CN208396779U - Diesel emission processing system - Google Patents
Diesel emission processing system Download PDFInfo
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- CN208396779U CN208396779U CN201820852636.2U CN201820852636U CN208396779U CN 208396779 U CN208396779 U CN 208396779U CN 201820852636 U CN201820852636 U CN 201820852636U CN 208396779 U CN208396779 U CN 208396779U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The utility model discloses a kind of diesel emission processing systems.The diesel emission processing system includes: turbocharger；Oxidizing catalytic converter, import are connect with the outlet of the turbine of the turbocharger；Grain catcher, inlet end are connect with the outlet of the oxidizing catalytic converter；The both ends of the grain catcher are connected with differential pressure pickup；And selective catalytic reduction system operating, comprising: exhaust pipe, catalytic muffler, NOxSensor adds blue tank, compressed air assisted injection system, adds cyan nozzle, aftertreatment control unit ACU and cooling liquid electromagnetic valve.The cost of parts of the diesel emission processing system is low, oil consumption is few, transient response performance is good, durability is high, can satisfy the emission level of vehicle device state 6, non-rice habitats and ship machine T4.
Description
Technical field
The utility model relates to engine art, in particular to a kind of diesel emission processing system.
Background technique
State Ministry of Environmental Protection has promulgated " automobile-used compression-ignited, gaseous fuel spark-ignition engine and automobile exhaust pollutant discharge
Limit value and measurement method (Chinese 6th stage) exposure draft ", " opinion original text " proposes, all discontented from the year two thousand twenty January 1
The new car that sufficient this standard requires must not be produced and sold, register, the new engine for being unsatisfactory for this standard requirement must not produce,
It sells and comes into operation.To meet most tight six emission regulation of state in the whole world, Chinese Automobile Industry ' and ic engine industry must reach
International most advanced level, domestic original light diesel machine platform are difficult to meet six emission regulation of state by upgrading again, re-start
Design, the exploitation of energy saving and environment friendly six diesel engine of state are imperative, and non-rice habitats T4 also must be developed quickly.
Therefore, diesel technology development faces discharge and energy saving dual-pressure, and constantly stringent regulation is diesel engine progress
Important driving force, meet at present country and Europe emission regulation, there is presently no meet vehicle device state 6, non-rice habitats and ship machine
The technology path of the emission level of T4.
The information disclosed in the background technology section is intended only to increase the understanding to the general background of the utility model, and
It is not construed as recognizing or implying in any form that information composition is already known to those of ordinary skill in the art existing
Technology.
Utility model content
The purpose of this utility model is to provide a kind of simple and reasonable diesel emission processing systems, to overcome
Existing diesel discharge treating system is unable to satisfy the shortcomings that emission level of vehicle device state 6, non-rice habitats and ship machine T4.
To achieve the above object, the utility model provides a kind of diesel emission processing system, comprising: turbocharging
Device, comprising: turbine and the impeller coaxial with the turbine；It is provided between the outlet and air inlet pipe of the impeller of the turbocharger
Intercooler and air throttle；Oxidizing catalytic converter, import are connect with the outlet of the turbine of the turbocharger；Particle is caught
Storage, inlet end are connect with the outlet of the oxidizing catalytic converter；The both ends of the grain catcher are connected with pressure difference
Sensor；And selective catalytic reduction system operating, comprising: exhaust pipe, catalytic muffler, NOxSensor adds blue tank, compression sky
Gas assisted injection system adds cyan nozzle, aftertreatment control unit ACU and cooling liquid electromagnetic valve；The exhaust pipe and diesel engine
Grain catcher connection, the catalytic muffler is connected with the exhaust pipe, the catalytic muffler include SCR catalyst with
Engine exhaust muffler, the arrival end of the catalytic muffler and outlet end are respectively arranged with temperature sensor；The NOxIt passes
The outlet end of the catalytic muffler is arranged in sensor；It is described add blue tank and be equipped with add blue pump, sensor and heater；The pressure
Contracting air assisted injection system adds blue tank and connect with described；It is described add cyan nozzle be arranged on the exhaust pipe, and with the meter
Measure jet pump connection；The aftertreatment control unit ACU and the metering ejector pump communicate to connect, for controlling the metering pump
It works with the compressed air electromagnetic valve according to preset program.
Preferably, in above-mentioned technical proposal, the integral material of catalytic muffler is stainless steel, is provided with SCR catalyst core
Son and noise elimination pipeline.
Preferably, in above-mentioned technical proposal, catalytic muffler selects tub catalytic muffler, the temperature sensor difference
It is set on the cylindrical surface of arrival end and outlet end.
Preferably, in above-mentioned technical proposal, compressed air assisted injection system includes metering ejector pump, the metered injection
Pump is integrated with metering pump and compressed air electromagnetic valve.
Compared with prior art, the utility model has the following beneficial effects: the part of the diesel emission processing system
It is at low cost, oil consumption is few, transient response performance is good, durability is high, can satisfy the discharge water of vehicle device state 6, non-rice habitats and ship machine T4
It is flat.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the diesel emission processing system of the utility model.
Fig. 2 is the NO of the diesel emission processing system of the utility modelXScheme than discharge.
Specific embodiment
With reference to the accompanying drawing, specific embodiment of the present utility model is described in detail, it is to be understood that this is practical
Novel protection scope is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
As shown in Figure 1, according to the specific structure packet of the diesel emission processing system of specific embodiment of the present invention
It includes: turbocharger 1, oxidizing catalytic converter 2, grain catcher 3 and selective catalytic reduction system operating 4.Wherein, turbine increases
Depressor 1, oxidizing catalytic converter 2, grain catcher 3 and selective catalytic reduction system operating 4 are sequentially connected with, so that diesel engine is arranged
Put that processing system cost of parts is low, oil consumption is few, transient response performance is good, durability is high, can satisfy vehicle device state 6, non-rice habitats and
The emission level of ship machine T4.
Specifically, turbocharger 1 includes: turbine and the impeller coaxial with the turbine, it is discharged using engine
Exhaust gas inertia push turbine, the air that turbine drives coaxial wheel compresses to be sent by air cleaner pipeline again makes air
Enter cylinder after pressurization.When engine speed improves, the exhaust gas velocity of discharge is just compressed more with secondary speed also synchronous raising, impeller
More air enters cylinder, and the pressure and density of air increase more fuel oils that can burn, increase accordingly oil mass and adjustment one
The revolving speed of lower engine, so that it may increase the output power of engine.
Preferably, intercooler 5 and air throttle 6, temperature are provided between the outlet and air inlet pipe of the impeller of turbocharger 1
Increase, not only influence volumetric efficiency in this way, is also easy to generate detonation.Therefore the equipment for wanting device to reduce intake air temperature, here it is
Intercooler 5 (intercooler) cools down the air for entering cylinder.Intercooler as radiator, with air cooling or
Person's water is cooling, and the heat of air is spilt into atmosphere by cooling.According to test, intercooler of good performance not only may be used
So that engine compression ratio is able to maintain certain value without generating detonation, while reducing temperature and admission pressure also can be improved, into one
Step improves the effective power of engine.Air throttle 6 is used to adjust the air inflow of air inlet pipe.
Oxidizing catalytic converter 2 is diesel oxidation catalyst (abbreviation DOC), and import and turbine increase
The outlet of the turbine of depressor 1 connects, and is mounted in diesel car engine exhaust system, by catalytic oxidation, can reduce
In exhaust in carbon monoxide (CO), total hydrocarbon (THC) and particulate matter (PM) after the exhaust of pollutant discharge amounts such as SOF
Manage device.For the DOC of POC system, main function is to convert NO2 for the NO in exhaust.
Grain catcher 3 is diesel particle dilter (abbreviation DPF), inlet end and oxidized form catalyzed conversion
The outlet of device 2 connects, and grain catcher 3 generally uses carrier cordierite ceramic, has the section being much parallel to each other to be on carrier
The channel of square, the adjacency channel end of DPF interlock plug-hole, and ceramic channel wall is covered with micropore, diesel exhaust gas air-flow from
The channel of bottom plug-hole enters, and the adjacency channel of front plug-hole can only be flowed to from channel wall micropore, the particulate matter in exhaust exists
It is filtered down under the effects of diffusional deposition, absorption, interception by conduit wall.The filtered model of new DPF is in-depth filtration, a part
Particle can enter the micropore inside wall surface, and DPF resistance is rapid, and it is lower 60~85% or so to increase filter efficiency at this time, with
Particulate accumulation, wall surface celled portion are filled, and filter efficiency gradually increases, after passage wall surface forms one layer of soot, filtering effect
Rate increases to 90% or so, and with the progressive additive of soot layer, DPF resistance is gradually increased.
Preferably, the both ends of grain catcher 3 are connected with differential pressure pickup 8.
Oxidizing catalytic converter 2 and grain catcher 3 form the processing system of interaction, and DOC is coated with oxidation and urges
Agent, main function are that the NO in engine exhaust is oxidized to NO2, what NO2 can be intercepted at 250 DEG C or more with DPF
Soot in particle carries out low-temperature oxidation reaction, and reaction speed is accelerated as the temperature rises, and 300~350 DEG C can reach most
Height, here it is the passive regeneration of DPF, DPF coating generates NO2, aoxidizes soot, two sides in the position of stratum granulosum contact DPF wall surface
One reacts, to strengthen passive regeneration.In addition diesel engine Part load delivery temperature reaches 400~500 DEG C, the carbon in particle
Directly with the O2 in exhaust slow oxidative reaction can occur for cigarette, this also belongs to passive regeneration.In addition, the initiative regeneration principle of DPF
It is when carbon carrying capacity reaches high value in DPF, commercial vehicle is generally 4~5g/L, and exhaust resistance, which increases to, to be enough to influence engine
Oil consumption, the fuel injector that control is mounted on exhaust pipe by engine controller spray diesel oil, and diesel oil resolves into HC, the oxygen at DOC
Change burning, DPF inlet temperature is increased to 600~650 DEG C, and the soot that DPF is intercepted is burned rapidly removal.
If engine Nox discharge and soot emissions ratio are more than 25, in the suitable situation of temperature, passive regeneration removal
Soot and the soot of engine discharge can reach balance.It adopts a series of measures, as engine original row Nox and soot ratio are more than
100, exhaust heat management etc. strengthens passive regeneration, can reach only with passive regeneration, under public transport cycling condition, DPF carbon is carried
Amount maintains 3g/L hereinafter, resistance maintains the level for not influencing oil consumption, so that DPF is not required to initiative regeneration.
The condition (protection point) of passive regeneration:
Original row NOx/soot > 25 (range 20-25)；
Row's temperature > 250 DEG C wants > 60% (or 210 DEG C want 40%).
(SCR is that Selective (selectivity), Catalytic (are urged to 4 abbreviation SCR system of selective catalytic reduction system operating
Change), the english abbreviation of Reduction (reduction)), its working principle is that spray reductant into exhaust pipe, the nitrogen oxidation in exhaust
It closes object to react under the action of catalyst converter with reducing agent and be reduced into nitrogen and water, the currently used reducing agent of SCR system is
Urea.Urea NH2CONH2Add H2NH is resolved into after O at high temperature3And CO2:
NH2CONH2+H2O-=2NH3+CO2
NH3Again with the NO and NO in exhaust2Reaction generates nitrogen and water:
NO+NO2+2NH3=2N2+3H2O
4NO+O2+4NH3=4N2+6H2O
2NO2+O2+4NH3=3N2+6H2O
The leakage of engine ammonia during entire service life in order to prevent is equipped with ammonia catalyst converter after SCR catalyst,
The NH in this catalyst converter3With O2Reaction generates nitrogen and water:
4NH3+3O2=2N2+6H2O
Wherein, the standardization aqueous solution of urea of SCR system is known as adding indigo plant.
Selective catalytic reduction system operating 4 includes: exhaust pipe, catalytic muffler, NOxSensor, to add blue tank, compressed air auxiliary
Help that spraying system, to add cyan nozzle, aftertreatment control unit ACU, cooling liquid electromagnetic valve and corresponding pipeline (blue tube road, cold
But liquid pipeline) and harness.
Wherein, the grain catcher 3 of exhaust pipe and diesel engine connects, for receiving the exhaust gas from engine.Catalysis disappears
Sound device is connected with exhaust pipe, for restoring the nitrogen oxides in the exhaust gas and reducing the exhaust noise of the engine,
The catalytic muffler includes SCR catalyst and engine exhaust muffler, the arrival end of the catalytic muffler and outlet end
It is respectively arranged with a temperature sensor.The integral material of catalytic muffler is stainless steel, is provided with SCR catalyst fuse and disappears
Sound pipe road, the lower part of surface layer stainless steel material are insulating materials.It should be understood that general insulating materials in the prior art
It may be used as the insulating materials of the utility model.The surface of the catalytic muffler catalytic muffler in the process of running is average
Temperature is lower than 200 DEG C.The arrival end of catalytic muffler is flange face interface, and outlet end is light pipe interface, and the utility model is urged
Tub catalytic muffler can be selected by changing silencer, and temperature sensor is respectively arranged on the cylindrical surface of arrival end and outlet end.
NOxSensor is set to the outlet end of catalytic muffler, for measuring the NO in the exhaust gas after catalytic muffler reactsxAt
The concentration divided, concentration signal are used to add the closed-loop control and OBD function of blue injection.
Add blue tank for containing aqueous solution of urea, add blue tank and be equipped with and add blue pump, sensor and heater, wherein the sensing
Device is liquid level, liquid temperature sensor, for incuding the liquid level and temperature that add aqueous solution of urea in blue tank.Heater can use
The heat of engine coolant changes ice.The material for adding blue tank is plastics, adds being internally provided with for blue tank and adds blue coarse filter, is used for
Prevent bulky grain of the diameter greater than 0.1mm from entering in system.Add blue tank and be additionally provided with breather valve, for gas pressure inside and outside compensator
Power.In addition, the bottom for adding blue tank, which is provided with raffinate, releases spiro pluging hole, for releasing liquid remaining in tank.
Compressed air assisted injection system 7 is connect by blue tube road with blue tank is added, and compressed air assisted injection system 7 is wrapped
Include metering ejector pump, compressed air hose and air cleaner.Wherein, metering ejector pump is integrated with metering pump, compressed air electromagnetism
Valve and heater.Metering ejector pump tool is there are four liquid/air connector and two electrical apparatus interfaces, and liquid/air connector is from top
Clockwise successively are as follows: compressed air inlet, nozzle interface add blue entrance, add blue liquid return hole.Two electrical apparatus interfaces are as follows: compression is empty
Gas electromagnetism needle electrical connector and the main electrical connector of 37 needles, wherein the main electrical connector of 37 needles includes battery feed interface, igniting
Switch, air solenoid valve positive and negative anodes and J1939 is high and low and shield terminal.Metering ejector pump can control internal heater automatic
Heating, to prevent the aqueous solution of urea added in blue tank from freezing.Compressed air hose is for being passed through compressed air, to carry metering
Aqueous solution of urea afterwards is to cyan nozzle is added, so that aqueous solution of urea is added cyan nozzle and is sufficiently atomized ejection.Air cleaner is to use
Come the particle and impurity of filtering compressed air.
Add cyan nozzle to be arranged on the exhaust pipe, and connect with metering ejector pump by blue tube road, by will based on
The aqueous solution of urea that amount jet pump is sent mixes with air object uniform atomizing and fair current sprays into exhaust pipe；Adding cyan nozzle is not
The injector of rust Steel material.
Aftertreatment control unit ACU is an independent electronic control unit, for controlling metering pump and compressed air electromagnetic valve
It works according to preset program, so that the amount of injection of aqueous solution of urea is accurately calculated, aftertreatment control unit ACU being also used to ice control
The realization of system, temperature sensor and liquid level, the signal processing of liquid temperature sensor and OBD function.Aftertreatment control unit ACU is logical
CAN bus and Engine ECU communication connection are crossed, the running state data and two temperature sensing to the engine are passed through
The electric signal of device is calculated, and according to the various pulses demarcated in advance, in the case of in time calculating engine real work
Aqueous solution of urea the amount of injection, and then by CAN bus control metering ejector pump the amount of injection so that in exhaust gas
NOxIngredient is by precise restoration.
Aftertreatment control unit ACU has the function of fault self-diagnosis and OBD, when normal operation, can hear after opening key
The very brief sound issued when pump operating, at this moment motor returns to " STOP " position；When the engine is started, pump enters the " row of starting
It is empty " mode, aqueous solution of urea is pumped by pump with maximum stream flow, then is returned to by adding blue liquid return hole and add blue tank, progress lasting in this way
Half a minute, then internal controller opens compressed air electromagnetic valve, if compressed air pressure is normal and " starting emptying " mould
When formula successfully completes, metering ejector pump will enter metered injection mode, be controlled according to the order that aftertreatment control unit ACU is issued
The amount of injection of aqueous solution of urea, if delivery temperature is lower than 200 DEG C, aqueous solution of urea the amount of injection is zero, and compressed air is persistently sprayed
It penetrates.After starting key-off, pump automatically begins to purge, and compressed air continues injection 30 seconds, is swept with pump residual in nozzle pipeline
Liquid avoids causing pipeline blockage because aqueous solution of urea crystallizes.
Cooling liquid electromagnetic valve is connected by coolant line with the heat exchanger for adding blue tank and adding built in blue pump, for be
System offerization ice service.Change ice control specifically: when aftertreatment control unit ACU is by adding liquid level, the temperature sensor of blue tank
When sensing that the temperature of aqueous solution of urea is lower than to a certain degree, judge that system freezes, is powered opens cooling liquid electromagnetic valve at this time.
Engine coolant after heating, which will flow to add blue tank and add indigo plant along coolant line, pumps built-in heat exchanger, these places
Ice will melt rapidly.Since coolant line and blue tube road band together, and outside is cased with insulating tube, so adding indigo plant
The ice of channel interior can also melt simultaneously.
As shown in Fig. 2, the diesel emission processing system belongs to no EGR technology discharge course: low carbon-smoke combustion skill in cylinder
Art (explosion pressure is greater than 200bar in cylinder)+high-pressure common rail technology (injection pressure is smaller than 1800bar)+booster+DOC+DPF
+ SCR (transformation efficiency is greater than 97%).
To sum up, the cost of parts of the diesel emission processing system is low, oil consumption is few, transient response performance is good, durability is high,
It can satisfy the emission level of vehicle device state 6, non-rice habitats and ship machine T4.
The description of the aforementioned specific exemplary embodiment to the utility model is in order to illustrate and illustration purpose.These
Description is not wishing to for the utility model to be limited to disclosed precise forms, and it will be apparent that according to the above instruction, can carry out
It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the utility model
And its practical application, so that those skilled in the art can be realized and utilize a variety of different examples of the utility model
Property embodiment and various chooses and changes.The scope of the utility model is intended to by claims and its waits similar shapes
Formula is limited.
Claims (4)
1. a kind of diesel emission processing system characterized by comprising
Turbocharger comprising: turbine and the impeller coaxial with the turbine；The outlet of the impeller of the turbocharger with into
Intercooler and air throttle are provided between tracheae；
Oxidizing catalytic converter, import are connect with the outlet of the turbine of the turbocharger；
Grain catcher, inlet end are connect with the outlet of the oxidizing catalytic converter；The both ends of the grain catcher
It is connected with differential pressure pickup；And
Selective catalytic reduction system operating comprising: exhaust pipe, catalytic muffler, NOxSensor adds blue tank, compressed air auxiliary
Spraying system adds cyan nozzle, aftertreatment control unit ACU and cooling liquid electromagnetic valve；The particle of the exhaust pipe and diesel engine is caught
Storage connection, the catalytic muffler are connected with the exhaust pipe, and the catalytic muffler includes SCR catalyst and engine
Exhaust silencer, the arrival end of the catalytic muffler and outlet end are respectively arranged with temperature sensor；The NOxSensor is set
It sets in the outlet end of the catalytic muffler；It is described add blue tank and be equipped with add blue pump, sensor and heater；The compressed air
Assisted injection system adds blue tank and connect with described；The cyan nozzle that adds is arranged on the exhaust pipe, and connects with metering ejector pump
It connects；The aftertreatment control unit ACU and the metering ejector pump communicate to connect, for controlling the metering ejector pump and described
Compressed air electromagnetic valve works according to preset program.
2. diesel emission processing system according to claim 1, which is characterized in that the whole material of the catalytic muffler
Material is stainless steel, is provided with SCR catalyst fuse and noise elimination pipeline.
3. diesel emission processing system according to claim 2, which is characterized in that the catalytic muffler selects tub
Catalytic muffler, the temperature sensor are respectively arranged on the cylindrical surface of arrival end and outlet end.
4. diesel emission processing system according to claim 1, which is characterized in that the compressed air assisted injection system
System includes metering ejector pump, and the metering ejector pump is integrated with metering pump and compressed air electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820852636.2U CN208396779U (en) | 2018-06-04 | 2018-06-04 | Diesel emission processing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820852636.2U CN208396779U (en) | 2018-06-04 | 2018-06-04 | Diesel emission processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757108A (en) * | 2018-06-04 | 2018-11-06 | 广西玉柴机器股份有限公司 | Diesel emission processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757108A (en) * | 2018-06-04 | 2018-11-06 | 广西玉柴机器股份有限公司 | Diesel emission processing system |
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