KR101811375B1 - Apparatus for manufacturing ceramic pellet structure for reducing nitrous oxide and method for manufacturing ceramic pellet structure for reducing nitrous oxide using the same - Google Patents

Apparatus for manufacturing ceramic pellet structure for reducing nitrous oxide and method for manufacturing ceramic pellet structure for reducing nitrous oxide using the same Download PDF

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KR101811375B1
KR101811375B1 KR1020160020726A KR20160020726A KR101811375B1 KR 101811375 B1 KR101811375 B1 KR 101811375B1 KR 1020160020726 A KR1020160020726 A KR 1020160020726A KR 20160020726 A KR20160020726 A KR 20160020726A KR 101811375 B1 KR101811375 B1 KR 101811375B1
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protective layer
catalyst layer
extruder
catalyst
pellet structure
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KR1020160020726A
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Korean (ko)
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KR20170098604A (en
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김현호
노학재
장원철
권원태
가명진
이민우
김진영
양창희
김대수
박완근
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(주)명성씨.엠.아이
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/26—Extrusion dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
    • B01J21/04—Alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/20—Vanadium, niobium or tantalum
    • B01J23/22—Vanadium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/65—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the ferrierite type, e.g. types ZSM-21, ZSM-35 or ZSM-38, as exemplified by patent documents US4046859, US4016245 and US4046859, respectively
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
    • C04B35/19—Alkali metal aluminosilicates, e.g. spodumene
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
    • C04B2235/3472—Alkali metal alumino-silicates other than clay, e.g. spodumene, alkali feldspars such as albite or orthoclase, micas such as muscovite, zeolites such as natrolite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Structural Engineering (AREA)
  • Catalysts (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Abstract

The invention relates to a method for producing a ceramic pellet structure for N 2 O reduction by using the manufacturing apparatus, and this ceramic pellet structure for an N 2 O abatement. To this end, an apparatus for producing a ceramic pellet structure for reducing N 2 O includes: a catalyst layer extruder for producing a catalyst layer of a ceramic pellet structure; And a protective layer extrusion molding machine for producing a protective layer surrounding the catalyst layer of the ceramic pellet structure.

Description

TECHNICAL FIELD The present invention relates to an apparatus for manufacturing a ceramic pellet structure for reducing N2O, and a method for manufacturing a ceramic pellet structure for reducing N2O using the same. DESCRIPTION OF THE RELATED ART [0002]

It made the present invention is a ceramic porous body having, more particularly, many pores relates to a method for producing a ceramic pellet structure for an N 2 O abatement by using the manufacturing apparatus, and this ceramic pellet structure for an N 2 O abatement, N A method for producing a ceramic pellet structure for reducing N 2 O having a double layer in order to remove a protective layer or a N 2 O reduction inhibiting substance of a 2 O reducing catalyst layer and a method for producing a ceramic pellet structure for reducing N 2 O .

NO X emissions regulations are already in progress as a causative agent of acid gases, but N 2 O is not yet regulation applies. However, N 2 O is the six greenhouse gases designated by the Kyoto Protocol, and emission reduction technologies have already been introduced in chemical plants such as nitric acid plants and caprolactam plants. In particular, N 2 O has a warming index that is 310 times higher than CO 2, and is therefore considered to be a subject of the Clean Development Mechanism (CDM) project and a substance that must be removed to achieve the GHG reduction target.

Various techniques have been developed to reduce NO x emissions, but the use of selective non-catalytic reduction (SNCR) or catalysts that inject ammonia reducing agents into the high temperature region (750-900 ° C) Selective Catalytic Reduction (SCR) has been widely spread in the mid-temperature range (250 ~ 400 ℃) of exhaust gas ducts. The reduction of N 2 O is mainly carried out in the flue gas of nitric acid factory. The catalytic decomposition method which decomposes N 2 O generated by ammonia oxidation in the region of 450 ~ 600 ° C or the pyrolysis Is used.

In the case of conventional pellet structure catalysts used in these application methods, it is possible to improve the reactivity by increasing the contact between the reactant and the catalyst, but contaminants other than the N 2 O reaction gas are contained in the exhaust gas, 2 O reduction efficiency is deteriorated with time, and there is a demand for improvement thereof.

Korean Patent Registration No. 10-1362845

The present invention for solving the above problems, an object of the present invention the reaction and to improve the responsiveness to widen the contact area between the catalyst while still effectively block such contaminants other than N 2 O in the exhaust gas for a long time, N 2 O The present invention provides an apparatus for manufacturing a ceramic pellet structure for reducing N 2 O that can maintain reduction efficiency and a method for manufacturing a ceramic pellet structure for N 2 O reduction using the same.

These and other objects and advantages of the present invention will become apparent from the following description of a preferred embodiment.

This object is achieved by a catalyst layer extruder for producing a catalyst layer of a ceramic pellet structure; And ceramic surrounding the catalyst layer of the pellet structure has a protective layer extrusion molding machine to prepare a protective layer; can be achieved by a ceramic pellet structure producing apparatus for the N 2 O reduction comprising a.

At this time, the catalyst layer extrusion molding apparatus includes a catalyst layer extrusion molding apparatus main body; A screw for a catalyst layer extruder that feeds a catalyst layer forming raw material in one direction; A nozzle adapter for a catalyst layer extruder for supplying a catalyst layer forming material transferred by a screw for a catalyst layer extruder to a nozzle for a catalyst layer extruder; An adapter support for a catalyst layer extruder that maintains a connection between a catalyst layer extruder main body and a nozzle adapter for a catalyst layer extruder; And a catalyst layer extruder nozzle for forming a catalyst layer of the ceramic pellet structure, wherein the protective layer extrusion molding machine comprises a protective layer extrusion molding machine main body; A protective layer extruder screw for conveying the protective layer forming material in one direction; A protective layer extruder for feeding a protective layer forming material fed by a screw to a nozzle for a protective layer extruder; An adapter support for a protective layer extruder to maintain the coupling of the protective layer extrusion molding machine body and the nozzle adapter for the protective layer extrusion molding machine; And a protective layer extruder nozzle for forming a protective layer of the ceramic pellet structure.

Also, the above object can be accomplished by a method of manufacturing a ceramic pellet structure for N 2 O reduction using the apparatus for producing a ceramic pellet structure for N 2 O reduction, comprising the steps of: preparing a catalyst layer clay by mixing a catalyst raw material, a processing aid and a solvent; Mixing a ceramic raw material, a processing aid, and a solvent to produce a protective layer clay; Forming a catalyst layer using the prepared catalyst layer clay and forming a protective layer surrounding the catalyst layer protective layer using the produced protective layer clay to form a ceramic pellet structure; And drying and firing the formed ceramic pellet structure. The present invention also provides a method of manufacturing a ceramic pellet structure for N 2 O reduction.

At this time, the catalyst raw material in the catalyst layer clay preparation step may be at least one selected from the group consisting of aluminum (Al), silicon (Si), titanium (Ti), vanadium (V), chromium (Cr), manganese And at least one metal oxide selected from the group consisting of nickel (Ni), copper (Cu), zinc (Zn) and magnesium (Mg) At least one zeolite powder selected from the group consisting of BEA, ZSM-5 (MFI), Mordenite (MOR) and Ferrierite (FER).

The step of molding the ceramic pellet structure can be performed by adjusting the ratio (Rr) / r of the thickness Rr of the protective layer to the thickness r of the catalyst layer to 0.1-0.5, The outer diameter is 0.5 to 1 cm, and the outer diameter to length ratio may be 1: 0.5 to 1.5.

According to the present invention, it is possible to produce a ceramic pellet structure for reducing N 2 O, which includes both a catalyst layer extrusion molding machine and a protective layer extrusion molding machine and includes a catalyst layer and a protective layer surrounding the catalyst layer.

More specifically, by forming a catalyst layer and a protective layer surrounding the catalyst layer, the contact area between the reactant and the catalyst is widened to improve the reactivity, while effectively preventing contaminants other than N 2 O from being discharged from the exhaust gas to maintain N 2 O reduction efficiency for a long time It is possible to manufacture a ceramic pellet structure for reducing N 2 O, which is advantageous in that the lifetime of the catalyst can be extended without installing a separate protective device or a pollutant removing device.

In addition, the thickness of the protective layer of the ceramic pellet structure for reducing N 2 O can be adjusted so that N 2 O reduction can be suitably performed according to the composition of the exhaust gas and the operating conditions.

However, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a schematic view of a catalyst layer extrusion molding machine and a protective layer extrusion molding machine of an apparatus for manufacturing a ceramic pellet structure for reducing N 2 O according to an embodiment of the present invention.
2 is a schematic view illustrating a method of manufacturing a ceramic pellet structure for reducing N 2 O according to an embodiment of the present invention.
FIG. 3 is a schematic view of a pellet structure manufactured by the method for manufacturing a ceramic pellet structure for reducing N 2 O according to an embodiment of the present invention.
Fig. 4 is a view schematically showing a section of Fig. 3. Fig.

[National R & D Project Supporting the Invention]

[Ministry of Environment] Ministry of Environment

[Assignment number] 2013001690011

[Research Management Institution] Korea Environment Industrial Technology Institute

[Research Project] Global Top Environmental Technology Development Project

[Research Project] Development and demonstration of catalyst for low concentration N 2 O reduction

[Contribution rate] 1/1

[Host Organization] Kokat

[Research period] 2013.11.01 ~ 2017.04.30

Hereinafter, the present invention will be described in detail with reference to embodiments and drawings of the present invention. It will be apparent to those skilled in the art that these embodiments are provided by way of illustration only for the purpose of more particularly illustrating the present invention and that the scope of the present invention is not limited by these embodiments .

Also, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains and, where contradictory, Will be given priority.

In order to clearly illustrate the claimed invention, parts not related to the description are omitted, and like reference numerals are used for like parts throughout the specification. And, when a section is referred to as "including " an element, it does not exclude other elements unless specifically stated to the contrary. In addition, "part" described in the specification means one unit or block performing a specific function.

In each step, the identification code is used for convenience of explanation, and the identification code does not describe the order of the steps, and each step may be performed differently from the stated order unless clearly specified in the context. have. That is, each of the steps may be performed in the same order as described, or may be performed substantially concurrently or in the reverse order.

1 is a schematic view of a catalyst layer extrusion molding machine 10 and a protective layer extrusion molding machine 20 of an apparatus for manufacturing a ceramic pellet structure for reducing N 2 O according to an embodiment of the present invention. Referring to FIG. 1, an apparatus for manufacturing a ceramic pellet structure for reducing N 2 O according to an embodiment of the present invention includes a catalyst layer extruder 10 for producing a catalyst layer of a ceramic pellet structure; And a protective layer extrusion molding machine (20) for producing a protective layer surrounding the catalyst layer of the ceramic pellet structure. Preferably, the hopper for storing the catalyst layer clay, the hopper for storing the protective layer clay, The catalyst layer, and the protective layer extrusion molding machine. The apparatus for manufacturing a ceramic pellet structure for reducing N 2 O according to an embodiment of the present invention includes a catalyst layer extrusion molding machine 10 and a protective layer extrusion molding machine 20, And a protective layer (protecting the catalyst layer and simultaneously removing the N 2 O reducing inhibiting substance), and the pellet structure thus prepared can enlarge the contact area between the reactant and the catalyst, , It is possible to effectively prevent the pollutants other than N 2 O in the exhaust gas and to maintain the N 2 O reduction efficiency for a long time, Effect.

In one embodiment, the catalyst layer extrusion molding machine 10 includes a catalyst layer extrusion molding machine main body 11; A catalyst layer extruder screw (12) for transferring the catalyst layer forming raw material in one direction; A nozzle adapter (13) for a catalyst layer extruder for supplying a catalyst layer forming material fed by a screw (12) for a catalyst layer extruder to a nozzle (15) for a catalyst layer extruder; An adapter holder 14 for a catalyst layer extruder for holding the catalyst layer extruder main body 11 and the nozzle adapter 13 for the catalyst layer extruder; And a catalyst layer extruder nozzle (15) for forming a catalyst layer of the ceramic pellet structure.

The catalyst layer extruder main body 11 is connected to a hopper for storing the catalyst layer clay and includes a power source device for driving the catalyst layer extrusion molding machine 10 such as the screw 12 for the catalyst layer extruder.

The screw 12 for the catalyst layer extruder may be composed of single or double and serves to transfer the catalyst layer clay supplied from the hopper for storing the catalyst layer clay to the main body 11 of the catalyst layer extrusion molding machine in one direction, Is connected to the motor and can be rotated.

The nozzle adapter 13 for the catalyst layer extruder serves to supply the catalyst layer forming raw material transferred by the screw 12 for the catalyst layer extruder to the nozzle 15 for the catalyst layer extruder and the adapter support 13 for the catalyst layer extruder, Serves to lower the defective rate of the catalyst layer formed by firmly connecting the main body 11 of the catalyst layer extruder and the nozzle adapter for the catalyst layer extruder.

The catalyst layer extruder nozzle 15 forms a certain shape, preferably a circular catalyst layer, inside the ceramic pellet structure by using the catalyst layer soil transferred by the screw 12 and the adapter 13 for the catalyst layer extruder. At this time, a nozzle hole 16 is formed at one end of the catalyst layer extruder nozzle 15 (that is, the end adjacent to the catalyst adapter extruder nozzle adapter 13 and in contact with the screw 12 for the catalyst layer extruder) In order to enable the catalyst layer clay transferred through the screw to enter the nozzle 15 for the catalyst layer extruder well, the nozzle hole 16 is formed at a predetermined angle with respect to the entry direction of the catalyst layer clay As shown in FIG. In addition, the nozzle 15 for the catalyst bed extruder may have various sizes of the nozzle holes 16 so as to form a catalyst layer having an appropriate outer diameter so as to improve the N 2 O reducing efficiency of the produced N 2 O reducing ceramic pellet structure .

In one embodiment, the protective layer extrusion molding machine 20 includes a protective layer extrusion molding machine main body 21; A protective layer extruder screw 22 for conveying the protective layer forming material in one direction; A nozzle adapter (23) for a protective layer extruder for supplying a protective layer forming material fed by a screw (22) for a protective layer extruder to a nozzle (25) for a protective layer extruder; An adapter support 24 for a protective layer extruder that maintains the coupling between the protective layer extrusion molding machine main body 21 and the nozzle adapter 23 for the protective layer extruder; And a protective layer extruder nozzle (25) forming a protective layer of the ceramic pellet structure.

The protective layer extrusion molding machine 20 is disposed such that the protective layer extruder screw 22 provided therein is perpendicular to the screw 12 for the catalyst layer extruder. That is, the protective layer extrusion molding machine 20 includes a protection layer 32 disposed vertically to the catalyst layer extrusion molding machine 10 and protecting the catalyst layer 31 when the catalyst layer extrusion molding machine 10 fabricates the catalyst layer 31 The present invention has an advantage that a ceramic pellet structure having a double layer can be effectively produced.

The protective layer extrusion molding machine main body 21 is connected to a hopper for storing the protective layer clay and includes a power source device for driving the protective layer extrusion molding machine such as the screw 22 for the protective layer extruder.

The protective layer extruder screw 22 may be made of a single or a double, and serves to transfer the protective layer clay supplied from the hopper storing the protective layer clay to the main body 21 of the protective layer extrusion molding machine in one direction , One end of the screw is connected to the motor and is rotatable.

The nozzle adapter 23 for the protective layer extruder serves to supply the protective layer forming raw material conveyed by the screw 22 for the protective layer extruder to the nozzle 25 for the protective layer extruder, The adapter supporter 24 serves to lower the defective rate of the protective layer formed by firmly connecting the protective layer extrusion molding machine main body 21 and the nozzle adapter 23 for the protective layer extruder.

The nozzle 25 for the protective layer extruder is formed in a certain shape so as to surround the catalyst layer formed inside the ceramic pellet structure by using the protective layer soil conveyed by the screw 22 and the adapter 23 for the protective layer extruder, Forms a circular protective layer. At this time, the nozzle hole 26 is formed at one end of the nozzle 25 for the protective layer extruder (i.e., the end adjacent to the nozzle adapter 23 for the protective layer extruder and in contact with the screw 22 for the protective layer extruder) The nozzle holes 26 are formed in the upper surface of the protective layer soil so that the protective layer soil conveyed through the screw can be well in contact with the nozzle 25 for the protective layer extruder. And may be formed to have a predetermined angle with the entering direction. Further, the protective layer extrusion molding machine nozzle 25, the size of the nozzle holes 26 to form a protective layer having a proper outer diameter in order to improve the N 2 O reduction efficiency of the ceramic pellet structure for an N 2 O reduction is made Can be variously changed.

On the other hand, when forming the cylindrical ceramic pellet structure including the catalyst layer and the protective layer using the nozzle 15 for the catalyst layer extruder and the nozzle 25 for the protective layer extruder, the thickness ratio of the catalyst layer and the protective layer, (Diameter, 2R) and length (h, length means height in a general cylinder) of the outer diameter of the cylinder (see Figs. 3 and 4). The ratio (Rr) / r) of the thickness Rr of the protective layer 32 to the thickness r of the catalyst layer 31 of the formed ceramic pellet is preferably adjusted from 0.1 to 0.5. When the thickness ratio is less than 0.1, it is difficult to protect the catalyst layer, and when it exceeds 0.5, it is difficult to obtain an effective N 2 O reduction efficiency. The outer diameter 2R of the cylindrical ceramic pellet structure is preferably 0.5 to 1 cm, and the ratio of the outer diameter 2R to the length h is preferably 1: 0.5 to 1.5. If the amount is less than the above range, it is difficult to mechanically form the protective layer and the pressure loss in the reactor may increase. If the amount exceeds the above range, the amount of the catalyst is excessively used and the use of the catalyst for N 2 O reduction This is because it is not efficient.

Next, using the ceramic structural body pellet manufacturing apparatus for the N 2 O reduction described above will be explained a method for producing a ceramic pellet structure 30 for N 2 O abatement.

2 is a view schematically showing a method (S100) for manufacturing a ceramic pellet structure for reducing N 2 O according to an embodiment of the present invention. Referring to FIG. 2, a method (S100) for producing a ceramic pellet structure for reducing N 2 O according to an embodiment of the present invention includes: (S10) preparing a catalyst layer clay by mixing a catalyst raw material and a processing aid; (S20) mixing a ceramic raw material and a processing aid to prepare a protective layer clay; Forming a catalyst layer 31 using the prepared catalyst layer clay and forming a protective layer 32 surrounding the catalyst layer 31 using the produced protective layer clay to form a ceramic pellet structure S30; And drying and firing the formed ceramic pellet structure (S40).

Throughout this specification, clay means a dough-like mixture in which raw materials for forming the catalyst layer 31 or the protective layer 32 are mixed.

In one embodiment, step (S10) of preparing the catalyst bed clay is a step of mixing the catalyst raw material, processing aid and solvent to prepare catalyst bed clay, wherein the catalyst raw material may include a metal oxide such as cobalt. More specifically, the metal oxide is selected from the group consisting of Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni), copper (Cu), zinc (Zn), and magnesium (Mg).

The processing aid may include an organic binder for maintaining the shape after molding and an inorganic binder for increasing the strength of the molding, and the solvent is preferably water. The organic binder improves the shape retention after molding and alleviates cracking during drying. The organic binder may be at least one selected from the group consisting of ethyl cellulose group, methylcellulose group, ethylcellulose derivative, and methylcellulose derivative But it is more preferable to use a methyl cellulose group, but not limited thereto. The inorganic binder serves to increase the strength of the molded product, and may be at least one selected from the group consisting of silica sol, zirconia sol, titania sol, and calcined products thereof.

At this time, the organic binder and the inorganic binder are preferably contained in an amount of 1 to 20 parts by weight based on 100 parts by weight of the catalyst raw material. When the amount is less than 1 part by weight or exceeds 20 parts by weight, it is difficult to obtain the shape after molding, the strength of the molding and the homogeneity of the clay.

In one embodiment, step S20 of fabricating the protective layer clay is a step of preparing the protective layer clay by mixing the ceramic raw material and the processing aid, and the ceramic raw material may include a ceramic raw material of a porous material such as zeolite . More specifically, it may include at least one zeolite powder selected from the group consisting of Beta (BEA), ZSM-5 (MFI), Mordenite (MOR) and Ferrierite (FER).

The processing aid may include an organic binder for maintaining the shape after molding and an inorganic binder for increasing the strength of the molding, and the solvent is preferably water. The organic binder improves the shape retention after molding and alleviates cracking during drying. The organic binder may be at least one selected from the group consisting of ethyl cellulose group, methylcellulose group, ethylcellulose derivative, and methylcellulose derivative But it is more preferable to use a methyl cellulose group, but not limited thereto. The inorganic binder serves to increase the strength of the molded product, and may be at least one selected from the group consisting of silica sol, zirconia sol, titania sol, and calcined products thereof.

In this case, the organic binder and the inorganic binder are preferably contained in an amount of 1 to 20 parts by weight based on 100 parts by weight of the ceramic raw material. When the amount is less than 1 part by weight or exceeds 20 parts by weight, it is difficult to obtain the shape after molding, the strength of the molding and the homogeneity of the clay.

In addition, the catalyst layer and the protective layer are selected according to their performance and role. Depending on the intended use of the prepared catalyst, the catalyst layer may be made of a clay containing a ceramic raw material such as a protective layer clay, May also be made of clay comprising metal oxides.

In one embodiment, the step of forming the ceramic pellet structure S30 includes forming the catalyst layer 31 using the prepared catalyst layer clay and forming a protective layer 31 surrounding the outside of the catalyst layer 31 using the prepared protective layer clay (The catalyst layer extrusion molding machine 10 and the protective layer extrusion molding machine 20) in the same manner as the ceramic pellet structure manufacturing apparatus described above, can do.

FIG. 3 is a schematic view of a pellet structure manufactured by a method (S100) for producing a ceramic pellet structure for reducing N 2 O according to an embodiment of the present invention, and FIG. 4 is a schematic view of a cross section of FIG. 3 . 3 and 4, the ceramic pellet structure 30 including the catalyst layer 31 and the protective layer 32 surrounding the catalyst layer 31 can be manufactured in a cylindrical shape, and the catalyst layer 31 and the protective layer 32 (Diameter, 2R) and length (h, length means height in a general cylinder) of the pellet structure and the thickness ratio of the pellet structure to the pellet structure. The ratio (Rr) / r) of the thickness Rr of the protective layer 32 to the thickness r of the catalyst layer 31 of the formed ceramic pellet is preferably adjusted from 0.1 to 0.5. When the thickness ratio is less than 0.1, the protective layer 32 hardly protects the catalyst layer 31, and when it exceeds 0.5, it is difficult to obtain effective N 2 O abatement efficiency. The outer diameter 2R of the cylindrical ceramic pellet structure 30 is preferably 0.5 to 1 cm, and the ratio of the outer diameter 2R to the length h is preferably 1: 0.5 to 1.5. If the amount is less than the above range, it is difficult to mechanically form the protective layer and the pressure loss in the reactor may increase. If the amount exceeds the above range, the amount of the catalyst is excessively used and the use of the catalyst for N 2 O reduction This is because it is not efficient.

In one embodiment, the step of drying and firing the ceramic pellet structure (S40) comprises molding the ceramic pellet structure into an appropriate size, drying and firing the ceramic pellet structure, and usually firing at a temperature of 400 to 600 ° C However, it can be fired at different temperature ranges depending on its purpose.

It is to be understood that the present invention is not limited to the above embodiments and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

10: catalyst layer extrusion molding machine 11: catalyst layer extrusion molding machine main body
12: screw for catalyst layer extruder 13: nozzle adapter for catalyst layer extruder
14: Adapter support for catalyst bed extruder
15: nozzle for catalyst bed extruder 16:
20: Protective layer extrusion molding machine 21: Protective layer extrusion molding machine main body
22: Protective layer extruder screw 23: Protective layer extruder nozzle adapter
24: Adapter layer extender for protection layer extruder
25: Protective layer extruder nozzle 26: Nozzle ball
30: Ceramic pellet structure 31: Catalyst layer
32: Protective layer
S100: Manufacturing method of ceramic pellet structure for reducing N 2 O
S10: Step of preparing the catalyst layer clay S20: Step of producing the protective layer clay
S30: Step of molding the ceramic pellet structure
S40: Step of drying and firing the ceramic pellet structure

Claims (8)

A catalyst layer extruder (10) for producing a catalyst layer (31) of the ceramic pellet structure (30); And
And a protective layer extruder (20) for producing a protective layer (32) surrounding the catalyst layer (31) of the ceramic pellet structure (30)
The catalyst layer extrusion molding machine (10)
A catalyst bed extruder main body 11;
A catalyst layer extruder screw (12) for transferring the catalyst layer forming raw material in one direction;
A nozzle adapter (13) for a catalyst layer extruder for supplying a catalyst layer forming material fed by a screw for a catalyst layer extruder to a nozzle (15) for a catalyst layer extruder;
An adapter support (14) for a catalyst layer extruder that maintains a connection between a catalyst layer extruder main body and a nozzle adapter for a catalyst layer extruder; And
And a catalyst layer extruder nozzle (15) for forming a catalyst layer of the ceramic pellet structure,
The protective layer extrusion molding machine (20)
A protective layer extrusion molding machine main body 21;
A protective layer extruder screw 22 for conveying the protective layer forming material in one direction;
A nozzle adapter (23) for a protective layer extruder for supplying a protective layer forming material fed by a screw (22) for a protective layer extruder to a nozzle (25) for a protective layer extruder;
An adapter support 24 for a protective layer extruder that maintains the coupling between the protective layer extrusion molding machine main body 21 and the nozzle adapter 23 for the protective layer extruder; And
And a nozzle (25) for a protective layer extruder forming a protective layer (32) of a ceramic pellet structure,

The protective layer extruder screw 22 is perpendicular to the screw 12 for the catalyst layer extruder so that the protective layer extruder 20 and the catalyst layer extruder 10 are disposed perpendicularly to each other,
The nozzle holes 16 and 26 formed in the catalyst layer extruder nozzle 15 and the nozzle layer 25 for the protective layer extruder are slanted so that they can coincide with the adjacent screws 12 and 22, Wherein the N 2 O reducing ceramic pellet structure manufacturing apparatus It was prepared in the ceramic pellet structure for an N 2 O reduction using the ceramic structural body pellet manufacturing apparatus for the N 2 O reduction in claim 1,
(S10) mixing the catalyst raw material, processing aid, and solvent to prepare catalyst bed clay;
(S20) mixing a ceramic raw material, a processing aid and a solvent to prepare a protective layer clay;
Forming a catalyst layer using the prepared catalyst layer clay and forming a protective layer surrounding the catalyst layer using the prepared protective layer clay to form a ceramic pellet structure (S30); And
(S40) drying and firing the formed ceramic pellet structure,
The above-
(Al), Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, , Zinc (Zn), and magnesium (Mg).
In the ceramic raw material,
At least one zeolite powder selected from the group consisting of Beta (BEA), ZSM-5 (MFI), Mordenite (MOR) and Ferrierite (FER)

The processing aid contained in the step (S10) of producing the catalyst layer clay and the step (S20) of producing the protective layer clay
An organic binder which is at least one selected from the group consisting of ethyl cellulose, methylcellulose group, ethylcellulose derivative and methylcellulose derivative, or
At least one inorganic binder selected from the group consisting of silica sol, zirconia sol, titania sol,
Or both,
The processing aid in the step (S10) of preparing the catalyst layer clay is 1 to 20 parts by weight based on 100 parts by weight of the catalyst raw material,
The processing aid of the step (S20) of producing the protective layer clay is 1 to 20 parts by weight based on 100 parts by weight of the ceramic raw material,

The step of forming the ceramic pellet structure comprises:
(Rr) / r) of the thickness of the catalyst layer (r) to the thickness (Rr) of the catalyst layer is adjusted to 0.1 to 0.5 and the ceramic pellet structure is formed into a cylindrical shape with an outer diameter of 0.5 to 1 cm, The ratio of outer diameter to length is 1: 0.5 ~ 1.5,
The ceramic pellets comprising: a structure, drying and firing (S40) is a process for producing N 2 O abatement ceramic pellets, characterized in that the structure for firing the ceramic pellet structure at a temperature of 400 ~ 600 ℃. delete delete delete delete delete delete
KR1020160020726A 2016-02-22 2016-02-22 Apparatus for manufacturing ceramic pellet structure for reducing nitrous oxide and method for manufacturing ceramic pellet structure for reducing nitrous oxide using the same KR101811375B1 (en)

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