CN206571557U - Exhaust treatment system for Diesel engine - Google Patents
Exhaust treatment system for Diesel engine Download PDFInfo
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- CN206571557U CN206571557U CN201621138037.1U CN201621138037U CN206571557U CN 206571557 U CN206571557 U CN 206571557U CN 201621138037 U CN201621138037 U CN 201621138037U CN 206571557 U CN206571557 U CN 206571557U
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Abstract
The utility model is related to a kind of exhaust treatment system for Diesel engine.A kind of exhaust treatment system for Diesel engine, it is characterised in that the exhaust treatment system includes：The particle trapper that the low temperature heating device in diesel engine exhaust downstream is connected with the low temperature heating device is arranged on, the particle trapper is wall-flow honeycomb formula ceramic filter, for trapping the particulate matter from engine exhaust.The low temperature heating device includes：Columnar shell body, the oil inlet pipe being fixed on the shell body sidewall and air inlet pipe；The ignition part set close to the fuel-firing preheating portion of the arrival end setting of the shell body, close to the port of export of shell body, the ignition part is fixed on the side wall of the shell body；And combustion chamber, the combustion chamber is connected with the lower end of the ignition part and is fixed on by the ignition part on the side wall of the combustion chamber, wherein being stretched into positioned at the anterior firing tip of the ignition part in the combustion chamber.
Description
Technical field
The utility model is related to exhaust gas from diesel vehicle post processing field.Specifically, the utility model is related to for making diesel vehicle
Tail gas heating, filter and the exhaust treatment system and its renovation process that are regenerated to used particle trapper.
Background technology
Diesel engine is to obtain exergonic engine by burning diesel oil.The fuel of use for diesel engine is diesel oil, it
Ratio of viscosities gasoline is big, it is not easy to evaporate, and its autoignition temperature is lower than gasoline.The advantage of Diesel engine is that moment of torsion is big, economical
Performance is good, therefore, is widely used in large-sized diesel equipment, is particularly suitable for the use of cargo vehicle, such as Large-power High-Speed
Diesel engine main supporting heavy-duty car, motorbus, engineering machinery, ship, generating set etc..
But, because operating pressure is big, diesel engine requires that each relevant part has higher structural strength and rigidity, so
Diesel engine is heavier, and volume is larger；The injection pump of diesel engine requires high with the nozzle accuracy of manufacture, so cost is higher；In addition,
Diesel engine rough running, vibration noise is big；Diesel oil is difficult evaporation, starting difficulty during winter cold car.Due to These characteristics, former bavin
Oil turbine is generally used on large and medium-sized load truck.Further, since Diesel engine is heavier, power per liter index is not so good as
Gasoline engine (rotating speed is relatively low), noise, vibrates higher, and soot and particle (PM) are discharged than more serious, thus it is all the time seldom by
To the favor of car.The particularly new development of miniature high-speed Diesel engine, a collection of advanced technology, such as electric controlled direct spray, altogether
Rail, turbocharging, in the technology such as cold be able to apply on miniature diesel engine, obtain the shortcoming that original Diesel engine is present
Preferable solution has been arrived, and diesel engine is in energy-conservation and CO2Advantage in terms of discharge, then be all heating power including gasoline engine
What engine can not replace, as " environmental-friendly engine ".
But, due to diesel vehicle soot with particulate emission than more serious, so the application of diesel vehicle is received than larger
Limitation.The emphasis of diesel engine emissions pollutant catabolic gene is PM.Diesel particulate emission is reduced to meet discharge standard
With the requirement of regulation, after-treatment device must also be used simultaneously in addition to using emission controls by improving combustion, and particle trapper (DPF) is current
One of post-processing technology most effective, most with prospects of control Particulate Emission of proposition.
Particle trapper can reduce cigarette ash produced by Diesel engine up to more than 90%.The particle matter captured with
Removed afterwards by regenerating.The regeneration of so-called filter refers to that in DPF long-term works the particulate matter in catcher gradually increases meeting
Cause engine back pressure to raise, cause engine performance to decline, so periodically to remove the particulate matter of deposition, recover DPF mistake
Filter performance.The regeneration of catcher has two methods of initiative regeneration and passive regeneration：Initiative regeneration refer to using outside energy come
The temperature in catcher is improved, makes particulate ignition.When the temperature in catcher reaches 550 DEG C, the particulate matter of deposition is just
Meeting oxidizing fire, if temperature does not reach 550 DEG C, excessive deposit will block catcher, at this moment be accomplished by using additional
The energy (such as change of electric heater, burner or engine operating condition) improves the temperature in DPF, makes particulate matter
Burning.Passive regeneration refers to reducing the ignition temperature of particulate using fuel oil additive or catalyst, enables particulate just
Ignition at a temperature of normal diesel exhaust gas.Additive (such as cerium, iron and strontium) will be added in fuel oil in certain proportion, addition
Agent can excessively influence DOC life-span, but if very few, may result in regeneration delays or regeneration temperature rise.
Chinese patent application CN103104321A is proposed after a kind of diesel engine exhaust disclosed in 15 days Mays in 2013
Handle heat riser and temperature-rising method.In this application, the temperature of DPF waste gas is lifted into using low temperature heating device, is made
The carbon particle burning that must be accumulated in DPF, so that dpf regeneration.However, the atomization of fuel oil and insufficient in this application, because
The burning-point of this fuel-air mixture formed is higher, causes required fire rod temperature higher.Further, since in the Shen
Please in fire rod simultaneously play a part of preheating and igniting, it is therefore desirable to keep high temperature for a long time, cause fire rod to be easily damaged,
Need often replacing；And because fire rod is arranged on inside oversheath, it is difficult to be individually replaced, thus bring cost increase and
The problems such as safeguarding inconvenient.In addition, relatively low (for example, the northeast region of China, outdoor temperature in the environment temperature that automobile is exercised
Generally reach subzero 20-30 degree) in the case of, due to insufficient to fuel oil and preheating of air, cause low temperature heating device frequent
It can not smoothly light, i.e. loss of ignition, and then cause dpf regeneration to fail.Meanwhile, such loss of ignition also produces secondary dirt
Dye.
Utility model content
In view of foregoing problems, the utility model proposes a kind of exhaust treatment system for Diesel engine, the tail gas
Processing system can in various complex working conditions, especially be under cryogenic brought rapidly up diesel oil and the fresh air of introducing,
Igniting, so that waste gas, which is rapidly heated to particle trapper, regenerates required temperature so that carbon of the accumulation in particle trapper
Particle can pass through the quick purpose removed, realize real-time online regeneration of burning in the short period of time.Simultaneously as employing
The fuel-firing preheating portion of oil tank formula is preheated to fuel oil, is shortened the working time of pre- hot pin, is prevented pre- hot pin to be chronically at
The condition of high temperature, so as to extend the service life of pre- hot pin.Further, since being carried out before ignition to air and fuel oil multiple pre-
Heat, it is possible to increase the temperature of fuel-air mixture, and then improve the stability lighted, makes burning in low temperature heating device more
To be abundant, the risk of secondary pollution is reduced, the economy of fuel oil is improved.
Above mentioned problem is addressed by following scheme：
There is provided a kind of exhaust treatment system for Diesel engine in the first aspect.The exhaust treatment system bag
Include：Low temperature heating device, the low temperature heating device is arranged on the tailpipe downstream of Diesel engine, including：Columnar shell body,
The arrival end of the shell body and the exhaust pipe mouth of diesel car engine are connected；It is fixed on the oil inlet pipe on the shell body sidewall
And air inlet pipe；Close to the shell body arrival end set fuel-firing preheating portion, wherein the fuel-firing preheating portion by oil storage overcoat,
The oil storage inner sleeve that is arranged in the oil storage overcoat, the heater plug being arranged in the oil storage inner sleeve and connect with the oil storage inner sleeve
Logical flowline is constituted, and the port of export of the oil inlet pipe is connected in the side wall upper part of the oil storage inner sleeve with the oil storage inner sleeve；
The ignition part set close to the port of export of shell body, the ignition part is fixed on the side wall of the shell body；And combustion chamber, institute
Combustion chamber is stated to be connected and be fixed on the side wall of the combustion chamber by the ignition part with the lower end of the ignition part, wherein
Stretched into positioned at the anterior firing tip of the ignition part in the combustion chamber；And the micro particle catching being connected with the low temperature heating device
Device, the particle trapper is wall-flow honeycomb formula ceramic filter, for trapping the particulate matter from engine exhaust.
By the low temperature heating device, it can make fully to be atomized by well-mixed fuel-air mixture and reduce it
Burning-point, then fights burning through fire rod point, so that the delivery temperature from Diesel engine is raised rapidly, until reaching peace
Regeneration temperature needed for particle trapper mounted in downstream.Therefore, using the exhaust treatment system in this aspect, it will can come from
Most particles (for example, more than 95% particulate matter) in the exhaust of Diesel engine are removed using particle trapper,
Also, the particle accumulated in particle trapper can smoothly be removed by burning, so as to realize the real-time of particle trapper
On-line regeneration.
Exhaust treatment system according to first aspect, flowline and the combustion chamber in the fuel-firing preheating portion connect
It is logical, to input preheated fuel oil to the combustion chamber；The air inlet pipe and the combustion chamber, with defeated to the combustion chamber
Enter fresh air.
Exhaust treatment system according to first aspect, the ignition part includes ceramic ignition plug and described for installing
The installation portion of ceramic ignition plug, the ceramic ignition plug is fixed on the side wall of the shell body by the installation portion.Pass through
Using the ceramic ignition plug for being resistant to high temperature, the temperature of igniter plug can be risen to the high temperature of comparison, thus improve fuel oil-
Air mixture lights stability, reduces because of the secondary pollution that loss of ignition is brought.
Exhaust treatment system according to first aspect, the combustion chamber is by the first combustion chamber Taper Pipe, combustion chamber straight tube
Constituted with the second combustion chamber Taper Pipe, be relatively large in diameter one end and one end of the combustion chamber straight tube of first combustion chamber Taper Pipe connect
Connect, the smaller one end of diameter connects with the flowline or is connected with the spray chamber；The diameter of second combustion chamber Taper Pipe compared with
Big one end is connected with the other end of the combustion chamber straight tube, and the smaller one end of diameter forms flame ejiction opening.Utilize such burning
Room, can make fuel-air mixture fully burn wherein, and using smaller one end of diameter of the second combustion chamber Taper Pipe,
It can prevent exhaust from putting out part flame because pressure difference is largely introduced into combustion chamber or even blow out combustion chamber.
Exhaust treatment system according to first aspect, also sets up between the combustion chamber and the fuel-firing preheating portion
There is spray chamber, one end of the spray chamber is connected with the combustion chamber, the other end is connected with the flowline in the fuel-firing preheating portion.
In one embodiment, the spray chamber and one end that the flowline is connected are provided with air-fuel mixture portion, the oil gas
Mixing unit includes nozzle carrier and the nozzle core connected with the flowline, and the nozzle core is engaged to the inside of the nozzle carrier,
The jet of the nozzle core is arranged on the center of its point diameter smaller portions, the centrally disposed spraying with the nozzle carrier
Mouth alignment, is communicated to the inside of the spray chamber jointly；Or, the nozzle core has multiple jets, and is placed equidistant
On the side wall of the point diameter smaller portions of the nozzle core.
By setting spray chamber, the air-fuel mixture portion especially with atomizing functions can make the combustion from fuel-firing preheating portion
The fuel-air mixture that oil and the air from air inlet pipe are formed sprays after atomization, so as to form Fuel Air spray
Mist.The ignition point of fuel oil can be so reduced, so as to be conducive to improving the stability lighted.Meanwhile, fuel oil after atomization-
The burning of air mixture is more abundant, can so reduce the consumption of fuel oil and due to insufficient caused two secondary environments that burn
Pollution, further improves fuel economy, meets the relevant regulations of country.
Exhaust treatment system according to first aspect, is additionally provided with horn-shaped duct in the spray chamber, described
It is that horn-shaped duct extends by cylindrical duct and by described cylindrical duct one end, stretched to form horn-like conduit mouth
Multiple conduit bars are constituted, and the other end of the cylindrical duct is connected with the nozzle carrier.Utilize the horn-shaped duct, Neng Goubao
Shield ceramic ignition plug does not blow cold or blown out by fresh air, while also functioning to the effect of guiding fresh air.
Exhaust treatment system according to first aspect, the air inlet pipe has first be arranged in the nozzle carrier
The inner chamber of the nozzle carrier is led in gas outlet and the second gas outlet, first gas outlet, is connected with the nozzle；Described
The spray chamber is led in two gas outlets, with the combustion chamber.So, the part fresh air and fuel oil introduced through air inlet pipe
Mix, after through atomization spray.Another part fresh air is sent to combustion chamber, serves combustion-supporting.
Exhaust treatment system according to first aspect, also sets up between the spray chamber and the horn-shaped duct
There is the air register of annular, multiple passages are equidistantly provided with the air register.The air register can be to introducing
Fresh air is disperseed, so as to be conducive to fully burning.
Exhaust treatment system according to first aspect, in the side wall of first combustion chamber Taper Pipe of the combustion chamber
On be equidistantly provided with multiple inclined exhaust ingress pipes, it is preferable that the center line of the exhaust ingress pipe and the shell body
The angle of center line formation is 30 degree to 60 degree, such as 35 degree, 40 degree, 45 degree, preferably 50 degree, 55 degree, 45 degree.
Exhaust treatment system according to first aspect, the oil inlet pipe and/or the air inlet pipe are located at the shell
An internal part is arranged to bending tube shape, the manifold shapes with branch road or spiral disc tube shape, and is arranged in described
The inner or outer side at combustor exit end, on the path that flame sprays, it is preferable that the swan-neck is shaped as U-shaped, semicircle
The shape of shape or zigzag.It is tubular by the way that the part is arranged into bending tube shape, the manifold shapes with branch road or spiral disc
Shape, by increasing capacitance it is possible to increase the stroke of air inlet pipe and/or oil inlet pipe in exhaust, that is, increase its time with containing exit gases, so that fully
The fresh air or fuel oil of introducing are preheated using the temperature of itself is vented, so that lighting after being conducive to.
In a specific embodiment, the oil inlet pipe is arranged to the first oil-feed tube portion, the second oil-feed tube portion
With the 3rd oil-feed tube portion, the length side of the first oil-feed tube portion and the 3rd oil-feed tube portion along the shell body
To being arranged in the shell body, the second oil-feed tube portion is arranged on the inside or outside of the burner ends, positioned at fire
On the path that flame sprays, wherein the second oil-feed tube portion is arranged to U-bend, semicircle bend pipe, snake bend, spiral shape
The form of bend pipe or manifold with branch road.Set using such oil inlet pipe, by increasing capacitance it is possible to increase fuel oil is in oil inlet pipe and in fire
Residence time in the path that flame sprays, so that fuel oil is being carried out fully before being ejected using the thermal current produced by burning
Preheating, is conducive to smoothly lighting for fuel oil.
Exhaust treatment system according to first aspect, water conservancy diversion fan blade is additionally provided with the front end of the combustion chamber.Should
Water conservancy diversion fan blade is made up of steel stamping, is fixed between side wall and central shaft, is set in clockwise direction or in side counterclockwise
To setting, it can carry out rectification clockwise or counterclockwise to the gas from combustion chamber, play the work of dispersed thermal current
With so as to avoid flame and thermal current from carrying out concentration heating to the pocket of particle trapper, solving particle trapper false
The problem of frequent regeneration as caused by regeneration.
Exhaust treatment system according to first aspect, flow spoiler is additionally provided with the downstream of the low temperature heating device,
Preferably, the flow spoiler includes housing, is arranged on the flange at housing two ends and is arranged on multiple equal pressing plates of enclosure interior
With multiple mixed plates, the circumferential inner wall of the equal pressing plate and the mixed plate along housing is equably set；The equal pressing plate and
The axis direction of the mixed plate and housing is angularly disposed into 60 °~80 °, with the inwall of housing into 60 °~80 ° along gaseous mixture
The airflow direction of body is set.Using the flow spoiler, the heated exhaust stream from low temperature heating device can be made by further equal
Pressure and uniform flow, so as to realize the abundant heating of exhaust.
Exhaust treatment system according to first aspect, what the low temperature heating device housing was connected with the exhaust pipe mouth
Connecting portion is in the cone shape of interior diameter gradual change so that the interior diameter of the straight-tube portion of the low temperature heating device housing is more than described
The interior diameter of exhaust pipe mouth.Such setting can make pressure and the flow velocity reduction into the exhaust of low temperature heating device housing, from
And exhaust and the thermal current produced by burning is had more times of contact, be conducive to the heating of exhaust.Meanwhile, it is such to set
Stop of the low temperature heating device housing to exhaust can be reduced, the back pressure of exhaust is reduced.
Exhaust treatment system according to first aspect, between the low temperature heating device and the particle trapper also
Oxidation catalyst is provided with, for removing hydrocarbon and partial particulate thing in exhaust.
Exhaust treatment system according to first aspect, the honeycomb ceramic filter filter or the oxidized form are urged
Change device to be made up of cordierite, carborundum or recrystallized silicon carbide.
Exhaust treatment system according to first aspect, is provided with taper mixing before the oxidation catalyst
Lid, for scattered and uniform heated exhaust, makes it uniformly heat oxidation catalyst.The taper mixes lid
Center line is overlapped with oxidation catalyst center line, and the drift angle of its conical cavity is 100 to 160 degree, for example, 110 degree, 120
Degree, 130 degree, 140 degree, preferably 145 degree, 150 degree, 140 degree.Exhaust is from the vertex of a cone towards the flowing of cone tail direction, so as to uniformly be divided
Dissipate.Uniformly lid evenly spreads to the heated exhaust from low-temperature-rise temperature device in oxidation catalyst for the taper so that oxygen
Change type catalyst converter can be by homogenous combustion and heating, further such that the DPF for being arranged on oxidation catalyst downstream can be equal
Even burning and heating, so as to realize DPF uniform regeneration, it is to avoid DPF is because of heating is uneven and ruptures situation.
It is used to make the exhaust treatment system being arranged on diesel engine exhaust road again there is provided a kind of in second aspect
Raw method, the exhaust treatment system is the exhaust treatment system according to first aspect, it is characterised in that methods described
Comprise the following steps：1) pressure at the real-time monitoring particulate trap two ends of pressure sensor installed in particle trapper two ends is passed through
Power is poor, and reproducer is started when the value of the pressure differential reaches default regeneration threshold value；2) pre- hot pin is opened to be preheated, when
When reaching predetermined preheating time, fresh air is inputted to air inlet pipe, fuel oil is inputted to oil inlet pipe, while adding to ceramic ignition plug
Electricity, the Fuel Air spraying formed by fresh air and fuel oil of igniting, is heated to exhaust；3) by being caught installed in particulate
The delivery temperature of the real-time monitoring particulate trap porch of temperature sensor at storage two ends, is sprayed with the Schema control of fuzzy prediction
Oil mass, when temperature is not up to default particle trapper regeneration temperature, improves distributive value；And 4) when monitoring micro particle catching
When the pressure differential at device two ends falls back to default regeneration ending threshold value, stop preheating, stop input fresh air and fuel oil, then
Power off ceramic ignition plug.With it, carbon particle of the accumulation in DPF can be made to be removed completely by burning, so that real
Existing DPF uniform regeneration, is recycled and reused for the removal of particulate matter.
Compared with background technology, technical scheme provided by the utility model have many advantages, such as it is described above, for example
The abundant atomization of fuel-air mixture, burning-point are reduced, stably lighted, fully burning, reducing exhaust back pressure etc., these advantages
Exhaust treatment system provided by the utility model is made in extreme operating mode, especially at a temperature of less than zero degree
Delivery temperature is raised, so as to realize the regeneration of particle trapper.Never it can solve the problem that for a long time which solve this area
Particle trapper regeneration problem, so as to be laid a solid foundation for the extensive use of diesel vehicle.
Brief description of the drawings
The utility model is described below with reference to accompanying drawing.It should be appreciated that accompanying drawing is intended merely to solve by way of example
Release and illustrate principle of the present utility model, and have no intention to be limited to the utility model into concrete scheme shown in accompanying drawing.
In accompanying drawing：
Fig. 1 is the signal of the exhaust treatment system for Diesel engine according to one embodiment of the utility model
Figure；
Fig. 2 is the schematic diagram of the low temperature heating device of the exhaust treatment system according to one embodiment of the utility model；
Fig. 3 is the schematic diagram in the fuel-firing preheating portion of the low temperature heating device according to one embodiment of the utility model；
Fig. 4 is the schematic diagram of the combustion chamber componentses according to one embodiment of the utility model；
Fig. 5 is spray chamber according to one embodiment of the utility model and the structural representation in air-fuel mixture portion；
Fig. 6 is the structural representation of the flow spoiler according to one embodiment of the utility model；
Fig. 7 A are the structural representations of the bent tube form air inlet pipe according to one embodiment of the utility model；
Fig. 7 B are the structural representations of the manifold shape air inlet pipe with branch road according to the utility model another embodiment.
Fig. 8 is illustrated according to the operation principle of the honeycomb ceramic filter filter of one embodiment of the utility model
Figure；
Fig. 9 is the operation principle schematic diagram of the oxidation catalyst according to one embodiment of the utility model.
In figure：100- exhaust treatment systems；101- exhaust inlet pipes；102- low temperature heating devices；103- flow spoilers；104- oxygen
Change type catalyst converter；105- particle trappers；106- exhaust exit pipes；107- temperature sensors；108- pressure sensors；Outside 201-
Housing；202- fuel-firing preheatings portion；203- air inlet pipe；204- oil inlet pipes；205- ignition parts；206- combustion chambers；207- spray chambers；
208- flanges；301- oil storage inner sleeves；302- oil storage overcoats；303- heater plugs；304- preheats obturating plug；401- combustion chambers straight tube；
The first combustion chambers of 402- Taper Pipe；403- circular holes；The second combustion chambers of 404- Taper Pipe；502- nozzle carriers；503- nozzle cores；504- loudspeaker
Shape conduit；505- air registers；601- flow spoiler housings；602- flow spoiler flanges；The equal pressing plates of 603-；604- mixed plates.
Embodiment
Embodiment of the present utility model is described below in conjunction with accompanying drawing.One of ordinary skill in the art can manage
Solution, describes and illustrates just for the sake of illustrating principle of the present utility model below, and has no intention to protect of the present utility model
Shield scope is limited to the various concrete modes enumerated.
Embodiment 1：A kind of exhaust treatment system 100 for Diesel engine
Fig. 1 shows the schematic diagram of the exhaust treatment system 100 according to one embodiment of the utility model.At the tail gas
Reason system 100 is arranged on the tailpipe downstream of Diesel engine, for handling the exhaust from blast pipe, to remove it
In nitrogen oxides and most particulate matter, such as more than 95% particulate matter.Only sprayed with most of at present use
Enter fuel oil to promote burning to make the conventional processing systems of dpf regeneration different, it is logical according to exhaust treatment system 100 of the present utility model
Cross pilot fuel-air mixture and raise the temperature of diesel engine exhaust using the heat of burning generation, so as to realize
Various operating modes, the DPF trouble-free burnings especially under severe rugged environment and regeneration, even at according to tail gas of the present utility model
It is also such that reason system 100, which is used under the operating mode of extreme temperature,.
With reference to Fig. 1, exhaust treatment system 100 includes the exhaust entrance 101 being connected with the blast pipe of Diesel engine and row
The low temperature heating device 102 of gas entrance connection, the flow spoiler 103 being connected with low temperature heating device 102, the oxygen being connected with flow spoiler 103
Change type catalyst converter 104, the particle trapper 105 being connected with oxidation catalyst 104 and the row being connected with particle trapper 105
Gas outlet 106.Certainly, in the exhaust gas processing device 100 shown in Fig. 1, it can also be catalyzed without using flow spoiler 103 and oxidized form
Device 104.The use of the purpose of flow spoiler 103 is to promote being sufficiently mixed and heating up for exhaust, but it is not essential.Increase oxidation
Type catalyst converter 104, it is possible to use the catalyst wherein coated makes NO be oxidized to NO2, and part dissolved organic matter is removed, enter
The temperature of one step lifting exhaust.However, what oxidation catalyst 104 nor is it necessary that, in the temperature rise effect of low temperature heating device 102
In the case of good, the temperature that delivery temperature can be made directly to be increased to needed for dpf regeneration, so that the carbon in DPF will be accumulated
Particle is removed completely, thoroughly.
In one embodiment, the shell of these parts is all made up of steelwork, is preferably made up of stainless steel material.
It the surface of these parts is kept light, reduce accumulation and the corrosiveness of dust.In another embodiment, this
Connected between a little parts by flange.So, the installation, dismounting and replacing of these parts are conducive to.Certainly, these parts also may be used
To be connected by other connected modes known to one of ordinary skill in the art, such as welding.
Exhaust inlet pipe 101 is connected with the exhaust pipe mouth (not shown) of Diesel engine, for receiving exhaust.It is excellent at one
In the embodiment of choosing, the diameter of the exhaust inlet pipe 101 diametrically cone shape, i.e. its one end being connected with blast pipe of gradual change
Less than the diameter of the one end being connected with low temperature heating device 102, as shown in Figure 1.So, when exhaust enters low temperature heating device
When 102, pressure and flow velocity diminish so that being vented the thermal current with wherein producing in low temperature heating device 102 has longer connect
The time of touching, so that exhaust can be heated more fully.Such arrangement also reduces the resistance of 102 pairs of exhausts of low temperature heating device
Power.The remaining part of exhaust treatment system 100 shown in Fig. 1 is described in detail below with reference to Fig. 2-5.
One important component of the exhaust treatment system 100 is low temperature heating device 102.In an example, low temperature heats up
Device 102 is received and the burn fuel from oil inlet pipe 204 and the fresh air from air inlet pipe 203.The fuel can come
From the fuel of engine, such as diesel oil.Or, the fuel can also be the liquid or gaseous fuel being provided separately, such as propane,
Ethanol etc..
Low temperature heating device 102 can be placed as having heat transfer relation with the exhaust from the exhaust pipe of engine.For example,
Low temperature heating device 102 can be connected directly in the path of exhaust flowing, for the heating exhaust gas flowed into shell is arrived
The particle trapper that lifting is arranged on the efficiency of oxidation catalyst 104 (DOC) downstream and allows downstream further to set
The relatively-high temperature of 105 (DPF) regeneration.Alternately, low temperature heating device 102 can be also used for engine start it
Preceding preheating exhaust system, to improve the efficiency of exhaust system in engine start, so as to reduce cold start emission.
With reference to Fig. 2, low temperature heating device 102 can include：Columnar shell body 201, the arrival end of the shell body 201
It is connected with the exhaust pipe mouth of diesel car engine；The oil inlet pipe 204 and air inlet pipe 203 being fixed on the side wall of shell body 201；
The fuel-firing preheating portion 202 set close to the arrival end of the shell body 201, wherein the fuel-firing preheating portion 202 is by oil storage overcoat
302nd, the oil storage inner sleeve 301 that is arranged in the oil storage overcoat 302, the heater plug being arranged in the oil storage inner sleeve 301 and with
The flowline that the oil storage inner sleeve 301 is connected is constituted, the side wall of the port of export of the oil inlet pipe 204 in the oil storage inner sleeve 301
Top is connected with the oil storage inner sleeve 301；The ignition part 205 set close to the port of export of the shell body 201, the ignition part
205 are fixed on the side wall of the shell body 201；With combustion chamber 206, the combustion chamber 206 and the lower end of the ignition part 205
Connect and be fixed on by the ignition part 205 on the side wall of the combustion chamber 206, wherein before the ignition part 205
The firing tip in portion is stretched into the combustion chamber 206.The all parts of low-temperature-rise temperature device 102 are described in detail below.
Shell body 201 is steel shell, for accommodating the exhaust from the exhaust pipe of engine.For example, shell body 201 is not by
Rust steel such as SUS409 materials are made.Shell body 201 is connected by the mouth of pipe of the attachment means such as flange and the exhaust pipe of engine.When
So, it can also be connected by other interconnection techniques known to one of ordinary skill in the art.In the embodiment shown in Figure 2,
The right-hand end of shell body 201 be arrival end, it is connected with the mouth of pipe of the blast pipe (not shown) of Diesel engine, in order to from
The exhaust of engine is flowed into wherein.Certainly, shown direction is merely exemplary in fig. 2, gas inlet port and outlet
The position or orientation at end can be exchanged.In addition, under actual installation situation, gas inlet port and air exit end can also be in
Vertical direction is arranged, and for example up, air exit end is in lower section, and this is depended on according to of the present utility model low for gas inlet port
Installation position of the warm heating device 102 on diesel vehicle.
In one embodiment, although not shown, the connecting portion that shell body 201 is connected with exhaust pipe mouth is in interior diameter
The cone shape of gradual change so that the interior diameter of the straight-tube portion of shell body 201 is more than the interior diameter of the exhaust pipe mouth.So,
Increase the interior diameter of shell body 201 compared with blast pipe, the flow velocity of exhaust can be reduced, be conducive to the heating of exhaust.In addition,
The advantage so set is that low temperature heating device 102, especially its all parts can also be reduced to a certain extent
The increased exhaust back pressure of arrangement institute.
Oil inlet pipe 204 is used to be introduced from outside into fuel oil, such as diesel oil, propane or alcohol in high concentration, in low-temperature-rise
Burning produces thermal current in warm device 102100, to heat the exhaust from the exhaust pipe of engine.Oil inlet pipe 204 can be by plastic tube
Or steel pipe is made.But, it is contemplated that the high temperature in blast pipe, preferably oil inlet pipe 204 is made up of stainless steel tube, can so be resistant to
High temperature, while preventing oil inlet pipe 204 from being corroded by exhaust.In addition, in order to prevent the sulfur corrosion oil inlet pipe 204 in exhaust, oil inlet pipe
Corrosion-resistant finishes can also be coated on 204.
In some cases, because diesel vehicle is frequently necessary in relatively harsh environment condition (such as China northeast
Microthermal climate (or even to subzero 30 degree or so)) under work, cause the temperature of fuel oil too low and be difficult to light, so at some
In embodiment, the part that oil inlet pipe 204 is located in shell body 201 is configured to bending tube shape, the manifold shape with branch road
Shape or spiral coil shape, and this is partially disposed on the end of combustion chamber 206 inner or outer side, the path sprayed positioned at flame
On.So, after low temperature heating device 102 starts igniting, the fuel oil flowed in the part oil inlet pipe 204 can be burned institute
The thermal current heating of generation so that the temperature of fuel oil is even further improved by applying coatings.
In an exemplary embodiment, oil inlet pipe 204 can be arranged to the first oil-feed tube portion, the second oil-feed pipe portion
Divide and the 3rd oil-feed tube portion.First oil-feed tube portion and the 3rd oil-feed tube portion are straight tube, along the inner side of shell body 201
Wall cloth is put.Second oil-feed tube portion is the form of spiral coil, is arranged on the inside of the end of combustion chamber 206 or outside, positioned at fire
On the path that flame sprays.So, after low temperature 102 ignition of heating device, the thermal current sprayed can be to the of bending
Two oil-feed tube portions are heated, so as to improve the temperature of oil-feed, are conducive to further burning.
The fuel-firing preheating portion 202 according to one embodiment of the utility model is described below with reference to Fig. 3.Fuel-firing preheating portion
202 are used to preheat fuel oil, so that fuel oil temperature high with regard to that can reach comparison before low temperature heating device 102 is ignited
Degree, improves the stability of igniting.This ensures that, can be in harsh ring according to low temperature heating device 102 of the present utility model
Also can smoothly, reliably it be lighted under the conditions of border.
As it was previously stated, fuel-firing preheating portion 202 by oil storage overcoat 302, the oil storage inner sleeve 301 being arranged in oil storage overcoat 302,
The heater plug being arranged in oil storage inner sleeve 301 and the flowline connected with the oil storage inner sleeve 301 are constituted.The He of oil storage overcoat 302
Oil storage inner sleeve 301 is made by steel pipe.For example, being both made of stainless steel material.The work of 302 insulations of oil storage overcoat
With.Oil storage inner sleeve 301 is used to store fuel oil.There is gap, for playing thermal insulation separation between oil storage overcoat 302 and oil storage inner sleeve 301
The effect of heat.It is vacuum between oil storage overcoat 302 and oil storage inner sleeve 301, to strengthen insulation as a preferred scheme
Effect.In one embodiment, the flowline in fuel-firing preheating portion 202 is connected with combustion chamber 206, with defeated to combustion chamber 206
Enter preheated fuel oil.
As shown in figure 3, oil storage overcoat 302 and oil storage inner sleeve 301 are connected with preheating obturating plug, and shell is fixed on by it
On the side wall of body 201.The cylindrical portion in preheating obturating plug center is stretched into oil storage inner sleeve 301 so that coordinated in the cylindrical part
Heater plug in point be can extend into oil storage inner sleeve 301, and fuel oil is preheated.Heater plug can be by silicon nitride barred body and ceramics
Pressing mold is formed, and exportable up to 1100 degree of high temperature ensures warm operation, and can under 1300 degree of high-temperature conditions normal work
Make.Resistant to elevated temperatures tungsten filament is provided with silicon nitride barred body or molybdenum filament makees electric conductor.As another alternative solution, heater plug is by nitrogenizing
Boron barred body and ceramic pressing mold are formed, and resistant to elevated temperatures tungsten filament or molybdenum filament are provided with boron nitride barred body as electric conductor.Preheat obturating plug
It is made up of SUS310S materials, is resistant to more than 1200 degree of high temperature, the performance of real-time guard heater plug extends it and uses the longevity
Life.
In use, when the nickel wire that heater plug is connected by end is powered up, heater plug starts heating, and
Middle circle cylindrical portion by the heat transfer of generation to preheating obturating plug, and then the combustion transferred heat to around cylindrical portion
Oil, so that the temperature of fuel oil is improved.Because not arrheaing for fuel oil is dynamic so that heated fuel oil is through under fuel-firing preheating portion 202
The flowline at end leaves oil storage inner sleeve 301, and new fuel oil is supplemented in realize circulation and the stream of fuel oil by oil inlet pipe 204
Dynamic heating.Simultaneously as fuel oil does not stop to take away the heat of cylindrical portion, therefore built-in heater plug will not be too high because of temperature
And be damaged, the service life of heater plug is extended, the replacement cost of heater plug is reduced.
One important component of low temperature heating device 102 is ignition part 205, for the fuel oil from flowline or through spray of igniting
The fuel-air mixture that mouthpiece atomization sprays.Ignition part 205 can be electric plug commonly used in the art, such as gasoline
The electric plug commonly used in machine ignition system.However, preferably, ignition part 205 uses ceramic ignition plug.Ceramic ignition
Plug is formed by silicon nitride ignition electrode or boron nitride ignition electrode (being wherein built-in with Electrothermic wire) and ceramic pressing mold.Electrothermic wire is preferred
For tungsten filament, or preferably molybdenum filament.The high temperature that exportable 1100 degree of ceramic ignition plug ensures work of igniting, and can be 1300
Spend normal work under high-temperature condition.The mounting seat of ceramic ignition plug is made by SUS310S materials, is resistant to 1200 degree of high temperature, in real time
The performance of ceramic ignition plug is protected, extends its service life.
Low temperature heating device 102 is additionally provided with combustion chamber 206, and combustion chamber is stretched into positioned at the anterior firing tip of ceramic ignition plug
In 206, with the mixture of ignite fuel oil and air from fuel-firing preheating portion 202.With reference to Fig. 1, combustion chamber 206 is straight by combustion chamber
Pipe, the first combustion chamber Taper Pipe and the second combustion chamber Taper Pipe are formed.The side wall of combustion chamber straight tube connects with the installation portion of ceramic ignition plug
Connect and be fixed on by it on shell body 201, be relatively large in diameter one end and one end of combustion chamber straight tube of the first combustion chamber Taper Pipe connect
Connect, the other end is connected with the flowline in fuel-firing preheating portion 202, to introduce fuel-air mixture；Second combustion chamber Taper Pipe and combustion
The other end connection of room straight tube is burnt, flame ejiction opening is formed.Alternately, the first combustion chamber Taper Pipe is relatively large in diameter
One end is connected with one end of combustion chamber straight tube, and the other end is connected with spray chamber 207 so that Fuel Air is sprayed through spray chamber 207
Combustion chamber 206 is just sent to after atomization.Each component of combustion chamber 206 is shown specifically in Fig. 4.
Also it is provided with multiple circular holes 303 at an equal pitch on the first mixing chamber Taper Pipe, exhaust is introduced for installing
Exhaust introduces pipe (not shown).In one embodiment, it is tubaeform stainless steel tube that exhaust, which introduces pipe, what it was relatively large in diameter
Flared end is located at outside the first mixing chamber Taper Pipe, for introducing exhaust.In another embodiment, it is to tilt that exhaust, which introduces pipe,
Set, wherein the center line that exhaust introduces pipe is formed relative to the center line of combustion chamber 206 or the center line of shell body 201
Angle, for example, the angle is 30 to 60 degree, for example, 35 degree, 40 degree, 45 degree, preferably 50 degree, 55 degree, 45 degree.It is such to incline
Tiltedly it is provided with and is uniformly mixed beneficial to by the thermal current produced in partial engine exhaust feeding mixing chamber with burning, so as to abundant
Heating.In addition, exhaust resistance will not be significantly increased in such be obliquely installed.
As a preferred scheme, spray chamber 207 is additionally provided between combustion chamber 206 and fuel-firing preheating portion 202.Atomization
One end of room 207 is connected with the flowline in fuel-firing preheating portion 202, the preheated fuel oil for introducing；The other end and combustion chamber 206
Connection, for fuel-air mixture to be inputted in combustion chamber 206.Spray chamber 207 can be made up of cylindrical steel tube, for example
It is made up, is connected by modes well known in the art such as welding with combustion chamber 206 of SUS304.It is described in detail below with reference to Fig. 5
According to the spray chamber 207 of one embodiment of the utility model.
In Figure 5, the one end being connected in spray chamber 207 with flowline is provided with air-fuel mixture portion.Air-fuel mixture portion includes
The nozzle core for being connected nozzle carrier with the side wall of spray chamber 207 and being connected with flowline.The point diameter smaller portions of nozzle core are matched somebody with somebody
The inside of nozzle carrier is bonded to, certain clearance space is formed between the two, the flowing as fuel oil or fuel-air mixture is led to
Road.Several through holes are equidistantly distributed with the side wall circumference of nozzle core point diameter smaller portions, as jet, make to come from
The fuel oil of flowline is flowed into clearance space.In one embodiment, the fore-end of nozzle core is formed as cone shape,
To be conducive to the flowing of fuel oil.In this embodiment, it is provided with spray in the part being aligned with the cone shape of nozzle carrier
Mist mouthful, is ejected into the inner chamber of spray chamber 207 for being atomized the fuel-air mixture from clearance space.
In a preferred embodiment, air inlet pipe 203 is connected with the nozzle carrier of spray chamber 207, and the air inlet pipe 203
With the first gas outlet and the second gas outlet being arranged in nozzle carrier.The inner chamber of nozzle carrier is led in first gas outlet, with spraying
Mouth connection, part fresh air is introduced into the inner chamber of nozzle carrier and is mutually mixed with introduced fuel oil, then through spraying
Mouth atomization sprays；Spray chamber 207 is led in second gas outlet, is connected with combustion chamber 206, and part fresh air is sent into combustion chamber
In 206, serve combustion-supporting.
As a preferred scheme, horn-shaped duct is additionally provided with spray chamber 207.With reference to Fig. 5, horn-shaped duct with
The nozzle carrier connection in air-fuel mixture portion, including cylindrical duct and several conduit bars for being stretched out by the cylindrical duct.These
The end of conduit bar is expanded outwardly, and is formed horn-like.Such horn-shaped duct can guide the flowing that Fuel Air is sprayed,
Make its homogeneous perturbation, realize fully combustion-supporting effect.In an example, horn-shaped duct is by the stainless steelwork system of cylindrical shape
Into its fore-end is uniformly cut away several parts, so as to form conduit bar, then expands the end of the conduit bar, shape
Into the opening shape of expansion.
As further preferred scheme, the air gear of annular is additionally provided between spray chamber 207 and horn-shaped duct
Plate, is equidistantly provided with multiple passages in air register.For example, the air register is made up of stainless steel pressing, in its ring
Multiple passages, such as 5,7 or 9 passages are equidistantly stamped out in shape part so that the air from air inlet pipe 203 by
Flowed into passage, reduce the flow velocity of introduced fresh air, water conservancy diversion is carried out to fresh air and scattered, so as to be conducive to it
Mixed with fuel-air mixture, to realize abundant burning.
In order that exhaust and the thermal current produced through burning are uniformly mixed, in one embodiment, in combustion chamber 206
Front end is provided with water conservancy diversion fan blade or flow spoiler 103.Water conservancy diversion fan blade or flow spoiler 103 are known by those skilled in the art such as flanges
Mode be connected with the shell body 201 of low temperature heating device 102.
In one embodiment, water conservancy diversion fan blade is made up of multiple stainless steel fan blades, is set in clockwise direction or is in
Counterclockwise set, for carrying out rectification clockwise or counterclockwise to the gas from combustion chamber 206, play dispersed heat
The effect of air-flow, so as to avoid flame and thermal current from carrying out concentration heating to the pocket of particle trapper 105, is solved micro-
The problem of grain trap 105 illusion regenerates caused frequent regeneration.
One exemplary of flow spoiler 103 is shown in Figure 6.Preferably, flow spoiler 103 includes housing, set
Housing two ends flange and be arranged on the multiple equal pressing plates and multiple mixed plates of enclosure interior, equal pressing plate and mixed plate along
The circumferential inner wall of housing is equably set；The axis direction of equal pressing plate and mixed plate and housing is angularly disposed into 60 °~80 °, with
The inwall of housing is set into 60 °~80 ° airflow directions along mixed gas.In one embodiment, housing is by stainless steel
Housing is made, and equal pressing plate and mixed plate are also made up of stainless steel pressed sheet.In another embodiment, equal pressing plate and mixed plate system
Into the shape of half water droplet.
Equal pressing plate and mixed plate are fixed on stainless steel case by modes known to one of ordinary skill in the art such as welding
On the inwall of body, it is with the axis direction of housing and the inwall of housing into 60 ° of angles.Set flow spoiler 103 purpose be make through
Burn the thermal current produced and exhaust from blast pipe be sufficiently mixed, thus realize exhaust uniform heating and DPF it is equal
Weighing apparatus regeneration.It reduce because of DPF ruptures caused by heating inequality.
The conduit that air inlet pipe 203 can be made for stainless steel, is connected with combustion chamber 206, for introducing new air into combustion
Burn in room 206.As a preferred scheme, air inlet pipe 203 has two gas outlets, wherein nozzle carrier is led in the first gas outlet
Inner chamber, is connected with nozzle.Spray chamber 207 is led in second gas outlet, is connected with combustion chamber 206.So, draw through air inlet pipe 203
Part fresh air and the fuel oil entered is mixed, after through atomization spray.Another part fresh air is sent to combustion chamber 206,
Serve combustion-supporting.
As another example, in order to be preheated to air, air inlet pipe 203 designs as follows：Air inlet pipe 203 is located at outer
A part in housing 201 is arranged to bending tube shape, the manifold shapes with branch road or spiral disc tube shape, and the part
Positioned at the medial lateral of the port of export of combustion chamber 206, on the path that flame sprays.In one embodiment, bend tubular
Shape is U-shaped, the shape of semicircle or zigzag.Certainly, swan-neck can also be other shapes known to the ordinary person of this area.
In a specific embodiment, air inlet pipe 203 is arranged to the first air inlet tube portion, the second air inlet tube portion and
Three air inlet tube portions, wherein the first air inlet tube portion and the 3rd air inlet tube portion are straight tube, respectively along the inner side of shell body 201
Wall length direction is arranged；Second air inlet tube portion is the form of swan-neck, the manifold with branch road or spiral coil, is arranged on burning
On the inside or outside of the end of room 206, on the path that flame sprays.Such air inlet pipe 203, which is designed, causes gas flowing through the
The thermal current preheating that can be produced during two air inlet tube portions by flame, so as to improve its intake air temperature, is conducive to lighting and stably
Burning.Preferably, the second air inlet tube portion can be U-bend, semicircle bend pipe, snake bend, toroidal bend
Or the form of the manifold with branch road, can so increase the contact area of air inlet pipe 203 and thermal current, extension air inlet it is heated when
Between.It is such that setting is for low temperature heating device 102 and the exhaust gas purification system including this low temperature heating device 102 is in temperature ratio
The application of harsher area such as the Northeast of China is highly beneficial.If not using such setting, from air inlet pipe 203
Fresh air temperature is too low, can cause loss of ignition, and increase produces the risk of secondary pollution.One of such air inlet pipe 203
Example is shown in fig. 7, wherein the part of the second air inlet pipe 203 is arranged to U-shape.It is provided with another with branch road manifold
The example of air inlet pipe 203 shows in figure 7b, and wherein fresh air flows through manifold and is divided into 3 streams flows in flame sprays path
It is dynamic, so that the area contacted with thermal current is significantly increased, play good air preheat effect.
In one embodiment, in order to strengthen the insulation effect of low temperature heating device 102, also set up in shell body 201
There is inner housing.The port of export of inner housing expands and alignd with the port of export of shell body 201, and the arrival end of inner housing is expanded into loudspeaker
Mouth-shaped, between the port of export and ignition part 205 of shell body 201, its edge is fixed on the inwall of the shell body 201
On.Clearance space is provided directly with shell body 201 and inner housing, plays insulation and thermal insulation.Preferably, the clearance space
Interior is vacuum, to further enhance insulation and adiabatic effect.
As it was previously stated, the low temperature heating device 102 in embodiment 1 can be stablized under harsh environment condition such as low temperature environment
Ignition, stable burning, therefore, the low temperature heating device 102 can also stablize ignition in such a situa-tion, stably burn and make and
Stablize from the exhaust of the exhaust pipe of engine, equably heat up, reach the temperature conditionss needed for the exhaust gas treating device subsequently set.
One of core component as exhaust treatment system 100, particle trapper 105 is that DPF can use current ability
The conventional honeycomb ceramic filter filter in domain, the wall-flow type honeybee being for example made up of cordierite, carborundum or recrystallized silicon carbide
Nest ceramic filter.The advantage of wall-flow honeycomb filter particulate matter most in it can remove exhaust, such as 95%
Particulate matter above, so that its discharge reaches current highest discharged particle requirement.Honeycomb ceramic filter filter
Operation principle figure 8 illustrates.With reference to Fig. 8, particulate matter is trapped within through in the alternately amplifier case of plug-hole, being accumulate to
By being flared off after a certain amount, so as to realize the regeneration of filter.
In one embodiment, the honeycomb ceramic filter mistake being made up of recrystallized silicon carbide is especially preferably used
Filter, such as " Yellow Emperor, a legendary ruler " board recrystallized silicon carbide ceramic honey comb wall flow particulate filters (DPF).The filtering is blocked using interaction
Honeycomb channel between porous partition capture the particulate in diesel exhaust, it is micro- with extremely strong capture soot superfine nano
The ability of grain.Meanwhile, the filter area of the filter is big, and pressure drop is relatively low, compact conformation, with excellent high temperature resistant, corrosion-resistant
Performance and heat conductivility, mechanical strength are big, and thermal shock resistance is strong, and service life is long.
The major parameter of the filter is shown in table 1 below：
Table 1：The major parameter of the honeycomb ceramic filter filter prepared by recrystallized silicon carbide：
| Technical characteristic | Unit | |
| SiC content | % | ＞ 99 |
| Beehive lattice quantity per square inch | cpsi | 200~300 |
| The beehive lattice length of side | mm | 1.20~1.45 |
| Honeycomb wall thickness | mm | 0.30~0.35 |
| Porosity | % | 42~60 |
| Median pore size | μm | 9~20 |
| Compression strength | MPa | ＞ 13~18 |
| Coefficient of thermal expansion (40~800 DEG C) | 10-6 | 4.30~4.40 |
| Thermal conductivity (at 500 DEG C) | W/mK | ＞ 14 |
| Capture rate | % | ＞ 98~99 |
| Honeycomb ceramics bulk density | Kg/L | ~0.80 |
| Filter area | m2/L | ~0.75 |
| Permeability | m2 | 5.0 × 10-12 of ＜ |
| Thermal shock resistance parameters (Δ T) | ℃ | 250 |
The filter is examined through Tianjin Suo Ke automobile tests Co., Ltd according to the VERT test specifications of international endorsement
Test, drooping characteristic meets the requirements, the average value of particulate gravimetric analysis filter efficiency reaches 96.50%, and obtains Chinese environmental guarantor
Protect product certification agency qualification.
Preferably, oxidation catalyst is additionally provided between particle trapper in low temperature heating device (or flow spoiler), i.e.,
DOC well known in the art.The purpose for setting DOC is for removing hydrocarbon and partial particulate thing in exhaust.For example,
DOC can be those DOC usually used in current Diesel engine.
The oxidation catalyst that diesel engine for automobile is used is using noble metals such as platinum (Pt), palladiums (Pd) as catalyst, main drop
The content of soluble organic fraction (SOF) in low Particulate Emission is so as to reduce PM discharge.It can effectively reduce exhaust simultaneously
In HC, CO.Oxidation catalyzer can remove 90% SOF, so that PM discharges reduce 40%~50%.It is to HC's and CO
Treatment effeciency can respectively reach 88%, 68%.Catalytic oxidation technologies have good to the SOF in removing diesel particle
Effect, i.e., set up catalytic converter in diesel engine exhaust system, SOF is urged in the noble metal catalysts such as platinum, rhodium and palladium or rare earth
Oxidation reaction occurs in the presence of agent etc. and is converted into CO2And H2O and remove, its usual removal efficiency is up to 80%.May be used also simultaneously
The harmful substances such as HC and CO in removing tail gas.
DOC transforming principle figure 9 illustrates.For example, containing CO, HC, SOF, PAH etc. in the exhaust of Diesel engine
Material, after being converted through DOC oxidations, the obtained main CO of product2And H2O, so that exhaust is Partial cleansing.
Embodiment 2：A kind of renovation process of exhaust treatment system for Diesel engine
It is used to make the exhaust treatment system being arranged on diesel engine exhaust road again there is provided a kind of in this embodiment
Raw method.The exhaust treatment system can be the exhaust treatment system described in embodiment 1.Certainly, the vent gas treatment system
System can also be that obtained exhaust treatment system is improved to the exhaust treatment system described in embodiment 1.
In one embodiment, renovation process comprises the following steps：1) pressure at real-time monitoring particulate trap two ends
Difference, reproducer is started when the value of the pressure differential reaches default regeneration threshold value；2) pre- hot pin is opened to be preheated, when up to
During to predetermined preheating time, fresh air is inputted to air inlet pipe, fuel oil is inputted to oil inlet pipe, while adding to ceramic ignition plug
Electricity, the Fuel Air spraying formed by fresh air and fuel oil of igniting, is heated to exhaust；3) monitoring particulate trapping in real time
The delivery temperature of device porch, with the Schema control distributive value of fuzzy prediction, when temperature is not up to default particle trapper again
During raw temperature, distributive value is improved；And 4) when the pressure differential for monitoring particle trapper two ends falls back to default regeneration ending
During threshold value, stop preheating, stop input fresh air and fuel oil, then power off ceramic ignition plug.With it, can make
The carbon particle accumulated in DPF is removed completely by burning, so as to realize DPF uniform regeneration, is recycled and reused for going for particulate matter
Remove.
For the ease of the pressure and temperature at measurement DPF two ends, temperature sensor is respectively provided with DPF front-end and back-end
Such as thermocouple and pressure sensor, for example figure 1 illustrates temperature sensor 110 and pressure sensor 107.Through temperature sensor
Control unit (the example that the temperature value of 110 measurements and the pressure value measured through pressure sensor 107 are respectively transmitted to be separately provided
Such as ECU) in, the foundation being controlled as control unit.
Above-mentioned embodiment is used for illustrating the utility model, preferred embodiment only of the present utility model,
Rather than the utility model is limited.It is new to this practicality in spirit of the present utility model and scope of the claims
Any modification, equivalent substitution and improvements that type is made etc. are both fallen within protection domain of the present utility model.
Claims (19)
1. a kind of exhaust treatment system (100) for Diesel engine, it is characterised in that the exhaust treatment system (100)
Including：Low temperature heating device (102), the low temperature heating device (102) is arranged on the tailpipe downstream of Diesel engine, including：
Columnar shell body (201), the arrival end of the shell body (201) and the exhaust pipe mouth of diesel car engine are connected；
The oil inlet pipe (204) and air inlet pipe (203) being fixed on the wall of the shell body (201) side；
The fuel-firing preheating portion (202) set close to the arrival end of the shell body (201), wherein the fuel-firing preheating portion (202)
By oil storage overcoat (302), the oil storage inner sleeve (301) being arranged in the oil storage overcoat (302), it is arranged on the oil storage inner sleeve
(301) heater plug in and the flowline connected with the oil storage inner sleeve (301) are constituted, the port of export of the oil inlet pipe (204)
Connected in the side wall upper part of the oil storage inner sleeve (301) with the oil storage inner sleeve (301)；
The ignition part (205) set close to the port of export of shell body (201), the ignition part (205) is fixed on the shell body
(201) on side wall；With
Combustion chamber (206), the combustion chamber (206) is connected with the lower end of the ignition part (205) and by the ignition part
(205) on the side wall for being fixed on the shell body (201), wherein stretching into institute positioned at the anterior firing tip of the ignition part (205)
State in combustion chamber (206)；And
The particle trapper (105) being connected with the low temperature heating device (102), the particle trapper (105) is wall-flow type honeybee
Socket ceramic filter, for trapping the particulate matter from engine exhaust.
2. exhaust treatment system (100) according to claim 1, it is characterised in that fuel-firing preheating portion (202) go out
Oil pipe is connected with the combustion chamber (206)；The air inlet pipe (203) connects with the combustion chamber (206).
3. exhaust treatment system (100) according to claim 1, it is characterised in that the ignition part (205) includes ceramics
Igniter plug and the installation portion for installing the ceramic ignition plug, the ceramic ignition plug are fixed on described by the installation portion
On the side wall of shell body (201).
4. exhaust treatment system (100) according to any one of claim 1 to 3, it is characterised in that the combustion chamber
(206) it is made up of the first combustion chamber Taper Pipe, combustion chamber straight tube and the second combustion chamber Taper Pipe, the diameter of first combustion chamber Taper Pipe
Larger one end is connected with one end of the combustion chamber straight tube, and the smaller one end of diameter is connected with the flowline；Second burning
The one end that is relatively large in diameter of room Taper Pipe is connected with the other end of the combustion chamber straight tube, and the smaller one end of diameter forms flame ejiction opening.
5. exhaust treatment system (100) according to claim 1, it is characterised in that the combustion chamber (206) and described
Spray chamber (207), one end and the combustion chamber (206) of the spray chamber (207) are additionally provided between fuel-firing preheating portion (202)
Connection, the other end is connected with the flowline of the fuel-firing preheating portion (202).
6. exhaust treatment system (100) according to claim 5, it is characterised in that the spray chamber (207) with it is described
One end of flowline connection is provided with air-fuel mixture portion, the air-fuel mixture portion include nozzle carrier (502) and with the flowline
The nozzle core (503) of connection, the nozzle core (503) is engaged to the inside of the nozzle carrier (502), the nozzle core (503)
Jet be arranged on the center of its point diameter smaller portions, the centrally disposed nozzle pair with the nozzle carrier (502)
Standard, is communicated to the inside of the spray chamber (207) jointly；Or, the nozzle core (503) has multiple jets, and equidistantly
On the side wall for being arranged on the point diameter smaller portions of the nozzle core (503).
7. exhaust treatment system (100) according to claim 6, it is characterised in that also set in the spray chamber (207)
It is equipped with horn-shaped duct, it is that the horn-shaped duct extends by cylindrical duct and by described cylindrical duct one end, through expanding
The multiple conduit bars composition for forming horn-like conduit mouth is opened, the other end of the cylindrical duct connects with the nozzle carrier (502)
Connect.
8. exhaust treatment system (100) according to claim 6, it is characterised in that the air inlet pipe (203), which has, to be set
The first gas outlet and the second gas outlet in the nozzle carrier (502), the nozzle carrier (502) is led in first gas outlet
Inner chamber, connected with the nozzle；The spray chamber (207) is led in second gas outlet, with the combustion chamber (206) even
It is logical.
9. exhaust treatment system (100) according to claim 7, it is characterised in that in the spray chamber (207) and described
The air register of annular is additionally provided between horn-shaped duct, multiple passages are equidistantly provided with the air register.
10. exhaust treatment system (100) according to claim 4, it is characterised in that the institute in the combustion chamber (206)
Multiple inclined exhaust ingress pipes, the center line of the exhaust ingress pipe are equidistantly provided with the side wall for stating the first combustion chamber Taper Pipe
Angle with the center line formation of the shell body (201) is 30 degree to 60 degree.
11. exhaust treatment system (100) according to claim 10, it is characterised in that the center of the exhaust ingress pipe
The angle that the center line of line and the shell body (201) is formed is 35 degree, 40 degree, 45 degree, 50 degree or 55 degree.
12. exhaust treatment system (100) according to any one of claim 1 to 3, it is characterised in that the oil inlet pipe
(204) and/or the air inlet pipe (203) be located at the shell body (201) in a part be arranged to bending tube shape, band branch road
Manifold shapes or spiral disc tube shape, and the inner or outer side of the combustion chamber (206) port of export is arranged in, positioned at fire
On the path that flame sprays.
13. exhaust treatment system (100) according to claim 12, it is characterised in that the swan-neck be shaped as U-shaped,
The shape of semicircle or zigzag.
14. exhaust treatment system (100) according to any one of claim 1 to 3, it is characterised in that the shell body
(201) connecting tube being connected with the exhaust pipe mouth be in interior diameter gradual change cone shape so that the shell body (201) it is straight
The interior diameter of tube portion is more than the interior diameter of the exhaust pipe mouth.
15. exhaust treatment system (100) according to claim 1, it is characterised in that in the low temperature heating device (102)
Downstream be additionally provided with water conservancy diversion fan blade or flow spoiler (103).
16. exhaust treatment system (100) according to claim 1, it is characterised in that in the low temperature heating device (102)
Oxidation catalyst (104) is additionally provided between the particle trapper (105), for removing the hydrocarbon in exhaust
With partial particulate thing.
17. exhaust treatment system (100) according to claim 16, it is characterised in that the honeycomb ceramic filter mistake
Filter or the oxidation catalyst (104) are made up of cordierite, carborundum or recrystallized silicon carbide.
18. exhaust treatment system (100) according to claim 16, wherein before the oxidation catalyst (104)
It is provided with taper and mixes lid, the center line that the taper mixes lid is overlapped with the center line of the oxidation catalyst (104), its
The drift angle of conical cavity is 100 to 160 degree.
19. exhaust treatment system (100) according to claim 18, wherein, the drift angle of the conical cavity is 110
Degree, 120 degree, 130 degree, 140 degree, 145 degree or 150 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621138037.1U CN206571557U (en) | 2016-10-15 | 2016-10-15 | Exhaust treatment system for Diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621138037.1U CN206571557U (en) | 2016-10-15 | 2016-10-15 | Exhaust treatment system for Diesel engine |
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| Publication Number | Publication Date |
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| CN206571557U true CN206571557U (en) | 2017-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621138037.1U Expired - Fee Related CN206571557U (en) | 2016-10-15 | 2016-10-15 | Exhaust treatment system for Diesel engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107642391A (en) * | 2017-10-24 | 2018-01-30 | 天津亿科汽车电子有限公司 | A kind of integrated DPF hot recyclings and the apparatus system of machinery regeneration |
| CN112963225A (en) * | 2021-03-25 | 2021-06-15 | 一汽解放汽车有限公司 | Tail gas heating device and tail gas treatment system |
-
2016
- 2016-10-15 CN CN201621138037.1U patent/CN206571557U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107642391A (en) * | 2017-10-24 | 2018-01-30 | 天津亿科汽车电子有限公司 | A kind of integrated DPF hot recyclings and the apparatus system of machinery regeneration |
| CN107642391B (en) * | 2017-10-24 | 2023-09-22 | 天津亿科汽车电子有限公司 | Device system integrating DPF thermal regeneration and mechanical regeneration |
| CN112963225A (en) * | 2021-03-25 | 2021-06-15 | 一汽解放汽车有限公司 | Tail gas heating device and tail gas treatment system |
| CN112963225B (en) * | 2021-03-25 | 2023-02-17 | 一汽解放汽车有限公司 | Tail gas heating device and tail gas treatment system |
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| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 556000 the first industrial park of Kaili Economic Development Zone, Qiandongnan Miao and Dong Autonomous Prefecture, Guizhou Patentee after: GUIZHOU HUANGDI DIESEL ENGINE CLEANER CO.,LTD. Address before: 556000 the first industrial park of Kaili Economic Development Zone, Qiandongnan Miao and Dong Autonomous Prefecture, Guizhou Patentee before: GUIZHOU HUANGDI DIESEL ENGINE CLEANER Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171020 Termination date: 20211015 |