CN206522172U - A kind of exhaust treatment system based on NTP technologies - Google Patents
A kind of exhaust treatment system based on NTP technologies Download PDFInfo
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- CN206522172U CN206522172U CN201621186861.4U CN201621186861U CN206522172U CN 206522172 U CN206522172 U CN 206522172U CN 201621186861 U CN201621186861 U CN 201621186861U CN 206522172 U CN206522172 U CN 206522172U
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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 utility model provides a kind of exhaust treatment system based on NTP technologies, including after-treatment device, the first NTP spraying systems, the 2nd NTP spraying systems, power supplier, NTP generators cooling system and control system.First NTP spraying systems use air as source of the gas and produce the carbon distribution deposited in active material, oxidation DPF, realize DPF regenerated offline.2nd NTP spraying systems utilize N2Active gases is produced as source of the gas, NO is reducedxThe NO adsorbed in absorberx, realize NOxThe desorption of absorber.The utility model utilizes DPF and NOxPM and NO in the tail gas of absorber purified treatment diesel engine, effectively reduction diesel engine vent gasx, and removed while both can be realized.Using two sets of NTP spraying systems, DPF regeneration, NO can be realized respectivelyxThe desorption of absorber, and then realize to DPF and NOxThe efficient circulation of absorber is utilized.NOxN is converted into after being handled through the system2, N2It is nontoxic, increasingly strict Abgasgesetz can be met.
Description
Technical field
The utility model is related to the post processing field of diesel engine, at a kind of tail gas based on NTP technologies
Reason system.
Background technology
Diesel engine its be widely used in the fields such as communications and transportation and farm machinery because of excellent dynamic property, economy.Bavin
Harmful components in oil machine exhaust mainly have carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), particulate matter
(Particulate matter, PM) and sulfide etc..Compared to gasoline engine, diesel engine uses the average air-fuel ratio of gaseous mixture
It is larger, therefore its CO and HC is discharged and is significantly lower than gasoline engine, but diesel engine NOxDischarge with PM is higher.Diesel oil is reduced at present
Machine NOxConventional exhaust aftertreatment technology can cause PM discharge increases, which increase diesel engine NOxThe control difficulty discharged with PM.
Therefore, seek while reducing NOxTurn into a major tasks in Exhaust Control for Diesel Engine technical research with the method that PM is discharged.
At present, diesel particulate trap (DPF) is one of reduction maximally effective technology of diesel PM emissions, arresting efficiency
Up to more than 90%.But with depositions of the PM in DPF, DPF can be blocked, and cause exhaust back pressure to raise, oil consumption increase is entered
And influence the normal operation of engine.
Zeolite is to NOxThere is good adsorption cleaning function.There is natural zeolite silicon-oxy tetrahedron and aluminum-oxygen tetrahedron to be formed
Skeleton structure, can spatially form abundant bug hole and duct, there is very strong adsorption capacity.Norton Co's zeolite
NO in molecular sieve processing nitric plant's tail gasx, content can be made to drop to 20ul/L by 2500ml/L.
Low temperature plasma (NTP) technology is by treatment effeciency is high, device is simple, energy consumption is low, particle-resistant interference performance is strong
The advantages of, there is obvious advantage in terms of the exhaust emissions of processing diesel engine, be the study hotspot in tail gas clean-up field in recent years.
A kind of vehicle-mounted water cooling formula NTP is described in patent CN105251323A and occurs system, the system is realized using NTP generators
DPF highly efficient regeneration, while during the active gases for producing NTP generators sprays into exhaust, realizing NOxOxidation.
But the problem of this method has certain：NOxMajor oxidation product be NO2, it is discharged into the NO of air2Acid rain, photochemistry can be caused dirty
Dye.If being exposed to NO for a long time2Among, the probability of respiratory tract infection will increase.When situation is serious, NO2Result even in lung
Permanent lesion.
Utility model content
To solve the above problems, the utility model provides a kind of exhaust treatment system based on NTP technologies, using DPF and
NOxPM and NO in absorber, reduction diesel engine vent gasxDischarge, and realize by NTP technologies DPF regeneration and NOxAbsorber
Desorption.
A kind of exhaust treatment system based on NTP technologies, it is characterised in that including after-treatment device, the first NTP injections system
System, the 2nd NTP spraying systems, power supplier, NTP generators cooling system and control system,
The after-treatment device includes the connected exhaust branch of main exhaust, main exhaust, is connected on main exhaust
DPF and NOxAbsorber, the DPF is installed on the NOxThe upstream of absorber；
The first NTP spraying systems include the first NTP generators, the first mass flow controller, supply blower fan, first
Injection line and first jet, the supply blower fan enter through first mass flow controller with the first NTP generators
Gas port is connected, and the first NTP generator exports are connected through first injection line with first jet, the first jet position
In DPF upstreams, active gases can be sprayed into the DPF；
The 2nd NTP spraying systems include the 2nd NTP generators, the second mass flow controller, air pump, N2Source of the gas,
Second injection line and second nozzle, the N2Source of the gas is connected with air pump, and the air pump is through the second mass flow controller and institute
State the 2nd NTP generators to be connected, the 2nd NTP generator exports are connected through the second injection line with second nozzle, described the
Two nozzles are located at NOxAbsorber upstream, can be to the NOxInjection active gases in absorber；
The power supplier includes vehicle power, inversion boosting device, the first relay and the second relay, the car
Load power supply is the first NTP generators by inversion boosting device, the 2nd NTP generators are powered, the first relay and the second relay
It is separately positioned on the first NTP generators, on the power supply circuit of the 2nd NTP generators；
The NTP generators cooling system includes water tank, the first water pump and the second water pump, and the water tank passes through first respectively
Water pump and the second water pump provide cooling water for the first NTP generators, the 2nd NTP generators；
The control system includes control module, is arranged on DPF and NOxThe first control on main exhaust between absorber
Valve processed, the second control valve being arranged on exhaust branch, the 3rd control valve being arranged in the first injection line, setting
The 4th control valve in the second injection line, it is arranged on the differential pressure pickup at DPF two ends, is arranged on NOxAbsorber downstream
NOxSensor and O2Sensor, first control valve, the second control valve, the 3rd control valve, the 4th control valve,
Differential pressure pickup, NOxSensor and O2Sensor is connected with control module；
The NOxSensor and the O2Sensor is used to monitor the NOxNO in absorber backend gasxAnd O2Contain
Amount；
The differential pressure pickup is used for the pressure difference for monitoring the DPF two ends；
The control module is according to differential pressure pickup, NOxSensor and O2The data of sensor detection and control strategy control
First control valve, the second control valve, the 3rd control valve, the 4th control valve, the first relay and the second relay
Open and close, and supply the work of blower fan, air pump, the first water pump and the second water pump.
Preferably, the first jet is threadingly attached in first injection line, apart from the DPF upstreams
At 100mm；The second nozzle is threadingly attached in second injection line, apart from the NOxAbsorber upstream
At 100mm.
Preferably, the NOxAbsorber is by substrate, porous plate and NOxAdsorbent is constituted；The NOxAdsorbent in absorber
For zeolite, two blocks of stainless steel porous plates are mounted in substrate two ends, the NOxAdsorbent addition is on the substrate in absorber.
Preferably, the first NTP generators and the 2nd NTP generators are dielectric barrier discharge type, using stainless steel
Pipe is as low-field electrode, and quartz glass tube is as block media, and thin wire gauze is as high-field electrode, and the stainless steel tube is located at stone
In English glass tube and coaxial with quartz glass tube, the thin wire gauze is wrapped on the quartz glass tube.
Preferably, the DPF is made up of honeycomb ceramic filter material, and hole density is 100cpsi, a diameter of 144mm, female
Line length 152mm.
Preferably, exhaust branch is located at the DPF and NOxBetween absorber.
The control method of the described exhaust treatment system based on NTP technologies, comprises the following steps：
Step one：Rating test is carried out to diesel exhaust systems, the higher limit of DPF two ends pressure difference under different operating modes is determined
ΔPmWith regeneration desired value Δ PnAnd NO in air exitxThe higher limit C of contentm, and by pressure difference higher limit Δ Pm, regeneration target
It is worth Δ PnAnd NOxThe higher limit C of contentmIt is stored in control module；
Step 2：When engine is run, DPF two ends pressure differential deltap P are monitored by differential pressure pickup, to judge whether it needs
Regenerated；Pass through NOxSensor monitoring main exhaust exit NOxContent CNOx, to judge NOxWhether absorber needs solution
Inhale；
Step 3：When control module monitoring detects DPF two ends pressure differential deltap P more than higher limit Δ PmOr NO in air exitx
Content CNOxMore than NOxThe higher limit C of contentm, engine stopping signal is detected, letter is shut down when control module detects engine
Number, control module closes the first control valve, opens the second control valve；
Step 4：When control module detects DPF two ends pressure differential deltap P more than higher limit Δ Pm, and NO in air exitx's
Content CNOxLess than higher limit CmWhen, control module open the 3rd control valve, and transmit a signal to vehicle power, supply blower fan,
First mass flow controller, the first relay and the first water pump, open the first NTP spraying systems；First NTP spraying systems are produced
Raw active material is sprayed through the first injection line by first jet, the particulate matter deposited in oxidation DPF, then by exhaust branch
Discharge, realizes DPF regeneration；It is less than or equal to regeneration desired value Δ P when detecting DPF two ends pressure differential deltap PnWhen, close the first NTP
Spraying system, closes the second control valve, the 3rd control valve, opens the first control valve；
When control module detects NO in air exitxContent be more than higher limit, and DPF two ends pressure differential deltap P be less than it is upper
Limit Δ Pm, control module opens the 4th control valve, and transmits a signal to vehicle power, air pump, the control of the second mass flow
Device, the second relay and the second water pump, open the 2nd NTP spraying systems；The active material that 2nd NTP spraying systems are produced is through the
Two injection lines spray into NO by second nozzlexIn absorber, gone out by main exhaust, realize NOxThe desorption of absorber；Work as O2Sensing
Device detects NOxO in absorber backend gas2When content is 0, show NOxWithout NO in absorberxCan with N radical reactions,
NOxAbsorber has completed desorption, and control module closes the 2nd NTP spraying systems, closes the second control valve, the 4th control valve
Door, opens the first control valve；
When control module detects DPF two ends pressure differential deltap P more than higher limit Δ Pm, and NO in air exitxContent be more than
Higher limit CmWhen, control module opens the 3rd control valve, the 4th control valve, and transmits a signal to vehicle power, supply wind
Machine, the first mass flow controller, the first relay and the first water pump, air pump, the second mass flow controller, the second relay
With the second water pump, the first NTP spraying systems, the 2nd NTP spraying systems are opened；DPF regeneration, NOxThe desorption of absorber, when
DPF two ends pressure differential deltap P is less than or equal to regeneration desired value Δ PnWhen, the first NTP spraying systems are closed, work as NOxAbsorber backend gas
Middle O2When content is 0, the 2nd NTP spraying systems are closed, until being less than or equal to regeneration desired value Δ P to DPF two ends pressure differential deltap Pn、
NOxO in absorber backend gas2When content is 0, the first NTP spraying systems and the 2nd NTP spraying systems are all turned off, and control mould
Block closes the second control valve, the 3rd control valve and the 4th control valve, opens the first control valve.
First mass flow controller and the second mass flow controller control gas source and flow amount to be 5L/min.
The utility model utilizes DPF and NOxAbsorber realizes the purified treatment of diesel engine Tail Gas, can effectively reduce bavin
PM and NO in oil machine tail gasxDischarge.After a shutdown, DPF is regenerated using non-thermal plasma trap (NTP), while right
NOxAbsorber is desorbed, and then is realized to DPF and NOxThe efficient circulation of absorber is utilized.NOxTurned after being handled through the system
Turn to N2, compared to patent CN105251323A by NOxIt is oxidized to NO2, N2It is nontoxic, it can more meet increasingly strict discharge
Regulation.
Brief description of the drawings
Fig. 1 is for realizing the exhaust treatment system schematic diagram of the present utility model based on NTP technologies.
Fig. 2 is the structural representation of the NTP generators of designed, designed.
Fig. 3 is the schematic diagram of control module control method.
Description of reference numerals：
101：Main exhaust；102：Exhaust branch；103：DPF；104：NOxAbsorber；1041：Porous plate；1042：NOxInhale
Attached dose；1043：Substrate；201：First NTP generators；202：First mass flow controller；203：Supply blower fan；204：First
Injection line；205：First jet；301：2nd NTP generators；302：Second mass flow controller；303：Air pump；304：
N2Source of the gas；305：Second injection line；306：Second nozzle；401：Vehicle power；402：Inversion boosting device；403：First relay
Device；404：Second relay；501：Water tank；502：First water pump；503：Second water pump；601：Control module：602：First control
Valve processed；603：Second control valve；604：3rd control valve；605：4th control valve；606：Differential pressure pickup；607：
NOxSensor；608：O2Sensor；700：Diesel engine；801：Cooling water inlet；802：Coolant outlet；803：Stainless steel tube；
804：Quartz glass tube；805：Thin wire gauze；806：NTP generator inlets；807：NTP generator exports；
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment is further described to the utility model, but of the present utility model protect
Shield scope is not limited to this.
Fig. 1 illustrates the exhaust treatment system described in the utility model based on NTP technologies, and the system includes post processing and filled
Put, the first NTP spraying systems, the 2nd NTP spraying systems, power supplier, NTP generators cooling system and control system.
The after-treatment device includes main exhaust 101, DPF 103, NOxAbsorber 104 and exhaust branch 102.The first NTP sprays
Penetrating system includes the first NTP generators 201, the first mass flow controller 202, supply blower fan 203, the first injection line 204
With first jet 205.The 2nd NTP spraying systems include the 2nd NTP generators 301, the second mass flow controller 302,
Air pump 303, N2Source of the gas 304, the second injection line 305 and second nozzle 306.The power supplier includes vehicle power
401st, inversion boosting device 402, the first relay 403 and the second relay 404.The NTP generators cooling system includes water tank
501st, the first water pump 502 and the second water pump 503.The control system includes control module 601, the first control valve 602, second
Control valve 603, the 3rd control valve 604, the 4th control valve 605, differential pressure pickup 606, NOx sensor 607 and O2Pass
Sensor 608.
The supply blower fan 203 is through first mass flow controller 202 and the air inlet of the first NTP generators 201
Mouth is connected, and the supply blower fan 203 receives the backward first NTP generators 201 of the signal of control module 601 and provides gas
Source.The N2Source of the gas 304 is connected with the air pump 303, and the air pump 303 is through the second mass flow controller 302 and described the
Two NTP generators 301 are connected.The first NTP generators 201 are exported through first injection line 204, are sprayed by described first
Mouth 205 sprays active gases to the DPF 103.The 2nd NTP generators 301 are exported through the second injection line 305, by
Two nozzles 306 are to the NOxAbsorber 104 sprays active gases.The first jet 205 is threadingly attached to described first
On the tube wall of injection line 204, at the upstream 100mm of DPF 103.The second nozzle 306 is threadingly attached to institute
State on the tube wall of the second injection line 305, apart from the NOxAt the upstream 100mm of absorber 104.
The DPF 103 and NOxAbsorber 104 is arranged on the main exhaust 101 by the way of series connection, institute
State DPF 103 and be installed on the NOxBefore absorber 104.The NOxAbsorber 104 is by substrate 1043, porous plate 1041 and NOx
Adsorbent 1042 is constituted.The NOxThe material of adsorbent 1042 is mainly zeolite, zeolite adsorption NO in absorber 104xProcess
For physical process, no chemical reaction occurs.The NOxThe two ends of absorber 104 are equipped with two blocks of stainless steel porous plates 1041.The NOx
Adsorbent 1042 is added on the substrate 1043 in absorber.In the DPF 103 and the NOxRow between absorber 104
An exhaust branch 102, bypassed exhaust gas when being closed for the first control valve 602 are drawn in air pipe.Diesel engine normal work
When, the first control valve 602 is opened, and the second control valve 603 is closed, and tail gas is through the DPF 103 and NOxAbsorber
104 discharge from main exhaust 101.NTP reduces NOxEffect is preferable in the case of oxygen deprivation or anaerobic, NOxAbsorber 104 needs
During desorption, the first control valve 602 is closed.During dpf regeneration, active gases occurs with the carbon distribution in the DPF 103
Chemical reaction, reaction product is discharged from the exhaust branch 102.
First control valve 602 is installed, positioned at the NO in the main exhaust 101xThe front end of absorber 104；
Second control valve 603 is installed in the entrance of exhaust branch 102；The 3rd is provided with first injection line 204
Control valve 604；The 4th control valve 605 is installed in second injection line 305.First control valve 602,
Second control valve 603, the 3rd control valve 604 and the 4th control valve 605 all with the control module
601 are connected, and are turned on and off according to the signal of control module 601.When engine is run, first control valve 602 is opened,
Second control valve 603, the 3rd control valve 604 and the 4th control valve 605 are closed.The two ends of DPF 103 are equipped with
The differential pressure pickup 606, is connected with the control module 601.The NOx sensor 607 and the O2Sensor 608 and institute
State control module 601 to be connected, be mainly used in monitoring and flow through the DPF 103 and the NOxNO in tail gas after absorber 104xAnd O2
Content.Control module 601 receives the pressure differential deltap P and NO transmitted from differential pressure pickup 606xThe gas that sensor 607 is transmitted is dense
Spend CNOx, Δ P is more than or equal to Δ PmOr CNOxMore than or equal to CmWhen, control module 601 controls the opening and closing of four control valves, and passes
The number of delivering letters gives vehicle power 401, the first relay 403, the second relay 404, the first water pump 502, the second water pump 503, first
Mass flow controller 202, the second mass flow controller 302, supply blower fan 203 and air pump 303, open NTP spraying systems,
DPF is regenerated, to NOxAbsorber is desorbed.
Fig. 2 is the structural representation of NTP generators.The first NTP generators 201 and the 2nd NTP generators 301 are same
One type generator.The NTP generators are dielectric barrier discharge type, using stainless steel tube 803 as low-field electrode, quartzy glass
Glass pipe 804 is used as high-field electrode as block media, thin wire gauze 805.The stainless steel tube 803 is located at quartz glass tube 804
In, and it is coaxial with quartz glass tube 804, the thin wire gauze 805 is wrapped on the quartz glass tube 804.NTP spraying systems
After unlatching, vehicle power 401 provides electric energy, the first relay 403 and the second relay through inversion boosting device 402 to NTP generators
Device 404 receives to control the opening and closing of circuit after the signal of control module 601.First mass flow controller 202 and the second quality stream
Amount controller 302 controls the gas source and flow amount into NTP generators to be 5L/min.The first NTP generators 201 and described second
NTP generators 301 are water-cooled NTP generators.Cooling device includes water tank 501, the first water pump 502 and the second water pump 503.
After the signal of the water pump receive and control module 601, recirculated cooling water is extracted from the water tank 501, NTP generators are flowed through
Stainless steel tube 803, realizes the cooling to NTP generators.
Fig. 3 is to describe the flow chart that control module 601 performs illustrative steps.First, diesel exhaust systems are carried out
Rating test, the higher limit and NO of diesel engine DPF pressure differences under different operating modesxThe higher limit of content is different, beforehand through demarcation
Experiment determines pressure difference higher limit Δ P of the diesel engine under different operating modesmWith lower limit Δ PnAnd NOxThe higher limit C of contentm, and
By pressure difference higher limit Δ Pm, regeneration desired value Δ PnAnd NOxThe higher limit C of contentmIt is stored in control module 601.
The diesel engine 700 is once start, then control process starts, and control module 601 is first according to differential pressure pickup 606
The pressure differential deltap P of the front and back ends of DPF 103 is obtained, according to NOxSensor 607 obtains NOxNO in the rear end tail gas of absorber 104xContent
CNOx。
Rate-determining steps enter 902, and control module 601 calls corresponding Δ P according to the operating condition of diesel engine 700mAnd Cm,
And by the Δ P and C of acquisitionNOxWith Δ PmAnd CmIt is compared, if Δ P is more than or equal to Δ PmOr CNOxMore than or equal to Cm, then control
Step processed enters 903, otherwise return to step 901.In step 903, the detection of control module 601 stop sign.The utility model
It is the regeneration and NO that DPF 103 is carried out to it in diesel engine stopxThe desorption of absorber 104, offline active material utilization
It is higher, make exhaust treatment system more economical, efficient.In step 904, the detection of control module 601 stopping signal, if so,
Into rate-determining steps 905, otherwise return to step 903.In rate-determining steps 905, control module 601 closes the first control valve
602 and open the second control valve 603.NOxThe desorption of absorber 104 is better under conditions of oxygen deprivation or anaerobic, otherwise
NOxEasily it is oxidized to NO2, so closing the first control valve 602.During dpf regeneration, product is discharged from exhaust branch 102.
Exhaust treatment system of the present utility model, using two sets of NTP spraying systems, DPF regeneration and NOxThe solution of absorber
Separately processing is inhaled, this system economy is higher.In processing procedure, it may appear that three kinds of actual conditions, situation one：Only DPF is needed
Regenerate, NOxAbsorber is also in normal work.Situation two：Only NOxAbsorber needs desorption, and DPF is still in normal work.Situation
Three：DPF needs to regenerate NO simultaneouslyxAbsorber is also required to desorption.In rate-determining steps 906, control module 601 judges pressure differential deltap P
And NOxContent CNOxWhether higher limit is simultaneously greater than.If it is, showing DPF and NOxAbsorber needs to carry out NTP processing simultaneously,
I.e. situation three, into rate-determining steps 918, opens the 3rd control valve 604 and the second injection line in the first injection line 204
The 4th control valve 605 in 305.Conversely, show that only one of which needs NTP processing, into rate-determining steps 907, further
Judge that DPF needs to regenerate or NOxAbsorber needs desorption.In step 907, if pressure differential deltap P is more than higher limit Pm, show
DPF needs regeneration, NOxAbsorber is in normal work, i.e. situation one, then into step 908, opens in the first injection line 204
The 3rd control valve 604.Conversely, showing NOxAbsorber needs desorption, and DPF still in normal work, i.e. situation two, then enters
Step 913, the 4th control valve 605 in the second injection line 305 is opened.
Appearance situation for the moment, into after rate-determining steps 908, opens the 3rd control valve, after being finished, into control step
Rapid 909, open the first NTP spraying systems.Control module transmits a signal to vehicle power 401, inversion boosting device 402, the first water
Pump 502, the first relay 403, the first mass flow controller 202 and supply blower fan 203, open the first NTP spraying systems, right
DPF is regenerated.In rate-determining steps 910, control module 601 is real-time monitored to the pressure differential deltap P and pressure difference at the two ends of DPF 103
Lower limit Δ PnIt is compared.If Δ P is less than or equal to Δ Pn, show that dpf regeneration has been completed, into rate-determining steps 911, instead
It, return to step 909.After step 911 closes the first spraying system, into step 912, second, third control valve is closed,
Start the first control valve.DPF 103 regenerates finished
During appearance situation two, into after rate-determining steps 913, the 4th control valve is opened, after being finished, into control step
Rapid 914, open the 2nd NTP spraying systems.Control module transmits a signal to vehicle power 401, inversion boosting device 402, the second water
Pump 503, the second relay 404, the second mass flow controller 302 and air pump 303, open the 2nd NTP spraying systems, to NOx
Absorber is desorbed.In rate-determining steps 915, control module 601 monitors NO in real timexO in absorber backend gas2Content,
When content is 0, show NOxAbsorber has completed desorption, into rate-determining steps 916, conversely, return to step 914.In step
916 close after the second spraying system, into step 917, close the second, the 4th control valve, start the first control valve.NOx
The desorption of absorber 104 is finished.
During appearance situation three, into after rate-determining steps 918, the three, the 4th control valves are opened, after being finished, are entered
Rate-determining steps 919, open first, second NTP spraying systems.Control module transmits a signal to vehicle power 401, inversion boosting device
402nd, the first water pump 502, the first mass flow controller 202, supply blower fan 203, the second water pump 503, the second mass flow control
Device 302 processed, air pump 303, the first relay 403 and the second relay 404, open first, second NTP spraying systems.In control
In step 910, control module 601 monitors the pressure differential deltap P and NO at the two ends of DPF 103 in real timexO in absorber backend gas2Contain
Amount, if Δ P is less than lower limit Δ PnAnd oxygen content CO2For 0, then show that DPF has completed regeneration and NOxAbsorber has completed solution
Inhale, into rate-determining steps 529, close the first NTP spraying systems and the 2nd NTP spraying systems, DPF regeneration and NOxAbsorber
Desorption be fully completed.Conversely, into rate-determining steps 921, if Δ P is less than lower limit Δ Pn, show that DPF has completed regeneration,
NOxAbsorber also not desorption completely, into rate-determining steps 922.Conversely, into rate-determining steps 926.If DPF first completes regeneration,
In step 922, the first NTP spraying systems are closed, the 2nd NTP spraying systems are continued on.Into step 923, if control module
Monitor NOxThe O of absorber rear end2Content is zero, shows NOxThe desorption of absorber has also been completed, into step 924, closes the
Two NTP spraying systems, conversely, return to step 922.If NOxAbsorber first completes regeneration, into step 926, closes the 2nd NTP
Spraying system, opens the first NTP spraying systems.Into step 927, if the pressure difference at DPF two ends is less than lower limit Δ Pn, show
DPF has completed regeneration, into rate-determining steps 928, closes the first NTP spraying systems.Conversely, return to step 926.When DPF is complete
Into regeneration and NOxAbsorber has completed desorption, into rate-determining steps 925, close second, third, the 4th control valve, open the
One control valve.So far, a whole set of NTP regeneration and NOxThe desorption of absorber has been carried out finishing.
The embodiment for it is of the present utility model preferred embodiment, but the utility model is not limited to above-mentioned embodiment party
Formula, in the case of without departing substantially from substantive content of the present utility model, it is any apparent that those skilled in the art can make
Improvement, replacement or modification belong to protection domain of the present utility model.
Claims (6)
1. a kind of exhaust treatment system based on NTP technologies, it is characterised in that including after-treatment device, the first NTP injections system
System, the 2nd NTP spraying systems, power supplier, NTP generators cooling system and control system,
The after-treatment device includes the connected exhaust branch (102) of main exhaust (101), main exhaust (101), is connected on master
DPF (103) and NO on blast pipe (101)xAbsorber (104), the DPF (103) is installed on the NOxAbsorber (104)
Upstream；
The first NTP spraying systems include the first NTP generators (201), the first mass flow controller (202), supply wind
Machine (203), the first injection line (204) and first jet (205), the supply blower fan (203) is through first mass flow
Controller (202) is connected with the first NTP generators (201) air inlet, and the first NTP generators (201) outlet is through institute
State the first injection line (204) with first jet (205) to be connected, the first jet (205) is located at DPF (103) upstream, can
Injection active gases in the DPF (103)；
The 2nd NTP spraying systems include the 2nd NTP generators (301), the second mass flow controller (302), air pump
(303)、N2Source of the gas (304), the second injection line (305) and second nozzle (306), the N2Source of the gas (304) and air pump (303)
It is connected, the air pump (303) is connected through the second mass flow controller (302) with the 2nd NTP generators (301), described
The outlet of 2nd NTP generators (301) is connected through the second injection line (305) with second nozzle (306), the second nozzle
(306) it is located at NOxAbsorber (104) upstream, can be to the NOxInjection active gases in absorber (104)；
The power supplier include vehicle power (401), inversion boosting device (402), the first relay (403) and second after
Electrical equipment (404), the vehicle power (401) is the first NTP generators (201), the 2nd NTP hairs by inversion boosting device (402)
Raw device (301) power supply, the first relay (403) and the second relay (404) are separately positioned on the first NTP generators (201), the
On the power supply circuit of two NTP generators (301)；
The NTP generators cooling system includes water tank (501), the first water pump (502) and the second water pump (503), the water tank
(501) by the first water pump (502) and the second water pump (503) it is respectively the first NTP generators (201), the 2nd NTP generators
(301) cooling water is provided；
The control system includes control module (601), is arranged on DPF (103) and NOxMain exhaust between absorber (104)
(101) the first control valve (602) on, the second control valve (603) being arranged on exhaust branch (102), it is arranged on
The 3rd control valve (604) in one injection line (204), the 4th control valve being arranged in the second injection line (305)
(605), it is arranged on the differential pressure pickup (606) at DPF (103) two ends, is arranged on NOxThe NO in absorber (104) downstreamxSensor
And O (607)2Sensor (608), first control valve (602), the second control valve (603), the 3rd control valve
(604), the 4th control valve (605), differential pressure pickup (606), NOxSensor (607) and O2Sensor (608) with control
Module (601) is connected；
The NOxSensor (607) and the O2Sensor (608) is used to monitor the NOxIn absorber (104) backend gas
NOxAnd O2Content；
The differential pressure pickup (606) is used for the pressure difference for monitoring the DPF (103) two ends；
The control module (601) is according to differential pressure pickup (606), NOxSensor (607) and O2The number of sensor (608) detection
According to and control strategy control the first control valve (602), the second control valve (603), the 3rd control valve (604), the 4th control
The open and close of valve (605) processed, the first relay (403) and the second relay (404), and supply blower fan (203), gas
The work of pump (303), the first water pump (502) and the second water pump (503).
2. a kind of exhaust treatment system based on NTP technologies according to claim 1, it is characterised in that first spray
Mouth (205) is threadingly attached on first injection line (204), at the DPF (103) upstream 100mm；It is described
Second nozzle (306) is threadingly attached on second injection line (305), apart from the NOxAbsorber (104) upstream
At 100mm.
3. the exhaust treatment system according to claim 1 based on NTP technologies, it is characterised in that the NOxAbsorber
(104) by substrate (1043), porous plate (1041) and NOxAdsorbent (1042) is constituted；The NOxAdsorbent in absorber (104)
(1042) it is zeolite, two pieces of stainless steel porous plates (1041) are mounted in substrate (1043) two ends, the NOxAdsorbent (1042) is added
On substrate (1043) in absorber.
4. the exhaust treatment system according to claim 1 based on NTP technologies, it is characterised in that the first NTP occurs
Device (201) and the 2nd NTP generators (301) are dielectric barrier discharge type, using stainless steel tube (803) as low-field electrode,
Quartz glass tube (804) is as block media, and thin wire gauze (805) is as high-field electrode, and the stainless steel tube (803) is located at stone
In English glass tube (804) and with quartz glass tube (804) coaxially, the thin wire gauze (805) is wrapped in the quartz glass tube
(804) on.
5. the exhaust treatment system according to claim 1 based on NTP technologies, it is characterised in that the DPF (103) is
Honeycomb ceramic filter material is made, and hole density is 100cpsi, a diameter of 144mm, the long 152mm of bus.
6. the exhaust treatment system according to claim 1 based on NTP technologies, it is characterised in that exhaust branch (102) position
In the DPF (103) and the NOxBetween absorber (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621186861.4U CN206522172U (en) | 2016-11-04 | 2016-11-04 | A kind of exhaust treatment system based on NTP technologies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621186861.4U CN206522172U (en) | 2016-11-04 | 2016-11-04 | A kind of exhaust treatment system based on NTP technologies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206522172U true CN206522172U (en) | 2017-09-26 |
Family
ID=59887675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621186861.4U Withdrawn - After Issue CN206522172U (en) | 2016-11-04 | 2016-11-04 | A kind of exhaust treatment system based on NTP technologies |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206522172U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382145A (en) * | 2016-11-04 | 2017-02-08 | 江苏大学 | Off-gas treatment system based on NTP technology and control method |
| CN110030071A (en) * | 2019-04-12 | 2019-07-19 | 江苏大学 | A kind of dpf regeneration system and control method optimizing heat management |
| CN112282909A (en) * | 2020-10-30 | 2021-01-29 | 潍柴动力股份有限公司 | Engine exhaust system, control method thereof and engine |
-
2016
- 2016-11-04 CN CN201621186861.4U patent/CN206522172U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382145A (en) * | 2016-11-04 | 2017-02-08 | 江苏大学 | Off-gas treatment system based on NTP technology and control method |
| CN106382145B (en) * | 2016-11-04 | 2019-04-02 | 江苏大学 | A kind of exhaust treatment system and control method based on NTP technology |
| CN110030071A (en) * | 2019-04-12 | 2019-07-19 | 江苏大学 | A kind of dpf regeneration system and control method optimizing heat management |
| CN110030071B (en) * | 2019-04-12 | 2021-05-25 | 江苏大学 | DPF regeneration system for optimizing thermal management and control method |
| CN112282909A (en) * | 2020-10-30 | 2021-01-29 | 潍柴动力股份有限公司 | Engine exhaust system, control method thereof and engine |
| CN112282909B (en) * | 2020-10-30 | 2022-04-05 | 潍柴动力股份有限公司 | Engine exhaust system, control method thereof and engine |
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