EP0625255A1 - Water heater. - Google Patents
Water heater.Info
- Publication number
- EP0625255A1 EP0625255A1 EP93902068A EP93902068A EP0625255A1 EP 0625255 A1 EP0625255 A1 EP 0625255A1 EP 93902068 A EP93902068 A EP 93902068A EP 93902068 A EP93902068 A EP 93902068A EP 0625255 A1 EP0625255 A1 EP 0625255A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion
- water heater
- gas
- fluid
- heater according
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000002485 combustion reaction Methods 0.000 claims abstract description 69
- 239000007789 gas Substances 0.000 claims abstract description 55
- 239000012530 fluid Substances 0.000 claims abstract description 39
- 239000000203 mixture Substances 0.000 claims abstract description 36
- 230000003197 catalytic effect Effects 0.000 claims abstract description 8
- 239000003054 catalyst Substances 0.000 claims description 43
- 239000002737 fuel gas Substances 0.000 claims description 31
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000000919 ceramic Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 238000007084 catalytic combustion reaction Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 4
- 150000001335 aliphatic alkanes Chemical class 0.000 claims 1
- 239000002356 single layer Substances 0.000 claims 1
- 239000000567 combustion gas Substances 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000012809 cooling fluid Substances 0.000 description 3
- 239000010763 heavy fuel oil Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000012720 thermal barrier coating Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 206010063493 Premature ageing Diseases 0.000 description 1
- 208000032038 Premature aging Diseases 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000009275 open burning Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
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
- F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/0027—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using fluid fuel
- F24H1/0045—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using fluid fuel with catalytic combustion
Definitions
- the invention relates to a water heater with a gas inlet for a fuel gas / air mixture, an inlet for a fluid to be heated, at least two combustion stages through which the fuel gas / air mixture flows, with catalytic combustion chambers, the at least partially of at least one with the Fluid-filled fluid chamber are surrounded, and with an exhaust gas heat exchanger through which this fluid and with the exhaust gas escaping from the combustion chambers flows in different chambers, the second combustion stage being designed as a monolithic burner.
- Such water heaters are known in heating construction and are used, for example, to heat hot water for apartment heating and to secure the hot water supply for these apartments via possibly a further water-water heat exchanger.
- Known flame burners have the disadvantage that they have a high harmful NO ⁇ emission. From DE 33 32 572 A1 a catalytic burner is known which has a lower pollutant emission.
- This device according to DE 33 32 572 A1 has two separate air feeds that supply primary and secondary air before the first combustion stage or between the first and the second combustion stage. With this separate air supply in the ratio of 60 percent to 40 percent, the heat release is to be guaranteed to 50 percent in each of the two stages.
- this water heater In its catalytic combustion stages, this water heater consists of two identical monolithic burners, which are embedded between two heat exchangers, with metal grids prevent a flashback. Furthermore, an uncoated ceramic body is arranged between this metal grid and the monolithic burner, which is intended to prevent the flashback and open burning outside the actual combustion chamber.
- This device has a number of disadvantages. On the one hand, it requires precise air control to divide the primary and secondary air volumes supplied. Such a control unit with the additional supply lines required complicates the construction of the water heater. With this configuration, gas compositions are achieved which avoid the formation of a critical temperature in the combustion chambers. The arrangement of the ceramic plate and the metal grille does not prevent the flame from operating between the two ceramics with and without a catalyst; on the other hand, there is a sharp increase in the overall pressure drop of the burner.
- the invention has for its object to provide a water heater of the type mentioned, which with a simple structure a higher fuel consumption use permitted with lower pollutant emissions in the exhaust gas.
- the first combustion stage is designed as a catalytic split burner
- the combustion gap flowing through the gas mixture and forming the combustion chamber of the first combustion stage between one with a wall lined with a ceramic layer is limited on the side facing the fluid chamber and a side coated with a catalyst layer
- the gap width is predetermined as a function of the flow rate given by the gas throughput in such a way that the flame flashback rate is lower than the said one Flow rate is.
- Proportion of relevant size can be demonstrated.
- the temperatures of 800 degrees Celsius necessary for a high conversion rate can be maintained and at the same time a rapid heat flow be guaranteed in the fluid to be heated.
- a flashback is effectively prevented in that the gap width is predetermined as a function of the flow rate predetermined by the gas throughput in such a way that the Flame flashback speed is less than the said flow rate.
- FIG. 1 is a schematic sectional side view of a water heater according to a first embodiment of the invention
- Fig. 2 is a schematic sectional side view of a water heater according to a second embodiment of the invention.
- Fig. 3 is a schematic sectional side view of a water heater according to a third embodiment of the invention.
- a water heater is to be understood as a device with which any other fluid can also be heated and which is based on the technical features of a heating device for water.
- the person skilled in the art will therefore consider each medium to be heated View fluid, the use of water, also in mixtures, is a special case.
- heating outputs For a normal hot water supply for a house with several residential units, heating outputs of, for example, 15-30 kilowatts are necessary. These are advantageously made available in individual modules of, for example, 1-5 kilowatts of power, so that the number of modules required for the heating power required can be put together individually.
- Such a module is shown in FIG. 1. Compared to the modules shown in the other figures, it has a higher gas throughput and a higher heating output.
- the module is installed in an essentially cylindrical hollow body 1.
- the fluid to be warmed up for example water, which is provided with the reference symbol 2 in the corresponding chambers, is introduced into the interior of the module via a lower lateral inlet 3 and via a further inlet 3 arranged centrally around the cylinder axis 23.
- the fluid flowing into the outer annular fluid chamber 4 leaves it on the side opposite the inlet 3 via an upper outlet 5.
- the centrally flowing fluid 2 flows in the tube 6 into the module and flows counter-current coaxially in one at its top End covered sleeve 7 around the inlet location again.
- the cooling fluid 2 is heated up by gas which converts.
- This consists of a fuel gas / air mixture which is introduced into the module via inlets 8 arranged on the underside of the module.
- 8 spaces for gas distribution and swirling 9 are provided in the module behind the inlets, in which the gas is mixed homogeneously.
- This Rooms 9 leave the fuel gas / air mixture in each case via openings 10 and enter combustion gaps 11 which adjoin hollow cylindrical tubes 12.
- the hollow cylindrical tubes 12 are preferably made of a metal which is coated on the outside with a catalyst 13.
- the opposite side of the respective combustion gap 11 is formed by a likewise cylindrical fluid chamber wall 30, which is covered with a heat-insulating ceramic layer 1, which lines the walls of the two fluid chambers 4 and 7.
- the gas flowing into the combustion gaps 11 through the opening 10 is converted on the catalytically active surface 13 with the development of heat.
- This heat is transferred via the ceramic layer 14, which acts as a thermal barrier coating, to the fluid 2, which is heated in this way and flows out of the outlet 5 in the coolant circuit.
- the catalyst layer 13 advantageously consists of a noble metal, preferably of platinum or palladium.
- a noble metal preferably of platinum or palladium.
- Other suitable materials are the oxides of some sub-group elements and certain perovskites, e.g. Calcium titanium oxide.
- a direct contact of the fluid chamber wall 30 with the combustion gap 11 and via gas convection with the wall 12 carrying the catalyst layer 13 is preferably avoided since the gas should reach a temperature of preferably 800 degrees Celsius during the reaction and the conversion process only at 350 Degrees Celsius begins.
- the heat insulation layer 14 relative to the fluid chambers 4 and 7 in the embodiments described here consists of a ceramic layer. However, it can also be formed from a gas layer enclosed in a special intermediate chamber.
- the hollow cylinder 12 carrying the catalyst layer 13 is preferably hollow, so that the heat at the start of the catalytic reaction cannot flow into a possible full cylinder serving as a heat store, but rather serves directly to heat the catalyst layer and the gas mixture.
- the resulting heat in thermal equilibrium which leads to temperatures of over 800 degrees Celsius, can be released to the fluid 2 directly and without heating an intermediate store.
- the hollow cylinder 12 consists of a thin metallic tube, with which a uniform heat shade of the catalyst layer 13 can be ensured over almost its entire cylinder surface.
- the speed of the reaction depends in particular on the temperature and the concentration or the partial pressures of the gases involved.
- the temperature at the start of the reaction is approximately 350 degrees Celsius, at least well below 800 degrees Celsius, so that the conversion process cannot proceed at the possible speed. Therefore, the thin metallic tube 12 acts here as a heater, which conducts the heat generated in the central reaction area directly into the lower area, so that there is also an optimal temperature immediately after the start of the reaction.
- the thin metallic tube 12 compensates for the lowering of the temperature due to the decreasing reaction speed by supplying heat from the middle hot area of the catalyst layer 13, so that despite falling partial pressures a satisfactory conversion in the upper end area of the 10 to 20 centimeter long Combustion gap 11 can be reached.
- the gas gap 11 described for combustion has a width which is predetermined at the flow rate given by the gas throughput so that the flame flashback rate given by the type of fuel gas used is smaller than the said flow rate in the forward direction. Because the temperature of the gas mixture is greater than its self-ignition temperature, so that a flashback and the formation of a stable flame can be prevented.
- the gas emerging from the upper openings 15 of the combustion gaps 11 of the first combustion stage 16 of the catalytic burner still contains approximately 10 to 30 percent fuel gas. This is freely distributed in the air gap 17 so that it can penetrate into the pores 18 of the catalyst sponge 19.
- the catalyst sponge 19 consists of a ceramic foam which has a fine-pored structure which is coated with the catalyst material. Such a catalyst structure is referred to as a "monolithic burner" 20.
- the size of the pore material is also selected depending on the desired firing capacity so that the temperature reached does not rise much above said 1000 degrees Celsius, since otherwise the catalyst material could oxidize and / or nitrogen oxides could form.
- the fuel gas is burned without residue in the second combustion stage 20 in such a way that NO ⁇ emissions or fuel gas residues could only be detected with a highly sensitive measuring technique and that their release into the air is harmless.
- the exhaust gas provided with the reference numeral 22 is then brought into connection in an exhaust gas heat exchanger (not shown in the figures) with the cooling fluid 2 flowing out of the outlet 5, so that the heat contained in the exhaust gas can further heat up the cooling fluid 2.
- an exhaust gas heat exchanger not shown in the figures
- a two-stage catalytic burner has thus been described, which is combustion without residues of a fuel gas is permitted, the dimensions to be provided being favorable in terms of their space requirements.
- the length of the first combustion stage 16 has a magnitude of between 10 and 15 centimeters, which is followed by the approximately 3 centimeter deep catalyst sponge 19 after a swirl gap 17 of 1 to 2 centimeters in thickness.
- the second combustion stage 20 is an essentially adiabatic process, that the flow velocities of the first combustion stage 16 are adapted to those of the second combustion stage 20 over the gap widths 11 or pore widths 18, and that the The catalyst areas of the first 16 and second 20 combustion stages are in the correct relationship to one another.
- the two combustion stages 16 and 20 can be inserted into a tube 1 with a constant outer diameter.
- the sponge 19 rests on a lateral inner support ring 32, which at the same time prevents gas from being directly impinged on the outermost edge regions 35 of the sponge 19, so that these regions 35 are not involved in the conversion process and as a thermal barrier coating Act.
- the second combustion stage 20 it is also possible for the second combustion stage 20 to have a larger diameter with respect to the axis 23, so that the surface of the catalyst sponge 19 normal to the axis 23 of the device is increased, the depth of the second combustion stage 20 then reduced accordingly can be provided that the swirl gap 17 is sufficiently deep to allow a lateral distribution of the inflowing residual fuel gas / air mixture without excessive cooling.
- the distribution gap advantageously has a width of less than one to approximately 5 centimeters.
- FIG. 2 shows a second exemplary embodiment of the invention, in which the same features are denoted by the same reference symbols as in the previous figure.
- cold fluid 2 is introduced into the annular fluid chamber 4 with the lower inlet 3 and is led via the upper outlet 5 to the exhaust gas heat exchanger.
- a thermal insulation layer is arranged, which preferably consists of a ceramic tube 14.
- the combustion gap 11 is formed between this ceramic tube 14 and the likewise cylindrical catalyst wall 31 coated with the catalyst.
- the fuel gas is introduced centrally via a hollow tube 25 arranged on the axis 23, which is diverted at an upper end plate 26 into the coaxially arranged catalyst wall tube 31, so that it flows back in countercurrent with respect to the combustion gap 11 and through radially arranged openings 27 at the lower end of the Module reaches the combustion gap 11.
- the fuel gas / air mixture is preheated by heat conduction and possibly heat radiation from the heat generated at the catalyst layer 13, so that it already passes over the combustion gap 11 as it enters the outlet openings 27 have a suitable temperature which favors the reaction.
- the fuel gas / air mixture may have to preheated to the starting temperature of a few hundred degrees Celsius.
- an electrical heating coil 34 is provided which surrounds the feed pipe 25 in the area of the inlet 8 of the gas mixture.
- a thermal sensor not shown in the figure, is provided in the area of the catalytic combustion gap 11 of the first combustion stage 16, with the temperature signal of which the heating coil 34 can be switched on when a cold gas mixture is present and can be switched off when a predetermined gas mixture temperature is reached.
- the annular cooling jacket 4 extends along the first 16 and the second 20 combustion stages.
- the ceramic tube 14 is provided on the fluid chamber wall 30. This then adjoins the inner ring 32 on which a catalyst honeycomb 39 is placed.
- the catalyst web 39 shown with parallel lines consists of a multiplicity of honeycomb-shaped tubes 38 made of ceramic material lying side by side, which are lined with the catalyst material, that is to say, for example platinum.
- the catalyst material that is to say, for example platinum.
- Such a catalyst is also referred to as a "monolithic burner" 20.
- the distance between the individual walls carrying the catalyst material is considerably smaller than the corresponding distances in the combustion gap 11, so that even with the partial pressures low in the fuel gas present, the remaining ones Fuel gas components can be implemented practically without residue.
- edge regions 35 of the catalyst honeycomb 39 of the second combustion stage 20 are covered by the inner ring 32, so that they appear as a heat insulation layer opposite the fluid chamber 4, so that the high temperatures within the central region 21 can also be used at low concentrations of fuel gas.
- FIG. 3 shows a third embodiment of a water heater.
- the same features of this device are identified by the same reference numerals as in FIGS. 1 and 2.
- the device according to FIG. 3 is in particular a further development of the module according to FIG. 2.
- the construction of the countercurrent preheating of the fuel gas / air mixture is constructed analogously and there is also only an annular fluid chamber 4.
- the fluid chamber 4 is only pulled up into the region of the gap 17 with the ceramic tube 14 fastened to its wall 30. It is closed off by a radial perforated plate 36 onto which the catalyst honeycomb 39 is placed, so that the residual fuel gas only acts on the central area 21 of the catalyst honeycomb 39 from the design point of view.
- the outer 35 honeycomb-shaped tubes 38 of the catalyst honeycomb 39 shown with parallel lines, are not acted upon by the gas, since they are closed by the perforated plate 36.
- these tube walls made of ceramic act as thermal insulation with respect to the surrounding pipe 1, so that the high temperatures within the central region 21 can also be used at low concentrations of fuel gas.
- the fuel gas / air mixture 3 can consist of a mixture of air and methane, but another hydrocarbon such as propane or butane can also be used. It is also possible to use alcohols such as methanol or ethanol mixed with air. Nae ⁇ After all, it may be, also in the gas supply from utilities-supplied natural gas that can be burned -free then NO ⁇ .
- Platinum or palladium in particular can be used for the catalyst material, the catalyst materials in the two combustion stages being able to be the same or different.
- a gas-filled chamber or a vacuum chamber can additionally or alternatively be provided as the thermal insulation layer.
- the thickness of the heat insulation layer provided is dimensioned such that, with the gas throughput provided, the predetermined optimum temperature prevails for the fuel gas / air mixture to be converted in the area of the combustion gap 11 and, at the same time, the heat developed further to the fluid to be heated 2 can be delivered.
- the second combustion stages 20 described in FIGS. 1, 2 and -3 which differ in their design of the combustion chamber, can be exchanged with respect to the different first combustion stages 16.
- the chambers shown symmetrical with respect to an axis 23 form a particularly advantageous spatial economical and structurally simple to carry out embodiment.
- any other, for example cuboid, chamber shape can be selected.
- Several inlets and outlets 3, 5 and 8 can also be provided for the different fluids and / or distribution chambers 9.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gas Burners (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4204320 | 1992-02-13 | ||
DE4204320A DE4204320C1 (en) | 1992-02-13 | 1992-02-13 | |
PCT/DE1993/000079 WO1993016335A1 (en) | 1992-02-13 | 1993-01-27 | Water heater |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0625255A1 true EP0625255A1 (en) | 1994-11-23 |
EP0625255B1 EP0625255B1 (en) | 1996-06-12 |
Family
ID=6451638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93902068A Expired - Lifetime EP0625255B1 (en) | 1992-02-13 | 1993-01-27 | Water heater |
Country Status (6)
Country | Link |
---|---|
US (1) | US5464006A (en) |
EP (1) | EP0625255B1 (en) |
JP (1) | JPH07503788A (en) |
AT (1) | ATE139328T1 (en) |
DE (2) | DE4204320C1 (en) |
WO (1) | WO1993016335A1 (en) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4306722C1 (en) * | 1993-03-04 | 1994-03-03 | Buderus Heiztechnik Gmbh | Catalytic gas and air mixture burner - has catalyst-coated combustion gap heat sealed from water space by air gap |
DE4321439A1 (en) * | 1993-03-12 | 1993-12-02 | Heinrich Hunck | Domestic fire and oven firing system - uses reaction chamber lined with catalytic material producing carbon-dioxide and water and preventing secondary reaction with nitrogen in air |
DE4317554C2 (en) * | 1993-05-26 | 1997-03-06 | Fraunhofer Ges Forschung | Water heater |
DE4330130C1 (en) * | 1993-09-06 | 1994-10-20 | Fraunhofer Ges Forschung | Catalytic burner |
DE4408714C1 (en) * | 1994-03-15 | 1995-07-13 | Buderus Heiztechnik Gmbh | Two=stage catalytic gas burner |
EP0671586A1 (en) * | 1994-03-11 | 1995-09-13 | Buderus Heiztechnik GmbH | Catalytic burner |
AT401562B (en) * | 1994-06-06 | 1996-10-25 | Vaillant Gmbh | Heating appliance |
DE19519897A1 (en) | 1994-06-06 | 1995-12-07 | Vaillant Joh Gmbh & Co | Cylindrical radiant burner |
CH690282A5 (en) * | 1994-07-25 | 2000-06-30 | Vaillant Gmbh | Heater with a catalytic burner. |
AT402100B (en) * | 1995-01-23 | 1997-01-27 | Vaillant Gmbh | Heating appliance with a catalytically coated burner |
AT402660B (en) * | 1994-07-25 | 1997-07-25 | Vaillant Gmbh | Heating appliance |
DE4434249A1 (en) | 1994-09-24 | 1996-03-28 | Bosch Gmbh Robert | Water heater with a catalytic burner |
DE19604263A1 (en) | 1996-02-06 | 1997-08-14 | Fraunhofer Ges Forschung | Catalytic burner |
DE19739704B4 (en) * | 1996-09-10 | 2005-06-02 | Vaillant Gmbh | heater |
US5879154A (en) * | 1996-11-18 | 1999-03-09 | Rheem Manufacturing Company | Flame spreader-type fuel burner with lowered NOx emissions |
CN1299457A (en) | 1998-05-13 | 2001-06-13 | 普里马克Feg责任有限公司 | Gas fired booster |
DE19919293C1 (en) | 1999-04-28 | 2000-11-23 | Joachim Wuenning | High temperature gas heater |
RU2166696C1 (en) * | 2000-03-03 | 2001-05-10 | Институт катализа им. Г.К. Борескова СО РАН | Catalytic heating element |
US6872919B2 (en) * | 2000-08-29 | 2005-03-29 | Maytag Corporation | Multi-stage catalyst for a cooking appliance |
CH695793A5 (en) * | 2001-10-01 | 2006-08-31 | Alstom Technology Ltd | Combustion method, in particular for methods of generation of electric power and / or heat. |
US8517717B2 (en) * | 2004-08-13 | 2013-08-27 | Velocys, Inc. | Detonation safety in microchannels |
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 |
CA2846969C (en) * | 2013-03-15 | 2022-08-30 | Luc Laforest | Liquefied fuel combustor with integrated evaporator device and associated method |
CN107110493B (en) | 2014-06-30 | 2018-11-20 | 土耳其科学技术研究理事会 | Mix homogeneous catalysis combustion system |
CN109357391A (en) * | 2018-11-30 | 2019-02-19 | 约伯(宁夏)环保节能科技发展有限公司 | A kind of heat-producing machine and its operating method |
CA3107299A1 (en) | 2020-01-31 | 2021-07-31 | Rinnai America Corporation | Vent attachment for a tankless water heater |
CN114061151A (en) * | 2020-07-27 | 2022-02-18 | 芜湖美的厨卫电器制造有限公司 | Combustor subassembly and gas heater |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3223081A (en) * | 1963-05-24 | 1965-12-14 | Pan American Petroleum Corp | Bottom-hole catalytic heater using heat transfer liquid |
US3804163A (en) * | 1972-06-08 | 1974-04-16 | Sun Oil Co | Catalytic wellbore heater |
FR2313634A2 (en) * | 1975-06-03 | 1976-12-31 | Brulfert Andre | BOILER OR STEAM GENERATOR WITH CATALYTIC HYDROCARBON COMBUSTION |
IT1063699B (en) * | 1975-09-16 | 1985-02-11 | Westinghouse Electric Corp | STARTING METHOD OF A HIGH-POWER GAS TURBINE WITH A CATALYTIC COMBUSTOR |
US4197701A (en) * | 1975-12-29 | 1980-04-15 | Engelhard Minerals & Chemicals Corporation | Method and apparatus for combusting carbonaceous fuel |
US5281131A (en) * | 1983-07-25 | 1994-01-25 | Quantum Group, Inc. | Selective emissive burner |
DE3332572C2 (en) * | 1983-09-09 | 1986-10-30 | Insumma Projektgesellschaft mbH, 8500 Nürnberg | Condensing boiler for hydrocarbons |
CA1303477C (en) * | 1988-06-06 | 1992-06-16 | Yoichiro Ohkubo | Catalytic combustion device |
FR2647882A1 (en) * | 1989-05-30 | 1990-12-07 | Giuntoli Jacques | Boiler comprising at least one water circuit |
CA2015620A1 (en) * | 1990-04-27 | 1991-10-27 | Paul A. Browne | Catalytic heater |
US5211552A (en) * | 1990-08-15 | 1993-05-18 | Alzeta Corporation | Adiabatic surface combustion with excess air |
US5205731A (en) * | 1992-02-18 | 1993-04-27 | Battelle Memorial Institute | Nested-fiber gas burner |
-
1992
- 1992-02-13 DE DE4204320A patent/DE4204320C1/de not_active Expired - Fee Related
-
1993
- 1993-01-27 AT AT93902068T patent/ATE139328T1/en not_active IP Right Cessation
- 1993-01-27 US US08/256,305 patent/US5464006A/en not_active Expired - Fee Related
- 1993-01-27 EP EP93902068A patent/EP0625255B1/en not_active Expired - Lifetime
- 1993-01-27 JP JP5513653A patent/JPH07503788A/en active Pending
- 1993-01-27 WO PCT/DE1993/000079 patent/WO1993016335A1/en active IP Right Grant
- 1993-01-27 DE DE59302924T patent/DE59302924D1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9316335A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4204320C1 (en) | 1993-08-12 |
EP0625255B1 (en) | 1996-06-12 |
ATE139328T1 (en) | 1996-06-15 |
US5464006A (en) | 1995-11-07 |
WO1993016335A1 (en) | 1993-08-19 |
DE59302924D1 (en) | 1996-07-18 |
JPH07503788A (en) | 1995-04-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0625255B1 (en) | Water heater | |
EP0991586B1 (en) | Device for reforming educts containing hydrocarbons | |
DE3780656T2 (en) | BOILER. | |
DE19727841A1 (en) | Method and device for the autothermal reforming of hydrocarbons | |
DE102012023257B4 (en) | Method and device for thermal afterburning of hydrocarbons containing gases | |
DE3914472A1 (en) | PLANT FOR RADIATION HEAT GENERATION | |
DE4317554C2 (en) | Water heater | |
DE60125412T2 (en) | CATALYTIC COMBUSTION DEVICE WITH LIQUID FUEL EVAPORATION ON HOT WALLS | |
DE4222711C2 (en) | Water heater with at least one catalytic burner penetrating a water space | |
DE2717993C2 (en) | Apparatus with a reactor for reforming methanol optionally mixed with water into a gaseous fuel | |
DE2734975A1 (en) | HEAT EXCHANGER SYSTEM WITH HEAT EXCHANGER UNITS ARRANGED IN A COMMON FLUE | |
DE19921420A1 (en) | Primary reformer used in recovery of methanol, ammonia or hydrogen has heating tubes connected to tubular reformer with inner burner or tubular pore burner | |
DE10149329C2 (en) | Integrated recuperative burner | |
DE19604263A1 (en) | Catalytic burner | |
DE19739704B4 (en) | heater | |
WO2016066297A1 (en) | Reformer comprising porous or surface burners | |
EP2597280B1 (en) | Heat exchanger and arrangement of a heat exchanger in an exhaust gas line of an internal combustion engine | |
DE4438356C2 (en) | Method and device for the two-stage combustion of gaseous or vaporous fuel | |
WO2018108321A1 (en) | Heat exchanger having a burner | |
AT404982B (en) | CATALYTIC BURNER | |
AT299490B (en) | Burners for liquid and / or gaseous fuels | |
AT404504B (en) | FULLY PRE-MIXING FAN-SUPPORTED CATALYTIC HEAT GENERATOR | |
DE19724819A1 (en) | Total premix blower-assisted catalyst-coated heater | |
DE19730263A1 (en) | Total premix catalytic burner | |
DE29715120U1 (en) | Water heater |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19940209 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK FR IT LI LU NL SE |
|
17Q | First examination report despatched |
Effective date: 19950927 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK FR IT LI LU NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Effective date: 19960612 |
|
REF | Corresponds to: |
Ref document number: 139328 Country of ref document: AT Date of ref document: 19960615 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 59302924 Country of ref document: DE Date of ref document: 19960718 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
ET | Fr: translation filed | ||
ITF | It: translation for a ep patent filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19960912 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19970127 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19970131 Ref country code: LI Effective date: 19970131 Ref country code: CH Effective date: 19970131 Ref country code: BE Effective date: 19970131 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19990121 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19990128 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19990326 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000801 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000929 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20000801 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001101 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050127 |