KR20140140758A - Vane of Ship Engine Exhaust Pipe - Google Patents

Vane of Ship Engine Exhaust Pipe Download PDF

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Publication number
KR20140140758A
KR20140140758A KR1020130061529A KR20130061529A KR20140140758A KR 20140140758 A KR20140140758 A KR 20140140758A KR 1020130061529 A KR1020130061529 A KR 1020130061529A KR 20130061529 A KR20130061529 A KR 20130061529A KR 20140140758 A KR20140140758 A KR 20140140758A
Authority
KR
South Korea
Prior art keywords
exhaust pipe
vane
exhaust gas
engine
ammonia
Prior art date
Application number
KR1020130061529A
Other languages
Korean (ko)
Inventor
이승민
김종화
한주석
유정대
Original Assignee
현대중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020130061529A priority Critical patent/KR20140140758A/en
Publication of KR20140140758A publication Critical patent/KR20140140758A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/32—Arrangements of propulsion power-unit exhaust uptakes; Funnels peculiar to vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an exhaust pipe structure for exhausting exhaust gas generated from an engine of a ship, and more particularly, to an internal structure of an exhaust pipe for switching the flow direction of exhaust gas to effectively remove nitrogen oxides contained in the exhaust gas.
According to another aspect of the present invention, there is provided an exhaust pipe extending from an engine to an SCR chamber, wherein a vane is provided in front of a line for supplying ammonia to an exhaust pipe, exhaust gas discharged from the engine is raised and lowered by a vane, And the ammonia supplied through the line are mixed with each other.

Description

[0001] Vane of Ship Engine Exhaust Pipe [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust pipe structure for exhausting exhaust gas generated from an engine of a ship, and more particularly to an exhaust pipe internal structure for changing the direction of exhaust gas flow so as to effectively remove nitrogen oxides contained in the exhaust gas.

Generally, an SCR (Selective Catalytic Reduction) system for removing nitrogen oxides in the exhaust gas of engines, incinerators and industrial combustion facilities using various fossil fuels such as gasoline, diesel, bunker oil, LNG, LPG, Ammonia gas is directly used as a chemical substance for reducing ammonia, or the urea solution is supplied to the exhaust pipe due to safety and convenience of use and storage, and the urea is vaporized into ammonia by exhaust gas heat to remove nitrogen oxides.

1 is a conceptual view showing a structure of an exhaust pipe of a marine engine according to the prior art.

As shown in Fig. 1, an exhaust pipe 7 extending from the engine 1 of the ship is connected to the SCR chamber 3 after extending upward. A spray 9 is provided in the middle of the exhaust pipe 7 in the exhaust pipe 7 constructed as described above and the urea is sprayed through the spray 9 to be supplied into the exhaust pipe 7. The urea injected inside the exhaust pipe 7 is vaporized into ammonia by the heat of the exhaust gas, and then the nitrogen oxide is reduced by promoting the reaction of the catalyst 5.

On the other hand, conventionally, when the exhaust gas and the ammonia flow together, the concentration of the ammonia flows into the SCR chamber 3 in a non-uniform state. As the concentration of ammonia is uneven, the effect of the catalytic reaction is deteriorated and the reduction rate of nitrogen oxides is lowered. That is, the exhaust gas discharged from the engine flows due to the internal pressure difference, and there is no facility for switching the flow mode of the exhaust gas separately. Therefore, there is a problem that the injected urea is not uniformly mixed with the exhaust gas, There is a drawback that the removal efficiency of the oxide is lowered.

Korean Patent Laid-Open Publication No. 10-2012-0009332 (published on February 21, 2012)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide an exhaust gas purifying apparatus, which is capable of uniformly maintaining the concentration of ammonia by smoothly mixing exhaust gas discharged from an engine and vaporized ammonia in an exhaust pipe The purpose of this vane is to provide a vane of a ship engine exhaust duct to be converted.

According to another aspect of the present invention, there is provided an exhaust pipe extending from an engine to an SCR (Selective Catalytic Reduction) chamber, wherein a vane is provided in front of or behind the line for supplying ammonia to the exhaust pipe, So that the concentration of the ammonia supplied is uniformed or the concentration of ammonia is made uniform by rotating the exhaust gas mixed with ammonia.

Further, according to a preferred embodiment of the present invention, the vane is a plate structure having a linear side smaller than the arc of the inner radius of curvature of the exhaust pipe and the diameter of the exhaust pipe, and the cross sectional area of the vane is smaller than half of the cross sectional area of the exhaust pipe.

According to a preferred embodiment of the present invention, the vane is fixed to one side and the other side of the exhaust pipe at right angles to each other, and a gap is formed between the vane fixed on one side and the vane fixed on the other side.

Further, according to a preferred embodiment of the present invention, the arc of the vane is fixed to the inner circumferential surface of the exhaust pipe.

As described above, the vane of the ship engine exhaust pipe according to the present invention is constructed such that the exhaust gas discharged from the engine rises in a vortex form by the vane mounted on the exhaust pipe, the urea injected through the spray is uniformly mixed with the exhaust gas There is an advantage that the removal efficiency of nitrogen oxides can be improved.

1 is a conceptual view showing a structure of an exhaust pipe of a marine engine according to the prior art.
2 is a side view showing a vane structure provided in an exhaust pipe of a marine engine according to the present invention,
3 is a plan sectional view showing the vane structure shown in Fig. 2,
Fig. 4 is a conceptual diagram for explaining a relationship in which the exhaust gas rises and rises by the vanes shown in Figs. 2 and 3. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a vane of a ship engine exhaust pipe according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a side view showing a vane structure provided in an exhaust pipe of a marine engine according to the present invention, FIG. 3 is a plan view of a vane structure shown in FIG. 2, and FIG. 4 is a cross- And the exhaust gas is rotated by the vane.

2, an exhaust pipe 7 extending from the engine 1 is extended to the SCR chamber 3 and a line for supplying urea is passed through the exhaust pipe 7 at the middle portion of the exhaust pipe 7 A spray (9) is mounted on the end of the urea supply line (10) and injects urea into the exhaust pipe (7).

A vane 100 for switching the flow direction of the exhaust gas is provided between the point where the spray 9 is mounted and the SCR chamber 3. Therefore, the exhaust gas discharged from the engine 1 flows along the exhaust pipe according to the exhaust pressure difference, and the ammonia generated by vaporization of the urea injected from the spray flows together with the exhaust gas along the exhaust pipe. When the concentration of ammonia is examined, the concentration of the central portion of the exhaust pipe 7 equipped with the spray 9 is high and the concentration of ammonia becomes lower toward the inner edge of the exhaust pipe 7.

In this state, the ammonia flows along with the exhaust gas along the exhaust pipe, enters the vane 100, and the flow direction of the exhaust gas is switched by the vane 100.

2 and 3, a pair of vanes 100 is mounted inside the exhaust pipe 7. The vane 100 is connected to the arc 101 of the inner radius of curvature of the exhaust pipe 7 and the exhaust pipe Sectional area smaller than half the cross-sectional area of the exhaust pipe 7, which has a straight side 103 smaller than the diameter of the exhaust pipe 7. The arc of the vane 100 is fixed to the inside of the exhaust pipe 7 so that the pair of vanes 100 constructed as described above are perpendicular to the inner left and right sides of the exhaust pipe 7.

3, since the vane 100 has an area smaller than half the sectional area of the exhaust pipe 7, the vane 100 fixed to the left side and the vane 100 fixed to the right side are spaced apart from each other do.

4, the exhaust gas and the ammonia that have entered the vane 100 are raised from the outer side of the exhaust gas by the vane 100 fixed to both sides of the exhaust pipe 7 of the engine 1, So that the exhaust gas is entirely rotated.

As the exhaust gas is rotated and raised by the vane 100, the concentration of ammonia contained in the exhaust gas becomes uniform, and the exhaust gas enters the SCR chamber 3 together with the ammonia at a uniform concentration, ≪ / RTI > Therefore, as the ammonia is uniformly mixed into the exhaust gas, the removal efficiency of the nitrogen oxide contained in the exhaust gas can be improved.

Although the pair of vanes 100 are described as being fixed to the left and right sides of the ship engine exhaust pipe 7 in the embodiment of the present invention as described above, the pairs of vanes in the longitudinal direction of the exhaust pipe 7 are aligned, It is possible to induce the exhaust gas flowing along the exhaust pipe 7 to rotate and rise.

Although the vane 100 described above is installed behind the spray 9, it is possible to uniformize the concentration of ammonia by injecting urea into the exhaust gas that rises as the vane is installed in front of the spray.

1: engine
3: SCR chamber
5: Catalyst
7: Exhaust pipe
9: Spray
10: Urea supply line
100: Vane
101: arc
103: Straight line

Claims (4)

An exhaust duct extending from the engine to a Selective Catalytic Reduction (SCR) chamber,
A vane is installed at the front or rear of the line for supplying ammonia to the exhaust pipe so that the exhaust gas discharged from the engine rises by the vane and uniformizes the concentration of the ammonia supplied or the exhaust gas mixed with ammonia is raised to uniformize the concentration of ammonia And the vanes of the engine engine exhaust pipe.
The method according to claim 1,
Wherein the vane is a plate structure having a straight line having an arc of an inner radius of curvature of the exhaust pipe and a diameter smaller than the diameter of the exhaust pipe, wherein the cross sectional area of the vane is less than half of the cross sectional area of the exhaust pipe.
3. The method of claim 2,
Wherein the vane is fixed to one side and the other side of the exhaust pipe at right angles to each other, and a gap is formed between the vane fixed to one side and the vane fixed to the other side.
The method of claim 3,
And the arc of the vane is fixed to the inner circumferential surface of the exhaust pipe.
KR1020130061529A 2013-05-30 2013-05-30 Vane of Ship Engine Exhaust Pipe KR20140140758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130061529A KR20140140758A (en) 2013-05-30 2013-05-30 Vane of Ship Engine Exhaust Pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130061529A KR20140140758A (en) 2013-05-30 2013-05-30 Vane of Ship Engine Exhaust Pipe

Publications (1)

Publication Number Publication Date
KR20140140758A true KR20140140758A (en) 2014-12-10

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KR1020130061529A KR20140140758A (en) 2013-05-30 2013-05-30 Vane of Ship Engine Exhaust Pipe

Country Status (1)

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