EP0564963A2 - Method for the maintenance of a continuously charged high temperature reactor - Google Patents
Method for the maintenance of a continuously charged high temperature reactor Download PDFInfo
- Publication number
- EP0564963A2 EP0564963A2 EP93105283A EP93105283A EP0564963A2 EP 0564963 A2 EP0564963 A2 EP 0564963A2 EP 93105283 A EP93105283 A EP 93105283A EP 93105283 A EP93105283 A EP 93105283A EP 0564963 A2 EP0564963 A2 EP 0564963A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature reactor
- reactor
- hearth
- maintenance
- stove
- 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
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012423 maintenance Methods 0.000 title claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 13
- 239000001301 oxygen Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 4
- 230000008646 thermal stress Effects 0.000 claims abstract 2
- 230000008569 process Effects 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000010815 organic waste Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract 2
- 230000008439 repair process Effects 0.000 description 17
- 239000000463 material Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000000265 homogenisation Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000002309 gasification Methods 0.000 description 3
- 238000012384 transportation and delivery Methods 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/085—High-temperature heating means, e.g. plasma, for partly melting the waste
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/12—Working chambers or casings; Supports therefor
- F27B2003/125—Hearths
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D2001/0046—Means to facilitate repair or replacement or prevent quick wearing
- F27D2001/005—Removable part or structure with replaceable elements
Definitions
- the invention relates to a method for the maintenance of a high-temperature reactor in which the carbon obtained by thermal shaping of organic waste components or other continuously supplied disposal goods is gasified by means of oxygen and the inorganic components of these disposal goods are melted.
- the lower part of a high-temperature reactor is serviced, in which the carbon obtained by thermal transformation of organic waste components is metered Addition of pure oxygen gasifies and the inorganic constituents are melted and removed in molten form.
- the disposal goods are preferably supplied discontinuously but continuously via a pretreatment zone, for example a degassing channel, to the lower hearth of the reactor which is exposed to increased thermal but also mechanical and chemical stresses or loads.
- the disposal goods of interest here are unsorted and untreated, in some cases also as liquid components, first subjected to this heat pretreatment in the continuous working process and for this purpose pushed through the channel receiving them in the compressed state and in the process, both the liquid and the volatile constituents are evaporated in a kind of "caking process” .
- the pretreated domestic, special or industrial waste is subjected to high temperatures in the high temperature reactor in chunks. This avoids the disadvantages of previously known waste incineration processes or corresponding pyrolysis processes, as have been sufficiently described in the literature.
- the advantages are, in particular, a self-contained process technology that in no way pollutes the environment while avoiding the high air flow rates that are inevitable in conventional combustion systems.
- insufficient gas permeability within the bed is guaranteed can be, so that despite high energy consumption there is insufficient gas production and very long residence times in the reactor.
- the chunky introduction of the material to be melted with a continuous feed into the high-temperature reactor provides a reliable remedy here.
- the high-temperature reactor to which the maintenance method according to the invention is applied, is designed in two parts and consists of an upper part and a lower part which can be detached therefrom, that is to say an upper stabilization zone for the resulting gas fractions and the actual furnace hearth, to which the chunk-like pretreated melting material is continuously fed. Upper and lower parts are firmly connected to each other via gas and pressure-tight flange connections.
- the high-temperature reactor is lined with refractory material in a manner known per se, the feed being designed in such a way that temperatures in the interior of the reactor can be set between 1600 and 2000 ° C.
- a plurality of oxygen lances which are guided through the stove feed and which are integrated in the combination burner and are accommodated by cooling jackets, which in turn have a fixed connection with the stove feed, open into the stove area below the loose lump bed that forms there.
- the cooling jackets for the oxygen lances which are guided radially from the outside in through the refractory material, create a temperature gradient in their contact area on the inner surface of the infeed, which at least partially recondenses the material vaporized or liquefied by the oxygen burner, so that it leads to the most varied and uncontrolled chemical Reactions and sintering is coming.
- the cooling jackets of the combination burners with the oxygen feeds are sintered together with the surrounding refractory lining so intensively that they cannot be removed without destroying the infeed. Since only a coolant supply line and a coolant discharge line are provided for the cooling jackets, their coupling and uncoupling process is easy for repair work on the reactor, while the oxygen lances, i.e. the combination burners themselves, which can be moved within the cooling jackets, have a plurality of control connections, monitoring organs, at least an auxiliary gas line and the like are connected, so that their replacement would be relatively complicated.
- the chunky bed in the area of the combination burner is gasified by oxidation to the extent that it is carbon components, while the mineral and metallic components are melted to flow immediately afterwards in molten form into the homogenization reactor, which is preferably lined with a feed corresponding to the gasification area.
- the homogenization reactor structurally forms a unit with the lower part of the high-temperature reactor. The melt is refined within the homogenization reactor, as a result of which a completely homogeneous liquid bath composed of mineral and / or metallic components is formed.
- the linings of the walls in these areas with refractory material are subject to particularly high signs of wear, so that the operating time of the high-temperature reactor is in need of repair or at least limited in maintenance.
- the invention is therefore based on the object of specifying a maintenance procedure for high-temperature reactors, which are subject in particular to the above-mentioned problem, and which, after wear and tear, has subjected the heavily loaded parts to the required parts considerably more quickly than was previously possible Operating status reset so that the downtimes of the system can be significantly reduced.
- the time-consuming maintenance and repair work should be independent of the downtimes for the system.
- the flanges between the upper and lower part of the high-temperature reactor can begin to loosen, at the same time or possibly also shortly before or after the oxygen lances are pulled out of their cooling jackets without them Various connections to control, control and feed and discharge units are interrupted.
- the lower hearth of the high-temperature reactor which forms a structural unit together with the melt pool, is only slightly lowered by a few millimeters compared to the permanently installed upper part of the high-temperature reactor and moved out of its operating position.
- a corresponding reserve unit can be brought up to the high-temperature reactor and the same can be brought into operation for its flanging operation on the upper part of the high-temperature reactor.
- the reserve unit has previously been sufficiently heated to a high temperature close to the operating temperature, for example to 800 ° C. In this way it is possible, immediately after the pressure-tight connection between the lower part and the upper part has been established, to feed the reactor, which was briefly interrupted for the exchange repair, again to record.
- the oxygen feeds are introduced into the cooling jackets of the reserve unit at the same time as possible, so that their operation can also be resumed immediately thereafter.
- the lower part of the reactor to be repaired which is still at a hot operating temperature, can now cool independently of the restart of the plant and, after reaching a temperature which is tolerable for the repair work, can be brought back into an immaculate operating state.
- the intact reserve unit is only heated up when repairs are required, so that it is ready for the next quick exchange.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Gasification And Melting Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Wartung eines Hochtemperaturreaktors, in dem der durch thermische Umformung organischer Müllbestandteile oder anderer kontinuierlich zugeführter Entsorgungsgüter gewonnene Kohlenstoff mittels Sauerstoff vergast und die anorganischen Bestandteile dieser Entsorgungsgüter aufgeschmolzen werden.The invention relates to a method for the maintenance of a high-temperature reactor in which the carbon obtained by thermal shaping of organic waste components or other continuously supplied disposal goods is gasified by means of oxygen and the inorganic components of these disposal goods are melted.
Wartungsverfahren für Hochtemperaturreaktoren sind entsprechend den Wartungs- und Reparaturverfahren für Hochöfen, Drehrohröfen oder dergleichen arbeitsintensiv und außerordentlich zeitaufwendig. Die hohen Betriebstemperaturen, die in derartigen Reaktoren herrschen, bedingen eine dickwandige Auskleidung der Ofenwandungen mit geeignetem Feuerfestmaterial, das als sogenannte Zustellung aus Stampfmasse bestehen kann, bei Mehrschichtauskleidungen jedoch zumindest teilweise auch aus vorgefertigten Feuerfeststeinen. Gegossene oder gestampfte Zustellungen wie auch aus ff-Steinen gemauerte Ofenauskleidungen müssen vor ihrer Inbetriebnahme über längere Zeit getempert werden. Nach Stillsetzung eines reparaturbedürftigen Reaktors bedarf es einer langen Wartezeit, während der die Abkühlung des Ofens auf begehbare Temperaturen erfolgt. Beispielsweise müssen für die Müllverbrennung eingesetzte Drehrohröfen mindestens zweimal jährlich für jeweils sechs Wochen stillgesetzt werden, damit die schadhaft gewordene Zustellung den erforderlichen Reparaturen unterzogen werden kann.Maintenance procedures for high-temperature reactors are labor-intensive and extremely time-consuming, corresponding to the maintenance and repair procedures for blast furnaces, rotary kilns or the like. The high operating temperatures that prevail in such reactors require a thick-walled lining of the furnace walls with a suitable refractory material, which may consist of ramming paste as a so-called infeed, but in multilayer linings at least partially also from prefabricated refractory bricks. Cast or stamped inlays as well as furnace linings made of ff bricks must be annealed for a long time before they are put into operation. After a reactor in need of repair has been shut down, there is a long waiting period during which the furnace cools down to accessible temperatures. For example, for waste incineration rotary kilns used are shut down at least twice a year for six weeks each so that the damaged delivery can be subjected to the necessary repairs.
Ähnlich verhält es sich mit Hochöfen, in denen Metallschmelzen erzeugt bzw. metallurgische Prozesse ablaufen. Um die insbesondere durch die zwingend vorgesehenen langen Abkühl- und Wiederaufheizzeiten bedingten Ausfall-Reparaturzeiten von Metall-Schmelzöfen abzukürzen, ist es bei einem Verfahren zum Schmelzen von Metallschrott, insbesondere Stahlschrott oder dgl. hochschmelzendes Einsatzmaterial in einem kokslos betriebenen Schachtofen, bereits bekannt, den lösbar montierten Unterherd des Ofens nach entsprechendem Verschleiß der Zustellung über eine Hydraulikvorrichtung abzusenken und getrennt vom Ofenschacht der erforderlichen Reparatur zu unterziehen (DE 37 42 349 C1). Die Beschickung derartiger Schachtöfen erfolgt diskontinuierlich, d.h. das Beschickungsmaterial wird über einen gasdichten Verschluß in den Topbereich des Ofenschachtes chargiert.The situation is similar with blast furnaces in which molten metal is produced or metallurgical processes take place. In order to shorten the failure repair times of metal melting furnaces, in particular due to the long cooling and reheating times that are mandatory, it is already known that a method for melting metal scrap, in particular steel scrap or the like. High-melting feedstock in a shaft furnace operated without coke, is detachable Lower the installed lower hearth of the furnace after corresponding wear of the infeed using a hydraulic device and subject it to the necessary repair separately from the furnace shaft (DE 37 42 349 C1). Such shaft furnaces are fed batchwise, i.e. the feed material is charged into the top area of the furnace shaft using a gas-tight seal.
In diesem Zusammenhang ist noch auf einen Metallschmelzofen mit vertikalem Ofenschacht und angeflanschtem Unterherd zu verweisen, bei dem die Ringflanschebene radial eingezogen ausgebildet ist, so daß sich eine besonders einfach zu handhabende Flanschverbindung ergibt (US 4,291,634).In this context, reference should also be made to a metal melting furnace with a vertical furnace shaft and flanged-on lower hearth, in which the ring flange plane is designed to be drawn in radially, so that a particularly easy-to-use flange connection results (US Pat. No. 4,291,634).
Im vorliegenden Falle handelt es sich um die Wartung des unteren Teils eines Hochtemperaturreaktors, in dem der durch thermische Transformation organischer Müllbestandteile gewonnene Kohlenstoff durch dosierte Zugabe von reinem Sauerstoff vergast und die anorganischen Bestandteile aufgeschmolzen und in schmelzflüssiger Form abgezogen werden. Die Entsorgungsgüter werden hierfür vorzugsweise nicht diskontinuierlich sondern kontinuierlich über eine Vorbehandlungszone, etwa einen Entgasungskanal, dem erhöhten thermischen aber auch mechanischen und chemischen Beanspruchungen bzw. Belastungen ausgesetzten Unterherd des Reaktors zugeführt.In the present case, the lower part of a high-temperature reactor is serviced, in which the carbon obtained by thermal transformation of organic waste components is metered Addition of pure oxygen gasifies and the inorganic constituents are melted and removed in molten form. For this purpose, the disposal goods are preferably supplied discontinuously but continuously via a pretreatment zone, for example a degassing channel, to the lower hearth of the reactor which is exposed to increased thermal but also mechanical and chemical stresses or loads.
Die hier interessierenden Entsorgungsgüter werden unsortiert und unbehandelt, teilweise auch als flüssige Komponenten, zunächst dieser Wärmevorbehandlung im fortlaufenden Arbeitsprozeß unterworfen und hierfür durch den sie im verdichteten Zustand aufnehmenden Kanal hindurchgeschoben und hierbei in einer Art "Zusammenbackprozeß" sowohl die flüssigen als auch die flüchtigen Bestandteile abgedampft. Brockenförmig wird der so vorbehandelte Haus-, Sonder- oder Industriemüll der Hochtemperaturbeaufschlagung im Hochtemperaturreaktor unterworfen. Damit werden die Nachteile bisher bekannter Müllverbrennungsverfahren oder entsprechender Pyrolyseverfahren, wie sie hinlänglich in der Literatur beschrieben sind, vermieden.The disposal goods of interest here are unsorted and untreated, in some cases also as liquid components, first subjected to this heat pretreatment in the continuous working process and for this purpose pushed through the channel receiving them in the compressed state and in the process, both the liquid and the volatile constituents are evaporated in a kind of "caking process" . The pretreated domestic, special or industrial waste is subjected to high temperatures in the high temperature reactor in chunks. This avoids the disadvantages of previously known waste incineration processes or corresponding pyrolysis processes, as have been sufficiently described in the literature.
Die Vorteile liegen insbesondere in einer in sich geschlossenen und damit die Umwelt in keiner Weise belastenden Verfahrenstechnik unter Vermeidung der bei konventionellen Verbrennungsanlagen zwangsläufig gegebenen hohen Luftdurchsätze. Bei den bekannten Einschmelzverfahren von zuvor pyrolysiertem Entsorgungsgut innerhalb eines Hochtemperaturreaktors, in dem dieses in Form einer Bettschüttung eingebracht wird, hat sich gezeigt, daß keine ausreichende Gasdurchlässigkeit innerhalb der Bettschüttung gewährleistet werden kann, so daß sich trotz hohem Energieaufwand eine ungenügende Gasgewinnung und sehr lange Verweilzeiten im Reaktor ergeben.The advantages are, in particular, a self-contained process technology that in no way pollutes the environment while avoiding the high air flow rates that are inevitable in conventional combustion systems. In the known melting processes of previously pyrolyzed waste material within a high-temperature reactor, in which it is introduced in the form of a bed, it has been shown that insufficient gas permeability within the bed is guaranteed can be, so that despite high energy consumption there is insufficient gas production and very long residence times in the reactor.
Das brockige Einführen des aufzuschmelzenden Materials bei kontinuierlichem Zulauf in den Hochtemperaturreaktor schafft hier zuverlässig Abhilfe. Der Hochtemperaturreaktor, auf den das erfindungsgemäße Wartungsverfahren Anwendung findet, ist zweiteilig ausgeführt und besteht aus einem Oberteil und einem hiervon lösbaren Unterteil, d.h. einer oberen Stabilisierungszone für die entstehenden Gasfraktionen und dem eigentlichen Ofenherd, dem kontinuierlich das brockenförmig vorbehandelte Schmelzmaterial zugeführt wird. Ober- und Unterteile sind über gas- und druckdichte Flanschverbindungen fest miteinander verbunden. Der Hochtemperaturreaktor ist in an sich bekannter Weise mit Feuerfestmaterial ausgekleidet, wobei die Zustellung so ausgelegt ist, daß Temperaturen im Inneren des Reaktors zwischen 1600 bis 2000° C vorgegeben werden können. Im Herdbereich unterhalb der sich dort ausbildenden losen Brockenschüttung münden vorzugsweise mehrere durch die Herdzustellung hindurchgeführte Sauerstofflanzen, die im Kombinationsbrenner integriert sind und die von Kühlmänteln aufgenommen sind, die ihrerseits eine feste Verbindung mit der Herdzustellung aufweisen. Durch die radial von außen nach innen durch das Feuerfestmaterial hindurchgeführten Kühlmäntel für die Sauerstofflanzen entsteht in deren Kontaktbereich an der inneren Oberfläche der Zustellung ein Temperaturgefälle, welches das durch die Sauerstoffbrenner verdampfte oder verflüssigte Material hier wenigstens teilweise rückkondensiert, so daß es zu unterschiedlichsten und unkontrollierten chemischen Reaktionen und Versinterungen kommt. Bereits nach kurzem Betrieb des Hochtemperaturreaktors sind die Kühlmäntel der Kombinationsbrenner mit den Sauerstoffzuführungen derart intensiv mit der sie umgebenden Feuerfestauskleidung zusammengesintert, daß ein Herausziehen derselben ohne Zerstörung der Zustellung nicht mehr möglich ist. Da für die Kühlmäntel ausschließlich eine Kühlmittelzuleitung und eine Kühlmittelableitung vorgesehen sind, ist deren An- und Abkuppelvorgang für Reparaturarbeiten am Reaktor problemlos, während die Sauerstofflanzen, also die Kombinationsbrenner selbst, die innerhalb der Kühlmäntel verschiebbar sind, mit einer Mehrzahl von Kontrollanschlüssen, Überwachungsorganen, wenigstens einer Hilfsgasleitung und dergleichen in Verbindung stehen, so daß ihr Austausch sich relativ kompliziert gestalten würde.The chunky introduction of the material to be melted with a continuous feed into the high-temperature reactor provides a reliable remedy here. The high-temperature reactor, to which the maintenance method according to the invention is applied, is designed in two parts and consists of an upper part and a lower part which can be detached therefrom, that is to say an upper stabilization zone for the resulting gas fractions and the actual furnace hearth, to which the chunk-like pretreated melting material is continuously fed. Upper and lower parts are firmly connected to each other via gas and pressure-tight flange connections. The high-temperature reactor is lined with refractory material in a manner known per se, the feed being designed in such a way that temperatures in the interior of the reactor can be set between 1600 and 2000 ° C. A plurality of oxygen lances, which are guided through the stove feed and which are integrated in the combination burner and are accommodated by cooling jackets, which in turn have a fixed connection with the stove feed, open into the stove area below the loose lump bed that forms there. The cooling jackets for the oxygen lances, which are guided radially from the outside in through the refractory material, create a temperature gradient in their contact area on the inner surface of the infeed, which at least partially recondenses the material vaporized or liquefied by the oxygen burner, so that it leads to the most varied and uncontrolled chemical Reactions and sintering is coming. After only a short operation of the high-temperature reactor, the cooling jackets of the combination burners with the oxygen feeds are sintered together with the surrounding refractory lining so intensively that they cannot be removed without destroying the infeed. Since only a coolant supply line and a coolant discharge line are provided for the cooling jackets, their coupling and uncoupling process is easy for repair work on the reactor, while the oxygen lances, i.e. the combination burners themselves, which can be moved within the cooling jackets, have a plurality of control connections, monitoring organs, at least an auxiliary gas line and the like are connected, so that their replacement would be relatively complicated.
Mittels der Zuführung von reinem Sauerstoff oder Sauerstoff angereicherter Luft in den Vergasungs- bzw. Schmelzbereich des Hochtemperaturreaktors wird im Bereich der Ebene der Kombinationsbrenner die brockige Schüttung soweit es sich hierbei um Kohlenstoffanteile handelt durch Oxidation vergast, während die mineralischen und metallischen Bestandteile aufgeschmolzen werden, um unmittelbar anschließend in schmelzflüssiger Form in den Homogenisierungsreaktor zu fließen, der vorzugsweise mit einer dem Vergasungsbereich entsprechenden Zustellung ausgekleidet ist. Der Homogenisierungsreaktor bildet baulich eine Einheit mit dem Unterteil des Hochtemperaturreaktors. Innerhalb des Homogenisierungsreaktors erfolgt eine Läuterung der Schmelze, wodurch sich ein vollkommen homogenes Flüssigbad aus mineralischen und/oder metallischen Komponenten ausbildet. Infolge der im Vergasungsbereich des Hochtemperaturreaktors und dem Homogenisierungsbereich herrschenden besonders aggressiven chemischen und mechanischen Beanspruchungen wie auch der hohen Temperaturwerte sind die Auskleidungen der Wandungen in diesen Bereichen mit Feuerfestmaterial besonders hohen Abnutzungserscheinungen unterworfen, so daß die Einsatzzeit des Hochtemperaturreaktors reparaturbedürftig bzw. zumindest wartungsbedürftig begrenzt ist.By supplying pure oxygen or oxygen-enriched air to the gasification or melting area of the high-temperature reactor, the chunky bed in the area of the combination burner is gasified by oxidation to the extent that it is carbon components, while the mineral and metallic components are melted to flow immediately afterwards in molten form into the homogenization reactor, which is preferably lined with a feed corresponding to the gasification area. The homogenization reactor structurally forms a unit with the lower part of the high-temperature reactor. The melt is refined within the homogenization reactor, as a result of which a completely homogeneous liquid bath composed of mineral and / or metallic components is formed. As a result of that in the gasification area of the high temperature reactor and the homogenization area prevailing particularly aggressive chemical and mechanical stresses as well as the high temperature values, the linings of the walls in these areas with refractory material are subject to particularly high signs of wear, so that the operating time of the high-temperature reactor is in need of repair or at least limited in maintenance.
Die entsprechend dem Stand der Technik für Reparaturen an Hochöfen und Hochtemperaturreaktoren an deren Zustellungen zwangsläufig bedingten hohen Stillstandzeiten der Reaktoren können möglicherweise bei intermettierend zu chargierenden Kupolöfen oder dergleichen hingenommen werden, nicht aber dort, wo die Zuführung des aufzuschmelzenden bzw. verdampfenden Materials kontinuierlich erfolgt und bedingt durch deren Vorbehandlung kontinuierlich erfolgen muß. In Müllaufbereitungsanlagen erfolgt die Müllanlieferung kontinuierlich. Die Lagerung von sich durch Fäulnis oder dergleichen zersetzenden Müllkomponenten, beispielsweise in heißer Sommerzeit, während sechswöchiger Reparaturarbeiten im Zulieferbereich der Anlage ist unmöglich. Die Logistik, die solchen Problemanlagen zugrunde liegt, muß solche Stillstandzeiten ausschließen. Es müssen alternative Entsorgungseinrichtungen vorgehalten werden, die während der mehrwöchigen Reparaturzeiten genutzt werden können.The inevitable long downtimes of the reactors corresponding to the state of the art for repairs to blast furnaces and high-temperature reactors at their deliveries can possibly be accepted with cupola furnaces or the like to be charged intermittently, but not where the supply of the material to be melted or evaporated is continuous and conditional must be carried out continuously by their pretreatment. Waste delivery takes place continuously in waste treatment plants. The storage of waste components that decompose due to rot or the like, for example in hot summer time, during six weeks of repair work in the supply area of the plant is impossible. The logistics on which such problem systems are based must rule out such downtimes. Alternative disposal facilities must be kept available, which can be used during the repair period of several weeks.
Der Erfindung liegt daher die Aufgabe zugrunde, für Hochtemperaturreaktoren, die insbesondere der vorstehend genannten Problematik unterliegen, ein Wartungsturverfahren vorzugeben, welches dessen stark belasteten Teile nach erfolgter Abnutzung erheblich schneller als bisher möglich in den erforderlichen Betriebszustand zurückversetzt, so daß die Stillstandzeiten der Anlage erheblich reduziert werden können. Der zeitlich große Wartungs- bzw. Reparaturaufwand soll unabhängig von den für die Anlage gegebenen Stillstandzeiten sein.The invention is therefore based on the object of specifying a maintenance procedure for high-temperature reactors, which are subject in particular to the above-mentioned problem, and which, after wear and tear, has subjected the heavily loaded parts to the required parts considerably more quickly than was previously possible Operating status reset so that the downtimes of the system can be significantly reduced. The time-consuming maintenance and repair work should be independent of the downtimes for the system.
Diese Aufgabe wird durch die Merkmale des Patentanspruches gelöst.This object is achieved by the features of the patent claim.
Erfindungswesentlich ist somit, daß für einen solchen Hochtemperaturreaktor mit kontinuierlicher Zuführung des Reaktormaterials eine Aufteilung in einen feststehenden Reaktorteil und einen solchen, der von diesem lösbar und entfernbar ist, vorgenommen wird, so daß der Austausch dieses verfahrbaren Reaktorteils in kurzer Zeit möglich und unabhängig von der eigentlichen Wartungs- bzw. Reparaturzeit ist. Die Beschickung eines solchen Reaktors muß somit ausschließlich während des Austausches der lösbaren Reaktorteile unterbrochen werden und das Lösen und Ausfahren dieses oder derartiger Teile und ihr Austausch gegen neue oder reparierte identische Teile erfordert eine von der eigentlichen Wartung und/oder Reparatur unabhängige Zeit.It is therefore essential to the invention that for such a high-temperature reactor with continuous supply of the reactor material, a division into a fixed reactor part and one which is detachable and removable from it is carried out, so that the exchange of this movable reactor part is possible in a short time and independently of that actual maintenance or repair time. The loading of such a reactor must therefore only be interrupted during the exchange of the detachable reactor parts and the loosening and extension of this or such parts and their replacement for new or repaired identical parts requires a time which is independent of the actual maintenance and / or repair.
Sobald für den geplanten Austausch die Beschickung des Reaktors unterbrochen ist und die im unteren Herdteil noch vorhandenen Feststoffe aufgeschmolzen bzw. vergast sind und auch das resliche Schmelzbad ausgetragen ist, kann das Lösen der Flansche zwischen Ober- und Unterteil des Hochtemperaturreaktors beginnen, während gleichzeitig oder möglicherweise auch kurz vorher bzw. nachher die Sauerstofflanzen aus ihren Kühlmänteln herausgezogen werden, ohne daß deren diverse Anschlüsse an Steuer-, Kontroll- und Zuführungs- wie Abführungseinheiten unterbrochen werden. Der Unterherd des Hochtemperaturreaktors, der zusammen mit dem Schmelzbadbehälter eine bauliche Einheit bildet, wird gegenüber dem fest installierten Oberteil des Hochtemperaturreaktors nur leicht um wenige Millimeter abgesenkt und aus seiner Betriebsstellung herausgefahren. Zeitlich mit diesem Vorgang synchronisiert kann das Heranfahren einer entsprechenden Reserveeinheit an den Hochtemperaturreaktor und die Instellungbringung desselben für dessen Anflanschvorgang an das Oberteil des Hochtemperaturreaktors erfolgen. Hierfür ist ausreichend zuvor die Reserveeinheit auf eine der Betriebstemperatur naheliegende hohe Temperatur aufgeheizt worden, beispielsweise auf 800° C. Auf diese Weise wird es möglich, bereits unmittelbar nach Herstellung der druckdichten Verbindung zwischen Unterteil und Oberteil die für die Austauschreparatur kurzfristig unterbrochene Beschickung des Reaktors wieder aufzunehmen. Während des Anflanschvorganges werden möglichst gleichzeitig die Sauerstoffzuführungen in die Kühlmäntel der Reserveeinheit eingeführt, so daß auch deren Betrieb unmittelbar anschließend wieder aufgenommen werden kann.As soon as the feed to the reactor has been interrupted for the planned replacement and the solids still present in the lower part of the hearth have melted or gasified and the residual melt bath has also been discharged, the flanges between the upper and lower part of the high-temperature reactor can begin to loosen, at the same time or possibly also shortly before or after the oxygen lances are pulled out of their cooling jackets without them Various connections to control, control and feed and discharge units are interrupted. The lower hearth of the high-temperature reactor, which forms a structural unit together with the melt pool, is only slightly lowered by a few millimeters compared to the permanently installed upper part of the high-temperature reactor and moved out of its operating position. Synchronized with this process, a corresponding reserve unit can be brought up to the high-temperature reactor and the same can be brought into operation for its flanging operation on the upper part of the high-temperature reactor. For this purpose, the reserve unit has previously been sufficiently heated to a high temperature close to the operating temperature, for example to 800 ° C. In this way it is possible, immediately after the pressure-tight connection between the lower part and the upper part has been established, to feed the reactor, which was briefly interrupted for the exchange repair, again to record. During the flanging process, the oxygen feeds are introduced into the cooling jackets of the reserve unit at the same time as possible, so that their operation can also be resumed immediately thereafter.
Der sich noch auf heißer Betriebstemperatur befindende zu reparierende untere Reaktorteil kann nunmehr unabhängig von der Wiederinbetriebnahme der Anlage abkühlen und nach Erreichen einer für die Reparaturarbeiten erträglichen Temperatur erneut in einen makellosen Betriebszustand gebracht werden. Erst wenn eine wieder erforderlich werdende Reparatur bevorsteht, wird die intakte Reserveeinheit aufgeheizt, so daß sie für den nächsten schnellen Austausch betriebsbereit ist.The lower part of the reactor to be repaired, which is still at a hot operating temperature, can now cool independently of the restart of the plant and, after reaching a temperature which is tolerable for the repair work, can be brought back into an immaculate operating state. The intact reserve unit is only heated up when repairs are required, so that it is ready for the next quick exchange.
Die bisher für Hochtemperaturreaktoren oder vergleichbare Verbrennungs- bzw. Schmelzöfen erforderlichen Stillstand- und Reparaturzeiten von mehreren Wochen werden durch das vorliegende erfindungsgemäße Austauschverfahren auf nur wenige Stunden reduziert, was die quasi kontinuierliche Arbeitsweise der Gesamtanlage garantiert, ihre Produktivität erhöht, die Betriebssicherheit verbessert und Gefahren für die Umwelt wie auch das Betriebspersonal ausschließt.The downtime and repair times of several weeks previously required for high-temperature reactors or comparable combustion or melting furnaces are reduced to just a few hours by the present exchange method, which guarantees the quasi-continuous operation of the entire system, increases its productivity, improves operational safety and threats to excludes the environment as well as the operating personnel.
Claims (1)
durch Austausch des infolge mechanischer, chemischer und/oder thermischer Beanspruchung beschädigten, an dem feststehenden Oberteil des als Schmelz- und Homogenisierungsreaktor betriebenen Hochtemperaturreaktors angeflanschten, mit einem Schmelzbadherd eine bauliche Einheit bildenden unteren Herdteils gegen eine, dieser Einheit entsprechender Reserveeinheit, wobei der Austausch in folgenden Verfahrensschritten abläuft:
by replacing the damaged, mechanical, chemical and / or thermal stress, flanged to the fixed upper part of the high-temperature reactor, which is operated as a melting and homogenizing reactor, with a melting bath stove, a structural unit forming a structural unit with a reserve unit corresponding to this unit, the replacement in the following Process steps in progress:
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4211514A DE4211514C1 (en) | 1992-04-06 | 1992-04-06 | |
| DE4211514 | 1992-04-06 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0564963A2 true EP0564963A2 (en) | 1993-10-13 |
| EP0564963A3 EP0564963A3 (en) | 1994-02-02 |
| EP0564963B1 EP0564963B1 (en) | 1996-07-03 |
Family
ID=6456208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93105283A Expired - Lifetime EP0564963B1 (en) | 1992-04-06 | 1993-03-30 | Method for the maintenance of a continuously charged high temperature reactor |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0564963B1 (en) |
| JP (1) | JP3084168B2 (en) |
| KR (1) | KR100246506B1 (en) |
| CN (1) | CN1080391A (en) |
| AT (1) | ATE140077T1 (en) |
| AU (1) | AU657850B2 (en) |
| CA (1) | CA2093389A1 (en) |
| DE (2) | DE4211514C1 (en) |
| DK (1) | DK0564963T3 (en) |
| ES (1) | ES2089621T3 (en) |
| TW (1) | TW213972B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103960754B (en) * | 2014-04-25 | 2016-06-01 | 新疆农业科学院农业机械化研究所 | Disc type recirculating air drying plant and method |
| KR101934511B1 (en) | 2018-05-14 | 2019-01-02 | 김창성 | Coupler for clamping polishing disk |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3482533A (en) * | 1968-06-28 | 1969-12-09 | Borge Richard Ankersen | Incinerators |
| GB1410099A (en) * | 1973-06-11 | 1975-10-15 | Electricity Council | Cupolas or shaft furnaces |
| US4291634A (en) * | 1980-05-29 | 1981-09-29 | Union Carbide Corporation | Solid refuse disposal apparatus |
| DE3529740C1 (en) * | 1985-08-20 | 1987-01-08 | Greul Artur Richard | Process and equipment for gasifying carbonaceous wastes, if appropriate with addition of toxic and highly toxic wastes, to give synthesis gas |
| EP0230180A1 (en) * | 1985-12-13 | 1987-07-29 | Clecim Sa | Process and installation for maintaining the lining of a furnace vessel |
| US4848250A (en) * | 1988-08-25 | 1989-07-18 | Wunderley John M | Refuse converter |
| EP0520086A2 (en) * | 1991-06-18 | 1992-12-30 | Thermoselect Aktiengesellschaft | Process for the valorisation of all kinds of waste |
-
1992
- 1992-04-06 DE DE4211514A patent/DE4211514C1/de not_active Expired - Fee Related
-
1993
- 1993-03-24 KR KR1019930004608A patent/KR100246506B1/en not_active IP Right Cessation
- 1993-03-30 DE DE59303104T patent/DE59303104D1/en not_active Expired - Fee Related
- 1993-03-30 AT AT93105283T patent/ATE140077T1/en active
- 1993-03-30 DK DK93105283.1T patent/DK0564963T3/en active
- 1993-03-30 EP EP93105283A patent/EP0564963B1/en not_active Expired - Lifetime
- 1993-03-30 ES ES93105283T patent/ES2089621T3/en not_active Expired - Lifetime
- 1993-04-05 CN CN93105440A patent/CN1080391A/en active Pending
- 1993-04-05 JP JP05078152A patent/JP3084168B2/en not_active Expired - Lifetime
- 1993-04-05 CA CA002093389A patent/CA2093389A1/en not_active Abandoned
- 1993-04-05 AU AU36706/93A patent/AU657850B2/en not_active Ceased
- 1993-04-14 TW TW082102838A patent/TW213972B/zh active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3482533A (en) * | 1968-06-28 | 1969-12-09 | Borge Richard Ankersen | Incinerators |
| GB1410099A (en) * | 1973-06-11 | 1975-10-15 | Electricity Council | Cupolas or shaft furnaces |
| US4291634A (en) * | 1980-05-29 | 1981-09-29 | Union Carbide Corporation | Solid refuse disposal apparatus |
| DE3529740C1 (en) * | 1985-08-20 | 1987-01-08 | Greul Artur Richard | Process and equipment for gasifying carbonaceous wastes, if appropriate with addition of toxic and highly toxic wastes, to give synthesis gas |
| EP0230180A1 (en) * | 1985-12-13 | 1987-07-29 | Clecim Sa | Process and installation for maintaining the lining of a furnace vessel |
| US4848250A (en) * | 1988-08-25 | 1989-07-18 | Wunderley John M | Refuse converter |
| EP0520086A2 (en) * | 1991-06-18 | 1992-12-30 | Thermoselect Aktiengesellschaft | Process for the valorisation of all kinds of waste |
Also Published As
| Publication number | Publication date |
|---|---|
| TW213972B (en) | 1993-10-01 |
| JP3084168B2 (en) | 2000-09-04 |
| DE4211514C1 (en) | 1993-06-17 |
| KR100246506B1 (en) | 2000-04-01 |
| EP0564963A3 (en) | 1994-02-02 |
| DE59303104D1 (en) | 1996-08-08 |
| DK0564963T3 (en) | 1996-07-29 |
| CA2093389A1 (en) | 1993-10-07 |
| CN1080391A (en) | 1994-01-05 |
| AU3670693A (en) | 1993-10-14 |
| EP0564963B1 (en) | 1996-07-03 |
| KR930022043A (en) | 1993-11-23 |
| JPH0626631A (en) | 1994-02-04 |
| AU657850B2 (en) | 1995-03-23 |
| ES2089621T3 (en) | 1996-10-01 |
| ATE140077T1 (en) | 1996-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1466022B1 (en) | Method for the pyrometallurgical treatment of metals, metal melts and/or slags and injection device | |
| DE112011100718T5 (en) | Carbon conversion system with integrated processing zones | |
| DE3513732A1 (en) | METHOD OF METAL PRODUCTION AND / OR SLAG PRODUCTION | |
| DE2428891C3 (en) | Shaft furnace for melting mineral substances for the production of mineral wool | |
| DD243716A5 (en) | METHOD AND DEVICE FOR PRODUCING LIQUID RAW STEEL OR STEEL PREPARED PRODUCTS | |
| DE3423247C2 (en) | Method and device for producing steel from scrap | |
| EP0564963B1 (en) | Method for the maintenance of a continuously charged high temperature reactor | |
| EP2347182A2 (en) | Method for operating a system for producing bioethanol | |
| DE3219984C2 (en) | ||
| EP0626540B1 (en) | Method and device for the disposal of variously composed waste materials | |
| WO2012123320A1 (en) | Metallurgical plant with efficient waste-heat utilization | |
| EP0790291A2 (en) | Process for operating a high-temperature reactor for the treatment of waste products | |
| DE102014215794A1 (en) | Burner lance unit | |
| DE202009002781U1 (en) | Reactor for the thermal treatment of a feedstock | |
| EP1323809B1 (en) | Co-current shaft reactor | |
| DE3134429T1 (en) | ATMOSPHERE CONTROLLED ELECTRIC MELTING | |
| EP1338847B1 (en) | Cocurrent Shaft Reactor | |
| DE102004010407B4 (en) | Reactor for thermal waste treatment | |
| EP0671475A1 (en) | Process for the production of liquid steel from scrap | |
| EP2882875B1 (en) | Method for operating a blower lance arrangement, and blower lance arrangement itself | |
| DE3324064C2 (en) | ||
| EP1286123A1 (en) | Apparatus for melting metals and method for operating such an apparatus | |
| DE69719035T2 (en) | Pouring furnace for automatic pouring | |
| WO2017129816A1 (en) | Method for the carbothermal reduction of zinc oxide to zinc | |
| EP0511195B1 (en) | Process for continuous melting of shredded scrap and mixed scrap |
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): AT BE CH DE DK ES FR GB IT LI 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): AT BE CH DE DK ES FR GB IT LI NL SE |
|
| 17P | Request for examination filed |
Effective date: 19940223 |
|
| 17Q | First examination report despatched |
Effective date: 19950308 |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| 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 ES FR GB IT LI NL SE |
|
| REF | Corresponds to: |
Ref document number: 140077 Country of ref document: AT Date of ref document: 19960715 Kind code of ref document: T |
|
| ITF | It: translation for a ep patent filed | ||
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: TROESCH SCHEIDEGGER WERNER AG |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
| REF | Corresponds to: |
Ref document number: 59303104 Country of ref document: DE Date of ref document: 19960808 |
|
| ET | Fr: translation filed | ||
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19960820 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2089621 Country of ref document: ES Kind code of ref document: T3 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2089621 Country of ref document: ES Kind code of ref document: T3 |
|
| 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 | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20000309 Year of fee payment: 8 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20000314 Year of fee payment: 8 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20000317 Year of fee payment: 8 Ref country code: FR Payment date: 20000317 Year of fee payment: 8 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20000321 Year of fee payment: 8 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 20000324 Year of fee payment: 8 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20000331 Year of fee payment: 8 Ref country code: AT Payment date: 20000331 Year of fee payment: 8 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20000427 Year of fee payment: 8 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20000530 Year of fee payment: 8 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010330 Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010330 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010330 |
|
| 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: 20010331 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010331 Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010331 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010331 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010331 |
|
| BERE | Be: lapsed |
Owner name: THERMOSELECT A.G. Effective date: 20010331 |
|
| 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: 20011001 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 93105283.1 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20010330 |
|
| 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: 20011130 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20011001 |
|
| 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: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020101 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20030303 |
|
| 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: 20050330 |