EP2916073B1 - Brûleur catalytique, notamment pour un chauffage de véhicule - Google Patents

Brûleur catalytique, notamment pour un chauffage de véhicule Download PDF

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Publication number
EP2916073B1
EP2916073B1 EP15154582.9A EP15154582A EP2916073B1 EP 2916073 B1 EP2916073 B1 EP 2916073B1 EP 15154582 A EP15154582 A EP 15154582A EP 2916073 B1 EP2916073 B1 EP 2916073B1
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EP
European Patent Office
Prior art keywords
flow
fuel
combustion
bottom wall
combustion air
Prior art date
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EP15154582.9A
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German (de)
English (en)
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EP2916073A1 (fr
Inventor
Günter Eberspach
Dr. Klaus Beetz
Wolfgang Pfister
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eberspaecher Climate Control Systems GmbH and Co KG
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Eberspaecher Climate Control Systems GmbH and Co KG
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Publication of EP2916073A1 publication Critical patent/EP2916073A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D3/00—Burners using capillary action
    • F23D3/40—Burners using capillary action the capillary action taking place in one or more rigid porous bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
    • F23C13/06—Apparatus in which combustion takes place in the presence of catalytic material in which non-catalytic combustion takes place in addition to catalytic combustion, e.g. downstream of a catalytic element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D5/00—Burners in which liquid fuel evaporates in the combustion space, with or without chemical conversion of evaporated fuel
    • F23D5/12—Details
    • F23D5/123—Inserts promoting evaporation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D5/00—Burners in which liquid fuel evaporates in the combustion space, with or without chemical conversion of evaporated fuel
    • F23D5/12—Details
    • F23D5/126—Catalytic elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/21—Burners specially adapted for a particular use
    • F23D2900/21002—Burners specially adapted for a particular use for use in car heating systems

Definitions

  • the present invention relates to a catalytic burner according to the preamble of claim 1.
  • fuel-powered heaters are used to provide heat as auxiliary heaters or auxiliary heaters.
  • a mixture of fuel and combustion air is ignited and burned.
  • the resulting heat is transferred to a heat transfer medium, for example the air to be introduced in a vehicle interior or the coolant circulating in an engine coolant circuit.
  • catalytic burners In order to meet the increasingly stringent requirements for pollutant emissions, especially in a startup phase of combustion, it is known to use catalytic burners. In these, the combustion of fuel and combustion air is achieved by a process catalytically supported on the surface of catalytic material.
  • a catalytic burner according to the preamble of claim 1 is known from the document WO 2006/074622 A1 known.
  • Another catalytic burner is from the WO 2007/003649 A1 known.
  • the fuel supplied in droplet form through a fuel supply line is introduced into a pot-shaped evaporator. This is open opposite to the flow direction of the combustion air supplied to the combustion air for combustion. Due to the combustion air flowing into the cup-like evaporator, a turbulence arises in the interior of this pot-like evaporator, which leads to the mixing of the combustion air with the fuel which accumulates therein.
  • That so formed mixture of combustion air and fuel exits over an edge region of a peripheral wall of the pot-like evaporator from this and then passes on to a combustion chamber in which a catalyst arrangement with a plurality of successive in the flow direction and can be flowed through by the fuel / combustion air mixture catalyst units for combustion of this fuel / Combustion air mixture is provided.
  • a catalytic burner as defined in claim 1 in particular for vehicle heating, for the catalytically assisted combustion of a fuel / combustion air mixture comprising a mixing chamber, a combustion air supply arrangement for supplying combustion air to the mixing space, a fuel supply arrangement for supplying fuel to the mixing space, downstream of the mixing space a catalyst arrangement with at least one of the fuel / combustion air mixture can flow through the catalyst unit.
  • the Brennstoffzu semiconductoran extract comprises a liquid fuel from a fuel supply line receiving and fuel vapor in the mixing chamber donating porous evaporator assembly.
  • at least one catalyst unit comprises a lattice-type support with catalyst material on its surface.
  • At least one catalyst unit with a lattice-type support and catalyst material on its surface can also improve the catalytically assisted combustion process.
  • a catalyst unit designed in this way it is possible to provide the latticed support in a spatial configuration adapted to the structural conditions in the catalytic burner, possibly to deform it, on the one hand to improve the flow characteristics, and on the other hand to provide the catalytically assisted combustion surface such catalyst unit can be increased.
  • the peripheral wall and / or the bottom wall of the burner housing at the same time also assume the functionality of supporting at least part of the porous evaporator arrangement.
  • a burner housing bounded by a peripheral wall at least one catalyst unit containing combustion chamber, wherein on a bottom wall of the burner housing an approach with a Circumferential wall and an offset to the bottom wall of the burner housing in the direction of a longitudinal axis arranged bottom wall is provided, wherein at least a portion of the porous evaporator assembly is supported on the peripheral wall and / or the bottom wall of the neck.
  • the inner volume region of the approach as a mixing chamber or at least a portion of the mixing chamber, it is proposed that in the peripheral wall of the approach at least one leading to the combustion chamber flow opening is provided and that at least a portion of the porous evaporator assembly on the peripheral wall and / or the bottom wall the approach is provided on a side facing away from the combustion chamber side.
  • the passage of fuel and combustion air from the mixing chamber to a downstream region, in which the catalyst assembly is arranged, can be ensured that at least one flow opening is provided in a region of the peripheral wall of the approach approaching the bottom wall of the approach and / or in that at least one through-flow opening is provided in a region of the circumferential wall of the neck close to the bottom wall of the burner housing.
  • At least one, preferably each flow opening in the peripheral wall of the approach is covered by a catalyst unit.
  • a non-inventively constructed catalytic burner can be provided that at least a portion of the porous evaporator assembly is provided on one of the peripheral wall of the burner housing side facing the peripheral wall of the neck and that in the peripheral wall of the burner housing in the axial extension region of the neck at least one for Mixing space leading throughflow opening is provided.
  • a volume area between the peripheral wall of the burner housing and the peripheral wall of the neck is used as a mixing chamber. The resulting mixture of fuel and combustion air can then be conveyed in the direction downstream of the catalyst arrangement.
  • a space formed between the peripheral wall of the burner housing and the peripheral wall of the neck at its end remote from the bottom wall of the burner housing end is at least partially limited by a catalyst unit.
  • this catalyst unit essentially limits the mixing space and thus ensures that a first stage of the catalytically assisted combustion can take place directly at the outlet of the fuel / combustion air mixture from the mixing space.
  • At least one flow aperture with at least one through-flow opening is provided on the circumferential wall of the burner housing and that at least one, preferably each throughflow opening of a catalyst unit is covered.
  • the efficiency of the catalytically assisted combustion can be further increased in this non-inventive embodiment in that an axially formed between the approach and a flow diaphragm space is divided by a catalyst unit in a radially outer space area and a radially inner space area.
  • the porous evaporator arrangement is provided on an outer side of the bottom wall facing away from the combustion chamber and that at least one throughflow opening leading to the combustion chamber is provided in the circumferential wall of the burner housing, preferably in a region near the bottom wall.
  • the porous evaporator arrangement is provided on an outer side of the bottom wall facing away from the combustion chamber and that at least one throughflow opening leading to the combustion chamber is provided in the circumferential wall of the burner housing, preferably in a region near the bottom wall.
  • the catalytically assisted combustion can be carried out particularly efficiently if at least one, preferably each flow-through opening is covered by a catalyst unit.
  • the catalyst unit can be provided on an inner side of the peripheral wall of the burner housing facing the combustion chamber, so that large parts of the surface of the catalyst unit face the combustion chamber and can be used for the catalytically assisted reaction.
  • the porous evaporator arrangement is provided on a combustion chamber facing the inside of the bottom wall of the burner housing and that in the peripheral wall of the burner housing, preferably in a region near the bottom wall, at least one leading to the mixing chamber flow opening is provided ,
  • a region of the volume enclosed by the circumferential wall and the bottom wall of the burner housing near the bottom wall of the burner housing forms the mixing space or part of the mixing space, which supports a compact construction.
  • the porous evaporator arrangement which is essentially pot-shaped or cup-shaped and has a circumferential wall area and a bottom wall area, is supported on the circumferential wall. Due to the configuration of the porous evaporator arrangement with pot-like or dish-like configuration, the volume which can be used for distributing the initially liquid-supplied fuel and also the surface which can be used for fuel evaporation is increased. This also supports the efficient mixing of the fuel vapor emitted over a comparatively large surface area with the combustion air flowing around this surface.
  • a catalyst unit be arranged on the porous evaporator arrangement.
  • the catalyst unit comprises catalyst material applied to the building material of the porous evaporator arrangement.
  • the porous material of the evaporator arrangement thus forms the carrier for Catalyst material, so that can be dispensed with an additional carrier here.
  • an efficient support of the combustion by the catalytic reaction can be achieved by providing at least one flow aperture with at least one flow opening on the circumferential wall of the burner housing and at least one, Preferably, each flow-through opening is covered by a catalyst unit.
  • At least one catalyst unit be formed in the direction upstream or downstream, preferably convex, conical or cylindrical.
  • Particularly suitable for this purpose is the construction of a respective catalyst unit with a grid-like support, which can then be deformed to obtain the installation form of the catalyst unit. This deformation can take place before or after the application of catalyst material to the lattice-type support not constructed from catalyst material.
  • a lattice-type support constructed entirely of catalyst material could also be brought into the built-in form by deformation.
  • Such a grid-like carrier constructed entirely of catalyst material also has catalyst material on its surface for the purposes of the present invention.
  • the porous evaporator assembly is associated with an electrically energizable heater.
  • a catalytic burner employable as a heater or heater in a vehicle is generally indicated at 10.
  • the catalytic burner 10 comprises a burner housing 12 elongated in the direction of a longitudinal axis L with a substantially cylindrical peripheral wall 14 and a bottom wall 16.
  • a projection 18 is provided in a central area, which has a circumferential wall 20 which is also substantially cylindrical, for example and a in the direction of the longitudinal axis L to the bottom wall 16 of the burner housing 12 offset bottom wall 22 includes.
  • a mixing space generally designated 24 is provided inside the neck 18.
  • a porous evaporator assembly 28 is provided or supported.
  • This porous evaporator arrangement 28 comprises a disk-like evaporator element 30 constructed of porous material.
  • the evaporator element 30 may be constructed, for example, of nonwoven or braided material, foamed ceramic, metal foam or the like.
  • a fuel supply line extends in the direction of the longitudinal axis L through a volume region lying upstream of the mixing chamber 24 into the mixing chamber 24 or into the evaporator element 30 provided on the bottom wall 22.
  • a fuel pump for example, metering pump, liquid fuel fed into the evaporator element 30. Due to the capillary action of the porous evaporator element 30, the liquid fuel in the internal volume thereof is distributed and evaporated at the side of the evaporator element 30 facing the mixing chamber 24 into the mixing space 24.
  • the volume traversed upstream of the mixing chamber 24 by the fuel supply line 34 forms a combustion air flow space 36.
  • a combustion air flow space 36 Through this combustion air flow space 36, the air to be mixed in the mixing space 24 with the fuel evaporated there is supplied by a combustion air blower.
  • a swirl device 38 can be carried on the bottom wall 16 of the burner housing 12, which ensures swirling of the combustion air introduced into the mixing chamber 24.
  • a non-return valve 40 may be provided which prevents flames resulting in the combustion process from striking back into a further upstream region of the combustion air flow space 36.
  • the fuel / combustion air mixture generated in the mixing chamber 24 passes through a plurality of formed in the peripheral wall 20 of the projection 18, slot-like flow openings 42 in a generally 44th designated combustion chamber of the catalytic burner 10.
  • the flow-through openings 42 are for example elongated in the direction of the longitudinal axis L and adjacent to the bottom wall 22 of the projection 18 at.
  • a catalyst arrangement 46 is arranged in the combustion chamber 44.
  • the catalyst unit 48 is substantially cylindrical and surrounds the peripheral wall 20 of the projection 18 at its the peripheral wall 14 of the burner housing 12 facing the outside.
  • the mixture flowing through the flow openings 42 into the combustion chamber 44 passes through the catalyst unit 48, so that part of the mixture reacts on the surface of the catalyst unit 18 with the catalyst material provided therein or is supported by this catalyst material. Since the catalyst unit 48 is arranged around the projection 18 over the entire circumference, a comparatively large surface area is usable for a catalytically assisted reaction.
  • the mixture passing through the flow-through openings 42 passes, after passing through the catalyst unit 48, into a space 54 formed between the peripheral wall 20 of the projection 18 and the peripheral wall 14 of the burner housing 12, which end region is located in a bottom area of the catalyst unit 50 close to the bottom wall 22 of the projection 18 is axially limited.
  • the catalyst unit 50 may be designed in the manner of an annular disk and be supported on the inner surface of the circumferential wall 14 of the burner housing 12 or / and the bottom wall 22 of the attachment 18 or / and the catalyst unit 48.
  • the mixture entering the space 54 can thus react when flowing through the flow openings 42 or when flowing in the space 54 on the surface of the catalyst unit 48 and can continue to react on leaving the space 54 and thus on passing through the catalyst unit 50 on the surface.
  • a flow screen 56 Farther downstream of the catalyst unit 50, a flow screen 56, for example designed as an annular disc, is carried on the circumferential wall 14 of the burner housing 12. This has, for example, in its central region on a flow-through opening 58, which is covered by the disk-like catalyst unit 52.
  • the downstream of the catalyst unit 50, ie downstream of the space 54, flowing toward the flow orifice 56 and not yet burned on the catalyst units 48, 50 can be burned catalytically supported in a final stage of the catalytic reaction to the catalyst unit 52, so that after the Flow through the three successive in the flow direction of catalyst units 48, 50, 52 is burned substantially all of the fuel combustion air mixture generated in the mixing chamber 24.
  • the catalyst units 48, 50, 52 of the catalyst arrangement 46 can in principle be constructed with a grid-like support, preferably of metal material, which is coated on its surface with catalyst material.
  • a grid-like carrier allows the passage of mixture to be combusted by catalytically assisted reaction, but at the same time is easily brought into the desired installation configuration by deformation.
  • the catalyst unit 48 which has a generally cylindrical configuration, can be bent out of a strip-like blank whose mutually facing end regions can be connected to one another in a suitable manner, for example by material fit or by deformation. Before or after this shaping process, the grid-like carrier can be coated with the catalyst material.
  • the structure of the catalyst units 48, 50, 52 could also be such that the lattice-type support itself is already constructed from catalyst material and thus, of course, also has on its surface catalytic material to support the combustion.
  • a catalytic burner 10 shown on the one hand is characterized by the very efficient mixing of the fuel vapor generated in the porous evaporator arrangement 28 with the combustion air introduced into the mixing chamber 24, and on the other hand by the positioning of the catalyst units 48, 50, 52 at regions with comparatively high flow velocity and strong turbulence of the emerging from the mixing chamber 24 mixture a very efficient combustion process with comparatively low pollutant emissions are guaranteed.
  • a comparatively high flow velocity of the fuel / combustion air mixture or of the combustion exhaust gases occurring in the event of combustion occurring further upstream is ensured, and overheating of the catalyst units is not ensured occurs.
  • the electrically energizable heating device 32 provided in association with the evaporator element 30 of the porous evaporator arrangement 28 ensures efficient fuel evaporation even in the starting phase, so that pollutant emissions can also be reduced in this phase at the beginning of combustion.
  • an ignition device 60 for example glow plug, is provided in the mixing chamber 24, which can assist ignition of the mixture provided in the mixing chamber 24 and therefore already combustion occurring in the mixing chamber 24.
  • the Fig. 2 shows a modified embodiment of the in Fig. 1 shown catalytic burner.
  • Fig. 3 to 5 are components or assemblies, which components described above or modules correspond, denoted by the same reference numerals. It is referring to the Fig. 2 or on the following figures essentially only on existing to previous embodiments existing differences.
  • the evaporator element 30 of the porous evaporator arrangement 28 is supported directly on the inside of the bottom wall 22 of the projection 18 facing the mixing space 24. So here no additional electrically energizable heater is provided.
  • the fuel evaporation can also be achieved by the heat generated by the ignition device 60 or the combustion also taking place in the mixing chamber 24.
  • the bottom wall 22 of the attachment 18 extends radially beyond the circumferential wall 20 of the attachment, so that the space 54 does not only extend through the catalyst unit at its end region facing away from the bottom wall 16 of the burner housing 12 50, but is also limited by a radially projecting part of the bottom wall 22. This leads to a flow throttling or an increase in the flow speed of the mixture flowing out of the mixing chamber 24 into the combustion chamber 44 and there through the catalyst unit 50 and thus to improved heat removal from the region of the catalyst unit 50.
  • a construction of the catalytic burner 10 is shown, in which the mixing chamber 24 is provided substantially in the space 54 formed radially between the peripheral wall 14 of the burner housing 12 and the peripheral wall 20 of the Ansatzes 18.
  • a plurality of flow-through openings 62 are provided distributed in the circumferential direction, through which the air flowing in in the combustion air flow space 36 now enters the mixing space 24 from radially outside.
  • the fuel supply line 34 feeds the liquid supplied fuel through branch lines 64 into the evaporator element 30.
  • the fuel vapor is evaporated from the surface of the evaporator element 30 facing the mixing chamber 24 and mixed in the mixing chamber 24 with the combustion air fed into it.
  • the space 54 in this case the mixing space 24, is axially delimited by a region of the bottom wall 22 of the projection 18 radially projecting beyond the peripheral wall 20 of the projection 18 and the catalyst unit 48 the fuel mixing chamber 24 resulting fuel / combustion air mixture flows through the annular space between the peripheral wall 14 of the burner housing 12 and the bottom wall 22 of the projection 18 and thus passes through the catalyst unit 48 into the combustion chamber 44.
  • two flow louvers 56, 66 are each provided with a modöffnurig 58, 68 and a catalyst unit covering these 52, 70.
  • the catalyst unit 50 Downstream of the catalyst unit 48, the catalyst unit 50, which now has a substantially cylindrical design, is arranged downstream. This lies in the radial region of the circumferential wall 20 of the projection and divides the space 72 located axially between the bottom wall 22 of the projection 18 and the flow diaphragm 56 into a radially outer space region 74 and a radially inner space region 76.
  • the mixture passing through the catalyst unit 48 Combustion gases produced at the catalyst unit 48 enter the space 72 and the radially outer space 74, respectively, and flow radially inwards through the substantially cylindrical catalyst unit 50 so as to enter the central area and thus the area of the flow opening 58 in the flow aperture 56 arrive. Thereby, an additional stage of the catalytic reaction in the region between the upstream flow orifice 56 and the exit from the mixing chamber 24 is achieved, in particular in a region of comparatively high flow velocity.
  • the heating of the evaporator element can be achieved by heat transfer.
  • an electrically energizable heating device could also be provided in this embodiment at the side remote from the mixing chamber 24 back of the evaporator element 30.
  • the burner housing 12a is formed without recognizable in the figures described above approach.
  • the peripheral wall 14a and the Bottom wall 16a define the combustion chamber 44a. Upstream of this combustion chamber 44a, bounded by a further housing portion 78a of the burner housing 12a, the mixing space 24a is formed.
  • the fuel / combustion air mixture generated in the mixing chamber 24a passes into the combustion chamber 44a.
  • the catalyst unit 48a which is essentially cylindrical in shape, is provided on the inner side of the circumferential wall 14a facing the combustion chamber 44a, so that a first cylindrically shaped catalyst unit 48a is provided on entry into the combustion chamber 44a first stage of the catalytic reaction can take place.
  • This is followed by the first flow orifice 56a with the catalyst unit 58a provided thereon and the second flow orifice 66a with the catalyst unit 70a provided thereon.
  • the porous evaporator arrangement 28a or its porous evaporator element 30a is carried on the side facing away from the combustion chamber 44a and the mixing chamber 24a facing side of the bottom wall 16a of the burner housing 12a.
  • the evaporator element 30a can be heated by the combustion heat generated in the combustion chamber 44a.
  • an electrically energizable heating device could also be provided here between the evaporator element 30a and the bottom wall 16a.
  • the evaporator element 30a is substantially planar, disk-like and advantageously covers the entire outside of the bottom wall 16a.
  • the Fig. 7 shows a modification of the in Fig. 6 illustrated construction, with not inventively arranged evaporator.
  • the evaporator element 30a of the porous evaporator arrangement 28a is provided on the side of the bottom wall 16a of the burner housing 12a facing the combustion chamber 44a.
  • the throughflow openings 80a provided near the bottom wall 16a in the peripheral wall 14a of the burner housing 12a pass over the combustion air flow space 36a supplied combustion air into the mixing chamber 24a, which is limited in this embodiment variant of the peripheral wall 14a and the bottom wall 16a of the burner housing 12a and the first flow restrictor 56a in the flow direction.
  • the fuel / combustion air mixture produced in the mixing chamber 24a can pass through the flow-through opening 58a in the flow diaphragm 56a and thus the catalyst unit 52a into the combustion chamber 44a.
  • an electrically energizable heater could be provided for heating or for additional heating of the evaporator element 30a between this and the bottom wall 16a of the burner housing 12a.
  • an electrically energizable heater could be provided for heating or for additional heating of the evaporator element 30a between this and the bottom wall 16a of the burner housing 12a.
  • Fig. 8 is a variation of the in Fig. 7 shown embodiment of the catalytic burner 10a shown, with not inventively arranged evaporator.
  • the two catalyst units 52a, 70a carried on the flow orifices 56a, 66a are no longer in a planar configuration but in a curved configuration.
  • the curvature here is oriented upstream.
  • the surface area of the catalyst units 52a, 70a can be significantly increased while the size of the flow-through openings 58a, 68a is otherwise unchanged, which increases the efficiency of the catalytically assisted combustion.
  • the flow-through openings 58a, 68a provided in the flow orifices 56a, 66a can have mutually different sizes. Accordingly, the two catalyst units 52a, 70a are dimensioned differently from each other.
  • the catalyst units supported on the flow orifices may be provided with such curvature and the surface enlargement generated thereby.
  • This embodiment is particularly easy to achieve, if, as stated above, the catalyst units are constructed with a lattice-like support, preferably of metal material, constructed before or after the application of the catalyst material, or possibly even from catalyst material, by forming into the desired Installation configuration can be brought.
  • a lattice-like support preferably of metal material, constructed before or after the application of the catalyst material, or possibly even from catalyst material, by forming into the desired Installation configuration can be brought.
  • other shapes such as a conical or a cylindrical shape of the catalyst units are possible.
  • buckling in the downstream direction is possible while maintaining the principle of enlarging the surface usable for the catalytic reaction.
  • the Fig. 9 shows a further modification of the catalytic burner 10a, with non-inventively arranged evaporator.
  • a plurality of flow-through openings 58, 58a ' are provided in the mixing chamber 24a axially delimiting flow aperture 56a.
  • These are eccentric to the longitudinal axis L and can be provided, for example, in a ring-like pattern about the longitudinal axis L at the same distance and / or each other the same or different size.
  • a catalyst unit 52a, 52a' is provided in association with each flow-through opening 58a, 58a '. These can, as previously with reference to the Fig. 8 set out to be bulged here towards the mixing chamber 24a.
  • web elements 82a, 82a' constructed of metal material, for example, provide enhanced heat transfer from the catalyst units 52, 52a to the evaporator element 30a and thus the fuel evaporation from the evaporator element 30a support.
  • these web elements 82, 82a ' may be provided independently of the shaping and also of the number or positioning of the catalyst units 52a, 52a'. It should also be pointed out that, of course, a different number of throughflow openings and catalyst units assigned to them can also be provided in the case of the flow orifices of the other embodiments. In particular, a centrally, ie concentrically to the longitudinal axis L concentric flow opening and surrounding a plurality of eccentrically positioned flow openings could be provided.
  • the further housing portion 78b of the burner housing 12 forms substantially the mixing chamber 24b upstream of the peripheral wall 14b or the bottom wall 16b of the burner housing 12b which acts as a flow diaphragm 56b.
  • the porous evaporator arrangement 28b provided with cup-shaped shaping is carried by a plurality of webs 84b, 84b '. This comprises a circumferential wall region 86b and a bottom wall region 88b which is formed integrally therewith, for example, and which is positioned axially opposite the bottom wall 16b of the evaporator housing 12b.
  • the fuel supply line 36b ends in a nozzle area 90b, which is designed, for example, in the manner of a Venturi tube, already in front of the porous evaporator arrangement 28b.
  • the fuel discharged from the fuel supply pipe 36b in a liquid form, for example, in a droplet shape, is passed through a portion of the combustion air supplied in the combustion air flow space 36b through the nozzle portion 90b toward the Interior promoted the cup-shaped porous evaporator assembly 28b.
  • the fuel impinges on the inner surface of the porous evaporator assembly 28b is absorbed by the latter and removed on its surface, in particular the outwardly facing surface, by the combustion air flow flowing therealong in vapor form.
  • an electrically energizable heater 32b carried on the outside of the bottom wall portion 28b may be used. Their energization can take place via the webs 84b, 84b ', which carry the electrical insulation of the porous evaporator arrangement 28b.
  • the porous evaporator arrangement can be provided on its surface with catalyst material, for example coated, so that in this area already a first catalyst unit 48b is formed. It can thus be seen here that the volume area which is used on the one hand as mixing space 24b, namely the volume area containing porous porous evaporator arrangement 28b in additional housing section 78b, can also be used partly as combustion chamber or part of combustion chamber 44b.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Spray-Type Burners (AREA)
  • Gas Burners (AREA)
  • Wick-Type Burners And Burners With Porous Materials (AREA)

Claims (9)

  1. Un brûleur catalytique, en particulier pour un chauffage d'un véhicule, pour la combustion soutenue de manière catalytique d'un mélange combustible/air de combustion, comprenant un espace de mélange (24a), un arrangement d'alimentation d'air de combustion (36a) pour délivrer de l'air de combustion à l'espace de mélange (24a), un arrangement d'alimentation de combustible (28a, 34a) pour délivrer du combustible à l'espace de mélange (24a), et un arrangement de catalyseur (46a) avec au moins une unité de catalyseur (48a, 52a, 70a) susceptible d'être parcourue, l'arrangement d'alimentation de combustible (28a, 34a) comprenant un arrangement d'évaporateur poreux (28a) recevant du combustible liquide d'un conduit de combustible (34a) et émettant de la vapeur de combustible dans l'espace de mélange (24a), où un boîtier de brûleur (12a) avec une paroi circonférentielle (14a) définit un espace de combustion (44a) comprenant au moins une unité de catalyseur (52a, 70a), et où au moins une partie de l'arrangement d'évaporateur poreux (28a) est arrangée à la paroi circonférentielle (14a) du boîtier de brûleur (12a) ou/et à une paroi inférieure (16a) du boîtier de brûleur (12a), où l'arrangement de catalyseur (46a) est prévu en aval de l'espace de mélange (24a) et où au moins une moins une unité de catalyseur (48a, 52a, 70a) peut être parcourue par le mélange combustible/air de combustion, où au moins une ouverture de circulation (80a) menant à l'espace de combustion (44a) est prévue dans la paroi circonférentielle (14a) du boîtier de brûleur (12a),
    caractérisé en ce que l'arrangement d'évaporateur poreux (28a) est prévu a un côté extérieur de la paroi inférieure (16a), opposé à l'espace de combustion (44a).
  2. Brûleur catalytique selon la revendication 1,
    caractérisé en ce qu'au moins une, de préférence chaque ouverture de circulation (80a) est couvert par une unité de catalyseur (48a).
  3. Brûleur catalytique selon la revendication 2,
    caractérisé en ce que l'unité de catalyseur (48a) est prévue à un côté intérieur de la paroi circonférentielle (14a) du boîtier de brûleur (12a) orienté vers l'espace de combustion (44a).
  4. Brûleur catalytique selon une des revendications 1 à 3,
    caractérisé en ce qu'au moins un diaphragme de circulation (56a, 66a), avec au moins une ouverture de circulation (58a, 68a), est prévu à la paroi circonférentielle (14a) du boîtier de brûleur (12a) et en ce qu'au moins une, de préférence chaque ouverture de circulation (58a, 68a) est couverte par une unité de catalyseur (52a, 70a).
  5. Brûleur catalytique selon une des revendications 1 à 4,
    caractérisé en ce qu'au moins une unité de catalyseur (52a, 70a) est formée dans un sens en amont ou dans un sens en aval, de préférence en forme de courbe, de cône ou de cylindre.
  6. Brûleur catalytique selon une des revendications 1 à 5,
    caractérisé en ce que le support en forme de grille d'au moins une unité de catalyseur (48a, 52a, 70a), est déformé pour obtenir la forme de montage de l'unité de catalyseur (48a, 52a, 70a).
  7. Brûleur catalytique selon une des revendications 1 à 6,
    caractérisé en ce qu'un dispositif de chauffage électriquement excitable est associé à l'arrangement d'évaporateur poreux (28a).
  8. Brûleur catalytique selon une des revendications précédentes,
    caractérisé en ce qu'au moins une unité de catalyseur (48a, 52a, 70a) comprend un support en forme de grille avec du matériau de catalyseur à sa surface.
  9. Brûleur catalytique selon une des revendications précédentes,
    caractérisé en ce que ladite au moins une ouverture de circulation (80a) menant à la chambre de combustion (44a) est prévue dans une région proche de la paroi inférieure (16a).
EP15154582.9A 2013-01-02 2013-12-19 Brûleur catalytique, notamment pour un chauffage de véhicule Active EP2916073B1 (fr)

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DE102013200016.2A DE102013200016A1 (de) 2013-01-02 2013-01-02 Katalytischer Brenner, insbesondere für eine Fahrzeugheizung
EP13198505.3A EP2752620B1 (fr) 2013-01-02 2013-12-19 Brûleur catalytique, notamment pour un chauffage de véhicule

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EP15154581.1A Active EP2916072B1 (fr) 2013-01-02 2013-12-19 Brûleur catalytique, notamment pour un chauffage de véhicule
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CN110594729B (zh) * 2019-09-30 2020-09-29 西安科技大学 一种液体燃料多孔介质燃烧器及使用方法

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Publication number Publication date
PL2916072T3 (pl) 2019-05-31
JP2014132215A (ja) 2014-07-17
CN103912890A (zh) 2014-07-09
EP2916072B1 (fr) 2018-06-13
DE102013200016A1 (de) 2014-07-03
US10359190B2 (en) 2019-07-23
EP2916072A1 (fr) 2015-09-09
RU2013156815A (ru) 2015-06-27
EP2752620A1 (fr) 2014-07-09
PL2930425T3 (pl) 2018-12-31
US20140186782A1 (en) 2014-07-03
CN103912890B (zh) 2017-11-17
EP2930425A1 (fr) 2015-10-14
EP2752620B1 (fr) 2017-07-19
EP2930425B1 (fr) 2018-07-04
PL2752620T3 (pl) 2017-12-29
JP6253404B2 (ja) 2017-12-27
EP2916073A1 (fr) 2015-09-09
RU2573862C2 (ru) 2016-01-27

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