CN101265823B - Exhausting equipment for diesel - Google Patents
Exhausting equipment for diesel Download PDFInfo
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- CN101265823B CN101265823B CN2007100862982A CN200710086298A CN101265823B CN 101265823 B CN101265823 B CN 101265823B CN 2007100862982 A CN2007100862982 A CN 2007100862982A CN 200710086298 A CN200710086298 A CN 200710086298A CN 101265823 B CN101265823 B CN 101265823B
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Abstract
The invention relates to an exhausting device for a diesel engine, which supplies liquid fuel (6) to a gas generator (3) from a supply source (5) of the liquid fuel (6); the gas generator (3) transforms the liquid fuel (6) into combustible gas (7) and educes a supply channel for the combustible gas (8); the supply channel for the combustible gas (8) is provided with an outlet for combustible gas (9) that communicates with the exhaust gas route on the upper part of a diesel particulate filter (2); the combustible gas flowing from the outlet for combustible gas (9) is combusted in exhaust gas (10) in order to produce the combustion heat for combusting the fine particles left in the exhaust gas (10) of the filter (2). Applied in the exhausting device for diesel engine, the exhausting device for diesel engine can accommodate a shell body (11) of the filter (2) and accommodate at least part of the gas generator (3).
Description
Technical field
The present invention relates to a kind of venting gas appliance that is used for diesel engine, more specifically relate to and a kind ofly can make itself compact venting gas appliance that is used for diesel engine.
Background technique
The instance of traditional venting gas appliance that is used for diesel engine is the same with the present invention, and liquid fuel is supplied to gas generator from the liquid fuel supply source, and this gas generator converts liquid fuel to inflammable gas.The supply passage of inflammable gas is drawn from gas generator.The supply passage of inflammable gas has the inflammable gas outlet that is communicated with the exhaust path at the diesel particulate filter upper reaches.The inflammable gas that flows out from inflammable gas outlet is burnt waste gas, thereby produce ignition heat, the waste gas fine grained burning that utilizes this ignition heat to make to residue in filter.
Such venting gas appliance has the following advantages: even work under the lower light load situation of EGT; The ignition heat of inflammable gas also can make will inflow filter EGT raise, thus the gas of combustion fine grained so that this filter can reuse.
Yet above-mentioned traditional exhaust device has and the housing gas separated generator that holds filter, therefore can go wrong.
Conventional art has following problem.
The size of < problem>venting gas appliance is big.
Because gas generator separates with the housing that holds filter, so the size of venting gas appliance is big.
Summary of the invention
The purpose of this invention is to provide a kind of venting gas appliance that is used for diesel engine that can address the above problem, more specifically provide and a kind ofly can make itself compact venting gas appliance that is used for diesel engine.
Has following characteristic theme like the present invention who is limited in the claim 1.
Like Fig. 1 illustrated, the venting gas appliance that is used for diesel engine comprises the supply source 5 of liquid fuel, this supply source 5 is supplied to gas generator 3 with liquid fuel 6.Gas generator 3 converts liquid fuel 6 to inflammable gas 7.Draw an inflammable gas supply passage 8 from gas generator 3, and this inflammable gas supply passage 8 has the outlet 9 of inflammable gas 7.Inflammable gas outlet 9 is communicated with the exhaust path 1 at diesel particulate filter 2 upper reaches.The inflammable gas 7 that flows out from inflammable gas outlet 9 burn waste gas 10, with generation can combustion residue in the fine grain ignition heat of waste gas at filter 2 places.Be used for the venting gas appliance of diesel engine, holding the housing that the filter 11 ccontaining generators of portion gas at least 3 of filter 2.
(invention of claim 1)
< effect>can make venting gas appliance compact.
Like Fig. 1 illustrated, comprise the housing that the contains filter 11 ccontaining generators of portion gas at least 3 of filter 2.Therefore, with the contrast that gas generator 3 separates with the housing that contains filter 11, can make venting gas appliance become compact.
(invention of claim 2)
Except through the given effect of the invention of claim 1, following effect is provided also.
< effect>can be made this venting gas appliance with low cost.
As shown in Figure 1, will be from the fuel of fuel tank (fuel reservoir) 5a of diesel engine as liquid fuel 6.When liquid fuel 6 mixed with air 44, the air of automatic pressure intensifier 39 was as this air 44 in the future.Therefore, have fuel tank 5a and the fuel supply source and the air supply source that pressurized machine 39 can be used separately as gas generator 3 of the diesel engine of pressurized machine 39, thereby can make this venting gas appliance with low cost.
(invention of claim 3)
Except the effect that invention produced described in claim 1 or 2, following effect is provided also.
< effect>can produce gas expeditiously in catalyst case.
Like Fig. 2 (A) illustrated, catalyst case 51 has the top that is provided with heat conduction board 52.Upper surface along heat conduction board 52 forms fuel through gap 53.Fuel has by the outer rim of opening so that the fuel outlet 54 that leads to catalyst case 51 to be provided through gap 53.The catalytic combustion heat that in catalyst case 51, produces conducts to fuel through gap 53 through heat conduction board 52.Therefore; Liquid fuel 6 passes through in the gap 53 by preheating with the fuel of air 44 in catalyst case 51 fronts; Thereby the gasification of accelerating liquid fuel 6, and the homogeneous mixture of air and fuel is supplied to catalyst case 51, improve the efficient that produce gases in the catalyst case 51 thus.
< effect>can heat this heat conduction board with low cost.
Like Fig. 2 (A) illustrated, the catalytic combustion heat that in catalyst case 51, produces conducts to fuel through gap 53 through heat conduction board 52.Therefore, when producing catalytic combustion heat, need not wait and heat heat conduction board 52 through glow plug 45, thus can low-cost heating heat conduction board 52.
(invention of claim 4)
Except the effect that the described invention of claim 3 is produced, following effect is provided also.
< effect>can realize beginning rapidly to produce the effect of gas.
Shown in Fig. 2 (A), the liquid fuel 6 that flows out from fuel outlet 54 is directed the peripheral edge portion 56a reception of plate 56, and is directed plate 56 guiding with the heat release part 45a near glow plug 45.Therefore; In catalyst case 51, produce before the catalytic combustion heat; In the absence of catalytic combustion heat; Make glow plug 45 heat release when beginning to produce gas, the liquid fuel 6 that flows out from fuel outlet 54 through the guiding of guide plate 56 near the heat release part 45a of glow plug 45, and in the front of catalyst case 51 by preheating.This has accelerated the gasification of liquid fuel 6, the homogeneous mixture of air and fuel is incorporated in the catalyst case 51, and comes activating catalyst 51a with the heat of glow plug 45, thereby begin to produce gas rapidly.
(invention of claim 5)
Except by the effect that claim 4 produced, following effect is provided also.
< effect>can be carried out the operation that begins to produce gas rapidly.
Like Fig. 2 (A) illustrated, flame arrest material 57 is packed in the space between heat conduction board 52 and the guide plate 56.When making glow plug 45 heat releases, the heat of the glow plug 45 of this heat release conducts to heat conduction board 52 and guide plate 56 through flame arrest material 57.In catalyst case 51, produce before the catalytic combustion heat thus; In the absence of catalytic combustion heat; Through making glow plug 45 heat release when beginning to produce gas; Liquid fuel 6 and air 44 through the fuel of catalyst case 51 fronts through gap 53 during with flame arrest material 57 by preheating, and the liquid fuel 6 that flows out through gap 53 from fuel through guide plate 56 guiding the time by preheating.This causes the gasification of liquid fuel 6 to be accelerated, and the homogeneous mixture of air and fuel is guided to catalyst case 51, thereby can carry out the operation that begins to produce gas rapidly.
< effect>can produce gas efficiently in catalyst case.
Like Fig. 2 (A) illustrated, flame arrest material 57 is packed in the space between heat conduction board 52 and the guide plate 56.When catalyzer during in catalyst case 51 internal combustion, catalytic combustion heat conducts to heat conduction board 52 through guide plate 56 and flame arrest material 57.Liquid fuel 6 and air 44 through the fuel of catalyst case 51 fronts through gap 53 during with flame arrest material 57 by preheating.This has accelerated the gasification of liquid fuel 6, and the homogeneous mixture of air and fuel is introduced catalyst case 51, thereby has improved the efficient that produces gas in the catalyst case 51.
The cause thermal damage of the gas generator that < effect>can suppress to be caused by flame combustion.
Shown in Fig. 2 (A), flame arrest material 57 is packed in the space between heat conduction board 52 and the guide plate 56.Because the flame arrest function of flame arrest material 57 has suppressed between heat conduction board 52 and guide plate 56, flame combustion to occur, and the cause thermal damage of the gas generator that can prevent to cause by flame combustion.
(invention of claim 6)
Except the effect that is produced by the described invention of claim 5, following effect is provided also.
< effect>can produce gas efficiently in catalyst case.
Like Fig. 2 (A) illustrated, guide plate 56 have with catalyst case 51 in the lower surface that contacts of catalyzer 51a.As catalyzer 51a during in catalyst case 51 internal combustion, catalytic combustion heat conducts to guide plate 56 effectively, is also conducted to flame arrest material 57 and heat conduction board 52.Therefore, liquid fuel 6 and air 44 quilt preheating effectively when the flame arrest material 57 through catalyst case 51 fronts passes through gap 53 with fuel produce gas expeditiously thereby make in the catalyst case 51.
(invention of claim 7)
Except the effect that is produced by claim 5 or the described invention of claim 6, following effect is provided also.
< effect>produces gas in catalyst case efficient improves.
Because catalyst component is supported on the flame arrest material 57, when liquid fuel 6 passed through the flame arrest material 57 of catalyst cases 51 fronts, catalytic combustions took place in partially liq fuel 6, thereby produced the heat of preheated liquid fuel 6.This has accelerated the gasification of liquid fuel 6, and the homogeneous mixture of air and fuel is incorporated into catalyst case 51, thereby makes the efficient that produces gas in the catalyst case 51 high.
(invention of claim 8)
Except by the effect that any one defined invention in the claim 4 to 7 produced, following effect is provided also.
< effect>can begin to produce the operation of gas rapidly.
Like Fig. 2 (A) illustrated, when making glow plug 45 heat releases, the heat of this glow plug 45 conducts to fuel through gap 53 through heat conduction board 52.Before in catalyst case 51, catalytic combustion occurring, in the absence of catalytic combustion heat, make glow plug 45 heat release when beginning to produce gas, liquid fuel 6 and air 44 through the fuel of catalyst case 51 fronts during through gap 53 by preheating.This gasification that causes liquid fuel 6 is accelerated, and the homogeneous mixture of air and fuel is incorporated in the catalyst case 51, thereby promptly begins to produce gas.
(invention of claim 9)
Except by claim to 1 effect that any one described invention produced in 8, following effect is provided also.
< effect>even EGT is low, it also can make gas fuel burning.
Like Fig. 1 illustrated, the oxidation catalyst 12 that is used to accelerate inflammable gas 7 burnings is arranged between the inlet 2a of inflammable gas outlet 9 and filter 2.Therefore, even waste gas 10 temperature are low, it also can make inflammable gas 7 burnings.
(invention of claim 10)
Except the effect that is produced by the described invention of claim 9, following effect is provided also.
< effect>even EGT is low, it also can make gas fuel burning.
Like Fig. 3 illustrated; Flow to oxidation catalyst 12 in order to make from inflammable gas outlet 9 through the heated inflammable gas 7 of exothermic reaction in the gas generator 3; Oxidation catalyst 12 is filled in the housing 65 that is used for ccontaining oxidation catalyst 12, and makes inflammable gas outlet 9 lead to oxidation catalyst 12.The housing 65 of ccontaining oxidation catalyst has the peripheral wall 66 that is provided with a plurality of exhaust gas entrances 67, and has the terminal part 68 that is provided with waste gas outlet 69.Therefore, can with the waste gas influx that possibly increase the per unit area that reduces each exhaust gas entrance 67 pro rata of total opening area of exhaust gas entrance 67.Because this set, even under the low situation of EGT, the mixture of inflammable gas 7 and waste gas 10 also can be through oxidation catalyst 12, keeps high relatively temperature guaranteeing the activation temperature of oxidation catalyst 12 simultaneously, thereby makes inflammable gas 7 burnings.This ignition heat has increased the temperature of waste gas 10, thereby can make the waste gas fine grained burning at filter 2 places.
(invention of claim 11)
Except the effect that is produced by the defined invention of claim 10, following effect is provided also.
< effect>can alleviate the resistance that waste gas stands when oxidation catalyst.
As shown in Figure 3; In peripheral wall 66 at the housing 65 of ccontaining oxidation catalyst; When terminal part 68 was provided with exhaust gas entrance 67 in parallel with each other, part 70 increased to its terminal part 68 diameter of the peripheral wall 66 of the housing 65 of ccontaining oxidation catalyst progressively from top from the top part 70 of housing 65.Therefore; Can be according to the amount of passing through of waste gas along with the top part 70 from the housing 65 of ccontaining oxidation catalyst increase the channel cross-sectional area of oxidation catalyst 12 progressively near the increase of terminal part 68, and so can reduce the resistance that waste gas 10 runs into through oxidation catalyst 12 time.
(invention of claim 12)
Except by claim to 9 effect that any one described invention produced in 11, following effect is provided also.
< effect>can prevent the damage that oxidation catalyst is suffered when burning.
The catalyzer that will comprise the catalyst component on the metallic carrier that is supported on the netted structure of cube is as oxidation catalyst 12.The flame arrest function of carrier suppresses the flame combustion in the oxidation catalyst 12, thus suffered damage can prevent the oxidation catalyst burning time.
(invention of claim 13)
Except by the effect that any one described invention in the claim 9 to 12 produced, following effect is provided also.
< effect>can make venting gas appliance become compact.
Like Fig. 1 illustrated, oxidation catalyst 12 and at least portion gas generator 3 be arranged in the exhaust inlet pipe 21 of the housing 11 that contains filter, thereby can make the venting gas appliance become compact.
< effect>can reduce the housing that the contains filter size along fore-and-aft direction.
Like Fig. 1 illustrated; When the housing that contains filter 11 axially be regarded as fore-and-aft direction the time; Along radially exhaust inlet pipe 21 being inserted in the waste gas suction chamber 19 of the housing 11 that contains filter; And in exhaust inlet pipe 21, oxidation catalyst 12 is arranged on the waste gas upstream side, and portion gas generator 3 is arranged on exhaust gas downstream side at least.This set can reduce the size of housing 11 front and back that contain filter.
< effect>damaged oxidation catalyst and gas generator hardly.
Like Fig. 1 illustrated, along radially exhaust inlet pipe 21 being inserted in the waste gas suction chamber 19 of the housing that contains filter 11, and with oxidation catalyst 12 and at least portion gas generator 3 be arranged in the exhaust inlet pipe 21.Oxidation catalyst 12 receives wall and the exhaust inlet pipe 21 of the housing 11 that contains filter and the duplicate protection of the wall of portion gas generator 3 at least, thereby damages oxidation catalyst 12 and gas generator 3 hardly.
< effect>is even the waste gas of low temperature also can guarantee the activation temperature of oxidation catalyst.
Like Fig. 1 illustrated, along radially exhaust inlet pipe 21 being inserted in the waste gas suction chamber 19 of the housing that contains filter 11, and oxidation catalyst 12 is arranged in the exhaust inlet pipe 21.Therefore, oxidation catalyst 12 by the wall of exhaust inlet pipe 21 with contain the wall double envelopment of the housing 11 of filter, make the heat dissipation hardly of oxidation catalyst 12.For this reason, even the low waste gas of temperature also can guarantee the activation temperature of oxidation catalyst 12.
< effect>damaged the pipe that is used to draw inflammable gas hardly.
Like Fig. 1 illustrated, along radially exhaust inlet pipe 21 being inserted in the waste gas suction chamber 19 of the housing that contains filter 11, and from upstream side with oxidation catalyst 12 and at least portion gas generator 3 be set in sequence in the exhaust inlet pipe 21 by said.The inflammable gas supply passage 8 of drawing from gas generator 3 in addition, is inserted in the oxidation catalyst 12.Therefore, inflammable gas supply passage 8 receives the wall of the housing 11 that contains filter, the wall of exhaust inlet pipe 21 and the protection of oxidation catalyst 12, damages inflammable gas supply passage 8 thus hardly.
(invention of claim 14)
Except effect, following effect is provided also through invention as claimed in claim 13.
< effect>can make venting gas appliance become compact.
As shown in Figure 1, because exhaust silencer 28 is used as the housing 11 that contains filter, therefore do not need to prepare individually to contain the housing 11 and exhaust silencer 28 of filter, thereby can make venting gas appliance become compact.
(invention of claim 15)
Except the effect by claim to 1 any one described invention in 14 is provided, following effect is provided also.
< effect>can stably obtain the ignition heat of inflammable gas.
(invention of claim 16)
Except through the effect by any one described invention in the claim 1 to 14, following effect is provided also.
< effect>is even the waste gas of low temperature also can make gas fuel burning.
(invention of claim 17)
Except by the given effect of the invention of claim 9, following effect is provided also.
< effect>is even the low waste gas of temperature also can guarantee the activation temperature of oxidation catalyst.
Like Fig. 4 and shown in Figure 7; In order to make the upper reaches that flow to oxidation catalyst 12 through the inflammable gas 7 of the heating of the exothermic reaction in the gas generator 3 from inflammable gas outlet 9; In oxidation catalyst 12 upper reaches, exhaust steam passage 13, form upper reaches oxidation passage 14, thereby make exhaust steam passage 13 form double-barrel structure.Upper reaches oxidation passage 14 ccontaining upstream oxidation catalyst 15; At the upstream side of this upstream oxidation catalyst 15, upper reaches oxidation passage 14 is led in the inflammable gas of gas generator 3 outlet 9.Because this set, the inflammable gas of high temperature is mixing with the part waste gas 10 that in process whole waste gas 10,10 and 10 of exhaust steam passage 13, flows into upper reaches oxidation passage 14, and this mixture gets into upstream oxidation catalyst 15.Therefore; Even waste gas 10 has low temperature, the mixture of inflammable gas 7 and waste gas 10 still flows into upstream oxidation catalyst 15, keeps high relatively temperature simultaneously; Guarantee the activation temperature of upstream oxidation catalyst 15 thus, thereby pass through partly burning combustible gas 7 of upstream oxidation catalyst 15.This ignition heat has increased the temperature of whole waste gas 10,10 and 10, and its inflow places the oxidation catalyst 12 in downstream, guarantees the activation temperature of this oxidation catalyst 12 thus.Therefore, this oxidation catalyst 12 makes remaining inflammable gas 7 burnings, with the temperature of the whole waste gas 10,10 of further increase and 10.This waste gas 10 can make the waste gas fine grained burning at filter 2 places.
Description of drawings
Fig. 1 is the vertical sectional view according to the venting gas appliance that is used for diesel engine of first embodiment of the invention;
Fig. 2 (A), Fig. 2 (B) and Fig. 2 (C) show the substantial section of venting gas appliance shown in Figure 1, and Fig. 2 (A) is the vertical sectional view of gas generator, and Fig. 2 (B) is the plan view of guide plate, and Fig. 2 (C) is the plan view of divider (partition);
Fig. 3 is the vertical sectional view that is used for the oxidation catalyst of venting gas appliance shown in Figure 1 and is arranged near its parts;
Fig. 4 (A) and Fig. 4 (B) show the venting gas appliance that is used for diesel engine according to second embodiment of the invention, and Fig. 4 (A) is the vertical sectional view of previous section, and Fig. 4 (B) is the sectional view along the line B-B among Fig. 4 (A);
Fig. 5 (A) and Fig. 5 (B) show the upstream oxidation catalyst of the venting gas appliance that is used for Fig. 4, and Fig. 5 (A) is the sectional view along the line V-V among Fig. 4 (A), and Fig. 5 (B) is corresponding to the modification of Fig. 5 (A);
Fig. 6 (A) and Fig. 6 (B) are the oxidation catalysts that is used for the venting gas appliance of Fig. 4, and Fig. 6 (A) is the sectional view along the line VI-VI among Fig. 4 (A), and Fig. 6 (B) is corresponding to the modification of Fig. 6 (A); And
Fig. 7 is the vertical sectional view according to the venting gas appliance that is used for diesel engine of third embodiment of the invention.
Embodiment
With reference to accompanying drawing embodiments of the invention are described.Fig. 1 to Fig. 3 shows the venting gas appliance that is used for diesel engine according to first embodiment of the invention.Fig. 4 to Fig. 6 shows the venting gas appliance that is used for diesel engine according to second embodiment of the invention.Fig. 7 shows the venting gas appliance that is used for diesel engine according to third embodiment of the invention.
To summarize the first embodiment of the present invention below.
As shown in Figure 1, liquid fuel 6 is supplied to gas generator 3 from the supply source 5 of liquid fuel 6, and gas generator 3 changes into inflammable gas 7 with liquid fuel 6.Draw the supply passage 8 of inflammable gas 7 from gas generator 3.Supply passage 8 has the inflammable gas outlet 9 that is communicated with the exhaust path 1 at diesel particulate filter 2 upper reaches.The inflammable gas 7 that flows out from inflammable gas outlet 9 burns waste gas 10 with the generation ignition heat, and this ignition heat can the fine grained of combustion residue in the waste gas 10 of filter 2.This venting gas appliance is connected to the waste gas outlet 36 of the exhaust manifold that is used for diesel engine.Diesel particulate filter 2 is commonly called DPF, and has the cellular structure of pottery.On diesel particulate filter 2, be supported with oxidation catalyst.Alternatively, can NOx occlusion catalyzer (occlusion catalyst) be supported on the filter 2.Be used to comprise the housing 11 ccontaining part gas generators 3 of filter 2.
As shown in Figure 1, will be from the fuel of the fuel tank 5a of diesel engine as liquid fuel 6.When liquid fuel 6 was mixed with air 44, air 44 adopted the air of automatic pressure intensifier 39.For this purpose, supply the gap 53 of fuel process to have inlet side, this inlet side is communicated with the fuel tank 5a of diesel engine through the supply passage 46 of liquid fuel 6, and is communicated with pressurized machine 39 through air supply passage 38.
As shown in Figure 1, liquid fuel supply passage 46 is provided with valve for liquid fuel 40, and air supply passage 38 is provided with air valve 41.Valve 40 and 41 is communicated with back pressure sensor 43 through controller 42 respectively.When filter 2 was stopped up by the waste gas fine grained, back pressure increased.Then, based on this increase that back pressure sensor 43 detects, controller 42 is opened valve for liquid fuel 40 and air valve 41, thereby liquid fuel 6 and air 44 are supplied to gas generator 3.In gas generator 3, liquid fuel 6 gasifications are to change into inflammable gas 7 with liquid fuel 6.This inflammable gas 7 supplies to exhaust path 1.Catalyzer 51a in the catalyst case 51 is an oxidation catalyst, and it is oxidized fuel fluid 6 partly, makes the oxidation heat of residual liquid fuel 6 gasifications with generation.The catalyzer that will comprise the platinum catalyst composition on the metallic carrier that is supported on the netted structure of cube is as catalyzer 51a.Particularly, use the carrier of foam metal (metal foam) as catalyzer 51a.This foam metal is the metal porous material with cube netted structure identical with foamed resin (its representative is a sponge), and can obtain through known production method.For example, obtain this foam metal through following steps, that is, with the polyurethane foam of cube net columnar structure as base material; This base material is carried out electricity lead processing; Electroplate this base material then; Through heating this base material being decomposed is removed; And stay metal cuboid reticulated structure.Can use alumina particle or similar metal granule carrier as catalyzer 51a.The ratio of mixture of liquid fuel 6 and air 44, promptly air-fuel ratio (O/C) is set in the scope about 0.6, and promptly 0.4 to 0.8.
Though in the present embodiment, gas generator 3 makes liquid fuel 6 gasification so that liquid fuel 6 is changed into inflammable gas 7, gas generator 3 partly oxidized fuel fluid 6 to convert it into the inflammable gas 7 that comprises carbon monoxide and hydrogen.In this case, use partial oxidation catalyst rather than oxidation catalyst as the catalyzer 51a in the catalyst case 51.The catalyzer that can use the palladium that comprises on the metallic carrier that is supported on the netted structure of cube or rhodium catalyst composition is as partial oxidation catalyst.Alternatively, can use alumina particle or similar metal granule.The ratio of mixture of liquid fuel 6 and air 44, promptly air-fuel ratio (O/C) is set in the scope about 1.3, and promptly 1.0 to 1.6.
Make up gas generator as follows.
Shown in Fig. 2 (A), gas generator 3 is provided with catalyst case 51.For ccontaining catalyzer 51a in catalyst case 51, catalyst case 51 has the top that heat conduction board 52 is set.Upper surface along this heat conduction board 52 forms fuel through gap 53, and liquid fuel 6 is fed into this fuel through gap 53 with air 44.This fuel has by the outer rim of opening through gap 53, so that the fuel outlet 54 that leads to catalyst case 51 to be provided, passes through gap 53 thereby the catalytic combustion heat that will in catalyst case 51, produce conducts to fuel through heat conduction board 52.
Catalyst case makes up as follows.
Shown in Fig. 2 (A), glow plug 45 has the heat release part 45a that protrudes from the intermediate portion of heat conduction board 52 downwards.Metal guide plate 56 is set below heat conduction board 52; And this metal guide plate 56 slopes down to the below of the heat release part 45a of glow plug 45 from the peripheral edge portion 56a that is positioned at fuel outlet 54 belows; Make the liquid fuel 6 that flows out from fuel outlet 54 be directed the peripheral edge portion 56a reception of plate 56, and pass through the heat release part 45a of the guiding of guide plate 56 near glow plug 45.The metal flame arrest material 57 of the netted structure of cube is filled in the space between heat conduction board 52 and the guide plate 56.When glow plug 45 produced heat, the heat that is produced by glow plug 45 conducted to heat conduction board 52 and guide plate 56 through flame arrest material 57.During the catalyzer 51a burning in catalyst case 51, catalytic combustion heat conducts to heat conduction board 52 through guide plate 56 and flame arrest material 57.Glow plug 45 links to each other with controller 42, to produce the heat scheduled time in the incipient stage that produces gas.Foam metal as flame arrest material 57, still also can be used the medium of being processed by stainless steel, be commonly referred to " silk screen (wire mesh) " (agent).
Shown in Fig. 2 (A), guide plate 56 has the lower surface that contacts with catalyst case 51 interior catalyzer 51a.Catalyst component is supported on the flame arrest material 57.When glow plug 45 produced heat, the heat that is produced by glow plug 45 conducted to fuel through gap 53 through heat conduction board 52.Platinum as the oxidation catalyst composition is supported on the flame arrest material 57.Divider 58 is set below guide plate 56, and this divider 58 is divided the inner region of catalyst case 51.Shown in Fig. 2 (B) and Fig. 2 (C), each guide plate 56 and divider 58 are all by opening, so that center hole 56b and center hole 58b to be provided respectively.Around center hole 56b, in outer rim a plurality of periphery holes 56c are set, and around center hole 58b, form a plurality of periphery holes 58c in outer rim with predetermined interval with predetermined interval.When from top observation, each periphery holes 56c and the 58c of guide plate 56 and divider 58 are interlaced with each other, prevent thus directly to be downward through periphery holes 56c and periphery holes 58c from the liquid fuel 6 that fuel outlet 54 flows out according to said sequence.Guide plate 56 and divider 58 are processed by stainless steel.
As shown in Figure 1, the oxidation catalyst 12 that is used to accelerate inflammable gas 7 burnings is arranged between the inlet 2a of inflammable gas outlet 9 and filter 2.Being constructed as follows of oxidation catalyst 12.
As shown in Figure 3; Flowed out to oxidation catalyst 12 by the inflammable gas 7 of exothermic reaction heating from inflammable gas outlet 9 in order to make in gas generator 3; Oxidation catalyst 12 is filled in the housing 65 that is used for ccontaining oxidation catalyst 12, and oxidation catalyst 12 is led in inflammable gas outlet 9.The housing 65 of ccontaining oxidation catalyst has the peripheral wall 66 that is provided with a plurality of exhaust gas entrances 67, and has the terminal part 68 that is formed with waste gas outlet 69.Inflammable gas outlet 9 is provided with a plurality of.These inflammable gas outlets 9 are along the vertically setting abreast of the terminal part 8a of inflammable gas supply passage 8.A plurality of exhaust gas entrances 67 are arranged in the peripheral wall 66 of housing 65 of ccontaining oxidation catalyst.
As shown in Figure 3; When in the peripheral wall 66 at the housing 65 of ccontaining oxidation catalyst from the top part 70 of housing 65 when its terminal part 68 is provided with exhaust gas entrance 67 abreast, part 70 increases to terminal part 68 diameter of the peripheral wall 66 of the housing 65 of ccontaining oxidation catalyst progressively from top.The housing 65 of ccontaining oxidation catalyst forms the truncated cone cup-shaped.The catalyzer that will comprise the catalyst component on the metallic carrier that is supported on the netted structure of cube is as oxidation catalyst 12.With the carrier of foam metal as oxidation catalyst 12.The carrier of catalyzer 12 can use the carrier of being processed and be commonly referred to " silk screen " by stainless steel.
The housing that contains filter has following concrete structure.
As shown in Figure 1, the housing that contains filter 11 that uses tubular is as the housing that contains filter, and its two ends are provided with end wall 17 and 18.This housing 11 that contains filter axially is regarded as fore-and-aft direction.The inlet 2a side of filter 2 is defined as " preceding ", and outlet 2b side is defined as " back ".In the housing that contains filter 11, waste gas suction chamber 19 is arranged at the front of filter 2, and waste gas discharge chamber 20 is arranged on the back of filter 2.Waste gas suction chamber 19 is communicated with exhaust inlet pipe 21, and waste gas discharge chamber 20 is communicated with waste gas steam outlet pipe 22.
Along radially exhaust inlet pipe 21 being inserted in the waste gas suction chamber 19 of the housing 11 that contains filter.Oxidation catalyst 12 is arranged in the exhaust inlet pipe 21 according to said sequence with the upstream side of portion gas generator 3 from waste gas.The inflammable gas supply passage 8 of drawing from gas generator 3 is inserted in the oxidation catalyst 12.
Use exhaust silencer 28 as the housing 11 that contains filter.Waste gas suction chamber 19 is made up of first expansion chamber 29, and waste gas discharge chamber 20 constitutes through final expansion chamber 30.Exhaust inlet pipe 21 is made up of the waste gas inlet tube 31 of first expansion chamber 29, and waste gas steam outlet pipe 22 is made up of the waste gas fairlead 32 of final expansion chamber 30.
Inflammable gas produces in the following manner and works.
Shown in Fig. 2 (A), when liquid fuel 6 and air 44 were supplied to gas generator 3, liquid fuel 6 and air 44 mixed in through gap 53 at fuel.Liquid fuel 6 changes into fine grained, and this fine grained passes through in the flame arrest material inflow catalyst chambers 51 57 through gap 53 from fuel.The part of liquid fuel 6 oxidized in catalyst case 51 (generation catalytic combustion) becomes high-temperature combustible gas body 7 to produce oxidation (burning) heat through remaining liquid fuel 6 gasifications of this oxidation heat.Shown in Fig. 2 (A), this high-temperature combustible gas body 7 supplies in the oxidation catalyst 12 from inflammable gas supply passage 8.On the other hand, through mixing in the waste gas 10 inflow oxidation catalysts 12 of exhaust path 1 and with high-temperature combustible gas body 7, this mixture is through oxidation catalyst 12.Inflammable gas 7 is comprised in the dioxygen oxidation (burning) in the waste gas 10 of mixing, to produce the oxidation heat (ignition heat) of the waste gas 10 that heating mixes.
As shown in Figure 1, waste gas 10 is as shown in arrow 60 to flow out from oxidation catalyst 12, and further flows out in first expansion chamber 29 from the air outlet hole 47 of waste gas inlet tube 31.Waste gas 10 is as shown in arrow 62 then, gets into filter 2 and process filter 2 from inlet 2a.As shown in arrow 63, the waste gas 10 of process filter 2 flow in the final expansion chamber 30 from the outlet 2b of filter 2.After this, waste gas 10 flows out from the inlet hole 48 inflow exhaust gas fairleads 32 of waste gas fairlead 32 and from waste gas fairlead 32, and is as shown in arrow 64.
Be different from first embodiment like Fig. 4 in the following areas to second embodiment shown in Figure 6.
Shown in Fig. 4 (A), although oxidation catalyst 12 is positioned at the housing 11 that contains filter, oxidation catalyst 12 is arranged on the outside of waste gas inlet tube 31.In order to make the inflammable gas 7 that in gas generator 3, is heated flow to the upstream side of oxidation catalyst 12 from inflammable gas outlet 9 by exothermic reaction; In the exhaust steam passage 13 at oxidation catalyst 12 upper reaches, form upper reaches oxidation passage 14, and this upper reaches oxidation passage 14 forms double-barrel structure.Upper reaches oxidation passage 14 ccontaining upstream oxidation catalyst 15, the upstream side of oxidation passage 14 at the upper reaches, oxidation passage 14 opens wide towards the upper reaches for inflammable gas outlet 9.Exhaust steam passage 13 is exhaust inlet pipes 21.
Upper reaches oxidation passage has the sectional area of following setting.
Shown in Fig. 4 (B), the sectional area of the upper reaches oxidation passage 14 of the exhaust steam passage 13 of double-barrel structure be set at the whole exhaust steam passage 13 that comprises upper reaches oxidation passage 14 sectional area 1/4th (1/4).For function is accelerated in the oxidation that obtains upstream oxidation catalyst 15 definitely, expectation is set at the sectional area of the upper reaches oxidation passage 14 of the exhaust steam passage 13 of double-barrel structure in 1/4 to the 1/2 long-pending scope of the gross section of the exhaust steam passage 13 that comprises upper reaches oxidation passage 14.
Inflammable gas outlet and upper reaches oxidation passage open wide along following direction.
Shown in Fig. 4 (A), the terminal 8a sealing of the inflammable gas fairlead 8 of the direction orientation of edge formation upper reaches oxidation passage 14, and near the formation of the peripheral wall the 8a of terminal opening export 9 with radial oriented a plurality of inflammable gass that the oxidation passage 14 along the upper reaches is provided.In addition, the terminal 14a of upper reaches oxidation passage 14 sealing, and near the peripheral wall the 14a of terminal forms opening is to form along in the radial oriented a plurality of upper reaches oxidation channel outlet 16 of the passage of oxidation catalyst inlet front 4.
Inflammable gas produces by following mode and works.
Shown in Fig. 4 (A), high-temperature combustible gas body 7 is supplied to the upper reaches oxidation passage 14 in the exhaust steam passage 13 from inflammable gas supply passage 8.On the other hand, mixes through the part waste gas 10 inflow upper reaches oxidation passages 14 of the waste gas 10,10 of exhaust steam passage 13 and 10 and with high-temperature combustible gas body 7, this mixture passes through upstream oxidation catalyst 15.The dioxygen oxidation (burning) that contains in the mixed waste gas 10 of inflammable gas 7 is to produce the oxidation heat (ignition heat) of the waste gas 10 that heating mixes.The waste gas 10 of heating is as shown in arrow 35, and oxidation channel outlet 16 flows out from the upper reaches, and mixes with all the other waste gas 10 and 10 that do not flow into upper reaches oxidation passage 14.Mixture is from air outlet hole 47 outflows and through oxidation catalyst 12.Dioxygen oxidation (burning) in the mixed waste gas 10 of inflammable gas 7 by upstream oxidation catalyst 15 oxidations (burning) under residual is to produce oxidation (burning) heat of the waste gas 10 that heating mixes.
Upstream oxidation catalyst constitutes as follows.
Shown in Fig. 5 (A), will comprise the catalyzer that is supported on the catalyst component on the carrier 25 and be used as upstream oxidation catalyst 15, wherein carrier 25 forms through piling up (overlaying) and winding wavy metal plate 23 and flat metal plate 24.Each sheet metal 23 and 24 all is that thickness is the corrosion resistant plate of 0.5mm.Use platinum as catalyst component.Have in upstream oxidation catalyst 15 under the situation of this spline structure, form wide relatively inner catalyst passage 34,, can guarantee that also the inner catalyst passage in the upstream oxidation catalyst 15 has enough sectional areas even therefore the diameter of upper reaches oxidation passage 14 is less.In addition, because carrier 25 itself is resilient, so it can be retained under the situation of not using any bedding and padding in the upper reaches oxidation passage 14.
Shown in Fig. 5 (B), for upstream oxidation catalyst 15, can use to comprise the catalyzer that is supported on the catalyst component on the carrier of processing by wire netting 26 27.This wire netting 26 is processed and is commonly called " silk screen " by stainless steel.Use platinum as catalyst component.Can obtain equally, in this case and Fig. 5 (A) identical functions.
Oxidation catalyst constitutes as follows.
Shown in Fig. 6 (A), use to comprise the catalyzer that is supported on the catalyst component on the carrier 25 as oxidation catalyst 12, wherein carrier 25 is through piling up and twining wavy metal plate 23 and flat metal plate 24 forms.Each sheet metal 23 and 24 all is that thickness is the corrosion resistant plate of 0.5mm.Use platinum as catalyst component.Have at oxidation catalyst 12 under the situation of this spline structure, form wide relatively inner catalyst passage 34, guarantee that therefore the inner catalyst passage in the oxidation catalyst 12 has enough sectional areas.In addition, because carrier 25 itself is resilient, so it can be retained under the situation of not using any bedding and padding in the housing 11 that contains filter.
Shown in Fig. 6 (B), for oxidation catalyst 12, can use to comprise the catalyzer that is supported on the catalyst component on the carrier of processing by wire netting 26 27.This wire netting 26 is processed and is commonly called " silk screen " by stainless steel.Use platinum as catalyst component.Can obtain equally, in this case and Fig. 6 (A) identical functions.
Except other 26S Proteasome Structure and Functions, second embodiment is identical with first embodiment.In Fig. 4 to Fig. 6, represent with identical reference character among components identical use and Fig. 1 to Fig. 3 among first embodiment.
The 3rd embodiment shown in Fig. 7 is different from first embodiment in the following areas.
The carrier of catalyzer 51a in the catalyst case 51 uses alumina particle.Oxidation catalyst 12 is contained in upstream oxidation catalyst 15 and contains between the catalyst case 51 of the gas generator 3 in the exhaust inlet pipe 21 of housing 11 of filter.Inflammable gas extraction channel 8 extends through oxidation catalyst 12.Except other 26S Proteasome Structure and Functions, the 3rd embodiment is identical with second embodiment.In Fig. 7, represent with identical reference character among second embodiment and first embodiment's components identical use and Fig. 4 and Fig. 1 to Fig. 3.
Claims (16)
1. venting gas appliance that is used for diesel engine; This venting gas appliance is supplied to gas generator (3) with liquid fuel (6) from the supply source (5) of this liquid fuel (6); This gas generator (3) changes into inflammable gas (7) with this liquid fuel (6), and draws an inflammable gas supply passage (8) from this gas generator (3), and this inflammable gas supply passage (8) has the inflammable gas outlet (9) that is communicated with the exhaust path (1) at a diesel particulate filter (2) upper reaches; The inflammable gas (7) that flows out from this inflammable gas outlet (9) burns waste gas (10); Can the fine grain ignition heat of combustion residue in the waste gas (10) that this filter (2) is located to produce, wherein
Be used to comprise the ccontaining part at least of housing (11) this gas generator (3) of this filter (2),
When this gas generator (3) is provided with catalyst case (51), and in this catalyst case (51) during ccontaining catalyzer (51a),
On the top of this catalyst case (51) heat conduction board (52) is set; And the upper surface along this heat conduction board (52) forms fuel through gap (53); This liquid fuel (6) and air (44) are supplied to this fuel through gap (53); And this fuel has by the outer rim of opening so that the fuel outlet that leads to this catalyst case (51) (54) to be provided through gap (53), and
The catalytic combustion heat that in this catalyst case (51), produces conducts to this fuel through gap (53) through this heat conduction board (52).
2. the venting gas appliance that is used for diesel engine according to claim 1, wherein,
Will be from the fuel of the fuel tank (5a) of diesel engine as this liquid fuel (6), and when air (44) was mixed in this liquid fuel (6), the air of automatic pressure intensifier (39) was used as this air (44) in the future.
3. the venting gas appliance that is used for diesel engine according to claim 1 and 2, wherein,
This heat conduction board (52) has intermediate portion; The heat release part (45a) of glow plug (45) is protruded downwards from this intermediate portion; And metal guide plate (56) is set in the below of this heat conduction board (52); This guide plate (56) slopes down to the below of the heat release part (45a) of this glow plug (45) from the peripheral edge portion (56a) that is positioned at this fuel outlet (54) below; Peripheral edge portion (56a) through this guide plate (56) receives the liquid fuel (6) that flows out from this fuel outlet (54) thus, guiding this liquid fuel (6) through this guide plate (56), thereby near this heat release of this glow plug (45) partly (45a).
4. the venting gas appliance that is used for diesel engine according to claim 3, wherein,
Fill the metal flame arrest material (57) of the netted structure of cube in the space between this heat conduction board (52) and this guide plate (56), flame combustion occurs to be suppressed between this heat conduction board (52) and this guide plate (56),
When this glow plug (45) produced heat, the heat that is produced by this glow plug (45) conducted to this heat conduction board (52) and this guide plate (56) through this flame arrest material (57), and
During the catalytic combustion in this catalyst case (51), the catalytic combustion heat that is produced conducts to this heat conduction board (52) through this guide plate (56) and this flame arrest material (57).
5. the venting gas appliance that is used for diesel engine according to claim 4, wherein,
This guide plate (56) has the lower surface that contacts with interior this catalyzer (51a) of this catalyst case (51).
6. the venting gas appliance that is used for diesel engine according to claim 4, wherein,
Go up the support catalyst composition at this flame arrest material (57).
7. the venting gas appliance that is used for diesel engine according to claim 3, wherein,
When this glow plug (45) produced heat, the heat that is produced by this glow plug (45) conducted to this fuel through gap (53) through this heat conduction board (52).
8. the venting gas appliance that is used for diesel engine according to claim 1 and 2, wherein,
Between the inlet (2a) of this inflammable gas outlet (9) and this filter (2), be provided for accelerating the oxidation catalyst (12) of this inflammable gas (7) burning.
9. the venting gas appliance that is used for diesel engine according to claim 8, wherein,
Flow to this oxidation catalyst (12) by the inflammable gas (7) of exothermic reaction heating from this inflammable gas outlet (9) in order to make in this gas generator (3),
This oxidation catalyst (12) is filled in the housing (65) of ccontaining oxidation catalyst; And this oxidation catalyst (12) is led in this inflammable gas outlet (9), and the housing of this ccontaining oxidation catalyst (65) has the peripheral wall (66) that is provided with a plurality of exhaust gas entrances (67) and has the terminal part (68) that is provided with waste gas outlet (69).
10. the venting gas appliance that is used for diesel engine according to claim 9, wherein,
When in the peripheral wall (66) at the housing (65) of this ccontaining oxidation catalyst from the top part (70) of this housing (65) when its terminal part (68) is provided with said exhaust gas entrance (67) abreast,
The diameter of the peripheral wall (66) of the housing of this ccontaining oxidation catalyst (65) increases to this terminal part (68) from this top part (70) progressively.
11. the venting gas appliance that is used for diesel engine according to claim 8, wherein,
The catalyzer that will comprise the catalyst component on the metallic carrier that is supported on the netted structure of cube is as this oxidation catalyst (12).
12. the venting gas appliance that is used for diesel engine according to claim 8, wherein,
Use two ends to have end wall (17; 18) tubular contains the housing (11) of filter, with this contain filter housing (11) axially regard fore-and-aft direction as, inlet (2a) side of this filter (2) is defined as " preceding "; Outlet (2b) side is defined as " back "; In this contains the housing (11) of filter, in the front of this filter (2) waste gas suction chamber (19) is set, and waste gas discharge chamber (20) is set in the back of this filter (2); Exhaust inlet pipe (21) is communicated with this waste gas suction chamber (19) and waste gas steam outlet pipe (22) is communicated with this waste gas discharge chamber (20), and
This exhaust inlet pipe (21) contains radially being inserted in this waste gas suction chamber (19) of housing (11) of filter along this; In this exhaust inlet pipe (21); This oxidation catalyst (12) is arranged on the waste gas upstream side, and this gas generator of part (3) is arranged on exhaust gas downstream side at least
The inflammable gas supply passage (8) of drawing from this gas generator (3) is inserted in this oxidation catalyst (12).
13. the venting gas appliance that is used for diesel engine according to claim 12, wherein,
Exhaust silencer (28) is made up of first expansion chamber (29) as this housing (11) and this waste gas suction chamber (19) that contains filter; This waste gas discharge chamber (20) is made up of final expansion chamber (30); This exhaust inlet pipe (21) is made up of the waste gas inlet tube (31) of this first expansion chamber (29), and this waste gas steam outlet pipe (22) is made up of the waste gas fairlead (32) of this final expansion chamber (30).
14. the venting gas appliance that is used for diesel engine according to claim 1 and 2, wherein,
This gas generator (3) this liquid fuel (6) that gasifies is to change into this inflammable gas (7) with this liquid fuel (6).
15. the venting gas appliance that is used for diesel engine according to claim 1 and 2, wherein,
This gas generator (3) this liquid fuel of partial oxidation (6) is to change into this liquid fuel (6) inflammable gas (7) that comprises carbon monoxide and hydrogen.
16. the venting gas appliance that is used for diesel engine according to claim 8, wherein,
Exported upstream side that (9) flow to this oxidation catalyst (12) by the inflammable gas (7) of exothermic reaction heating from this inflammable gas in order to make in this gas generator (3),
In an exhaust steam passage (13), the upper reaches of this oxidation catalyst (12) form upper reaches oxidation passage (14), this exhaust steam passage (13) forms double-barrel structure, and in this upper reaches oxidation passage (14) ccontaining upstream oxidation catalyst (15); Upstream side in this upstream oxidation catalyst (15), this upper reaches oxidation passage (14) is led in this inflammable gas outlet (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100862982A CN101265823B (en) | 2007-03-13 | 2007-03-13 | Exhausting equipment for diesel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100862982A CN101265823B (en) | 2007-03-13 | 2007-03-13 | Exhausting equipment for diesel |
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| Publication Number | Publication Date |
|---|---|
| CN101265823A CN101265823A (en) | 2008-09-17 |
| CN101265823B true CN101265823B (en) | 2012-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007100862982A Expired - Fee Related CN101265823B (en) | 2007-03-13 | 2007-03-13 | Exhausting equipment for diesel |
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| KR101867540B1 (en) * | 2018-04-03 | 2018-06-15 | 화이버텍(주) | Apparatus for reducing exhaust gas |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5826428A (en) * | 1995-02-09 | 1998-10-27 | J. Eberspacher Gmbh & Co. | Burner for the thermal regeneration of a particle filter in an exhaust gas aftertreatment system of an internal combustion engine, especially a diesel engine |
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- 2007-03-13 CN CN2007100862982A patent/CN101265823B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5826428A (en) * | 1995-02-09 | 1998-10-27 | J. Eberspacher Gmbh & Co. | Burner for the thermal regeneration of a particle filter in an exhaust gas aftertreatment system of an internal combustion engine, especially a diesel engine |
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