CN103527297B - A kind of automobile exhaust thermal reaction purification device - Google Patents

A kind of automobile exhaust thermal reaction purification device Download PDF

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Publication number
CN103527297B
CN103527297B CN201310362604.6A CN201310362604A CN103527297B CN 103527297 B CN103527297 B CN 103527297B CN 201310362604 A CN201310362604 A CN 201310362604A CN 103527297 B CN103527297 B CN 103527297B
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China
Prior art keywords
level sleeve
sleeve
purification device
level
thermal reaction
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CN201310362604.6A
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CN103527297A (en
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许铭
刘向阳
白弘基
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Zhejiang Geely Holding Group Co Ltd
Hunan Geely Automobile Parts Co Ltd
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Zhejiang Geely Holding Group Co Ltd
Hunan Geely Automobile Parts Co Ltd
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Abstract

The invention discloses a kind of can effective cleaning of off-gas and greatly reduce the automobile exhaust thermal reaction purification device of displacement noise, the exhaust gas processing device overcoming existing technology can not realize the deficiency of potent purification and noise processed limited efficiency to tail gas.Described a kind of automobile exhaust thermal reaction purification device, comprise shell, described shell two ends are respectively equipped with suction tude, tailpipe, the catalyzer for partial combustion thing reaction in catalytic exhaust is established in described shell, one-level sleeve is provided with in described shell, described suction tude is communicated with the outer end of one-level sleeve, two-level sleeve is provided with outside described one-level sleeve, described one-level sleeve with all form the gas exhaust piping be communicated with between two-level sleeve, between two-level sleeve with outer casing inner wall, described one-level sleeve, the opening direction of two-level sleeve are contrary.The present invention be applicable to exhaust gas cleaner in the past the occasion that is suitable for, have tail gas can fully purification, the advantages such as the noise of each frequency can be cut down comprehensively.

Description

A kind of automobile exhaust thermal reaction purification device
Technical field
The invention belongs to automobile exhaust gas purifying installation field, particularly relate to a kind of automobile exhaust thermal reaction purification device.
Background technique
Usually can contain the material such as many hydrocarbons, CO, NO in vehicle exhaust, and there is no small displacement noise.In order to control the tail gas environmental pollution of automobile, some vent gas treatment means can be taked.But the vent gas treatment of prior art, purifying effect is Shortcomings also, still can the not low partial combustion material such as hydrocarbon, CO, NO of residual content in tail gas, noise when existing noise elimination noise reduction structure well can not eliminate exhaust emissions in addition.
China Patent Publication No. CN102322315A, publication date on January 18th, 2012, the name of invention is called a kind of exhaust purging muffler, this application case discloses a kind of exhaust purging muffler, it comprises and has suction port, the noise elimination housing of air outlet, and the suction tude to communicate with noise elimination enclosure interior, noise elimination pipeline is provided with in described noise elimination housing, described noise elimination spiral pipeline be arranged in noise elimination housing, one end of noise elimination pipeline is passed noise elimination shell air inlet and stretches in suction tude, the other end stretches out noise elimination housing through noise elimination housing air outlet, purification plant is provided with in described suction tude.This invention deficiency is, not good to the treatment effect of tail gas, the partial combustion material still containing higher proportion in tail gas, and noise reduction mode narrow limitation is large, limited efficiency.
Summary of the invention
The exhaust gas processing device that instant invention overcomes existing technology can not realize the deficiency of potent purification and noise processed limited efficiency to tail gas, provide a kind of can effective cleaning of off-gas and greatly reduce the automobile exhaust thermal reaction purification device of displacement noise.
The present invention is achieved by the following technical solutions:
A kind of automobile exhaust thermal reaction purification device, comprise shell, described shell two ends are respectively equipped with suction tude, tailpipe, the catalyzer for partial combustion thing reaction in catalytic exhaust is established in described shell, one-level sleeve is provided with in described shell, described suction tude is communicated with the outer end of one-level sleeve, two-level sleeve is provided with outside described one-level sleeve, described one-level sleeve with all form the gas exhaust piping be communicated with between two-level sleeve, between two-level sleeve with outer casing inner wall, described one-level sleeve, the opening direction of two-level sleeve are contrary.Tail gas is discharged along gas exhaust piping, owing to there is one-level sleeve, two-level sleeve, therefore the discharge course of tail gas is commute until discharge, so just increase the RT of tail gas in gas exhaust piping, extend the reaction time, assisting simultaneously by the catalyzer such as platinum, rhodium, can improve reactive rate, reduces the ratio of partial combustion material in tail gas.Tail gas reaction needs to carry out at a certain temperature, and in routine techniques, lower apart from suction tude temperature far away, be unfavorable for that tail gas clean-up reacts, tail gas pipeline in this programme belongs to back and forth sheathed form, the outer side wall of internal layer pipeline is just in the madial wall of outer pipeline, the heat of one-level sleeve inner exhaust gas can pass to the tail gas in two-level sleeve by sidewall, the heat of two-level sleeve inner exhaust gas can pass to the tail gas in shell by sidewall, thus, the exhaust temperature of all positions all can not be too low, can ensure that tail gas clean-up reaction is efficient, carry out smoothly, fully play the effect of tail gas clean-up.Moreover, exhaust emissions route is a reciprocating path, therefore, tail gas noise sound wave can run into each layer and block and multiple reflections, these retardances place comprise the place such as closed end, the closed end of shell near suction tude side of two-level sleeve, and the sound wave of reflection and the sound wave in exhaust emissions direction liquidate mutually, interfere, reduce acoustic energy, thus effectively reach the object of noise elimination.
As preferably, described one-level sleeve inner end is provided with a perforated section, and described perforated section is provided with some sound attenuation holes.The existence of sound attenuation hole, increases the viscous resistance to sound wave and surface friction drag, makes sound wave in propagation process, lose a part of acoustic energy.
As preferably, described two-level sleeve sidewall is provided with reflecting curtain, and described reflecting curtain is between one-level sleeve inner end and two-level sleeve closed end.By reflecting curtain, undergoing mutation in the cross section making tail gas propagate pipeline, causes acoustic impedance to change, make a part along the acoustic reflection echogenicity of pipe transmmision, play the effect of noise elimination, and one-level sleeve inner end is the most anxious place of exhaust gas flow, arrange reflecting plate at this place, reflecting effect is also the strongest.And low-frequency noise can be eliminated preferably by modes such as reflections.
As preferably, described one-level sleeve outer side wall, two-level sleeve madial wall are provided with some microperforated panels, and the microperforated panel on one-level sleeve, the microperforated panel on two-level sleeve intert arrangement successively and form local eddy currents chamber.When sound wave is delivered on microperforated panel, because microperforated panel inside has hole structure, not density equalization, therefore can there is relative movement in microperforated panel internal structure, a part of acoustic energy is scattered and disappeared, plays the effect of noise elimination, and the frequency range of microperforated panel abatement sound wave is also wider.And sound wave reaches after in local eddy currents chamber, roundtrip, refraction, form the sound wave congregation zone of similar eddy current, and at this place, liquidate the mutually dynamics of abatement of sound wave is very large, effectively can play the effect of noise elimination noise reduction.Tail gas then forms local eddy currents in local eddy currents chamber, the time of improving non-complete reaction gas degrees of fusion and temporarily retaining, makes purification more thorough.
As preferably, interference plate is provided with between described tailpipe and the closed end of two-level sleeve, described interference plate is provided with some through holes, and described interference plate radius is greater than the radius of two-level sleeve closed end, and described interference plate is arranged on the bottom surface of two-level sleeve closed end by connecting rod.Be about to the position of discharging housing at tail gas, interference plate be set, interference plate has through hole, can not impact the normal discharge of tail gas, but certain acoustic interference effects can be caused again simultaneously, reduce exhaust sound further.
As preferably, described two-level sleeve is provided with some resonant cavities be communicated with two-level sleeve, and described resonant cavity is in " convex " font, and described resonant cavity is in outside two-level sleeve.When sound wave incident is to the opening of resonant cavity, because the sudden change of acoustic impedance, part acoustic energy will reflect back, and simultaneously under the effect of sound wave, the air column in resonant cavity produces vibration, during vibrations, frictional damping makes again a part of acoustic energy change thermal dissipation into, only have small part radiating acoustic energy to go out, and these heat energy one of can ensure as temperature during reaction, so, both played soundproof effect, and tail gas clean-up reaction temperature can be maintained again.
As preferably, between described shell and two-level sleeve, be provided with some sudden change blocks.By sudden change baffle plate, make the pipeline of sound wave through different cross section of rectilinear propagation, wherein a part of acoustic reflection forms reflected wave, creates the phase difference of 180 degree, mutually interferes, can reach the effect of noise elimination between reflected wave and original sound wave.
As preferably, in described one-level sleeve lateral wall, be provided with heat-conducting layer in two-level sleeve sidewall, in described one-level sleeve lateral wall, two-level sleeve sidewall is provided with some openings, and the heat-conducting layer part being in opening contacts with the tail gas in gas exhaust piping.The heat of internal layer high-temperature tail gas can be passed to the lower tail gas of outer relative temperature by heat-conducting layer better, and the reaction temperature maintaining tail gas everywhere is all in reasonable region, ensures the persistency of tail gas clean-up reaction.
As preferably, described heat-conducting layer is made up of platinum or platinum alloy.Platinum or platinum alloy had both had the good capacity of heat transmission, were again the good catalyst of tail gas clean-up reaction, so can ensure that in gas exhaust piping, temperature is all not less than reaction temperature, can improve reaction efficiency again everywhere.
Therefore, the invention has the beneficial effects as follows: in (1) gas exhaust piping, reaction temperature all can not be too low everywhere, ensure tail gas energy fully purification; (2) there is multiple noise-reducing structure, comprehensively the noise of each frequency of abatement; (3) degrees of fusion of non-complete reaction gas is high, and purification is thorough.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is that in one-level sleeve of the present invention, heat-conducting layer wherein the local of a section puts figure;
Fig. 3 is the partial enlarged drawing of resonant cavity of the present invention.
In figure: shell 1, suction tude 2, tailpipe 3, one-level sleeve 4, two-level sleeve 5, perforated section 6, reflecting curtain 7, microperforated panel 8, interference plate 9, resonant cavity 10, sudden change block 11, heat-conducting layer 12, opening 13.
Embodiment
Below by embodiment, by reference to the accompanying drawings technological scheme of the present invention is described further:
As Fig. 1, Fig. 2, a kind of automobile exhaust thermal reaction purification device shown in Fig. 3, comprise shell 1, described shell 1 two ends are respectively equipped with suction tude 2, tailpipe 3, the catalyzer for partial combustion thing reaction in catalytic exhaust is provided with in described shell 1, one-level sleeve 4 is provided with in described shell 1, described suction tude 2 is communicated with the outer end of one-level sleeve 4, two-level sleeve 5 is provided with outside described one-level sleeve 4, between described one-level sleeve 4 and two-level sleeve 5, the gas exhaust piping be communicated with all is formed between two-level sleeve 5 with shell 1 inwall, described one-level sleeve 4, opening 13 direction of two-level sleeve 5 is contrary.Tail gas is discharged along gas exhaust piping, owing to there is one-level sleeve 4, two-level sleeve 5, therefore the discharge course of tail gas is commute until discharge, so just increase the RT of tail gas in gas exhaust piping, extend the reaction time, assisting simultaneously by the catalyzer such as platinum, rhodium, can improve reactive rate, reduces the ratio of partial combustion material in tail gas.Tail gas reaction needs to carry out at a certain temperature, and in routine techniques, lower apart from suction tude 2 temperature far away, be unfavorable for that tail gas clean-up reacts, tail gas pipeline in this programme belongs to back and forth sheathed form, the outer side wall of internal layer pipeline is just in the madial wall of outer pipeline, the heat of one-level sleeve 4 inner exhaust gas can pass to the tail gas in two-level sleeve 5 by sidewall, the heat of two-level sleeve 5 inner exhaust gas can pass to the tail gas in shell 1 by sidewall, thus, the exhaust temperature of all positions all can not be too low, can ensure that tail gas clean-up reaction is efficient, carry out smoothly, fully play the effect of tail gas clean-up.Moreover, exhaust emissions route is a reciprocating path, therefore, tail gas noise can run into each layer and block and multiple reflections, these retardances place comprise the place such as closed end, the closed end of shell 1 near suction tude 2 side of two-level sleeve 5, and the sound wave of reflection and the sound wave in exhaust emissions direction liquidate mutually, interfere, reduce acoustic energy, thus effectively reach the object of noise elimination.Described one-level sleeve inner end is provided with a perforated section 6, and described perforated section 6 is provided with some sound attenuation holes.The existence of sound attenuation hole, increases the viscous resistance to sound wave and surface friction drag, makes sound wave in propagation process, lose a part of acoustic energy.Described two-level sleeve 5 sidewall is provided with reflecting curtain 7, and described reflecting curtain 7 is between one-level sleeve 4 the inner and two-level sleeve 5 closed end.By reflecting curtain 7, undergoing mutation in the cross section making tail gas propagate pipeline, causes acoustic impedance to change, make a part along the acoustic reflection echogenicity of pipe transmmision, play the effect of noise elimination, and one-level sleeve 4 the inner is the most anxious place of exhaust gas flow, arrange reflecting plate at this place, reflecting effect is also the strongest.And low-frequency noise can be eliminated preferably by modes such as reflections.Described one-level sleeve 4 outer side wall, two-level sleeve 5 madial wall are provided with some microperforated panels 8, and the microperforated panel 8 on one-level sleeve 4, the microperforated panel 8 on two-level sleeve 5 successively interspersed arrangement form local eddy currents chamber.When sound wave is delivered on microperforated panel 8, because microperforated panel 8 inside has hole structure, not density equalization, therefore can there is relative movement in microperforated panel 8 internal structure, a part of acoustic energy is scattered and disappeared, play the effect of noise elimination, and the frequency range that microperforated panel 8 cuts down sound wave is also wider.And sound wave reaches after in local eddy currents chamber, roundtrip, refraction, form the sound wave congregation zone of similar eddy current, and at this place, liquidate the mutually dynamics of abatement of sound wave is very large, effectively can play the effect of noise elimination noise reduction.Tail gas then forms local eddy currents in local eddy currents chamber, the time of improving non-complete reaction gas degrees of fusion and temporarily retaining, makes purification more thorough.Interference plate 9 is provided with between described tailpipe 3 and the closed end of two-level sleeve 5, described interference plate 9 is provided with some through holes, described interference plate 9 radius is greater than the radius of two-level sleeve 5 closed end, and described interference plate 9 is arranged on the bottom surface of two-level sleeve 5 closed end by connecting rod.Be about to the position of discharging housing at tail gas, interference plate 9 be set, interference plate 9 has through hole, can not impact the normal discharge of tail gas, but certain acoustic interference effects can be caused again simultaneously, reduce exhaust sound further.Described two-level sleeve 5 is provided with some resonant cavities 10 be communicated with two-level sleeve 5, and described resonant cavity 10 is in " convex " font, and described resonant cavity 10 is in outside two-level sleeve 5.When sound wave incident is to the opening 13 of resonant cavity 10, because the sudden change of acoustic impedance, part acoustic energy will reflect back, and simultaneously under the effect of sound wave, the air column in resonant cavity 10 produces vibration, during vibrations, frictional damping makes again a part of acoustic energy change thermal dissipation into, only have small part radiating acoustic energy to go out, and these heat energy can as reaction time temperature guarantee, so, both played soundproof effect, and tail gas clean-up reaction temperature can be maintained again.Some sudden change blocks 11 are provided with between described shell 1 and two-level sleeve 5.By sudden change block 11, make the pipeline of sound wave through different cross section of rectilinear propagation, wherein a part of acoustic reflection forms reflected wave, creates the phase difference of 180 degree, mutually interferes, can reach the effect of noise elimination between reflected wave and original sound wave.In described one-level sleeve 4 sidewall, be provided with heat-conducting layer 12 in two-level sleeve 5 sidewall, on described one-level sleeve 4 sidewall, two-level sleeve 5 sidewall is provided with some openings 13, and heat-conducting layer 12 part being in opening 13 place contacts with the tail gas in gas exhaust piping.The heat of internal layer high-temperature tail gas can be passed to the lower tail gas of outer relative temperature by heat-conducting layer 12 better, maintains reaction temperature and is in reasonable region, ensure the persistency of tail gas clean-up reaction.Described heat-conducting layer 12 is made up of platinum or platinum alloy.Platinum or platinum alloy had both had the good capacity of heat transmission, were again the good catalyst of tail gas clean-up reaction, so can ensure that in gas exhaust piping, temperature is all not less than reaction temperature, can improve reaction efficiency again everywhere.

Claims (7)

1. an automobile exhaust thermal reaction purification device, comprise shell (1), described shell (1) two ends are respectively equipped with suction tude (2), tailpipe (3), the catalyzer for partial combustion thing reaction in catalytic exhaust is provided with in described shell (1), it is characterized in that, one-level sleeve (4) is provided with in described shell (1), described suction tude (2) is communicated with the outer end of one-level sleeve (4), two-level sleeve (5) is provided with outside described one-level sleeve (4), between described one-level sleeve (4) and two-level sleeve (5), the gas exhaust piping be communicated with all is formed between two-level sleeve (5) with shell (1) inwall, described one-level sleeve (4), the opening direction of two-level sleeve (5) is contrary, described one-level sleeve inner end is provided with a perforated section (6), described perforated section (6) is provided with some sound attenuation holes, described two-level sleeve (5) sidewall is provided with reflecting curtain (7), described reflecting curtain (7) is between one-level sleeve (4) the inner and two-level sleeve (5) closed end, described two-level sleeve (5) is provided with some resonant cavities (10) be communicated with two-level sleeve (5), described resonant cavity (10) is in " convex " font, described resonant cavity (10) is in two-level sleeve (5) outside.
2. a kind of automobile exhaust thermal reaction purification device according to claim 1, it is characterized in that, described one-level sleeve (4) outer side wall, two-level sleeve (5) madial wall are provided with some microperforated panels (8), and the microperforated panel (8) on one-level sleeve (4), the microperforated panel (8) on two-level sleeve (5) successively interspersed arrangement form local eddy currents chamber.
3. a kind of automobile exhaust thermal reaction purification device according to claim 1, it is characterized in that, interference plate (9) is provided with between described tailpipe (3) and the closed end of two-level sleeve (5), described interference plate (9) is provided with some through holes, and described interference plate (9) radius is greater than the radius of two-level sleeve (5) closed end.
4. a kind of automobile exhaust thermal reaction purification device according to claim 3, is characterized in that, described interference plate (9) is arranged on the bottom surface of two-level sleeve (5) closed end by connecting rod.
5. a kind of automobile exhaust thermal reaction purification device according to claim 1, is characterized in that, is provided with some sudden change blocks (11) between described shell (1) and two-level sleeve (5).
6. a kind of automobile exhaust thermal reaction purification device according to claim 1, it is characterized in that, in described one-level sleeve (4) sidewall, in two-level sleeve (5) sidewall, be provided with heat-conducting layer (12), on described one-level sleeve (4) sidewall, two-level sleeve (5) sidewall is provided with some openings (13), and heat-conducting layer (12) part being in opening (13) place contacts with the tail gas in gas exhaust piping.
7. a kind of automobile exhaust thermal reaction purification device according to claim 6, is characterized in that, described heat-conducting layer (12) is made up of platinum or platinum alloy.
CN201310362604.6A 2013-08-20 2013-08-20 A kind of automobile exhaust thermal reaction purification device Expired - Fee Related CN103527297B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108061295A (en) * 2017-07-14 2018-05-22 新能能源有限公司 A kind of buck oxygen-eliminating device
CN108825331B (en) * 2018-09-19 2023-09-15 上海天纳克排气系统有限公司 Silencer (muffler)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85202176U (en) * 1985-06-11 1986-07-30 北京工业大学 Duble-tube automobile exhaust purification silencer
CN2092607U (en) * 1991-05-13 1992-01-08 陈惠春 Purifying and sound-absorbing devices for automobile
CN201165892Y (en) * 2008-01-23 2008-12-17 张文波 Sound eliminator
CN201526433U (en) * 2009-10-16 2010-07-14 攀钢集团攀枝花钢钒有限公司 Compressor silencer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85202176U (en) * 1985-06-11 1986-07-30 北京工业大学 Duble-tube automobile exhaust purification silencer
CN2092607U (en) * 1991-05-13 1992-01-08 陈惠春 Purifying and sound-absorbing devices for automobile
CN201165892Y (en) * 2008-01-23 2008-12-17 张文波 Sound eliminator
CN201526433U (en) * 2009-10-16 2010-07-14 攀钢集团攀枝花钢钒有限公司 Compressor silencer

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