invention.

The adsorbent 71 according to the present invention has a core 711 disposed inside and an adsorption function disposed to surround the core 711 to improve adsorption performance while absorbing energy-efficient microwaves. It includes a shell 713.

The core 711 is disposed inside, and a material having a heat storage function is selected. The adsorption performance of the adsorbent 71 is proportional to the surface area of the shell 713, when the density of the core 711 is too high, when the size of the core 711 is increased to increase the surface area of the shell 713 , There is a problem that the weight of the adsorbent 71 increases.

Accordingly, the core 711 of the embodiment has a low density and includes a carbon-based material capable of absorbing microwaves and generating heat. For example, in the core 711, the core 711 may be at least one of activated carbon, graphene, graphite carbon black, and impregnated activated carbon, or a mixture thereof. In particular, since the carbon-based core 711 of the present invention has a smaller density than silicon carbide of the prior art, while securing the same adsorption area as in the prior art, it has less weight. Accordingly, it is possible to reduce the weight of the volatile organic compound removal system. The carbon-based core 711 of the present invention has superior microwave absorption performance than that of silicon carbide of the prior art, so that the adsorbent can be rapidly heated to a desorption temperature. Experimental data for this will be described later in FIG. 11.

The shell 713 is in contact with the outer surface of the core 711. When the core 711 has low thermal conductivity, it is difficult to effectively transfer heat generated from the core 711 to the shell 713. Since the core 711 of the present invention uses carbon-based graphene having excellent thermal conductivity, the heat of the core 711 is quickly transferred to the shell 713, and the temperature is raised to the desorption temperature by absorbing the microwave. It has the advantage of saving time.

According to an embodiment, the density of the core 711 may be smaller than the density of the dispersed particles 712 or/and the shell 713. Since the volume occupied by the core 711 in the adsorbent 71 is the largest, a material having a density of the core 711 less than that of the dispersed particles 712 or/and the shell 713 is selected, Weight can be reduced.

The weight of the core 711 may exceed at least 50% of the weight of the adsorbent 71 in order to reduce the total weight of the adsorbent 71. Preferably, the core 711 may contain 51% to 90% by weight based on 100% by weight of the adsorbent 71. When the core 711 is less than 51% by weight based on 100% by weight of the adsorbent 71, the weight of the entire adsorbent 71 may be increased due to another material having a higher density than the core 711 having a lower density, and the core ( If 711) exceeds 90% by weight with respect to 100% by weight of the adsorbent 71, the total weight of the adsorbent 71 may be reduced, but the volume of the shell 713 may become too small, resulting in a decrease in adsorption performance. Therefore, it is preferable to have a weight% within the above-described range.

The core 711 may have various shapes, but is preferably a spherical shape. The diameter of the core 711 is not limited, but it is preferably 50 microns to 2500 microns. This is, when the diameter of the core 711 is smaller than 50 microns, the rate at which the core 711 absorbs microwaves and raises the temperature to the desorption temperature may be low, and when the diameter of the core 711 is larger than 2500 microns, the adsorbent 71 ), because the area occupied by the shell 713 is too narrow to reduce the adsorption power.

The shell 713 is disposed to surround the core 711 and has an adsorption function. The shell 713 is in surface contact with the outer surface of the core 711 and receives heat generated from the core 711.

The shell 713 may be made of a material having a high adsorption capacity for gaseous or particulate matter, and the shell 713 may be porous having a plurality of micropores. The shell 713 may be zeolite, activated alumina, or a mixture thereof.

Zeolite is known as a three-dimensional inorganic polymer in which silicon (Si) and aluminum (Al) are connected through four crosslinked oxygens, respectively. Here, since aluminum has a negative charge as it is bonded with four oxygens, various cations exist in the zeolite to offset this charge. Specifically, cations exist inside the pores and the remaining spaces are usually filled with water molecules, so they have relatively free mobility in the pores, and ion exchange with other cations is easy. In addition, the heated and dehydrated zeolites have the property of filling the empty space by inhaling water molecules and other small molecules of a size that can pass through the pore inlet again, so that the dehydrated zeolite is an adsorbent ( 71), or as an absorbent. Typically, zeolites are classified into β-zeolite, A-zeolite, ZSM-5 type zeolite, X-zeolite, Y-zeolite, or L-zeolite according to the structure or ratio of silicon and aluminum. In the present invention, it is possible to select and use a type of zeolite capable of easily adsorbing a target to be adsorbed according to the intended use of the adsorbent 71. Specifically, in one embodiment of the present invention, β-zeolite may be used as the volatile organic compound shell 713, and Y-zeolite may be used as the moisture shell 713.

Activated alumina is mainly produced from heat-treated alumina hydrate, and is an adsorbent 71 that is widely used for removing moisture from compressed air because of its high heat resistance and wide specific target, and particularly strong moisture absorption.

Depending on the embodiment, the shell 713 may be ion-exchanged with cations.

Specifically, the cations are potassium (K), silver (Ag), sodium (Na), barium (Ba), lithium (Li), magnesium (Mg), strontium (Sr), phosphorus (P), manganese (Mn), It may be at least one material selected from calcium (Ca) and iron (Fe). As described above, the shell 713 subjected to ion-exchange treatment with a cation may increase reactivity with microwaves, thereby improving microwave absorption. For example, when zeolite is used as the shell 713 and ion exchange treatment is performed with potassium, the structure of the zeolite is converted from sodium foam to potassium foam, thereby increasing the microwave absorption capacity. have. Accordingly, the temperature of the shell 713 may be rapidly increased by reacting with microwaves irradiated to the shell 713 or transmitted by the silicon carbide beads and the silicon carbide particles. Specifically, this may be described in detail in the following embodiments and drawings.

In addition, the shell 713 according to an embodiment of the present invention may include zeolite particles, a solid binder mixed with the zeolite particles, and a liquid binder mixed with the zeolite particles and the solid binder.

Specifically, the solid binder may include one of Boehmite, Kaolinite, and Bentonite. The liquid binder may include at least one of a silica sol and an alumina sol. In addition, as another example, the liquid binder may include a silica sol and an alumina sol.

The liquid binder and the solid binder increase the hardness of the shell 713 while increasing the formation rate of the alumina-silica structure. In the shell 713 whose hardness has been strengthened, generation of dust is reduced.

The silica sol may be included in an amount of 45% to 55% by weight based on 100% by weight of the zeolite particles. The alumina sol may be included in an amount of 45% to 55% by weight based on 100% by weight of the zeolite particles.

The solid binder may be included in an amount of 10% to 20% by weight based on 100% by weight of the zeolite particles.

Hereinafter, a preferred embodiment of the present invention will be described.

The shell 713 of Example 1 includes zeolite particles, beamite, silica sol, and alumina sol. Here, beamite is 10 to 20% by weight based on 100% by weight of zeolite particles, silica sol is 50% by weight based on 100% by weight of zeolite particles, and alumina sol may be 50% by weight based on 100% by weight of zeolite particles.

The shell 713 of Example 2 includes zeolite particles, kaolinite, silica sol, and alumina sol. Here, kaolinite may be 20% by weight based on 100% by weight of zeolite particles, silica sol may be 50% by weight based on 100% by weight of zeolite particles, and alumina sol may be 50% by weight based on 100% by weight of zeolite particles.

The shell 713 of Example 3 includes zeolite particles, bantonite, silica sol, and alumina sol. Here, the bantonite may be 20 wt% based on 100 wt% of the zeolite particles, the silica sol may be 50 wt% based on the zeolite particles 100 wt%, and the alumina sol may be 50 wt% based on 100 wt% of the zeolite particles.

In one embodiment of the present invention, the adsorbent 71 may be used for adsorption of volatile organic compounds. Specifically, the volatile organic compound is, the volatile organic compound is acetylene (aetylene), acetaldehyde (ataldehyde), benzene (benzene), 1,3-butadiene (1,3-butadiene), butane (butane), 1 -Butene (1-butene), 2-butene (2-butene), cyclohexane (cyclohexane), ethylene (ethylene), formaldehyde (formaldehyde), n-hexane (n-hexane), isopropyl alcohol (isopropylalcohol), Methanol, methylethylketone, propylene oxide, ethylbenzene, hydrochloric acid (HCl), toluene, xylene, styrene, or mixtures thereof It may be, but is not limited thereto.

The shell 713 may contain 40% by weight to 49% by weight based on 100% by weight of the adsorbent 71. In this case, the thickness (D) of the shell 713 is preferably 20 microns to 4000 microns. When the thickness of the shell 713 is thick, the interior of the shell 713 becomes an area that does not exhibit adsorption performance, and it is difficult to rapidly increase the temperature to the desorption temperature by the core 711, and the thickness of the shell 713 is too thin. In this case, since the desired adsorption performance cannot be expected, the shell 713 has a thickness or weight in the above-described range.

It is preferable that the ratio of the thickness of the shell 713 and the diameter of the core 711 is 1:1 to 1:3. When the thickness of the shell 713 is thick, the interior of the shell 713 becomes an area that does not exhibit adsorption performance, and it is difficult to rapidly increase the temperature to the desorption temperature by the core 711, and the thickness of the shell 713 is too thin. In this case, since the desired adsorption performance cannot be expected, the shell 713 and the core 711 are formed in the above-described ratio. 9 is a view showing the absorbent according to an embodiment of the present invention.

The adsorbent 71 according to the present invention has a core 711 disposed inside and an adsorption function disposed to surround the core 711 to improve adsorption performance while absorbing energy-efficient microwaves. It includes the shell 713 and the dispersed particles 712 dispersed in the core 711.

In this sealing example, the core 711 and the shell 713 are the same as the embodiment of FIG. 8 unless otherwise specified.

When the dispersed particles 712 have only the core 711 and the shell 713 structure, the core 711 has high heat conduction and low density, but the absorbing ability of microwaves is low, so that the adsorbent 71 is removed to the desorption temperature. If it takes a long time to increase the temperature, it is used to reduce the time to reach the desorption temperature or to scatter microwaves into the core 711.

The dispersed particles 712 may adjust the material and weight of the adsorbent 71 to control the weight of the adsorbent 71 and the temperature reached until the desorption time.

The dispersed particles 712 may include a material having a heat storage function and a reactivity to microwaves greater than that of the core 711. When the dispersed particles 712 have greater reactivity to microwaves than the core 711, the adsorbent 71 can be lightened while reducing the time to reach the desorption temperature of the adsorbent 71.

For example, the dispersed particles 712 may include a material different from the core 711. Specifically, the dispersed particles 712 may include a dielectric material having superior microwave reactivity to the core 711.,

For example, it is preferable that the dielectric constant of the dielectric used for the dispersed particles 712 is 1 to 10. When the dielectric constant of the dielectric is less than 1, the reactivity with microwaves is too weak, and when the dielectric constant of the dielectric exceeds 10, the resistance to microwaves is very large, and there is a problem that the adsorbent 71 is too overheated within a short time. It is desirable to have a range of permittivity. For example, the dispersed particles 712 may include zinc oxide (ZnO), copper oxide (CuO), and mixtures thereof.

For another example, a material that diffuses or diffuses into the core 711 by reflecting microwaves may be selected for the dispersed particles 712. For example, the dispersed particles 712 may include at least one of metals such as iron, copper, silver, aluminum, and zinc, or a mixture thereof.

Since the core 711 has a spherical shape, it may be difficult for microwaves to propagate into the core 711. If the dispersed particles 712 contain metal, they pass through the shell 713 and are incident on the outer surface of the core 711. Microwave spreads throughout the inside of the core 711, so that the core 711 heats up quickly and the core 711 heats up quickly.

The dispersed particles 712 preferably have 0.1% to 10% by weight based on 100% by weight of the core 711. When the dispersed particles 712 are less than 0.1% by weight with respect to 100% by weight of the core 711, the time for the adsorbent 71 to rise to the desorption temperature may be delayed, and the dispersed particles 712 may be at the core 711, 100 If it exceeds 10% by weight relative to the weight%, the ratio of the dispersed particles 712 to the light core 711 material may be high, so that the weight of the adsorbent 71 may be too large, and from the core 711 to the shell 713 Since heat transfer may be delayed, the dispersed particles 712 preferably have a weight in the range described above. More preferably, the dispersed particles 712 may have 2% to 4% by weight based on 100% by weight of the core 711.

The diameter of the dispersed particles 712 is not limited, but is preferably smaller than the diameter of the core 711. Specifically, the diameter of the dispersed particles 712 is preferably 0.5 ㎛ to 10 ㎛. This means that when the diameter of the dispersed particles 712 is smaller than 0.5 μm, the dispersed particles 712 cannot absorb or reflect microwaves, and when the diameter of the dispersed particles 712 is greater than 0.5 μm to 10 μm, the adsorbent ( 71) may be too large, heat transfer from the core 711 to the shell 713 may be delayed, or the time for the adsorbent 71 to reach the desorption temperature may be lengthened, so the dispersed particles 712 are described above. It is desirable to have a range of diameters.

According to an embodiment, the dispersed particles 712 may include a metal and a dielectric material. Here, the dielectric and metal are as described above. At this time, the ratio of the metal and the dielectric in the dispersed particles 712 is not limited, but the metal contains 10% to 30% by weight with respect to 100% by weight of the dispersed particles 712, and the dielectric is 100% by weight of the dispersed particles 712. It is preferred to include 70% to 90% by weight based on the weight%.

If there is too much metal in the dispersed particles 712, the amount of dielectric material that generates heat by reacting with microwaves decreases, and the time for the adsorbent 71 to reach the desorption temperature is delayed, and when there is too much dielectric material in the dispersed particles 712, Since the weight of the adsorbent 71 is increased and heat conduction from the core 711 to the shell 713 is delayed, the ratio of the metal and the dielectric in the dispersed particles 712 is preferably within the above-described range.

As described above, the adsorbent 71 of the present invention can configure the adsorbent 71 having excellent adsorption power with respect to the adsorption target by varying the shell 713 according to the adsorbing target material (volatile organic compound or moisture), As described above, by using the core 711 having excellent conductivity and low density and the dispersed particles 712 having excellent reactivity with microwaves, it is possible to increase reactivity with microwaves, and a volatile organic compound removal system using microwaves, Or it can be actively used in a moisture removal system.

Hereinafter, a method of manufacturing the adsorbent of the present invention will be described.

First, a core 711 is formed. After the core 711 is formed, a shell 713 is formed on the outer surface of the core 711.

The shell 713 is formed by coating the outer surface of the core 711. Specifically, zeolite particles and a solid binder are mixed using a gel-like liquid binder as a solvent, and then sprayed on the outer surface of the core 711 by a spray method, and the shell 713 is formed through heat treatment.

Here, the heat treatment is performed for 2 to 48 hours at a temperature range of 500°C to 800°C for the core-shell structured adsorption material on which the shell coating has been completed. Solvent drying and sintering of the absorbent through heat treatment.

Of course, when forming the shell 713, it may further include a seed material in addition to the zeolite particles, the solid binder and the liquid binder. The seed material may include natural zeolite.

10 is a diagram showing heat transfer of the absorbent agent shown in FIG. 9.

Referring to FIG. 10, when microwaves are irradiated to the adsorbent 71, first, a part of the microwaves are absorbed by the core 711 in the inner core of the adsorbent 71, and the absorbed microwave energy heats the core 711, Heat from the core 711 is transferred to the shell 713. Part of the microwave incident on the core 711 is reflected by the dispersed particles 712 to the center of the core 711 and diffused, or absorbed by the dispersed particles 712 to generate heat. Heat of the dispersed particles 712 is transferred to the surrounding core 711.

Heat transferred to the core 711 is transferred to the shell 713 in contact with the core 711.

In this way, the microwave energy irradiated to the adsorbent 71 can be quickly transferred to the entire area of the adsorbent 71 due to this structural feature, so that the adsorbent 71 can increase its temperature to the desorption temperature more quickly, ) Can increase the speed of detachment.

11 is data obtained by experimenting heating by microwaves of Examples and Comparative Examples of the present invention.

Referring to FIG. 11, in a comparative example, in a core-shell structure, the core includes SiC. In Example 1, in a core-shell structure, the core contains activated carbon. In Example 2, in the core-shell structure, the core is activated carbon, and the dispersed particles containing zinc oxide in the core are contained in 3% by weight based on 100% by weight of the core. In Example 3, in the core-shell structure, the core is activated carbon, and the dispersed particles containing copper oxide in the core are contained in 3% by weight based on 100% by weight of the core.

The comparative examples and the examples were all measured for their temperature after 30 seconds and 1 minute after applying a microwave of 700 kw. Of course, the experiment was conducted with the same diameters of the cores of the Comparative Examples and Examples.

Compared to the comparative example, Examples 1 to 3 show that the temperature of the adsorbent is rapidly increased.

In the above, preferred embodiments of the present invention have been shown and described, but the present invention is not limited to the specific embodiments described above, and without departing from the gist of the present invention claimed in the claims, Various modifications may be possible by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or prospect of the present invention.

10: adsorption duct 20: rotating cartridge
30: desorption duct 60: catalyst module
71: adsorbent 711: core
712: dispersed particles 713: shell

Claims (14)

A core disposed therein and including a carbon-based material; And
A shell having an adsorption function disposed to surround the core; Including,
The shell,
Zeolite particles,
A solid binder mixed with the zeolite particles,
Adsorbent comprising a liquid binder mixed with the zeolite particles and the solid binder. The method of claim 1,
The solid binder,
An adsorbent comprising one of Boehmite, Kaolinite, and Bentonite. The method of claim 1,
The liquid binder,
Adsorbent comprising at least one of silica sol and alumina sol The method of claim 1,
The liquid binder,
Adsorbent comprising silica sol and alumina sol. The method of claim 4,
The silica sol,
An adsorbent contained in an amount of 45% to 55% by weight based on 100% by weight of the zeolite particles. The method of claim 2,
The alumina sol,
An adsorbent contained in an amount of 45% to 55% by weight based on 100% by weight of the zeolite particles. The method of claim 4,
The solid binder,
An adsorbent contained in an amount of 10% to 20% by weight based on 100% by weight of the zeolite particles. The method of claim 1,
The core is an adsorbent comprising at least one of activated carbon, graphene, graphite carbon black, and impregnated activated carbon. The method of claim 8,
An adsorbent having a diameter smaller than that of the core, and further comprising dispersed particles dispersed in the core. The method of claim 8,
The diameter of the core is 100 microns to 300 microns adsorbent. The method of claim 8,
The adsorbent has a diameter of the core and a thickness of the shell of 1:1 to 1:3. The method of claim 9,
The dispersed particles,
An adsorbent comprising a material different from the core. The method of claim 9,
The dispersed particles are adsorbents containing 0.1% to 10% by weight based on 100% by weight of the core. The method of claim 9,
The dispersed particles are adsorbents comprising a dielectric.

Images