KR20210105658A - SCR apparatus with Improved Reaction Efficiency - Google Patents

Abstract

The present invention relates to an SCR apparatus capable of expanding a contact area of a catalyst and gas and improving the flow of the gas in a limited space. According to one embodiment of the present invention, the SCR apparatus includes: an introduction part formed in a duct shape extended from one end to the other end, and including inclined plates placed to be spaced apart from each other as upper and lower parts in an internal space; a mixing part having one end combined with the other end of the introduction part and having both ends open to the outside; a distribution part having one end combined with the other end of the mixing part, having the other end bent and extended toward one side, and having an inside divided into a plurality of spaces; a spreading part having one end combined with the other end of the distribution part, and formed to be extended while being expanded toward the other end; and a catalyst part having one end combined with the other end of the spreading part, having the other end combined with an outlet, and including catalyst units formed to be adjacent to the other end in an internal space. The catalyst units are combined with each other to be bent in a zigzag form toward one end and the other end of the catalyst part, extended downward, combined with the catalyst part, and formed to separate the internal space of the catalyst part to bring a catalyst of the catalyst part into contact with a relatively large amount of gas, and, as a result, the SCR apparatus can be operated with high efficiency in a confined space.

Description

SCR apparatus with improved reaction efficiency

The present invention relates to an SCR device, and to an SCR device with improved efficiency of removing nitrogen oxides through a catalyst.

Recently, as part of efforts to reduce the emission of air pollutants that cause fine dust in Korea, the relevant laws and regulations have been amended and the enforcement rules have been revised and supplemented, thereby strengthening pollution control.

As a post-treatment facility for treating nitrogen oxide, a representative air pollutant, a selective catalytic reduction (SCR) system and a selective non-catalytic reduction (SNCR) system are typically used.

When the SCR device is installed in an 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 a limited space is relatively low, resulting in poor nitrogen oxide removal efficiency.

In this regard, Korean Patent No. 10-1561260 discloses an SCR reactor for installing a minimum area, and Korean Patent Publication No. 10-0983635 discloses a channeled flue of a catalytic reduction reactor.

However, conventional 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.

Registered Patent No. 10-1561260, SCR Reactor for Minimum Area Installation, (Registration Date: October 12, 2015) Registered Patent No. 10-0983635, Channeled Year of Selective Catalytic Reduction Reactor for Improved Ammonia Injection and Effective Nitrogen Oxide Control (Registration Date: September 15, 2010)

The present invention provides an SCR device that expands the contact area between a catalyst and a gas in a limited space and improves the flow of gas.

As an embodiment, the SCR device is formed in the form of a duct extending from one end to the other end, and an inlet including inclined plates disposed to be spaced apart from each other in the upper and lower portions in the inner space, one end coupled to the other end of the inlet and both ends to the outside An open mixing unit, one end is coupled to the other end of the mixing unit, the other end is bent and extended toward one side and the inside is formed to be partitioned into a plurality of spaces, one end is coupled to the other end of the distribution unit, the other end is A diffusion unit formed to extend and extend toward the diffusion unit, and one end is coupled to the other end of the diffusion unit, the other end is coupled to the outlet, and a catalyst unit including catalyst units formed adjacent to the other end in the inner space, wherein the catalyst units are each other The catalyst part is bent in a zigzag shape toward one end and the other end by combining, extending downward, and coupled to the catalyst part to separate the internal space of the catalyst part.

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

In addition, the catalyst units may be stacked with one end of the guide and one end of the catalyst plate of any one of the catalyst units positioned on the guide.

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

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

In addition, each of the distributing units may include curved guide plates at one end of the distributing unit spaced apart from each other on both sides, the other end forming a curved surface parallel to each other toward one end of the diffusion unit, and extending.

In addition, the diffusion portion includes a plurality of diffusion plates that are formed to extend obliquely from one end of the diffusion portion toward the upper portion of the other end in the inner space, and the inclination angle of the diffusion plates may increase as the diffusion plates are disposed on the upper portion.

The SCR device according to the present invention has an excellent effect of removing nitrogen oxides in a limited space by uniformly spreading the gas toward the catalyst plates after mixing the incoming gas.

In addition, the SCR device mixes the incoming gas and slows the gas by adjusting the movement path, thereby improving the efficiency of reacting to the catalyst plate manufactured so that the uniformly diffused gas has a large surface area.

In addition, in the SCR device, guides for guiding the movement of gas between the catalyst plates are formed to be inclined, so that the contact area between the gas and the catalyst plate is increased, and the effect of removing nitrogen oxides is improved.

1 is a view showing a flow analysis result of a conventional SCR device.
2 is a perspective view of an SCR device according to an embodiment of the disclosure disclosed herein.
3 is a perspective view illustrating a part of the SCR device of FIG. 2 .
4 is a perspective view and a bottom view illustrating a guide unit and a separation plate of the SCR device of FIG. 2 .
5 is a cross-sectional view taken along line I-I' of the selective catalytic reduction device of FIG.
6 is a cross-sectional view taken along II-II' of the selective catalytic reduction device of FIG.
7 is a view showing a flow analysis result of the SCR device of FIG. 2 .
8 is a perspective view of an SCR device according to another embodiment of the present disclosure.
9 is a perspective view of an SCR device according to another embodiment of the present disclosure.

The present invention described below can apply various transformations and can have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description.

However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Also, terms such as first, second, etc. may be used to distinguish and describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

In addition, when at least two different embodiments are described in the present application, all or part of the components may be used by merging and mixing with each other even if there is no particular description within the scope not departing from the technical spirit of the present invention. .

1 shows an image showing a flow analysis result of a conventional SCR device.

As shown in FIG. 1, the conventional SCR device 1 has an inlet 2 through which gas is introduced, a catalyst unit 4 that removes nitrogen oxides from the gas, and a gas discharged from the catalyst unit 4 moves. A connecting portion 6 forming a space and an outlet 8 through which gas is discharged to the outside are formed.

In the SCR device 1, the injection part 2 and the catalyst part 4 are adjacent to each other so that the gas moves directly to the catalyst part 4, but the space other than the catalyst part 4 is relatively wide in a limited space. It is necessary to improve the nitrogen oxide removal effect through space utilization.

In the case of the catalyst part 4, it 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 used only as a space in which the nitrogen oxide-free gas moves. Therefore, it is necessary to effectively utilize the space of the connection part (6).

In addition, referring to the flow analysis result, the speed (about 14 m/s) inside the catalyst part 4 of the gas flowing in from the inlet 2 is relatively higher than the speed inside the connection part 6 (about 5 m/s). High, it can be seen that the velocity of the gas discharged through the outlet 8 (about 14 m/s) is also relatively higher than the velocity inside the connection part 6 .

Through this, the speed is relatively high in the space where the contact between the gas and the catalyst part 4 is required, and the nitrogen oxide removal efficiency is reduced, and the gas discharged from the catalyst part 4 is stagnated through the connection part 6 and then the ), it is necessary to utilize the space corresponding to the connection part 6 and to reduce the speed of the gas in the space where the contact between the gas and the catalyst part 4 is required at the same time.

2 shows a perspective view of an SCR device according to an embodiment of the subject matter disclosed herein. FIG. 3 is a perspective view showing a part of the SCR device of FIG. 2 .

As shown in FIGS. 2 and 3 , the SCR device 100 includes an inlet 200 , a mixing unit 300 , a distribution unit 400 , a diffusion unit 500 , a catalyst unit 600 and an exhaust unit ( 700).

The SCR apparatus 100 mixes and separates the gas flowing in from the inlet 200 and moves it toward the catalyst unit 600 to guide the movement of a uniform amount of gas to various locations of the catalyst unit 600, The nitrogen oxide removal effect is improved by maximally expanding the area of the catalyst unit 600 .

Specifically, the inlet 200 includes a frame 220 and a swash plate 240 .

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

The inlet 200 separates the gas flowing in from the combustion device including the boiler that discharges the gas inside the building through the plurality of inclined plates 240 into the upper and lower portions 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 is inclinedly extended toward the front upper portion and is coupled to one end of the mixing unit 300 , and a hollow through which gas can move is formed in the center.

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

Accordingly, the gas flowing into the inlet 200 is moved toward the mixing unit 300 in a state of being separated into the upper and lower portions by the swash plates 240 , and the speed decreases, and the gas inside the frame 220 moves to one side. avoid being biased.

The mixing unit 300 is formed in the form of a duct, and one end is connected to the other end of the inlet 200 so that the gas discharged from the inlet 200 flows in, and a predetermined space is provided so that the inflow gas can be mixed with each other. is formed

Specifically, the mixing unit 300 includes a frame 320 , a guide unit 340 , a separating plate 360 , a reducing agent inlet 370 and nozzles 375 .

The frame 320 is formed in the form of a duct, and a detachable or attachable cover is coupled to one side to open the inner space of the frame 320 to one side, and a reducing agent inlet 370 is formed at the upper portion for the gas to be mixed. It is possible to effectively introduce a reducing agent.

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

The nozzles 375 are disposed to be spaced apart from each other at uniform intervals in the upper and lower portions through a pipe extending downward from the inside of the frame 320 through the reducing agent inlet 370 to effectively spray the reducing agent to 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 so that one end of the distribution unit 400 and the inner space are connected.

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

Accordingly, the gases mixed with each other inside the mixing unit 300 are separated on both sides through the separation plate 360 and move toward the distribution unit 400 , and the guide unit 340 is coupled to the inside of the frame 320 . to stably support the separation plate 360 .

In addition, the separation plate 360 prevents the gas mixed in the inner space of the frame 320 from being excessively concentrated in the center of the distribution unit 400 while passing through the guide unit 340 so that the gas is distributed through the distribution unit 400 . Guide it to move uniformly 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 of the mixing unit 300 is connected to the inner space, and the other end is bent and extended toward one side so that one end of the diffusion unit 500 is connected to the inner space.

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

One end of the first curved guide plate 430 is formed in the form of a plate connecting one end and upper and lower ends of the frame 420 at a position adjacent to one side of one end of the frame 420 , and the other end is formed along the bending direction of the frame 420 . It extends to divide the inner 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 one end of the upper and lower ends of the frame 420 at a position adjacent to the other side of one end of the frame 420 , and the other end of the frame 420 is bent in the direction in which the frame 420 is bent. The space extending along the other side of the first curved guide plate 430 is divided 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 on one side, the other side and the center of the inner space of the frame 420, and the separation plate 360. The gas separated and introduced through is separated again through the first and second curved guide plates 430 and 440 and moves toward the diffusion unit 500 .

Figure 4 shows a perspective view and a bottom view showing the guide unit and the separation plate of the SCR device of Figure 2;

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 edge of the guide unit 340 is coupled to the inner surface of the frame 320 , and the other end is the mixing unit 300 . ) extending toward the center of the other end, the inner surface of the rim is formed with a curved surface concavely protruding toward one end of the mixing unit 300 inward.

The separating plate 360 has a central portion that protrudes toward one end of the mixing unit 300 , and both side surfaces extend obliquely from the central portion toward the distribution unit 400 so that both sides thereof are bent toward the distribution unit 400 .

One end of the separation plate 360 is coupled to one end of the guide unit 340 at one end of the lower end of the guide unit 340, and the other end is extended toward the upper side so that both sides of the guide unit 340 from the upper end of the guide unit 340 are on both sides. It is combined with one end of (340).

Accordingly, the gas introduced and mixed in the mixing unit 300 is separated on both sides by the inclined surfaces formed on both sides of the separation plate 360 and the curved surfaces formed on the edge of the guide unit 340, and the distribution unit 400 is separated. move towards

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

1 to 6 , the diffusion unit 500 includes a frame 520 , a first diffusion plate 540 , a second diffusion plate 542 , and a third diffusion plate 544 .

One end of the diffusion unit 500 is coupled to the other end of the distribution unit 400 so as to be connected to the inner space of the distribution unit 400 , and the upper end is extended and extended toward the other end so that one end of the catalyst unit 600 and the inner space are separated. joined to be connected.

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

The first diffusion plate 540 is formed in the lower portion of the inner space of the diffusion unit 500 , one end is coupled to the frame 520 at a position adjacent to the distribution unit 400 , and the other end is formed in the extending direction of the frame 520 . It extends obliquely toward the top along the

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

The second diffusion plate 542 is spaced apart from the upper portion of the first diffusion plate 540 , and has one end coupled to the frame 520 at a position adjacent to the distribution unit 400 , and the other end in the extending direction of the frame 520 . It extends obliquely upward at a relatively higher inclination angle than the inclination angle of the first diffusion plate 540 along the .

The inner space of the frame 520 is a space under 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 . It is divided into a space and a space formed above the second diffusion plate 542 .

The third diffusion plate 544 is spaced apart from the upper portion of the second diffusion plate 542 , and has one end coupled to the frame 520 at a position adjacent to the distribution unit 400 , and the other end in the extending direction of the frame 520 . It extends obliquely upward at a relatively higher angle than the inclination angle of the second diffusion plate 542 along the .

Accordingly, the inner space of the frame 520 is divided into four spaces through the first to third diffusion plates 540 , 542 , and 544 , and the gas introduced from one end of the diffusion unit 500 passes through the four spaces. They separate from each other and spread and move toward one side.

In addition, a uniform amount of gas flowing into the diffusion unit 500 is dispersed upward through the first to third diffusion plates 540 , 520 , and 544 , the inclination angle of which increases as the gas is disposed on the upper portion, and moves toward one side.

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 inner space is connected to each other, and the other end is extended toward one side so that one end of the discharge unit 700 and the inner space are connected to each other.

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

Catalyst units 630 are disposed adjacent to the discharge unit 700 in the inner space of the frame 620, are coupled to each other from the bottom surface of the frame 620 toward the top and are stacked and introduced from one end of the frame 620. A space in which the gas moves toward the discharge unit 700 is separated.

Catalyst units 630 are coupled to each other and the upper end of the frame 620 is reciprocally moved toward one end or the other end of the frame 620 in a state of being coupled to the upper portion of the frame 620 inside the frame 620 and extending in a zigzag form. do.

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

Each of the catalyst plates 640 is disposed to be spaced apart from each other at a predetermined distance from the lower part of the frame 620 to the upper part, and each of the guides 660 is a catalyst plate 640 between each of the catalyst plates 640 . ) and block the space in which the gas moves toward the discharge unit 700 .

Specifically, one end of each of the guides 660 is disposed to be spaced apart from the upper end of each of the catalyst plates 640 , and the other end of each of the guides 660 extends obliquely toward the lower side of the one side where the discharge part 700 is located. ) is connected to the other end of

At the lower portion of the catalyst unit 600, one end of a separate guide 660 is coupled to one end of the catalyst plate 640 located at the lower portion, and one end is extended toward the lower portion and is coupled to the lower surface of the frame 620, and is located at the upper portion. 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 unit 700 and the inflow space 10 adjacent to the diffusion unit 600 from each other. do.

The gas moving toward the discharge unit 700 along the bottom surface of each of the guides 660 comes into contact with the upper surface of each of the catalyst plates 640 to remove nitrogen oxide through a reaction, and the gas from which nitrogen oxide is removed is It moves toward the discharge part 700 past the catalyst plates 640 .

Accordingly, each of the guides 660 guides the gas uniformly dispersed in the upper and lower portions in the diffusion unit 700 to the upper surface of the catalyst plate 640 to improve the contact area between the gas and the catalyst plate 640 , and The catalytic reaction is improved.

In addition, each of the catalyst plates 640 is disposed on one side of the frame 620 adjacent to the discharge portion 700 having a relatively wide space, and effectively removes nitrogen oxides through a relatively larger surface area than the catalyst portion 4 of FIG. 1 . There are possible advantages.

On the other hand, in the case of a separate guide 660 coupled to the bottom surface of the catalyst part 600 , the gas moving toward the discharge part 700 along the bottom surface of the catalyst part 600 by replacing the catalyst plate 640 is the catalyst part. It can prevent stagnation at the bottom of (600).

The discharge unit 700 has one end coupled so that the other end of the catalyst unit 600 is connected to 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 flow analysis results of the SCR device of FIG. 2 .

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

In particular, in the process of bypassing and moving through the mixing unit 300 , the gas first decreases in speed and then diffuses and moves by the first to third diffusion plates 540 , 542 , and 544 , while the speed is significantly reduced and the reduced gas The inflow of gas into the space between the catalyst plates 640 is smooth by the speed of , so that nitrogen oxides are effectively removed.

In addition, compared to the speed (about 13901 m/s) of the gas moving in the catalyst part 4 of FIG. 1 , the speed of the gas inside the catalyst part 600 of FIG. 7 (about 51189 m/s) is relatively Since it is remarkably low, there is an advantage that the reaction of the gas flowing into the catalyst plate 640 is sufficiently continued.

8 shows a perspective view of an SCR device according to another embodiment of the subject matter disclosed herein.

Since the SCR device 120 according to this embodiment is substantially the same as the SCR device 100 of FIGS. 1 to 7 , except for the lifting unit 800 , the same reference numerals and names are used, and duplicate descriptions are omitted. .

As shown in FIG. 8, the SCR device 120 further includes a lifting unit 800, and the lifting unit 800 is a motor 820, a sliding bar 840, a spring 860, and a flow rate sensor ( 880).

The lifting unit 800 is coupled to one end of each of the catalyst plates 640 on one side of the inner side of the frame 620 to raise or lower one end of the catalyst plate 640 through a part of the lifting or lowering driving.

As the gas moves toward the discharge unit 700 through the driving of the lifting unit 800 , one end of the guides 660 is disposed relatively lower than the other end to form an inclined surface of the upper surface of the catalyst plate 640 . Since it is in primary contact with the gas, there is an advantage in that the nitrogen oxide removal effect is improved in the case of a gas moving at a relatively low speed.

In this case, both sides of the other end of each of the catalyst plates 640 are rotatably coupled to both sides of the frame 620 so that one end of the catalyst plate 640 moves upward or downward with the other end of the catalyst plate 640 as an axis. This is possible.

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

When the spring 860 is disposed on the lower surface of one end of the catalyst plate 640 and the sliding bar 840 is temporarily lowered and needs to move upward again, when the motor 820 is stopped, the sliding bar 840 is It moves elastically toward the top.

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

Therefore, the SCR device 120 has the advantage of continuously maintaining the nitrogen oxide removal effect according to the moving speed of the gas through the driving of the lifting unit 800 .

9 shows a perspective view of an SCR device according to another embodiment of the subject matter disclosed herein.

Since the SCR device 140 according to this embodiment is substantially the same as the SCR device 100 of FIGS. 1 to 7 except for the catalyst unit 900, the same reference numerals and names are used, and duplicate descriptions are omitted. .

As shown in FIG. 9 , the SCR device 140 includes a catalyst unit 900 .

The catalyst unit 900 improves the catalytic reaction through a structure in which the inflow gas can smoothly move toward the discharge unit 700 , and the gas that has passed through the catalyst unit 900 is also smoothly discharged toward the discharge unit 700 . is formed

Specifically, 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 is combined so as to be stacked on top of each other so that the inner space of the frame 910 is divided into an inlet space 10 adjacent to the diffusion unit 500 and an outlet space 20 adjacent to the discharge unit 700 . compartmentalize

The catalyst plate 940 is coupled to the frame 910 in a state in which the upper and lower portions are spaced apart from each other at a predetermined distance inside the frame 910 adjacent to the discharge unit 700, and each of the guides 960 is a catalyst plate ( 940) is disposed between each of them.

In a state in which the catalyst plate 940 and the guide 960 are alternately arranged from the top to the bottom, both ends of each of the guides 960 are combined with each of the catalyst plates 940 located at the top and bottom to form a zigzag shape as a whole. and is combined with the frame 910 to separate the inner space of the frame 910 into an inlet space 10 and an outlet space 20 .

Specifically, one end of the guide 960 adjacent to the diffusion unit 500 extends a predetermined distance toward the catalyst plate 940 in a state in which one end of the catalyst plate 940 is spaced apart toward the top, The central portion is bent toward the discharge unit 700 and extends toward the discharge unit 700 in a state parallel to the catalyst plate 940, and the other end is inclined and bent and extended toward the other end of the catalyst plate 940 to form the catalyst plate ( 940) is combined with the other end.

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 unit 700 . A discharge space 20 is formed.

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

Each of the catalyst units 920 is stacked and coupled 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 located thereon.

The guide 960 corresponding to the catalyst unit 920 located above the catalyst unit 900 is coupled to the upper portion of the frame 910 and corresponds to the catalyst unit 920 located below the catalyst unit 900 . The catalyst plate 940 has a separate guide 960 added thereto and is coupled to the lower portion of the frame 910 so that the internal space of the frame 910 is interposed between the catalyst units 920 and the inlet space 10 and the outlet space. (20) is separated.

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

In addition, since the space formed between the catalyst units 920 also extends from one end to the other end of the catalyst plate 940 while maintaining a uniform size, the gas moves smoothly to the discharge unit 700 . There are advantages.

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

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

On the other hand, the guide 962 shown in FIG. 9 is formed in a shape having a curved surface concave toward the top, and may be used by being coupled to each of the catalyst units 920 instead of the guide 960 .

When the guide 962 is coupled to the catalyst unit 920 and used, gas can 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 into the SCR device 140 and is stagnant, there is an advantage of gradually discharging the gas to the discharge unit 700 .

As described above in detail, the SCR device according to the present invention has an excellent effect of removing nitrogen oxides in a limited space by uniformly spreading the gas toward the catalyst plates after mixing the incoming gas.

In addition, the SCR device mixes the incoming gas and slows the gas by adjusting the movement path, thereby improving the efficiency of reacting to the catalyst plate manufactured so that the uniformly diffused gas has a large surface area.

In addition, in the SCR device, guides for guiding the movement of gas between the catalyst plates are formed to be inclined, so that the contact area between the gas and the catalyst plate is increased, and the effect of removing nitrogen oxides is improved.

On the other hand, the embodiments disclosed in the drawings are merely presented as specific examples to aid understanding, and are not intended to limit the scope of the present invention. It will be apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

100, 120, 140: SCR device 200: inlet
300: mixing unit 400: distribution unit
500: diffuser 600: catalyst unit
700: discharge unit 800: elevating unit

Claims (5)

an inlet portion formed in the form of a duct extending from one end to the other end, and including inclined plates arranged to be spaced apart from each other in the upper and lower portions in the inner space;
a mixing unit having one end formed in the form of a duct coupled to the other end of the inlet;
a distribution unit having one end coupled to the other end of the mixing unit, the other end being bent and extended toward one side, and configured to be partitioned into a plurality of spaces;
a diffusion unit having one end coupled to the other end of the distribution unit and extending toward the other end; and
One end is coupled to the other end of the diffusion unit, the other end is coupled to the outlet, the catalyst unit including a catalyst unit formed adjacent to the other end in the inner space;
The catalyst units are coupled to each other and are bent in a zigzag form toward one end and the other end of the catalyst unit, extend downward, and are coupled to the catalyst unit to separate the inner space of the catalyst unit,
Each of the catalyst units,
a catalyst plate having one end disposed toward the distribution unit and the other end extending toward the outlet; and
and a guide having one end disposed on one end of the catalyst plate to be spaced apart from the catalyst plate, and the other end extending obliquely toward the other end of the catalyst plate and coupled to the other end of the catalyst plate.
One end of the guide is combined with one end of the catalyst plate of any one of the catalyst units located on the upper portion and stacked with each other,
The mixing unit,
a reducing agent inlet formed to open and close a part of the outside; and
SCR apparatus including a; nozzles disposed in the inner space of the mixing unit through the reducing agent inlet for spraying the reducing agent. According to claim 1,
The mixing unit,
a guide unit having one end coupled to the inner surface of the mixing unit, and the other end extending toward the center of the distribution unit to form a concave curved surface toward the inside of the mixing unit; and
One end is coupled to one end of the lower portion of the guide unit, the other end is extended toward the upper portion of the guide unit is coupled to the upper one end of the guide unit, the separation plate is formed with inclined surfaces extending toward both sides of the distribution unit on both sides; SCR device further comprising a. According to claim 1,
The distribution unit,
One end of each of the distributing unit is disposed in a state of being spaced apart from each other on both sides, the other end of the SCR device, characterized in that it comprises curved guide plates extending to form a curved surface parallel to each other toward one end of the diffusion unit. According to claim 1,
The diffusion unit,
A plurality of diffusion plates formed to extend obliquely from one end of the diffusion unit toward the upper portion of the other end in the internal space,
The SCR device, characterized in that the more the diffusion plates are disposed on the inclination angle increases. According to claim 1,
The SCR apparatus further comprising a lifting unit for moving one end of the catalyst plate upward or downward according to the moving speed of the gas.

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