CN109404097A - Low temperature heating device for diesel engine exhaust purified treatment - Google Patents

Low temperature heating device for diesel engine exhaust purified treatment Download PDF

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Publication number
CN109404097A
CN109404097A CN201710704193.2A CN201710704193A CN109404097A CN 109404097 A CN109404097 A CN 109404097A CN 201710704193 A CN201710704193 A CN 201710704193A CN 109404097 A CN109404097 A CN 109404097A
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CN
China
Prior art keywords
low temperature
heating device
temperature heating
outlet
ignition
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201710704193.2A
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Chinese (zh)
Inventor
黄黎敏
黄利锦
黄会波
毛欣
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Guizhou Huang Cheng Polytron Technologies Inc
Original Assignee
Guizhou Huang Cheng Polytron Technologies Inc
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Publication date
Application filed by Guizhou Huang Cheng Polytron Technologies Inc filed Critical Guizhou Huang Cheng Polytron Technologies Inc
Priority to CN201710704193.2A priority Critical patent/CN109404097A/en
Priority to EP18187820.8A priority patent/EP3444456B1/en
Publication of CN109404097A publication Critical patent/CN109404097A/en
Pending legal-status Critical Current

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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
    • F01N3/02—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
    • 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
    • F01N3/0253—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 adding fuel to exhaust gases
    • F01N3/0256—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 adding fuel to exhaust gases the fuel being ignited by electrical means
    • 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
    • F01N3/029—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 by adding non-fuel substances 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
    • 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
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • 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
    • 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
    • F01N3/30—Arrangements for supply of additional air
    • 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
    • F01N3/36—Arrangements for supply of additional fuel
    • 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
    • F01N3/38—Arrangements for igniting
    • 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
    • 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
    • F01N2240/20—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 flow director or deflector
    • 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
    • F01N2270/00—Mixing air with exhaust gases
    • F01N2270/04—Mixing air with exhaust gases for afterburning
    • 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
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • 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
    • F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air

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

Abstract

The present invention relates to a kind of low temperature heating devices for diesel engine exhaust purified treatment, and the low temperature heating device includes: tubular shell, and the tubular shell has arrival end and outlet end, and the arrival end is connected to the exhaust pipe of engine；The ignition part in the housing sidewall is arranged in nearly arrival end, and the ignition part center is provided with oil inlet；The ignition pot being connected to and in communication with the ignition part, the ignition pot have open end and closed end, and the closed end is close to the arrival end of the tubular shell, and the open end is close to the outlet end of the tubular shell；And air inlet pipe, the air inlet pipe pass through the side wall of the tubular shell and the ignition pot and are passed through inside the ignition pot.The air inlet pipe has the first gas outlet and the second gas outlet, and first gas outlet is passed directly into inside the ignition pot, and second gas outlet is connected to the ignition part, and the ignition part is between the first outlet gas and the closed end.

Description

Low temperature heating device for diesel engine exhaust purified treatment
Technical field
The present invention relates to the fields handled for automobile exhaust gas purifying, in particular to for diesel engine Exhaust heats up to realize the regenerated field of grain catcher.
Background technique
With the execution of 5 discharge standard of Europe, diesel particulate filter (DPF) become one of diesel vehicle can not or Scarce technology.In recent years, with the increase of vehicle guaranteeding organic quantity, vehicular emission is increasingly becoming Chinese big city air pollution Main source.In the source of Beijing Ambient PM2.5, the share rate of automotive emission is up to 22%.Moreover, motor vehicle The particulate matter of discharge mostlys come from diesel vehicle.With China's diesel car emission control regulations increasingly stringent in recent years It puts into effect, the application of DPF will have a vast market foreground.
In diesel engine, the burning of diesel fuel is that nationality is realized by the self-ignition of different air/fuel mixtures. If incomplete combustion, due to oxygen lack, and particle is generated.This particle mainly includes carbon (carbon black), sulfate and not Completely burned hydrocarbon.To filter out this particle, diesel particulate trap has been disclosed in the prior art.
When using diesel particulate trap, it is typically due to filter loading rising, exhaust back pressure rises.Because starting mechanism It makes quotient to be impermissible for more than the exhaust back pressure allowed, and does not expect to generate because of maintenance cost caused by filter emptying, so, It is required for carrying out passive or active regeneration to filter.
In general, active diesel particulate trap system includes " electrically regenerative system " or " burner supports system System ", can manually trigger regeneration, either control regenerated triggering by monitoring exhaust back pressure open loop or closed loop.
In the prior art, burner is typically designed to comprising the injector with small opening, so as in combustion chamber Middle atomized fuel, wherein fuel is mixed with the necessary air that burns in a combustion chamber.The shortcomings that designing in this way is, sprays The small atomization opening of mouth may be coking quickly because of combustion residue, and upsets the operation of burner.For example, working as burner It will form combustion residue when closing.
In addition, the burner structure designed at present is more complicated, not only manufacturing process is troublesome, with high costs, but also is transporting It is easy to appear problem during row, such as discussed in Chinese patent application the CN201310019585.7th.In addition, also Some burners can only be regenerated in the case where vehicle parking or idling, and cannot be accelerated in vehicle or high-speed cruising When regenerated, such as discuss in Chinese patent application the 200780021783.1st.
Therefore, there is still a need for one kind, and the exhaust from diesel engine can heat up to reach bavin in the art Oil particles trap regeneration temperature and high-speed cruising can be kept in vehicle simultaneously or even still be able to reality under acceleration conditions The existing regenerated burner of grain catcher or low temperature heating device.
Summary of the invention
In order to realize foregoing purpose, present inventor, which proposes, a kind of realizes fuel burning using simple structure With the structure of exhaust-gas temperature rising.In this configuration, using the principle of eccentric air inlet, form the fresh air introduced in a combustion chamber Vortex, to be sufficiently mixed with fuel gas, to improve efficiency of combustion.Later, the flame of generation of burning is introduced directly into particle It in the mixing chamber of trap, is sufficiently mixed with the exhaust from exhaust pipe, so that the temperature of exhaust be increased, realizes granule capturing The regeneration of device.
Specifically, in one aspect of the invention, it provides a kind of for the low of diesel engine exhaust purified treatment Warm heating device, the low temperature heating device includes: tubular shell, and the tubular shell has arrival end and outlet end, the entrance End is connected to the exhaust pipe of engine；The ignition part in the housing sidewall is set close to arrival end, in the ignition part Centre is provided with oil inlet；The ignition pot being connected to and in communication with the ignition part, the ignition pot have open end and closed end, institute Closed end is stated close to the arrival end of the tubular shell, the open end is close to the outlet end of the tubular shell；And air inlet pipe, The air inlet pipe passes through the side wall of the tubular shell and the ignition pot and is passed through inside the ignition pot, which is characterized in that The air inlet pipe has the first gas outlet and the second gas outlet, and first gas outlet is passed directly into inside the ignition pot, institute It states the second gas outlet to be connected to the ignition part, the ignition part is between the first outlet gas and the closed end.Root There can not only be in vehicle parking or to accumulation the micro particle catching of cigarette ash in the case where in idling according to low temperature heating device of the invention Device, that is, DPF carries out real-time online regeneration, and can be in the state that vehicle is in high-speed cruising or in the state of accelerating There is the i.e. DPF of particle trapper of cigarette ash to carry out real-time online regeneration accumulation.And, it is even more important that with conventional low temperature Heating device or burner are compared, and are substantially shortened using the DPF on-line regeneration time that low temperature heating device according to the present invention carries out, very To the half of the reproduction time of only conventional exhaust treatment system.
The low temperature heating device according to first aspect, first outlet mouth of pipe are inserted into the combustion chamber with eccentric manner In.
The low temperature heating device according to first aspect is also set up between the igniting drum outer wall and the tubular shell There is splitter, the annulus of the splitter is equidistantly cut to rectangle or trapezoidal shape notch and the aliform being bent outwardly Portion.
The outlet extreme direction of the low temperature heating device according to first aspect, the aliform portion towards the tubular shell is curved Song, and with the plane where the annulus of the splitter at 10-90 ° of angle, preferably 10 °, 15 °, 20 °, 25 °, 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, 60 °, 65 °, 70 °, 75 °, 80 °, 85 ° of angles.
The low temperature heating device according to first aspect, before the splitter, on the inner wall of the tubular shell It is additionally provided with the conflux cover of cone cylinder shape, the conflux cover extends towards the outlet extreme direction, reduced diameter.
The side wall of the low temperature heating device according to first aspect, the side wall of the conflux cover and the tubular shell at 10-50 ° of angle, preferably 10 °, 15 °, 20 °, 25 °, 30 °, 35 °, 40 °, 45 °, 50 ° of angles.
The shell of the low temperature heating device according to first aspect, the low temperature heating device and installation grain catcher connects Logical, the shell includes the mixing chamber of the grain catcher and front positioned at rear portion, and the outlet end of the tubular shell is passed through institute It states in mixing chamber；And the exhaust pipe of diesel engine is passed through in the mixing chamber with eccentric manner.
Compared with prior art, low temperature heating device according to the present invention can be in vehicle and accelerate or even run at high speed Situation under stablize and light and regenerate the DPF of blocking uniformly, rather than as partially only stopping in the prior art in vehicle Vehicle or in idling mode when, could stablize the dpf regeneration lighted and make to install below.It is not limited to theory, reason may be Effectively shifted onto exhaust in the flame generated in this way, the dynamics that this flame is released is stronger, even if exhaust velocity compared with It is fast or accelerate, it can not be blown out, stable light and regenerate to realize.
Detailed description of the invention
The present invention is described below with reference to attached drawing.It should be appreciated that attached drawing be intended merely to explain by way of example and Illustrate the principle of the present invention, and has no intention to limit the invention to concrete scheme shown in attached drawing.In the accompanying drawings:
Fig. 1 is the cross section view of low temperature heating device according to an embodiment of the invention；
Fig. 2 is the schematic effect picture for showing the gas flow trace of low temperature heating device according to Fig. 1.
Specific embodiment
Low temperature heating device according to the present invention is described in detail below with reference to attached drawing.However, the ordinary skill people of this field Member is it will be appreciated that each embodiment given below is used for the purpose of that those skilled in the art is made to better understood when this Invention, without the purpose of any restrictions.The scope of the present invention is defined by the claims.
Fig. 1 shows burner according to an embodiment of the invention, i.e., for increasing the low temperature of engine exhaust temperature Heating device.The low temperature heating device is used to be mounted on the end of automobile (especially diesel vehicle) exhaust pipe of engine, is mentioned by burning Heating load realizes the regeneration of grain catcher to improve the temperature of engine exhaust.
In the embodiment depicted in fig. 1, low temperature heating device includes: tubular shell, and the tubular shell has arrival end And outlet end, the arrival end are connected to the exhaust pipe of engine；Close to arrival end, the igniting in the housing sidewall is set Portion is provided with oil inlet in the ignition part center；The ignition pot being connected to and in communication with the ignition part, the ignition pot have Open end and closed end, the closed end is close to the arrival end of the tubular shell, and the open end is close to the tubular shell Outlet end；And air inlet pipe, the air inlet pipe pass through the side wall of the tubular shell and the ignition pot and are passed through the igniting Cylinder is internal.Particularly, the air inlet pipe has the first gas outlet and the second gas outlet, and first gas outlet is passed directly into described Inside ignition pot, second gas outlet is connected to the ignition part, and the ignition part is located at the first outlet gas and described Between closed end.
Igniter plug is mounted on combustion chamber by the mounting base of tubulose, close to the closed end of combustion chamber, for lighting burning The mixture of fuel oil present in room and air.In one embodiment, fuel oil sprays into burning through the pipeline among igniter plug Room, and lighted via igniter plug.In other embodiments, igniter plug is also possible to conventional electric plug, such as conventional use In the electric plug of diesel engine.Certainly, igniter plug is also possible to refractory ceramics fire rod, such as by silicon nitride barred body and sets It sets and is made in such as tungsten wire of heating wire wherein.
Ignition pot in a tubular form, including a closed end and an open end.Open end is towards the exhaust side of diesel engine To the thermal current generated for exporting burning.Closed end is used to the thermal current of generation rebound to opening extreme direction, stops simultaneously The thermal current of generation towards exhaust opposite direction flowing, to improve the thermal efficiency.In one embodiment, ignition pot is by resistant to high temperature Metal is made, such as is made of stainless steel.
First outlet mouth of pipe is inserted into the ignition pot with eccentric manner.Eccentric manner refers to the center of the first outlet mouth of pipe Line is not directed at the center line of ignition pot, but deviates the center certain distance of ignition pot, so that the first outlet mouth of pipe Outlet is not directed at the center of ignition pot, and is in alignment with its partial sidewall.In this way, entering igniting by air inlet pipe in fresh air When in cylinder, the side wall of ignition pot is impacted first, then along wall flow, swirling eddy is formed, to be conducive in ignition pot It is sufficiently mixed with the fuel oil (or atomized fuel) entered from oil inlet, is conducive to burn.
Second outlet mouth of pipe of air inlet pipe is connected to the tubulose mounting base of igniter plug, thus by the fresh feeding igniter plug in part In, it is mixed for fuel oil, initial ignition mixture is provided.Generally, the amount of the fresh air entered through the first outlet mouth of pipe (for example, by volume) is 9:1 to 1:1, for example, 8:1,7 with the ratio between the amount of fresh air flowed into through the second outlet mouth of pipe: 1,6:1,5:1,4:1,3:1 or 2:1 or the arbitrary value between them.By changing the first outlet mouth of pipe and the second escape pipe The amount for the fresh air that mouth flows into can flexibly change the indoor fuel-air ratio of burning, to realize different combustion positions. For example, the ratio, for example, 8:1 can suitably be turned up, the reason is that at this time when diesel engine is in parking or idling conditions The amount of exhaust is smaller, and the gas composition for accounting for combustion chamber is smaller, and the fresh air of relatively small amount is just able to maintain that fuel oil sufficiently fires It burns.In contrast, when diesel engine is in accelerated condition or high-speed cruising, the amount of exhaust is relatively large, causes to account for burning The ratio of indoor gas is higher, needs for more fresh airs to be sent into igniter plug at this time, to realize the full combustion of fuel oil. In one embodiment, such ratio adjustment is by the way that the gear at the second outlet mouth of pipe is arranged in such a way that part is fixed Piece (not shown) is realized.When air-flow is smaller, the opening of baffle is smaller, therefore only less amount of air stream enters igniter plug In；When air-flow increases, the opening of baffle increases, and larger amount of air stream enters in igniter plug, to realize the first escape pipe AIR Proportional in mouth and the second outlet mouth of pipe is adjusted.
Splitter is additionally provided between the igniting drum outer wall and the tubular shell, the annulus of splitter is equidistant It is cut to rectangle or trapezoidal shape notch and the aliform portion being bent outwardly.The outlet extreme direction of aliform portion towards tubular shell is curved Song, and with the plane where the annulus of splitter at 10-90 ° of angle.In a preferred embodiment, the angle be 10 °, 15 °, 20 °, 25 °, 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, 60 °, 65 °, 70 °, 75 °, 80 ° or 85 °.More preferably implement at one In scheme, which is 45 °.
It is not limited to any theory, the linear flow direction that engine comes is changed into direction of rotation by splitter, thus Increase the contact area of air-flow and flame, guarantee gas thermally equivalent, reduces air-flow and directly hit showing for conflux cover generation sinuous flow As.
In one embodiment, the conflux of cone cylinder shape is additionally provided with before splitter, on the inner wall of tubular shell Cover, conflux cover extend towards the outlet extreme direction, reduced diameter.The side wall of conflux cover and the side wall of tubular shell are at 10- 50 ° of angles.In a preferred embodiment, which is 10 °, 15 °, 20 °, 25 °, 30 °, 35 °, 40 °, 45 ° or 50 °.Conflux cover will The deflection air-flow conflux that splitter generates, abundant flame is close, reaches good heating effect.
In another embodiment, the exhaust from engine enters low-temp ignitor by admission line, through shunting Piece, the discharge of conflux cover；The gas of air pump enters by air inlet pipe, igniter and ignition pot is flowed through, by burned flame at igniter gas It takes out of at conflux cover, thus the gas that heating comes through engine, and the gas mixing with air pump, form high-temperature gas row Out.Rotary pneumatic is first mixed to form by setting splitter and conflux cover, the thermal current for generation of burning and the exhaust from engine Stream is sufficiently mixed to realize later by slightly convergence, is conducive to uniformly regenerate DPF, DPF is effectively prevent to exist It ruptures, prolongs its service life because of uneven heating in regenerative process.In addition, heat also greatly improved in the uniform mixing Efficiency reduces the fuel consumption in regenerative process, has further functioned as the effect of energy-saving and emission-reduction.
In another embodiment, low temperature heating device is connected to the shell of installation grain catcher, and shell includes after being located at The grain catcher in portion and the mixing chamber of front, the outlet end of tubular shell are passed through in mixing chamber；And the row of diesel engine Tracheae is passed through in the mixing chamber with eccentric manner.In this way, forming swirling eddy into the exhaust in mixing chamber, it is convenient for and burning The thermal current of generation is sufficiently mixed, to realize the uniform regeneration of DPF.In addition, the advantage arranged in this way is low temperature heating Device can cooperate at bending with exhaust pipe-shaped rather than be fitted a straight line, and be conducive to flexibly install, improve the adaptation of low temperature heating device Performance.
Embodiment 1: burning of the low temperature heating device under idling
Low temperature heating device configures as shown in Figure 1, and details are not described herein.Low temperature heating device and engine exhaust pipeline are pacified Dress.Engine is the diesel vehicle of Dong Feng Auto Corporation, and capacity is 2.8 liters.Comparative example is Chinese patent application the Low temperature heating device disclosed in 200780021783.1.
Firstly, starting engine, carries out low temperature heating device according to formula in the state of idling, acceleration and high-speed cruising It preheats, light, observe igniting reliability of the flame under idling, that is, see whether that stabilization is lighted, if occur being blown out by exhaust The case where and record.
Next, (wherein being had accumulated a large amount of in the installation of low temperature heating device outlet end through used grain catcher, that is, DPF Cigarette ash, but DPF is intact), and according to formula carry out regeneration tests.Burning is in observation DPF during the experiment It is no uniform, and record multiple temperature.It is whether cracked that DPF is detected after experiment.
Embodiment 2: burning of the low temperature heating device under high speed and accelerated condition
Low temperature heating device configures as shown in Figure 1, details are not described herein.Low temperature heating device and engine exhaust pipeline are pacified Dress.Engine is the diesel vehicle of Dong Feng Auto Corporation, and capacity is 2.8 liters.Comparative example is Chinese patent application the Low temperature heating device disclosed in 200780021783.1.
Firstly, starting engine, carries out low temperature heating device according to formula in the state of idling, acceleration and high-speed cruising It preheats, light, observe igniting reliability of the flame under idling, that is, see whether that stabilization is lighted, if occur being blown out by exhaust The case where and record.
Next, (wherein being had accumulated a large amount of in the installation of low temperature heating device outlet end through used grain catcher, that is, DPF Cigarette ash, but DPF is intact), and according to formula carry out regeneration tests.Burning is in observation DPF during the experiment It is no uniform, and record multiple temperature.It is whether cracked that DPF is detected after experiment.
Finally, the DPF completed to regeneration weighs, and deashing rate is calculated based on the DPF weight before regeneration.To more A deashing rate averages, and characterizes regeneration level with this.
The result of Examples 1 and 2 is shown in table 1 below.
Table 1: the result of embodiment 1 and embodiment 2
In embodiment 1 and embodiment 2, low temperature heating device according to the present invention is stable in embodiment 1 and embodiment 2 It lights, and accumulation can be made to have the DPF of cigarette ash to stablize regeneration, deashing rate reaches 90% or so, shows the effect for making dpf regeneration It is very good, and do not occur the case where DPF is ruptured or cracked.
In addition, low temperature heating device according to the present invention is averaged the used time in the case where guaranteeing 90% or higher dpf regeneration It can be achieved with regenerating within 10 minutes or so, and comparative example then needs 20 minutes or so, even up to 30 minutes.In this way, according to this hair Fuel consumption used in bright system regeneration is greatly reduced, while also extending the service life of fire rod.
In contrast to this, in the comparative example, in the idling state, DPF be averaged deashing rate also only have 85% or so.And adding In the state of speed and high-speed cruising, very small flame is observed, and the temperature of DPF arrival end is very low, only 300 DEG C of left sides The temperature of dpf regeneration is not achieved in the right side at all, therefore deashing rate is almost nil, i.e. low-temperature-rise disclosed in comparative example in this state Warm device cannot make dpf regeneration at all.
By above-mentioned experimental data it is found that either in the idling state, or in the state of accelerating or running at high speed, root According to low temperature heating device of the invention due to the low temperature in comparative example in terms of lighting reliability or stability, DPF deashing Heating device.

Claims (7)

1. a kind of low temperature heating device for diesel engine exhaust purified treatment, the low temperature heating device include:
Tubular shell, the tubular shell have arrival end and outlet end, and the arrival end is connected to the exhaust pipe of engine；
The ignition part in the housing sidewall is set close to arrival end, the ignition part center is provided with oil inlet；
The ignition pot being connected to and in communication with the ignition part, the ignition pot have open end and closed end, and the closed end is leaned on The arrival end of the nearly tubular shell, the open end is close to the outlet end of the tubular shell；With
Air inlet pipe, the air inlet pipe pass through the side wall of the tubular shell and the ignition pot and are passed through inside the ignition pot,
It is characterized in that, the air inlet pipe has the first gas outlet and the second gas outlet, first gas outlet is passed directly into institute It states inside ignition pot, second gas outlet is connected to the ignition part, and the ignition part is located at the first outlet gas and institute It states between closed end.
2. low temperature heating device according to claim 1, wherein first outlet mouth of pipe is inserted into the combustion with eccentric manner It burns in room.
3. low temperature heating device according to any one of claim 1 to 3, wherein in the igniting drum outer wall and the tubulose Be additionally provided with splitter between shell, the annulus of the splitter be equidistantly cut to rectangle or trapezoidal shape notch and to The aliform portion of outside sweep.
4. low temperature heating device according to claim 4, wherein outlet extreme direction of the aliform portion towards the tubular shell Bending, and with the plane where the annulus of the splitter at 10-90 ° of angle, preferably 10 °, 15 °, 20 °, 25 °, 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, 60 °, 65 °, 70 °, 75 °, 80 °, 85 ° of angles.
5. low temperature heating device according to any one of claim 1 to 3, wherein before the splitter, in the pipe The conflux cover of cone cylinder shape is additionally provided on the inner wall of shape shell, the conflux cover extends towards the outlet extreme direction, and diameter is gradually It reduces.
6. low temperature heating device according to claim 5, wherein the side wall of the side wall of the conflux cover and the tubular shell At 10-50 ° of angle, preferably 10 °, 15 °, 20 °, 25 °, 30 °, 35 °, 40 °, 45 °, 50 ° of angles.
7. low temperature heating device according to claim 1, wherein the shell of the low-temperature-rise temperature device and installation grain catcher Connection, the shell include the mixing chamber of the grain catcher and front positioned at rear portion, and the outlet end of the tubular shell is passed through In the mixing chamber；And the exhaust pipe of diesel engine is passed through in the mixing chamber with eccentric manner.
CN201710704193.2A 2017-08-17 2017-08-17 Low temperature heating device for diesel engine exhaust purified treatment Pending CN109404097A (en)

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EP18187820.8A EP3444456B1 (en) 2017-08-17 2018-08-07 Low temperature heater for exhaust gas purification and treatment of diesel engine

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Publication number Priority date Publication date Assignee Title
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EP3517747B1 (en) * 2018-01-29 2020-08-12 Guizhou Huangdi Technology Co., Ltd. Low temperature heater for exhausted gas purification processing of diesel engine

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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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Application publication date: 20190301