KR20200000730A - Selective catalytic reduction apparatus - Google Patents

Abstract

The purpose of the present invention is to provide a selective catalytic reduction apparatus which expands contact area between a catalyst and gas in a limited space and improves flow of the gas. According to an embodiment of the present invention, the selective catalytic reduction apparatus includes: an inflow part which is formed in the form of a duct extended from one end to the other end, and includes inclined plates disposed to be vertically separated from one another in an inner space of the inflow part; a mixing part of which one end is coupled to the other end of the inflow part, and both ends are opened to the outside; a distribution part of which one end is coupled to the other end of the mixing part and the other end is bent and extended toward one side, and which has the inside divided into a plurality of spaces; a diffusion part of which one end is coupled to the other end of the distribution part and which is formed to be expanded and extended toward the other end thereof; and a catalyst part of which one end is coupled to the other end of the diffusion part and the other end is coupled to an outlet, and in an inner space of which catalyst units formed to be adjacent to the other end of the catalyst part are included, wherein the catalyst units are formed to be bent in a zigzag shape toward one end and the other end of the catalyst, be extended toward the lower part, be coupled to the catalyst part, and separate the inner space of the catalyst part in a state that the catalyst units are coupled to one another. The selective catalytic reduction apparatus is operated as a high efficiency SCR apparatus in a small space since a catalyst of the catalyst part comes into contact with a relatively large amount of gas.

Description

Selective Catalytic Reduction Device {SELECTIVE CATALYTIC REDUCTION APPARATUS}

Disclosed herein is a selective catalytic reduction apparatus, and relates to a selective catalytic reduction apparatus for removing nitrogen oxides through a catalyst.

Unless otherwise indicated herein, the contents described in this identification are not prior art to the claims of this application and the description in this identification is not admitted to be prior art.

Recently, as part of efforts to reduce the emission of air pollutants that cause fine dust in Korea, pollution regulations have been strengthened by amending and amending related laws and enforcement regulations.

Selective catalytic reduction (SCR) systems and selective non-catalytic reduction (SNCR) systems are typically used as post-treatment facilities that treat nitrogen oxide, a representative air pollutant.

When the SCR device is installed in the existing facility, the SCR catalyst is in close contact with the inlet side of the gas discharged to the outside, and the contact area between the gas and the catalyst in the limited space is relatively low, thereby reducing the efficiency of removing nitrogen oxides.

In this regard, Korean Patent Publication No. 10-1561260 discloses a minimum area installation SCR reactor, and Korean Patent Publication No. 10-0983635 discloses a channelized year of a catalytic reduction reactor.

However, existing technologies do not disclose a structure in which the contact area between the catalyst and the gas is expanded and the gas flow is improved in a limited space.

An object of the present invention is to provide a selective catalytic reduction device that expands the contact area between the catalyst and the gas in a limited space and improves the flow of the gas.

In addition, the present invention is not limited to the above-described technical problems, and it is apparent that other technical problems may be derived from the following description.

According to an embodiment of the present disclosure, the selective catalytic reduction device is formed in the form of a duct extending from one end to the other end, the inlet including an inclined plate disposed to be spaced apart from each other in the inner space, one end is at the other end of the inlet Mixing portion coupled and open at both ends to the outside, one end is coupled to the other end of the mixing portion, the other end is bent and extended toward one side and the inner portion is formed to be partitioned into a plurality of spaces, one end the other end A diffusion part coupled to the other end and extending toward the other end, and having one end coupled to the other end of the diffusion part and the other end coupled to the outlet, and having a catalyst part including a catalyst unit formed adjacent to the other end in the inner space. The catalyst units are bonded to each other and bent in a zigzag form toward one end and the other end of the catalyst unit. It extends toward the in combination with the catalytic portion is formed to separate the inner space of said catalyst.

In addition, each of the catalyst units may include a catalyst plate and a guide, one end of the catalyst plate is disposed toward the distribution portion, and the other end of the catalyst plate is formed to extend toward the outlet. Here, one end of the guide may be disposed to be spaced apart from the catalyst plate on one end of the catalyst plate, and the other end of the guide may be inclined toward the other end of the catalyst plate to be combined with the other end of the catalyst plate.

In addition, the catalyst units may be laminated with one end of one of the catalyst plates of any one of the catalyst units having one end of the guide disposed thereon.

In addition, the mixing unit may include a reducing agent inlet formed to open and close a portion of the outside and nozzles disposed in the inner space of the mixing unit through the reducing agent inlet for spraying the reducing agent.

In addition, one end of the mixing portion is coupled to the inner surface of the mixing portion, the other end extends toward the center of the distribution portion and the guide unit and one end of the concave curved surface formed toward the inside of the mixing portion is coupled to one end of the lower end of the guide unit The other end may further include a separation plate extending toward an upper portion of the guide unit, coupled to an upper end of the guide unit, and having inclined surfaces extending toward both sides of the distribution unit on both sides.

In addition, one end of each of the distribution parts may be disposed to be spaced apart from each other on one end of the distribution part, and the other end may include curved guide plates extending to form a curved surface parallel to each other toward one end of the diffusion portion.

In addition, the diffusion part may include a plurality of diffusion plates formed to be inclined to extend upward from one end to the other end of the diffusion part in an inner space, and the diffusion plates may increase inclination angle as disposed above.

According to one embodiment of the present disclosure, the selective catalytic reduction apparatus has an advantage of removing the nitrogen oxide in a limited space by uniformly diffuse the gas toward the catalyst plate after mixing the incoming gas.

In addition, the selective catalytic reduction device has the advantage that the efficiency of reacting to the catalyst plate is produced to have a large surface area of the gas is uniformly diffused by mixing the incoming gas and adjusting the movement path to reduce the gas.

In addition, the selective catalytic reduction device has the advantage that the guides for guiding the movement of the gas between the catalyst plates are formed to be inclined to increase the contact area of the gas and the catalyst plate, the nitrogen oxide removal effect is improved.

In addition, since the effects of the present invention described above are naturally manifested by the configuration of the described contents irrespective of whether or not the inventor recognizes them, the above-described effects are only some effects according to the described contents, and all effects that the inventors grasp or actually exist. It should not be accepted that it is listed.

In addition, the effects of the present invention should be further grasped by the entire description of the specification, even if not described in explicit sentences even those having ordinary skill in the art to which the description belongs belong Any effect that can be recognized as should be seen as an effect described herein.

1 is an image showing a flow analysis result of a conventional selective catalytic reduction device.
2 is a perspective view of a selective catalytic reduction apparatus in accordance with one embodiment of the disclosure disclosed herein.
3 is a perspective view of a portion of the selective catalytic reduction device of FIG. 2;
4 is a perspective view and a bottom view of the guide unit and the separator of the selective catalytic reduction device of FIG.
5 is a cross-sectional view taken along the line II ′ of the selective catalytic reduction device of FIG. 2.
6 is a cross-sectional view taken along the line II-II 'of the selective catalytic reduction device of FIG.
7 is an image showing the results of flow analysis of the selective catalytic reduction device of FIG.
8 is a perspective view of a selective catalytic reduction apparatus according to another embodiment of the disclosure disclosed herein.
9 is a perspective view of a selective catalytic reduction apparatus according to another embodiment of the disclosure disclosed herein.

Hereinafter, with reference to the accompanying drawings looks at the configuration, operation and effect of the selective catalytic reduction device according to a preferred embodiment. For reference, in the following drawings, each component is omitted or schematically illustrated for convenience and clarity, the size of each component does not reflect the actual size, and the same reference numerals throughout the specification refer to the same component. Reference numerals for the same components will be omitted in the individual drawings.

Figure 1 shows an image showing the results of the flow analysis of the conventional selective catalytic reduction apparatus.

As shown in FIG. 1, the conventional selective catalytic reduction apparatus 1 includes an injection port 2 through which gas is introduced, a catalyst part 4 for removing nitrogen oxides from the gas, and a gas discharged from the catalyst part 4. A connecting portion 6 forming a moving space and a discharge port 8 through which gas is discharged are formed.

In the selective catalytic reduction apparatus 1, the positions of the injection section 2 and the catalyst section 4 are adjacent to each other, so that the gas moves directly to the catalyst section 4, but the space other than the catalyst section 4 is relatively limited in a limited space. As a result, it is necessary to improve the nitrogen oxide removal effect through space utilization.

The catalyst part 4 is formed to be connected to the inlet 2, and the space of the connection part 6 formed between the catalyst part 4 and the outlet 8 is utilized only as a space for moving the gas from which nitrogen oxide has been removed. Therefore, a method of effectively utilizing the space of the connecting portion 6 is required.

Also, referring to the flow analysis result, the velocity (about 13.901 m / s) inside the catalyst portion 4 of the gas flowing in the inlet 2 is greater than the velocity (about 4.8139 m / s) inside the connecting portion 6. It is relatively high, it can be seen that the speed of the gas discharged through the outlet 8 (about 13.901 m / s) is also relatively higher than the speed inside the connection (6).

As a result, the nitrogen oxide removal efficiency is reduced due to the relatively high speed in the space where the gas and the catalytic part 4 need to be contacted, and the gas discharged from the catalyst part 4 is stagnated through the connecting part 6 and then the outlet port 8 Since it is discharged through), a technique for reducing the speed of the gas in the space requiring the contact of the gas and the catalyst unit 4 at the same time as the utilization of the space corresponding to the connecting portion (6).

2 shows a perspective view of a selective catalytic reduction apparatus according to one embodiment of the disclosure disclosed herein. 3 shows a perspective view of a portion of the selective catalytic reduction apparatus of FIG. 2.

As shown in FIGS. 2 and 3, the selective catalytic reduction apparatus 100 includes an inlet 200, a mixing unit 300, a distribution unit 400, a diffusion unit 500, a catalyst unit 600 and an exhaust. A portion 700 is included.

The selective catalytic reduction device 100 mixes and separates the gas flowing from the inlet 200 and moves it toward the catalyst 600 to guide a uniform amount of gas to various locations of the catalyst 600. In addition, the area of the catalyst unit 600 is expanded as much as possible to improve the nitrogen oxide removal effect.

In detail, the inlet 200 includes a frame 220 and an inclined plate 240.

One end of the inlet 200 is connected to the combustion device, and the other end is formed to be inclined toward the front upper portion.

The inlet 200 separates the gas flowing from the combustion device including the boiler for discharging the gas into the upper and lower portions through the plurality of inclined plates 240 to induce the movement of the gas toward the mixing unit 300.

One end of the frame 220 is connected to the combustion device, and the other end of the frame 220 is inclinedly extended toward the upper front to be coupled to one end of the mixing part 300, and a hollow in which gas can move is formed.

One end of each of the inclined plates 240 is coupled to one inner side surface of the frame 220, and the other end extends to the other end of the frame 220 in the extending direction of the frame 220, with a predetermined interval between the upper and lower parts. Are spaced apart.

Therefore, the gas flowing into the inlet 200 decreases in speed while moving toward the mixing unit 300 in a state separated by the inclined plates 240 up and down, and the gas flows to one side inside the frame 220. Prevents bias

Mixing unit 300 is formed in the form of a duct, one end is connected to the other end of the inlet 200, the gas discharged from the inlet 200 is introduced, a predetermined space so that the inlet gas can be mixed with each other Is formed.

In detail, the mixing part 300 includes a frame 320, a guide unit 340, a separator plate 360, a reducing agent inlet 370, and nozzles 375.

Frame 320 is formed in the form of a duct, the cover is detachable or attachable to one side is coupled to open the internal space of the frame 320 to one side, the reducing agent inlet 370 is formed on the gas to be mixed It is possible to effectively add a reducing agent.

The nozzles 375 spray the reducing agent (ammonia) supplied through the pipe from the outside inside the frame 320 to uniformly spread the reducing agent on the gas mixed inside the frame 320.

The nozzles 375 are arranged to be spaced apart from each other at equal intervals from the top and the bottom through a pipe extending downward from the inside of the frame 320 through the reducing agent inlet 370 to effectively inject the reducing agent into the gas.

One end of the frame 320 is coupled to be connected to the other end of the frame 220, and the other end is extended toward the front to be coupled to connect the one end of the distribution unit 400 and the internal space.

The guide unit 340 is formed in a rectangular shape to be coupled to the inside of the other end of the frame 320, the separating plate 360 is coupled to the guide unit 340 in the form of connecting the upper and lower center of the guide unit 340. do.

Therefore, the gas mixed with each other in the mixing unit 300 is separated to both sides through the separating plate 360 to move toward the distribution unit 400, the guide unit 340 is coupled to the inside of the frame 320 To stably support the separator 360.

In addition, the separating plate 360 prevents the gas mixed in the inner space of the frame 320 from excessively concentrated in the center of the distribution unit 400 while passing through the guide unit 340, thereby distributing the gas 400. Guide to move evenly to both sides of the.

The distribution unit 400 includes a frame 420, a first curved guide plate 430, and a second curved guide plate 440.

One end of the distribution unit 400 is coupled so that the other end and the inner space of the mixing unit 300 is connected, the other end is bent and extended toward one side is coupled so that one end and the inner space of the diffusion unit 500 is connected.

Frame 420 is formed in the form of a duct is coupled to one end is connected to the frame 320, the other end is bent and extended toward one side, there are three spaces formed in the inner space of the frame 420 in the left and right direction First and second curved guide plates 430 and 440 are partitioned so as to be formed.

One end of the first curved guide plate 430 is formed in the form of a plate connecting the upper and lower ends of the frame 420 at a position adjacent to one side of one end of the frame 420, the other end along the bending direction of the frame 420 It extends to divide the internal space of the frame 420 into two spaces.

One end of the second curved guide plate 440 is formed in the form of a plate connecting the upper and lower ends of the frame 420 at a position adjacent to the other side of one end of the frame 420, the other end is the bending direction of the frame 420 It extends along and partitions the space located on the other side of the first curved guide plate 430 into two spaces.

Accordingly, each of the first and second curved guide plates 430 and 440 divides the inner space of the frame 420 into three spaces of one side, the other side, and the center of the inner space of the frame 420, and the separation plate 360. The gas introduced through the separation is separated through the first and second curved guide plates 430 and 440 to move toward the diffusion part 500.

4 is a perspective view and a bottom view showing the guide unit and the separator of the selective catalytic reduction device of FIG.

Specifically, the guide unit 340 is formed in a rectangular shape to be coupled to the inside of the other end of the frame 320, one end of the edge of the guide unit 340 is coupled to the inner surface of the frame 320 and the other end is mixed portion 300 The inner surface of the rim is extended toward the center of the other end of the) so that the curved surface protrudes concave toward one end of the mixing part 300.

The separation plate 360 has a central portion protruding toward one end of the mixing portion 300, and both sides of the separation plate 360 extend inclined toward the distribution portion 400 from the central portion so that both sides are bent toward the distribution portion 400.

One end of the separating plate 360 is coupled to one end of the guide unit 340 at one end of the lower end of the guide unit 340, the other end is extended toward the upper side of the guide unit 340 at both ends of the guide unit 340 Is coupled to one end of 340.

Accordingly, the gas introduced into and mixed with the mixing unit 300 is separated into both sides by the inclined surfaces formed on both sides of the separating plate 360 and the curved surface formed on the edge of the guide unit 340, thereby distributing the distribution unit 400. Move toward.

FIG. 5 illustrates a cross-sectional view taken along line II ′ of the selective catalytic reduction device of FIG. 2. FIG. 6 is a cross-sectional view taken along the line II-II 'of the selective catalytic reduction device of FIG.

As shown in FIGS. 1 to 6, the diffusion part 500 includes a frame 520, a first diffusion plate 540, a second diffusion plate 542, and third diffusion plates 544.

One end of the diffusion part 500 is coupled to the other end of the distribution part 400 so as to be connected to the internal space of the distribution part 400, and the upper end thereof is extended and extended toward the other end so that the one end and the internal space of the catalyst part 600 are extended. Combined to connect.

Frame 520 is formed in the form of a duct, one end is coupled to the other end of the distribution unit 400, the other end is extended and extended toward the catalyst unit 600 to form an inclined surface toward one side and the upper surface and both sides.

The first diffuser plate 540 is formed in the lower portion of the inner space of the diffuser 500, one end is coupled to the frame 520 at a position adjacent to the distribution unit 400, and the other end is an extension direction of the frame 520. Extends obliquely toward the top.

The inner space of the frame 520 is divided into a space below the first diffuser plate 540 and a space above the first diffuser plate 540 through the first diffuser plate 540.

The second diffuser plate 542 is spaced apart from the upper portion of the first diffuser plate 540, one end is coupled to the frame 520 at a position adjacent to the distribution unit 400, and the other end thereof is an extension direction of the frame 520. Along the inclined angle of the first diffusion plate 540 is inclined toward the upper portion.

The internal space of the frame 520 is a space below the first diffusion plate 540 through the first and second diffusion plates 540 and 542, and between the first diffusion plate 540 and the second diffusion plate 542. The space is partitioned into a space formed above the second diffusion plate 542.

The third diffuser plate 544 is spaced apart from the upper portion of the second diffuser plate 542, one end is coupled to the frame 520 at a position adjacent to the distribution unit 400, and the other end thereof is an extension direction of the frame 520. Along the inclined angle of the second diffusion plate 542 is extended inclined toward the upper at an angle relatively higher.

Therefore, the internal space of the frame 520 is partitioned into four spaces through the first to third diffusion plates 540, 542, and 544, and the gas introduced from one end of the diffusion portion 500 passes through the four spaces. They are separated from each other and spread and move toward one side.

In addition, the gas flowing into the diffusion part 500 is uniformly dispersed in the upper portion through the first to third diffusion plates 540, 520, and 544, the inclination angle of which is increased as it is disposed above, and moves toward one side. do.

The catalyst unit 600 includes a frame 620 and catalyst units 630, and the catalyst unit 630 includes a catalyst plate 640 and a guide 660.

One end of the catalyst unit 600 is coupled to the other end of the diffusion unit 500 so that the internal spaces are connected to each other, and the other end thereof is extended toward one side so that the one end and the internal space of the outlet part 700 are connected to each other.

Frame 620 is formed in the shape of a rectangular duct, one end is coupled to the other end of the frame 520, the other end is extended toward one side is coupled to the discharge portion 700.

Catalytic units 630 are disposed to be adjacent to the discharge part 700 in the inner space of the frame 620, and are coupled to each other toward the top from the bottom of the inside of the frame 620 is introduced from one end of the frame 620 Separating the space that the gas moves toward the discharge portion 700.

The catalyst units 630 are formed in a form in which the upper end is reciprocally moved in a zigzag form toward one end or the other end of the frame 620 in a state in which the upper end is coupled to the upper part of the frame 620 in the frame 620. do.

Each of the catalyst plates 640 is formed in a plate shape extending toward the other side so as to be parallel to the bottom of the frame 620, and each end of the catalyst plates 640 is spaced apart from the diffusion part 500 by a predetermined distance. And the other end is extended to a position adjacent to the discharge part 700 and then coupled to the frame 620.

Each of the catalyst plates 640 is spaced apart from each other by a predetermined distance from the bottom of the frame 620 to the upper portion, each of the guides 660 is a catalyst plate 640 between each of the catalyst plates 640 ) To block the space in which the gas moves toward the outlet 700.

Specifically, one end of each of the guides 660 is disposed to be spaced apart from the upper end of each one of the catalyst plates 640, each other end is inclined toward the lower side of the one side where the discharge portion 700 is located, the catalyst plate 640 Is coupled to the other end of

One end of the separate guide 660 is coupled to one end of the catalyst plate 640 located at the lower portion of the catalyst unit 600, extends toward one lower side thereof, and is coupled to the bottom surface of the frame 620, and is located at the top. One end of the guide 660 of the catalyst unit 630 is coupled to the upper portion of the frame 620 to separate the discharge space 20 adjacent to the discharge portion 700 and the inlet space 10 adjacent to the diffusion portion 600 from each other. do.

The gas moving toward the outlet 700 along the bottom of each of the guides 660 is in contact with the top surface of each of the catalyst plates 640 to remove nitrogen oxide through the reaction, the gas is removed It passes through the catalyst plates 640 and moves toward the outlet 700.

Therefore, each of the guides 660 is uniformly distributed from the diffusion portion 700 to the upper and lower portions to guide the gas flowing into the upper surface of the catalyst plate 640 to improve the contact area between the gas and the catalyst plate 640. Catalysis is improved.

In addition, each of the catalyst plates 640 is disposed on one side of the frame 620 adjacent to the discharge part 700 having a relatively large space, thereby effectively removing nitrogen oxide through a relatively larger surface area than the catalyst part 4 of FIG. 1. There is a possible advantage.

Meanwhile, in the case of a separate guide 660 coupled to the bottom of the catalyst unit 600, the gas moving toward the discharge unit 700 along the bottom of the catalyst unit 600 is replaced by the catalyst plate 640. It is possible to prevent stagnation on the bottom of 600.

The discharge part 700 is coupled so that one end is connected to the other end of the catalyst unit 600 and the inner space, and the other end is reduced and extended to be connected to the outer space.

7 and 8 show images showing the results of flow analysis of the selective catalytic reduction device of FIG.

As shown in FIGS. 7 and 8, the velocity of the gas flowing into the inlet 200 decreases gradually while moving the mixing unit 300, the distribution unit 400, and the diffusion unit 500, and the diffusion unit. In the space between the 500 and the catalyst unit 630 in the catalyst unit 600 is uniformly diffused and moves.

In particular, while the gas is bypassed and moved through the mixing unit 300, the velocity is first decreased, and then the velocity is significantly reduced while being diffused and moved by the first to third diffusion plates 540, 542, and 544. By the speed of the gas is smoothly introduced into the space between the catalyst plates 640 to effectively remove the nitrogen oxides.

In addition, the gas velocity (about 5.1189 m / s) in the catalyst portion 600 of FIG. 7 is relatively higher than the velocity of gas moving in the catalyst portion 4 of FIG. 1 (about 13.901 m / s). Since it is significantly low, there is an advantage that the reaction of the gas flowing into the catalyst plate 640 is sufficiently sustained.

8 shows a perspective view of a selective catalytic reduction apparatus according to another embodiment of the disclosure disclosed herein.

The selective catalytic reduction apparatus 120 according to the present embodiment is substantially the same as the selective catalytic reduction apparatus 100 of FIGS. Description is omitted.

As shown in FIG. 8, the selective catalytic reduction apparatus 120 further includes a lifting unit 800, and the lifting unit 800 includes a motor 820, a sliding bar 840, a spring 860, and a flow rate detection. Sensor 880.

The lifting unit 800 is coupled to one end of each of the catalyst plates 640 at one inner side of the frame 620 to raise or lower one end of the catalyst plate 640 by driving a portion of the catalyst plate 640.

As the gas moves toward the discharge part 700 through the driving of the elevating part 800, the upper surface of the catalyst plate 640 having one end disposed downward relative to the other end instead of the guides 660 to form an inclined surface. Since the primary contact with and the gas moving at a relatively low speed has the advantage that the nitrogen oxide removal effect is improved.

In this case, opposite ends of each of the catalyst plates 640 are coupled to be rotatable with both sides of the frame 620 so that one end of the catalyst plate 640 is moved upward or downward about the other end of the catalyst plate 640. This is possible.

Specifically, the motor 820 is formed on the lower side of the inside of the frame 620, one end of the sliding bar 840 is gear-coupled through a gear box separate from the drive shaft of the motor 820, the other end is It extends upward and is coupled to one end of each of the catalyst plates 640.

The sliding bar 840 is disposed on the bottom surface of the catalyst plate 640 of the spring 860 so that the sliding bar 840 temporarily moves upward when the sliding bar 840 is temporarily lowered. Elastically move upwards.

The flow rate sensor 880 is attached to the inlet part 200, the mixing part 300, the distributing part 400, the diffusion part 500, or the catalyst part 600, and is connected to the motor 820 to provide the gas. When the speed is relatively low, the motor 820 is driven to move the sliding bar 840 downward.

Therefore, the selective catalytic reduction device 120 has an advantage of continuously maintaining the removal effect of nitrogen oxides according to the moving speed of the gas through the driving of the lifting unit 800.

9 shows a perspective view of a selective catalytic reduction apparatus according to another embodiment of the disclosure disclosed herein.

The selective catalytic reduction apparatus 140 according to the present exemplary embodiment is substantially the same as the selective catalytic reduction apparatus 100 of FIGS. 1 to 7 except for the catalyst unit 900, and thus, the same reference numerals and names are used, and duplicated. Description is omitted.

As shown in FIG. 9, the selective catalytic reduction apparatus 140 includes a catalyst unit 900.

The catalytic part 900 has a structure in which the gas flowing therein can be smoothly moved toward the discharge part 700 so that the catalytic reaction is improved, and the gas passing through the catalyst part 900 is also smoothly discharged toward the discharge part 700. Is formed.

In detail, the catalyst unit 900 includes a frame 910 and catalyst units 920, and each of the catalyst units 920 includes a catalyst plate 940 and a guide 960.

Each of the catalyst units 920 may be coupled to be stacked on top of each other so that the space inside the frame 910 is connected to the inlet space 10 adjacent to the diffusion part 500 and the outlet space 20 adjacent to the discharge part 700. Compartment.

The catalyst plate 940 is coupled to the frame 910 in a state spaced apart from each other in the discharge portion 700 and the inside of the adjacent frame 910 by a predetermined interval from each other, each of the guides 960 is a catalyst plate ( Disposed between each of the 940.

The catalyst plate 940 and the guide 960 are alternately formed from the top to the bottom of the guide plate 960 and the ends of each of the guide plates 960 are coupled to each of the catalyst plates 940 located in the upper and lower portions thereof, thus forming a zigzag shape. The inner space of the frame 910 is separated into the inflow space 10 and the discharge space 20 by combining with the frame 910.

In detail, one end of the guide 960 adjacent to the diffusion part 500 extends by a predetermined distance toward the catalyst plate 940 in a state in which the one end of the guide 960 is spaced apart toward the top of the one end of the catalyst plate 940. The central portion is bent toward the discharge portion 700 and extends toward the discharge portion 700 in a state parallel to the catalyst plate 940, and the other end is bent and extended toward the other end of the catalyst plate 940 inclinedly. And the other end of 940.

The other end of the guide 960 is coupled to the other end of the catalyst plate 940 to form an inlet space 10 between the guide 960 and the catalyst plate 940, and between the guide 960 and the discharge part 700. The discharge space 20 is formed.

The length of the center portion of the guide 960 is formed to be relatively longer than the length of one end and the other end of the guide 960 so that the space formed in the upper and lower portions of the center portion of the guide 960 extends from one end of the catalyst plate 940 to the other end. It is formed into a cuboid shape.

Each of the catalyst units 920 is stacked and coupled to the top and bottom in such a manner that one end of the guide 960 is coupled to one end of the catalyst plate 940 corresponding to the catalyst unit 920 positioned at the top thereof.

The guide 960 corresponding to the catalyst unit 920 positioned on the upper portion of the catalyst portion 900 is coupled to the upper portion of the frame 910 and corresponds to the catalyst unit 920 positioned on the lower portion of the catalyst portion 900. The catalyst plate 940 has a separate guide 960 is added and coupled to the lower portion of the frame 910 so that the inner space of the frame 910 with the catalytic unit 920 between the inlet space 10 and the discharge space Separate with 20.

Through the shape of the guide 960, the space between the guide 960 and the catalyst plate 940 extends so that the size of the space is uniform from one end to the other end of the catalyst plate 940 to move toward the discharge portion 700 of the gas. This has a smooth advantage.

In addition, the space formed between the catalyst units 920 is also formed to extend and maintain a space of a uniform size from one end to the other end of the catalyst plate 940, so that the gas smoothly moves to the discharge unit 700 There is an advantage.

Therefore, the gas flowing into the inlet space 10 can be easily introduced to the other end of the catalyst plate 940 between the catalyst plate 940 and the guide 960, so that the reaction between the gas and the catalyst plate 940 is smooth. There is this.

In addition, the gas discharged into the discharge space 20 located at the lower side after reacting with the catalyst plate 940 has the advantage of moving smoothly along the central portion of the guide 960 coupled to the discharge portion 700.

Meanwhile, the guide 962 illustrated in FIG. 9 may be formed in a shape having a curved concave upward, and may be used by being coupled to each of the catalyst units 920 instead of the guide 960.

When the guide 962 is used in combination with the catalyst unit 920, gas may be introduced into the space between the guide 962 and the catalyst plate 940 in a short time, and the space of the inflow space 10 itself increases. When a large amount of gas is irregularly introduced and stagnated into the selective catalytic reduction apparatus 140, there is an advantage of gradually discharging the gas to the discharge unit 700.

Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the embodiments described in the specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention and represent all of the technical idea of the present invention. It is to be understood that there may be various equivalents and variations in place of them at the time of the present application. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and their All changes or modifications derived from an equivalent concept should be construed as being included in the scope of the present invention.

100, 120, 140: selective catalytic reduction apparatus 200: inlet
300: mixing section 400: distribution section
500: diffusion portion 600: catalyst portion
700: discharge part 800: lifting part

Claims (8)

An inlet formed in the form of a duct extending from one end to the other end and including an inclined plate disposed to be spaced apart from each other in the upper and lower parts of the inner space;
A mixing part having one end formed in a duct shape coupled to the other end of the inlet part;
One end is coupled to the other end of the mixing portion, the other end is bent and extended toward one side and the inner portion is formed to be partitioned into a plurality of spaces;
One end is coupled to the other end of the distribution portion, the diffusion portion is formed to extend and extend toward the other end; And
One end is coupled to the other end of the diffusion portion and the other end is coupled to the outlet, the inner portion of the catalyst unit including a catalyst unit formed to be adjacent to the other end;
The catalytic unit is coupled to each other is bent in a zigzag form toward one end and the other end of the catalytic portion and extending toward the lower and is coupled to the catalytic portion is formed to separate the internal space of the catalytic portion is characterized in that the selective catalytic reduction device.
The method of claim 1, wherein each of the catalyst units,
A catalyst plate having one end disposed toward the distribution portion and the other end extending toward the discharge port; And
One end is disposed so as to be spaced apart from the catalyst plate on one end of the catalyst plate, the other end is extended to be inclined toward the other end of the catalyst plate and coupled to the other end of the catalyst plate; selective catalytic reduction comprising a Device.
The method of claim 2, wherein the catalytic unit,
Selective catalytic reduction device, characterized in that the one end of the guide is combined with one end of the catalyst plate of any one of the catalyst units located on the top and stacked.
The method of claim 1, wherein the mixing unit,
Reducing agent inlet is formed to open and close a part of the outside; And
And a nozzle disposed in the inner space of the mixing unit through the reducing agent inlet to inject the reducing agent.
The method of claim 4, wherein the mixing unit,
A guide unit having one end coupled to an inner side of the mixing unit and the other end extending toward a center of the distribution unit to form a curved surface concave toward the inside of the mixing unit; And
A separator plate having one end coupled to a lower end of the guide unit, the other end extending toward an upper portion of the guide unit, coupled to an upper end of the guide unit, and having inclined surfaces extending toward both sides of the distribution unit on both sides; Selective catalytic reduction device further comprising.
The method of claim 4, wherein the distribution unit,
Selective catalytic reduction device, characterized in that each one end is disposed in a state spaced apart from each other at one end of the distribution portion, the other end includes curved guide plates extending to form a curved surface parallel to each other toward one end of the diffusion portion .
The method of claim 1, wherein the diffusion unit,
Comprising a plurality of diffusion plates formed to extend inclined toward the upper end from the one end of the diffusion in the inner space,
Selective catalytic reduction device, characterized in that the inclined angle increases as the diffusion plate is disposed on the top.
The method of claim 2,
Selective catalytic reduction device further comprises a lifting unit for moving one end of the catalyst plate toward the upper or lower in accordance with the movement speed of the gas.

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