CN1584301A - Exhaust gas purifying apparatus - Google Patents
Exhaust gas purifying apparatus Download PDFInfo
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- CN1584301A CN1584301A CN200410057790.3A CN200410057790A CN1584301A CN 1584301 A CN1584301 A CN 1584301A CN 200410057790 A CN200410057790 A CN 200410057790A CN 1584301 A CN1584301 A CN 1584301A
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- 238000000746 purification Methods 0.000 claims description 49
- 210000003850 cellular structure Anatomy 0.000 claims description 41
- 210000004027 cell Anatomy 0.000 claims description 15
- 230000005684 electric field Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 10
- 239000007789 gas Substances 0.000 description 16
- 230000003647 oxidation Effects 0.000 description 14
- 238000007254 oxidation reaction Methods 0.000 description 14
- 230000014509 gene expression Effects 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 229910052878 cordierite Inorganic materials 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 230000011664 signaling Effects 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 229920002972 Acrylic fiber Polymers 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 206010013786 Dry skin Diseases 0.000 description 1
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- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- NUHSROFQTUXZQQ-UHFFFAOYSA-N isopentenyl diphosphate Chemical compound CC(=C)CCO[P@](O)(=O)OP(O)(O)=O NUHSROFQTUXZQQ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
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
- 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
- F01N3/0275—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 using electric discharge 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/28—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a plasma reactor
-
- 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
Abstract
The present invention relates to an exhaust gas purifying apparatus comprising; a plasma-assist PM purifying reactor; a detecting device for detecting an amount of PM accumulated in the PM purifying reactor; a power supply for the PM purifying reactor; and a controlling device for controlling the power supply on the basis of signals from the detecting device. The controlling device controls the power supply to start supplying the electric power to the PM purifying reactor, or to increase the amount of electric power which is supplied to the PM purifying reactor, when the amount of accumulated PM detected by the detecting device exceeds a predetermined amount.
Description
Technical field
The invention relates to the cleaning equipment of I. C. engine exhaust, particularly about the cleaning equipment of diesel emission PM (particulate matter, particulate matter).
Background technique
Diesel engine is generally used for motor vehicle, particularly truck conspicuity marking.And diesel engine must satisfy oxynitrides (NO at present
x), the low emission of carbon monoxide (CO) and hydrocarbon (HC) and PM.So not only needing also needs to develop the technology of PM in the purifying exhaust gas by improving the generation that motor itself or optimized combustion state reduce PM.
Use diesel particulate filter (DPF) might capture the PM in the exhaust.But, can be stopped up by the PM that is captured along with increasing DPF service time, thereby the pressure reduction by DPF is increased, cause engine load to increase.
In the prior art, use heater etc. that the PM that is captured among the DPF is burnt usually.
Recently proposed to utilize the technology of the greater efficiency that the plasma energy burns the PM that is captured among the DPF.For example, uncensored Japanese patent publication (JPP) No.2002-27633 proposes, and DPF and plasma generator is integrated, to produce NO
2Promote the oxidation of the PM that captures with active oxygen.The document also proposes when DPF low temperature, produces the oxidation that plasma promotes PM.
JPP No.2002-129949 proposes catalyzer and plasma generator combination are purified HC, CO and NO
x, and provide necessary minimum amount of power to plasma generator according to engine speed and catalyst temperature etc.
According to these used isoionic technology in the past, be might be at ato unit and dpf temperature when low, effectively oxidation and remove capture PM's.Even if but when dpf temperature is higher, also might make a large amount of PM of accumulation among the DPF because of the variation of the combustion regime of motor.
When a large amount of PM piled up in DPF, the PM that is piled up produced plasma and becomes unstable, and has reduced the oxidability of PM, causes more PM to pile up in DPF then, forms a vicious circle.
If a large amount of PM burns simultaneously and is eliminated, can produce a large amount of heats.These heats can shorten the life-span of DPF, and might damage DPF.
As described in JPP ' 949, not only according to dpf temperature also according to engine speed etc., can partly address this problem by controlling isoionic generation.But the change of engine combustion state is normally uncertain.So in some cases, controlling isoionic generation according to engine speed, is not enough for fully removing PM.
Summary of the invention
Exhaust gas purifying device of the present invention comprises: an auxiliary PM purification reactor of plasma (also claiming letter to be " PM purification reactor "); A detector that detects PM accumulating amount in the PM purification reactor; Control gear based on detector signal control power supply.When the detected PM accumulating amount of detector surpassed prearranging quatity, control gear control power supply began to the power supply of PM purification reactor, perhaps to its electric power of increasing supply.
According to the present invention, power supply control is based on " the PM accumulating amount " of PM purification reactor, rather than based on " PM production " relevant with engine speed parameter.Thereby this will be avoided causing the instability of plasma generation and the concentrated combustion of PM owing to producing PM suddenly in a large number.Simultaneously, than providing constant energy to the PM purification reactor, this has saved the needed electric energy of removing PM naturally.
Among the embodiment in this Exhaust gas purifying device, detector comprises the differential pressure gauge of a detection by PM purification reactor pressure reduction.
According to present embodiment, according to by PM purification reactor pressure reduction, the pressure loss that can the assaying reaction device more correctly is determined at actual PM amount of piling up in the PM purification reactor according to the pressure loss then.This is because the pressure loss of PM purification reactor increases along with increasing of PM accumulating amount wherein.
In using the situation to the DPF heating such as heater, during the burning of PM in the PM purification reactor, touch that the PM of catalyzer is most of can be burned to be fallen.Shown in Fig. 5 (a), when a large amount of PM61 are deposited on the catalyzer 63 of substrate 65, have only near the PM of catalyzer 63 is burned, promptly SOF (solvable organic fragment) is burned have been fallen having only away from the position of catalyzer 63.Therefore, shown in Fig. 5 (b), may left behind away from the part PM61 of catalyzer 63.Under the situation shown in Fig. 5 (b), the pressure loss of PM purification reactor and wherein the relation between the PM accumulating amount be different from the situation shown in Fig. 5 (a).So accurately measuring the PM accumulating amount according to the pressure loss of reactor is very difficult sometimes.
With respect to using heater heats DPF that PM is burnt, in the PM purification reactor, be to use plasma that PM is burnt, and the electronics that in the DPF chamber, sent on the negative electrode wall of the top layer PM of deposition, and by NO that plasma produced
2And/or active oxygen burns and removes.In addition, by applying the electric current that voltage passes through deposition PM, also make except PM and burn at other position of the surface of contact of PM and catalyzer.
So,, use plasma easier to measure the accumulating amount of PM based on pressure reduction by the PM purification reactor with respect to using heater heats DPF that PM is burnt.
In one embodiment of the invention, the PM purification reactor comprises electrode and a cellular structure that comprises many cell passages.
According to present embodiment, when the cell passage of the PM in the exhaust by cellular structure, deposit on the sidewall of cell passage, burnedly thereon then fall.
In the present embodiment, electrode produces a nonparallel electric field, at least 45 or 60 degree angles, is more particularly the direction that is substantially perpendicular to honeycomb cell lattice passage especially.
In addition, electrode can comprise a centre electrode and the outer electrode in the centre electrode periphery, and cellular structure can be between centre and peripheral electrode.
Perhaps, reactor can comprise the two or more cellular structures with opposing outer face, and electrode can comprise two or more sets electrode plates on the opposing outer face that is placed on two or more cellular structures respectively.Many group cellular structures and this can be arranged in parallel with each other to electrode plate.At this moment, the electrode plate between the cellular structure can be shared in the adjacent group of cellular structure.
In these cases, electrode produces and the uneven electric field of cell channel direction.So the Coulomb force between PM and the electric field has better captured PM.At this moment, than the insulation cellular structure, be deposited on PM in the cellular structure heat energy in not only being deflated, and the plasma and the electric current that are passed wherein burn.
These and other objects of the present invention, feature and advantage, in conjunction with following detailed explanation and accompanying drawing, it is clear to become for the person of ordinary skill of the art.
Description of drawings
Fig. 1 is an embodiment's of this device block diagram.
Fig. 2 is the flow chart of this device control power supply power supply.
Fig. 3 is the perspective view that is used for the auxiliary PM purification reactor of plasma of this Exhaust gas purifying device.
Fig. 4 is the perspective view of the auxiliary PM purification reactor of another plasma of this Exhaust gas purifying device.
Fig. 5 (a) and (b) be respectively be deposited in PM among the DPF by heating DPF burned before and shape schematic representation afterwards.
Embodiment
Describe the present invention by means of embodiment below with reference to the accompanying drawings and only, but these embodiments and accompanying drawing and not meaning that to limit as the determined scope of the present invention of claim.
Fig. 1 is expression Exhaust gas purifying device of the present invention schematically.In Fig. 1, the exhaust of motor (ENG) is by the auxiliary PM purification reactor 10 of plasma and other Exhaust gas purifying device (not shown), as the NO in PM purification reactor 10 downstreams
xStorage-reducing catalyst is discharged in the atmosphere along arrow 9 directions then.
In this Exhaust gas purifying device, PM purification reactor 10 is positioned at the downstream of motor.The detector that detects the PM accumulating amount in the PM purification reactor is included in before the reactor 10 and pressure gauge afterwards 1, signaling line 2 and computing device 3, and it is connected to control gear 5 by signaling line 4.Computing device 3 certainly is ECU (control unit of engine).Power control 5 is connected to power supply 7 by signaling line 6, and power supply 7 is connected to PM purification reactor 10 by power line 8.
Power control 5 is controlled power supply 7 according to the PM accumulating amount in the PM purification reactor 10, and its accumulating amount is by detection device 1,2,3 mensuration.When following situation, by detection device 1,2, when the 3 PM accumulating amounts of being measured surpassed prearranging quatity, control gear 5 was controlled power supplys 7 by guide line 6, thereby begins power supply to the PM purification reactor, perhaps increases delivery to it.
In this case, comprise pressure gauge 1, the detector of signaling line 2 and computing device 3 is used for detecting the PM accumulating amount at the auxiliary PM purification reactor 10 of plasma.But, any other device also can be used for detecting the PM accumulating amount in the PM purification reactor.So, might be according to the resistance that passes through in the exhaust of reactor, weight, blackout degree change or NO
2Or O
2Content measure PM accumulating amount (NO
2Or O
2Content when the PM accumulating amount increases, reduce because they can consume in the burning of PM).
Fig. 2 represents an embodiment of this Exhaust gas purifying device in the application drawing 1.As shown in Figure 2, when the motor entry into service, the PM purification reactor is connected power supply, and the exhaust of motor is by the auxiliary PM purification reactor 10 of plasma, and here the PM in the exhaust is captured by reactor 10.Then, PM has been stacked into prearranging quatity in the PM purification reactor 10 if detection device 1,2,3 detects, and then control gear 5 control power supplys 7 increase by one period scheduled time of power supply to PM purification reactor 10, perhaps detect the PM accumulating amount up to detector and are less than prearranging quatity.If detection device 1,2,3 detect in the PM purification reactor 10 and to pile up PM and be less than prearranging quatity, and then control gear 5 control power supplys 7 keep constant to the power supply of PM purification reactor 10, and detection device 1,2 then, and 3 detect the PM accumulating amount once more.
Though begin power supply when engine start, control gear also can be controlled the not conventional power supply of power supply 7, only when surpassing prearranging quatity, the PM accumulating amount begins power supply.In addition, can also be as being the production of PM as described in the JPP ' 949 based on engine condition, and the PM accumulating amount among the present invention is powered.In view of the above, can be based on the engine condition normal power supply, and only when the PM accumulating amount surpasses prearranging quatity, begin power supply according to the present invention.
The auxiliary PM purification reactor of plasma that is used for this Exhaust gas purifying device can produce plasma therein and promote the burning of PM.So the auxiliary PM purification reactor of plasma can be several among above-mentioned JPP ' 333 and the IPP ' 949.
In addition, the auxiliary PM purification reactor of plasma also can be the type shown in Fig. 3 perspective view.
Among Fig. 3, label 30 expressions have the once-through type insulation cellular structure of many cell passages, label 34 expression centre electrodes, and label 36 expression outer electrodes, label 38 is illustrated in the needle-like electrodes on the centre electrode 34, label 110 expression power supplys.Insulation cellular structure 30 is between centre electrode 34 and outer electrode 36 and make between the two insulation.The waste gas that contains PM flows to right-hand member from left end shown in arrow among Fig. 3 100, and the cell passage of the cellular structure 30 by being surrounded by outer electrode 36.
When the PM purification reactor that uses as shown in Figure 3, power supply powers up between centre electrode 34 and outer electrode 36, produces radial electric field in cellular structure 30.
Below describe the parts of PM purification reactor among Fig. 3 in detail.
Insulation cellular structure 30 can be by the pottery material manufacturing, as steinheilite.Cellular structure can be once-through type (the cell passage that is cellular structure is nonclogging substantially) or wall flow pattern (the cell passage that is cellular structure is alternately to stop up so-called " diesel particulate filter (DPF) ").Based on present embodiment, the once-through type cellular structure is more suitable in gas-flow resistance, can capture PM fully.In addition, preferred wall flow pattern cellular structure is more suitable for forming the PM passage, by the electric current that penetrates wherein the PM that is captured is burnt then.The insulating properties of insulation cellular structure will fully be higher than PM, guarantees that more multiple current is by depositing PM rather than cellular structure so that PM is burnt.Cellular structure can load for example NO
xCleaning catalyst.
Be added in voltage between the electrode usually above 5kV, preferably be higher than 10kV.Institute is preferably less than 10ms (millisecond), preferably less than 1ms the making alive pulse interval.The voltage that is added between the electrode can be VDC (DC), and alternating voltage (AC) has the voltage of periodic waveform etc.Preferably add dc pulse voltage, because can produce stable coronal discharge.The voltage of DC pulse, pulsewidth and cycle are selected under the condition that can produce coronal discharge.Although these parameters may be subjected to the restriction of auto levelizer design and economic factor etc., preferably select high pulse voltage and short burst cycle to produce coronal discharge.
In Fig. 4,50 expression once-through types have the insulation cellular structure of many cell passages, 54 to 58 expression grid plate electrodes, 110 expression power supplys.In plate electrode 54 to 58, plate electrode 54 and 57 is connected to power supply 110, plate electrode 55,56 and 58 ground connection.Plate electrode 54 to 58 all relies on insulation cellular structure 50 therebetween insulated from each other.The waste gas that contains PM is by being clipped in the cell passage of the insulation cellular structure 50 between the plate electrode 54 to 58, shown in arrow 100.
In use as the PM purification reactor of Fig. 4, power supply 110 plate electrode 54,56 and 58 and adjacent electrode 55 and 57 apply voltage, in cellular structure 50, to produce electric field.In a word, electric field passes the cell passage of the cellular structure 50 of exhaust flow warp.Electric field is deposited on the PM in the exhaust on the sidewall of cellular structure 50 cell passages under the effect of Coulomb force, can better capture PM.
With reference among Fig. 3 to the parts of reactor among explanation Fig. 4 of reactor.
The effect of PM purification reactor is described in following example.These reactors can be used for as Fig. 3 and the described Exhaust gas purifying device of Fig. 4.
Example 1
A PM purification reactor as shown in Figure 3.In this reactor, at once-through type cordierite honeycomb structure (diameter: 30mm, length: 50mm, channel density: 200 passage/square inches, porosity ratio: 65%, average pore size: around the surface 25 μ m (micron)), be wrapped in stainless steel grid (width: 40mm, 304,300 grids of SUS) as outer electrode.The centre electrode (stick electrode) that on the central shaft of cellular structure, fixedly has needle-like electrodes.
Example 2
Similar in this example in Exhaust gas purifying device and the example 1, difference is: wall flow pattern cordierite honeycomb structure (channel density: 300 passage/square inches, porosity ratio: 65%, average pore size: 25 μ m) replaced once-through type cordierite honeycomb in the example 1.
Performance evaluation: PM captures
Reactor is all surrounded and is inserted in the quartz tube that internal diameter is 37mm (millimeter) by the aluminium oxide aperture plate in the example 1 and 2.Centre electrode links to each other with power supply, outer electrode ground connection.For Exhaust gas purifying device, pumped into a part of exhaust (100 liters/minute) of the diesel engine with direct injection of 2400CC discharge capacity, and 4kV voltage (about input power 3W) in addition.PM content is measured by ELPI (electronics low pressure impactor) in the exhaust of device upstream and downstream.The PM purification ratio is determined by PM content difference in the exhaust of device upstream and downstream.The high more then purifying property of this value is good more.Motor is idle running (at 700rpm) all the time.
Performance evaluation: PM oxidation
Example 1 and 2 li PM are in cellular structure fully after the deposition, and cellular structure in temperature is under 120 ℃, drying oven inner drying 24 hours, weighs then.Gained weight is initial weight.Then each reactor is inserted into that (gas: air), centre electrode making alive 15kV continues 15 minutes in the above-mentioned quartz tube.The cellular structure of gained is 120 ℃ of following dryings 24 hours in temperature, weighs then.Gained weight is for handling back weight.The oxidation of PM (burning) amount is initial weight and handles the poor of back weight.The energy of oxidation of PM is calculated by the intake (voltage * electric current * time) of PM amount of oxidation divided by power supply.The low more then PM oxidizability of this value is good more.Only the heating and the needed intake of oxidation PM is about 290KJ/g.
Table 1
| PM captures has electric field (%) not have electric field (%) | PM energy of oxidation (KJ/g) | |
| Example 1 (once-through type) example 2 (wall flow pattern) | ????11????????????69 ????45????????????68 | ????65 ????67 |
PM in the table 1 captures performance and shows that the electric field in the cellular structure has improved the capture of PM.Reach close PM at the cellular structure that powers up back once-through type and wall flow pattern and captured effect.PM oxidizability in the table 1 shows the mode that heats with respect to only, and electric current has reduced needed PM energy of oxidation.
Example 3
A PM purification reactor as shown in Figure 4 is provided.Promptly at the once-through type cordierite honeycomb structure (channel density: 200 passage/square inches of cuboid shape, porosity ratio: 65%, average pore size: 25 μ m, highly: 15 passages, width: 5 passages, length: (SUS 304, highly: 24mm to insert the netted electrode of stainless steel 50mm), length: 45mm, 300 or 30 grids).
In the test, waste gas passes reactor along direction shown in the arrow among Fig. 4 100.Mesh electrode connects power supply and ground connection respectively.The electrode that connects power supply is an anode, and the electrode of ground connection is a negative electrode.
Performance evaluation: PM captures
The mensuration of PM capture rate is with example 1 and example 2, and difference is: the reactor in the example 3 is surrounded and is inserted in the acrylic fiber pipe that profile is 34 * 48mm by the aluminium oxide aperture plate, and DC electrical source that electrode adds is 4kV, and power is about 3W.
Performance evaluation: PM oxidation
The mensuration of PM energy of oxidation is with example 1 and example 2, and difference is: the reactor in the example 3 is inserted in the acrylic fiber pipe that (gas: air), making alive 10kV continues 20 minutes as mentioned above.
Table 2
| PM captures has electric field (%) not have electric field (%) | PM energy of oxidation (KJ/g) | |
| Example 3 | ??19???????????67 | ????70 |
PM in the table 2 captures performance and shows that the electric field in the cellular structure has improved the capture of PM.PM oxidizability in the table 2 shows the mode that heats with respect to only, and electric current has reduced needed PM energy of oxidation.
It will be appreciated by persons skilled in the art that the above-mentioned only embodiment by case description is not a limitation of the present invention, and under the situation that does not depart from the scope of the invention that limits by accessory claim, can carry out various changes and modification.
Claims (6)
1. Exhaust gas purifying device comprises:
Plasma is assisted the PM purification reactor;
Be used for detecting the detection device of described PM purification reactor PM accumulating amount;
The power supply that is used for described PM purification reactor;
Be used for controlling the control gear of described power supply according to described detection device signal;
When the PM of described detection means measure accumulating amount surpassed prearranging quatity, described control gear was controlled described power supply and is begun power supply to described PM purification reactor, perhaps increases delivery to described PM purification reactor.
2. according to the Exhaust gas purifying device of claim 1, wherein detection device comprises the differential pressure gauge that is used for measuring by PM purification reactor pressure difference.
3. according to the Exhaust gas purifying device of claim 1, wherein said PM purification reactor comprises electrode and has the insulation cellular structure of many cell passages.
4. according to the Exhaust gas purifying device of claim 3, wherein electrode produces the electric field that is not parallel to described honeycomb cell lattice channel direction.
5. according to the Exhaust gas purifying device of claim 4, wherein electrode comprises the outer electrode of a centre electrode and encirclement centre electrode, and cellular structure is between centre electrode and outer electrode.
6. according to the Exhaust gas purifying device of claim 4, wherein said cellular structure has opposed outer surface, described electrode comprises a pair of plate electrode that places the opposing outer face of described cellular structure respectively, and each group of described cellular structure and described pair of plate-shaped electrode are arranged in parallel with each other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP207896/2003 | 2003-08-19 | ||
| JP2003207896A JP2005061246A (en) | 2003-08-19 | 2003-08-19 | Exhaust emission control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1584301A true CN1584301A (en) | 2005-02-23 |
Family
ID=34055948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200410057790.3A Pending CN1584301A (en) | 2003-08-19 | 2004-08-19 | Exhaust gas purifying apparatus |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20050039441A1 (en) |
| EP (1) | EP1508677A1 (en) |
| JP (1) | JP2005061246A (en) |
| CN (1) | CN1584301A (en) |
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| CN105927326A (en) * | 2016-06-17 | 2016-09-07 | 浙江大学 | Automatic regenerating device and regenerating method of marine diesel engine DPF |
| CN105986859A (en) * | 2015-03-17 | 2016-10-05 | 丰田自动车株式会社 | Exhaust emission control system of internal combustion engine |
| CN106457261A (en) * | 2014-04-15 | 2017-02-22 | 丰田自动车株式会社 | Oil removal apparatus |
| CN106762039A (en) * | 2016-12-21 | 2017-05-31 | 李光武 | A kind of catalytic convention design and automobile exhaust system |
| WO2020083144A1 (en) * | 2018-10-22 | 2020-04-30 | 上海必修福企业管理有限公司 | Engine exhaust gas dust-removal system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004029524B4 (en) * | 2004-06-18 | 2007-12-06 | Robert Bosch Gmbh | Method and device for the defined regeneration of sooty surfaces |
| EP1960639B1 (en) * | 2006-08-01 | 2015-06-17 | Korea Institute Of Machinery & Materials | Reduction system for particulate materials in exhaust gas |
| JP2009184862A (en) * | 2008-02-05 | 2009-08-20 | Ngk Insulators Ltd | Plasma reactor |
| DE102009041090A1 (en) | 2009-09-14 | 2011-03-24 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Apparatus and method for treating exhaust gas containing soot particles |
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| WO2017002828A1 (en) * | 2015-06-30 | 2017-01-05 | ダイハツ工業株式会社 | Plasma reactor applied voltage control device and plasma reactor control device |
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| DE4416676C2 (en) * | 1994-05-11 | 2002-11-07 | Siemens Ag | Device for the detoxification of exhaust gases from mobile systems |
| JPH08260942A (en) * | 1995-03-28 | 1996-10-08 | Hideo Yoshikawa | Emission control device |
| US6038854A (en) * | 1996-08-19 | 2000-03-21 | The Regents Of The University Of California | Plasma regenerated particulate trap and NOx reduction system |
| US5827407A (en) * | 1996-08-19 | 1998-10-27 | Raytheon Company | Indoor air pollutant destruction apparatus and method using corona discharge |
| GB9715409D0 (en) * | 1997-07-23 | 1997-09-24 | Aea Technology Plc | Gas purification |
| GB2351923A (en) * | 1999-07-12 | 2001-01-17 | Perkins Engines Co Ltd | Self-cleaning particulate filter utilizing electric discharge currents |
| DE10130163B4 (en) * | 2000-11-21 | 2012-01-12 | Siemens Ag | Arrangement for reducing carbonaceous particulate emissions from diesel engines |
| FR2830275B1 (en) * | 2001-10-01 | 2004-06-11 | Renault | EXHAUST GAS TREATMENT SYSTEM FOR A COMBUSTION ENGINE |
| FR2830566B1 (en) * | 2001-10-04 | 2004-02-27 | Renault | EXHAUST GAS TREATMENT SYSTEM FOR A COMBUSTION ENGINE |
| US7514047B2 (en) * | 2003-01-15 | 2009-04-07 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purifying apparatus |
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2003
- 2003-08-19 JP JP2003207896A patent/JP2005061246A/en not_active Withdrawn
-
2004
- 2004-08-11 US US10/915,380 patent/US20050039441A1/en not_active Abandoned
- 2004-08-18 EP EP04019564A patent/EP1508677A1/en not_active Withdrawn
- 2004-08-19 CN CN200410057790.3A patent/CN1584301A/en active Pending
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| CN106457261A (en) * | 2014-04-15 | 2017-02-22 | 丰田自动车株式会社 | Oil removal apparatus |
| CN106457261B (en) * | 2014-04-15 | 2018-02-16 | 丰田自动车株式会社 | Degreasing unit |
| CN105986859A (en) * | 2015-03-17 | 2016-10-05 | 丰田自动车株式会社 | Exhaust emission control system of internal combustion engine |
| CN105986859B (en) * | 2015-03-17 | 2018-10-09 | 丰田自动车株式会社 | The emission control system of internal combustion engine |
| CN105927326A (en) * | 2016-06-17 | 2016-09-07 | 浙江大学 | Automatic regenerating device and regenerating method of marine diesel engine DPF |
| CN106762039A (en) * | 2016-12-21 | 2017-05-31 | 李光武 | A kind of catalytic convention design and automobile exhaust system |
| WO2020083144A1 (en) * | 2018-10-22 | 2020-04-30 | 上海必修福企业管理有限公司 | Engine exhaust gas dust-removal system and method |
| WO2020083130A1 (en) * | 2018-10-22 | 2020-04-30 | 上海必修福企业管理有限公司 | Engine exhaust dust removing system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1508677A1 (en) | 2005-02-23 |
| JP2005061246A (en) | 2005-03-10 |
| US20050039441A1 (en) | 2005-02-24 |
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