DK169109B1 - Waste heat steam generator, - Google Patents
Waste heat steam generator, Download PDFInfo
- Publication number
- DK169109B1 DK169109B1 DK422389A DK422389A DK169109B1 DK 169109 B1 DK169109 B1 DK 169109B1 DK 422389 A DK422389 A DK 422389A DK 422389 A DK422389 A DK 422389A DK 169109 B1 DK169109 B1 DK 169109B1
- Authority
- DK
- Denmark
- Prior art keywords
- drum
- water
- evaporator
- heating surface
- steam
- Prior art date
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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
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
- F22B1/1815—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines using the exhaust gases of gas-turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B29/00—Steam boilers of forced-flow type
- F22B29/04—Steam boilers of forced-flow type of combined-circulation type, i.e. in which convection circulation due to the difference in specific gravity between cold and hot water is promoted by additional measures, e.g. by injecting pressure-water temporarily
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
i DK 169109 B1in DK 169109 B1
Opfindelsen angår en spildvarme-dampgenerator fortrinsvis til indsætning bag en gasturbine under anvendelse af mindst én tromle, der indgår som en del af et naturligt cirkulationssystem med mindst ét faldrør, mindst én for-5 dampervarmeflade i en varmeafgivende røggaskanal og mindst ét stigrør, hvorved stigrøret er forbundet med tromlens damprum via en overløbsforbindelse og/eller er direkte forbundet med tromlen, faldrøret er forbundet med fordampervarmefladen via en underløbsforbindelse, og for-10 dampervarmefladen er anbragt horisontalt.The invention relates to a waste heat steam generator preferably for insertion behind a gas turbine using at least one drum included as part of a natural circulation system with at least one drop pipe, at least one pre-steam heating surface in a heat-emitting flue gas channel and at least one riser pipe, whereby the riser is connected to the drum steam compartment via an overflow connection and / or is directly connected to the drum, the downpipe is connected to the evaporator heating surface via an underflow connection, and the evaporator heating surface is arranged horizontally.
Sædvanligvis bygges spildvarme-dampgeneratorer efter to forskellige konstruktive principper, nemlig med naturlig -eller tvungen cirkulation. Ved naturlig cirkulation er 15 fordamperrørbundterne bygget vertikalt ind i en horison tal røggaskanal og forbundet med mindst én damptromle via faldrør og stigrør. Herved kan overhederens og economise-rens eller eventuelt andre varmefladers varmefladerør indbygges i en vandret og/eller lodret stilling.Generally, waste heat steam generators are built on two different constructive principles, namely with natural or forced circulation. By natural circulation, the 15 evaporator bundles are built vertically into a horizontal flue gas duct and connected to at least one steam drum via drop tubes and risers. In this way, the superficial tube of the superheater and economizer or possibly other heater surfaces can be built into a horizontal and / or vertical position.
2020
Ved tvungen cirkulation er overhederens, fordamperens og economiserens eller eventuelt andre varmefladers varmefladerør bygget horisontalt ind i en vertikal røggaskanal. Fordampervarmefladerne er forbundet med mindst én 25 damptromle via faldrør, cirkulationspumper og stigrør. Cirkulationspumpen, som tjener til at sikre vandcirkulationen i fordamperen, er forbundet med økonomiske og arbejdsmæssige omkostninger ved anlæggets opførelse og udgør desuden en driftforstyrrende faktor.With forced circulation, the superficial pipes of the superheater, evaporator and economizer or possibly other heaters are horizontally built into a vertical flue gas duct. The evaporator heating surfaces are connected to at least one 25 steam drum via drop pipes, circulation pumps and riser pipes. The circulation pump, which serves to ensure water circulation in the evaporator, is associated with the economic and labor costs of the construction of the plant and is also a disruptive factor.
3030
Fra patentskriftet CH-PS 6 333 610 kendes et gas-damptur-binekraftværk, hvor røggasserne fra gasturbinen strømmer op fra neden og opefter i en spildvarmekanal til en dampkedels varmeflade. I dette anlæg pumpes vandet fra en 35 damptromle af en cirkulationspumpe over i en overheder.From the patent CH-PS 6 333 610 a gas-steam turbine power plant is known, in which the flue gases from the gas turbine flow upwards from below and upwards in a waste heat duct to the heating surface of a steam boiler. In this plant, the water from a 35 steam drum of a circulation pump is pumped into a superheater.
Som følge af, at der anvendes en cirkulationspumpe til at sikre en tvungen cirkulation, er anlægget forholdsvis DK 169109 B1 2 pladskrævende og tildels sårbart over for driftforstyrrelser.Due to the use of a circulation pump to ensure a forced circulation, the system is relatively space consuming and partly vulnerable to operational disturbances.
Et anlæg, som er beskrevet i patent skriftet US-PS 4 586 5 338, er behæftet med den samme ulempe. I dette anlæg fin des en fordampervarmeflade med horisontale ribberør.A plant disclosed in U.S. Patent No. 4,586,5338 suffers from the same disadvantage. In this plant there is an evaporator heating surface with horizontal rib pipes.
Fra patentskriftet DE-AS 1 401 317 kendes et dampgenera-toranlæg med naturlig cirkulation. I dette tilfælde er en 10 damp-vandtromle på vandsiden forbundet med en dybere liggende forudskiller via et faldrør, hvorved dette under forudskilleren danner et knæ, der tjener som vandlås og hindrer, at dampbobler fra forudskilleren når ind i fald-rørets vertikalt nedefter forløbende dele.From patent specification DE-AS 1 401 317 a steam generator with natural circulation is known. In this case, a water vapor drum on the water side is connected to a deeper reclining separator via a drop tube, thereby forming a knee below the pre-separator which serves as a water trap and preventing steam bubbles from the pre-separator from reaching the vertically downwardly extending portions of the drop tube. .
15 I røggasrøret findes to dampgeneratorelementer, der består af grupper af parallelt koblede rørslanger, der virker som kogerør og opvarmes af de nedad strømmende gasser. Dampgeneratorelementerne er ved den ene ende til-20 sluttet en fordelerkasse som via en vinkelbøjet forgrening er forbundet med et faldrør til forudskilleren. Ved dette anlæg strømmer de varme gasser i røggasrøret nedefter og modsat strømningen i dampgeneratorelementerne.15 In the flue gas pipe there are two steam generator elements consisting of groups of parallel coupled pipe hoses which act as boiling pipes and heated by the downstream gases. The steam generator elements are connected at one end to a distributor box which is connected via an angled bend to a drop pipe for the pre-separator. At this plant, the hot gases in the flue gas pipe flow downwards and opposite to the flow in the steam generator elements.
25 Det er formålet med opfindelsen at anvise en spildvarme-dampgenerator af den indledningsvis nævnte art, som uden at lide af de kendte konstruktioners ulemper har den fordel, at vandcirkulationen sikres uden anvendelse af en cirkulationspumpe.SUMMARY OF THE INVENTION It is an object of the invention to provide a waste heat steam generator of the kind mentioned above, which, without suffering from the disadvantages of the known structures, has the advantage that the water circulation is ensured without the use of a circulation pump.
3030
Dette opnås, idet spildvarme-dampgeneratoren ifølge opfindelsen er ejendommelig ved, at fordampervarmefladen på kendt måde omstrømmes af gas nedefra og opefter og består af ribberør, hvorved der i stig- eller faldrørssystemet i 35 givet fald er anbragt en indretning til at accelerere vandcirkulationen i startfasen.This is achieved since the waste heat vapor generator according to the invention is characterized in that the evaporator heat surface is in a known manner flowed downwards and upwards and consists of rib pipes, whereby a device for accelerating water circulation in the initial phase is arranged in the required phase. .
DK 169109 B1 3DK 169109 B1 3
Derved sikres, at cirkulationen kommer til at finde sted i rigtig retning, på en enklere måde end ved det anlæg, som er beskrevet i patentskriftet DE-A 1 402 317.This ensures that the circulation takes place in the right direction, in a simpler way than in the plant described in patent specification DE-A 1 402 317.
5 Med henblik på at accelerere vandcirkulationen i startfasen kan faldrørssystemet endvidere ifølge opfindelsen have en injektor, som i startfasen leder ekstra vand ind i faldrørssystemet i strømningsretningen.In addition, in order to accelerate water circulation in the start-up phase, the downpipe system according to the invention may have an injector which in the start-up phase directs extra water into the downpipe system in the flow direction.
10 Accelerationen af vandcirkulationen kan desuden ifølge opfindelsen accelereres ved hjælp af én i stigrørssyste-met anbragt injektor, som leder vandet ind i stigrørssy-stemet i strømningsretningen. Til acceleration af vandcirkulationen i startfasen kan der yderligere ved en an-15 den variant ifølge opfindelsen være anbragt en indretning til at lede damp, en blanding af damp og vand, en gas, såsom nitrogen, eller lignende ind i stigrørssystemet.In addition, the acceleration of the water circulation according to the invention can be accelerated by means of an injector arranged in the riser system which directs the water into the riser system in the flow direction. In order to accelerate the circulation of water in the start-up phase, another device according to the invention may also have a device for conducting steam, a mixture of steam and water, a gas such as nitrogen, or the like, into the riser system.
Endeligt kan der mellem fordampervarmefladens ind- og ud-20 gangssamlebeholdere være anbragt en afspærrelig forbindelsesledning til at accelerere vandcirkulationen i startfasen.Finally, between the evaporator heating surface's inlet and outlet collector bins may be provided a detachable connecting line to accelerate water circulation in the initial phase.
Opfindelsen forklares nærmere nedenfor, idet der beskri-25 ves en eksempelvis udførelsesform for spildvarme-dampge-neratoren under henvisning til tegningens eneste figur, hvor spildvarme-dampgeneratoren ifølge opfindelsen i vertikal 30 opbygning er' forsynet med en fordampervarmeflade 1, en tromle 2, et faldrørssystem 3, et stigrørsystem 4, samt en fødeledning 5 med en fødepumpe 6. Tromlen 2 er på vandsiden tilsluttet faldrørssystemet 3, som via en underløbsforbindelse 29 munder ud i en indgangssamlebehol-35 der 7, som fordampervarmefladen l's rørsystem er tilsluttet. Begrebet "underløbsforbindelse" skal forstås således, at faldrøret 3 er ført nedefter til et plan, der DK 169109 B1 4 ligger dybere end fordampervarmefladen l's indgangssamle-beholder 7, således at vandet strømmer opefter nedefra, før det når ind i samlebeholderen 7. "Underløbsforbindel-sen" kan således opfattes som en slags vandsæk. Fordam-5 pervarmefladen 1 er på udgangssiden tilsluttet en ud-gangssamlebeholder 8, som stigrørssystemet 4 munder ud i. Stigrørssystemet 4 er endvidere forbundet med tromlen 2's damprum 26 via en overløbsforbindelse 9, eller direkte med tromlen 2’s vandrum 11 via et rørsystem 10. Begrebet 10 "overløbsforbindelse" skal forstås således, at damp-vand-blandingen føres ind i tromlen 2 i et niveau, som ligger højere end vandspejlet i tromlen 2.The invention is explained in more detail below, by describing an exemplary embodiment of the waste heat steam generator with reference to the sole figure of the drawing, wherein the waste heat steam generator according to the invention in vertical construction is provided with an evaporator heating surface 1, a drum 2, a drop pipe system 3, a riser system 4, and a feed line 5 with a feed pump 6. The drum 2 is connected on the water side to the drop pipe system 3, which via an inlet connection 29 opens into an inlet collection vessel 7 to which the evaporator heating surface 1's pipe system is connected. The term "underflow connection" is understood to mean that the downpipe 3 is led downward to a plane deeper than the inlet collector 7 of the evaporator heat surface 1 so that the water flows upwards from below before it enters the collecting container 7. "Underflow connection -sen "can thus be seen as a kind of water bag. The evaporator 5 heat exchanger surface 1 is connected to the output side of an outlet collector vessel 8, which the riser system 4 opens. The riser system 4 is further connected to the drum 2's steam room 26 via an overflow connection 9, or directly to the drum 2's water space 11 via a pipe system 10. The term 10 "overflow connection" is understood to mean that the steam-water mixture is introduced into the drum 2 at a level higher than the water level in the drum 2.
Fødepumpen 6 leder til efterfyldning vand fra en føde-15 vandsbeholder eller lignende ind i vandrummet 11 via fø-deledningen 5.The feed pump 6 conducts to replenish water from a feed tank 15 or the like into the water space 11 via the feed line 5.
Til i startfasen at accelerere vandcirkulationen kan der som starthjælp anvendes forskellige systemer: 20To accelerate water circulation in the initial phase, different systems can be used as a starting aid: 20
Ved en første udførelsesform er der i faldrørssystemet 3 anbragt en injektor 12, som er tilsluttet fødeledningen 5 via en ledning 13, som er forsynet med et afspærringsorgan 14, f.eks. en ventil, en hane eller lignende. Ved at 25 lede en del af vandstrømmen i fødeledningen 5 ind i faldrørssystemet 3 i strømningsretningen i dette, sikres det, at vandcirkulationen i startfasen bibringes en dynamisk igangsætningsimpuls.In a first embodiment, an injector 12 is provided in the drop pipe system 3, which is connected to the feed line 5 via a line 13, which is provided with a blocking means 14, e.g. a valve, cock or the like. By directing a portion of the water flow in the feed line 5 into the downpipe system 3 in the flow direction thereof, it ensures that the water circulation in the starting phase is imparted to a dynamic start pulse.
30 Ved en anden udførelsesform er der anbragt en pumpe 16 i en shuntledning 15, som forbinder faldrørssystemet 3 med en injektor 17 i stigrørssystemet 4. Denne pumpe 16 leder kedelvand ind i stigrørssystemet 4 i strømningsretningen i dette, hvorved vandcirkulationen i startfasen bibringes 35 en dynamisk igangsætningsimpuls, som ved at koble pumpen 16 ud atter kan afbrydes, når cirkulationen har nået en stationær tilstand DK 169109 B1 5In another embodiment, a pump 16 is arranged in a shunt line 15 which connects the downpipe system 3 to an injector 17 in the riser system 4. This pump 16 conducts boiler water into the riser system 4 in the flow direction thereof, thereby providing a dynamic flow of water in the initial phase. start-up pulse which can be switched off again by switching off pump 16 when the circulation has reached a steady state DK 169109 B1 5
Inden for opfindelsens ramme består også den mulighed, at ledningen 15 forbindes med ledningen 5, og i dette tilfælde tilføres der fødevand, hvorved pumpen 16 kan udelades. Der kan naturligvis også tages vand fra et hvilket 5 som helst andet system.Within the scope of the invention there is also the possibility that the conduit 15 is connected to the conduit 5, and in this case feed water is supplied, whereby the pump 16 can be omitted. Of course, water can also be taken from any other system.
Ved en tredie udførelsesform kan der blæses damp, nitrogen eller en anden gas ind i stigrørssystemet 4 gennem en ledning 18, hvori der befinder sig et afspærringsorgan 10 19, f.eks. en ventil, en hane eller lignende. Denne for anstaltning forstærker termosyphonvirkningen og sikrer en acceleration af vandcirkulationen i startfasen.In a third embodiment, steam, nitrogen or other gas can be blown into the riser system 4 through a conduit 18 in which there is a shut-off member 10 19, e.g. a valve, cock or the like. This action amplifies the thermosyphon effect and ensures acceleration of water circulation in the initial phase.
Ved en fjerde udførelsesform er der anbragt en ledning 15 22, som kan spærres af ved hjælp af et afspærringsorgan 21, f.eks. en ventil, en hane eller lignende, og som forbinder fordampervarmefladen l's indgangssamlebeholder 7 med udgangssamlebeholderen 8. Indbygningen af en sådan afspærrelig forbindelsesledning 22 mellem mindst én til 20 fordampervarmefladen 1 hørende henholdsvis indgangs- og udgangssamlebeholder 7, 8 sikrer, at vandcirkulationen i startfasen sættes i bevægelse ved at lede de først dannede dampbobler direkte ind i stigrørssystemet 4.In a fourth embodiment, a conduit 15 22 is provided which can be blocked by means of a blocking means 21, e.g. a valve, cock or the like, which connects the evaporator heat sink 1 of the evaporator heater 1 to the outlet heater 8. The incorporation of such a detachable connection line 22 between at least one to 20 evaporator heater surface 1, respectively, of the inlet and outlet collector vessel 7, 8 ensures that the water circulation in the starting phase movement by directing the first formed steam bubbles directly into the riser system 4.
25 Ved passende dimensionering af fordampervarmefladen 1' s rørsystem og henholdsvis fald- og stigrørssystemet 3, 4 kan vandcirkulationens termosyphonvirkning påvirkes fordelagtigt .By appropriate sizing of the evaporator heating surface 1's pipe system and the drop and riser system 3, 4 respectively, the thermosyphon effect of the water circulation can be advantageously affected.
30 Desuden er det fordelagtigt, når der, som antydet i figuren, anvendes ribberør til fordampervarmefladen 1.In addition, as indicated in the figure, it is advantageous to use rib pipes for the evaporator heating surface 1.
På grund af underløbsforbindelsen 29 og fortrinsvis også overløbsforbindelsen 9 og/eller den direkte forbindelse 35 af stigrørssystemet 4 med tromlen 2's vandrum 11 kan de kendte udførelsesformer for røggas-aftrækskanaler til kedler bibeholdes, og der kan gives afkald på at anvende 6 DK 169109 B1 cirkulationspumper i kredsløbet.Because of the underflow connection 29 and preferably also the overflow connection 9 and / or the direct connection 35 of the riser system 4 with the drum 2's water space 11, the known flue gas exhaust duct duct embodiments can be maintained and the use of circulating pumps can be waived. in the circuit.
Med henblik på at anvende spildvarme-dampgeneratoren bagved gasturbiner anbringes fordampervarmef laden 1, som 5 vist, horisontalt i en røggaskanal 23, som røggasserne fra en eller flere gasturbiner strømmer ind i i retning af pilen A, hvorved der ligeledes horisontalt over og/el-ler under fordampervarmefladen 1 kan være anbragt en overhedervarmeflade 24, som på indgangssiden står . i for-10 bindelse med tromlen 2's damprum 26 via en indgangssamle-beholder 30 og en ledning 25, og på udgangssiden fører til turbinen via en udgangssamlebeholder 31 og en ledning 27, som er forsynet med et afspærringsorgan 28.In order to use the waste heat steam generator behind gas turbines, the evaporator heating surface 1, as shown, is arranged horizontally in a flue channel 23 as the flue gases from one or more gas turbines flow in the direction of arrow A, thereby also horizontally over and / or beneath the evaporator heating surface 1 may be arranged a superheat heating surface 24 which is on the inlet side. in conjunction with the steam compartment 26 of the drum 2 via an inlet collector 30 and a conduit 25, and on the output side leads to the turbine via an outlet collector 31 and a conduit 27 provided with a shut-off member 28.
15 20 25 30 3515 20 25 30 35
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT211688 | 1988-08-29 | ||
| AT2116/88A AT392683B (en) | 1988-08-29 | 1988-08-29 | HEAT STEAM GENERATOR |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK422389D0 DK422389D0 (en) | 1989-08-28 |
| DK422389A DK422389A (en) | 1990-03-01 |
| DK169109B1 true DK169109B1 (en) | 1994-08-15 |
Family
ID=3528112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK422389A DK169109B1 (en) | 1988-08-29 | 1989-08-28 | Waste heat steam generator, |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0357590B1 (en) |
| KR (1) | KR0142330B1 (en) |
| CN (1) | CN1018574B (en) |
| AT (1) | AT392683B (en) |
| DE (1) | DE58904955D1 (en) |
| DK (1) | DK169109B1 (en) |
| ES (1) | ES2043114T3 (en) |
| FI (1) | FI93055C (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1005793A3 (en) * | 1992-05-08 | 1994-02-01 | Cockerill Mech Ind Sa | INDUCED CIRCULATION HEAT RECOVERY BOILER. |
| DE4441008A1 (en) * | 1994-11-17 | 1996-05-23 | Siemens Ag | Plant for steam generation according to the natural circulation principle and method for initiating water circulation in such a plant |
| DE19524727C2 (en) * | 1995-07-07 | 1998-04-09 | Nem Bv | Natural heat recovery steam generator |
| DE19534802A1 (en) * | 1995-09-20 | 1997-04-10 | Nem Bv | Heat recovery steam generators, particularly when used behind a gas turbine |
| DE19806244A1 (en) * | 1998-02-16 | 1999-08-19 | Babcock Kraftwerkstech Gmbh | Steam generator with several tube bundles |
| EP1443268A1 (en) * | 2003-01-31 | 2004-08-04 | Siemens Aktiengesellschaft | Steam generator |
| EP2034137A1 (en) * | 2007-01-30 | 2009-03-11 | Siemens Aktiengesellschaft | Method for operating a gas and steam turbine plant and the correspondingly designed gas and steam turbine plant |
| US9518731B2 (en) | 2011-03-23 | 2016-12-13 | General Electric Technology Gmbh | Method and configuration to reduce fatigue in steam drums |
| US20120247406A1 (en) * | 2011-03-28 | 2012-10-04 | Alstom Technology Ltd. | Method of controlling drum temperature transients |
| RU2491477C1 (en) * | 2012-02-08 | 2013-08-27 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Steam generator plant |
| WO2014108980A1 (en) * | 2013-01-10 | 2014-07-17 | パナソニック株式会社 | Rankine cycle device and cogeneration system |
| MX2016011634A (en) | 2014-03-21 | 2017-03-06 | Amec Foster Wheeler Energia S L U | Evaporation cycle of a natural circulation steam generator in connection with a vertical duct for upward gas flow. |
| US9982881B2 (en) * | 2015-04-22 | 2018-05-29 | General Electric Technology Gmbh | Method and system for gas initiated natural circulation vertical heat recovery steam generator |
| EP3835653A1 (en) * | 2019-12-11 | 2021-06-16 | Siemens Aktiengesellschaft | Hot evaporator refilling |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2031423A (en) * | 1929-03-15 | 1936-02-18 | Foster Wheeler Corp | Power plant |
| US2702026A (en) * | 1952-07-31 | 1955-02-15 | Svenska Maskinverken Ab | Steam generating plant utilizing heat emanating from many different sources |
| GB810900A (en) * | 1956-03-22 | 1959-03-25 | Vorkauf Heinrich | Improvements in steam generators with pressure-resistant, cylindrical casings |
| US4188916A (en) * | 1978-05-15 | 1980-02-19 | Deltak Corporation | Waste heat boiler for abstraction of heat energy from gaseous effluent containing corrosive chemical contaminants |
| US4316435A (en) * | 1980-02-27 | 1982-02-23 | General Electric Company | Boiler tube silencer |
-
1988
- 1988-08-29 AT AT2116/88A patent/AT392683B/en not_active IP Right Cessation
-
1989
- 1989-08-09 FI FI893754A patent/FI93055C/en not_active IP Right Cessation
- 1989-08-12 CN CN89106681A patent/CN1018574B/en not_active Expired
- 1989-08-18 DE DE8989890214T patent/DE58904955D1/en not_active Expired - Lifetime
- 1989-08-18 ES ES89890214T patent/ES2043114T3/en not_active Expired - Lifetime
- 1989-08-18 EP EP89890214A patent/EP0357590B1/en not_active Expired - Lifetime
- 1989-08-28 KR KR1019890012272A patent/KR0142330B1/en not_active IP Right Cessation
- 1989-08-28 DK DK422389A patent/DK169109B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DK422389D0 (en) | 1989-08-28 |
| ES2043114T3 (en) | 1993-12-16 |
| EP0357590A1 (en) | 1990-03-07 |
| CN1041438A (en) | 1990-04-18 |
| AT392683B (en) | 1991-05-27 |
| KR0142330B1 (en) | 1998-07-01 |
| FI893754A (en) | 1990-03-01 |
| ATA211688A (en) | 1990-10-15 |
| DE58904955D1 (en) | 1993-08-26 |
| DK422389A (en) | 1990-03-01 |
| FI93055B (en) | 1994-10-31 |
| KR900003582A (en) | 1990-03-26 |
| FI893754A0 (en) | 1989-08-09 |
| FI93055C (en) | 1995-02-10 |
| EP0357590B1 (en) | 1993-07-21 |
| CN1018574B (en) | 1992-10-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AHB | Application shelved due to non-payment | ||
| B1 | Patent granted (law 1993) | ||
| PUP | Patent expired |