CN110206615B - DPF carrier soot and ash cleaning device and cleaning method - Google Patents
DPF carrier soot and ash cleaning device and cleaning method Download PDFInfo
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- CN110206615B CN110206615B CN201910484032.6A CN201910484032A CN110206615B CN 110206615 B CN110206615 B CN 110206615B CN 201910484032 A CN201910484032 A CN 201910484032A CN 110206615 B CN110206615 B CN 110206615B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 98
- 239000004071 soot Substances 0.000 title claims abstract description 41
- 230000008569 process Effects 0.000 claims abstract description 68
- 239000000428 dust Substances 0.000 claims abstract description 59
- 238000010438 heat treatment Methods 0.000 claims abstract description 39
- 230000008929 regeneration Effects 0.000 claims abstract description 33
- 238000011069 regeneration method Methods 0.000 claims abstract description 33
- 238000005259 measurement Methods 0.000 claims abstract description 32
- 239000011261 inert gas Substances 0.000 claims abstract description 29
- 238000007664 blowing Methods 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 44
- 238000011144 upstream manufacturing Methods 0.000 claims description 29
- 229910052757 nitrogen Inorganic materials 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 16
- 239000004215 Carbon black (E152) Substances 0.000 claims description 6
- 229930195733 hydrocarbon Natural products 0.000 claims description 6
- 150000002430 hydrocarbons Chemical class 0.000 claims description 6
- 238000003745 diagnosis Methods 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 239000013618 particulate matter Substances 0.000 description 4
- 239000000969 carrier Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
-
- 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
- F01N3/0232—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 removing incombustible material from a particle filter, e.g. ash
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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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
A DPF carrier soot and ash cleaning apparatus and cleaning method, comprising: the system comprises a measurement and control system, an air heating system, a blowing system, an air flow control system, an inert gas generation system, a bracket system and a dust removal system; the measurement and control system is connected with the air heating system and the air blowing system through power lines, and the measurement and control system is sequentially connected with the air heating system, the air blowing system, the air flow control system, the inert gas generation system and the bracket system through an industrial personal computer control wire harness; the air blowing system is connected with the air heating system and the inert gas generating system through the gas connecting pipe; the air heating system and the inert gas generation system are connected with the bracket system; the bracket system is connected with the dust removal system through an exhaust connecting pipe and a cleaning method. The adopted cleaning method can meet the requirement of active regeneration safety under any carbon loading condition, is easy to operate, and can collect soot and ash in the whole cleaning process, so that secondary pollutants can not be generated.
Description
Technical field: the invention belongs to the technical field of diesel engine exhaust emission aftertreatment, and relates to a DPF carrier soot and ash cleaning device
A cleaning method.
The background technology is as follows:
as is well known, diesel engines are becoming increasingly popular for their high thermal efficiency, good reliability and durability. At present, the emission regulations of six road countries and four non-road countries in China strictly limit the particulate matter mass emission and the particulate matter quantity emission of diesel engines, and increasingly strict emission regulations force diesel engine manufacturers to install a particulate trap to reduce the particulate matter mass emission and the particulate matter quantity emission.
The particle catcher (Diesel Particulate Filter, abbreviated as DPF) is one of the most effective means for solving the problem of diesel particulate emission, which is currently accepted, by trapping the particles in the exhaust gas of the engine in the filter structure through the filter material.
In the use process of the DPF, the particulate matters trapped in the filter body are removed through continuous regeneration or periodic regeneration, so that the pressure drop of the DPF is kept within a reasonable range, and the DPF and the engine are ensured to be in a normal working state. However, ash in the DPF carrier cannot be burned out during the regeneration process of the DPF, and a large amount of ash is accumulated in the DPF carrier over a long period of time, and the accumulation of ash in the DPF significantly affects the pressure drop, filtration and regeneration characteristics of the DPF, resulting in deterioration of engine operation performance.
Therefore, how to clean soot and ash in the DPF carrier is important to improve the actual filtering efficiency of the DPF, reduce the regeneration frequency, prolong the service life of the DPF, reduce the later maintenance cost, reduce the power loss of the engine and reduce the fuel consumption.
The invention comprises the following steps:
the invention aims to provide the DPF carrier soot and ash cleaning device and the DPF carrier soot and ash cleaning method which have the advantages of compact structure, convenience in disassembly and assembly and strong universality and can meet the requirement of active regeneration safety under any carbon loading condition.
To achieve the above object, the present invention provides a DPF carrier soot and ash cleaning device comprising: the system comprises a measurement and control system, an air heating system, a blowing system, an air flow control system, an inert gas generation system, a bracket system and a dust removal system; the measurement and control system is connected with the air heating system and the air blowing system through power lines, and the measurement and control system is sequentially connected with the air heating system, the air blowing system, the air flow control system, the inert gas generation system and the bracket system through an industrial personal computer control wire harness; the air blowing system is connected with the air heating system and the inert gas generating system through the gas connecting pipe; the air heating system and the inert gas generation system are connected with the bracket system; the bracket system is connected with the dust removal system through an exhaust connecting pipe.
The measurement and control system comprises: the power line, the industrial personal computer and the industrial personal computer control the wiring harness; one end of a power line in the measurement and control system is connected with a 220V alternating current power supply, and the other end of the power line is connected with an industrial personal computer in the measurement and control system, a high-temperature hot air gun controller in the air heating system and a variable-frequency fan controller in the air blowing system; the industrial personal computer in the measurement and control system is connected with a variable frequency fan controller in the blowing system, a cold air channel throttle valve in the air flow control system, a hot air channel throttle valve in the air flow control system, a high-temperature hot air gun controller in the air heating system, an upstream temperature sensor in the bracket system, a downstream temperature sensor in the bracket system, an upstream and downstream differential pressure sensor in the bracket system and a nitrogen generator in the inert gas generation system through an industrial personal computer control wire harness.
The air heating system includes: a high temperature hot air gun controller, a high temperature hot air gun control line, a high temperature hot air gun and a high temperature hot air gun outlet temperature sensor; one end of the high-temperature hot air gun controller is connected with an industrial personal computer in the measurement and control system through an industrial personal computer control wire harness, and the other end of the high-temperature hot air gun controller is connected with a high-temperature hot air gun and a high-temperature hot air gun outlet temperature sensor through a high-temperature hot air gun control wire.
The blower system includes: the variable frequency fan control device comprises a variable frequency fan controller, a variable frequency fan control line, a variable frequency fan and an air flow sensor; one end of the variable frequency fan controller is connected with an industrial personal computer in the measurement and control system through an industrial personal computer control wire harness, and the other end of the variable frequency fan controller is connected with the variable frequency fan and the air flow sensor through a variable frequency fan control wire.
The airflow control system includes: a cold air channel throttle valve and a hot air channel throttle valve; one end of a cold air channel throttle valve is connected with a variable frequency fan of the air blowing system, and the other end of the cold air channel throttle valve is connected with a nitrogen generator in the inert gas generation system; one end of a hot air channel throttle valve in the air flow control system is connected with a variable frequency fan of the air blowing system, and the other end of the hot air channel throttle valve is connected with a high-temperature hot air gun in the air heating system.
The inert gas generation system includes: a nitrogen generator; one end of the nitrogen generator is connected with the cold air channel throttle valve, and the other end of the nitrogen generator is connected with the cold and hot air mixer in the bracket system.
The stent system comprises: an upstream temperature sensor, a downstream temperature sensor, an upstream and downstream pressure difference sensor, an exhaust connecting pipe, a cold and hot gas mixer and a DPF carrier to be cleaned; the upstream temperature sensor, the downstream temperature sensor and the upstream and downstream pressure difference sensor are respectively connected with an industrial personal computer control wire harness in the measurement and control system; one end of the cold and hot gas mixer is connected with a high-temperature hot air gun in the air heating system and a nitrogen generator in the inert gas generating system, and the other end of the cold and hot gas mixer is connected with a DPF carrier to be cleaned; one end of the exhaust connecting pipe is connected with the DPF carrier to be cleaned, and the other end of the exhaust connecting pipe is connected with a cyclone dust collector in the dust removal system.
The dust removal system includes: dust collectors and cyclone dust collectors; one end of the cyclone dust collector is connected with an exhaust connecting pipe in the bracket system, and the other end of the cyclone dust collector is connected with the dust collector.
The invention provides a DPF carrier soot and ash cleaning method, which comprises the following specific steps:
【1】 Firstly, reading a current fault code about a DPF carrier to be cleaned in a diesel engine controller through fault diagnosis equipment, and dividing a cleaning method of the DPF carrier to be cleaned into a serious blockage cleaning method, a slight blockage cleaning method, a normal regeneration alarm cleaning method and a single ash removal mode cleaning method according to the fault code;
【2】 In the cleaning process of the four cleaning methods, the industrial personal computer monitors and performs closed-loop control on the cleaning process by controlling the working processes of the high-temperature hot air gun controller, the variable-frequency fan controller, the cold air channel throttle valve and the hot air channel throttle valve according to feedback of an upstream temperature sensor, a downstream temperature sensor and an upstream and downstream pressure difference sensor;
【3】 The industrial personal computer adopts a programmable and modularized control program, and the main control program comprises the following modules:
(1) And a normal temperature cleaning module: and setting 200-800 kg/h of required air quantity and 5-30 minutes of required air quantity duration on the industrial personal computer, and then transmitting the required air quantity to the variable frequency fan controller by the industrial personal computer through the industrial personal computer control wiring harness. The variable frequency fan controller is connected with the variable frequency fan and the air flow sensor through a variable frequency fan control line, the air flow sensor feeds the real-time air quantity of the variable frequency fan back to the variable frequency fan controller through the variable frequency fan control line, the variable frequency fan controller adjusts the working process of the variable frequency fan in a closed loop mode through the variable frequency fan control line according to the real-time air quantity fed back by the air flow sensor, and finally, the control process that the real-time air quantity of the variable frequency fan is consistent with the required air quantity is realized; after the cleaning process is started, the cold air channel throttle valve is in a normally closed state, the hot air channel throttle valve is in a normally opened state, the high-temperature hot air gun does not heat the normal-temperature air flowing through the cold air channel throttle valve, normal-temperature air flow reversely sweeps DPF carriers to be cleaned, and then the cyclone dust collector captures the swept particles and ash in the dust collector;
(2) And a medium-low temperature cleaning module: setting 200-800 kg/h of required air quantity, 200-250 ℃ of required air quantity temperature and 5-30 minutes of required air quantity duration on an industrial personal computer, and then sending the required air quantity and the required air quantity duration to a variable frequency fan controller by the industrial personal computer through an industrial personal computer control wire harness, wherein an air flow sensor of the variable frequency fan controller detects the actual air quantity of the variable frequency fan to control the working process of the variable frequency fan in a closed loop manner, so that the actual air quantity of the variable frequency fan reaches the required air quantity; the industrial personal computer sends the required air volume temperature to the high-temperature hot air gun controller through the industrial personal computer control wire harness, and the high-temperature hot air gun controller performs closed-loop control on the working process of the high-temperature hot air gun according to the actual air outlet temperature of the high-temperature hot air gun, which is measured by the high-temperature hot air gun outlet temperature sensor, so that the actual air outlet temperature of the high-temperature hot air gun reaches the required air volume temperature. After the cleaning process is started, the cold air channel throttle valve is in a normally closed state, the hot air channel throttle valve is in a normally opened state, the high-temperature hot air gun heats normal-temperature air flowing through the cold air channel throttle valve, the heated air flow reversely sweeps and heats DPF carriers to be cleaned, and then the cyclone dust collector captures the particles and ash which are swept away in the dust collector;
(3) Medium-high temperature cleaning module: setting 200-800 kg/h of required air quantity, 400-450 ℃ of required air quantity temperature and 5-30 minutes of required air quantity duration on an industrial personal computer, and then sending the required air quantity and the required air quantity duration to a variable frequency fan controller by the industrial personal computer through an industrial personal computer control wire harness, wherein an air flow sensor of the variable frequency fan controller detects the actual air quantity of the variable frequency fan to control the working process of the variable frequency fan in a closed loop manner, so that the actual air quantity of the variable frequency fan reaches the required air quantity; the industrial personal computer sends the required air volume temperature to the high-temperature hot air gun controller through the industrial personal computer control wire harness, and the high-temperature hot air gun controller performs closed-loop control on the working process of the high-temperature hot air gun according to the actual air outlet temperature of the high-temperature hot air gun, which is measured by the high-temperature hot air gun outlet temperature sensor, so that the actual air outlet temperature of the high-temperature hot air gun reaches the required air volume temperature. After the cleaning process is started, the cold air channel throttle valve is in a normally closed state, the hot air channel throttle valve is in a normally opened state, the high-temperature hot air gun heats normal-temperature air flowing through the cold air channel throttle valve, the heated air flow reversely sweeps and heats DPF carriers to be cleaned, and then the cyclone dust collector captures the particles and ash which are swept away in the dust collector;
(4) And a high-temperature cleaning module: setting 200-800 kg/h of required air quantity, 600-650 ℃ of required air quantity temperature and 5-30 minutes of required air quantity duration on an industrial personal computer, and then sending the required air quantity and the required air quantity duration to a variable frequency fan controller by the industrial personal computer through an industrial personal computer control wire harness, wherein an air flow sensor of the variable frequency fan controller detects the actual air quantity of the variable frequency fan to control the working process of the variable frequency fan in a closed loop manner, so that the actual air quantity of the variable frequency fan reaches the required air quantity; the industrial personal computer sends the required air volume temperature to the high-temperature hot air gun controller through the industrial personal computer control wire harness, and the high-temperature hot air gun controller performs closed-loop control on the working process of the high-temperature hot air gun according to the actual air outlet temperature of the high-temperature hot air gun, which is measured by the high-temperature hot air gun outlet temperature sensor, so that the actual air outlet temperature of the high-temperature hot air gun reaches the required air volume temperature. After the cleaning process is started, the cold air channel throttle valve is in a normally closed state, the hot air channel throttle valve is in a normally opened state, the high-temperature hot air gun heats normal-temperature air flowing through the cold air channel throttle valve, the heated air flow reversely sweeps, heats and burns internal soot to the DPF carrier to be cleaned, and then the particles and ash which are swept away are captured in the dust collector by the cyclone dust collector;
【4】 If the DPF carrier to be cleaned is seriously blocked, firstly sequentially calling a normal temperature cleaning module, a medium and low temperature cleaning module and a medium and high temperature cleaning module to clean soot and unburned hydrocarbon of the DPF carrier to be cleaned, and reducing the carbon loading of the DPF carrier to be cleaned to be within a safe regeneration range; then, a high-temperature cleaning module is called to conduct active regeneration, and residual soot in the DPF carrier to be cleaned is burnt; finally, sequentially calling a medium-high temperature cleaning module and a medium-low temperature cleaning module to clean ash content of the DPF carrier to be cleaned;
【5】 If the DPF carrier to be cleaned is slightly blocked, firstly sequentially calling a normal temperature cleaning module and a medium-low temperature cleaning module to clean the soot and unburned hydrocarbon of the DPF carrier to be cleaned, and reducing the carbon loading of the DPF carrier to be cleaned to be within a safe regeneration range; then, a high-temperature cleaning module is called to conduct active regeneration, and residual soot in the DPF carrier to be cleaned is burnt; finally, sequentially calling a medium-high temperature cleaning module and a medium-low temperature cleaning module to clean ash content of the normal-temperature cleaning module;
【6】 If the DPF carrier to be cleaned is normal regeneration alarm, directly calling a high-temperature cleaning module to perform active regeneration, and burning the residual soot in the DPF carrier to be cleaned; then sequentially calling a medium-high temperature cleaning module and a medium-low temperature cleaning module to clean ash content of the DPF carrier to be cleaned;
【7】 And if the DPF carrier to be cleaned is the ash cleaning alarm, sequentially calling a medium-high temperature cleaning module and a medium-low temperature cleaning module to clean ash of the DPF carrier to be cleaned.
The following beneficial effects can be achieved by adopting the technical scheme of the invention: DPF carrier soot and ash cleaning device
Reasonable in design, compact structure, easy dismounting, the commonality is strong, can satisfy different size DPF carrier clearance demands. At the same time, the device
The device can be used as a device for cleaning ash in the DPF, so that the actual filtering efficiency of the DPF is improved, the regeneration frequency is reduced, and the service life of the DPF is prolonged; the device can be used as an active regeneration device of a service station in the DPF after-sale service process, the adopted cleaning method can meet the requirement of active regeneration safety under the condition of any carbon loading, the operation is easy, and meanwhile, the carbon smoke and ash are collected in the whole cleaning process, so that secondary pollutants are not generated.
Description of the drawings:
FIG. 1 is a schematic diagram of the main system architecture of a DPF carrier soot and ash cleaning device of the present invention;
FIG. 2 is a schematic diagram of a specific system architecture of a DPF carrier soot and ash cleaning device of the present invention.
The specific embodiment is as follows:
the invention is further described below with reference to the drawings and examples, and the object of the invention is to provide a device and a method for cleaning soot and ash on a DPF carrier, which is compact in structure, safe and reliable, and convenient to operate.
In order to achieve the above object, the present invention provides a DPF carrier soot and ash cleaning device, comprising: the system comprises a measurement and control system S10, an air heating system S20, a blowing system S30, an air flow control system S40, an inert gas generation system S50, a bracket system S60 and a dust removal system S70.
The measurement and control system S10 is connected with the air heating system S20 and the air blowing system S30 through power lines 1, and is sequentially connected with the air heating system S20, the air blowing system S30, the air flow control system S40, the inert gas generation system S50 and the bracket system S60 through an industrial personal computer control wire harness 6; the air blowing system S30 is connected with the air heating system S20 and the inert gas generating system S50 through a gas connecting pipe; the air heating system S20 and the inert gas generation system S50 are connected with the bracket system S60; the rack system S60 is connected to the dust removal system S70 through the exhaust connection pipe 11.
The measurement and control system S10 includes: the power line 1, the industrial personal computer 2 and the industrial personal computer control wiring harness 6; one end of a power line 1 in the measurement and control system S10 is connected with a 220V alternating current power supply, and the other end of the power line 1 is connected with an industrial personal computer 2 in the measurement and control system S10, a high-temperature hot air gun controller 3 in the air heating system S20 and a variable-frequency fan controller 4 in the air blowing system S30, and supplies power to the devices. The industrial personal computer 2 in the measurement and control system S10 is connected with the variable frequency fan controller 4 in the air blowing system S30, the cold air channel throttle valve 14 in the air flow control system S40, the hot air channel throttle valve 15 in the air flow control system S40, the high-temperature hot air gun controller 3 in the air heating system S20, the upstream temperature sensor 8 in the bracket system S60, the downstream temperature sensor 9 in the bracket system S60, the upstream and downstream differential pressure sensor 10 in the bracket system S60 and the nitrogen generator 17 in the inert gas generation system S50 through the industrial personal computer control wire harness 6. The industrial personal computer 2 sends out an air quantity demand instruction to the fan variable frequency fan controller 4 according to different cleaning demands, the high-temperature hot air gun controller 3 sends out a temperature demand instruction, and meanwhile, the current cleaning process is subjected to closed-loop control and the progress of the cleaning process is judged according to feedback of the upstream temperature sensor 8, the downstream temperature sensor 9 and the upstream and downstream temperature difference sensor 10, so that the whole cleaning process is ensured to be safe and controllable.
The air heating system S20 includes: a high temperature hot air gun controller 3, a high temperature hot air gun control line 7, a high temperature hot air gun 16 and a high temperature hot air gun outlet temperature sensor 18.
One end of a high-temperature hot air gun controller 3 in the air heating system S20 is connected with the industrial personal computer 2 in the measurement and control system S10 through an industrial personal computer control wire harness 6, and the other end of the high-temperature hot air gun controller 3 is connected with a high-temperature hot air gun 16 and a high-temperature hot air gun outlet temperature sensor 18 through a high-temperature hot air gun control wire 7. After receiving the temperature demand instruction sent by the industrial personal computer 2, the high-temperature hot air gun controller 3 performs closed-loop control on the actual outlet temperature of the high-temperature hot air gun 16 according to the feedback of the high-temperature hot air gun outlet temperature sensor 18, so as to meet the air heating demand.
The blower system S30 includes: a variable frequency fan controller 4, a variable frequency fan control line 5, a variable frequency fan 12 and an air flow sensor 13.
One end of a variable frequency fan controller 4 in the blower system S30 is connected with the industrial personal computer 2 in the measurement and control system S10 through an industrial personal computer control wire harness 6, and the other end of the variable frequency fan controller 4 is connected with a variable frequency fan 12 and an air flow sensor 13 through a variable frequency fan control wire 5. After the variable frequency fan controller 4 receives the air quantity demand instruction of the industrial personal computer 2, the actual flow of the outlet of the variable frequency fan 12 is subjected to closed-loop control according to the feedback of the air flow meter 13, so that the air quantity demand in the cleaning process is met.
The airflow control system S40 includes: a cold air passage throttle valve 14 and a hot air passage throttle valve 15; one end of a cold air channel throttle valve 14 in the air flow control system S40 is connected with a variable frequency fan 12 of the blower system S30, and the other end of the cold air channel throttle valve 14 is connected with a nitrogen generator 17 in the inert gas generation system S50; one end of a hot air channel throttle valve 15 in the air flow control system S40 is connected with a variable frequency fan 12 of the blower system S30, and the other end of the hot air channel throttle valve 15 is connected with a high-temperature hot air gun 16 in the air heating system S20. The industrial personal computer 2 adjusts the opening degrees of the cold air channel throttle valve 14 and the hot air channel throttle valve 15 according to different cleaning requirements and process control requirements.
The inert gas generation system S50 includes: nitrogen generator 17.
One end of a nitrogen generator 17 in the inert gas generation system S50 is connected with the cold air channel throttle valve 14, and the other end of the nitrogen generator 17 is connected with the cold and hot gas mixer 19 in the bracket system S60. The nitrogen generator 17 starts to work under the condition that the temperature is too high in the active regeneration process of the DPF carrier 20 to be cleaned, and the self-ignition process of soot is prevented by reducing the oxygen content in the DPF carrier 20 to be cleaned, so that the damage to the carrier and the catalyst caused by high temperature can be effectively prevented.
The rack system S60 includes: an upstream temperature sensor 8, a downstream temperature sensor 9, an upstream-downstream differential pressure sensor 10, an exhaust connection pipe 11, a cold-hot gas mixer 19 and a DPF carrier 20 to be cleaned.
An upstream temperature sensor 8, a downstream temperature sensor 9 and an upstream and downstream differential pressure sensor 10 in the bracket system S60 are connected with an industrial personal computer control wire harness 6 in the measurement and control system S10; one end of the cold and hot gas mixer 19 is connected with the air heating system S20
The hot air gun 16 is connected with the nitrogen generator 17 in the inert gas generation system S50, and the other end of the cold and hot gas mixer 19 is connected with the DPF carrier 20 to be cleaned; one end of the exhaust connection pipe 11 is connected with the DPF carrier 20 to be cleaned, and one end of the exhaust connection pipe 11 is connected with the cyclone dust collector 22 in the dust removal system S70.
The requirement of the mounting direction of the DPF carrier 20 to be cleaned on the DPF carrier soot and ash cleaning device is that the air flow direction of the DPF carrier 20 to be cleaned is opposite to the air flow direction of the DPF carrier soot and ash cleaning device in the working process.
The cold and hot gas mixer 19 has a series of modified designs, which are the same as the size of the junction of the hot air gun 16 and the nitrogen generator 17, and the size of the junction with the outlet end of the DPF carrier 20 to be cleaned is designed according to the size of the DPF carrier 20 to be cleaned. Therefore, the requirements of differentiation and diversity can be met, the universality of the equipment is improved, and the development cost and the development period of the equipment are reduced.
One end of the exhaust connecting pipe 11 is connected with the inlet end of the DPF carrier 20 to be cleaned, and one end of the exhaust connecting pipe 11 is connected with the cyclone dust collector 22. There are a series of modified designs for the exhaust connection pipe 11, which are the same as the size of the connection of the cyclone 22, and the size of the connection with the inlet end of the DPF carrier 20 to be cleaned is designed according to the size of the DPF carrier 20 to be cleaned. Therefore, the requirements of differentiation and diversity can be met, the universality of the equipment is improved, and the development cost and the development period of the equipment are reduced.
The dust removing system S70 includes: a dust collector 21 and a cyclone 22.
One end of the cyclone dust collector 22 in the dust removing system S70 is connected with the exhaust connecting pipe 11 in the bracket system S60, and the other end of the cyclone dust collector 22 is connected with the dust collector 21. The dust collector 21 is installed in cyclone 22 bottom, and cyclone 22 can be with waiting to clear up soot and ash content in the DPF carrier 20 cleaning process through the effectual entrapment of centrifugal action, then collects in dust collector 21, has avoided soot and ash content direct exhaust air to cause secondary pollution in the cleaning process.
The invention provides a DPF carrier soot and ash cleaning method, which comprises the following specific steps: firstly, the current fault code about the DPF carrier 20 to be cleaned in a diesel engine controller is read through fault diagnosis equipment, and the cleaning method of the DPF carrier 20 to be cleaned is divided into a serious blockage cleaning method, a slight blockage cleaning method, a normal regeneration alarm cleaning method and a single ash removal mode cleaning method according to the fault code.
In the cleaning process of the four cleaning methods, the industrial personal computer 2 monitors and performs closed-loop control on the cleaning process according to feedback of the upstream temperature sensor 8, the downstream temperature sensor 9 and the upstream and downstream differential pressure sensor 10 by controlling the working processes of the high-temperature hot air gun controller 3, the variable frequency fan controller 4, the cold air channel throttle valve 14 and the hot air channel throttle valve 15.
The industrial personal computer 2 adopts a programmable and modularized control program, and the main control program comprises the following modules:
(1) And a normal temperature cleaning module: 200-800 kg/h of required air quantity and 5-30 minutes of required air quantity duration are set on the industrial personal computer 2, and then the industrial personal computer 2 sends the required air quantity to the variable frequency fan controller 4 through the industrial personal computer control wire harness 6. The variable frequency fan controller 4 is connected with the variable frequency fan 12 and the air flow sensor 13 through the variable frequency fan control line 5, the air flow sensor 13 feeds the real-time air quantity of the variable frequency fan 12 back to the variable frequency fan controller 4 through the variable frequency fan control line 5, the variable frequency fan controller 4 adjusts the working process of the variable frequency fan 12 in a closed loop mode through the variable frequency fan control line 5 according to the real-time air quantity fed back by the air flow sensor 13, and finally the control process that the real-time air quantity and the required air quantity of the variable frequency fan 12 are consistent is realized. After the cleaning process is started, the cold air channel throttle valve 14 is in a normally closed state, the hot air channel throttle valve 15 is in a normally opened state, the high-temperature hot air gun 16 does not heat the normal-temperature air flowing through the cold air channel throttle valve, normal-temperature air flow reversely sweeps the DPF carrier 20 to be cleaned, and then the cyclone dust collector 22 captures the swept particles and ash in the dust collector 21.
(2) And a medium-low temperature cleaning module: setting 200-800 kg/h of required air quantity, 200-250 ℃ of required air quantity temperature and 5-30 minutes of required air quantity duration on the industrial personal computer 2, and then sending the required air quantity and the required air quantity duration to the variable frequency fan controller 4 by the industrial personal computer 2 through the industrial personal computer control wire harness 6, wherein the actual air quantity of the variable frequency fan 12 is measured by the air flow sensor 13 of the variable frequency fan controller 4 to control the working process of the variable frequency fan 12 in a closed loop manner, so that the actual air quantity of the variable frequency fan 12 reaches the required air quantity; the industrial personal computer 2 sends the required air volume temperature to the high-temperature hot air gun controller 3 through the industrial personal computer control wire harness 6, and the high-temperature hot air gun controller 3 performs closed-loop control on the working process of the high-temperature hot air gun 16 according to the actual air outlet temperature of the high-temperature hot air gun 16 measured by the high-temperature hot air gun outlet temperature sensor 18, so that the actual air outlet temperature of the high-temperature hot air gun 16 reaches the required air volume temperature. After the cleaning process is started, the cold air channel throttle valve 14 is in a normally closed state, the hot air channel throttle valve 15 is in a normally opened state, the high-temperature hot air gun 16 heats the normal-temperature air flowing through the cold air channel throttle valve, the heated air flow reversely sweeps and heats the DPF carrier 20 to be cleaned, and then the cyclone dust collector 22 traps the swept particles and ash in the dust collector 21.
(3) Medium-high temperature cleaning module: setting 200-800 kg/h of required air quantity, 400-450 ℃ of required air quantity temperature and 5-30 minutes of required air quantity duration on the industrial personal computer 2, and then sending the required air quantity and the required air quantity duration to the variable frequency fan controller 4 by the industrial personal computer 2 through the industrial personal computer control wire harness 6, wherein the actual air quantity of the variable frequency fan 12 is measured by the air flow sensor 13 of the variable frequency fan controller 4 to control the working process of the variable frequency fan 12 in a closed loop manner, so that the actual air quantity of the variable frequency fan 12 reaches the required air quantity; the industrial personal computer 2 sends the required air volume temperature to the high-temperature hot air gun controller 3 through the industrial personal computer control wire harness 6, and the high-temperature hot air gun controller 3 performs closed-loop control on the working process of the high-temperature hot air gun 16 according to the actual air outlet temperature of the high-temperature hot air gun 16 measured by the high-temperature hot air gun outlet temperature sensor 18, so that the actual air outlet temperature of the high-temperature hot air gun 16 reaches the required air volume temperature. After the cleaning process is started, the cold air channel throttle valve 14 is in a normally closed state, the hot air channel throttle valve 15 is in a normally opened state, the high-temperature hot air gun 16 heats the normal-temperature air flowing through the cold air channel throttle valve, the heated air flow reversely sweeps and heats the DPF carrier 20 to be cleaned, and then the cyclone dust collector 22 traps the swept particles and ash in the dust collector 21.
(4) And a high-temperature cleaning module: setting 200-800 kg/h of required air quantity, 600-650 ℃ of required air quantity temperature and 5-30 minutes of required air quantity duration on the industrial personal computer 2, and then sending the required air quantity and the required air quantity duration to the variable frequency fan controller 4 by the industrial personal computer 2 through the industrial personal computer control wire harness 6, wherein the actual air quantity of the variable frequency fan 12 is measured by the air flow sensor 13 of the variable frequency fan controller 4 to control the working process of the variable frequency fan 12 in a closed loop manner, so that the actual air quantity of the variable frequency fan 12 reaches the required air quantity; the industrial personal computer 2 sends the required air volume temperature to the high-temperature hot air gun controller 3 through the industrial personal computer control wire harness 6, and the high-temperature hot air gun controller 3 performs closed-loop control on the working process of the high-temperature hot air gun 16 according to the actual air outlet temperature of the high-temperature hot air gun 16 measured by the high-temperature hot air gun outlet temperature sensor 18, so that the actual air outlet temperature of the high-temperature hot air gun 16 reaches the required air volume temperature. After the cleaning process is started, the cold air channel throttle valve 14 is in a normally closed state, the hot air channel throttle valve 15 is in a normally opened state, the high-temperature hot air gun 16 heats the normal-temperature air flowing through the cold air channel throttle valve, the heated air flow reversely sweeps, heats and burns the internal soot process of the DPF carrier 20 to be cleaned, and then the dust collector 21 captures the swept particles and ash by the cyclone dust collector 22.
In the high-temperature cleaning stage, as the DPF carrier 20 to be cleaned is continuously heated by the air flow at 600-650 ℃, when the internal temperature of the DPF carrier 20 to be cleaned reaches 600-650 ℃, the interior of the DPF carrier 20 to be cleaned is subjected to an active regeneration process, the trapped soot particles are subjected to an spontaneous combustion process, the temperature measured by the upstream temperature sensor 8 continuously rises, and if the temperature measured by the upstream temperature sensor 8 is not higher than 750 ℃ all the time, the air flow at 600-650 ℃ is continuously kept to be purged until the high-temperature cleaning process is finished. If the temperature measured by the upstream temperature sensor 8 exceeds 750 ℃, the industrial personal computer 2 pauses timing, pauses the heating process of the high-temperature heat gun 16 by the high-temperature heat gun controller 3, closes the hot air passage throttle valve 15, opens the cold air passage throttle valve 14 and controls the working process of the nitrogen generator 17. Through the series of control processes, the spontaneous combustion process of soot particles in the DPF carrier 20 to be cleaned can be rapidly restrained, meanwhile, the DPF carrier 20 to be cleaned is cooled by utilizing normal-temperature air flow, when the temperature measured by the upstream temperature sensor 8 is lower than 550 ℃, the industrial personal computer 2 continues the timing process, closes the cold air channel throttle valve 14, stops the working process of the nitrogen generator 17, opens the hot air channel throttle valve 15, controls the high-temperature hot air gun controller 3 to heat the high-temperature hot air gun 16, and again heats the air flowing through the high-temperature hot air gun 16 to 600-650 ℃ to continue the high-temperature cleaning process.
If the DPF carrier 20 to be cleaned is seriously blocked, firstly sequentially calling a normal temperature cleaning module, a medium and low temperature cleaning module and a medium and high temperature cleaning module to clean the carbon smoke and unburned hydrocarbon of the DPF carrier 20 to be cleaned, and reducing the carbon load of the DPF carrier 20 to be cleaned to be within a safe regeneration range; then, a high-temperature cleaning module is called to conduct active regeneration, and residual soot in the DPF carrier 20 to be cleaned is burnt; and finally, sequentially calling a medium-high temperature cleaning module and a medium-low temperature cleaning module to clean ash of the DPF carrier 20 to be cleaned.
If the DPF carrier 20 to be cleaned is slightly blocked, firstly sequentially calling a normal temperature cleaning module and a medium-low temperature cleaning module to clean soot and unburned hydrocarbon of the DPF carrier 20 to be cleaned, and reducing the carbon loading of the DPF carrier 20 to be cleaned to be within a safe regeneration range; then, a high-temperature cleaning module is called to conduct active regeneration, and residual soot in the DPF carrier 20 to be cleaned is burnt; and finally, sequentially calling the medium-high temperature cleaning module and the medium-low temperature cleaning module to clean ash content of the normal-temperature cleaning module.
If the DPF carrier 20 to be cleaned is normal regeneration alarm, directly calling a high-temperature cleaning module to perform active regeneration, and burning the residual soot in the DPF carrier 20 to be cleaned; and then sequentially calling a medium-high temperature cleaning module and a medium-low temperature cleaning module to clean ash of the DPF carrier 20 to be cleaned.
If the DPF carrier 20 to be cleaned is the ash cleaning alarm, sequentially calling a medium-high temperature cleaning module and a medium-low temperature cleaning module to clean ash of the DPF carrier 20 to be cleaned.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the entire contents of the present invention, but although the present invention has been described in detail with reference to the foregoing embodiment, it will be apparent to those skilled in the art that modifications may be made in the form of the technical solution described in the foregoing embodiment, or that equivalents may be substituted for some of the technical features thereof. Modifications, equivalents, and the like, which are all intended to be included within the spirit and scope of the present invention, are intended to be included within the scope of the present invention.
Claims (2)
1. A DPF carrier soot and ash cleaning device comprising: the system comprises a measurement and control system (S10), an air heating system (S20), a blowing system (S30), an air flow control system (S40), an inert gas generation system (S50), a bracket system (S60) and a dust removal system (S70); the measurement and control system (S10) is connected with the air heating system (S20) and the air blowing system (S30) through a power line (1), and the measurement and control system (S10) is sequentially connected with the air heating system (S20), the air blowing system (S30), the air flow control system (S40), the inert gas generation system (S50) and the bracket system (S60) through an industrial personal computer control wire harness (6); the air blowing system (S30) is connected with the air heating system (S20) and the inert gas generating system (S50) through gas connecting pipes; air heating system (S20) and inert gas
The body generating system (S50) is connected with the bracket system (S60); the bracket system (S60) is connected with the dust removal system (S70) through an exhaust connecting pipe (11); the measurement and control system (S10) includes: the power line (1), the industrial personal computer (2) and the industrial personal computer control wire harness (6); one end of a power line (1) in the measurement and control system (S10) is connected with a 220V alternating current power supply, and the other end of the power line (1) is connected with an industrial personal computer (2) in the measurement and control system (S10), a high-temperature hot air gun controller (3) in the air heating system (S20) and a variable-frequency fan controller (4) in the air blowing system (S30); the industrial personal computer (2) in the measurement and control system (S10) is connected with the variable frequency fan controller (4) in the air blowing system (S30), the cold air channel throttle valve (14) in the air flow control system (S40), the hot air channel throttle valve (15) in the air flow control system (S40), the high-temperature hot air gun controller (3) in the air heating system (S20), the upstream temperature sensor (8) in the bracket system (S60), the downstream temperature sensor (9) in the bracket system (S60), the upstream and downstream pressure difference sensor (10) in the bracket system (S60) and the nitrogen generator (17) in the inert gas generation system (S50) through the industrial personal computer control wire harness (6); the air heating system (S20) includes: a high-temperature hot air gun controller (3), a high-temperature hot air gun control line (7), a high-temperature hot air gun (16) and a high-temperature hot air gun outlet temperature sensor (18); one end of the high-temperature hot air gun controller (3) is connected with an industrial personal computer (2) in the measurement and control system (S10) through an industrial personal computer control wire harness (6), and the other end of the high-temperature hot air gun controller (3) is connected with a high-temperature hot air gun (16) and a high-temperature hot air gun outlet temperature sensor (18) through a high-temperature hot air gun control wire (7); the blower system (S30) includes: the variable frequency fan control device comprises a variable frequency fan controller (4), a variable frequency fan control line (5), a variable frequency fan (12) and an air flow sensor (13); one end of the variable frequency fan controller (4) is connected with an industrial personal computer (2) in the measurement and control system (S10) through an industrial personal computer control wire harness (6), and the other end of the variable frequency fan controller (4) is connected with a variable frequency fan (12) and an air flow sensor (13) through a variable frequency fan control wire (5); the airflow control system (S40) includes: a cold air passage throttle valve (14) and a hot air passage throttle valve (15); one end of a cold air channel throttle valve (14) is connected with a variable frequency fan (12) of a blowing system (S30), and the other end of the cold air channel throttle valve (14) is connected with a nitrogen generator (17) in an inert gas generation system (S50); one end of a hot air channel throttle valve (15) in the air flow control system (S40) is connected with a variable frequency fan (12) of the air blowing system (S30), and the other end of the hot air channel throttle valve (15) is connected with a high-temperature hot air gun (16) in the air heating system (S20); the inert gas generation system (S50) includes: a nitrogen generator (17); one end of a nitrogen generator (17) is connected with a cold air channel throttle valve (14), and the other end of the nitrogen generator (17) is connected with a cold and hot gas mixer (19) in a bracket system (S60); the rack system (S60) comprises: an upstream temperature sensor (8), a downstream temperature sensor (9), an upstream and downstream pressure difference sensor (10), an exhaust connecting pipe (11), a cold and hot gas mixer (19) and a DPF carrier (20) to be cleaned; the upstream temperature sensor (8), the downstream temperature sensor (9) and the upstream and downstream pressure difference sensor (10) are respectively connected with an industrial personal computer control wire harness (6) in the measurement and control system (S10); one end of a cold and hot gas mixer (19) is connected with a high-temperature hot air gun (16) in an air heating system (S20) and a nitrogen generator (17) in an inert gas generation system (S50), and the other end of the cold and hot gas mixer (19) is connected with a DPF carrier (20) to be cleaned; one end of an exhaust connecting pipe (11) is connected with a DPF carrier (20) to be cleaned, and the other end of the exhaust connecting pipe (11) is connected with a cyclone dust collector (22) in a dust removal system (S70); the dust removal system (S70) includes: a dust collector (21) and a cyclone dust collector (22); one end of the cyclone dust collector (22) is connected with an exhaust connecting pipe (11) in the bracket system (S60), and the other end of the cyclone dust collector (22) is connected with the dust collector (21).
2. A DPF carrier soot and ash cleaning device according to claim 1, characterized in that: the specific cleaning method comprises the following steps:
【1】 Firstly, reading a current fault code about a DPF carrier (20) to be cleaned in a diesel engine controller through fault diagnosis equipment, and dividing a cleaning method of the DPF carrier (20) to be cleaned into a serious blockage cleaning method, a slight blockage cleaning method, a normal regeneration alarm cleaning method and a single ash removal mode cleaning method according to the fault code;
【2】 In the cleaning process of the four cleaning methods, the industrial personal computer (2) monitors and performs closed-loop control on the cleaning process by controlling the working processes of the high-temperature hot air gun controller (3), the variable-frequency fan controller (4), the cold air channel throttle valve (14) and the hot air channel throttle valve (15) according to feedback of an upstream temperature sensor (8), a downstream temperature sensor (9) and an upstream and downstream pressure difference sensor (10);
【3】 The industrial personal computer (2) adopts a programmable and modularized control program, and the main control program comprises the following modules:
1) Normal temperature cleaning module: setting 200-800 kg/h of required air quantity and 5-30 minutes of required air quantity duration on the industrial personal computer (2), and then transmitting the required air quantity to the variable frequency fan controller (4) by the industrial personal computer (2) through the industrial personal computer control wire harness (6); the variable frequency fan controller (4) is connected with the variable frequency fan (12) and the air flow sensor (13) through the variable frequency fan control line (5), the air flow sensor (13) feeds the real-time air quantity of the variable frequency fan (12) back to the variable frequency fan controller (4) through the variable frequency fan control line (5), the variable frequency fan controller (4) adjusts the working process of the variable frequency fan (12) in a closed loop mode through the variable frequency fan control line (5) according to the real-time air quantity fed back by the air flow sensor (13), and finally, the control process that the real-time air quantity of the variable frequency fan (12) is consistent with the required air quantity is realized; after the cleaning process is started, the cold air channel throttle valve (14) is in a normally closed state, the hot air channel throttle valve (15) is in a normally opened state, the hot air gun (16) does not heat the normal-temperature air flowing through, the normal-temperature air flow carries out reverse purging on the DPF carrier (20) to be cleaned, and then the particles and ash which are purged are trapped in the dust collector (21) by the cyclone dust collector (22);
2) And a medium-low temperature cleaning module: setting 200-800 kg/h of required air quantity, 200-250 ℃ of required air quantity temperature and 5-30 minutes of required air quantity duration on an industrial personal computer (2), then sending the required air quantity and the required air quantity duration to a variable frequency fan controller (4) through an industrial personal computer control wiring harness (6), measuring the actual air quantity of a variable frequency fan (12) through an air quantity sensor (13) by the variable frequency fan controller (4), and controlling the working process of the variable frequency fan (12) in a closed loop mode to enable the actual air quantity of the variable frequency fan (12) to reach the required air quantity; the industrial personal computer (2) sends the required air volume temperature to the high-temperature hot air gun controller (3) through the industrial personal computer control wire harness (6), and the high-temperature hot air gun controller (3) measures the actual air outlet temperature of the high-temperature hot air gun (16) according to the high-temperature hot air gun outlet temperature sensor (18), and controls the working process of the high-temperature hot air gun (16) in a closed loop manner so that the actual air outlet temperature of the high-temperature hot air gun (16) reaches the required air volume temperature; after the cleaning process is started, a cold air channel throttle valve (14) is in a normally closed state, a hot air channel throttle valve (15) is in a normally opened state, a hot air gun (16) heats normal-temperature air flowing through the cold air channel throttle valve, the heated air flow reversely sweeps and heats a DPF carrier (20) to be cleaned, and then a cyclone dust collector (22) traps the swept particles and ash in a dust collector (21);
3) Medium-high temperature cleaning module: setting 200-800 kg/h of required air quantity, 400-450 ℃ of required air quantity temperature and 5-30 minutes of required air quantity duration on an industrial personal computer (2), and then sending the required air quantity and the required air quantity duration to a variable frequency fan controller (4) by the industrial personal computer (2) through an industrial personal computer control wire harness (6), wherein an air flow sensor (13) of the variable frequency fan controller (4) measures the actual air quantity of the variable frequency fan (12) to control the working process of the variable frequency fan (12) in a closed loop manner, so that the actual air quantity of the variable frequency fan (12) reaches the required air quantity; the industrial personal computer (2) sends the required air volume temperature to the high-temperature hot air gun controller (3) through the industrial personal computer control wire harness (6), and the high-temperature hot air gun controller (3) performs closed-loop control on the working process of the high-temperature hot air gun (16) according to the actual air outlet temperature of the high-temperature hot air gun (16) measured by the high-temperature hot air gun outlet temperature sensor (18) so that the actual air outlet temperature of the high-temperature hot air gun (16) reaches the required air volume temperature; after the cleaning process is started, a cold air channel throttle valve (14) is in a normally closed state, a hot air channel throttle valve (15) is in a normally opened state, a hot air gun (16) heats normal-temperature air flowing through the cold air channel throttle valve, the heated air flow reversely sweeps and heats a DPF carrier (20) to be cleaned, and then a cyclone dust collector (22) traps the swept particles and ash in a dust collector (21);
4) And a high-temperature cleaning module: setting 200-800 kg/h of required air quantity, 600-650 ℃ of required air quantity temperature and 5-30 minutes of required air quantity duration on an industrial personal computer (2), and then sending the required air quantity and the required air quantity duration to a variable frequency fan controller (4) by the industrial personal computer (2) through an industrial personal computer control wire harness (6), wherein an air flow sensor (13) of the variable frequency fan controller (4) measures the actual air quantity of the variable frequency fan (12) to control the working process of the variable frequency fan (12) in a closed loop manner, so that the actual air quantity of the variable frequency fan (12) reaches the required air quantity; the industrial personal computer (2) sends the required air volume temperature to the high-temperature hot air gun controller (3) through the industrial personal computer control wire harness (6), and the high-temperature hot air gun controller (3) performs closed-loop control on the working process of the high-temperature hot air gun (16) according to the actual air outlet temperature of the high-temperature hot air gun (16) measured by the high-temperature hot air gun outlet temperature sensor (18) so that the actual air outlet temperature of the high-temperature hot air gun (16) reaches the required air volume temperature; after the cleaning process is started, a cold air channel throttle valve (14) is in a normally closed state, a hot air channel throttle valve (15) is in a normally opened state, a hot air gun (16) heats normal-temperature air flowing through the cold air channel throttle valve, the heated air flow carries out reverse purging, heating and internal soot burning processes on a DPF carrier (20) to be cleaned, and then a cyclone dust collector (22) captures purged particles and ash in a dust collector (21);
【4】 If the DPF carrier (20) to be cleaned is seriously blocked, firstly sequentially calling a normal temperature cleaning module, a medium and low temperature cleaning module and a medium and high temperature cleaning module to clean soot and unburned hydrocarbon of the DPF carrier (20), and reducing the carbon loading of the DPF carrier (20) to be cleaned to be within a safe regeneration range; then, a high-temperature cleaning module is called to conduct active regeneration, and residual soot in the DPF carrier (20) to be cleaned is burnt; finally, sequentially calling a medium-high temperature cleaning module and a medium-low temperature cleaning module to clean ash content of the DPF carrier (20) to be cleaned;
【5】 If the DPF carrier (20) to be cleaned is slightly blocked, firstly sequentially calling a normal temperature cleaning module and a medium-low temperature cleaning module to clean the carbon smoke and unburned hydrocarbon of the DPF carrier (20) to be cleaned, and reducing the carbon load of the DPF carrier (20) to be cleaned to be within a safe regeneration range; then, a high-temperature cleaning module is called to conduct active regeneration, and residual soot in the DPF carrier (20) to be cleaned is burnt; finally, sequentially calling a medium-high temperature cleaning module and a medium-low temperature cleaning module to clean ash content of the normal-temperature cleaning module;
【6】 If the DPF carrier (20) to be cleaned is normal regeneration alarm, directly calling a high-temperature cleaning module to perform active regeneration, and burning residual soot in the DPF carrier (20) to be cleaned; then sequentially calling a medium-high temperature cleaning module and a medium-low temperature cleaning module to clean ash content of the DPF carrier (20) to be cleaned;
【7】 And if the DPF carrier (20) to be cleaned is ash cleaning and alarming, sequentially calling a medium-high temperature cleaning module and a medium-low temperature cleaning module to clean ash from the DPF carrier (20) to be cleaned.
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| CN110735690A (en) * | 2019-10-24 | 2020-01-31 | 凯龙高科技股份有限公司 | high-temperature maintenance device for electrically heated particle catcher |
| CN112943415B (en) * | 2021-02-05 | 2023-05-12 | 北京航天爱锐科技有限责任公司 | Control method and control device of exhaust gas treatment device and vehicle |
| CN113374557B (en) * | 2021-06-11 | 2022-07-08 | 山东大学 | Intelligent cleaning device of particle catcher |
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| CN110206615A (en) | 2019-09-06 |
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