EP0197555A2 - Générateur de vapeur - Google Patents
Générateur de vapeur Download PDFInfo
- Publication number
- EP0197555A2 EP0197555A2 EP86104859A EP86104859A EP0197555A2 EP 0197555 A2 EP0197555 A2 EP 0197555A2 EP 86104859 A EP86104859 A EP 86104859A EP 86104859 A EP86104859 A EP 86104859A EP 0197555 A2 EP0197555 A2 EP 0197555A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- reaction chamber
- water
- steam generator
- chamber
- steam
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/003—Methods of steam generation characterised by form of heating method using combustion of hydrogen with oxygen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/04—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass by drop in pressure of high-pressure hot water within pressure-reducing chambers, e.g. in accumulators
Definitions
- the invention relates to a method for generating water vapor in a steam generator, in which hydrogen and oxygen are allowed to react to water vapor in a hot gas reaction chamber, in which water is heated in the wall of the hot gas reaction chamber and in which the heated water is injected into the hot reaction gases.
- the invention relates to a steam generator for performing this method with a hot gas reaction chamber through which a substantially stoichiometric mixture of hydrogen and oxygen can flow, which reacts to water vapor in the reaction chamber, and with cooling channels for water in the wall of the reaction chamber, which than Throttle acting injection ports with the reaction chamber communicates.
- a steam generator in which the water supplied is fed in practically under the same pressure that prevails in the reaction space (DE-OS 2 426 872).
- the cooling water is heated and evaporated in an outer shell surrounding the reaction chamber and flows as pure Water vapor through an inner shell directly adjacent to the reaction space to the injection openings. Effective cooling of the reaction space cannot be achieved since only vaporous water flows directly adjacent to the reaction space.
- Both described steam generators are large devices with which steam at very high temperatures is generated at high pressure. They are only suitable for this purpose, but cannot be used for steam generators of small dimensions, for example for steam generators in the order of 15 cm in length and for low pressures in the order of 2 to 15 bar.
- German patent 29 33 932 on such a small steam generator, it would not be possible to achieve complete evaporation of the water supplied, since the liquid injected water would not have sufficient contact space with the hot fuel gases for evaporation.
- the steam generator of German Offenlegungsschrift 24 26 872 could also not be used for such a purpose, since the vaporous flow around the reaction space could not provide sufficient cooling for the walls of the reaction space.
- the object of the invention is a generic method to train for the generation of water vapor so that even in the smallest space with high efficiency steam of high homogeneity can be provided in a short time.
- This object is achieved according to the invention in a method of the type described in the introduction in that the pressure of the water before the injection is increased as much as the pressure in the hot gas reaction chamber in order to increase the boiling point of the water and in that the water throughput is chosen so that that the water is still at least partially in a liquid state when it is injected, but is so strongly heated that it spontaneously evaporates when it enters the reaction chamber due to the relaxation that occurs.
- the water to be evaporated is at least partially in a liquid state up to the injection point, so that effective cooling of the wall of the reaction chamber is ensured, while on the other hand so much energy is supplied to the water up to the injection opening has been that it evaporates spontaneously when relaxing in the area of the injection opening.
- This can be achieved on the one hand by increasing the boiling point of the water in the supply channels to the injection openings by increasing the pressure, and on the other hand by the appropriately adapted choice of water throughput.
- the water to be supplied is heated up to the boiling temperature prevailing in the supply channels due to the increased pressure, in other words if there is a two-phase mixture in which some of the water is present evaporated and partially still liquid.
- the boiling temperature drops in accordance with the relaxation, so that the liquid portion is then superheated and evaporates spontaneously.
- reaction gases are passed through a constriction after the water-steam mixture has been injected, thereby increasing their flow rate.
- Such an increase in the flow rate which otherwise already takes place in the area of the injection openings themselves, leads to an increased relative speed between water vapor on the one hand and the liquid water droplets on the other.
- This different flow rate promotes the evaporation process of the water droplets, so that this throttling in the area of the injection openings and a subsequent throttling also promote the homogenization of the steam.
- the constriction also acts as a throttle, so that the flow through. relaxation of the throttle, which can lead, for example, to a halving of the water vapor pressure, spontaneous evaporation of particles that are still liquid.
- the heated water-steam mixture is introduced into a swirl nozzle and released from it in the form of a rotationally symmetrical veil, this veil resulting from the rotational movement of the water-steam mixture in the swirl nozzle.
- This veil can preferably be injected against the direction of flow of the reaction gases, so that the veil lies against the inner wall of the reaction chamber and supports the cooling of this inner wall.
- the invention is also based on the object of designing a generic steam generator in such a way that the homogenization of the steam is promoted in the smallest space and in a short time.
- cooling channels surround the reaction space in a helical shape, which results in a particularly long heating time for the cooling water in the wall of the reaction space.
- the injection openings are directed against the flow direction of the reaction gases in the reaction chamber.
- the injection openings are part of a swirl nozzle into which the cooling channels open so eccentrically that the two-steam-water mixture is set in rotation before being injected into the reaction chamber.
- the injection openings and at least partially the cooling channels are formed by the pores of a porous injection body surrounding the reaction chamber, for example wise through a sintered metal tube.
- I have a particularly space-saving design in an embodiment in which the evaporator chamber is designed as an annular space coaxially surrounding the reaction chamber. As a result, the overall length of the steam generator can be reduced considerably.
- the evaporator chamber comprises an inner annular space which is directly connected to the reaction chamber and an adjoining outer annular space which is likewise arranged coaxially to the reaction chamber and if a flow restriction is arranged between the two annular spaces.
- This narrowing of the flow again serves to impart different flow rates to the vaporous components and the droplet-like components, so that the evaporation of the droplet-like components is promoted.
- the evaporator chamber can be connected to a steam consumer via an outlet with a reduced flow cross section.
- the cross section can be designed in such a way that the pressure of the emerging steam is adapted to the respective requirements.
- the steam generator described can be used particularly advantageously for generating water vapor pulses, such as are used, for example, in the sterilization of the contents of cans. It can be provided that the evaporator chamber has an intermittent closable outlet can be connected to a steam consumer, for example a sterilization station in a canned packaging system.
- the outlet is closed by means of a spring-loaded outlet valve which, when a certain pressure of the water vapor in the evaporator chamber is exceeded, can be moved into the open position against the action of a spring.
- the outlet is provided by means of an outlet valve which can be actuated by an actuator and that a pressure sensor is arranged in the evaporator chamber which, when a certain pressure in the evaporator chamber is exceeded, supplies a control which leads to the opening of the outlet valve.
- the outlet valve can then either remain open for a certain period of time, or it is provided that the valve is closed again via the control when the pressure in the evaporator chamber falls below a certain value.
- the steam generator shown in FIG. 1 comprises a cylindrical, elongated reaction chamber 1 with a closed end wall 2, which has a central inlet opening 3. This is connected to an injection and ignition element, not shown in the drawing, which produces an ignitable hydrogen-oxygen mixture and introduces it into the reaction chamber 1.
- This ignitable gas mixture is ignited in the ignition device (not shown in the drawing), so that it reacts inside the reaction chamber 1 to form highly heated water vapor.
- the reaction product is a stoichiometric gas mixture of pure water vapor.
- axially parallel channels 5 with a small cross section run which are connected to an annular space 7, which is arranged at the upstream end of the reaction chamber 1 and has a water inlet 6.
- These water channels can be discrete channels distributed over the circumference, the channels can also be formed by an annular gap surrounding the reaction chamber, the inner wall and the outer wall of the reaction chamber then being connected to one another via the webs not shown in the drawing.
- the channels 5 open at the downstream end of the reaction chamber into a further annular space 8, from which exits a channel 9 extending obliquely to the longitudinal axis of the reaction chamber, which enters a swirl nozzle 10 in the closed end wall 11 of the reaction chamber 1.
- the swirl nozzle is arranged concentrically with the reaction chamber 1 and has a rotationally symmetrical cavity 12 into which the channel 9 enters so eccentrically that medium flowing through it into the cavity is set in rotation about the longitudinal axis of the swirl nozzle.
- the cavity 12 is connected to the inside of the reaction chamber 1 via a centrally arranged injection opening, so that the water emerging from the cavity 12 is injected into the reaction chamber in the form of a rotationally symmetrical veil 14 in the form of a rotationally symmetrical veil 14, which is injected water applied to the inner wall of the reaction chamber and this additionally cools.
- a cylindrical evaporator chamber 15 which is connected to the reaction chamber through the end wall 11, which surrounds the swirl nozzle 10 and surrounds obliquely outward flow channels 16.
- These flow channels 16 together have a substantially reduced flow, cross section compared to the flow cross section in the reaction chamber 1 , so that the flow rate of the reaction gases (water vapor) and the injected water is increased considerably in them.
- the evaporator chamber which has a considerably enlarged cross-section in relation to the flow channels 16, narrows conically at its downstream end and opens into an outlet 17 which can be connected directly to a consumer, for example a sterilizer, in a manner which cannot be seen from the drawing.
- an ignitable, preferred wise stoichiometric gas mixture of hydrogen and oxygen burned to water vapor in the reaction chamber In the operation of the steam generator, an ignitable, preferred wise stoichiometric gas mixture of hydrogen and oxygen burned to water vapor in the reaction chamber.
- Water passed through the channels 5 cools the wall of the reaction chamber and heats up strongly in the process.
- the throughput of the cooling water and the pressure in the supply channels leading to the injection openings are chosen so that at least some of the water supplied remains in the liquid state, but the heat input from the reaction chamber means that so much energy is supplied to the water that it is at the relaxation in the area of the injection nozzles spontaneously changes to the vapor state without the need for further energy supply from the hot fuel gases.
- a two-phase mixture is thus obtained in the vicinity of the injection openings, which spontaneously changes to the vapor state when it emerges into the reaction chamber.
- the two-phase mixture is injected countercurrently into the hot reaction gases in the reaction chamber, the throttling in the area of the injection openings and the subsequent expansion in the reaction chamber causing large speed differences between water and liquid water emerging in vapor form from the injection openings. These flow differences promote the evaporation of the liquid water. This effect is also ert by the hot reaction gases and the counter-current injection in addition promoted d.
- the mixture of liquid and gaseous water vapor then passes through the flow channels into the evaporator chamber, the narrow cross section of which leads into the flow channel again increase the speed of this two-phase mixture. Due to the subsequent relaxation in the evaporator chamber, large speed differences and spontaneous evaporation of the remaining liquid fraction occur again. In this way, the water is completely evaporated up to the outlet of the evaporator chamber, so that homogeneous water vapor can enter the subsequent consumer.
- This water vapor usually flows critically through the outlet 17 designed as a throttle cross section.
- the temperature of the escaping steam can also be only slightly above the boiling temperature; this temperature can be lower than the temperature of the two-phase mixture injected from the swirl nozzle into the reaction chamber.
- the steam generator described can have very small structural dimensions and is also particularly suitable for the instantaneous provision of hot steam of selectable state on or above the boiling line in a low power range, for example with a power of 1 to 500 kW thermally. With this steam generator, continuous as well as intermittent operation is possible with constant condition but also with changeable steam condition and variable output.
- the channels 5 are arranged for water.
- the channels 5 helically surround the inner wall of the reaction camera 1.
- the outer wall of the reaction chamber can carry a thread, over which a sleeve 21 is slid, which lies tightly against the individual threads and thereby forms a helical channel.
- the two-phase mixture guided and heated through the channels 5 is injected into the reaction chamber 1 via a swirl nozzle 10 against the direction of flow of the reaction gases.
- reaction chamber 1 is surrounded by an annular space 22 which extends over its entire length and is arranged coaxially with the reaction chamber 1. It is connected via radial channels 23 to the downstream end of the reaction chamber 1 which is closed by the end wall 11.
- the annular space 22 is in turn surrounded by another annular space 24, which is also arranged coaxially with the reaction chamber 1.
- another annular space 24 is also arranged coaxially with the reaction chamber 1.
- the inner annular space 22 and the outer annular space 24 are connected to one another via throttle channels 25, which have a flow cross-section that is small compared to the annular spaces.
- the outer annular space 24 also tapers in the region of the conical end wall 11 and opens into the outlet 17, to which a suitable consumer is attached can be closed.
- the inner annulus and the outer annulus form the evaporator chamber, which is thus coaxially placed around the reaction chamber 1 in two shells, so that overall a much smaller overall length of the steam generator compared to the steam generator of Figure 1 is possible. Nevertheless, a complete and uniform evaporation of the liquid water and a homogenization of the steam can take place in the two annular spaces acting as an evaporator chamber, the throttle channels 25 contributing to this homogenization in the manner already described above by generating different flow velocities. Because of the increased pressure compared to the evaporator chamber, the water conducted in the channels 5 can generally also assume a temperature which is above that of the steam to be generated. In this exemplary embodiment, therefore, additional heat is transferred from the overheated water of the channels 5 via the partition wall 21 to the water-steam mixture flowing in the annular space 22, and thus the evaporation of the remaining water portion is promoted.
- FIG. 3 is largely the same as that of FIG. 2, corresponding parts therefore have the same reference numerals.
- This embodiment differs from that of FIG. 2 only in that the annular space 8 connects radially inwardly directed injection openings 26 to the interior of the reaction chamber 1, while the swirl nozzle arranged in the end wall 11 is missing.
- the water from the channels 5 is thus radially into the reaction chamber at the downstream end thereof injected.
- the inner wall 32 of the reaction chamber 1 is constructed from a porous sintered metal tube, so that the channels 5 through the pores in this porous inner wall open directly into the reaction chamber, that is, the pores act as injection openings for the water heated in the channels 5.
- An outlet occurs essentially in the downstream part, in which the water is partially converted into vapor form by increasing the temperature.
- a cooling film is formed along the wall of the emerging steam-water mixture, which protects this wall against excessive heating, absorbs heat and evaporates completely.
- the evaporator chamber connects downstream of the reaction chamber.
- the reaction gases can be throttled in the manner described in FIG. 1; this is not particularly shown in FIG. 4.
- outlet 17 is closed by a spring-loaded poppet valve 40, which is pressed under the action of a compression spring 41 against a valve seat 42 which widens outwards.
- outlet 17 is closed by poppet valve 40.
- the poppet valve 40 can be lifted against the action of the compression spring 41 from the valve seat 42, so that water vapor can pass from the outlet 17 past the poppet valve 40 to laterally arranged outlet openings 43 which lead to a consumer, for example the sterilization system of a canned packaging system.
- the outlet 17 is likewise closed by means of a poppet valve 40 which, however, does not close the outlet in a spring-loaded manner, but rather can be moved between the closed position and the open position by means of an actuating device.
- the actuating device can be, for example, a magnetic coil 44, which is reversed by a controller 45 between the open position and the closed position.
- a pressure sensor 46 is arranged, which is connected to the controller 45 via a control line 47.
- the controller 45 sends a valve-opening signal to the solenoid 44, which then either keeps the valve open for a certain period of time or closes the valve when the pressure detected by the pressure sensor 46 is below a certain threshold has fallen.
- steam pulses can be generated intermittently, the pulse sequence and pulse length of which can be controlled by the steam generation rate, which in turn depends on the supply of the hydrogen-oxygen-fuel mixture and the amount of water injected.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853512947 DE3512947A1 (de) | 1985-04-11 | 1985-04-11 | Verfahren zur erzeugung von wasserdampf und dampferzeuger zur durchfuehrung dieses verfahrens |
| DE3512947 | 1985-04-11 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0197555A2 true EP0197555A2 (fr) | 1986-10-15 |
| EP0197555A3 EP0197555A3 (en) | 1987-09-30 |
| EP0197555B1 EP0197555B1 (fr) | 1990-08-01 |
Family
ID=6267705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86104859A Expired - Lifetime EP0197555B1 (fr) | 1985-04-11 | 1986-04-09 | Générateur de vapeur |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0197555B1 (fr) |
| DE (2) | DE3512947A1 (fr) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0452839A1 (fr) * | 1990-04-19 | 1991-10-23 | Balcke-Dürr AG | Dispositif de production de vapeur en combinant oxygène et hydrogène |
| US6247316B1 (en) | 2000-03-22 | 2001-06-19 | Clean Energy Systems, Inc. | Clean air engines for transportation and other power applications |
| DE102008015915A1 (de) | 2008-03-27 | 2009-10-15 | Giese, Michael, Dr.-Ing. | Motor |
| DE202008018190U1 (de) | 2008-03-27 | 2011-12-15 | Michael Giese | Motor |
| WO2014067519A1 (fr) * | 2012-10-29 | 2014-05-08 | Thyssenkrupp Marine Systems Gmbh | Procédé de production de vapeur d'eau |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6170264B1 (en) | 1997-09-22 | 2001-01-09 | Clean Energy Systems, Inc. | Hydrocarbon combustion power generation system with CO2 sequestration |
| US6622470B2 (en) | 2000-05-12 | 2003-09-23 | Clean Energy Systems, Inc. | Semi-closed brayton cycle gas turbine power systems |
| US6868677B2 (en) | 2001-05-24 | 2005-03-22 | Clean Energy Systems, Inc. | Combined fuel cell and fuel combustion power generation systems |
| DE10243250A1 (de) | 2002-09-17 | 2004-03-25 | Alstom (Switzerland) Ltd. | Verfahren zum Erzeugen von Wasserdampf, insbesondere Reinstwasserdampf sowie Dampferzeuger |
| US7021063B2 (en) | 2003-03-10 | 2006-04-04 | Clean Energy Systems, Inc. | Reheat heat exchanger power generation systems |
| WO2005100754A2 (fr) | 2004-04-16 | 2005-10-27 | Clean Energy Systems, Inc. | Systeme d'alimentation a cycle rankine ferme sans emissions |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE397331A (fr) * | ||||
| FR613951A (fr) * | 1925-08-10 | 1926-12-03 | Perfectionnement aux chaudières à vaporisation rapide | |
| FR662772A (fr) * | 1928-10-22 | 1929-08-12 | Générateur de vapeur | |
| GB333922A (en) * | 1929-04-23 | 1930-08-25 | George Rolfe Stow | Improvements in or relating to steam power plants |
| GB463738A (en) * | 1935-10-22 | 1937-04-06 | Rudolf Arnold Erren | Improvements relating to direct contact steam generators |
| SE7407063L (fr) * | 1973-06-04 | 1974-12-05 | Gcoe Corp | |
| US4211071A (en) * | 1978-05-19 | 1980-07-08 | Vapor Energy, Inc. | Vapor generators |
| DE2933932C2 (de) * | 1979-08-22 | 1982-12-09 | Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5300 Bonn | Dampferzeuger |
| US4390062A (en) * | 1981-01-07 | 1983-06-28 | The United States Of America As Represented By The United States Department Of Energy | Downhole steam generator using low pressure fuel and air supply |
| US4475883A (en) * | 1982-03-04 | 1984-10-09 | Phillips Petroleum Company | Pressure control for steam generator |
-
1985
- 1985-04-11 DE DE19853512947 patent/DE3512947A1/de not_active Withdrawn
-
1986
- 1986-04-09 DE DE8686104859T patent/DE3673046D1/de not_active Expired - Lifetime
- 1986-04-09 EP EP86104859A patent/EP0197555B1/fr not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0452839A1 (fr) * | 1990-04-19 | 1991-10-23 | Balcke-Dürr AG | Dispositif de production de vapeur en combinant oxygène et hydrogène |
| US6247316B1 (en) | 2000-03-22 | 2001-06-19 | Clean Energy Systems, Inc. | Clean air engines for transportation and other power applications |
| DE102008015915A1 (de) | 2008-03-27 | 2009-10-15 | Giese, Michael, Dr.-Ing. | Motor |
| DE202008018190U1 (de) | 2008-03-27 | 2011-12-15 | Michael Giese | Motor |
| WO2014067519A1 (fr) * | 2012-10-29 | 2014-05-08 | Thyssenkrupp Marine Systems Gmbh | Procédé de production de vapeur d'eau |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0197555B1 (fr) | 1990-08-01 |
| DE3673046D1 (de) | 1990-09-06 |
| DE3512947A1 (de) | 1986-10-16 |
| EP0197555A3 (en) | 1987-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0028025B1 (fr) | Procédé et dispositif pour la production de gouttes de liquide microfines | |
| DE2439872A1 (de) | Verfahren und vorrichtung zum erzeugen von wasserstoffreichem gas | |
| EP1570211A1 (fr) | Procede et dispositif de combustion d un combustible | |
| EP0197555B1 (fr) | Générateur de vapeur | |
| EP0902233A1 (fr) | Buse de pulvérisation par pression combinée | |
| EP0006163B1 (fr) | Procédé et dispositifs pour diriger les gaz de combustion dans une chaudière | |
| DE2808874A1 (de) | Verfahren und vorrichtung zur erzeugung eines heissgasstromes | |
| EP4008955B1 (fr) | Dispositif et procédé d'alimentation en air de combustion et de récirculation des gaz d'échappement pour un brûleur | |
| DE2210773A1 (de) | Verfahren zum Verbrennen von Schwefel und Vorrichtung zur Durchführung des Verfahrens | |
| DE69717165T2 (de) | Verfahren zum betrieb eines zwanglaufdampferzeugers und dampferzeuger zur ausführung des verfahrens | |
| EP3460207B1 (fr) | Unité formant générateur de vapeur pourvue d'une fonction d'électrothermie | |
| EP0256451A1 (fr) | Procédé et dispositif pour la production d'un mélange gazeux inflammable de combustible liquide, de vapeur d'eau et d'air de combustion | |
| DE1242633B (de) | Verfahren zum Anfahren eines Zwangdurchlaufdampferzeugers aus warmem Zustand | |
| DE3201366A1 (de) | Waermebehandlungsofen | |
| DE68909851T2 (de) | Verbrennungsvorrichtung. | |
| DE612230C (de) | Dampferzeugungsanlage | |
| DE69705609T2 (de) | Verfahren und vorrichtung zur erzeugung von heissgas | |
| DE2645278A1 (de) | Verfahren, einrichtung und anlage zur wiedererhitzung eines viskosen fluessigen brennstoffes | |
| WO2020099254A1 (fr) | Procédé et dispositif de combustion par étapes sans flammes | |
| DE2058865A1 (de) | Verfahren und Vorrichtung zum Erzeugen eines kuehlen Gases und schnellen Aufblasen eines aufblasbaren Gegenstandes | |
| DE1931647A1 (de) | Verfahren und Vorrichtung zur Nachverbrennung von mit brennbaren Bestandteilen angereicherter Abluft (oder Abgas) | |
| EP1862733A1 (fr) | Générateur de vapeur rapide | |
| DE561285C (de) | Waermeaustauschvorrichtung fuer Mittel von fluessigen und dampf- bzw. gasfoermigen Aggregatzustaenden | |
| DE2821160C2 (fr) | ||
| DE2826048A1 (de) | Verfahren und vorrichtung zur rauchgasfuehrung innerhalb eines waermekessels |
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 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): BE CH DE FR GB IT LI LU NL SE |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): BE CH DE FR GB IT LI LU NL SE |
|
| 17P | Request for examination filed |
Effective date: 19870926 |
|
| 17Q | First examination report despatched |
Effective date: 19880421 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DEUTSCHE FORSCHUNGSANSTALT FUER LUFT- UND RAUMFAHR |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| ITF | It: translation for a ep patent filed | ||
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE CH DE FR GB IT LI LU NL SE |
|
| REF | Corresponds to: |
Ref document number: 3673046 Country of ref document: DE Date of ref document: 19900906 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
| ET | Fr: translation filed | ||
| ITTA | It: last paid annual fee | ||
| 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 | ||
| EPTA | Lu: last paid annual fee | ||
| EAL | Se: european patent in force in sweden |
Ref document number: 86104859.3 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20000325 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20000403 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20000417 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 20000421 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20000425 Year of fee payment: 15 Ref country code: CH Payment date: 20000425 Year of fee payment: 15 Ref country code: BE Payment date: 20000425 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20000427 Year of fee payment: 15 |
|
| 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: 20010409 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010409 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010410 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 20010430 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010430 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010508 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010508 |
|
| BERE | Be: lapsed |
Owner name: DEUTSCHE FORSCHUNGSANSTALT FUR LUFT- UND RAUMFAHR Effective date: 20010430 |
|
| 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: 20011101 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20010409 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 86104859.3 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20011101 |
|
| 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: 20020201 |
|
| 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: 20050409 |