CN110792496A - Imaging detection device of diesel particle catcher - Google Patents
Imaging detection device of diesel particle catcher Download PDFInfo
- Publication number
- CN110792496A CN110792496A CN201910973260.XA CN201910973260A CN110792496A CN 110792496 A CN110792496 A CN 110792496A CN 201910973260 A CN201910973260 A CN 201910973260A CN 110792496 A CN110792496 A CN 110792496A
- Authority
- CN
- China
- Prior art keywords
- section
- dpf
- shell
- driven
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003384 imaging method Methods 0.000 title claims abstract description 56
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 239000002245 particle Substances 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 18
- 239000003546 flue gas Substances 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 18
- 239000000779 smoke Substances 0.000 claims description 12
- 239000000919 ceramic Substances 0.000 claims description 8
- 238000009792 diffusion process Methods 0.000 claims description 7
- 238000002203 pretreatment Methods 0.000 claims description 7
- 239000010425 asbestos Substances 0.000 claims description 4
- 229910052895 riebeckite Inorganic materials 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000007781 pre-processing Methods 0.000 claims 2
- 239000000523 sample Substances 0.000 claims 2
- 230000008929 regeneration Effects 0.000 abstract description 29
- 238000011069 regeneration method Methods 0.000 abstract description 29
- 238000000034 method Methods 0.000 abstract description 16
- 238000009825 accumulation Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract description 4
- 239000013618 particulate matter Substances 0.000 description 7
- 238000003325 tomography Methods 0.000 description 4
- 238000012805 post-processing Methods 0.000 description 3
- 239000004071 soot Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000001683 neutron diffraction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
-
- 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
- F01N13/14—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 having thermal insulation
-
- 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
- F01N3/0214—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 with filters comprising movable parts, e.g. rotating filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1606—Particle filter loading or soot amount
-
- 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)
- Health & Medical Sciences (AREA)
- Theoretical Computer Science (AREA)
- Pulmonology (AREA)
- Radiology & Medical Imaging (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
The invention discloses an imaging detection device of a diesel particle catcher, which comprises: a neutron generator, a DPF experimental device and an imaging detector; the neutron generator is used for emitting neutron beams, and the imaging detector is arranged in the emission direction of the neutron beams of the neutron generator and used for receiving the neutron beams; the DPF experimental device is disposed between the neutron generator and the imaging detector, and the neutron beam passes through the DPF experimental device to reach the imaging detector. According to the invention, the particle accumulation process and the regeneration process of the DPF filter are subjected to imaging detection and dynamic observation, so that the regeneration effect of the particles in the DPF filter is detected, the study on the filtering performance and the regeneration quality of the DPF filter is facilitated, support is provided for the quality detection and design work of the DPF filter, and the understanding and the study on the DPF regeneration process are deepened for people.
Description
Technical Field
The invention relates to the field of imaging detection, in particular to an imaging detection device of a diesel particle catcher, and more particularly relates to a neutron imaging detection device for observing the regeneration effect of the diesel particle catcher.
Background
A Particulate trap dpf (diesel Particulate filter) is a ceramic filter installed in an exhaust system of a diesel exhaust port, and is installed at the rear of an exhaust pipe and at the middle of a muffler to have a good trapping effect on Particulate emissions.
In the running process of the engine, when the tail gas of the diesel vehicle passes through the DPF, particles carried in the tail gas can be adsorbed and precipitated by a filter body in the DPF, so that the tail gas is purified, and the process is called as the trapping of the DPF; as the particulate matter filters and precipitates, the filter pores become increasingly plugged, causing the exhaust backpressure of the diesel vehicle to rise, which can affect the dynamics and economics of the diesel vehicle, and it is therefore necessary to combust or otherwise treat the soot accumulated in the DPF to remove it from the support, a process known as regeneration of the DPF.
At present, the understanding of the accumulation process and the regeneration process of the particulates in the DPF is not perfect, and in order to improve the performance of the DPF and improve the exhaust emission quality, it is necessary to study the mechanism of the accumulation process and the regeneration process of the DPF particulates.
By utilizing the characteristics of deep penetration of neutrons, sensitivity to hydrogen elements and the like, the method can perform in-situ test nondestructive imaging on the DPF, is beneficial to meeting the measurement requirements of different samples under different technical requirements, further expands the neutron technology research application range and improves DPF design. At present, no related detection device product exists in China.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a neutron imaging detection device for observing the regeneration effect of a diesel particle catcher, wherein the DPF experimental device can accumulate and regenerate particulate matters, and meanwhile, neutron beams emitted by a neutron generator pass through the DPF experimental device to reach an imaging detector, so that the imaging or tomography imaging of the internal structure of the DPF filter is completed, and the dynamic observation and the detection of the accumulation and regeneration processes in the DPF filter are realized by detecting the change degree of the particulate matters.
The invention is realized by adopting the following technical scheme:
an imaging detection device of a diesel particle trap, comprising: a neutron generator and an imaging detector; the neutron generator is used for emitting neutron beams, and the imaging detector is arranged in the emission direction of the neutron beams of the neutron generator and used for receiving the neutron beams; a DPF experimental device disposed between the neutron generator and the imaging detector, the neutron beam passing through the DPF experimental device to reach the imaging detector; the DPF experimental apparatus includes: the pretreatment section is communicated with an external diesel engine tail gas discharge port and comprises a pretreatment section shell, a heating wire and a first pressure sensor; the heating wire is fixedly arranged in the pretreatment section shell, and the first pressure sensor is fixedly arranged on the pretreatment section shell; the driven section is communicated with the pretreatment section and comprises a driven section shell, a driven section bearing and a driven section bearing seat; the driven section shell is arranged in the driven section bearing block through the driven section bearing; a DPF section in communication with the driven section, the DPF section including a DPF housing and a DPF filter; the DPF filter is fixedly arranged in the DPF shell; the DPF shell is fixedly connected with the driven section shell; the driving section is communicated with the DPF section and comprises a driving section shell, a rotating mechanism, a driving section bearing and a driving section bearing seat; the rotating mechanism is used for driving the driving section shell to rotate, and the driving section shell is arranged in the driving section bearing block through the driving section bearing; the driving section shell is fixedly connected with the DPF shell so as to enable the driving section shell, the DPF section and the driven section shell to rotate in a linkage manner; and the aftertreatment section is communicated with the active section and the other end of the aftertreatment section is communicated with an external tail gas treatment system, the aftertreatment section comprises an aftertreatment section shell, a second pressure sensor and a smoke particle sensor, and the second pressure sensor and the smoke particle sensor are arranged on the aftertreatment section shell.
Further, the imaging detection device of the diesel particle catcher further comprises: a booster fan; and two ends of the booster fan are respectively connected with the pretreatment section and the tail gas discharge port of the diesel engine.
Further, the imaging detection device of the diesel particle catcher further comprises: the sealing structure comprises two semi-sealing rings and an asbestos sealing belt arranged in the semi-sealing rings; the number of the sealing structures is 2, and the sealing structures are respectively arranged at the joint of the pre-treatment section and the driven section and the joint of the post-treatment section and the driving section.
Further, the pretreatment section also comprises a smoke diffusion net; the smoke diffusion net is covered outside the heating wire.
Further, the pretreatment section also comprises a first temperature sensor; the first temperature sensor is arranged at one end of the pretreatment section, which is opposite to the tail gas discharge port of the diesel engine.
Further, the pretreatment section also comprises a second temperature sensor; the second temperature sensor is arranged at one end of the pretreatment section relative to the driven section.
Further, the DPF body is made of an aluminum alloy material.
Further, the rotating mechanism comprises a stepping motor, a driving gear and a driven gear; the stepping motor is fixedly arranged on the driving section bearing seat, the stepping motor, the driving gear and the driven gear are in transmission connection, and the driven gear is fixedly connected with the driving section shell.
Further, the imaging detector is a fluorescence detector or a multi-channel detector.
Further, the driving section and the driven section each comprise a thermally insulating ceramic liner; the heat insulation ceramic bushings are respectively arranged between the driving section shell and the driving section bearing and between the driven section shell and the driven section bearing.
Compared with the prior art, the invention has the beneficial effects that: the diesel tail gas is introduced into the DPF filter to realize a particle accumulation process, the heating wire burns soot to realize a particle regeneration process, and the active section drives the DPF filter to rotate; meanwhile, neutron beams emitted by the neutron generator penetrate through the DPF filter and reach the imaging detector, and neutron tomography three-dimensional imaging of particulate matters inside the DPF filter is achieved. According to the invention, the particle accumulation process and the regeneration process of the DPF filter are subjected to imaging detection and dynamic observation, so that the regeneration effect of the particles in the DPF filter is detected, the study on the filtering performance and the regeneration quality of the DPF filter is facilitated, support is provided for the quality detection and design work of the DPF filter, and the understanding and the study on the DPF regeneration process are deepened for people.
Drawings
FIG. 1 is a top view of the present invention as a whole;
FIG. 2 is a schematic perspective view of a DPF experimental apparatus;
FIG. 3 is a cross-sectional view of the pretreatment section;
FIG. 4 is a cross-sectional view of a DPF section;
FIG. 5 is an exploded view of the active segment;
fig. 6 is a perspective view of the post-processing section.
In the figure: 10. a neutron generator; 20. DPF experimental setup; 21. a booster fan; 22. a pretreatment section; 221. a pretreatment section shell; 222. heating wires; 223. a flue gas diffusion net; 224. a first pressure sensor; 225. a first temperature sensor; 226. a second temperature sensor; 23. a driven section; 24. a DPF section; 241. a DPF housing; 242. a DPF filter; 25. an active section; 251. a drive section housing; 252. a drive section bearing; 253. a drive section bearing block; 254. a stepping motor; 255. a driving gear; 256. a driven gear; 257. a thermally insulating ceramic liner; 26. a post-treatment section; 261. a post-treatment section housing; 262. a second pressure sensor; 263. a flue gas particulate sensor; 27. a sealing structure; 30. an imaging detector.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
The invention discloses an imaging detection device of a diesel particle catcher. More particularly, the device is an in-situ experimental device for observing the particle accumulation and regeneration process of the diesel particle catcher by using neutron diffraction spectrometer imaging.
Referring to fig. 1, the present invention includes a neutron generator 10, a DPF experimental apparatus 20, and an imaging detector 30. Wherein the neutron generator 10 emits a neutron beam through a neutron guide, the imaging detector 30 is disposed in a neutron beam emitting direction of the neutron generator 10, and the DPF experimental apparatus 20 is disposed between the neutron generator 10 and the imaging detector 30. Since the neutron beam has a deep penetration property and is sensitive to hydrogen elements, the neutron beam emitted from the neutron generator 10 can pass through the DPF experimental apparatus 20 and then be detected by the imaging detector 30.
The imaging detector 30 may be a fluorescence detector or a multi-channel detector, and the neutron generator 10 and the imaging detector 30 are prior art products and are commercially available.
Referring to fig. 2, the DPF experimental apparatus 20 includes: a booster fan 21, a pre-treatment section 22, a driven section 23, a DPF section 24, a driving section 25, and a post-treatment section 26.
One end of the booster fan 21 is connected with an external diesel engine tail gas discharge port, and the other end is connected with the pretreatment section 22, so that the tail gas is pressurized and sent into the DPF filter 242, the experimental time is shortened, and particulate matters in the DPF are gathered in a short time to reach the regeneration standard.
The pretreatment section 22 is communicated with a diesel exhaust discharge port through a booster fan 21, and referring to fig. 3, the pretreatment section 22 includes: the pretreatment section comprises a pretreatment section shell 221, a heating wire 222, a flue gas diffusion net 223, a first pressure sensor 224, a first temperature sensor 225 and a second temperature sensor 226. The pretreatment section shell 221 contains and transmits flue gas; the first pressure sensor 224 is fixedly arranged on the pretreatment section shell 221 and used for detecting the pressure value of the flue gas at the inlet of the DPF; the heating wire 222 is fixedly arranged in the pre-treatment section shell 221 and is used for heating the flue gas to hundreds of ℃ to burn the particulate matters accumulated in the DPF, so that the particulate matters are removed, and the regeneration effect of the DPF is achieved; the smoke diffusion net 223 is enclosed outside the heating wire 222 and used for diffusing the burned smoke; a first temperature sensor 225 is provided at an end of the pre-treatment section 22 opposite to the exhaust port of the diesel engine for measuring the temperature of the flue gas before heating, and a second temperature sensor 226 is provided at an end of the pre-treatment section 22 opposite to the driven section 23 for measuring the temperature of the flue gas after heating, so that the heating time or heating power of the heating wires 222 can be adjusted as appropriate.
Other electric heating or oil-gas heating devices can be used as the heating wire 222.
The both ends of driven section 23 communicate with preceding section 22 and DPF section 24 respectively, and driven section 23 includes: driven section casing, driven section bearing and driven section bearing frame. The driven section shell is arranged on the driven section bearing block through a driven section bearing. The driven section 23 is similar in construction to the drive section 25, except for the absence of the stepper motor 254 and gear train, and reference is made to the drive section 25, the construction of the drive section 25 being described in detail below. The driven section 23 functions to provide support for rotation of the DPF filter 242.
Both ends of the DPF section 24 communicate with the driven section 23 and the driving section 25, respectively, and referring to fig. 4, the DPF end includes a DPF casing 241 and a DPF filter 242. The DPF filter 242 is specifically a ceramic filter, and is fixedly disposed in the DPF casing 241; the DPF is made of aluminum alloy materials, so that the loss of neutron passing can be reduced to the minimum, and the imaging quality is improved; the DPF casing 241 is fixedly connected to the driven section 23. The accumulation and regeneration of particulate matter is accomplished in the DPF section 24, and DPF filters 242 of different specifications can be placed in the DPF housing 241, and then the smoke is passed through to test the smoke filtering performance and regeneration quality.
The active section 25 is used for driving the DPF section 24 to rotate, so that the neutron beam can complete tomography three-dimensional imaging. Both ends of the active section 25 are respectively communicated with the DPF section 24 and the aftertreatment section 26, and referring to fig. 5, the active section 25 includes: a driving section housing 251, a rotating mechanism, a driving section bearing 252 and a driving section bearing seat 253; the driving section shell 251 is arranged on a driving section bearing seat 253 through a driving section bearing 252, and the driving section shell 251 and the DPF shell 241 are fixedly connected; the rotating mechanism specifically comprises a stepping motor 254, a driving gear 255 and a driven gear 256 which are in transmission connection, the stepping motor 254 is fixedly arranged on a driving section bearing seat 253, the driven gear 256 is fixedly connected with the driving section shell 251, and the stepping motor 254 drives the driving gear 255 and drives the driven gear 256 to rotate, so that the driving section shell 251, the DPF section 24 and the driven section 23 are driven to rotate in a linkage manner. The stepping motor 254 is used for accurately controlling the rotation angle of the DPF filter and realizing high-precision tomography imaging.
Between the driving section housing 251 and the driving section bearing 252, and between the driven section housing and the driven section bearing, there is a heat insulation ceramic bushing 257 to prevent heat from being conducted to the bearings to cause the bearings to be locked.
One end of the post-treatment section 26 is communicated with the active section 25, and the other end is communicated with a tail gas treatment system of an external laboratory, and is used for guiding out the flue gas after the experiment for subsequent treatment; referring to fig. 6, the post-processing section 26 includes: an aftertreatment section housing 261, a second pressure sensor 262, and a flue gas particulate sensor 263, the second pressure sensor 262 and the flue gas particulate sensor 263 each being disposed on the aftertreatment section housing 261. The second pressure sensor 262 is used for measuring the back side pressure of the DPF filter 242, and comparing with the first pressure sensor 224 of the pretreatment section 22 to obtain a pressure difference to judge the current blocking degree of the DPF particulate matter, and further determine whether the DPF particulate matter reaches the DPF regeneration standard, if the DPF particulate matter reaches the regeneration standard, the heating wire 222 can be started to perform the flue gas combustion regeneration. The flue gas particulate sensor 263 is used to determine the particulate size of the flue gas, ensuring that particulate pollutants in the flue gas meet the requirements.
The joint of the pretreatment section 22 and the driven section 23 is also provided with a sealing structure 27, the sealing structure 27 comprises two semi-sealing rings and an asbestos sealing tape arranged in the plate sealing ring, when in sealing, the asbestos sealing tape is wound at the joint of the two flanges, and then the two semi-sealing rings are pressed tightly to play a role in sealing the smoke. The DPF rotates at a slow speed and only needs to rotate 360 degrees, so the sealing can meet the requirement.
The number of the seal structures 27 is 2, and accordingly, one seal structure 27 is also provided at the junction of the post-processing section 26 and the driven section 23.
The working process of the invention is as follows: after the tail gas of the tail gas discharge port of the diesel engine is introduced into the DPF experimental apparatus 20, particulate matters are accumulated in the DPF filter 242, whether the flue gas reaches the regeneration standard is judged by the pressure difference between the first pressure sensor 224 and the second pressure sensor 262, and after the flue gas reaches the regeneration standard, the heating wire 222 burns soot to regenerate the DPF filter 242; the stepping motor 254 drives the DPF filter 242 to make a slow rotation motion by driving the driving gear 255 and the driven gear 256; meanwhile, the neutron generator 10 emits a neutron beam, which penetrates the DPF filter 242 and reaches the imaging detector 30, and neutron tomographic three-dimensional imaging of the particulate matter inside the DPF filter 242 is realized.
Through the detailed explanation of the above embodiments, it can be understood that the technical effects of the present invention are as follows: through carrying out formation of image detection and dynamic observation to DPF filter's granule accumulation process and regeneration process to detect out the regeneration effect of particulate matter in DPF filter inside, be favorable to helping to study DPF filter's filtration performance and regeneration quality, provide support for DPF filter's quality detection and design work, help people to deepen understanding and research to DPF regeneration process simultaneously.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. An imaging detection device for a diesel particulate trap, comprising:
a neutron generator and an imaging detector; the neutron generator is used for emitting neutron beams, and the imaging detector is arranged in the emission direction of the neutron beams of the neutron generator and used for receiving the neutron beams;
a DPF experimental device disposed between the neutron generator and the imaging detector, the neutron beam passing through the DPF experimental device to reach the imaging detector;
the DPF experimental apparatus includes:
the pretreatment section is communicated with an external diesel engine tail gas discharge port and comprises a pretreatment section shell, a heating wire and a first pressure sensor; the heating wire is fixedly arranged in the pretreatment section shell, and the first pressure sensor is fixedly arranged on the pretreatment section shell;
the driven section is communicated with the pretreatment section and comprises a driven section shell, a driven section bearing and a driven section bearing seat; the driven section shell is arranged in the driven section bearing block through the driven section bearing;
a DPF section in communication with the driven section, the DPF section including a DPF housing and a DPF filter; the DPF filter is fixedly arranged in the DPF shell; the DPF shell is fixedly connected with the driven section shell;
the driving section is communicated with the DPF section and comprises a driving section shell, a rotating mechanism, a driving section bearing and a driving section bearing seat; the rotating mechanism is used for driving the driving section shell to rotate, and the driving section shell is arranged in the driving section bearing block through the driving section bearing; the driving section shell is fixedly connected with the DPF shell so as to enable the driving section shell, the DPF section and the driven section shell to rotate in a linkage manner;
and the aftertreatment section is communicated with the active section and the other end of the aftertreatment section is communicated with an external tail gas treatment system, the aftertreatment section comprises an aftertreatment section shell, a second pressure sensor and a smoke particle sensor, and the second pressure sensor and the smoke particle sensor are arranged on the aftertreatment section shell.
2. The imaging detection device of a diesel particle trap as set forth in claim 1, further comprising: a booster fan; and two ends of the booster fan are respectively connected with the pretreatment section and the tail gas discharge port of the diesel engine.
3. The imaging detection device of a diesel particle trap as set forth in claim 1, further comprising: the sealing structure comprises two semi-sealing rings and an asbestos sealing belt arranged in the semi-sealing rings; the number of the sealing structures is 2, and the sealing structures are respectively arranged at the joint of the pre-treatment section and the driven section and the joint of the post-treatment section and the driving section.
4. The imaging detection apparatus of the diesel particulate trap of claim 1, wherein the pre-treatment section further comprises a flue gas diffusion mesh; the smoke diffusion net is covered outside the heating wire.
5. The imaging detection apparatus of a diesel particulate trap as set forth in claim 1, wherein the pre-processing section further comprises a first temperature sensor; the first temperature sensor is arranged at one end of the pretreatment section, which is opposite to the tail gas discharge port of the diesel engine.
6. The imaging detection apparatus of the diesel particulate trap of claim 5, wherein the pre-processing section further comprises a second temperature sensor; the second temperature sensor is arranged at one end of the pretreatment section relative to the driven section.
7. The imaging detection device of the diesel particulate trap as claimed in claim 1, wherein the DPF casing is made of an aluminum alloy material.
8. The imaging detection apparatus of the diesel particulate trap of claim 1, wherein the rotation mechanism comprises a stepping motor, a driving gear and a driven gear; the stepping motor is fixedly arranged on the driving section bearing seat, the stepping motor, the driving gear and the driven gear are in transmission connection, and the driven gear is fixedly connected with the driving section shell.
9. The imaging detection apparatus of the diesel particle trap as set forth in claim 1, wherein the imaging detector is a fluorescence probe or a multi-channel probe.
10. The imaging detector of a diesel particulate trap of claim 1, wherein said driving section and said driven section each comprise a thermally insulating ceramic liner; the heat insulation ceramic bushings are respectively arranged between the driving section shell and the driving section bearing and between the driven section shell and the driven section bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910973260.XA CN110792496A (en) | 2019-10-14 | 2019-10-14 | Imaging detection device of diesel particle catcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910973260.XA CN110792496A (en) | 2019-10-14 | 2019-10-14 | Imaging detection device of diesel particle catcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110792496A true CN110792496A (en) | 2020-02-14 |
Family
ID=69439046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910973260.XA Pending CN110792496A (en) | 2019-10-14 | 2019-10-14 | Imaging detection device of diesel particle catcher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110792496A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0442318A2 (en) * | 1990-02-16 | 1991-08-21 | Firma J. Eberspächer | Particle filter regenerable by combusting for exhaust gases of internal combustion engines |
| CN103206287A (en) * | 2011-11-29 | 2013-07-17 | 迪尔公司 | Diesel Particulate Filters Having A Washcoat That Improves Filter Performance |
| CN103573350A (en) * | 2012-07-20 | 2014-02-12 | 曼卡车和巴士股份公司 | Mixing device for the aftertreatment of exhaust gases |
| CN110050111A (en) * | 2017-01-12 | 2019-07-23 | 大众汽车有限公司 | Method for making particulate filter regeneration |
| CN211448807U (en) * | 2019-10-14 | 2020-09-08 | 东莞材料基因高等理工研究院 | Imaging detection device of diesel particle catcher |
-
2019
- 2019-10-14 CN CN201910973260.XA patent/CN110792496A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0442318A2 (en) * | 1990-02-16 | 1991-08-21 | Firma J. Eberspächer | Particle filter regenerable by combusting for exhaust gases of internal combustion engines |
| CN103206287A (en) * | 2011-11-29 | 2013-07-17 | 迪尔公司 | Diesel Particulate Filters Having A Washcoat That Improves Filter Performance |
| CN103573350A (en) * | 2012-07-20 | 2014-02-12 | 曼卡车和巴士股份公司 | Mixing device for the aftertreatment of exhaust gases |
| CN110050111A (en) * | 2017-01-12 | 2019-07-23 | 大众汽车有限公司 | Method for making particulate filter regeneration |
| CN211448807U (en) * | 2019-10-14 | 2020-09-08 | 东莞材料基因高等理工研究院 | Imaging detection device of diesel particle catcher |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9739761B2 (en) | Particulate matter filter diagnostic techniques based on exhaust gas analysis | |
| JP4500359B2 (en) | Method for diagnosing presence of exhaust gas after-treatment device and use of on-board diagnostic technology | |
| US20110232362A1 (en) | Detection of exhaust filter effectiveness | |
| CN105402007A (en) | Box type post processing assembly for diesel vehicle | |
| EP2813678B1 (en) | An exhaust gas sampling device | |
| CN113090370B (en) | Test method for confirming DPF balance point temperature of off-road diesel engine | |
| CN211448807U (en) | Imaging detection device of diesel particle catcher | |
| Quan-shun et al. | Application of diesel particulate filter on in-use on-road vehicles | |
| Mayer et al. | Particle size distribution downstream traps of different design | |
| Rubino et al. | Fundamental study of GPF performance on soot and ash accumulation over artemis urban and motorway cycles-comparison of engine bench results with GPF durability study on road | |
| FI93138C (en) | Catalytic exhaust gas purifying diesel engine utilizing centrifugal force for particulate separation and catalytic process for exhaust gas purification | |
| ES2587131T3 (en) | Catalytic efficacy test of an exhaust component | |
| CN110792496A (en) | Imaging detection device of diesel particle catcher | |
| Szymlet et al. | Comparative analysis of passenger car and non-road machinery specific emission in real operating conditions | |
| Parthiban et al. | Emission control in multi-cylinder spark ignition engines using metal-oxide coated catalytic converter | |
| CN109386360A (en) | The method for determining the oxidation susceptibility of oxidation catalyzer device | |
| CN106812571B (en) | Integrated sensor catalyst | |
| CN210068267U (en) | DPF soot steady-state quick loading device | |
| JP5526973B2 (en) | Filter evaluation method and evaluation apparatus | |
| Araji | Effects of Porosity, Wall Thickness and Length on the Filtration Efficiency of Gasoline Particulate Filters | |
| Nakamura et al. | Challenges Related to the Measurement of Particle Emissions of Gasoline Direct Injection Engines Under Cold-Start and Low-Temperature Conditions | |
| Sokolnicka-Popis et al. | The impact of particulate filter substrate type on the gaseous exhaust components emission | |
| Degner et al. | Low-cost sensor for online detection of harmful diesel combustion gases in UV-VIS region | |
| JP7193965B2 (en) | Exhaust gas purification device | |
| Yanagisawa et al. | VOCs and particle emission from a DPF equipped diesel Engine during Regneration Measured by on-line PTR Mass Spectrometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |