EP1393002A1 - Method and device for low-emission non-catalytic combustion of a liquid fuel - Google Patents
Method and device for low-emission non-catalytic combustion of a liquid fuelInfo
- Publication number
- EP1393002A1 EP1393002A1 EP02745348A EP02745348A EP1393002A1 EP 1393002 A1 EP1393002 A1 EP 1393002A1 EP 02745348 A EP02745348 A EP 02745348A EP 02745348 A EP02745348 A EP 02745348A EP 1393002 A1 EP1393002 A1 EP 1393002A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mixing zone
- combustion
- oxidizing agent
- mixture
- fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- F23C99/00—Subject-matter not provided for in other groups of this subclass
- F23C99/006—Flameless combustion stabilised within a bed of porous heat-resistant material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details
- F23D11/40—Mixing tubes; Burner heads
- F23D11/402—Mixing chambers downstream of the nozzle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details
- F23D11/44—Preheating devices; Vaporising devices
- F23D11/441—Vaporising devices incorporated with burners
-
- 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
- F23C2202/00—Fluegas recirculation
- F23C2202/30—Premixing fluegas with combustion air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2209/00—Safety arrangements
- F23D2209/10—Flame flashback
Definitions
- the invention relates to a method and a device for low-pollutant, non-catalytic combustion of a liquid fuel.
- a burner is known from DE 43 22 109 A in which an ignitable gas / air mixture is guided into a chamber upstream of a pore body.
- the porosity of the pore body is designed in such a way that a flame cannot flash back into the chamber.
- the post-published DE 100 42 479 AI discloses an apparatus and a method for the catalytic oxidation of fuels.
- the fuel and air are fed into a mixing room, which is followed by a catalytic converter. It can e.g. if the catalytic converter is damaged, undesired ignition will occur in the mixing room.
- DE 195 44 417 AI describes a catalytic burner for the combustion of fuel gas, in particular hydrogen.
- DE 196 46 957 AI describes another burner which is suitable for the combustion of liquid fuel.
- a mixture consisting of atomized liquid fuel and air is passed into a porous body.
- the porosity of the porous body is designed such that combustion of the mixture can take place therein.
- the mixture passes through a flame arrester into a further pore body downstream with a Peclet number of> 65 and is burned there.
- the known burner has a relatively low power dynamic, ie it can only be modulated in a narrow power range. During operation, high temperatures occur at the nozzle outlet of the atomizing nozzle. Deposits form there, which counteract a uniform atomization of the liquid fuel. This, in turn, is detrimental to low-pollution combustion.
- the object of the invention is to eliminate the disadvantages of the prior art.
- a method and a device are to be specified which enable combustion that is as residue-free as possible in a wide performance range.
- the aim of the invention is, in particular, to provide a highly modulable burner which enables a particularly low-emission combustion in every power range.
- a method for low-pollutant, non-catalytic combustion of a liquid fuel is provided with the following steps: 1.1 separate introduction of the liquid fuel in a non-ignitable state into a mixing zone,
- the evaporation of the liquid fuel in the mixing zone enables the production of particularly compact burners. This ensures that the fuel produced by evaporation only comes into contact with the oxidizing gas in the mixing zone, so that an ignitable mixture can only form there.
- a method for low-pollutant, non-catalytic combustion of a liquid fuel is provided with the following steps:
- the proposed methods allow low-residue combustion in a wide performance range.
- the separate introduction of the fuel and the gaseous oxidizing agent into a mixing zone enables separate control and regulation of the mass flow of both the gas and the gaseous oxidizing agent. This means that a mixture can be set in any desired power range, which enables low-pollutant combustion.
- fuel is liquid fuel, such as light heating oil and the like. , but also vaporized liquid fuels, e.g. alcohol, gasoline or heating oil vapors, understood.
- fuel also includes mixtures of flammable and non-flammable gases or of non-flammable gases and flammable vapors.
- the process is particularly safe in that the mixing zone is designed such that combustion is not possible within the mixing zone even when the ignition temperature of the mixture has been reached. Even if a pore body, for example filling the combustion zone, is damaged, the mixing zone reliably prevents a flashback in a line supplying the fuel.
- the mixing zone is clearly defined spatially. A homogeneous and complete mixture of the mixture can thus be achieved.
- Both of the solutions according to the invention have in common that the mixture is first formed in the mixing zone and then the mixture is burned in the combustion zone spatially separated from the mixing zone. There is no simultaneous mixing and combustion in the same zone.
- the mixing zone expediently has a Peclet number of less than 65 +/- 25, preferably 65. Because of the definition of the Peclet number and the criteria for the selection of a suitable Peclet number, reference is made to DE 43 22 109 AI, the disclosure content of which is hereby included. The proposed method is particularly safe. The separate and direct introduction of the fuel and the gaseous oxidizing agent into the mixing zone prevents ignition of the same until the mixture has completely formed.
- the mixing zone can be formed from a perforated plate, a first porous element or else a narrow gap. It has proven to be advantageous that the mixture is led into a second porous element forming the combustion zone and is burned in the pore space with the formation of a flame. Such combustion is particularly homogeneous and low in pollutants.
- the perforated plate and / or the first and / or the second porous element can be made of a ceramic.
- the first and / or second porous element can also be formed from an open-pore metal foam, metal mesh or a bed of ceramic bodies, preferably balls.
- the first and the second porous element can be arranged directly adjacent to one another. In this case, direct heat conduction from the second porous element to the first porous element is possible. The resulting heating of the first porous element further contributes to the formation of a particularly homogeneous mixture.
- a non-oxidizing gas can be added during evaporation.
- the ignitability of the vaporized fuel can be reduced in this way.
- the mass flow of the fuel led to the mixing zone and / or the mass flow of the gaseous oxidizing agent are expediently controlled.
- Each of the two mass flows can be controlled separately or regulated depending on a predetermined output or a predetermined pollutant emissions. Such regulation can be automated using microprocessors according to a predetermined program.
- the fuel and / or the gaseous oxidizing agent preheated.
- the exhaust gas formed during the combustion can be the vaporized fuel and / or the gaseous one
- Oxidizing agents are added. This can further reduce pollutant emissions. Besides, it can the performance of a burner operating according to the proposed method can be increased.
- a device for low-pollutant, non-catalytic combustion of a liquid fuel with a mixing zone and a combustion zone downstream of the mixing zone is provided, with the mixing zone being connected to a means for separately introducing the liquid or vaporized fuel in a non-ignitable state and a means for separately introducing a gaseous oxidizing agent, and the mixing zone being designed such that combustion is not possible within the mixing zone even when the ignition temperature of the mixture has been reached.
- the proposed device has extremely high performance dynamics. For example, the power can be varied in the range from 1 kW to 20 kW.
- FIG. 4 schematically shows the function of a fourth device
- Fig. 5 shows schematically the function of a fifth device
- FIG. 6 schematically shows the function of a sixth device.
- a mixer is here e.g. made of a porous ceramic with a Peclet number of less than 65.
- the mixer is open to a firing zone. For the rest, the mixer is surrounded on all sides by a gas-tight housing. The housing lies directly on the surface of the porous ceramic. Connections for a line for supplying fuel and a line for supplying gaseous oxidizing agent, e.g. Air, provided.
- a fan can be switched on in the line for supplying gaseous oxidizing agent.
- the fuel can be expanded into the mixer immediately from the liquid state. It is also possible to supply a mixture formed from the fuel and a non-ignitable gas to the mixer. In the mixer, an ignitable mixture is formed from the fuel and the gaseous oxidizing agent. A combustion of the ignitable mixture in the mixer is due to the selected porosity, i.e. a Peclet number less than 65, not possible. The mixture exits the mixer and is burned in the downstream combustion zone.
- the mass flow of both the gaseous oxidizing agent and the fuel can be regulated separately.
- the burner's output can be modulated in a wide range. be lated. Low-pollutant combustion can also be achieved in any selected power range.
- FIG. 2 shows a burner according to FIG. 1.
- the fuel is produced here by means of a device for evaporating heating oil. It is formed from a non-ignitable 01 vapor.
- the air ratio ⁇ or oil vapor is selected so that there is no ignitability.
- the heating oil used here can be mixed with preheated heating oil E ⁇ I and thus the evaporation can be accelerated.
- the heating oil used can also be preheated, for example, by electrical energy or by the waste heat of the exhaust gases formed during the combustion.
- the gaseous oxidizing agent used for example air, can be preheated with air preheated electrically or by waste gas heat. It is also possible to mix both the liquid fuel used and the gaseous oxidizing agent with exhaust gas and to feed it to the mixer.
- FIG. 3 shows a third variant of a device according to the invention.
- a device for evaporating liquid fuel directly coupled to the mixer.
- Liquid fuel for example light heating oil
- the further porous element is heated by the waste heat from the combustion.
- the liquid fuel is then evaporated from the porous element.
- the gas formed passes into the downstream mixer.
- Gaseous oxidizing agent also passes into the mixer and is passed separately through the device for evaporation.
- the mixture only forms in the mixer.
- 4 shows a fourth variant of a device according to the invention.
- the device is similar to the device shown in FIG. 2.
- Exhaust gas is recirculated here.
- the recirculated exhaust gas is used to evaporate the liquid fuel and to mix the vapor formed and to preheat and mix the gaseous oxidizing agent.
- Liquid fuel e.g. Heating oil
- the steam formed in this way reaches a narrow gap and is mixed there with the gaseous oxidizing agent or air supplied.
- the gap width is chosen so that ignition cannot take place within the gap.
- the premix formed then goes into the mixer, which in turn consists of a porous one
- Element can be formed, which has a Peclet number of less than 65.
- a combustion zone is again provided downstream of the mixer, in which the homogeneous mixture emerging from the mixer is burned.
- Gaseous oxidizing agent e.g. Air
- non-ignitable steam passed separately to a perforated plate.
- the nozzles of the supply lines for fuel and gaseous oxidizing agent are arranged in such a way that ignition cannot take place upstream of the mixing zone.
- the mixing zone itself is designed with regard to its hole diameter so that the mixture formed cannot ignite in it either.
- the mixture is burned in a combustion zone downstream of the mixing zones.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Spray-Type Burners (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10127043 | 2001-06-02 | ||
| DE10127043 | 2001-06-02 | ||
| PCT/EP2002/006063 WO2002099334A1 (en) | 2001-06-02 | 2002-06-03 | Method and device for low-emission non-catalytic combustion of a liquid fuel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1393002A1 true EP1393002A1 (en) | 2004-03-03 |
| EP1393002B1 EP1393002B1 (en) | 2006-03-08 |
Family
ID=7687106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02745348A Expired - Lifetime EP1393002B1 (en) | 2001-06-02 | 2002-06-03 | Method and device for low-emission non-catalytic combustion of a liquid fuel |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US6932594B2 (en) |
| EP (1) | EP1393002B1 (en) |
| CN (1) | CN100476294C (en) |
| AT (1) | ATE319964T1 (en) |
| CA (1) | CA2449205C (en) |
| DE (1) | DE50206026D1 (en) |
| ES (1) | ES2260452T3 (en) |
| PL (1) | PL200171B1 (en) |
| WO (1) | WO2002099334A1 (en) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HUE028936T2 (en) | 2002-10-10 | 2017-01-30 | Lpp Comb Llc | System for vaporization of liquid fuels for combustion and method of use |
| US6907866B2 (en) * | 2003-11-11 | 2005-06-21 | Vapor Fuel Technologies, Inc. | Vapor fueled engine |
| US7028675B2 (en) * | 2003-11-11 | 2006-04-18 | Vapor Fuel Technologies, Inc. | Vapor fueled engine |
| US20080032245A1 (en) * | 2003-11-11 | 2008-02-07 | Vapor Fuel Technologies, Llc | Fuel utilization |
| DE102004041815A1 (en) * | 2004-08-30 | 2006-03-09 | Gvp Gesellschaft Zur Vermarktung Der Porenbrennertechnik Mbh | Process and apparatus for the evaporation of liquid fuels |
| DE102004049903B4 (en) | 2004-10-13 | 2008-04-17 | Enerday Gmbh | Burner device with a porous body |
| AU2005314037B2 (en) | 2004-12-08 | 2011-01-20 | Lpp Combustion, Llc | Method and apparatus for conditioning liquid hydrocarbon fuels |
| DE102005001900B4 (en) * | 2005-01-14 | 2010-06-17 | Enerday Gmbh | Apparatus and method for providing a homogeneous mixture of fuel and oxidant |
| US20070095661A1 (en) * | 2005-10-31 | 2007-05-03 | Yi Wang | Method of making, and, analyte sensor |
| US8529646B2 (en) | 2006-05-01 | 2013-09-10 | Lpp Combustion Llc | Integrated system and method for production and vaporization of liquid hydrocarbon fuels for combustion |
| US7631637B2 (en) * | 2006-06-01 | 2009-12-15 | Vapor Fuel Technologies, Llc | System for improving fuel utilization |
| US10041669B2 (en) * | 2006-10-12 | 2018-08-07 | Stonewick, Llc | Catalytic burner |
| CA2702099A1 (en) * | 2006-10-12 | 2008-04-17 | Stonewick, Inc. | Catalytic burner |
| SE530775C2 (en) * | 2007-01-05 | 2008-09-09 | Zemission Ab | Heating device for catalytic combustion of liquid fuels and a stove comprising such a heating device |
| US7717704B2 (en) * | 2007-03-28 | 2010-05-18 | Prince Castle, Inc. | Wire mesh burner plate for a gas oven burner |
| US7800023B2 (en) * | 2007-04-24 | 2010-09-21 | Prince Castle LLC | Conveyor oven with hybrid heating sources |
| US7851727B2 (en) * | 2007-05-16 | 2010-12-14 | Prince Castle LLC | Method of controlling an oven with hybrid heating sources |
| US8684276B2 (en) | 2009-08-20 | 2014-04-01 | Enerco Group, Inc. | Portable catalytic heater |
| US8858223B1 (en) * | 2009-09-22 | 2014-10-14 | Proe Power Systems, Llc | Glycerin fueled afterburning engine |
| TWI450439B (en) * | 2009-10-22 | 2014-08-21 | Atomic Energy Council | A combustion apparatus appliable to high temperature fuel cells |
| US8637792B2 (en) | 2011-05-18 | 2014-01-28 | Prince Castle, LLC | Conveyor oven with adjustable air vents |
| DE102014103817B4 (en) | 2014-03-20 | 2018-07-19 | Webasto SE | Evaporator burner for a mobile liquid fueled heater |
| DE102014103815B4 (en) * | 2014-03-20 | 2018-07-19 | Webasto SE | evaporative burner |
| DE102014103812A1 (en) | 2014-03-20 | 2015-09-24 | Webasto SE | Evaporator burner for a mobile liquid fueled heater |
| DE102014103813A1 (en) | 2014-03-20 | 2015-09-24 | Webasto SE | Evaporator burner assembly for a mobile liquid fueled heater |
| DE102014117115A1 (en) * | 2014-11-23 | 2016-05-25 | Webasto SE | evaporator assembly |
| DE102015226553A1 (en) * | 2015-11-23 | 2017-05-24 | Gvp Gesellschaft Zur Vermarktung Der Porenbrennertechnik Mbh | oven |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE335316C (en) | 1919-02-22 | 1921-03-30 | Fours & Procedes Mathy Sa | Burners for flameless combustion |
| DE2912519C2 (en) * | 1979-03-29 | 1984-03-15 | Kernforschungsanlage Jülich GmbH, 5170 Jülich | Burners for liquid fuel and combustion air |
| ES2064538T3 (en) * | 1990-06-29 | 1995-02-01 | Wuenning Joachim | PROCEDURE AND DEVICE FOR COMBUSTION OF FUEL IN A COMBUSTION ENCLOSURE. |
| US5165884A (en) * | 1991-07-05 | 1992-11-24 | Thermatrix, Inc. | Method and apparatus for controlled reaction in a reaction matrix |
| JP2520062B2 (en) * | 1991-08-06 | 1996-07-31 | 株式会社ミクニ | Evaporative burner |
| DE4322109C2 (en) | 1993-07-02 | 2001-02-22 | Franz Durst | Burner for a gas / air mixture |
| DE4401799C1 (en) * | 1994-01-22 | 1995-06-14 | Webasto Thermosysteme Gmbh | Evaporator burner for heating appts |
| DE19544417A1 (en) | 1995-11-29 | 1997-06-05 | Bernhard Dipl Ing Dahm | Catalytic burner for hydrocarbon gases |
| US5624252A (en) * | 1995-12-26 | 1997-04-29 | Carrier Corporation | Low no burner |
| DE19646957B4 (en) | 1996-11-13 | 2005-03-17 | Gvp Gesellschaft Zur Vermarktung Der Porenbrennertechnik Mbh | Method and apparatus for burning liquid fuel |
| DE19904489A1 (en) | 1998-02-03 | 1999-09-30 | Vaillant Joh Gmbh & Co | Burner with porous burner insert |
| DE19937921B4 (en) | 1999-08-11 | 2010-08-19 | Alstom | Method and apparatus for vaporizing a liquid fuel for a burner |
| DE19939951C2 (en) * | 1999-08-23 | 2002-10-24 | Sgl Acotec Gmbh | Method for a burner and a corresponding device |
| DE10042479C2 (en) | 2000-08-29 | 2002-10-02 | Aral Ag & Co Kg | Device and method for the catalytic oxidation of fuels |
-
2002
- 2002-06-03 ES ES02745348T patent/ES2260452T3/en not_active Expired - Lifetime
- 2002-06-03 US US10/478,799 patent/US6932594B2/en not_active Expired - Fee Related
- 2002-06-03 EP EP02745348A patent/EP1393002B1/en not_active Expired - Lifetime
- 2002-06-03 CA CA2449205A patent/CA2449205C/en not_active Expired - Fee Related
- 2002-06-03 PL PL364362A patent/PL200171B1/en not_active IP Right Cessation
- 2002-06-03 DE DE50206026T patent/DE50206026D1/en not_active Expired - Lifetime
- 2002-06-03 AT AT02745348T patent/ATE319964T1/en active
- 2002-06-03 CN CNB028151925A patent/CN100476294C/en not_active Expired - Fee Related
- 2002-06-03 WO PCT/EP2002/006063 patent/WO2002099334A1/en not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO02099334A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1539069A (en) | 2004-10-20 |
| ATE319964T1 (en) | 2006-03-15 |
| EP1393002B1 (en) | 2006-03-08 |
| PL200171B1 (en) | 2008-12-31 |
| CA2449205A1 (en) | 2002-12-12 |
| PL364362A1 (en) | 2004-12-13 |
| CN100476294C (en) | 2009-04-08 |
| DE50206026D1 (en) | 2006-05-04 |
| US20040170936A1 (en) | 2004-09-02 |
| WO2002099334A1 (en) | 2002-12-12 |
| US6932594B2 (en) | 2005-08-23 |
| ES2260452T3 (en) | 2006-11-01 |
| CA2449205C (en) | 2010-05-18 |
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