KR20220089229A - Catalyst Module for SCR System and SCR Chamber with Built-in Catalyst Module - Google Patents

Abstract

The present invention relates to a catalyst module of an SCR denitration system for denitration of exhaust gas and an SCR chamber having a built-in catalyst module. In particular, the height of the SCR chamber is reduced to increase space utilization, and to facilitate maintenance and management of the catalyst module. will be.
The present invention for achieving the above object is a catalyst module of an SCR denitration system mounted inside a chamber for denitration of exhaust gas generated from an engine, so that the exhaust gas introduced into the chamber passes from one side to the other. A two-stage SCR catalyst having a catalyst module of a single-stage SCR catalyst mounted inside the It is technically characterized by including a catalyst module, and is a chamber of an SCR denitration system for denitration of exhaust gas generated from an engine. A catalyst module of a single-stage SCR catalyst positioned in correspondence with the support lattice holes in the support so that the support provided with grid holes flows from the bottom to the top, and the catalyst module of the first-stage SCR catalyst The technical feature is to include a catalyst module of a two-stage SCR catalyst mounted on the upper portion of the SCR catalyst and having a lower end having a structure matching the upper end of the catalyst module of the first-stage SCR catalyst.

Description

Catalyst Module for SCR System and SCR Chamber with Built-in Catalyst Module

The present invention relates to a catalyst module of an SCR denitration system for denitration of exhaust gas and an SCR chamber having a built-in catalyst module. In particular, the height of the SCR chamber is reduced to increase space utilization, and to facilitate maintenance and management of the catalyst module. will be.

The exhaust gas emitted through the combustion of fossil fuels in the engine to obtain heat and power inevitably contains nitrogen oxides (NOx), which have been found to be the causative substances of photo smog, acid rain, and respiratory diseases. is being taken seriously. Therefore, recently, these nitrogen oxide (NOx) component emission regulations are being strengthened, and in response to this, nitrogen oxide (NOx) removal technology from various exhaust gases is utilized. Reduction (selective reduction catalyst method) technology is being applied in various ways.

This SCR denitration system injects a reducing agent, that is, urea water, used to denitrate nitrogen oxides (NOx) in the exhaust gas discharged from the engine, into the exhaust gas through the injection nozzle to generate ammonia by the heat of the exhaust gas, and the exhaust gas and ammonia The mixed gas mixed with the SCR catalyst is introduced into the chamber containing the SCR catalyst, and while passing through the SCR catalyst located in the chamber, the nitrogen oxides (NOx) contained in the exhaust gas are converted into harmless substances such as nitrogen (N2) and water (H2O). It adopts a structure to be discharged.

As shown in FIGS. 1 and 2, the chamber used in the conventional SCR denitration system, that is, the chamber containing the SCR catalyst, can be equipped with each SCR catalyst 20H, 20L inside the chamber 10. After forming the structure, the SCR catalysts 20H and 20L are installed in the chamber 10 in such a way that an operator mounts each of the SCR catalysts 20H and 20L into the chamber 10 one by one.

Therefore, in the case of the conventional chamber 10 having the structure as shown in FIG. 2 , in order to form the SCR catalysts 20H and 20L in two stages in the chamber 10 as shown in FIG. 2 , the SCR catalyst 20H , 20L) is installed on the upper part of each stage where the upper body of the operator holding the SCR catalyst (20H, 20L) can enter or the Since the space (refer to 'A' in FIG. 2), that is, the working space and the decomposition space, must be secured, a lot of space is required inside the chamber 10 accordingly, so that the overall volume of the chamber 10 increases and accordingly, the chamber The total length of (10) is bound to become longer.

However, in the case of an SCR denitrification system installed on a ship, it is difficult to always secure sufficient space inside the ship due to the special nature of the ship. Because it is subject to many restrictions, problems arise in which it is difficult to install, dismantle, and maintain.

In addition, as shown in FIGS. 1 and 2 , in arranging the upper SCR catalyst 20H and the lower SCR catalyst 20L, as a space is formed for the operator to maintain and manage, a maintenance window installed for the operator to enter (30) It must also be installed separately, and in order for the operator to maintain and manage the SCR catalysts (20H, 20L) through the maintenance window 30, although not shown in the drawing, a handrail on which the operator can stand for each work window is SCR There is a disadvantage that the catalyst (20H, 20L) must be formed in two layers, upper and lower, around the periphery. Accordingly, there is a disadvantage that not only the space utilization is lowered, but also the loss due to manufacturing is large.

On the other hand, the SCR catalyst of each stage has a structure in which a plurality of catalyst modules 40 are planarly arranged as shown in FIG. 3 , and the catalyst module ( 40) is settled. The support 11 has lattice holes communicating with the seated catalyst module 40, so that the exhaust gas flowing into the lower part of the support 11 passes through the support 11 and then passes through the seated catalyst module 40. .

Laid-open Patent Publication No. 10-2016-0125113 (published on October 31, 2016)

The present invention was invented to solve the problems of the prior art as described above, and the catalyst module and catalyst of the SCR denitration system configured to lower the height of the chamber and to facilitate the alignment of the catalyst module by stacking the SCR catalyst in two single layers. An object of the present invention is to provide an SCR chamber with a built-in module.

The present invention for achieving the above object is a catalyst module of an SCR denitration system mounted inside a chamber for denitration of exhaust gas generated from an engine, so that the exhaust gas introduced into the chamber passes from one side to the other. A two-stage SCR catalyst having a catalyst module of a single-stage SCR catalyst mounted inside the It is technically characterized to include a catalyst module.

In addition, according to a preferred embodiment of the present invention, the catalyst module includes a catalyst, a sidewall surrounding the sidewall of the catalyst, and a bending part at which the upper and lower ends of the sidewall are bent inward to prevent separation of the catalyst located therein It includes a case, an upper leg formed on the upper edge of the case, and a lower leg formed on the lower edge of the case.

In addition, according to a preferred embodiment of the present invention, the upper leg provided in the catalyst module of the first-stage SCR catalyst and the lower leg provided in the catalyst module of the second-stage SCR catalyst have a structure in which the upper leg is inserted into the lower leg to face each other Alternatively, the lower leg is inserted into the upper leg to match the structure.

The present invention for achieving the above object is a chamber of an SCR denitration system for denitration of exhaust gas generated from an engine. A single-stage SCR catalyst catalyst module positioned in correspondence with the grid holes of the support so that the support provided with grid holes flows from the bottom to the top, and the catalyst module of the first-stage SCR catalyst and a catalyst module of a two-stage SCR catalyst mounted on the upper part of the SCR catalyst and having a lower end having a structure matching the upper end of the catalyst module of the first-stage SCR catalyst.

In addition, according to a preferred embodiment of the present invention, the catalyst module includes a catalyst, a sidewall surrounding the sidewall of the catalyst, and a bending part at which the upper and lower ends of the sidewall are bent inward to prevent separation of the catalyst located therein It includes a case, an upper leg formed on the upper edge of the case, and a lower leg formed on the lower edge of the case.

In addition, according to a preferred embodiment of the present invention, the upper leg provided in the catalyst module of the first-stage SCR catalyst and the lower leg provided in the catalyst module of the second-stage SCR catalyst have a structure in which the upper leg is inserted inside the lower leg to match Alternatively, the lower leg is inserted into the upper leg to match the structure.

Further, according to a preferred embodiment of the present invention, the lower leg of the catalyst module of the single-stage SCR catalyst is inserted into the lattice hole of the support to match.

In addition, according to a preferred embodiment of the present invention, the pressure plate is located between the upper leg of the catalyst module of the two-stage SCR catalyst and the upper leg of the catalyst module of the other two-stage SCR catalyst located in contact with it to press the case of both catalyst modules. further includes

As described above, the catalyst module of the SCR denitration system and the SCR chamber in which the catalyst module is embedded according to the present invention are a catalyst module of a single-stage SCR catalyst mounted inside the chamber and a catalyst module of a two-stage SCR catalyst seated on the upper surface of the chamber. There is an advantage that space utilization can be increased by lowering the height of the chamber as it has a mutually matching structure.

In addition, as the maintenance window is formed to correspond to the first-stage SCR catalyst, the second-stage SCR catalyst, and the work space formed on the upper part of the two-stage SCR catalyst, it is possible to maintain and manage the first-stage SCR catalyst and the second-stage SCR catalyst at once with one maintenance window. can Therefore, in the prior art, the maintenance window and the monitoring window are formed in two stages, and the handrail that the operator can step on must be formed in two lines. And, there is an advantage that the handrail that the operator can step on can also be formed in one line.

1 is a conceptual diagram showing a chamber of an SCR denitrification system according to the prior art;
Figure 2 is a conceptual diagram showing a state of maintaining and managing the SCR catalyst of the chamber shown in Figure 1,
3 is a perspective view illustrating a bottom surface of the catalyst module shown in FIG. 1 .
Figure 4a is a perspective view of the catalyst module of the SCR denitration system according to the first embodiment of the present invention,
Figure 4b is a bottom perspective view of the catalyst module shown in Figure 4a,
5 is a cross-sectional view AA′ of the catalyst module shown in FIG. 4A;
6 is a cross-sectional view illustrating a state in which the catalyst modules shown in FIG. 5 are stacked in a single-layer, two-stage structure in a chamber.
7 is a cross-sectional view of a catalyst module of an SCR denitration system according to a second embodiment of the present invention;
8 is a cross-sectional view illustrating a structure in which the catalyst module shown in FIG. 7 is fixed between a support and a pressure plate.

Hereinafter, a preferred embodiment of the catalyst module of the SCR denitration system and the SCR chamber in which the catalyst module is built in accordance with the present invention will be described in detail with reference to the accompanying drawings.

[First embodiment]

In the drawings, FIG. 4A is a perspective view of the catalyst module of the SCR denitration system according to the first embodiment of the present invention, FIG. 4B is a bottom perspective view of the catalyst module shown in FIG. 4A, and FIG. 5 is the catalyst module shown in FIG. 4A. , and FIG. 6 is a cross-sectional view showing a state in which the catalyst modules shown in FIG. 5 are stacked in a single-layer, two-stage structure in a chamber.

As shown in Figures 4a to 5, the catalyst module 110 located inside the chamber (101 in Figure 6) of the SCR denitration system has a cuboidal catalyst 111 located inside, and the periphery of the catalyst 111 is a case. (113) wraps around. The case 113 includes a sidewall 113S surrounding the four sides of the catalyst 111 , and bent portions 113A having upper and lower ends of the sidewall 113 bent inward. As described above, as the bent portions 113A are formed in the upper and lower ends of the case 113 , the catalyst 111 located inside the case 113 does not come out of the case 113 .

And at the top and bottom of the case 113, the legs (115H, 115L) of a rectangular structure are formed, respectively.

Here, the upper leg 115H formed at the upper end of the case 113 is wider than the lower leg 115L formed at the lower end of the case 113 . Specifically, as shown in FIG. 5 , the gap L1 between the inner surfaces of the upper legs 115H is equal to or wider than the gap L2 between the outer surfaces of the lower legs 115L.

The upper leg 115H and the lower leg 115L of the case 113 are formed in the same structure in both the catalyst modules constituting the first-stage SCR catalyst 121 and the two-stage SCR catalyst 122 to be described below.

On the other hand, as shown in FIG. 6 , two stages of SCR catalysts 121 and 122 are arranged in a single layer inside the chamber 101 of the SCR denitration system, and the SCR catalysts 121 and 122 are the single-stage SCR catalysts 121 . ) and the two-stage SCR catalyst 122 . Therefore, the SCR catalysts 121 and 122 are arranged in a single-layer, two-stage structure, and the exhaust gas rising from the bottom passes through the first-stage SCR catalyst 121 and then flows into the two-stage SCR catalyst 122, and the two-stage SCR catalyst It flows upward through 122 and is exhausted. Meanwhile, one maintenance window 140 corresponding to the first-stage SCR catalyst 121 and the second-stage SCR catalyst 122 is formed in the chamber 100 , and a monitoring window 141 is formed in the maintenance window 140 .

Hereinafter, the catalyst module of the SCR denitration system according to the present invention will be described in detail.

As shown in FIG. 6 , a support 131 is fixed in the transverse direction of the chamber 100 in the middle of the height inside the chamber 100. The support 131 is not shown in the drawing, but as a grid plate structure, The single-stage SCR catalyst 121 is mounted on the upper surface of the support 131 corresponding to the hole, respectively. Here, the grid hole 132 of the support 131 is a rectangular hole having an area corresponding to the outer surface of the lower leg 115L to match the lower leg 115L of the catalyst module 110 .

And the two-stage SCR catalyst 122 is mounted on the upper surface of the one-stage SCR catalyst 121 mounted on the upper surface of the support 131 .

Specifically, when the catalyst module 110 constituting the single-stage SCR catalyst 121 is seated in the lattice hole 132 of the support 131 , the lower leg 115L of the catalyst module 110 is the supporter 131 . By matching the lattice hole 132 , the catalyst module 110 of the single-stage SCR catalyst 121 is not only movable upward, but is fixed on the plane of the support 131 .

In this state, the catalyst module 110 of the second-stage SCR catalyst 122 is seated on the upper surface of the catalyst module 110 of the first-stage SCR catalyst 121 .

The lower leg 115L of the catalyst module 110 of the two-stage SCR catalyst 122 is inserted inside the upper leg 115H of the catalyst module 110 of the first-stage SCR catalyst 121 . At this time, it is preferable that the gap L1 between the inner surfaces of the upper legs 115H is formed to be larger than the gap L2 of the outer surfaces of the lower legs 115L by less than 1 mm.

If the distance L1 between the inner surfaces of the upper leg 115H is the same as the gap L2 between the outer surfaces of the lower leg 115L, the lower leg 115L is inserted into the upper leg 115H to match. There is difficulty in workability, and when it is 1 mm or more, the flow of the catalyst module 110 of the two-stage SCR catalyst 122 mounted on the catalyst module 110 of the first-stage SCR catalyst 121 occurs. This is because the alignment of the plurality of catalyst modules 110 aligned on a plane may be misaligned.

Hereinafter, the relationship between the installation and replacement of the catalyst module of the SCR denitration system configured as described above will be described.

In order to mount the SCR catalysts 121 and 122 in the chamber 100 , the maintenance window 140 is opened. The catalyst module 110 of the single-stage SCR catalyst 121 is installed in each lattice hole 132 of the support 131 through the space S formed on the upper portion of the support 131 exposed as the maintenance window 140 is opened. Located.

At this time, as described above, the lower leg 115L of the catalyst module 110 of the single-stage SCR catalyst 121 is inserted into the lattice hole 132 of the support 131 to match the plurality of catalyst modules 110. All are mounted on the support (131).

And when all of the catalyst modules 110 of the first-stage SCR catalyst 121 are aligned with the lattice holes 132 of the support 131 and aligned, then the catalyst module 110 of the two-stage SCR catalyst 122 is installed in the first stage. The SCR catalyst 121 is seated on the top of the catalyst module 110 . At this time, as described above, the lower leg 115L of the catalyst module 110 of the second-stage SCR catalyst 122 is aligned with the inside of the upper leg 115H of the catalyst module 110 of the first-stage SCR catalyst 121. do.

In this case, the catalyst module 110 of the single-stage SCR catalyst 121 is fixed to the lattice hole 132 of the support 131 , and the two-stage SCR is placed on the upper portion of the catalyst module 110 of the single-stage SCR catalyst 121 . Since the catalyst module 110 of the catalyst 122 is fixed, it is possible to prevent the alignment of the catalyst module 110 from being disturbed even by the flow of a ship or an external impact.

In the catalyst module 110 configured as described above, in the first embodiment, the upper leg 115H and the lower leg 115L are shown to extend along the edges of the upper and lower surfaces of the case 113, but have a rectangular structure. Even if holes are formed in the upper leg (115H) and the lower leg (115L) so that the exhaust gas can move to the catalyst module located next to it through the upper leg (115H) and the lower leg (115L) or formed only at the vertex of the present invention Objectives and effects can be realized.

[Second embodiment]

In the catalyst module in the first embodiment described above, the gap L1 between the inner surfaces facing the upper leg 115H is the same as or wider than the gap L2 of the outer surface of the lower leg 115L. , In the second embodiment described below, on the contrary, the gap L3 between the facing outer surfaces of the upper leg 115H is equal to or narrower than the gap L4 of the inner surface of the lower leg 115L. Accordingly, there is a difference in coupling between the support 131 and the catalyst module 110 .

7 is a cross-sectional view of a catalyst module of an SCR denitration system according to a second embodiment of the present invention, and FIG. 8 is a cross-sectional view showing a structure in which the catalyst module shown in FIG. 7 is fixed between a support and a pressure plate.

7 and 8 , an upper leg 115H is formed on the upper surface of the catalyst module 110 mounted on the support 131 , and a lower leg 115L is formed on the lower surface of the catalyst module 110 . is formed

Here, the gap L3 between the opposite outer surfaces of the upper leg 115H is configured to be equal to or narrower than the gap L4 of the inner surface of the lower leg 115L, and the catalyst of the one-stage SCR catalyst 121 The module 110 is seated on the upper surface of the support 131 in correspondence with the lattice hole 132 of the support 131 . At this time, the lower leg 115L of the catalyst module 110 is not aligned with the lattice hole 132 , but is positioned to be seated on the outer periphery of the lattice hole 132 .

Meanwhile, in this state, the catalyst module 110 of the second-stage SCR catalyst 122 is seated on the upper surface of the catalyst module 110 of the first-stage SCR catalyst 121, and the catalyst module 110 of the first-stage SCR catalyst 121 ), since the width of the upper leg 115H is narrower than the width of the lower leg 115L of the catalyst module 110 of the two-stage SCR catalyst 122, the lower leg 115L is the upper leg as shown in FIG. (115H) wrapped around and matched. Even at this time, it is preferable that the gap L4 between the inner surfaces of the lower legs 115L is formed to be larger than the gap L3 of the outer surfaces of the upper legs 115H by less than 1 mm.

In this way, in a state in which the catalyst modules 110 of the two-stage SCR catalyst 122 are seated and aligned on the upper portion of the catalyst module 110 of the first-stage SCR catalyst 121, the pressure plate 135 is mounted on the two-stage SCR catalyst 122 ) is seated on the upper surface of the catalyst module 110 and pressurizes the catalyst module 110 of the matched two-stage SCR catalyst 122 .

The pressure plate 135 has a structure in which a lattice hole is formed, and is positioned between the upper legs 115H of the catalyst module 110 of the two-stage SCR catalyst 122) arranged on both sides, and the bent portion 113A of the catalyst module 110. By pressing the catalytic module 110 stacked in the first and second stages, the alignment is prevented from being misaligned by the shaking of the ship or an external shock occurring during operation.

In addition, in the embodiment described above, the legs (115H, 115L) of a rectangular structure are formed at the top and bottom of the case 113, and a rectangular grid hole 132 is formed in the support 131 to match. , the rectangular structure is only an example for explaining an embodiment of the present invention, and it is not limited to a rectangular shape and may be formed in a polygonal structure including a square.

In addition, although the above-described embodiment describes that the catalyst modules 110 are stacked in two stages inside the SCR chamber, the catalyst module according to this embodiment is not limited to only the inside of the SCR chamber, and the outside of the SCR chamber, that is, the catalyst module is stored. It can also be applied when stacking catalyst modules in multiple stages.

In addition, although the above-described embodiment describes an example of stacking the catalyst module in one stage and two stages, it may be applicable to a method of stacking the catalyst module in multiple stages with two or more stages. can be fixed

101: chamber
110: catalyst module
111: catalyst
113: case
115H, 115L : Leg
121, 122: SCR catalyst
131: support
132: grid hole
135: press plate
140: maintenance window
141: watch window

Claims (8)

As a catalyst module of an SCR denitration system mounted inside a chamber for denitration of exhaust gas generated from an engine,
A catalyst module 110 of a single-stage SCR catalyst 121 mounted inside the chamber 101 so that the exhaust gas introduced into the chamber 101 passes from one side to the other;
A two-stage SCR catalyst 122 mounted on the upper portion of the catalyst module 110 of the first-stage SCR catalyst 121 and having a lower end of the structure facing the upper end of the catalyst module 110 of the first-stage SCR catalyst 121 ) of the catalyst module of the SCR denitration system, characterized in that it comprises a catalyst module (110).
According to claim 1,
The catalyst module 110 includes a catalyst 111, a sidewall 113S surrounding the side surface of the catalyst 111, and a catalyst 111 with upper and lower ends of the sidewall 113S bent inward and positioned inside. It includes a case 113 having a bent portion 113A for preventing separation, an upper leg 115H formed on the upper edge of the case 113, and a lower leg 115L formed on the lower edge of the case 113 . Catalyst module of the SCR denitration system, characterized in that.
3. The method of claim 2,
The upper leg 115H provided in the catalyst module of the first-stage SCR catalyst 121 and the lower leg 115L provided in the catalyst module 110 of the second-stage SCR catalyst 122 are the upper leg 115H. The catalyst module of the SCR denitration system, characterized in that it is inserted into the inside of the leg (115L) to match, or the lower leg (115L) is inserted into and matched to the inside of the upper leg (115H).
As a chamber of the SCR denitration system for denitration of exhaust gas generated from an engine,
In the case where the exhaust gas introduced into the lower part of the chamber 101 flows upward, it is located in the middle part of the height of the chamber 101 in the transverse direction and the support 131 with grid holes 132 formed therein;
The catalyst module 110 of the single-stage SCR catalyst 121 positioned to correspond to the lattice holes 132 of the support 131 so that the exhaust gas introduced into the chamber 101 flows from the bottom to the top;
A two-stage SCR catalyst 122 mounted on the upper portion of the catalyst module 110 of the first-stage SCR catalyst 121 and having a lower end of the structure facing the upper end of the catalyst module 110 of the first-stage SCR catalyst 121 ) of the SCR denitration system chamber, characterized in that it comprises a catalyst module (110).
5. The method of claim 4,
The catalyst module 110 includes a catalyst 111, a sidewall 113S surrounding the side surface of the catalyst 111, and a catalyst 111 with upper and lower ends of the sidewall 113S bent inward and positioned inside. It includes a case 113 having a bent portion 113A for preventing separation, an upper leg 115H formed on the upper edge of the case 113, and a lower leg 115L formed on the lower edge of the case 113 . The chamber of the SCR denitrification system, characterized in that.
6. The method of claim 5,
The upper leg 115H provided in the catalyst module 110 of the first-stage SCR catalyst 121 and the lower leg 115L provided in the catalyst module 110 of the second-stage SCR catalyst 122 have the upper leg 115H The chamber of the SCR denitrification system, characterized in that the structure is inserted into the lower leg (115L) to match or the lower leg (115L) is inserted into the inner side of the upper leg (115H) to match.
6. The method of claim 5,
The chamber of the SCR denitration system, characterized in that the lower leg (115L) of the catalyst module (110) of the single-stage SCR catalyst (121) is inserted into the inside of the lattice hole (132) of the support (131) to match.
6. The method of claim 5,
It is located between the upper leg 115H of the catalyst module 110 of the two-stage SCR catalyst 122 and the upper leg 115H of the catalyst module 110 of the other two-stage SCR catalyst 122 located in contact with the catalyst on both sides. The chamber of the SCR denitrification system, characterized in that it further comprises a pressure plate 135 for pressing the case 113 of the module.

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