KR101675463B1

KR101675463B1 - Marine engine exhaust gas purification apparatus

Info

Publication number: KR101675463B1
Application number: KR1020150061957A
Authority: KR
Inventors: 김혜삼; 이배균; 이호제; 신승엽
Original assignee: 대지금속 주식회사
Priority date: 2015-04-30
Filing date: 2015-04-30
Publication date: 2016-11-11
Also published as: KR20160129589A

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marine engine exhaust gas purifying apparatus for reducing exhaust gas generated in a marine diesel engine using a selective catalytic reduction (SCR) system, The present invention relates to a marine engine exhaust gas purifying apparatus configured to be capable of easily expanding or replacing an exhaust gas discharged from a maritime diesel engine and increasing the efficiency of exhaust gas discharged from a marine diesel engine. A casing portion communicating with the inlet portion, the casing portion being provided inside the catalyst portion for reducing the exhaust gas mixed with the reducing agent; And a discharging portion connected to the casing portion and communicating with the casing portion and discharging the exhaust gas purified by the catalyst portion, wherein the catalyst portion includes a plurality of catalyst units stacked in a plurality of unit catalysts, Direction to form a hexahedron shape.

Description

Technical Field [0001] The present invention relates to a marine engine exhaust gas purification apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marine engine exhaust gas purifying apparatus for reducing exhaust gas generated in a marine diesel engine using a selective catalytic reduction (SCR) system, The present invention relates to a marine engine exhaust gas purifying apparatus configured to be capable of easily expanding or replacing an exhaust gas discharged from a marine diesel engine.

In general, the exhaust gas from diesel engines contains nitrogen oxides, which are the main causes of air pollution.

Accordingly, various purification apparatuses for removing nitrogen oxides contained in the exhaust gas have been developed. Among them, a selective catalyst that exhaust gas and a reducing agent are passed together through a catalyst to reduce nitrogen oxides contained in the exhaust gas to nitrogen and water vapor A purification apparatus to which a reduction method is applied is widely used.

Such a purifier is installed in a ship or a plant equipped with a diesel engine and is used for purifying a large amount of exhaust gas discharged from the diesel engine.

However, the existing purification apparatus has a disadvantage that it is difficult to apply to a large-scale marine diesel engine because it uses a catalyst made of a simple cylindrical shape by an extrusion molding process.

Because large-sized extrusion dies are required to produce cylindrical catalysts in large capacity in response to large-scale marine diesel engines, it is realistic to have a large number of expensive extrusion dies depending on the type and size of marine diesel engines It is difficult.

Accordingly, attempts have been made to increase the capacity by stacking a plurality of cylindrical catalysts in the length and area directions. However, in the above method, there is a limit to canning a plurality of cylindrical catalysts, It is difficult to mutually assemble the cylindrical catalysts.

In addition, since the performance of the catalyst deteriorates as the use time of the purifier deteriorates, it is essential to replace the catalyst with deteriorated performance. Therefore, in the purification apparatus for the marine diesel engine, It is difficult to replace the catalyst.

The present applicant has proposed the present invention in order to solve the above problems, and related prior art documents include a muffler for a diesel vehicle equipped with a selective NOx removal catalyst No. 20-0438616, .

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a diesel engine which can be expanded to a size corresponding to the size of a marine diesel engine so as to purify a large amount of exhaust gas generated in a large ship or plant employing a large- It is possible to provide a marine engine exhaust gas purifying apparatus having a catalytic portion.

According to the present invention, there is provided an exhaust gas purifying apparatus comprising: an inflow portion into which exhaust gas and a reducing agent flow; A casing portion communicating with the inlet portion, the casing portion being provided inside the catalyst portion for reducing the exhaust gas mixed with the reducing agent; And a discharging portion connected to the casing portion and communicating with the casing portion and discharging the exhaust gas purified by the catalyst portion, wherein the catalyst portion includes a catalyst unit including at least one unit catalyst, To form a hexahedron shape.

The catalyst unit may include at least one unit catalyst provided in the longitudinal direction of the casing unit; A catalyst cover surrounding the periphery of the unit catalyst; And a coupling groove formed at the other end in the longitudinal direction of the catalyst cover and into which one end portion in the longitudinal direction of the catalyst cover is inserted.

In addition, binding portions that extend the plurality of catalyst units in the direction of the width of the casing portion may be respectively provided at both ends of the catalyst portion in the longitudinal direction.

The connecting portion may include an opening through which the catalyst covers of the plurality of catalyst units are inserted, respectively; And a support portion for partitioning the opening portion, wherein the support portion can support a plurality of catalyst cover end portions inserted into the opening portion.

The plurality of catalyst units coupled to each other in the longitudinal direction of the casing unit may have different lengths, and the plurality of catalyst units may have a shorter length in the flow direction of the exhaust gas.

In addition, the coupling portion may be provided at a coupling portion of the plurality of catalyst units coupled in the longitudinal direction of the casing portion.

Further, the inflow portion may include a first inflow path through which the exhaust gas flows; A second inflow path through which the reducing agent flows; A mixing space in which the exhaust gas and the reducing agent respectively introduced through the first inlet and the second inlet are mixed; And a buffer space communicably connected to the mixing space to slow the flow rate of the exhaust gas mixed with the reducing agent.

In addition, a first dispersion member for dispersing or diffusing the flow direction of the exhaust gas may be provided at the outlet side of the first inflow path.

The first dispersion member may include a diffusion plate mounted on a discharge port of the first inflow path and having an inner diameter gradually widened along a flow direction of the exhaust gas flowing through the first inflow path; A plurality of horizontal plates provided at an interval on the inner surface of the diffusion plate; And a vertical plate provided at a plurality of spaced apart from each other at an inner surface of the diffusion plate and intersecting with the horizontal plate.

In addition, a second dispersion member may be provided between the mixing space and the buffer space, and the second dispersion member may disperse or diffuse the flowing direction of the exhaust gas mixed with the reducing agent in the mixing space.

In addition, the second dispersion member may include a lattice-shaped plate; And a guide piece provided to be inclined in one direction or another direction on the grid-like plate, wherein the plurality of guide pieces can be inclined toward mutually offset directions.

Since the catalyst portion for purifying the exhaust gas has a configuration capable of selectively expanding in correspondence with the size of the marine diesel engine, the marine engine exhaust gas purifying apparatus of the present invention can be easily used for a marine diesel engine having various sizes .

Further, in the marine engine exhaust gas purifying apparatus of the present invention, when the operator performs an operation of checking or replacing the unit catalyst of the catalytic unit, it is not necessary to separate the catalytic unit from the whole of the catalytic unit Only the catalyst unit requiring inspection or replacement can be separated, so that it is possible to detect and replace the unit catalyst in question at an early stage, so that maintenance of the unit catalyst can be simplified.

In addition, since the hexagonal catalytic portion produced by laminating a plurality of unit catalysts having the same shape is used, the reaction area between the exhaust gas and the catalytic portion is increased to improve the purification efficiency of the exhaust gas So that the size of the entire purifier can be reduced.

Further, in the marine engine exhaust gas purifying apparatus of the present invention, the mixing efficiency of the exhaust gas and the reducing agent is raised by the first dispersing member and the second dispersing member, and the flow direction of the exhaust gas mixed with the reducing agent is dispersed or diffused So that the unit catalyst and the exhaust gas are uniformly reacted.

1 is a perspective view of a marine engine exhaust gas purifying apparatus according to an embodiment of the present invention;
FIG. 2 is a side view schematically showing an internal configuration of a marine engine exhaust gas according to an embodiment of the present invention; FIG.
3 is a perspective view of a catalyst unit according to an embodiment of the present invention;
4 is an exploded perspective view of a catalyst unit according to an embodiment of the present invention;
5 is a sectional view showing a state in which the catalyst unit according to the embodiment of the present invention is coupled in the longitudinal direction.
6 is a perspective view of a first dispersion member according to an embodiment of the present invention as viewed from front and rear;
7 is a perspective view of a second dispersion member according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings.

It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Hereinafter, a marine engine exhaust gas purifying apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7. FIG. In describing the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as not to obscure the gist of the invention.

1 and 2, an apparatus 100 for cleaning exhaust gas for marine engines according to an embodiment of the present invention includes an inlet 110 through which exhaust gas and a reducing agent flow, A catalytic unit 200 communicably connected to the catalytic unit 200 to reduce the exhaust gas mixed with the reducing agent, and a casing unit 130 connected to the casing unit 130, And a discharge unit 150 through which the exhaust gas purified by the exhaust unit 150 is discharged.

The exhaust gas purifying apparatus 100 for marine engine exhaust gas according to an embodiment of the present invention is configured such that exhaust gas discharged from a diesel engine (not shown) flows through the inlet 110, the casing 130, ), And then purified.

3 to 5, the catalyst unit 200 provided in the casing unit 130 and reducing the exhaust gas mixed with the reducing agent may include a plurality of catalyst units 211 including at least one unit catalyst 211, The catalyst unit 210 may be formed in a hexahedron shape by connecting the catalyst unit 210 in the longitudinal direction and the width direction of the casing unit 130.

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Here, the catalyst unit 200 may include a plurality of catalyst units 210 arranged in a lengthwise direction of the catalyst unit 210 in a lengthwise direction of 2 × 2 × n, 3 × 3 × n, 4 × 4 × n, It can be expanded and combined into a form. For reference, in the embodiment of the present invention, the plurality of catalyst units 210 are combined into a 2x2x2 form so that the catalyst unit 200 has a hexahedral shape.

Therefore, in the apparatus 100 for cleaning exhaust gas for marine engines according to the embodiment of the present invention, the shape of the casing part 130 for accommodating the catalyst part 200 is also made to be a hexahedron type as shown in FIG. 1 So that the space in the ship can be used more efficiently than the purifier having the casing of the conventional cylindrical shape.

The catalyst unit 210 of the catalyst unit 200 includes at least one unit catalyst 211 provided along the longitudinal direction of the casing unit 130 and a catalyst cover 210 surrounding the circumferential surface of the unit catalyst 211 And a coupling groove 215 formed at the other end in the longitudinal direction of the catalyst cover 213 and having one longitudinal end portion of the catalyst cover inserted therein.

The unit catalyst 211 may have a cube shape or a rectangular parallelepiped shape and may be provided along the length direction of the casing unit 130 according to the size of the diesel capacity.

The catalyst cover 213 protects the unit catalyst 211 from external impact and prevents the exhaust gas flowing into the unit catalyst 211 from flowing out to the outside. The catalyst cover 213 may surround the remaining circumferential surfaces of the unit catalyst 211 except for the laminated surface. That is, the catalyst cover 213 may be formed in the shape of a rectangular barrel having both longitudinal ends thereof opened.

As shown in FIG. 5, one end in the longitudinal direction and the other end in the longitudinal direction of the catalyst cover 213 are longer than the lengths of the plurality of unit catalysts 211 accommodated in the inner space of the catalyst cover 213, Direction. That is, the unit catalyst 211 is disposed and accommodated in the remaining space region of the catalyst cover 213 except for a space defined by one longitudinal end portion of the catalyst cover 213 and the other longitudinal end portion.

5, one longitudinal end portion of the catalyst cover 211 can be inserted into the coupling groove 215 formed at the other end in the longitudinal direction of another catalyst cover 211, 210 may be coupled and extended in the longitudinal direction of the casing unit 130.

Meanwhile, as shown in FIG. 5, the plurality of catalyst units 210 coupled in the longitudinal direction of the casing unit 130 may have different lengths. At this time, the plurality of catalyst units 210 may be shorter in length in the flow direction A of the exhaust gas 210. For reference, in the embodiment of the present invention, a pair of catalyst units 210 are shown in the description and drawings as being extended in the longitudinal direction.

5, the length D2 of the catalyst unit 210 disposed closer to the exhaust direction of the exhaust gas than the length D1 of the catalyst unit 210 disposed close to the exhaust gas inflow direction Is formed to be short.

This is because the exhaust gas flowing into the first inlet path 111 is primarily purified by the unit catalysts 211 of the catalyst unit 210 arranged close to the inlet 110, Is cleaned by the unit catalysts 211 of the catalyst unit 210 arranged close to the discharge unit 150. [

That is, since the exhaust gas that has been primarily purified is already introduced into the catalyst unit 210 disposed adjacent to the exhaust unit 150, the unit of the catalyst unit 210 disposed close to the exhaust unit 150 This is because even if the number of the catalysts 211 is smaller than the number of the unit catalysts 211 of the catalyst unit 210 arranged close to the inlet 110, the exhaust gas can sufficiently purify the exhaust gas.

Accordingly, the entire length of the catalyst unit 210 disposed in the exhaust direction of the exhaust gas, that is, in proximity to the exhaust unit 150 is set to be close to the inflow direction of the exhaust gas, that is, It is possible to prevent the catalyst unit 200 from being unnecessarily enlarged by forming the catalytic unit 210 shorter than the entire length of the catalytic unit 210.

The catalyst unit 200 may further include a binding unit 240 as shown in FIGS. 3 and 4. The coupling units 240 are provided at both ends of the catalyst unit 200 in the longitudinal direction so that the plurality of catalyst units 210 can be extended in the direction of the width of the casing unit 130.

That is, the binding portion 240 is formed in the shape of a window frame as a whole, and includes an opening portion 241 through which the catalyst cover 213 of the plurality of catalyst units 210 is inserted, and a support portion 241 through which the opening portion 241 is divided. (243).

The openings 241 may be formed in a number corresponding to the number of the catalyst units 210 extending in the width direction of the casing unit 130. In the embodiment of the present invention, × 2 × 2 × 2 in the longitudinal × longitudinal direction is used, and the number may be four.

The support portion 243 defines the opening 241 such that the opening 241 is formed in a number corresponding to the number of the catalyst units 210.

The support portion 243 may support the end portion of the catalyst cover 213 inserted into the opening portion 241 and passed through the opening portion 241.

Accordingly, the plurality of catalyst units 210 can be extended in the width direction of the casing unit 130 by supporting one end or the other end of the catalyst unit 210 by the coupling unit 240.

The coupling units 240 are provided at both ends of the catalytic unit 200. However, the present invention is not limited thereto, and the plurality of catalytic units 210, which are coupled in the longitudinal direction of the casing unit 130, As shown in FIG.

3, the binding unit 240 may include a catalytic cover 213 of the catalyst unit 210 and a catalytic unit 210 of another catalytic unit 210 coupled to the catalytic unit 210, The cover 213 may be provided between the ends of the cover 213 to improve the supporting force of the catalyst unit 200.

Therefore, the catalyst unit 200 according to the embodiment of the present invention can be selectively expanded corresponding to the size of the marine diesel engine, so that the catalyst unit 200 can be easily compatible with various sizes of marine diesel engines. There is an advantage.

When the operator performs an operation of checking or replacing the unit catalyst 211 of the catalyst unit 200, it is not necessary to completely separate the catalyst unit 200 in the purification apparatus 100, The unit catalyst 211 can be more easily maintained and the unit catalyst 211 which is a problem can be detected and replaced in an early stage because only the catalyst unit 210 requiring inspection or replacement is separated from the catalyst units 210 have.

2, the inlet 110 according to the embodiment of the present invention includes a first inlet 111 through which exhaust gas flows, a second inlet 113 through which the reducing agent flows, A mixing space S1 in which exhaust gas and a reducing agent respectively introduced through the first inlet 111 and the second inlet 113 are mixed and a mixing space S1 communicably connected to the mixing space S1, And a buffer space S2 for delaying the flow rate of the mixed exhaust gas.

The first inlet 111 may be connected to one end of the exhaust gas outlet of the marine diesel engine (not shown) in a communicable manner.

The second inflow path 113 is connected to a reducing agent injecting device (not shown) to receive the reducing agent from the reducing agent injecting device.

Here, a first dispersing member (not shown) for dispersing or diffusing the flow direction of the exhaust gas is disposed at a discharge port side through which the exhaust gas flowing through the other end of the first inflow path 111, that is, one end of the first inflow path 111, (115).

2 and 6, the first dispersion member 115 is mounted on the discharge port side of the first inflow path and has a flow direction of the exhaust gas flowing through the first inflow path 111 And a plurality of horizontal plates 115b spaced from each other at an inner surface of the diffusion plate 115a and a plurality of horizontal plates 115b spaced apart from each other at an inner surface of the diffusion plate 115a, And a vertical plate 115c that is provided at a predetermined distance from the inner surface of the horizontal plate 115a and intersects with the horizontal plate 115b.

The diffusion plate 115a may be formed into a hopper or a funnel shape having an inner diameter gradually widened along the flow direction of the exhaust gas so that the diffusion plate 115a can diffuse the exhaust gas flowing into the first inlet path 111 have.

The horizontal plate 115b may be inclined upward or downward from the inner surface of the diffusion plate 115a. The vertical plate 115c may be inclined leftward or rightward from the inner surface of the diffusion plate 115a.

The horizontal plate 115b and the vertical plate 115c configured as described above cooperatively form a plurality of lattice-like discharge ports through which the exhaust gas flowing into the diffusion plate 115a is discharged.

The exhaust gas flowing into the first inflow passage 111 can be diffused in the flow direction in a dispersed state and discharged to the mixing space S1 by the first dispersing member 115 having the above- Accordingly, it can be uniformly mixed with the reducing agent introduced into the second inflow path 113.

The second dispersion member 120 may be disposed between the mixing space S1 and the buffer space S2.

2 and 7, the second dispersion member 120 divides the mixing space S1 and the buffer space S2 and flows into the mixing space S1 to mix with the reducing agent Thereby allowing the exhaust gas to flow into the buffer space S2.

7, the second dispersion member 120 includes a lattice-like plate 121 and a plurality of guide pieces 122 sloped in one direction or the other direction on the lattice-like plate 121, . &Lt; / RTI >

The lattice plate 121 may have a plurality of horizontal bars 121a and vertical bars 121b intersecting at a predetermined interval to form a lattice shape.

The plurality of guide pieces 122 are inclined in one direction or another direction toward the direction in which the catalyst unit 200 is disposed on the plurality of the horizontal bars 121a or the vertical bars 121b. For reference, in the embodiment of the present invention, the plurality of guide pieces 122 are provided on the plurality of horizontal bars 121a.

The plurality of guide pieces 122 may be formed so as to be inclined toward the opposite directions on the plurality of the horizontal bars 121a or the vertical bars 121b so that the exhaust gas mixed with the reducing agent may be dispersed .

Therefore, the exhaust gas mixed with the reducing agent in the mixing space S1 flows into the buffer space S2 in a state of being dispersed or diffused in one direction or the other direction by the second dispersing member 120 constructed as described above. .

The buffer space S2 provides a time and space in which the exhaust gas mixed with the reducing agent can be dispersed or diffused before being introduced into the catalyst unit 200, (Not shown).

Since the catalyst unit 200 having the hexahedral shape formed by expanding the plurality of catalyst units 210 having the same shape is used in the apparatus 100 for purifying exhaust gas for marine engines according to the embodiment of the present invention, The reaction area of the exhaust gas and the catalytic portion 200 is increased to increase the purifying efficiency of the exhaust gas, thereby reducing the size of the entire purifier.

The apparatus 100 for purifying exhaust gas for marine engines according to the embodiment of the present invention configured as described above is configured such that the mixing efficiency of the exhaust gas and the reducing agent is reduced by the first dispersing member 115 and the second dispersing member 120, So that the flow direction of the exhaust gas mixed with the reducing agent is dispersed or diffused to uniformly react the exhaust gas with the unit catalyst 211.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments.

Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

100: Marine engine exhaust gas purifying device 110:
111: first inlet path 113: second inlet path
115: first dispersion member 120: second dispersion member
130: casing part 150:
200: catalytic unit 210: catalytic unit
211: unit catalyst 213: catalyst cover
215: coupling groove 240:

Claims

An inlet through which exhaust gas and a reducing agent flow;
A casing portion communicating with the inlet portion, the casing portion being provided inside the catalyst portion for reducing the exhaust gas mixed with the reducing agent; And
And a discharge portion communicably connected to the casing portion and discharging the exhaust gas purified by the catalyst portion,
Wherein the catalyst portion comprises:
A plurality of catalyst units including at least one unit catalyst are formed in a hexahedral shape by joining the catalyst units in the longitudinal direction and the width direction,
Wherein the catalyst unit comprises:
At least one unit catalyst provided in a longitudinal direction of the casing unit so as to be elongated in the longitudinal direction of the casing unit;
A catalyst cover formed to surround the circumferential surface of the unit catalyst; And
A coupling groove formed at the other longitudinal end portion of the catalyst cover so that one end portion of the catalyst cover in the longitudinal direction of the catalyst cover of the other catalyst unit disposed adjacent to the catalyst cover is engaged;
And an exhaust gas purifying device for purifying exhaust gas from the engine.

The method according to claim 1,
Wherein the catalyst cover is formed in a cylindrical shape that opens in the longitudinal direction of the casing portion,
Wherein one end and the other end of the catalyst cover are formed to protrude further in the longitudinal direction of the casing than the unit catalyst,
Wherein the coupling groove is formed in a groove shape along the other end of the catalyst cover so that one end of the catalyst cover of another catalyst unit disposed adjacent to the catalyst cover is inserted.

3. The method according to claim 1 or 2,
And a connecting portion for connecting the ends of the catalytic units to extend the plurality of catalytic units in the direction of the width of the casing,
Wherein the binding portion is formed in a window frame shape in which end portions of the catalytic units are inserted and supported.

The method of claim 3,
The binding portion
A plurality of openings through which catalyst covers of the plurality of catalyst units are inserted one by one; And
And a support for partitioning the plurality of openings,
Wherein the support portion is formed to support a plurality of catalyst cover ends inserted into the openings.

The method according to claim 1,
The plurality of catalyst units coupled in the longitudinal direction of the casing unit have different lengths,
Wherein the plurality of catalyst units are formed to be shorter in length in the flow direction of the exhaust gas.

The method of claim 3,
Wherein a plurality of the catalyst units are arranged in a state where they are coupled to each other in a longitudinal direction of the casing unit,
Wherein the coupling portion is provided at a coupling portion between the plurality of catalyst units to secure a supporting force between the adjacent plurality of catalyst units.

The method according to claim 1,
Wherein:
A first inflow path through which the exhaust gas flows;
A second inflow path through which the reducing agent flows;
A mixing space in which the exhaust gas and the reducing agent respectively introduced through the first inlet and the second inlet are mixed; And
And a buffer space communicably connected to the mixing space to slow the flow rate of the exhaust gas mixed with the reducing agent.

8. The method of claim 7,
And a first dispersing member for dispersing or diffusing the flow direction of the exhaust gas is provided at the exhaust port side of the first inflow path.

9. The method of claim 8,
Wherein the first dispersion member comprises:
A diffusion plate mounted on a discharge port of the first inflow path and having an inner diameter gradually widened along a flow direction of the exhaust gas flowing through the first inflow path;
A plurality of horizontal plates provided at an interval on the inner surface of the diffusion plate; And
And a vertical plate provided on the inner surface of the diffusion plate at a predetermined interval and intersecting with the horizontal plate.

8. The method of claim 7,
A second dispersion member is provided between the mixing space and the buffer space,
Wherein the second dispersion member comprises:
Wherein the flow direction of the exhaust gas mixed with the reducing agent is dispersed or diffused in the mixing space.

11. The method of claim 10,
Wherein the second dispersion member comprises:
A lattice-shaped plate; And
And a guide piece sloped in one direction or another direction on the grid-like plate,
Wherein the plurality of guide pieces are inclined toward a direction in which the guide pieces are offset from each other.