CN106437948A - DPF regenerating system and control method - Google Patents
DPF regenerating system and control method Download PDFInfo
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- CN106437948A CN106437948A CN201610936157.4A CN201610936157A CN106437948A CN 106437948 A CN106437948 A CN 106437948A CN 201610936157 A CN201610936157 A CN 201610936157A CN 106437948 A CN106437948 A CN 106437948A
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- dpf
- regeneration
- ntp
- control valve
- control module
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0231—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/029—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles by adding non-fuel substances to exhaust
- F01N3/0293—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles by adding non-fuel substances to exhaust injecting substances in exhaust stream
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention provides a DPF regenerating system and a control method. The system mainly comprises an NTP injection system, a double-DPF system, a heat-to-electricity conversion device and a control module. Air is used as an air source of the NTP injection system, an NTP generator discharges to generate active substances, and the active substances are sprayed out via a nozzle mounted at the front end of each DPF, and enter each DPF to be regenerated. The double-DPF system comprises two DPFs which are connected in parallel, and a diesel engine can run normally during on-line alternate DPF regeneration of the NTP injection system. The heat-to-electricity conversion device controls the temperature of the DPFs by using electric heating layers which wrap DPF shells, so that the DPFs are at optimal regeneration temperature. The NTP injection system, the double-DPF system and the heat-to-electricity conversion device are connected with the control module. In a running state of the diesel engine, on-line real-time DPF regeneration can be realized, and the problem that NTP utilization rate is reduced due to over large exhaust flow is solved effectively.
Description
Technical field
The present invention relates to diesel engine vent gas post-processing technology field, in particular it relates to a kind of dpf regeneration system and controlling party
Method.
Background technology
Diesel engine extensively should by its fuel economy is good, reliability is high, the thermal efficiency is high and the advantage such as long service life
For fields such as transportation and industrial and agricultural productions.The primary discharge pollutant of diesel engine are nitrogen oxides NOXAnd particulate matter
(Particulate matter, abbreviation PM), especially PM, serious harm is to human health.In recent years, increasingly strict discharge
Regulation is put forward higher requirement to diesel PM emissions.Diesel particulate trap (Diesel particulate
Filter, abbreviation DPF) technology is considered as to reduce the maximally efficient post processing means of PM at present, arresting efficiency up to 90% with
On.However as continuous trapping of the DPF to PM in aerofluxuss, DPF can be blocked, so as to cause the rising of diesel exhaust gas back pressure, property
The consequence such as energy decline and oil consumption increase, so the PM, the i.e. DPF that it is critical only that in time removing DPF absorption of DPF technology are again
Raw.
Traditional dpf regeneration mode is broadly divided into initiative regeneration and passive regeneration.Initiative regeneration include oil spout thermal regeneration,
Electrical heating regeneration, microwave heating regeneration and Infrared Heating regeneration etc. hot recycling mode.Hot in-place recycling is mainly using external energy
Heating makes the PM burn off for depositing on DPF, and reaction temperature is typically up to more than 600 DEG C, and carrier is easily damaged because of hot-spot.Quilt
Dynamic regeneration mainly includes catalytic regeneration and cyclic regeneration.Compared to hot recycling, the catalytic regeneration technology of catalyst and continuous is installed additional
Regeneration techniques can be greatly reduced the reaction temperature of PM, but catalyst keeps the temperature range of activity narrower, oil product be required higher.
Itself all there is shortcoming in therefore traditional dpf regeneration mode, using on be subject to a definite limitation.
Low temperature plasma (Non-thermal plasma, abbreviation NTP) technology Pollutant Treatment field have efficiently,
Process range is wide, purification can process thoroughly and simultaneously the advantages such as multiple pollutant, becomes current purifying internal combustion engine tail gas field
Study hotspot, with great application prospect.NTP generator produces O by carrying out electrion to air source of the gas3、NO2Deng strong
The active substance of oxidisability.The essence of NTP regeneration DPF technology is the O which produces3、NO2The PM for depositing in isoreactivity material and DPF
There is complicated chemical reaction, the oxidation Decomposition of PM is realized in the case of PM initiation temperature is far below, reaches the mesh for removing PM
's.At present, Emissions are reduced achieved with certain achievement in research using NTP technology.Chinese Publication No.
A kind of using NTP technology regeneration DPF's under diesel engine stop state described in the Chinese patent application of CN102678238A
Method, the method makes DPF reach regeneration temperature optionally by diesel engine exhaust waste heat and electrical heating, realizes the offline of DPF
Regeneration.But the defect of the method is：Can not regenerated in real time DPF online, the long playing DPF system of diesel engine is failed
Effective on-line regeneration strategy is provided.The Chinese patent application of Chinese Publication No. CN105221220A provides a kind of utilization
NTP technology carries out the regeneration strategy that on-line regeneration and regenerated offline combine to DPF, and the strategy can be real-time when diesel engine runs
Regeneration DPF, and DPF is periodically regenerated completely.But the defect of the method is：During on-line regeneration, extraction flow is much larger than
NTP flow, the method fails to solve the problems, such as that the NTP utilization rate for thus causing declines and regeneration efficiency is low.
Content of the invention
For Shortcomings in prior art, the invention provides a kind of dpf regeneration system and control method, using online
Double DPF system, using NTP spraying system and thermo-electric converting device, are carried out by the regeneration strategy that regeneration and regenerated offline combine
Online alternately regenerate, NTP utilization rate when drastically increasing on-line regeneration and regeneration efficiency.
The present invention is to realize above-mentioned technical purpose by following technological means.
A kind of dpf regeneration system, including NTP spraying system, double DPF system and control module；The NTP spraying system bag
Include NTP generator, supply blower fan, mass flow controller, oscillograph, power supply, injection line, nozzle；The supply blower fan leads to
Cross the pipeline equipped with mass flow controller to be connected with the inlet end of NTP generator, the outlet side of the NTP generator is by spray
Penetrate pipeline to be connected with nozzle, the injection line back segment is divided into two injection branch roads, is respectively mounted on described two injection branch roads
There are a NTP control valve and the 2nd NTP control valve, the injection branch road end connection first jet of a NTP control valve be installed,
The injection branch road end connection second nozzle of the 2nd NTP control valve is installed；
Described pair of DPF system includes a DPF and the 2nd DPF, a DPF and the 2nd DPF by exhaust branch simultaneously
Connection connection, is provided with first exhaust control valve, the exhaust branch of a DPF on the front end exhaust branch of a DPF
On the first differential pressure pickup is installed；On the exhaust branch of the 2nd DPF front end, second exhaust control valve is installed, described second
Second differential pressure pickup is installed on the exhaust branch of DPF；
First jet and second nozzle in the NTP spraying system is respectively arranged in the entrance of a DPF and the 2nd DPF
Place, a NTP control valve, the 2nd NTP control valve, first exhaust control valve, second exhaust control valve, the first pressure difference sensing
Device, the second differential pressure pickup are all connected with control module.
Prestore in the control module DPF pressure reduction upper limit threshold Δ Pc, the mark target differential pressure Δ P that completes of dpf regeneration0, and
Pressure differential deltap P by the first DPF two ends of differential pressure pickup Real-time Collection1And/or the 2nd DPF two ends pressure differential deltap P2, according to prestoring
DPF pressure reduction upper limit threshold Δ PcAnd pressure differential deltap P at DPF two ends of real-time detection1And/or the 2nd DPF two ends pressure differential deltap
P2Judge whether to need to carry out dpf regeneration；And by controlling a NTP control valve, the 2nd NTP control valve, first exhaust control
A DPF and/or the 2nd DPF are realized in valve, the opening and closing of second exhaust control valve and the open and close of NTP spraying system to be carried out
On-line regeneration or shutdown regeneration.
Preferably, a DPF, the downstream of the 2nd DPF are also separately installed with the first temperature sensor, second temperature and pass
Sensor, is wrapped in, on a DPF and the 2nd DPF shell, the first electric heating layer and the second electrical heating being connected with power supply respectively
Layer, first temperature sensor, second temperature sensor are all connected with control module；
The optimum temperature range T of regeneration is prestored in the control modulef～Tc, always according to first in the control module
Temperature T of DPF1, the 2nd DPF temperature T2, when carrying out on-line regeneration or regeneration being shut down, control T1And/or T2In regeneration
Optimum temperature range Tf～TcInterior.
Preferably, also include thermo-electric converting device, the thermo-electric converting device is installed on the front end exhaustor of double DPF system
Lu Shang, is that the first electric heating layer and the second electric heating layer provide electric energy.
Preferably, the front end of the installation site of the first jet and second nozzle distance the first DPF and the 2nd DPF respectively
Face 100mm.
Preferably, the NTP spraying system adopts cooling by water system, and cooling water is entered in NTP generator by water inlet
Portion is simultaneously discharged through outlet；The voltage of the power supply of the NTP spraying system and frequency are all adjustable.
Preferably, the NTP generator be dielectric barrier discharge type, including thin wire gauze external electrode, quartz ampoule and stainless
Electrode in steel pipe；The thin wire gauze external electrode is wrapped in quartzy pipe outer wall, and in the stainless steel tube, electrode is installed on quartz ampoule
Inside, in the stainless steel tube, between electrode and quartz ampoule, Formation cross-section is the discharging gap of annular, the thin wire gauze dispatch from foreign news agency
Extremely region of discharge.
Preferably, first electric heating layer and the second electric heating layer provide electricity in diesel engine stop by Vehicular accumulator cell
Power.
The dpf regeneration control method of described dpf regeneration system, comprises the steps：
Step one：Rating test is carried out to double DPF system, determines diesel engine under different operating modes on corresponding DPF pressure reduction
Limit threshold value Δ Pc, identify the regeneration target differential pressure Δ P that dpf regeneration is completed0；By pressure reduction upper limit threshold Δ Pc, regeneration target differential pressure Δ
P0It is stored in control module；
Step 2：Control module monitors a DPF and the 2nd DPF by the first differential pressure pickup and the second differential pressure pickup
The magnitude of pressure differential Δ P of front and back end1With Δ P2, with the pressure reduction upper limit threshold Δ P that prestores in control modulecIt is compared, to judge to be
No needs are regenerated；
When control module monitors DPF front and back end pressure differential deltap P1More than pressure reduction upper limit threshold Δ Pc and before the 2nd DPF
Rear end pressure differential deltap P2Less than pressure reduction upper limit threshold Δ Pc, that is, think that a DPF needs to be regenerated；If now second exhaust control
Valve is closed, then open second exhaust control valve, judge again；If now second exhaust control valve is in unlatching shape
State, then close first exhaust control valve, carry out on-line regeneration, and control module sends signal and opens NTP spraying system, opens first
NTP control valve, active gasess are sprayed into from a DPF front end, and a DPF is regenerated；Control module monitors a DPF
Front and back end pressure differential deltap P1Less than regeneration target differential pressure Δ P0When, that is, think that regeneration is completed；Control module sends signal-off first
NTP control valve, opens first exhaust control valve, closes NTP spraying system；
When control module monitors the 2nd DPF front and back end pressure differential deltap P2More than pressure reduction upper limit threshold Δ PcAnd the first before and after DPF
End pressure differential deltap P1Less than pressure reduction upper limit threshold Δ Pc, that is, think that the 2nd DPF needs to be regenerated；If now first exhaust control valve
It is closed, then first exhaust control valve is opened, is judged again；If now first exhaust control valve is in opening,
Then second exhaust control valve is closed, on-line regeneration is carried out, control module sends signal and NTP spraying system is opened, and opens the 2nd NTP
Control valve, active gasess are sprayed into from the 2nd DPF front end, and the 2nd DPF is regenerated；Before control module monitors the 2nd DPF
Rear end pressure differential deltap P2Less than regeneration target differential pressure Δ P0When, that is, think that regeneration is completed；Control module sends the 2nd NTP of signal-off
Control valve, opens second exhaust control valve, closes NTP spraying system；
When control module monitors that a DPF and the 2nd DPF front and back end pressure reduction are all higher than pressure reduction upper limit threshold Δ Pc, that is, recognize
It is required to be regenerated for both；Now for ensureing smooth gas discharge, control module control first exhaust control valve and second exhaust
Control valve keeps it turned on, waiting receive diesel engine stop signal, close first exhaust control valve and second exhaust control valve,
Shutdown regeneration is carried out, control module sends signal and NTP spraying system is opened, and a NTP control valve, the 2nd NTP control valve is opened,
Active gasess are sprayed into a DPF front end, the 2nd DPF respectively, a DPF, the 2nd DPF are regenerated；When control module is supervised
Measure DPF front and back end pressure differential deltap P1, the 2nd DPF front and back end pressure differential deltap P2Target differential pressure Δ P is respectively less than regenerated0When, that is, think
Regeneration is completed；Control module sends the first NTP control valve of signal-off, the 2nd NTP control valve, open first exhaust control valve and
Second exhaust control valve, closes NTP spraying system.
Preferably, also include in the step one optimal with the internal carbon distribution reaction of DPF by testing determination active gasess
Temperature range, obtains optimal regeneration temperature higher limit TcAnd optimal regeneration temperature lower limit Tf, and by optimal regeneration temperature higher limit
TcAnd optimal regeneration temperature lower limit TfIt is stored in control module；When carrying out on-line regeneration and shutting down regeneration, that is, begin through
Dpf temperature Sensor monitoring corresponds to the temperature drop trend of DPF, to judge whether to reach regeneration opportunity；When control module is monitored
To T1And/or T2Less than optimal regeneration temperature higher limit TcWhen, regeneration is proceeded by, during regeneration, works as T1And/or T2Little
In optimal regeneration temperature lower limit TfWhen, control module starts the first electric heating layer and/or the second electric heating layer heats a DPF
And/or the 2nd DPF, so that a DPF and/or the second dpf temperature is maintained in optimal regeneration temperature range；First after the completion of regeneration
Electric heating layer and/or the second electric heating layer stop heating.
Preferably, it is 10L/min that control module adjusts air demand by mass flow controller；NTP spraying system power supply
Voltage is 17～20kV, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～10kHz, and discharge frequency is 7～.
Beneficial effects of the present invention：1) double DPF system can be carried out with alternately regeneration in diesel engine running, solves
The excessive problem for causing NTP utilization rate to decline of extraction flow in on-line regeneration；2) thermo-electric converting device energy effective control DPF temperature
Degree is in optimal regeneration temperature range, and without the need for additional power source in diesel engine running.
All dpf regeneration processes are all carried out after corresponding gas exhausting valve is closed, it is to avoid extraction flow is excessive and shadow
Ring the reaction effect of the internal carbon distribution of NTP and DPF；All dpf regeneration processes are all carried out in optimal regeneration temperature range, pole
The earth improves the utilization rate of NTP；Therefore, the present invention improves revival using online with regeneration strategy that is combining offline
Rate has simultaneously been effectively saved the energy.
Description of the drawings
Fig. 1 is the structural representation of dpf regeneration system of the present invention.
Fig. 2 is the schematic diagram of NTP spraying system structure of the present invention.
Fig. 3 is the schematic diagram of the double DPF system for adding NTP spraying system and thermo-electric converting device of the present invention.
Fig. 4 is the illustrative steps schematic diagram of dpf regeneration control method of the present invention.
Wherein：
001：Diesel engine 002：Air filter 003：Air inlet pipeline
004：Gas exhaust piping 100：NTP spraying system 200：Double DPF system
300：Thermo-electric converting device 400：Control module 101：NTP generator
102：Supply blower fan 103：Mass flow controller 104：Inlet end
105：Outlet side 106：Thin wire gauze external electrode 107：Quartz ampoule
108：Electrode 109 in stainless steel tube：Oscillograph 110：Power supply
111：Generator water inlet 112：Generator outlet 113：Injection line
114：First NTP control valve 115：2nd NTP control valve 116：First jet
117：Second nozzle 201：First DPF 202：2nd DPF
203：First exhaust control valve 204：Second exhaust control valve 301：First electric heating layer
302：Second electric heating layer 401：First differential pressure pickup 402：Second differential pressure pickup
403：First temperature sensor 404：Second temperature sensor
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is simultaneously
Not limited to this.
As shown in figure 1, dpf regeneration system of the present invention includes NTP spraying system 100, double DPF system 200, thermoelectricity
Reforming unit 300 and control module 400, the thermo-electric converting device 300 is installed on 200 front end exhaustor of described pair of DPF system
Lu Shang, the NTP spraying system 100, double DPF system 200 and thermo-electric converting device 300 are all connected with the control module 400.
As shown in Fig. 2 the NTP spraying system 100 includes NTP generator 101, supply blower fan 102, mass flow control
Device 103, oscillograph 109, power supply 110, injection line 113, nozzle.The NTP generator 101 is dielectric barrier discharge type, bag
Include electrode 108 in thin wire gauze external electrode 106, quartz ampoule 107 and stainless steel tube；The thin wire gauze external electrode 106 is wrapped in
107 outer wall of quartz ampoule, in the stainless steel tube, electrode 108 is installed on inside quartz ampoule 107, electrode 108 in the stainless steel tube
Formation cross-section is the discharging gap of annular between quartz ampoule 107, and the thin wire gauze external electrode 106 is region of discharge.Described
Power supply 110 is used for providing triggering power supply to the NTP generator 101, and the oscillograph 109 is used for recording the power supply 110
Different electric discharge operating modes.
The supply blower fan 102 is by being equipped with the pipeline of mass flow controller 103 and the inlet end of NTP generator 101
104 connections, the outlet side 105 of the NTP generator 101 is connected with nozzle by injection line 113, the injection line 113
Back segment is divided into two injection branch roads, is separately installed with a NTP control valve 114 and the 2nd NTP control on described two injection branch roads
Valve processed 115, is provided with the injection branch road end connection first jet 116 of a NTP control valve 114, is provided with the 2nd NTP control
Valve 115 sprays branch road end connection second nozzle 117.NTP source of the gas enters discharging gap through inlet end 104, by region of discharge
Electric discharge forms NTP active gasess, and the active gasess enter the injection line 113 through NTP generator outlet side 105, by spraying
Mouth sprays the regeneration for participating in DPF.
As shown in figure 3, described pair of DPF system 200 includes a DPF 201 and the 2nd DPF 202, a DPF
201 and the 2nd DPF 202 be connected in parallel by exhaust branch, be provided with the front end exhaust branch of a DPF 201
One gas exhausting valve 203, is provided with the first differential pressure pickup 401 on the exhaust branch of a DPF 201, and described first
The downstream of DPF 201 is also equipped with the first temperature sensor 403；Is provided with 2nd DPF, 202 front end exhaust branch
Two gas exhausting valves 204, are provided with the second differential pressure pickup 402 on the exhaust branch of the 2nd DPF 202, and described second
The downstream of DPF 202 is also equipped with second temperature sensor 404；On first DPF 201 and 202 shell of the 2nd DPF respectively
The first electric heating layer 301 and the second electric heating layer 302 is wrapped in, the thermo-electric converting device 300 turns optionally by waste heat
The electric energy of change and accumulator are that the first electric heating layer 301 and the second electric heating layer 302 provide the energy, so that DPF is regenerated in optimal
Temperature.First electric heating layer 301 and the second electric heating layer 302 provide electric power in diesel engine stop by Vehicular accumulator cell.
First jet 116 and second nozzle 117 in the NTP spraying system 100 is respectively arranged in 201 He of a DPF
The porch of the 2nd DPF 202, the thermo-electric converting device 300 is installed on the front end gas exhaust piping of double DPF system 200, point
The front end face 100mm of other distance the first DPF 201 and the 2nd DPF 202；The first NTP control valve 114, the 2nd NTP control
Valve 115, first exhaust control valve 203, second exhaust control valve 204, the first differential pressure pickup 401, the second differential pressure pickup
402nd, the first temperature sensor 403, second temperature sensor 404 are all connected with control module 400.
The first NTP control valve 114 and the 2nd NTP control valve 115 are when NTP spraying system 100 is shut down all in pass
Closed state, the first exhaust control valve 203 and second exhaust control valve 204 are when diesel engine normally runs all in unlatching shape
State；The first exhaust control valve 203 is closed in 201 regenerative process of a DPF, the second exhaust control
Valve 203 is closed in 202 regenerative process of the 2nd DPF；The first exhaust control valve 203 and second exhaust control
Valve 204 can not be simultaneously closed off when diesel engine runs, when a DPF 201 and the 2nd DPF 202 reach regeneration requirements simultaneously,
First exhaust control valve 203 and second exhaust control valve 204 being kept while opening, after diesel engine stop, DPF being carried out offline
Regeneration.
The flow chart that Fig. 4 show dpf regeneration；Before the use, first have to carry out rating test to double DPF system 200,
Determine diesel engine corresponding DPF pressure reduction upper limit threshold Δ P under different operating modesc, identify the regeneration target differential pressure that dpf regeneration is completed
ΔP0；By the optimum temperature range for determining active gasess and the internal carbon distribution reaction of DPF is tested, the optimal regeneration temperature upper limit is obtained
Value TcAnd optimal regeneration temperature lower limit Tf.By pressure reduction upper limit threshold Δ Pc, regeneration target differential pressure Δ P0It is stored in control module 400.
By optimal regeneration temperature higher limit TcAnd optimal regeneration temperature lower limit TfIt is stored in control module 400.
Vehicle is once start, and control module 400 is monitored by the first differential pressure pickup 401 and the second differential pressure pickup 402
The first DPF 201 and magnitude of pressure differential Δ P of 202 front and back end of the 2nd DPF1With Δ P2, on the pressure reduction that prestores in control module 400
Limit threshold value Δ PcIt is compared, to judge whether that needs are regenerated；
When control module 400 monitors 201 front and back end pressure differential deltap P of a DPF1More than pressure reduction upper limit threshold Δ Pc and
Two DPF202 front and back end pressure differential deltap P2Less than pressure reduction upper limit threshold Δ Pc, that is, think that a DPF 201 needs to be regenerated；If this
When second exhaust control valve 204 be closed, then open second exhaust control valve 204, judge again；If now second row
Gas control valve 204 is in opening, then close first exhaust control valve 203, carry out on-line regeneration, and control module sends signal
NTP spraying system 100 is opened, a NTP control valve 114 is opened, active gasess are sprayed into from 201 front end of a DPF, to the
One DPF 201 is regenerated；Control module 400 monitors 201 front and back end pressure differential deltap P of a DPF1Less than regeneration target differential pressure
ΔP0When, that is, think that regeneration is completed；Control module sends the first NTP control valve 114 of signal-off, opens first exhaust control valve
203, close NTP spraying system 100；
When control module 400 monitors 202 front and back end pressure differential deltap P of the 2nd DPF2More than pressure reduction upper limit threshold Δ PcAnd first
DPF201 front and back end pressure differential deltap P1Less than pressure reduction upper limit threshold Δ Pc, that is, think that the 2nd DPF 202 needs to be regenerated；If now
First exhaust control valve 203 is closed, then open first exhaust control valve 203, judge again；If now first exhaust
Control valve 203 is in opening, then close second exhaust control valve 204, carry out on-line regeneration, and control module sends signal and opens
NTP spraying system 100 is opened, the 2nd NTP control valve 115 is opened, active gasess are sprayed into from 202 front end of the 2nd DPF, to second
DPF 202 is regenerated；Control module 400 monitors 202 front and back end pressure differential deltap P of the 2nd DPF2Less than regeneration target differential pressure Δ P0
When, that is, think that regeneration is completed；Control module sends the 2nd NTP control valve 115 of signal-off, opens second exhaust control valve 204,
Close NTP spraying system 100；
When control module 400 monitors that a DPF 201 and 202 front and back end pressure reduction of the 2nd DPF are all higher than pressure reduction upper limit threshold
Value Δ Pc, that is, think that both are required to be regenerated；Now for ensureing smooth gas discharge, control module 400 controls first row gas control
Valve processed 203 and second exhaust control valve 204 keep it turned on, waiting receive diesel engine stop signal, close first row gas control
Valve processed 203 and second exhaust control valve 204, carry out shutdown regeneration, and control module sends signal and opens NTP spraying system 100, beats
A NTP control valve 114, the 2nd NTP control valve 115 is opened, active gasess are sprayed into 201 front end of a DPF, the 2nd DPF respectively
202, a DPF 201, the 2nd DPF 202 are regenerated；When control module 400 monitors a DPF 201 side pressure in front and back
Difference Δ P1, 202 front and back end pressure differential deltap P of the 2nd DPF2Target differential pressure Δ P is respectively less than regenerated0When, that is, think that regeneration is completed；Control mould
Block sends the first NTP control valve 114 of signal-off, the 2nd NTP control valve 115, opens first exhaust control valve 203 and second row
Gas control valve 204, closes NTP spraying system 100.
When carrying out on-line regeneration and regeneration being shut down, that is, begin through dpf temperature Sensor monitoring and correspond at a temperature of DPF
Drop trend, to judge whether to reach regeneration opportunity；When control module 400 monitors T1And/or T2Less than the optimal regeneration temperature upper limit
Value TcWhen, regeneration is proceeded by, during regeneration, works as T1And/or T2Less than optimal regeneration temperature lower limit TfWhen, control
Module starts the first electric heating layer 301 and/or the second electric heating layer 302 heats a DPF 201 and/or the 2nd DPF 202, makes
First DPF 201 and/or 202 temperature of the 2nd DPF are maintained in optimal regeneration temperature range；First electrical heating after the completion of regeneration
Layer 301 and/or the second electric heating layer 302 stop heating.
In regeneration is shut down, first electric heating layer 301 and the second electric heating layer 302 provide electricity by Vehicular accumulator cell
Power.During on-line regeneration, first electric heating layer 301 and the second electric heating layer 302 are by the front end for being installed on double DPF system 200
Thermo-electric converting device 300 on gas exhaust piping provides electric power.
In regenerative process, it is 10L/min that control module adjusts air demand by mass flow controller 103；NTP sprays
110 voltage of system power supply is 17～20kV, and discharge frequency is 7～10kHz.
All dpf regeneration processes are all carried out after corresponding gas exhausting valve is closed, it is to avoid extraction flow is excessive and shadow
Ring the reaction effect of the internal carbon distribution of NTP and DPF；All dpf regeneration processes are all carried out in optimal regeneration temperature range, pole
The earth improves the utilization rate of NTP；Therefore, the present invention improves revival using online with regeneration strategy that is combining offline
Rate has simultaneously been effectively saved the energy.
The embodiment be the present invention preferred embodiment, but the present invention is not limited to above-mentioned embodiment, not
In the case of the flesh and blood of the present invention, any conspicuously improved, replacement that those skilled in the art can make
Or modification belongs to protection scope of the present invention.
Claims (10)
1. a kind of dpf regeneration system, it is characterised in that including NTP spraying system (100), double DPF system (200) and control mould
Block (400)；Described NTP spraying system (100) include NTP generator (101), supply blower fan (102), mass flow controller
(103), oscillograph (109), power supply (110), injection line (113), nozzle；Supply blower fan (102) is by being equipped with quality
The pipeline of flow controller (103) is connected with the inlet end (104) of NTP generator (101), the going out of NTP generator (101)
Gas end (105) is connected with nozzle by injection line (113), and injection line (113) back segment is divided into two injection branch roads, institute
State and a NTP control valve (114) and the 2nd NTP control valve (115) on two injection branch roads, is separately installed with, be provided with first
Injection branch road end connection first jet (116) of NTP control valve (114), is provided with the injection of the 2nd NTP control valve (115)
Road end connection second nozzle (117)；
Described pair of DPF system (200) includes a DPF (201) and the 2nd DPF (202), a DPF (201) and second
DPF (202) is connected in parallel by exhaust branch, is provided with first row gas control on the front end exhaust branch of a DPF (201)
Valve (203) processed, are provided with the first differential pressure pickup (401) on the exhaust branch of a DPF (201)；2nd DPF
(202) exhaust branch is provided with second exhaust control valve (204), and the upstream and downstream of the 2nd DPF (202) is respectively mounted
There is the second differential pressure pickup (402).
First jet (116) and second nozzle (117) in NTP spraying system (100) is respectively arranged in a DPF
(201) and the 2nd DPF (202) porch, a NTP control valve (114), the 2nd NTP control valve (115), first row
Gas control valve (203), second exhaust control valve (204), the first differential pressure pickup (401), the second differential pressure pickup (402) all with
Control module (400) connects；
Prestore in control module (400) DPF pressure reduction upper limit threshold Δ Pc, the mark target differential pressure Δ P that completes of dpf regeneration0,
And pressure differential deltap P at the first DPF (201) two ends of Real-time Collection1And/or the 2nd DPF (202) two ends pressure differential deltap P2, according to prestored
DPF pressure reduction upper limit threshold Δ PcAnd pressure differential deltap P at DPF (201) two ends of real-time detection1And/or the 2nd DPF (202) two ends
Pressure differential deltap P2Judge whether to need to carry out dpf regeneration；And by controlling a NTP control valve (114), the 2nd NTP control valve
(115), first exhaust control valve (203), the opening and closing of second exhaust control valve (204) and the unlatching of NTP spraying system (100)
A DPF (201) and/or the 2nd DPF (202) being realized with closing carries out on-line regeneration or shuts down regenerating.
2. dpf regeneration system according to claim 1 a, it is characterised in that DPF (201), the 2nd DPF (202)
Downstream be also separately installed with the first temperature sensor (403), second temperature sensor (404), a DPF (201) and
First electric heating layer (301) and second electric heating layer (302) that with power supply are connected is wrapped on 2nd DPF (202) shell respectively,
First temperature sensor (403), second temperature sensor (404) are all connected with control module；
The optimum temperature range T of regeneration is prestored in the control modulef～Tc, always according to first in control module (400)
Temperature T of DPF (201)1, the 2nd DPF (202) temperature T2, when carrying out on-line regeneration or regeneration being shut down, control T1And/or T2
Optimum temperature range T in regenerationf～TcInterior.
3. dpf regeneration system according to claim 1, it is characterised in that also include thermo-electric converting device (300), described
Thermo-electric converting device (300) is installed on the front end gas exhaust piping of double DPF system (200), is the first electric heating layer (301) and the
Two electric heating layers (302) provide electric energy.
4. dpf regeneration system according to claim 1, it is characterised in that first jet (116) and second nozzle
(117) the front end face 100mm of installation site distance the first DPF (201) and the 2nd DPF (202) respectively.
5. dpf regeneration system according to claim 1, it is characterised in that NTP spraying system (100) adopt water-cooled
Cooling system, cooling water is entered NTP generator (101) inside and discharged through outlet (112) by water inlet (111)；The NTP
The voltage of the power supply (110) of spraying system (100) and frequency are all adjustable.
6. dpf regeneration system according to claim 1, it is characterised in that described NTP generator (101) be
Discharge-type, including electrode (108) in thin wire gauze external electrode (106), quartz ampoule (107) and stainless steel tube；The thin wire gauze
External electrode (106) is wrapped in quartz ampoule (107) outer wall, and in the stainless steel tube, electrode (108) is installed in quartz ampoule (107)
Portion, in the stainless steel tube, between electrode (108) and quartz ampoule (107), Formation cross-section is the discharging gap of annular, the thin ferrum
Silk screen external electrode (106) is region of discharge.
7. dpf regeneration system according to claim 1, it is characterised in that the first electric heating layer (301) and the second electricity
Zone of heating (302) provides electric power in diesel engine stop by Vehicular accumulator cell.
8. the dpf regeneration control method of the dpf regeneration system described in claim 1, it is characterised in that comprise the steps：
Step one：Rating test is carried out to double DPF system (200), determines diesel engine under different operating modes on corresponding DPF pressure reduction
Limit threshold value Δ Pc, identify the regeneration target differential pressure Δ P that dpf regeneration is completed0；By pressure reduction upper limit threshold Δ Pc, regeneration target differential pressure Δ
P0It is stored in control module (400)；
Step 2：Control module (400) is by the first differential pressure pickup (401) and the second differential pressure pickup (402) monitoring first
DPF (201) and the magnitude of pressure differential Δ P of the 2nd DPF (202) front and back end1With Δ P2, on the pressure reduction that prestores in control module (400)
Limit threshold value Δ PcIt is compared, to judge whether that needs are regenerated；
When control module (400) monitors DPF (201) front and back end pressure differential deltap P1More than pressure reduction upper limit threshold Δ Pc and second
DPF (202) front and back end pressure differential deltap P2Less than pressure reduction upper limit threshold Δ Pc, that is, think that a DPF (201) needs to be regenerated；If this
When second exhaust control valve (204) be closed, then open second exhaust control valve (204), judge again；If now
Two gas exhausting valves (204) are in opening, then close first exhaust control valve (203), carry out on-line regeneration, control module
Send signal and NTP spraying system (100) is opened, a NTP control valve (114) is opened, by active gasess from a DPF (201)
Front end sprays into, and a DPF (201) is regenerated；Control module (400) monitors DPF (201) front and back end pressure differential deltap P1
Less than regeneration target differential pressure Δ P0When, that is, think that regeneration is completed；Control module sends the first NTP control valve (114) of signal-off,
First exhaust control valve (203) is opened, closes NTP spraying system (100)；
When control module (400) monitors the 2nd DPF (202) front and back end pressure differential deltap P2More than pressure reduction upper limit threshold Δ PcAnd first
DPF (201) front and back end pressure differential deltap P1Less than pressure reduction upper limit threshold Δ Pc, that is, think that the 2nd DPF (202) needs to be regenerated；If this
When first exhaust control valve (203) be closed, then open first exhaust control valve (203), judge again；If now
One gas exhausting valve (203) is in opening, then close second exhaust control valve (204), carry out on-line regeneration, control module
Send signal and NTP spraying system (100) is opened, the 2nd NTP control valve (115) is opened, by active gasess from the 2nd DPF (202)
Front end sprays into, and the 2nd DPF (202) is regenerated；Control module (400) monitors the 2nd DPF (202) front and back end pressure differential deltap P2
Less than regeneration target differential pressure Δ P0When, that is, think that regeneration is completed；Control module sends the 2nd NTP control valve (115) of signal-off,
Second exhaust control valve (204) is opened, closes NTP spraying system (100)；
When control module (400) monitors that a DPF (201) and the 2nd DPF (202) front and back end pressure reduction are all higher than pressure reduction upper limit threshold
Value Δ Pc, that is, think that both are required to be regenerated；Now for ensureing smooth gas discharge, control module (400) controls first exhaust
Control valve (203) and second exhaust control valve (204) keep it turned on, waiting receive diesel engine stop signal, close first
Gas exhausting valve (203) and second exhaust control valve (204), carry out shutdown regeneration, and control module sends signal and opens NTP injection
System (100), opens a NTP control valve (114), the 2nd NTP control valve (115), and active gasess are sprayed into a DPF respectively
(201) front end, the 2nd DPF (202), regenerate to a DPF (201), the 2nd DPF (202)；When control module (400) is supervised
Measure DPF (201) front and back end pressure differential deltap P1, the 2nd DPF (202) front and back end pressure differential deltap P2Target differential pressure Δ is respectively less than regenerated
P0When, that is, think that regeneration is completed；Control module sends the first NTP control valve (114) of signal-off, the 2nd NTP control valve
(115) first exhaust control valve (203) and second exhaust control valve (204), is opened, closes NTP spraying system (100).
9. dpf regeneration control method according to claim 8, it is characterised in that also include in the step one by examination
The optimum temperature range for determining active gasess and the internal carbon distribution reaction of DPF is tested, obtains optimal regeneration temperature higher limit TcAnd it is optimal
Regeneration temperature lower limit Tf, and by optimal regeneration temperature higher limit TcAnd optimal regeneration temperature lower limit TfIt is stored in control module
(400) in；When carrying out on-line regeneration and regeneration being shut down, that is, begin through dpf temperature Sensor monitoring and correspond at a temperature of DPF
Drop trend, to judge whether to reach regeneration opportunity；When control module (400) monitors T1And/or T2Less than in optimal regeneration temperature
Limit value TcWhen, regeneration is proceeded by, during regeneration, works as T1And/or T2Less than optimal regeneration temperature lower limit TfWhen, control
Molding block starts the first electric heating layer (301) and/or the second electric heating layer (302) heats a DPF (201) and/or the 2nd DPF
(202) DPF (201) and/or the 2nd DPF (202) temperature, is made to be maintained in optimal regeneration temperature range；After the completion of regeneration
First electric heating layer (301) and/or the second electric heating layer (302) stop heating.
10. dpf regeneration control method according to claim 8, it is characterised in that control module is controlled by mass flow
It is 10L/min that device (103) adjusts air demand；NTP spraying system power supply (110) voltage be 17～20kV, discharge frequency be 7～
10kHz.
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| CN107035470A (en) * | 2017-05-17 | 2017-08-11 | 江苏大学 | The dpf regeneration system and control method in a kind of optimization flow field |
| CN107747505A (en) * | 2017-08-16 | 2018-03-02 | 江苏大学 | A kind of system and control method that DPF is alternately regenerated using engine exhaust |
| CN108049941A (en) * | 2018-01-08 | 2018-05-18 | 陈爱国 | A kind of diesel engine exhaust gas treatment device and method |
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| CN110030071A (en) * | 2019-04-12 | 2019-07-19 | 江苏大学 | A kind of dpf regeneration system and control method optimizing heat management |
| CN110848001A (en) * | 2019-10-15 | 2020-02-28 | 江苏大学 | System for cyclically regenerating DPF by using NTP and control method |
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| CN110905631B (en) * | 2019-12-04 | 2021-02-26 | 宁波楷世环保科技有限公司 | Low-energy-consumption diesel engine tail gas treatment system suitable for high exhaust flow |
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