WO2010137829A2 - Burner and aftertreating device of exhaust gas - Google Patents

Burner and aftertreating device of exhaust gas Download PDF

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Publication number
WO2010137829A2
WO2010137829A2 PCT/KR2010/003238 KR2010003238W WO2010137829A2 WO 2010137829 A2 WO2010137829 A2 WO 2010137829A2 KR 2010003238 W KR2010003238 W KR 2010003238W WO 2010137829 A2 WO2010137829 A2 WO 2010137829A2
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WO
WIPO (PCT)
Prior art keywords
exhaust gas
flame
burner
tube
protecting tube
Prior art date
Application number
PCT/KR2010/003238
Other languages
French (fr)
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WO2010137829A3 (en
Inventor
Youngshol Kim
Yongwoo Kim
Sunghwan Kim
Hongseok Jung
Yunsik Kim
Original Assignee
Sk Energy Co., Ltd.
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Publication date
Application filed by Sk Energy Co., Ltd. filed Critical Sk Energy Co., Ltd.
Publication of WO2010137829A2 publication Critical patent/WO2010137829A2/en
Publication of WO2010137829A3 publication Critical patent/WO2010137829A3/en

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    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/14—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel burner
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated

Definitions

  • the present invention relates to a burner and an aftertreating device of exhaust gas, and more particularly, to a burner and an aftertreating device of exhaust gas, which increases a mixing degree of exhaust gas and flame so as to properly increase a temperature of the exhaust gas, and also enhances combustion efficiency of a diesel particulate filter, thereby efficiently reducing the emissions of exhaust gas.
  • a diesel engine is widely used in a vehicle, a construction machine, a ship and the like, because of its higher power and lower fuel cost than a gasoline engine.
  • the diesel engine is four-stroke engine in which fuel is injected into an engine and then burnt by the compression ignition method, and incomplete combustion occurs in a self-ignition process of the fuel due to non-uniformity of fuel-air mixture, and thus noxious particles (exhaust gas) are generated.
  • the noxious particles mainly contain NOx, particulate matter and soot.
  • the noxious particles generated from the diesel engine form 40% of air pollution. Therefore, the exhaust gas is strictly controlled in many countries.
  • an aftertreating device of exhaust gas which is disposed at a vent pipe so as to reduce the exhaust gas.
  • the exhaust gas generated in the diesel engine is flowed into a filter having a catalyst so as be burnt in the filter, thereby reducing the emissions of exhaust gas discharged into the air.
  • Korean Patent Application No.10-1997-007901 (entitled: a burner for an exhaust gas purification device) and Korean Patent No.0548451 (an inner flame burner for regeneration of diesel particulate filter), the temperature of the exhaust gas is increased by the burner so as to increase the rate of combustion.
  • a burner for an aftertreating device of exhaust gas which has a mixing means such as a baffle and a perforated plate so as to control flow of exhaust gas or flame in a combustion chamber.
  • the mixing means is disposed in a space that the flame is formed, back pressure may be increased. If the back pressure is increased, power is reduced and thus driving comfort is deteriorated.
  • the mixing means may be a factor of disturbing the forming of the flame, in case of the incomplete combustion in the burner, the noxious particles (exhaust gas) may be further generated, thereby reducing the emissions of exhaust gas reduction efficiency.
  • An object of the present invention is to provide a burner and an aftertreating device of exhaust gas, which stably forms flame, increases a mixing degree of exhaust gas and flame so as to uniformly increase a temperature of the exhaust gas, and also increases combustion efficiency of a diesel particulate filter so as to efficiently reduce the exhaust gas.
  • the present invention provides a burner 100 including a combustion chamber 110 in which a flame forming part 112 is formed at one side, and an outlet port 115 that is connected with a vent pipe 400 so as to discharge exhaust gas is formed at the other side, the flame forming part 112 including an inlet port 111 connected with the vent pipe 400 so as to introduce the exhaust gas, a nozzle 113 for injecting fuel and forming flame and an ignition means; an exhaust gas flowing tube 120 which is formed in the combustion chamber 110 so as to be communicated with the inlet port 111 so that the exhaust gas is flowed therethrough, and in which a plurality of first hollow portions 121 are formed at an outer surface so as to leak the exhaust gas; and a flame protecting tube 130 which is formed in the combustion chamber 110 so as to be communicated with the flame forming part 112, and in which a plurality of second hollow portions 131 are formed at an outer surface so as to leak the flame, wherein the exhaust gas flowing tube 120 and the flame protecting tube 130 are disposed to be parallel
  • the first hollow portions 121 of the exhaust gas flowing tube 120 are formed to be adjacent to the inlet port 111, and the second hollow portions 131 of the flame protecting tube 130 are formed to be adjacent to the outlet port 115.
  • the flame protecting tube 130 is provided with a flame blocking plate 132 disposed at an end thereof.
  • the flame blocking plate 132 vertically blocks the flame protecting tube 130 so as to close the end of the flame protecting tube 130.
  • the flame blocking plate 132 is formed with a communicating portion 133 through which the outlet port 115 and the flame protecting tube 130 are communicated with each other.
  • the exhaust gas flowing tube 120 is provided with an exhaust gas blocking plate 122 disposed at an end thereof.
  • the outlet port 115 is disposed to be corresponding to a position of the flame protecting tube 130 so that the vent pipe 400 connected with the inlet port 111 and the vent pipe 400 connected with outlet port 115 are stepped with respect to each other.
  • an aftertreating device of exhaust gas for reducing exhaust gas generated from a diesel engine 200 including a burner 100 which is formed at an exhaust gas flowing tube 120 so as to increase a temperature of the exhaust gas generated from the diesel engine 200; and a diesel particulate filter 300 which is formed at a rear end of the burner 100 so as to burn organic materials and particulate matters in the exhaust gas.
  • the burner and the aftertreating device of exhaust gas of the present invention stably forms flame, increases a mixing degree of exhaust gas and flame so as to uniformly increase a temperature of the exhaust gas, and also increases combustion efficiency of a diesel particulate filter so as to efficiently reduce the exhaust gas.
  • the flame is protected by a flame protecting tube, and the exhaust gas and the flame are mixed to each other in a length direction, thereby uniformly increasing the temperature of the exhaust gas without increasing the back pressure.
  • Fig. 1 is a perspective view of a burner for an aftertreating device of exhaust gas in accordance with an embodiment of the present invention.
  • Fig. 2 is an exploded perspective view of the burner in accordance with an embodiment of the present invention.
  • Fig. 3 is a cross-sectional view taken along a line A-A’ of Fig. 1.
  • Fig. 4 is a cross-sectional view taken along a line B-B’ of Fig. 1.
  • Fig. 5 is a cross-sectional view of an aftertreating device of exhaust gas in accordance with an embodiment of the present invention.
  • Fig. 6 is a schematic view of the aftertreating device of exhaust gas in accordance with an embodiment of the present invention.
  • inlet port 112 flame forming part
  • Fig. 1 is a perspective view of a burner for aftertreating device of exhaust gas in accordance with an embodiment of the present invention
  • Fig. 2 is an exploded perspective view of the burner in accordance with an embodiment of the present invention
  • Fig. 3 is a cross-sectional view taken along a line A-A’ of Fig. 1
  • Fig. 4 is a cross-sectional view taken along a line B-B’ of Fig. 1.
  • a burner 100 for aftertreating 1000 device of exhaust gas in accordance with the present invention includes a combustion chamber 110, an exhaust gas flowing tube 120 and a flame protecting tube 130.
  • the combustion chamber 110 as a basic body forming a burner 100 is formed at a vent pipe 400.
  • an inlet port 111 which is connected with the vent pipe 400 so as to receive exhaust gas and a flame forming part 112 for forming flame are formed at one side thereof, and an outlet port 115 which is connected with the vent pipe 400 so as to discharge heated exhaust gas.
  • both sides of the combustion chamber 110 are connected with the vent pipe 400 so as to form a space in which the exhaust gas is flowed.
  • the combustion chamber 110 includes the flame forming part 112 which has a nozzle 113 and an ignition means 114 so as to form the flame in the combustion chamber 110.
  • the nozzle 113 is a means for injecting fuel, and if necessary, the means may inject air along with the fuel.
  • the inlet port 111 and the flame forming part 112 are formed at one side of the combustion chamber 110 so as to be communicated with the exhaust gas flowing tube 120 and the flame protecting tube 130, respectively.
  • the inlet port 111 and the exhaust gas flowing tube 120 are formed at upper sides of the flame forming part 112 and the flame protecting tube 130, but the present invention is not limited to the embodiment. That is, if the exhaust gas flowing tube 120 and the flame protecting tube 130 can be disposed to be parallel with each other, the present invention may have various constructions. For example, positions of the exhaust gas flowing tube 120 and the flame protecting tube 130 are may be reversed, or the exhaust gas flowing tube 120 and the flame protecting tube 130 may be disposed horizontally.
  • the exhaust gas flowing tube 120 and the flame protecting tube 130 are positioned in the combustion chamber 110.
  • the exhaust gas flowing tube 120 is communicated with the inlet port 111, and a plurality of first hollow portions 121 are formed at an outer surface of the exhaust gas flowing tube 120 so that the exhaust gas may be leaked from an inside to an outside thereof (herein, the “outside” means an outer space of the exhaust gas flowing tube 120 in the combustion chamber 110).
  • the flame protecting tube 130 is communicated with the flame forming part 112 so as to protect the flame generated through the flame forming part 112, and like the plurality of first hollow portions 121 of the exhaust gas flowing tube 120, a plurality of second hollow portions 131 are formed at the flame protecting tube 130 so that the flame may be leaked to an outside thereof.
  • the first hollow portions 121 of the exhaust gas flowing tube 120 and the second hollow portions 131 of the flame protecting tube 130 are formed at different positions from each other in a length direction of the combustion chamber 110.
  • An aftertreating 1000 device of exhaust gas has an advantage of increasing exhaust gas reduction efficiency by using the burner 100 as described above.
  • the first and second hollow portions 121 and 131 may be formed into various shapes. As shown in Fig. 1 to 3, preferably, the first hollow portions 121 of the exhaust gas flowing tube 120 are formed to be adjacent to the inlet port 111, and the second hollow portions 131 of the flame protecting tube 130 is formed to be adjacent to the outlet port 115.
  • the exhaust gas flowing in the vent port 400 is introduced into the exhaust gas flowing tube 120 and then uniformly spread through the first hollow portions 121 into the combustion chamber 110.
  • the burner for the aftertreating device of exhaust gas has an advantage of properly increasing the temperature of the exhaust gas.
  • the nozzle 113 is protected by the flame protecting tube 130 so as to prevent the nozzle 113 from being clogged by the particulate matters, and thus it is possible to smoothly form the flame after that.
  • One of the flame protecting tube 130 may be opened, and a flame blocking plate 132 is provided to protect the outlet port 115 and the vent pipe 400 from the flame and also to guide the flame to the combustion chamber 110 so that the flame uniformly heats the exhaust gas in the combustion chamber 110.
  • Fig . 2 is a cross-sectional view taken along a line B-B’ of Fig. 1, wherein Figs. 2A and 2B shows different flame blocking plates 132 from each other.
  • the flame blocking plate 132 of Fig. 2A is formed with a communicating portion 133 through which the outlet port 115 and the flame protecting tube 130 are communicated with each other.
  • a plurality of supporting members for supporting the flame blocking plate 132 are formed around the flame blocking plate 132, and the communicating portion 133 is provided in plural.
  • the flame blocking plate 132 having the communicating portion 133 functions to closes only part of a region of an end of the flame protecting tube 130, and the rest part is communicated with the outlet port 115.
  • the flame blocking plate 132 of Fig. 2B does not have the communicating portion 133, but vertically blocks the flame protecting tube 130 so as to close the end of the flame protecting tube 130.
  • the present invention is not limited to these embodiments, and the flame blocking plate 132 may be formed into various shaped.
  • an exhaust gas blocking plate 122 may be also provided at an end of the exhaust gas flowing tube 120.
  • the exhaust gas blocking plate 122 may be formed to vertically block the end of the exhaust gas flowing tube 120, or may be formed so that part of a region thereof communicated with the outlet port 115.
  • the aftertreating 1000 device of exhaust gas may have individually the flame blocking plate 132 or the exhaust gas blocking plate 122, or may have both of them. In case of the latter, one of the flame blocking plate 132 and the exhaust gas blocking plate 122 is formed to be communicated with the outlet port 115, so that the exhaust gas is smoothly flowed to the outside.
  • the outlet port 115 is formed at the other side of the combustion chamber 110 so that all of the exhaust gas from the other side of the combustion chamber 110 is discharged.
  • the outlet port 115 is formed to be corresponding to a position of the exhaust gas flowing tube 120 except a part of the region which is adjacent to the combustion chamber 110 in order to accommodate the end of the combustion chamber 110, such that the vent pipe 400 connected with the inlet port 111 and the vent pipe 400 connected with the outlet port 115 are formed to be stepped with respect to each other.
  • the vent pipe 400 (connected with the inlet port 111) before being connected with the combustion chamber 110 is placed at an upper position than the vent pipe 400 (connected with the outlet port 115) after being passed through the combustion chamber 110 so as to be stepped with respect to each other. Therefore, the flowing exhaust gas is heated even at the flame blocking plate 132, thereby further increasing the heating efficiency.
  • Fig. 5 shows an example that the vent pipe 400 before being connected with the combustion chamber 110 is placed at a lower position than the vent pipe 400 after being passed through the combustion chamber 110 so as to be stepped with respect to each other. If the exhaust gas flowing tube 120 and the flame protecting tube 130 can be disposed to be parallel with each other, any constructions can be accepted.
  • the stepped structure means a stepped state in a longitudinal direction as well as a stepped state in a transverse direction.
  • Fig. 6 is a schematic view of the aftertreating 1000 device of exhaust gas in accordance with an embodiment of the present invention.
  • the aftertreating 1000 device of exhaust gas for reducing the emissions of exhaust gas generated from a diesel engine 200 is characterized by including a burner 100 which is formed at the exhaust gas flowing tube 120 so as to increase the temperature of the exhaust gas generated from the diesel engine 200; and a diesel particulate filter 300 which is formed at a rear end of the burner 100 so as to burn organic materials and particulate matters in the exhaust gas.
  • the aftertreating 1000 device of exhaust gas uses the burner 100 which increases a mixing degree of the exhaust gas and the flame and increases the temperature of the exhaust gas, thereby increasing the combustion efficiency of the diesel particulate filter 300 and also entirely reducing the emissions of exhaust gas.

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

Abstract

Provided is a burner and an aftertreating device of exhaust gas, and more particularly, to a burner and an aftertreating device of exhaust gas, which increases a mixing degree of exhaust gas and flame so as to properly increase a temperature of the exhaust gas, and also enhances combustion efficiency of a diesel particulate filter, thereby efficiently reducing the emissions of exhaust gas.

Description

BURNER AND AFTERTREATING DEVICE OF EXHAUST GAS
The present invention relates to a burner and an aftertreating device of exhaust gas, and more particularly, to a burner and an aftertreating device of exhaust gas, which increases a mixing degree of exhaust gas and flame so as to properly increase a temperature of the exhaust gas, and also enhances combustion efficiency of a diesel particulate filter, thereby efficiently reducing the emissions of exhaust gas.
In general, a diesel engine is widely used in a vehicle, a construction machine, a ship and the like, because of its higher power and lower fuel cost than a gasoline engine.
However, the diesel engine is four-stroke engine in which fuel is injected into an engine and then burnt by the compression ignition method, and incomplete combustion occurs in a self-ignition process of the fuel due to non-uniformity of fuel-air mixture, and thus noxious particles (exhaust gas) are generated.
Particularly, the noxious particles mainly contain NOx, particulate matter and soot. There is a report that the noxious particles generated from the diesel engine form 40% of air pollution. Therefore, the exhaust gas is strictly controlled in many countries. In order to satisfy such restriction, there has been proposed an aftertreating device of exhaust gas which is disposed at a vent pipe so as to reduce the exhaust gas.
In most of the aftertreating device of exhaust gas, the exhaust gas generated in the diesel engine is flowed into a filter having a catalyst so as be burnt in the filter, thereby reducing the emissions of exhaust gas discharged into the air.
However, if the exhaust gas is simply flowed into the filter, a rate of combustion is very low. Thus, there has been also proposed a new technology which increases a temperature of the exhaust gas before the exhaust gas is flowed into the filter, thereby increasing the rate of combustion.
In Korean Patent Application No.10-1997-007901 (entitled: a burner for an exhaust gas purification device) and Korean Patent No.0548451 (an inner flame burner for regeneration of diesel particulate filter), the temperature of the exhaust gas is increased by the burner so as to increase the rate of combustion.
In such technologies, it is possible to increase the temperature of the exhaust gas by using the burner, but there is a problem that occur difference in degree of heating according to the regions.
In other words, entire exhaust gas just before flow into the filter is not uniformly heated, a part of the exhaust gas is largely increased and other parts are not heated properly, and thus the rate of combustion is not enhanced as much as expected.
Therefore, in order to increase a mixing rate of exhaust gas and flame and uniformly increase the temperature of the exhaust gas, there has been proposed a burner for an aftertreating device of exhaust gas, which has a mixing means such as a baffle and a perforated plate so as to control flow of exhaust gas or flame in a combustion chamber.
However, since the mixing means is disposed in a space that the flame is formed, back pressure may be increased. If the back pressure is increased, power is reduced and thus driving comfort is deteriorated.
Further, since the mixing means may be a factor of disturbing the forming of the flame, in case of the incomplete combustion in the burner, the noxious particles (exhaust gas) may be further generated, thereby reducing the emissions of exhaust gas reduction efficiency.
An object of the present invention is to provide a burner and an aftertreating device of exhaust gas, which stably forms flame, increases a mixing degree of exhaust gas and flame so as to uniformly increase a temperature of the exhaust gas, and also increases combustion efficiency of a diesel particulate filter so as to efficiently reduce the exhaust gas.
To achieve the object of the present invention, the present invention provides a burner 100 including a combustion chamber 110 in which a flame forming part 112 is formed at one side, and an outlet port 115 that is connected with a vent pipe 400 so as to discharge exhaust gas is formed at the other side, the flame forming part 112 including an inlet port 111 connected with the vent pipe 400 so as to introduce the exhaust gas, a nozzle 113 for injecting fuel and forming flame and an ignition means; an exhaust gas flowing tube 120 which is formed in the combustion chamber 110 so as to be communicated with the inlet port 111 so that the exhaust gas is flowed therethrough, and in which a plurality of first hollow portions 121 are formed at an outer surface so as to leak the exhaust gas; and a flame protecting tube 130 which is formed in the combustion chamber 110 so as to be communicated with the flame forming part 112, and in which a plurality of second hollow portions 131 are formed at an outer surface so as to leak the flame, wherein the exhaust gas flowing tube 120 and the flame protecting tube 130 are disposed to be parallel with each other, and the first hollow portions 121 and the second hollow portions 131 are formed at different positions from each other in a length direction.
Preferably, the first hollow portions 121 of the exhaust gas flowing tube 120 are formed to be adjacent to the inlet port 111, and the second hollow portions 131 of the flame protecting tube 130 are formed to be adjacent to the outlet port 115.
Preferably, the flame protecting tube 130 is provided with a flame blocking plate 132 disposed at an end thereof.
Preferably, the flame blocking plate 132 vertically blocks the flame protecting tube 130 so as to close the end of the flame protecting tube 130.
Preferably, the flame blocking plate 132 is formed with a communicating portion 133 through which the outlet port 115 and the flame protecting tube 130 are communicated with each other.
Preferably, the exhaust gas flowing tube 120 is provided with an exhaust gas blocking plate 122 disposed at an end thereof.
Preferably, the outlet port 115 is disposed to be corresponding to a position of the flame protecting tube 130 so that the vent pipe 400 connected with the inlet port 111 and the vent pipe 400 connected with outlet port 115 are stepped with respect to each other.
Further, the present invention provides An aftertreating device of exhaust gas for reducing exhaust gas generated from a diesel engine 200, including a burner 100 which is formed at an exhaust gas flowing tube 120 so as to increase a temperature of the exhaust gas generated from the diesel engine 200; and a diesel particulate filter 300 which is formed at a rear end of the burner 100 so as to burn organic materials and particulate matters in the exhaust gas.
The burner and the aftertreating device of exhaust gas of the present invention stably forms flame, increases a mixing degree of exhaust gas and flame so as to uniformly increase a temperature of the exhaust gas, and also increases combustion efficiency of a diesel particulate filter so as to efficiently reduce the exhaust gas.
Further, in the burner and the aftertreating device of exhaust gas of the present invention, the flame is protected by a flame protecting tube, and the exhaust gas and the flame are mixed to each other in a length direction, thereby uniformly increasing the temperature of the exhaust gas without increasing the back pressure.
The above and other objects, features and advantages of the present invention will become apparent from the following description of preferred embodiments given in conjunction with the accompanying drawings, in which:
Fig. 1 is a perspective view of a burner for an aftertreating device of exhaust gas in accordance with an embodiment of the present invention.
Fig. 2 is an exploded perspective view of the burner in accordance with an embodiment of the present invention.
Fig. 3 is a cross-sectional view taken along a line A-A’ of Fig. 1.
Fig. 4 is a cross-sectional view taken along a line B-B’ of Fig. 1.
Fig. 5 is a cross-sectional view of an aftertreating device of exhaust gas in accordance with an embodiment of the present invention.
Fig. 6 is a schematic view of the aftertreating device of exhaust gas in accordance with an embodiment of the present invention.

[Detailed Description of Main Elements]
1000: aftertreating device of exhaust gas
100: burner 110: combustion chamber
111: inlet port 112: flame forming part
113: nozzle 114: ignition means
115: outlet port
120: exhaust gas flowing tube 121: first hollow portion
122: exhaust gas blocking plate
130: flame protecting tube 131: second hollow portion
132: flame blocking plate 133: communicating portion
200: diesel engine 300: diesel particulate filter
400: vent pipe
Hereinafter, the embodiments of the present invention will be described in detail with reference to accompanying drawings.
Fig. 1 is a perspective view of a burner for aftertreating device of exhaust gas in accordance with an embodiment of the present invention, Fig. 2 is an exploded perspective view of the burner in accordance with an embodiment of the present invention, Fig. 3 is a cross-sectional view taken along a line A-A’ of Fig. 1, and Fig. 4 is a cross-sectional view taken along a line B-B’ of Fig. 1.

A burner 100 for aftertreating 1000 device of exhaust gas in accordance with the present invention includes a combustion chamber 110, an exhaust gas flowing tube 120 and a flame protecting tube 130.
The combustion chamber 110 as a basic body forming a burner 100 is formed at a vent pipe 400. In detail, an inlet port 111 which is connected with the vent pipe 400 so as to receive exhaust gas and a flame forming part 112 for forming flame are formed at one side thereof, and an outlet port 115 which is connected with the vent pipe 400 so as to discharge heated exhaust gas.
In other words, both sides of the combustion chamber 110 are connected with the vent pipe 400 so as to form a space in which the exhaust gas is flowed. The combustion chamber 110 includes the flame forming part 112 which has a nozzle 113 and an ignition means 114 so as to form the flame in the combustion chamber 110.
The nozzle 113 is a means for injecting fuel, and if necessary, the means may inject air along with the fuel.
The inlet port 111 and the flame forming part 112 are formed at one side of the combustion chamber 110 so as to be communicated with the exhaust gas flowing tube 120 and the flame protecting tube 130, respectively.
In the drawings, the inlet port 111 and the exhaust gas flowing tube 120 are formed at upper sides of the flame forming part 112 and the flame protecting tube 130, but the present invention is not limited to the embodiment. That is, if the exhaust gas flowing tube 120 and the flame protecting tube 130 can be disposed to be parallel with each other, the present invention may have various constructions. For example, positions of the exhaust gas flowing tube 120 and the flame protecting tube 130 are may be reversed, or the exhaust gas flowing tube 120 and the flame protecting tube 130 may be disposed horizontally.
The exhaust gas flowing tube 120 and the flame protecting tube 130 are positioned in the combustion chamber 110. The exhaust gas flowing tube 120 is communicated with the inlet port 111, and a plurality of first hollow portions 121 are formed at an outer surface of the exhaust gas flowing tube 120 so that the exhaust gas may be leaked from an inside to an outside thereof (herein, the “outside” means an outer space of the exhaust gas flowing tube 120 in the combustion chamber 110).
The flame protecting tube 130 is communicated with the flame forming part 112 so as to protect the flame generated through the flame forming part 112, and like the plurality of first hollow portions 121 of the exhaust gas flowing tube 120, a plurality of second hollow portions 131 are formed at the flame protecting tube 130 so that the flame may be leaked to an outside thereof.
In the burner of the present invention, the first hollow portions 121 of the exhaust gas flowing tube 120 and the second hollow portions 131 of the flame protecting tube 130 are formed at different positions from each other in a length direction of the combustion chamber 110.
Therefore, the exhaust gas and the flame are uniformly mixed so as to entirely increase a temperature of the exhaust gas, thereby increasing heating efficiency of the burner 100. An aftertreating 1000 device of exhaust gas has an advantage of increasing exhaust gas reduction efficiency by using the burner 100 as described above.
The first and second hollow portions 121 and 131 may be formed into various shapes. As shown in Fig. 1 to 3, preferably, the first hollow portions 121 of the exhaust gas flowing tube 120 are formed to be adjacent to the inlet port 111, and the second hollow portions 131 of the flame protecting tube 130 is formed to be adjacent to the outlet port 115.
In case that the first hollow portions 121 of the exhaust gas flowing tube 120 are formed to be adjacent to the inlet port 111, the exhaust gas flowing in the vent port 400 is introduced into the exhaust gas flowing tube 120 and then uniformly spread through the first hollow portions 121 into the combustion chamber 110.
Further, in case that the second hollow portions 131 of the flame protecting tube 130 is formed to be adjacent to the outlet port 115, it is possible to prevent possibility of incomplete combustion which may be generated when the exhaust gas is directly supplied to the flame forming part 112, thereby allowing the flame to be leaked at a rear side thereof, while stably forming the flame. Therefore, the burner for the aftertreating device of exhaust gas has an advantage of properly increasing the temperature of the exhaust gas.
In addition, when the burner 100 is not operated, the nozzle 113 is protected by the flame protecting tube 130 so as to prevent the nozzle 113 from being clogged by the particulate matters, and thus it is possible to smoothly form the flame after that.
One of the flame protecting tube 130 may be opened, and a flame blocking plate 132 is provided to protect the outlet port 115 and the vent pipe 400 from the flame and also to guide the flame to the combustion chamber 110 so that the flame uniformly heats the exhaust gas in the combustion chamber 110.
Fig . 2 is a cross-sectional view taken along a line B-B’ of Fig. 1, wherein Figs. 2A and 2B shows different flame blocking plates 132 from each other.
The flame blocking plate 132 of Fig. 2A is formed with a communicating portion 133 through which the outlet port 115 and the flame protecting tube 130 are communicated with each other. A plurality of supporting members for supporting the flame blocking plate 132 are formed around the flame blocking plate 132, and the communicating portion 133 is provided in plural.
In other words, the flame blocking plate 132 having the communicating portion 133 functions to closes only part of a region of an end of the flame protecting tube 130, and the rest part is communicated with the outlet port 115.
The flame blocking plate 132 of Fig. 2B does not have the communicating portion 133, but vertically blocks the flame protecting tube 130 so as to close the end of the flame protecting tube 130.
However, the present invention is not limited to these embodiments, and the flame blocking plate 132 may be formed into various shaped.
Furthermore, in the aftertreating device of exhaust gas of the present invention, as shown in Fig. 5, an exhaust gas blocking plate 122 may be also provided at an end of the exhaust gas flowing tube 120.
The exhaust gas blocking plate 122 may be formed to vertically block the end of the exhaust gas flowing tube 120, or may be formed so that part of a region thereof communicated with the outlet port 115.
The aftertreating 1000 device of exhaust gas may have individually the flame blocking plate 132 or the exhaust gas blocking plate 122, or may have both of them. In case of the latter, one of the flame blocking plate 132 and the exhaust gas blocking plate 122 is formed to be communicated with the outlet port 115, so that the exhaust gas is smoothly flowed to the outside.
The outlet port 115 is formed at the other side of the combustion chamber 110 so that all of the exhaust gas from the other side of the combustion chamber 110 is discharged.
Preferably, the outlet port 115 is formed to be corresponding to a position of the exhaust gas flowing tube 120 except a part of the region which is adjacent to the combustion chamber 110 in order to accommodate the end of the combustion chamber 110, such that the vent pipe 400 connected with the inlet port 111 and the vent pipe 400 connected with the outlet port 115 are formed to be stepped with respect to each other.
Referring to the drawings except Fig. 5, in the burner for the aftertreating device of exhaust gas, the vent pipe 400 (connected with the inlet port 111) before being connected with the combustion chamber 110 is placed at an upper position than the vent pipe 400 (connected with the outlet port 115) after being passed through the combustion chamber 110 so as to be stepped with respect to each other. Therefore, the flowing exhaust gas is heated even at the flame blocking plate 132, thereby further increasing the heating efficiency.
Fig. 5 shows an example that the vent pipe 400 before being connected with the combustion chamber 110 is placed at a lower position than the vent pipe 400 after being passed through the combustion chamber 110 so as to be stepped with respect to each other. If the exhaust gas flowing tube 120 and the flame protecting tube 130 can be disposed to be parallel with each other, any constructions can be accepted.
Further, the stepped structure means a stepped state in a longitudinal direction as well as a stepped state in a transverse direction.
Fig. 6 is a schematic view of the aftertreating 1000 device of exhaust gas in accordance with an embodiment of the present invention. The aftertreating 1000 device of exhaust gas for reducing the emissions of exhaust gas generated from a diesel engine 200 is characterized by including a burner 100 which is formed at the exhaust gas flowing tube 120 so as to increase the temperature of the exhaust gas generated from the diesel engine 200; and a diesel particulate filter 300 which is formed at a rear end of the burner 100 so as to burn organic materials and particulate matters in the exhaust gas.
The present application contains subject matter related to Korean Patent Application No. 2009-0046752, filed in the Korean Intellectual Property Office on May 28, 2009, the entire contents of which is incorporated herein by reference.
While the present invention has been described with respect to the specific embodiments, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Since the aftertreating 1000 device of exhaust gas uses the burner 100 which increases a mixing degree of the exhaust gas and the flame and increases the temperature of the exhaust gas, thereby increasing the combustion efficiency of the diesel particulate filter 300 and also entirely reducing the emissions of exhaust gas.

Claims (8)

  1. A burner 100, comprising:a combustion chamber 110 in which a flame forming part 112 is formed at one side, and an outlet port 115 that is connected with a vent pipe 400 so as to discharge exhaust gas is formed at the other side, the flame forming part 112 comprising an inlet port 111 connected with the vent pipe 400 so as to introduce the exhaust gas, a nozzle 113 for injecting fuel and forming flame and an ignition means 114;an exhaust gas flowing tube 120 which is formed in the combustion chamber 110 so as to be communicated with the inlet port 111 so that the exhaust gas is flowed therethrough, and in which a plurality of first hollow portions 121 are formed at an outer surface so as to leak the exhaust gas; and a flame protecting tube 130 which is formed in the combustion chamber 110 so as to be communicated with the flame forming part 112, and in which a plurality of second hollow portions 131 are formed at an outer surface so as to leak the flame, wherein the exhaust gas flowing tube 120 and the flame protecting tube 130 are disposed to be parallel with each other, and the first hollow portions 121 and the second hollow portions 131 are formed at different positions from each other in a length direction.
  2. The burner of claim 1, wherein the first hollow portions 121 of the exhaust gas flowing tube 120 are formed to be adjacent to the inlet port 111, and the second hollow portions 131 of the flame protecting tube 130 are formed to be adjacent to the outlet port 115.
  3. The burner of claim 1, wherein the flame protecting tube 130 is provided with a flame blocking plate 132 disposed at an end thereof.
  4. The burner of claim 3, wherein the flame blocking plate 132 vertically blocks the flame protecting tube 130 so as to close the end of the flame protecting tube 130.
  5. The burner of claim 3, wherein the flame blocking plate 132 is formed with a communicating portion 133 through which the outlet port 115 and the flame protecting tube 130 are communicated with each other.
  6. The burner of claim 3, wherein the exhaust gas flowing tube 120 is provided with an exhaust gas blocking plate 122 disposed at an end thereof.
  7. The burner of claim 1, wherein the outlet port 115 is disposed to be corresponding to a position of the flame protecting tube 130 so that the vent pipe 400 connected with the inlet port 111 and the vent pipe 400 connected with outlet port 115 are stepped with respect to each other.
  8. An aftertreating device of exhaust gas for reducing exhaust gas generated from a diesel engine 200, comprising:a burner 100 according to any one of claims 1 to 7, which is formed at an exhaust gas flowing tube 120 so as to increase a temperature of the exhaust gas generated from the diesel engine 200; and a diesel particulate filter 300 which is formed at a rear end of the burner 100 so as to burn organic materials and particulate matters in the exhaust gas.
PCT/KR2010/003238 2009-05-28 2010-05-24 Burner and aftertreating device of exhaust gas WO2010137829A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090046752A KR101533243B1 (en) 2009-05-28 2009-05-28 Burner and aftertreating device of exhaust gas
KR10-2009-0046752 2009-05-28

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WO2010137829A2 true WO2010137829A2 (en) 2010-12-02
WO2010137829A3 WO2010137829A3 (en) 2011-03-24

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DE102019121319A1 (en) * 2018-08-21 2020-02-27 Tenneco Automotive Operating Company Inc. Exhaust gas burner assembly

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KR101346194B1 (en) * 2011-08-19 2014-01-06 송일환 Bunner for dpf apparatus

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KR19980072893A (en) * 1997-03-10 1998-11-05 김욱한 Exhaust gas purifier combustor
KR19990061845A (en) * 1997-12-31 1999-07-26 정몽규 Vehicle Exhaust System
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KR100548451B1 (en) * 2005-07-22 2006-01-31 한국기계연구원 Inner flame burner for regeneration of diesel particulate filter

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019121319A1 (en) * 2018-08-21 2020-02-27 Tenneco Automotive Operating Company Inc. Exhaust gas burner assembly
DE102019121319B4 (en) 2018-08-21 2020-08-06 Tenneco Automotive Operating Company Inc. Exhaust burner arrangement

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WO2010137829A3 (en) 2011-03-24
KR20100128384A (en) 2010-12-08

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