CN103670605A - Diesel engine and particulate matter catcher regenerating device thereof - Google Patents
Diesel engine and particulate matter catcher regenerating device thereof Download PDFInfo
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- CN103670605A CN103670605A CN201310566777.XA CN201310566777A CN103670605A CN 103670605 A CN103670605 A CN 103670605A CN 201310566777 A CN201310566777 A CN 201310566777A CN 103670605 A CN103670605 A CN 103670605A
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Abstract
The invention discloses a particulate matter catcher regenerating device. The particulate matter catcher regenerating device comprises a particulate matter catcher and an oxidation catalytic converter. The particulate matter catcher and the oxidation catalytic converter are longitudinally perpendicularly arranged, an airflow swirling device (2) is arranged below the oxidation catalytic converter, and a particulate matter collector (3) is arranged on the airflow swirling device (2). By the adoption of the device, it can be guaranteed that the load of particulate matter inside a DPF is always low, and requirements of an aftertreatment system can be met without using an active regenerating system of the DPF and conducting manual ash removal. The invention further discloses a diesel engine with the regenerating device.
Description
Technical field
The present invention relates to technical field of engines, be particularly applied to the particulate matter trap reclaimer of tail gas treatment system of diesel engine.The invention still further relates to the diesel engine that is provided with described reclaimer.
Background technique
Along with China more and more payes attention to environmental protection, stricter emission control regulations are put into effect in succession in recent years, for the subject matter that current motor vehicle emission realizes Europe VI that has been controlled to of diesel engine of vehicle particulate emission pollutant.
The exhaust particulate of diesel engine mainly comprises three kinds of compositions: the soot (Soot) not firing, organic soluble material (the Soluble Organic Fractions of Adsorption on Surface, SOF) and sulphate, wherein particulate emission material major part is that the molecule of carbon and carbide forms.
DPF(Diesel Particulate Filter) be the particulate matter trap of particle (PM) in a kind of elimination diesel exhaust gas, mainly by diffusion, deposition and shock mechanism, carry out the particulate in trap filter diesel exhaust gas, arresting efficiency can reach more than 90%.
DOC(Diesel Oxidation Catalysis) be a kind of oxidation catalytic converter of particulate matter, it is noble metal-coating catalyzer (as Pt etc.) on honeycomb ceramic carrier, object is in order to reduce HC, CO in diesel engine vent gas and the chemical reaction activation capacity of SOF, makes the oxygen in these substances and tail gas at lower temperature, carry out oxidation reaction and finally be converted into CO
2and H
2o.
DPF combines use with DOC can form particle collection system, and its basic functional principle is: when diesel exhaust gas flows through DOC, under 200-400 ℃ of temperature conditions, CO and HC are first almost all oxidized to CO
2and H
2o, NO is converted to NO simultaneously
2, exhaust out enters DPF from DOC, and wherein particulate is trapped in the filter core of filter, and remaining more clean exhaust enters in atmosphere.
Lengthening along with the operating time, the particle of piling up in DPF filter is more and more, not only affect the filtering effect of catcher, also can increase exhaust back pressure, thereby affect ventilation and the burning of diesel engine, cause power stage to reduce, oil consumption increases, so the particle of how processing in time on catcher is the key of DPF technology.
DPF is by repeating the PM(particulate matter of regenerating) to control and maintain certain DPF front and back pressure reduction, regeneration has initiative regeneration and two kinds of methods of passive regeneration: initiative regeneration refers to and utilizes outside energy to improve the temperature in catcher, makes particulate ignition.When the temperature in filter reaches 600 ℃, the particulate matter of deposition will oxidizing fire, if temperature does not reach 600 ℃, too much sediments will blocking filter, at this moment just need to utilize external energy (electric heater for example, the change of burner or engine operating condition) improve the temperature in DPF, make particulate matter oxidizing fire.
Passive regeneration refers at a certain temperature, and the inner NO2 of DPF reacts a kind of regeneration techniques that eliminates carbon granule with C.NO
2the particle being captured is had to very strong oxidability, the NO that utilizes DOC to produce
2as oxygenant, remove the particulate in DPF and generate CO
2, and NO
2be reduced to again NO, thereby reach the object of removing particulate.
Traditional dpf regeneration mode need to spray into a certain amount of fuel oil at tailpipe, by DOC temperature raising to 600 ℃, particulate matter is burnt, and this method needs device and the control system of a set of complexity, and needs extra oil spout, can increase the oil consumption of motor.
And regeneration is merely able to the carbon granule of DPF inside to burn, but the ash content of the inner trapping of DPF do not burn, and can cause ash content to be accumulated in DPF.Although the accumulative speed of ash content is very slow, it finally can cause DPF front and back pressure reduction to rise, thereby affects the operating life of DPF, after so DPF is arranged on vehicle, after certain distance travelled, along with the increase of ashes accumulate value, need to carry out artificial deashing to DPF.General ash removal method is that DPF is disassembled, and by pressurized gas blowback or water, is cleaned the ash of DPF inside is distinguished, very inconvenient.
Therefore, how improving the regenerated way of DPF, eliminate the dependence of DPF to oil spout initiative regeneration and artificial deashing, is those skilled in the art's technical issues that need to address.
Summary of the invention
The first object of the present invention is to provide a kind of particulate matter trap reclaimer.This device can guarantee that the particulate matter load of DPF inside is all the time in lower state, without using DPF initiative regeneration system and artificial deashing can meet after-treatment system demand.
The second object of the present invention is to provide a kind of diesel engine that is provided with described particulate matter trap reclaimer.
For realizing above-mentioned the first object, the invention provides a kind of particulate matter trap reclaimer, comprising:
Particulate matter trap;
Oxidation catalytic converter;
Described particulate matter trap and oxidation catalytic converter are longitudinally arranged vertically, and the below of described oxidation catalytic converter is provided with air-flow rotary unit;
Described air-flow rotary unit is provided with Particulate Filter.
Preferably, described air-flow rotary unit comprises housing;
Described housing is rounded on cross section, the channel connection of its upper end and described oxidation catalytic converter, and lower end closed, side is tangentially provided with suction tude, the inner air-flow convolution district that forms.
Preferably, described Particulate Filter comprises for holding the collecting box of particulate matter;
Described air-flow convolution district is connected with described collecting box by the collection mouth on its side.
Preferably, the inner bottom surface of described collecting box is lower than the plane at the place, bottom in described air-flow convolution district.
Preferably, a described collection mouthful place is provided with particulate matter filter screen.
Preferably, the bottom center place in described air-flow convolution district is provided with the flow deflecting cone raising up.
Preferably, the bottom in described air-flow convolution district and side seamlessly transit and are circular arc.
Preferably, described Particulate Filter is connected by demountable structure or parts with air-flow rotary unit.
Preferably, the housing of described air-flow rotary unit and described particulate matter trap and oxidation catalytic converter is integral type structure.
For realizing above-mentioned the second object, the invention provides a kind of diesel engine, comprise engine body and exhaust-gas treatment system, described exhaust-gas treatment system is provided with the particulate matter trap reclaimer described in above-mentioned any one.
Particulate matter trap reclaimer provided by the invention mainly comprises longitudinal vertically arranged particulate matter trap and oxidation catalytic converter, be positioned at the air-flow rotary unit of oxidation catalytic converter below, and the Particulate Filter of being located at air-flow rotary unit, it can utilize the vibration of vehicle, for example vehicle is when low speed operating mode is travelled on rough road surface, waste gas flow velocity is little, motor that DPF traps produces the large particle thing being gathered in DPF inside compared with large particulate matter or small particle and can come off because of the effect of automobile vibration and gravity, after DOC, enter air-flow rotary unit, and air-flow rotary unit can form engine exhaust the air-flow of convolution disturbance, under the effect of exhaust convolution, the large particle thing coming off from DPF is collected in Particulate Filter, there is the passive regeneration of particulate matter in the inner moment of DPF simultaneously, the particulate matter load that guarantees DPF inside through these two kinds of regenerated way actings in conjunction is all the time in lower state, thereby can reduce initiative regeneration and the artificial deashing number of times of DPF or not adopt initiative regeneration or artificial deashing, thereby reduce the oil consumption of diesel engine, improve the reliability of DPF.
In a kind of preferred version, the inner bottom surface of described collecting box is lower than the plane at the place, bottom in described air-flow convolution district.Like this, can guarantee that the carbon soot particles dropping enters collecting box under the effect of rotary centrifugal force, make particle enter in collecting box simultaneously and can again not enter exhaust.
In another kind of preferred version, the bottom center place in described air-flow convolution district is provided with the flow deflecting cone raising up.This flow deflecting cone can form annular air-flow path by bottom and the side in its conical surface and air-flow convolution district on the one hand, thereby be beneficial to the air-flow that exhaust forms convolution disturbance, its conical surface can be by the evengranular circumferential distribution to gyration airflow dropping on the other hand, thereby makes the Particulate Filter that enters that particle can be more prone to.
Diesel engine provided by the invention is provided with described particulate matter trap reclaimer, and because described particulate matter trap reclaimer has above-mentioned technique effect, the diesel engine that is provided with this particulate matter trap reclaimer also possesses corresponding technique effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of particulate matter trap reclaimer provided by the present invention;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is the A-A view of Fig. 1;
Fig. 4 is the B-B view of Fig. 3;
Fig. 5 is the stereogram of air-flow rotary unit shown in Fig. 1;
Fig. 6 is the working principle schematic diagram of particulate matter trap reclaimer shown in Fig. 1;
Fig. 7 is the structural representation of another kind of Particulate Filter.
In figure:
1. suction tude 2. air-flow rotary unit 2-1. air-flows convolutions district 2-2. flow deflecting cone 3. Particulate Filter 3-1 collecting box 3-2 particulate matter filter screen 4.DOC 5.DPF 6. steam outlet pipes
Embodiment
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1 to Fig. 5, Fig. 1 is the structural representation of a kind of embodiment of particulate matter trap reclaimer provided by the present invention; Fig. 2 is the plan view of Fig. 1; Fig. 3 is the A-A view of Fig. 1; Fig. 4 is the B-B view of Fig. 3; Fig. 5 is the stereogram of air-flow rotary unit shown in Fig. 1.
In a kind of embodiment, diesel particulate catcher regeneration device provided by the invention, mainly suction tude 1, air-flow rotary unit 2, Particulate Filter 3, DOC4, DPF5 and steam outlet pipe 6, consist of, wherein DPF5 can adopt honeycomb ceramic filter filter.
Air-flow rotary unit 2 is integral type structure with the housing of DOC4, DPF5, and cylindrical on the whole, three is longitudinally arranged vertically, and DPF5 is positioned at top, and in the middle of DOC4 is positioned at, air-flow rotary unit 2 is positioned at bottom, and is provided with Particulate Filter 3.
The housing of air-flow rotary unit 2 is rounded on cross section, the channel connection of its upper end and DOC4, lower end closed, side is tangentially provided with suction tude 1, the inner air-flow convolution district 2-1 that forms, and air-flow tangentially enters housing through suction tude 1 under pressure, in shell, do rotation motion, particulate matter in air-flow, because being subject to the periphery in rotary current compared with large centrifugal force, finally enters Particulate Filter 3, and steam outlet pipe 6 is tangentially located at the exhaust end of DPF5.
The bottom of air-flow convolution district 2-1 and side seamlessly transit and are circular arc, and are provided with in centre the flow deflecting cone 2-2 raising up.This flow deflecting cone 2-2 can form annular air-flow path by bottom and the side of its conical surface and air-flow convolution district 2-1 on the one hand, thereby be beneficial to the air-flow that exhaust forms convolution disturbance, its conical surface can be by the evengranular circumferential distribution to gyration airflow dropping on the other hand, thus make that particle can be more prone to enter Particulate Filter 3.
Particulate Filter 3 adopts the collecting box 3-1 that can hold particulate matter, and air-flow convolution district is connected with collecting box by the collection mouth on its side, and is provided with particulate matter filter screen 3-2 at a collection mouthful place.
The inner bottom surface of collecting box 3-1 is lower than the plane at the place, bottom of air-flow convolution district 2-1.Like this, can guarantee that the carbon soot particles dropping enters collecting box 3-1 under the effect of rotary centrifugal force, makes particle enter in collecting box 3-1 simultaneously and can again not enter exhaust.
In addition, collecting box 3-1 is connected by demountable structure or parts with air-flow rotary unit 2.After carbon soot particles is collected to a certain degree, collecting box 3-1 is conveniently detachable carries out cleaning work.
Certainly, also can clear up by offer the mode of floss hole on collecting box 3-1, and without dismounting deashing.
Please refer to Fig. 6, Fig. 6 is the working principle schematic diagram of particulate matter trap reclaimer shown in Fig. 1.
As shown in the figure, the tail gas that motor gives off enters in diesel filter device through suction tude 1, first enters air-flow rotary unit 2, form immediately the air-flow of convolution disturbance, then enter in DOC4, noble metal-coating catalyzer on DOC4 carrier, can be oxidized to NO by NO in tail gas
2; Waste gas enters in DPF5 after DOC4, and DPF5 carrier is one end perforate, the ceramic monolith of the other end sealing, and air-flow passes through from wall, and the particulate matter in waste gas is owing to being deposited on wall by wall, thereby plays the effect of trap particulate matter.
Along with particle collection is inner assemble more and more of DPF5, need in real time the carbon carrying capacity of DPF5 inner accumulation be eliminated.Diesel filter system and the device of the present invention's design can be realized two kinds of regenerated ways:
1.DPF5 passive regeneration: by the inner NO of DPF5
2the chemical reaction occurring with C eliminates carbon granule, and this regeneration is in real time at DPF5 internal-response.
2. in vehicle traveling process, DPF5 vibrates because of the excitation on motor and road surface, the particulate matter trapping in DPF5 can be because vibration comes off from catcher, under Action of Gravity Field, from the passage of DOC4, drop in air-flow rotary unit 2, now exhaust drives the particle dropping in the rotation of air-flow rotary unit high speed, and particle enters into Particulate Filter 3 under the effect of centrifugal force.
Above two kinds of regenerated ways occur simultaneously, and acting in conjunction guarantees that the particulate matter load of DPF5 inside is all the time in lower state, without using DPF initiative regeneration system can meet after-treatment system regeneration demand.
It should be noted that, in order to guarantee that the present invention can realize the 2nd kind of regenerated way, said apparatus must vertically fixedly mount, the layout design of DOC4 and DPF5 will meet arrangement requirement, assurance system is not under by the prerequisite of flutter failure, improve the ocsillator strenght of system, to improve particulate matter collecting efficiency as far as possible.
This device can shake off the ash content of DPF5 inside get off by vibration, under the effect of air-flow, collect in Particulate Filter 3, without DPF oil spout initiative regeneration, the problem that does not exist above-mentioned oil spout regeneration to exist, also without periodic cleaning ash content, avoided regular deashing to bring the inconvenience in use, had great convenience for the user to use.
Certainly, above-described embodiment is only preferred version of the present invention, is specifically not limited to this, can make according to actual needs pointed adjustment on this basis, thereby obtains different mode of executions.As shown in Figure 7, collecting box 3-1 can be divided into lateral part and longitudinal component, collect the left end that mouth is positioned at its lateral part, the right-hand member of longitudinal component in lateral part is attached thereto logical, make to collect mouthful the certain distance that staggers with particulate matter deposition portion, can more effectively prevent that like this particulate matter of collecting from entering in exhaust again; Or, according to need to adjusting the position on air-flow rotary unit side Particulate Filter 3 of installing, etc.Because mode in the cards is more, just illustrate no longer one by one here.
Except above-mentioned particulate matter trap reclaimer, the present invention also provides a kind of diesel engine, comprises engine body and exhaust-gas treatment system, and described exhaust-gas treatment system is provided with particulate matter trap reclaimer mentioned above, all the other structures please refer to prior art, repeat no more herein.
Above particulate matter trap reclaimer provided by the present invention and diesel engine are described in detail.Applied specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation is just for helping to understand core concept of the present invention.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a particulate matter trap reclaimer, comprising:
Particulate matter trap;
Oxidation catalytic converter;
It is characterized in that, described particulate matter trap and oxidation catalytic converter are longitudinally arranged vertically, and the below of described oxidation catalytic converter is provided with air-flow rotary unit (2);
Described air-flow rotary unit (2) is provided with Particulate Filter (3).
2. particulate matter trap reclaimer according to claim 1, is characterized in that, described air-flow rotary unit (2) comprises housing;
Described housing is rounded on cross section, the channel connection of its upper end and described oxidation catalytic converter, and lower end closed, side is tangentially provided with suction tude (1), the inner air-flow convolution district (2-1) that forms.
3. particulate matter trap reclaimer according to claim 2, is characterized in that, described Particulate Filter (3) comprises the collecting box (3-1) for holding particulate matter;
Described air-flow convolution district (2-1) is connected with described collecting box (3-1) by the collection mouth on its side.
4. particulate matter trap reclaimer according to claim 3, is characterized in that, the inner bottom surface of described collecting box (3-1) is lower than the plane at the place, bottom in described air-flow convolution district (2-1).
5. particulate matter trap reclaimer according to claim 4, is characterized in that, a described collection mouthful place is provided with particulate matter filter screen (3-2).
6. according to the particulate matter trap reclaimer described in claim 2 to 5 any one, it is characterized in that, the bottom center place in described air-flow convolution district (2-1) is provided with the flow deflecting cone (2-2) raising up.
7. according to the particulate matter trap reclaimer described in claim 2 to 5 any one, it is characterized in that, the bottom in described air-flow convolution district (2-1) and side seamlessly transit and are circular arc.
8. according to the particulate matter trap reclaimer described in claim 1 to 5 any one, it is characterized in that, described Particulate Filter (3) is connected by demountable structure or parts with air-flow rotary unit (2).
9. particulate matter trap reclaimer according to claim 8, is characterized in that, described air-flow rotary unit (2) is integral type structure with the housing of described particulate matter trap and oxidation catalytic converter.
10. a diesel engine, comprises engine body and exhaust-gas treatment system, it is characterized in that, described exhaust-gas treatment system is provided with the particulate matter trap reclaimer described in the claims 1 to 9 any one.
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| CN201310566777.XA CN103670605B (en) | 2013-11-14 | 2013-11-14 | A kind of diesel engine and particulate matter trap regenerating unit thereof |
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| CN201310566777.XA CN103670605B (en) | 2013-11-14 | 2013-11-14 | A kind of diesel engine and particulate matter trap regenerating unit thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343503A (en) * | 2014-10-25 | 2015-02-11 | 陈建红 | Automobile tail gas filtering device adopting cold air |
| CN105134345A (en) * | 2015-08-31 | 2015-12-09 | 洛阳市华宝非金属材料有限公司 | Particle catcher used for diesel engine |
| CN105833645A (en) * | 2016-05-05 | 2016-08-10 | 深圳市威尔仕机电有限公司 | Waste gas treatment device and method |
| CN109187932A (en) * | 2018-09-29 | 2019-01-11 | 潍柴动力股份有限公司 | A kind of machine oil quality detecting method and device |
| CN110237711A (en) * | 2016-08-08 | 2019-09-17 | 尼古拉斯.G.托希克 | Discharge reduces system and method |
| CN114738096A (en) * | 2022-04-13 | 2022-07-12 | 淄博青禾检测科技有限公司 | Carbon loading capacity calculation system of heavy diesel vehicle particle catcher |
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| CN114738096B (en) * | 2022-04-13 | 2023-06-09 | 淄博青禾检测科技有限公司 | Carbon loading calculation system of heavy diesel vehicle particle catcher |
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|---|---|
| CN103670605B (en) | 2016-06-08 |
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