KR101956680B1 - Selective catalytic reduction system - Google Patents

Abstract

The present invention relates to an SCR system, and more particularly, to a system and method for controlling exhaust gas emission by a catalyst member when the use of an SCR system is unnecessary, such as during a period other than a clean area, The back pressure of the exhaust gas can be maintained, the restriction of the system operation can be eliminated, the use of the catalyst member can be easily controlled without disassembling the catalyst member, and the unused catalyst member can be easily stored in the reactor SCR system.
The SCR system according to the present invention comprises: a reactor connected to an exhaust line for passing exhaust gas therethrough; A catalyst member located inside the reactor; And a catalyst housing mounted with the catalyst member and foldable in the reactor to vary the position or posture of the catalyst member so that the exhaust gas passes through or bypasses the catalyst member.

Description

SCR System {SELECTIVE CATALYTIC REDUCTION SYSTEM}

The present invention relates to an SCR system, and more particularly, to an SCR system configured to easily control the use of a catalyst member without disassembling the catalyst member.

Generally, the ship discharges the exhaust gas generated during the combustion of the fuel in the engine at the time of the operation, and the exhaust gas contains various harmful substances. Since the harmful substances of the exhaust gas cause environmental pollution and are harmful to human body, the amount to be discharged by various environmental regulations should be reduced to an appropriate level. For example, for the NOx among the harmful substances, IMO The International Maritime Organization (IEA) is regulating emissions.

SCR (Selective Catalytic Reduction) system has been used as one method for reducing NOx among harmful substances. In the SCR system, the exhaust gas and the reducing agent are brought into contact with the catalyst member at a temperature of 200 to 400 ° C so that NOx contained in the exhaust gas is reduced to nitrogen (N ₂ ) and water by selective reaction with the reducing agent. Or element is used.

In the conventional SCR system, a catalyst for the SCR reaction is installed inside the reactor, and the catalyst member is made of a structural material having a plurality of cells for passing the exhaust gas.

However, the conventional SCR system disadvantageously affects the back pressure of the exhaust gas pipe (EGP) when the exhaust gas discharged from the engine passes through the cell structure of the catalyst member, I had a problem. When the catalyst member is to be removed during operation of a section other than the clean area, it takes a lot of effort and time to separate the catalyst member from the clean area. And there is a problem in that it causes a lot of inconvenience in securing and recombining the catalyst members.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide an exhaust gas purifying apparatus for an internal combustion engine, which is capable of reducing the exhaust interference of the exhaust gas by the catalyst member when the use of the SCR system is unnecessary, , It is possible to eliminate the restriction of the system operation, to easily control the use of the catalyst member without disassembling the catalyst member, and to easily store the unused catalyst member in the reactor.

According to an aspect of the present invention, there is provided an SCR system comprising: a reactor connected to an exhaust line for passing exhaust gas therethrough; A catalyst member located inside the reactor; And a catalyst housing mounted on the catalyst member and configured to be foldable in the reactor to change the position or posture of the catalyst member so that the exhaust gas passes through or bypasses the catalyst member do.

The catalyst housing may be formed such that a mounting hole on which the catalyst member is mounted is opened upward and downward.

The reactor may include a support frame for supporting an edge of the catalyst housing when the catalyst member is used.

The catalyst housing may be single and hinged to the inner surface of the reactor.

The catalyst housings may be hinged to both sides of the reactor so that they can be arranged horizontally.

An interference avoiding groove may be formed in the catalytic housing to avoid interference with any one side of the catalytic housing which is in contact with each other.

And a housing driving unit installed in the reactor to be connected to the catalyst housing and providing a driving force for folding and returning the catalyst housing.

The housing driving unit may include a cylinder hinged to both ends of the reactor and the catalyst housing.

According to another aspect of the present invention, in an SCR system, a catalyst member is installed inside of a reactor connected to an exhaust line so that exhaust gas passes through the catalyst member, and the exhaust gas passes through the catalyst member And a catalyst housing coupled to the reactor to vary the position or posture of the catalyst member.

According to the present invention, when the use of the SCR system is unnecessary as in the case of operating a section other than a clean area by controlling the use of the catalyst member, the back pressure of the exhaust gas is maintained by reducing the exhaust interference of the exhaust gas by the catalyst member The present invention aims to solve the problem of the system operation and to easily control the use of the catalyst member without disassembling the catalyst member and to easily store the unused catalyst member in the reactor.

1 is a cross-sectional view of an SCR system according to a first embodiment of the present invention;
2 is an internal perspective view of an SCR system according to a first embodiment of the present invention.
3 is a perspective view illustrating a catalyst member of the SCR system according to the first embodiment of the present invention.
4 is a perspective view for explaining the operation of the SCR system according to the first embodiment of the present invention;
5 is an internal cross-sectional view of an SCR system according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the following examples can be modified in various forms, and the scope of the present invention is not limited to the following examples.

1 is a cross-sectional view illustrating an SCR system according to a first embodiment of the present invention.

1, an SCR system 100 according to a first embodiment of the present invention includes a reactor 110 connected to an exhaust line 110, a catalyst member 120 located in the reactor 110 And a catalyst housing 130 to which a catalyst member 120 (shown in FIG. 2) is mounted.

The reactor 110 may be connected to an exhaust line 10 through which the exhaust gas from an exhaust gas discharging device, such as a ship or an engine of a floating offshore structure, passes, and may be used to perform a Selective Catalytic Reduction (SCR) do.

Referring to FIGS. 2 and 3, the catalytic member 120 is located inside the reactor 110 to cause a catalytic reaction required for the SCR for the exhaust gas treatment, for example, to reduce NOx contained in the exhaust gas So that the necessary catalytic reaction can be caused. The catalyst member 120 may have a honeycomb structure in which a plurality of quadrangular cells 121 for passing exhaust gas are arranged in a structure for maintaining a predetermined shape as in the present embodiment, In order to form such a structure, the catalyst may be formed by molding the catalyst itself, or may be prepared by a variety of methods including a catalyst containing, coating, attaching, mounting, and the like in a separate member.

Referring to FIG. 2, the catalyst housing 130 is installed inside the reactor 110, and the catalyst member 120 is mounted. When the exhaust gas passes or passes by the catalyst member 120, And is coupled into the reactor 110 so as to vary the position or posture of the catalyst member 120. [ The mounting hole 131 for mounting the catalyst member 120 may be opened up and down and the mounting hole 131 may be formed to correspond to the number of the catalyst members 120 to be mounted. And may be formed as a single or multiple catalysts. In this embodiment, two catalyst members 120 are mounted. Here, the mounting hole 131 may have various coupling structures including a latching portion (not shown) for supporting the lower portion of the catalyst member 120 so as to prevent the catalyst member 120 from falling downward.

The catalyst housing 130 may be coupled to the inside of the reactor 110 so as to control whether the catalyst member 120 is used or not, for example, in a sliding manner or a rotatable manner. For example, So that the position and posture of the catalyst member 120 can be changed.

The catalytic housings 130 may be paired so as to be arranged horizontally as in the present embodiment and may be hinged to the respective sides of the reactor 110 so as to be foldable within the reactor 110, And hinged to a first hinge coupling part 112 provided at both sides of the reactor 110 by a hinge shaft so as to rotate upward in a state of being held horizontal. In addition, the catalytic converters 130 may be formed as a pair so that interference avoiding grooves 132 may be formed on either side of the catalytic housings 130 to avoid interference with each other during rotation. At this time, when the catalyst member 120 is used, the catalyst housing 130 may have a structure in which the end reaches the other catalyst housing 130 so as to minimize the passage of the exhaust gas through the gap with the other catalyst housing 130 The extension portion 133 may be formed.

The reactor 110 may include a support frame 112 for supporting the edge of the catalyst housing 30 when the catalyst member 120 is used. Here, the support frame 112 may be made of, for example, an L-shaped slab, and supports the bottom edge of the catalyst housing 130 to maintain the catalyst housing 130 in a horizontal position.

The catalyst housing 130 may be rotated by an operator to vary the position or attitude of the catalyst member 120 to control the use of the catalyst member 120. In the case of the catalyst housing 130 having a large size or heavy weight, A housing driving unit 140 installed in the reactor 110 to be connected to the catalyst housing 130 may be provided. Here, the housing driving unit 140 can operate by receiving a signal generated by an operation of an operation unit (not shown) from the outside of the reactor 110.

Referring to FIGS. 2 and 4, the housing driving unit 140 includes a reactor 110 and a catalyst housing 130, both ends of which are hinged to each other to provide a driving force for folding and returning the catalyst housing 130, And a plurality of catalyst housings 130 may be provided to correspond to each of the catalyst housings 130 when a plurality of catalyst housings 130 are formed as in the present embodiment. The cylinder 141 is driven by hydraulic pressure or air pressure supplied from the outside so as to rotate or return the catalyst housing 130 by the reciprocating movement of the piston rod 142. Both ends of the cylinder 141, The body and the piston rod 142 can be hinged to the second hinge engaging part 113 provided inside the reactor 110 and the third hinge engaging part 134 provided on the upper surface of the catalyst housing 130 using a hinge shaft have. Further, the cylinder 141 is operated by supplying hydraulic pressure or pneumatic pressure by the controller operation of the operator located outside the reactor 110.

The catalyst housing 130 can be hinged so as to rotate downward in a horizontal state inside the reactor 110, unlike the present embodiment, since the rotating posture of the catalyst housing 130 can be easily changed by the housing driving unit 140. Unlike the cylinder 141 of the present embodiment, the housing driving part 140 transmits the rotating force of the motor to the rotating shaft of the catalyst housing 130 to rotate the catalyst housing 130, The catalyst housing 130 may be rotated by winding or loosening the catalyst housing 130 by the rotational force of the motor.

5 is an internal cross-sectional view illustrating an SCR system according to a second embodiment of the present invention.

5, the SCR system 200 according to the second embodiment of the present invention includes a reactor 210, a catalyst member (not shown), a catalyst member And may include a catalyst housing 230, which, unlike the previous embodiment, may be hinged to the inner surface of the reactor 210 with a single catalyst housing 230. Therefore, the position and posture of the catalyst member can be varied by a single rotation operation with respect to the catalyst housing 230. [

In addition, unlike the SCR systems 100 and 200 according to the first and second embodiments, the SCR system according to the present invention allows the catalytic housing to be changed in position or attitude only with respect to a part of the catalyst members, You can control the use of.

The operation of the SCR system according to the present invention will now be described with reference to the SCR system according to the first embodiment.

When the use of the catalyst member 120 is required for purifying the exhaust gas, such as a ship operating in a clean area, the catalyst housing 130 is connected to the reactor 110, So that the exhaust gas and the reducing agent are brought into contact with the catalyst member 120 at a temperature of 200 to 400 ° C. in the reactor 110, NOx contained in the gas can be removed.

4, when the ship does not use the SCR system and does not use the catalyst member 120 when the ship is operating in a section other than the clean area, the catalyst housing 130 is connected to the reactor (not shown) The catalyst member 120 may be folded from the inside of the catalyst member 120 so as to be raised together with the catalyst member 120 to change the position or posture of the catalyst member 120 so that the exhaust gas bypasses the catalyst member 120, To reduce the back pressure of the exhaust gas and to eliminate the restriction of the operation of the system 100. [

In addition, the use of the catalyst member 120 can be easily controlled without disassembling the catalyst member 120, and the non-used catalyst member 120 can be easily stored in the reactor 110.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is.

10: exhaust line 110: reactor
111: first hinge coupling part 112: support frame
113: second hinge connecting part 120: catalyst member
121: cell 130: catalyst housing
131: mounting hole 132: interference avoiding groove
133: extension part 134: third hinge coupling part
140: housing driving part 141: cylinder
142: Piston rod 210: Reactor
230: catalytic housing 240: housing driving part

Claims (9)

In an SCR system,
A reactor connected to the exhaust line such that exhaust gas is passed therethrough;
A catalyst member located inside the reactor;
A catalyst housing mounted with the catalyst member and foldable in the reactor to change the position or posture of the catalyst member so that the exhaust gas passes through or bypasses the catalyst member; And
And a housing driving unit installed in the reactor to be connected to the catalyst housing and providing a driving force for folding and returning the catalyst housing,
The catalyst housing is rotatably coupled to the reactor and the first hinge engagement,
The housing driving part is rotatably coupled to one side of the reactor and the second hinge coupling part formed on the reactor, and the other side is rotatably coupled to the catalyst hinge and the third hinge coupling part formed on the upper surface of the catalyst housing And a cylinder for operating the hydraulic or pneumatic and expanding and contracting to rotate the catalyst housing. 2. The fuel cell system according to claim 1,
And the mounting hole in which the catalyst member is mounted is formed to be opened up and down. The reactor according to claim 1 or 2,
And a support frame for supporting an edge of the catalyst housing is installed inside when using the catalyst member. The catalyst according to claim 1 or 2,
Wherein the SCR system is hinged to the inner surface of the reactor. The catalyst according to claim 1 or 2,
And each hinged to both sides of the reactor so as to be horizontally arranged. [7] The method according to claim 5,
And an interference avoiding groove is formed on one side of the antenna that is in contact with each other to avoid interference during rotation. delete delete In an SCR system,
And a catalytic member disposed on an inner side of a reactor connected to the exhaust line so as to allow exhaust gas to pass therethrough, A catalyst housing coupled within the reactor; And
And a housing driving unit installed in the reactor to be connected to the catalyst housing and providing a driving force for folding and returning the catalyst housing,
The catalyst housing is rotatably coupled to the reactor and the first hinge engagement,
The housing driving part is rotatably coupled to one side of the reactor and the second hinge coupling part formed on the reactor, and the other side is rotatably coupled to the catalyst hinge and the third hinge coupling part formed on the upper surface of the catalyst housing And a cylinder for operating the hydraulic or pneumatic and expanding and contracting to rotate the catalyst housing.

Images