KR101633341B1

KR101633341B1 - Manufacturing Apparatus for N2O Removal Catalyst

Info

Publication number: KR101633341B1
Application number: KR1020150057908A
Authority: KR
Inventors: 장원철; 권원태; 가명진; 이민우; 김진영; 양창희; 김대수
Original assignee: 주식회사 코캣
Priority date: 2015-04-24
Filing date: 2015-04-24
Publication date: 2016-06-27

Abstract

The present invention relates to an apparatus for producing a catalyst for reducing nitrous oxide, comprising: a mixing device in which a mixture is introduced into an upper portion and an outlet is formed in a lower portion; A molding device disposed at a lower end of the mixing device and having a plurality of pressure rollers arranged to shape the plate into a uniform thickness of the mixture introduced from the outlet; And an injection apparatus which is provided with a uniform plate in the molding apparatus, forms a support corresponding to the size of the plate, and has a mold part formed on both sides of the plate to press the support and the mold, The support and the plate are pressed to produce a catalyst in which the support and the plate are integrally formed.

Description

[0001] The present invention relates to a manufacturing apparatus for a nitrous oxide reducing catalyst,

The present invention relates to an apparatus for producing a catalyst for reducing nitrous oxide.

In general, the application field of nitrous oxide (N ₂ O) catalyst has been applied mainly to the production process of adipic acid, caprolactam and nitric acid. At this time, the gas generated mainly by using pellet type is subjected to direct decomposition and catalytic reduction.

(NH3-SCR, Urea-SCR)], a method of not reducing the catalyst [Selective Non-Selective Catalytic Reduction (NOx) -Catalytic Reduction (NH3-SNCR)] has been applied.

Techniques for the treatment of nitrous oxide (N ₂ O) gas for combustion / incineration flue gas and electronics industry and for the production of catalyst bodies for large air volumes are underway.

KR 10-2012-0106370 A

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide a catalyst for reducing nitrous oxide which is applicable to combustion / exhaust gas and electronic industry.

The apparatus for producing a catalyst for reducing nitrous oxide according to the present invention comprises: a mixing device in which a mixture is injected into an upper portion and an outlet is formed in a lower portion; A molding device disposed at a lower end of the mixing device and having a plurality of pressure rollers arranged to shape the plate into a uniform thickness of the mixture introduced from the outlet; And an injection apparatus which is provided with a uniform plate in the molding apparatus, forms a support corresponding to the size of the plate, and has a mold part formed on both sides of the plate to press the support and the mold, It is appropriate that the support and the plate are pressed to produce a catalyst in which the support and the plate are integrally formed.

Further, it is preferable that the mold side surface is formed in a flat plate or concavo-convex shape, and the concavo-convex form is formed in one of a corrugated shape, a triangular shape and a semicircular shape.

In addition, the support may be disposed on one side of the mold parts on both sides, and the support may be detachably attached to one side of the mold, and the support may be formed in a triangular, polygonal, It is appropriate that the side surface of the support is formed in a concavo-convex form.

The mixing device further comprises at least one impeller disposed between the upper part and the lower part, the impeller having an impeller blade formed to rotate and feed the mixture in the direction of the outlet, the impeller blade having an impeller blade It is preferable that a groove is formed.

In addition, a guide plate is formed inside the mixing device so as to have an inclination to guide the mixture toward the discharge port, and the guide plate is suitably disposed between the impeller and the discharge port.

Further, the pressure roller is preferably formed to adjust the thickness of the plate.

It is also preferable that the carrier of the catalyst is formed of a zeolite having a Si / Al ratio of 12.5 to 15 and a specific surface area of 600 m 2 / g to 700 m 2 / g.

Further, the mixture is formed so as to contain a water content of 100 to 140 wt%, 0.5 to 5.0 wt% of iron (Fe), 1.0 to 5.0 wt% of an organic binder and 2.5 to 7.5 wt% of an inorganic binder in comparison with a zeolite carrier .

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

The apparatus for producing a catalyst for reducing nitrous oxide according to various embodiments of the present invention is effective in providing a catalyst for reducing nitrous oxide which is applicable to combustion / exhaust gas and electronic industry.

Also, there is an effect of providing an apparatus for producing a catalyst for reducing nitrous oxide (N ₂ O), which reduces a pressure loss by securing a high geometric specific surface area by pressing a mold part on a plate.

Further, the mold pressing portion on the plate, nitrous oxide (N ₂ O) reduced catalyst provides a catalyst making apparatus for the reduction of nitrous oxide (N ₂ O) to so side is formed by concave and convex form a wider surface area efficiency is increased .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an illustration of an apparatus for producing a catalyst for reducing nitrous oxide according to an embodiment of the present invention; FIG.
Figure 2 is a cross-sectional view of AA for Figure 1;
3 is an exemplary view in which an impeller blade groove is formed in Fig. 1;
4 is an exemplary view of a plate according to an embodiment of the present invention being introduced into an injection apparatus.
5 is an exemplary view in which a side surface of a mold part according to a second embodiment of the present invention is formed in a concavo-convex shape.
Figure 6 is a mixture in actual use according to one embodiment of the present invention.
Figure 7 is an illustration according to a pattern of a support according to an embodiment of the present invention;
Fig. 8 is an example of practical use of a support according to an embodiment of the present invention; Fig.
Fig. 9 is an exemplary view of a honeycomb pattern. Fig.
FIG. 10 is an exemplary view illustrating a catalyst for abatement according to an embodiment of the present invention. FIG.
11 is a catalyst for reducing nitrous oxide produced using an apparatus for producing a catalyst for reducing nitrous oxide according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages, and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. Also, the terms "one side,"" first, ""first,"" second, "and the like are used to distinguish one element from another, no. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, a detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 2 is a cross-sectional view taken along the line AA in Fig. 1, Fig. 3 is an example in which an impeller blade groove is formed in Fig. 1, and Fig. 4 is an enlarged view of Fig. FIG. 5 is a view illustrating an example in which a side surface of a mold unit according to another embodiment of the present invention is formed in a concavo-convex shape. FIG. 6 is a cross- FIG. 7 is a view showing a pattern of a support according to an embodiment of the present invention, FIG. 8 is an example of actual use of a support according to an embodiment of the present invention, and FIG. 9 is a cross- FIG. 10 is a view illustrating an example in which a catalyst for abatement according to an embodiment of the present invention is laminated, and FIG. 11 is a view illustrating an example of a method of manufacturing a catalyst for abatement of nitrous oxide according to an embodiment of the present invention. Which is a catalyst for reducing nitrous oxide.

Referring to FIGS. 1 to 4, a mixing device 100 having a mixture M at its upper portion and an outlet 150 at its lower portion; A plurality of pressure rollers 210 disposed at the lower end of the mixing device M and arranged to form the plate 300 with uniform thickness of the mixture M introduced from the discharge port 150, A uniform plate 300 is supplied from the molding apparatus 200 and a support body 410 is formed corresponding to the size of the plate 300. The support body 410 and the plate 300 And an injection apparatus 400 having a mold part 430 formed on both sides of the plate 300 to press the support body 410. The mold part 430 presses the support body 410 and the plate 300, 410 and the plate 300 are produced.

Referring to FIG. 1, the mixing apparatus 100 conveys the mixture M to the molding apparatus 200. An inlet 110 is formed in the upper portion of the mixing apparatus 100 so that the mixture M is introduced and a lower portion of the mixing apparatus 100 conveys the mixture M to the outlet 150. The inlet 110 is suitably formed such that the mixture is partially opened to be injected at the top. This is not intended to limit the shape of the inlet 110. At this time, it is appropriate that the mixing device 100 is formed in a hopper shape. That is, the bottom area of the mixing device 100 is preferably smaller than the top area. This is because the mixture in which the mixing apparatus 100 is disposed is injected into the outlet 150. In addition, it is appropriate that the guide plate 170 is formed in the mixing apparatus 100. The guide plate 170 is disposed between the discharge port 150 and an impeller 130 to be described later. The guide plate 170 is formed to have a slope in order to guide the mixture m toward the discharge port 150. That is, the guide plate 170 is disposed to be inclined downward from the upper portion. It is appropriate that a plurality of the guide plates 170 are arranged so as to have a slope and the guide plates 170 are uniformly arranged in a fan shape with respect to the discharge port.

Referring to FIG. 2, an impeller 130 is disposed between the upper portion and the lower portion of the mixing device 100. The impeller 130 rotates in the direction of the discharge port 150 to supply the mixture. That is, a plurality of impellers 130 are disposed inside the mixing device 100, and the impeller 130 rotates to inject the mixture M toward the discharge port 150. At this time, it is appropriate that the impeller 130 includes the impeller blade 131 so that the mixture M moves in the direction of the discharge port 150 (see FIG. 2). The impeller blade 131 moves the mixture M toward the discharge port 150 by driving the impeller 130.

As shown in FIG. 3, an impeller blade groove 133 may be formed at the lower end of the impeller blade 131. The impeller blade groove 133 is provided inside the mixing device 133 to increase mixing efficiency. That is, the impeller blade groove 133 is formed by increasing the area in contact with the mixture M, and the impeller blade groove 133 allows the mixture M to mix well with each other.

Referring to FIG. 1, two to eight impellers 130 are disposed inside the mixing apparatus 100. The impeller 130 can adjust the rotational direction and the speed using an electric motor and a stepping motor or the like. The rotational speed of the impeller 130 is suitably set to 10 RPM to 100 RPM. At this time, the rotational speed of the impeller 130 is preferably rotated at 50 RPM. This is to suppress the mixture M from blowing to the outside.

It is preferable that four impellers 130 are disposed inside the mixing device 100. The impeller 130 injects the mixture M in the direction of the outlet 150. For example, as shown in FIG. 1, when the left impeller 130 rotates clockwise, the right impeller 130 rotates counterclockwise. This is because the impeller 130 also distributes the mixture M evenly inside the mixing apparatus 100 by using the impeller blades 131.

Referring to Fig. 6, the mixture (M) uses a mixture of catalyst raw materials. The proportion for producing the catalyst compact of the mixture (M) must take into consideration the moldability and the strength. The mixture (M) has a water content of 100 to 140 wt%, a catalyst active material Fe of 0.5 to 5.0 wt%, an organic binder of 1.0 to 5.0 wt%, and an inorganic binder of 2.5 to 7.5 wt%, as compared with the zeolite carrier. If the moisture content exceeds 140 wt%, severe cracks will occur on the surface due to shrinkage after drying / firing, and if it is less than 100 wt%, dust will be generated severely in the molded body after molding and easily broken. When the content of the active material iron (Fe) is 0.5 wt% or less, the activity is not exhibited. When the content of the active material iron (Fe) is 5.0 wt% or more,

Also, the components corresponding to the zeolite component are 35 to 55 wt%, the moisture content is 40 to 65 wt%, the Fe content is 0.1 to 5 wt%, the organic binder component is 0.1 to 10 wt%, and the inorganic binder component is 0.1 to 10 wt% . In the case of zeolite, a suitable type is applicable to a silicon / aluminum (Si / Al) ratio of 12.5 or more, and a de-aluminized carrier is more preferable.

The water content of the mixture (M) is preferably in the range of 50 to 60 wt%. If the content of the mixture (M) is less than 50%, the formation of the catalyst becomes difficult and the dust is removed from the catalyst after the catalyst is formed. .

When the water content of the mixture (M) is 60% or more, slushing starts to occur, and the strength rapidly decreases due to severe cracking after molding. It is more preferable that the iron (Fe) content of the mixture (M) is 1.0 to 3.0 wt%, and when the iron (Fe) content is 1.0 wt% or less, sufficient N ₂ O reduction rate If it is 5.0 wt% or more, an excessive amount of active material is carried and the catalyst activity starts to decrease.

Addition of the mixture (M) In the case of the organic binder, methyl cellulose, carboxymethyl cellulose sodium salt, carboxymethyl cellulose calcium salt, hydroxyethyl cellulose, polyethylene glycol, And starch, and more preferably 1.0 to 3.0 wt%, and when it is 3.0 wt% or more, the strength of the catalyst starts to decrease, which is not preferable. In the case of organic binders, the application of methyl cellulose is more suitable for moldability.

Bentonite, kaolin, alumina sol and silica sol can be used in the case of the inorganic binder of the mixture (M), more preferably 3.0 to 5.0 wt%, and more preferably 5.0 wt% , The strength of the catalyst starts to decrease, which is not preferable. In the case of inorganic binders, kaolin and silica sol are more suitably formable.

Referring to Fig. 1, the molding apparatus 200 molds the mixture M to a constant thickness. That is, the molding apparatus 200 forms the mixture M with the plate 300. [ The molding apparatus 200 is formed at the lower end of the discharge port 150. The molding apparatus 200 shapes the mixture M discharged from the discharge port 150 to a constant thickness. The molding apparatus 200 has a plurality of pressure rollers 210 disposed at a lower end of the discharge port 150.

It is appropriate that the molding apparatus 200 is formed continuously at the lower end of the discharge port 150. That is, it is appropriate that the first pressure roller 211, the second pressure roller 212, and the third pressure roller 213 are disposed at the lower end of the discharge port 150. That is, the forming apparatus 200 is formed by disposing a first pressing roller 211, a second pressing roller 212, and a third pressing roller 213 on the lower end of the discharge port 150 sequentially.

The first pressure roller 211 is disposed at the lower end of the discharge port 150. The first pressurizing roller 211 primarily forms the mixture M discharged from the discharge port 150 into the plate 300. The plate 300 has a certain thickness through the second pressure roller 212 and the third pressure roller 213. [ At this time, it is appropriate that the thickness T of the plate 300 is formed to be 0.5 mm to 3 mm at the time of passing through the third pressure roller 213. That is, the first pressure roller 211, the second pressure roller 212, and the third pressure roller 213 adjust the intervals of the rollers to make the thickness of the plate 300 constant. It is noted that the first pressurizing roller 211, the second pressurizing roller 212 and the third pressurizing roller 213 can adjust the roller interval by a sliding method.

The cutting unit 230 may be formed at the lower end of the molding apparatus 200. The cutting portion 230 cuts the plate 300 to a predetermined size. That is, the cutting unit 230 cuts uniformly in order to insert the plate 300 into an injection apparatus to be described later. At this time, it is appropriate that the size of the plate 300 is formed in the size of the width × length (450 mm × 600 mm). This is not to limit the size of the plate 300.

Referring to FIG. 4, the injection apparatus 400 supports and fixes the plate 300 of a predetermined size. The injection apparatus 400 is provided with a uniform plate 300 in the molding apparatus 300 and a support 410 corresponding to the size of the plate 300. The support 410 and the plate 300 And a mold unit 430 is disposed on both sides of the plate 300 to press the mold unit 430.

The mold part 430 presses the support body 410 and the plate 300 (see FIG. 4A). The mold part 430 produces a catalyst in which the support body 410 and the plate 300 are integrally formed (see FIG. 4B). The mold part 430 is formed so as to face the support body 410 and the plate 300, respectively. That is, a pair of mold parts 430 are arranged on both sides of the plate 300, and the mold part 430 presses the support body 410 and the plate 300. At this time, the side surface of the mold part 430 is formed of a flat plate (see FIG. 4) or a concavo-convex form (see FIG. 5).

When the side surface of the mold part 430 is a concavo-convex shape, it may be formed in various shapes such as a wave shape, a triangular shape, a semicircular shape, and the like. The size of the mold part 430 is formed corresponding to the support body 410 and the plate 300 to be described later. It is appropriate that the flat plate and the concave-convex form of the mold part 430 are formed so as to be changeable according to circumstances.

The mold unit 430 is connected to a driving unit 450 for moving the mold unit 430 toward the plate 300. It is appropriate that the driving unit 450 uses a cylinder, an electric motor, and a hydraulic device. At this time, the driving unit 450 advances the mold unit 430 to press the surface of the plate 300. At this time, it is appropriate to set the pressure formed on the mold part 430 and the plate 300 to 10 to 150 bar. The mold part 430 forms the plate 300 in the form of a flat plate or concavo-convex shape. At this time, as shown in FIG. 11, the plate 300 is pressed by the mold part 430 to produce a catalyst having a planar shape and a concavo-convex shape. In other words, it can be produced as a flat plate and a concave / convex plate depending on the shape of the mold part 430, respectively.

The mold part 430 has a corrugated-plate pattern having a specific surface area higher than that of the honeycomb pattern. That is, to reduce the reduction efficiency of nitrous oxide (N ₂ O) due to the high specific surface area of the mold part 430.

Describing the corrugated-plate pattern in more detail with respect to the specific surface area of the honeycomb pattern,

When the specific surface area of the reference catalyst (150 mm x 150 mm x 500 mm) is calculated using a honeycomb pattern (see FIG. 9) and a corrugated (Corrugated-Plate see FIG. 10) Respectively.

1) Honeycomb pattern catalyst

- Standard catalyst size: 150 mm x 150 mm x 500 mm (W x D x L)

- Reference catalyst cell (Cell) specification: 40 x 40

- Based on 1 cell (Cell) Internal standard: 3.2㎜ × 3.2㎜ (d, horizontal and vertical)

- Wall Thickness (OWt): 1 mm

- Wall Thickness (IWt): 0.5 mm

The specific surface area of the honeycomb pattern is obtained as follows.

- Calculated specific surface area (Ah): 4 (tetragonal) x [3.2 / 1000 (d length in m unit conversion)] [500/1000 ) = 10.24 ㎡

2) Corrugated-plate pattern catalyst>

- Standard catalyst size: 150 mm x 150 mm x 500 mm (W x D x L)

- Number of plates (n _p ): 36, Number of waveforms (n _c ): 36

- d (length of one side of acid): 5 mm

- Number of waveforms per plate type (N): 21

- thickness of plate (T): 0.6 mm

The specific surface area of the corrugated plate is obtained as follows.

Calculated specific surface area (Ap): [5 (length of one side) × 2 (one side consists of two sides) / 1,000 (length d: (Plate shape is composed of two surfaces) × 500/1000 (L length: converted in m unit) × 36 (nc: number of corrugated plates) + 0.15 (width of plate) × 2 (Number of plate-like plates) = 12.96 < RTI ID = 0.0 > m2 <

The honeycomb pattern had a specific surface area of 10.24, and a corrugated-plate pattern had a specific surface area of 12.96. That is, it can be seen that the Corrugated-Plate pattern has a higher specific surface area than the Honeycomb pattern.

In the case of a corrugated-plate pattern, the specific surface area is increased to 6% when T = 0.54 mm and d = 6 mm. In this case, the open rate of the corrugated-plate pattern is 74%, which is higher than that of the honeycomb pattern. A high open rate is advantageous in reducing pressure loss. That is, it can be seen that the efficiency of the catalyst of the plate 300 is improved when the plate-shaped plate and the uneven plate are stacked.

Referring to FIG. 7 or 8, the support body 410 is inserted into the plate 300 by the pressing of the mold part 430. The support (410) supports the pressure transferred to the plate (300). It is appropriate that the support body 410 is formed to be replaceable corresponding to the mold part 430.

The support 410 is disposed on one side of the plate 300. That is, the support 410 is disposed between the plate 300 and the mold part 430 (see FIG. 4 or 5). The support 410 is inserted into the plate 300 to fix the frame (see FIG. 4B).

The support body 430 may be formed with a flat plate pattern such as a quadrangle (see Fig. 7A), a hexagon (see Fig. 7B), a rhombus (see Fig. 7C), a triangle, a wavy pattern and a semicircular pattern.

The supporting body 410 is formed in a pattern such as a quadrangle, a hexagon, a rhombus (see FIG. 8A), a polygon, a triangle, (See FIG. 8B). That is, the support body 410 may be patterned in a three-dimensional pattern on a plane and a side surface.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.

M: Mixture 1: Catalyst for reducing nitrous oxide
100: mixing device 110: inlet
130: impeller 131: impeller blade
133: impeller blade groove 150: outlet
170: guide plate 200: molding device
210: pressure roller 211: first pressure roller
212: second pressure roller 213: third pressure roller
230: cutting portion 300: plate
400: Injection device 410: Support
430: mold part 450: driving part

Claims

A mixing device in which a mixture is injected into an upper portion and an outlet in a lower portion;
A molding device disposed at a lower end of the mixing device and having a plurality of pressure rollers arranged to shape the plate into a uniform thickness of the mixture introduced from the outlet; And
And an injection device provided with a mold part on both sides of the plate for pressing the support and forming a support corresponding to the size of the plate,
Wherein the mold part presses the support and the plate to produce a catalyst in which the support and the plate are integrally formed.

The method according to claim 1,
Wherein the mold side surface is formed in a flat plate or concavo-convex shape.

The method of claim 2,
Wherein the concavo-convex form is formed in one of a corrugated, triangular and semicircular form.

The method according to claim 1,
Wherein the support is disposed on one side of the mold parts on both sides, and the support is detachably attached to one surface.

The method according to claim 1,
Wherein the support is formed in a triangular shape, a polygonal shape, a wavy shape, and a semicircular shape in plan view, and the side surface of the support is formed in a concavo-convex shape.

The method according to claim 1,
Wherein the mixing apparatus has at least one impeller disposed between an upper portion and a lower portion,
Wherein the impeller is formed with an impeller blade to rotate and feed the mixture in the direction of the outlet.

The method of claim 6,
Wherein the impeller blade has an impeller blade groove formed at a lower end thereof to contact the mixture.

The method of claim 6,
A guide plate is formed inside the mixing device so as to have a slope to guide the mixture in the direction of the discharge port,
Wherein the guide plate is disposed between the impeller and the outlet.

The method according to claim 1,
Wherein the pressure roller is formed to adjust the thickness of the plate.

The method according to claim 1,
Wherein the support of the catalyst is formed of a zeolite having a Si / Al ratio of 12.5 to 15 and a specific surface area of 600 to 700 m 2 / g.

The method according to claim 1,
The mixture is formed so as to contain a moisture content of 100 to 140 wt%, 0.5 to 5.0 wt% of iron (Fe), 1.0 to 5.0 wt% of an organic binder, and 2.5 to 7.5 wt% of an inorganic binder, relative to a zeolite carrier Characterized in that the catalyst is a catalyst.