CN105880211A - Cleaning device for carrier in engine exhaust gas after-treatment system and control method of cleaning device - Google Patents
Cleaning device for carrier in engine exhaust gas after-treatment system and control method of cleaning device Download PDFInfo
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- CN105880211A CN105880211A CN201610194671.5A CN201610194671A CN105880211A CN 105880211 A CN105880211 A CN 105880211A CN 201610194671 A CN201610194671 A CN 201610194671A CN 105880211 A CN105880211 A CN 105880211A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/14—Removing waste, e.g. labels, from cleaning liquid; Regenerating cleaning liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to a cleaning device for a carrier in an engine exhaust gas after-treatment system. The cleaning device comprises a cleaning medium (1), a pressurization pump (2), a heater (3), a temperature sensor (4), a sound wave emitter (5), an after-treatment fixing device (6), a sealing gasket (7), a filter device (10), a reactor (11) and a storage tank (12). The cleaning device is characterized in that the pressurization pump (2), the heater (3), the sound wave emitter (5), the after-treatment device (8), the filter device (10), the cleaning medium (11) and the storage tank (12) are connected through pipelines to form a closed circulating cleaning system; and the device can complete cleaning in two steps, ash removal is conducted firstly, the cleaning medium is then replaced, device parameters are adjusted, the catalyst activity reduction is conducted, and therefore the cleaning device for the engine exhaust gas after-treatment system has the beneficial effect of being wide in application range.
Description
Technical field
The invention belongs to engine exhaust emission and control technical field, be specifically related to cleaning device and the control method thereof of carrier in engine exhaust aftertreatment system.
Background technology
Progress and public's raising to environmental protection requirement along with engine technology; the engine emission regulation of China is more and more stricter; the strictest along with engine emission requirements; purification techniques in cylinder is used to improve the difficulty of engine working process increasing; the electromotor of dynamic property, economy and the discharge performance of making overall plans will become increasingly complex, and its cost also steeply rises.Therefore, the research of engine emission post-processing technology has all successively been carried out in countries in the world, on the basis of not affecting engine performance, gas extraction system is installed various post processing purifier, use physics and chemical method to reduce pollutant in aerofluxus and arrange to atmospheric environment.
At present, conventional exhaust post-treatment apparatus of engine mainly includes triple effect catalytic converter (Three-Way Catalytic, TWC), diesel oxidation converter (Diesel Oxidation Catalytic, DOC), diesel engine particle catcher (Diesel Particulate Filter, DPF), selective catalytic reduction device (Selective Catalytic Reduction, SCR) etc., above-mentioned exhaust post-treatment apparatus of engine all uses cellular porous media as carrier, the pollutant in aerofluxus are purified by the way of physical filtering or chemical catalysis.Electromotor actually used during, due to the inoxidable granule containing trace in aerofluxus and the composition causing noble metal catalyst to lose efficacy, engine post-treatment apparatus is during long-term use, there will be honeycomb support blocking and the situation of noble metal catalyst inefficacy, thus cause after-treatment device service behaviour to deteriorate, and affect the overall performance of electromotor.
In order to ensure that after-treatment device normally works in service life of aeroengine, prevent the harm atmospheric environment that discharges pollutants, blocking material in after-treatment device carrier regularly must be cleared up, the noble metal catalyst of inactivation in carrier is carried out regularly active reduction, so that it is guaranteed that after-treatment device is to the high efficiency filter of Engine Emissions thing and catalysis.
Existing engine exhaust aftertreatment system cleaning technique mainly includes pressure-air blowback, hanging bottle type cleaning, special agent cleaning, high-temperature steam reduction etc..Pressure-air back-flushing technique is the carrier of the pressure-air blowback after-treatment system utilizing high-pressure pump to provide, thus the purpose of ash in reaching removing carrier, owing to it is simple being removed by physical means by the ash in carrier, the noble metal catalyst of the inactivation on carrier can not be reduced, therefore it mainly applies to the cleaning to after-treatment system blocking carrier, such as the removing of DPF blocking ash, function singleness.Hanging bottle type cleans after referring to be added by special agent by air inlet vacuum tube addition electromotor in-cylinder combustion, high-temperature oxidation environment is formed around post processing catalyst converter, S, P chemical complex reaction that be will be attached to catalyst converter surface by redox reaction is clear, although the method need not dismantle after-treatment device, but clean costly, operation complexity, scavenging period is long, thereby increases and it is possible to cause electromotor operation irregularity.It is to utilize Special cleaning solvent soak carrier or spray that special agent cleans, thus reach to remove accumulation ash and the purpose of carbon distribution on carrier, the method equally can not reduce inactivation catalyst, and be washed to partial volume and be easily re-attached on carrier inside surface, cause cleaning performance undesirable.High-temperature steam reduction is after carrier has been cleaned by dedicated solvent, it is made to produce high temperature reductive gas heating around after-treatment system again, noble metal catalyst on reduction carrier, the method must use with medicament cleaning method simultaneously, operate more complicated, cleansing medium cannot reclaim use, environment easily causes secondary pollution, and cannot use the carrier structure of DPF type.
In sum, although existing after-treatment system cleans device, and single engine post-treatment apparatus is had certain effect, but it all cannot carry out ash disposal and noble metal catalyst reduction treatment to after-treatment system simultaneously, and it uses and often can only use and a kind of after-treatment device.
The present invention is directed to the blocking of electromotor difference after-treatment device and the reason of inactivation, devise the cleaning device of a kind of engine exhaust aftertreatment system, can be to TWC, DOC, DPF, the after-treatment devices such as SCR are carried out reducing with noble metal catalyst, it is by air, light water, ethanol, Chemical cleaning solvent or reducibility gas are as cleansing medium, utilize ultrasonic cavitation shock effect, by supersonic generator generation high-frequency and high-voltage oscillator signal, and oscillator signal is converted into mechanical vibration is passed in cleansing medium, the ultrasonic beam that ray is propagated is produced in continuously mode, constantly impact is cleaned by the surface of carrier inside micropore, blind hole and slit, ash carrier inside adhered to peels off, reach perfect cleaning performance；Additionally, chemical solvent or reducibility gas as cleansing medium can the effectively noble metal catalyst in reduction carrier coating, the carrying out of ultrasonic wave energy beneficially noble metal reaction, farthest reduce the activity of noble metal catalyst；Ultrasound wave also has emulsifying neutralization simultaneously, can more effectively prevent being cleaned by composition and be re-attached on carrier inside surface, reach preferable cleaning performance.
Summary of the invention
The purpose of the present invention aims to provide the cleaning device of a kind of engine exhaust aftertreatment system, to solve the carrier of engine aftertreatment system during using for a long time, the ash blocking often occurred and noble metal catalyst deactivation prob, prevent the carrier channel of ash blocking after-treatment system, cause after-treatment device clean-up effect and engine performance deterioration, avoid noble metal catalyst activity to reduce, cause after-treatment device purification efficiency to reduce.The cleaning device of engine exhaust aftertreatment system is to utilize the media such as air, light water, ethanol, Chemical cleaning solvent or reducibility gas to clean the cellular porous medium carrier of after-treatment system, the acoustic irradiation that cleansing medium will be provided by sonic generator, such that it is able to strengthen cleansing medium to the physics of carrier and Chemical cleaning effect, medium after simultaneously having cleaned will process in defecator and chemical reactor, prevent its secondary pollution to environment, be also convenient for it is recycled.
The invention provides the cleaning device of a kind of engine exhaust aftertreatment system, including cleansing medium, booster pump, heater, temperature sensor, pinger, post processing fixing device, seal washer, defecator, reactor, holding vessel, it is characterized in that: booster pump, heater, pinger, after-treatment device, defecator (, cleansing medium and holding vessel connected by pipeline, form the circulation cleaning system of a Guan Bi；Wherein: cleansing medium is placed in storage tank, storage tank outlet is connected by pipeline with booster pump entrance, booster pump outlet is connected by pipeline with calorifier inlets, heater is used for heated wash medium, temperature sensor is placed in the pipeline after the outlet of heater, for monitoring the temperature of cleansing medium；Pinger is positioned at the downstream of heater, and pinger is connected by pipeline and after-treatment device, and pinger provides acoustic vibration for cleansing medium；There are post processing fixing device and seal washer in the two ends of after-treatment device, and fixing device is fixed installation to unloading the after-treatment device got off on electromotor, and seal washer is used for preventing cleansing medium from leaking；Defecator is connected to the downstream of after-treatment device, and defecator is for filtering the ashy substance and waste particle thing being mingled with in cleansing medium after the property reduction cleaning carrier and catalyst；First branch road of defecator outlet is directly connected to holding vessel, and the second branch road of defecator outlet connects holding vessel after reactor.
The invention has the beneficial effects as follows:
(1) engine exhaust aftertreatment system cleans the device cleaning demand for different after-treatment systems, complete in the post processing cleaning way that ash is removed and noble metal catalyst reduces is incorporated in same device, the cleaning process of different after-treatment systems only need to use the rational cleansing medium of selection, acoustic irradiation frequency, boost pressure, heating-up temperature, further for needing to carry out the after-treatment system of composite cleaning, this device can complete to clean in two steps, first ash removing is carried out, then cleansing medium is changed, adjust device parameter, carry out catalyst activity reduction, therefore engine exhaust aftertreatment system cleaning device has feature applied widely.
(2) in ash cleaning scheme, the cleansing medium adding acoustic irradiation can effectively remove the ash of accumulation in porous media carrier inside micropore, blind hole and slit, there is cleaning performance good, cleannes are high, the feature that cleaning speed is fast, sound wave cleans and also has emulsifying, neutralization simultaneously, can more effectively prevent the ash being cleaned out to be re-attached to clean on carrier.
(3) in noble metal catalyst active reduction scheme, heater can effectively control the reaction temperature of reducing catalyst activity, stabilizing catalyst activity reduction process, the cleansing medium adding acoustic irradiation can utilize acoustic wave vibrations, accelerate active reduction course of reaction, can effectively reduce the concentration of chemical cleaning media hence with sound wave Cleaning principle, reduce the pollution that cleaning medium is likely to result in, reduce and clean cost.
(4) engine exhaust aftertreatment system cleans device in cleaning process, only need to confirm and adjust cleansing medium, frequency of sound wave, pressure limit, temperature range according to different after-treatment systems, then the after-treatment system under unloading on electromotor is sealingly mounted on cleaning equipment, its cleaning process is wash cycles, cleansing medium will not run off or leak, and it has the features such as simple to operate, safe and reliable.
(5) the waste residue material after the defecator in engine exhaust aftertreatment system cleaning device and reactor can effectively filter cleaning, and the dielectric solvent after reaction treatment cleaning, can the effectively wall cleansing medium secondary pollution to environment.
Accompanying drawing explanation
Fig. 1 is the cleaning device schematic diagram of engine exhaust aftertreatment system；
Fig. 2 is the cleaning device workflow diagram of engine exhaust aftertreatment system.
Wherein: 1-cleansing medium, 2-booster pump, 3-heater, 4-temperature sensor, 5-pinger, 6-post processing fixing device, 7-seal washer, 8-after-treatment device, 9-porous media carrier, 10-defecator, 11-reactor, 12-holding vessel, 13-reactor bypass valve, 14-single cycle control valve.
Specific implementation method
Mentioning specific embodiments of the present invention below in conjunction with the accompanying drawings, the embodiment of specific embodiments represents in the accompanying drawings and is described in more detail below.The present invention relates to the cleaning device of a kind of engine exhaust aftertreatment system, this device can remove the accumulation ash in all kinds of engine aftertreatment system carrier, the activity of reduction carrier noble metal surface catalyst effectively.
Cleaning device at engine exhaust aftertreatment system shown in Fig. 1 includes: cleansing medium 1, booster pump 2, heater 3, temperature sensor 4, pinger 5, post processing fixing device 6, seal washer 7, after-treatment device 8, porous media carrier 9, defecator 10, reactor 11, holding vessel 12, reactor bypass valve 13, single cycle control valve 14.
In specific implementation process, this device is the purging system of a circulation, and wherein booster pump 2, heater 3, pinger 5, after-treatment device 8, defecator 10, cleansing medium 11 and holding vessel 12 are connected by pipeline.Cleansing medium 1 is placed in storage tank 12.Booster pump 2 provides power resources for wash cycles process.Heater 3 and temperature sensor 4 to realizing computer heating control cleansing medium 1 temperature, can strengthen the effect of noble metal catalyst active reduction.Pinger 5 can be that cleansing medium 1 provides acoustic vibration, strengthens cleaning performance.It is fixing that the engine post-treatment apparatus 8 that need to clean can be sealed installation by post processing fixing device 6 and seal washer 7, prevents cleansing medium 1 from leaking.Defecator 10 filters the ashy substance that cleansing medium 1 washes, the reactivity of reactor 11 reduction cleaning medium 1, and defecator 10 and reactor 11 can prevent the cleansing medium 1 secondary pollution to environment.Reactor bypass valve 13 and single cycle control valve 14 realize the different cleanings to after-treatment device 8 by controlling circulation line.
In instances, cleansing medium 1 is placed in storage tank 12, it can be the one in the media such as air, light water, ethanol, Chemical cleaning solvent or reducibility gas, different cleaning solvents can realize the cleaning to different after-treatment devices, as air, light water, ethanol etc. can realize the cleaning of ash in carrier, Chemical cleaning solvent or reducibility gas can realize the reduction to noble metal catalyst activity.
Booster pump 2 is connected by pipeline and storage tank 12, in instances, the boost range of booster pump 2 is adjustable, it can select rational pressure limit according to the type of after-treatment system and physical dimension, remove carrying out effective ash and on the basis of catalyst activity reduction, prevent the destruction to post processing carrier and noble coatings.
Heater 3 is connected to after booster pump by pipeline, its Main Function is heated wash medium 1 temperature, temperature sensor 4 is placed in the rear end pipeline of heater 3, its Main Function is the temperature of monitoring cleansing medium 1, heater 3 and temperature sensor 4 can realize the control to cleansing medium 1 temperature, its object is to react for the active reduction of noble metal catalyst provide the reaction temperature being suitable for.
Pinger 5 is positioned at after heater, and connected by pipeline and after-treatment device 8, pinger 5 can be that cleansing medium 1 provides acoustic vibration, such as supersonic generator, its frequency of sound wave is adjustable, in actual use, ash can be strengthened remove and catalyst activity reduction effect according to the rational frequency of sound wave of post processing type and structure choice.
Post processing fixing device 6 and seal washer 7 is had at the two ends of after-treatment device 8, the Main Function of the two is the engine post-treatment apparatus 8 that need to clean to seal installation fix, fixing device 6 is to be fixed installation to unloading the after-treatment device 8 got off on electromotor, seal washer 7 Main Function is to seal, and prevents cleansing medium 1 from leaking.
Defecator 10 is connected to after after-treatment device 8, and cleansing medium 1 washes the ashy substance in carrier, and after the activity of reducing catalyst, the waste particle material wherein comprised can be prevented waste residue material to be expelled directly out polluting environment by defecator 10.
First branch road of defecator 10 outlet is directly connected to holding vessel 12, and the second branch road of defecator 10 outlet connects holding vessel 12 after reactor 11.Owing to cleansing medium 1 is after the activity of reducing catalyst, the concentration of its effective ingredient can reduce, and the Main Function of reactor 11 is the reactivity of reduction cleaning medium 1 or increases cleansing medium, prevents the cleansing medium 1 secondary pollution to environment simultaneously.
Reactor bypass valve 13 is placed in defecator 10 and the second branch road of reactor 11 connection, single cycle control valve 14 is placed in defecator 10 and the first branch road of storage tank 12 connection, cleaning type according to after-treatment device, determine whether reactor bypass valve 13 and single cycle control valve 14 open, thus control whether cleansing medium 1 passes into reactor 13.
Fig. 2 show the cleaning device workflow of engine exhaust aftertreatment system, in order to the different after-treatment devices of electromotor are effectively cleaned, needing to carry out the type of after-treatment device 8 class validation, segment cleaning process, its specific works flow process is as follows:
Step 1: dismounting engine post-treatment apparatus 8, confirms type and the architectural feature of after-treatment system, including after-treatment device 8 and carrier 9, and determines cleaning program and scavenging period, as ash is removed or noble metal catalyst active reduction.
Step 2: according to type and the architectural feature of after-treatment system, confirm the kind of cleansing medium 1, the pressure feed scope of booster pump 2, the acoustical range of pinger 5.
Step 3: install after-treatment device 8, the gas outlet of after-treatment device connects the pipe outlet of pinger 5, adds cleansing medium 1, adjust the pressure limit of booster pump 2 in holding vessel 12, the acoustical range of pinger 5, fills appropriate reacting substance in reactor 11.
Step 4: confirm that heater 3 is the need of unlatching according to cleansing medium a kind, and confirm rational temperature according to cleaning type, utilizing temperature sensor 4 to monitor the temperature of cleansing medium 1, the temperature adjusting cleansing medium 1 in real time makes it remain at rational temperature range.
Step 5: according to cleaning program, regulation reactor bypass valve 13 and the opening and closing mode of single cycle control valve 14.Cleaning program is divided into ash to remove and reduction two class of catalyst activity, and wherein ash cleaning program is as a example by the DPF without catalyst coatings cleans, and its need carry out ash cleaning, it is made without the reduction of catalyst activity, under this scenario, reactor bypass valve 13 cuts out, and single cycle control valve 14 is opened；The reduction scheme of catalyst activity is as a example by the cleaning of DOC, and its reduction needing to carry out catalyst activity, under this scenario, reactor bypass valve 13 is opened, and single cycle control valve 14 is closed.Remove and the reduction of catalyst activity if after-treatment system needs to carry out ash simultaneously, the most first carry out ash removing, after ash is removed, change cleansing medium 1, adjust booster pump 2 and pinger 5, then carry out the reduction of catalyst activity.
Step 6: arrange scavenging period, opens and cleans device, and clean cycle starts, and waits to be cleaned complete.
Description of the invention will combine exemplary specific embodiments, it is understood that current description not merely limits the invention in the specific embodiments that those are exemplary.On the contrary, it is intended to not only cover exemplary specific embodiments, include the various equivalents in the scope of the present invention defined in the appended claims and alternative form simultaneously.
Claims (6)
1. a cleaning device for engine exhaust aftertreatment system, increases including cleansing medium (1), booster pump (2)
Press pump (2), heater (3), temperature sensor (4), pinger (5), post processing fixing device (6),
Seal washer (7), defecator (10), reactor (11), holding vessel (12), it is characterised in that its feature exists
In: booster pump (2), heater (3), pinger (5), after-treatment device (8), defecator (10),
Cleansing medium (11) and holding vessel (12) are connected by pipeline, form the circulation cleaning system of a Guan Bi；
Wherein: cleansing medium (1) is placed in storage tank (12), storage tank (12) outlet enters with booster pump (2)
Mouth is connected by pipeline, and booster pump (2) outlet is connected by pipeline with heater (3) entrance, heater (3)
For heated wash medium (1), temperature sensor (4) is placed in the pipeline after the outlet of heater (3), uses
Temperature in monitoring cleansing medium (1)；Pinger (5) is positioned at the downstream of heater (3), acoustic emission
Device (5) is connected by pipeline and after-treatment device (8), and pinger (5) is cleansing medium (1) offer sound
Ripple vibrates；There are post processing fixing device (6) and seal washer (7), fixing device in the two ends of after-treatment device (8)
(6) being fixed installation to unloading the after-treatment device (8) got off on electromotor, seal washer (7) is used for preventing
Only cleansing medium (1) leakage；Defecator (10) is connected to the downstream of after-treatment device (8), defecator (10)
For filtering the ashy substance and waste particle being mingled with in cleansing medium (1) after the property reduction cleaning carrier and catalyst
Thing；The first branch road that defecator (10) exports is directly connected to holding vessel (12), and defecator (10) exports
Second branch road connects holding vessel (12) after reactor (11).
A kind of cleaning device of engine exhaust aftertreatment system, it is characterised in that
Also including reactor bypass valve (13) and single cycle control valve (14), wherein reactor bypass valve (13) was placed in
The second branch road between filter device (10) and reactor (11), described single cycle control valve (14) is placed in filtration dress
Put the first branch road between (10) and storage tank (12), reactor bypass valve (13) and single cycle control valve (14)
Whether open, be used for controlling whether cleansing medium (1) passes into reactor (11), thus determine after-treatment device
(8) liquidating plan.
The cleaning device of a kind of engine exhaust aftertreatment system, it is characterised in that clear
Wash medium (1) and the one in air, light water, ethanol, Chemical cleaning solvent or reducibility gas can be selected.
The cleaning device of a kind of engine exhaust aftertreatment system, it is characterised in that add
Hot device (3) and temperature sensor (4) are capable of the control to cleansing medium (1) temperature, for precious metal catalyst
The active reduction reaction of agent provides the reaction temperature being suitable for.
A kind of clean device the control method of engine exhaust aftertreatment system, its
It is characterised by, comprises the following steps:
Step 1: dismounting engine post-treatment apparatus (8), confirms type and the architectural feature of after-treatment system, and then
Determine cleaning program and scavenging period；
Step 2: according to type and the architectural feature of after-treatment system, confirm the kind of cleansing medium (1), supercharging
The pressure feed scope of pump (2), the acoustical range of pinger (5)；
Step 3: install after-treatment device (8), adds cleansing medium (1) in holding vessel (12), adjusts supercharging
The pressure limit of pump (2), adjusts the frequency of sound wave of pinger (5), fills reaction in reactor (11)
Material；
Step 4: according to cleansing medium (1) kind confirmation heater (3) the need of unlatching, and according to cleaning class
Type confirms that cleansing medium (1) is temperature required, utilizes the temperature of temperature sensor (4) monitoring cleansing medium (1),
And adjust the temperature of cleansing medium (1) in real time；
Step 5: according to cleaning program, controls reactor bypass valve (13) and the opening and closing of single cycle control valve (14)
Mode；
Step 6: arrange scavenging period, opens and cleans device, and clean cycle starts, and waits to be cleaned complete.
The control method cleaning device of a kind of engine exhaust aftertreatment system, it is special
Levying and be, cleaning program is divided into ash to remove and reduction two class of catalyst activity, wherein in ash cleaning scheme, instead
Answering device bypass valve (13) to close, single cycle control valve (14) is opened；In the reduction scheme of catalyst activity, reaction
Device bypass valve (13) is opened, and single cycle control valve (14) is closed.
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| CN201610194671.5A CN105880211B (en) | 2016-03-30 | 2016-03-30 | The cleaning device and its control method of carrier in engine exhaust aftertreatment system |
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| CN201610194671.5A CN105880211B (en) | 2016-03-30 | 2016-03-30 | The cleaning device and its control method of carrier in engine exhaust aftertreatment system |
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| CN105880211A true CN105880211A (en) | 2016-08-24 |
| CN105880211B CN105880211B (en) | 2018-07-06 |
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| CN107442508A (en) * | 2017-09-18 | 2017-12-08 | 无锡伟博汽车科技有限公司 | A kind of automated vehicle after-treatment device cleaning platform |
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| CN107890710B8 (en) * | 2017-11-03 | 2024-01-05 | 堃昊电子科技(江苏)有限公司 | DPF cleaning device based on ultrasonic cleaning |
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