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WO1993024420A1 - Oven for the vitrification of waste, in particular incinerator-plant and asbestos dusts - Google Patents

Oven for the vitrification of waste, in particular incinerator-plant and asbestos dusts Download PDF

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Publication number
WO1993024420A1
WO1993024420A1 PCT/EP1992/001686 EP9201686W WO9324420A1 WO 1993024420 A1 WO1993024420 A1 WO 1993024420A1 EP 9201686 W EP9201686 W EP 9201686W WO 9324420 A1 WO9324420 A1 WO 9324420A1
Authority
WO
WIPO (PCT)
Prior art keywords
oven according
hood
basin
melt
oven
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.)
Ceased
Application number
PCT/EP1992/001686
Other languages
German (de)
French (fr)
Inventor
Helmut Pieper
Helmut Sorg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beteiligungen Sorg GmbH and Co KG
Original Assignee
Beteiligungen Sorg GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beteiligungen Sorg GmbH and Co KG filed Critical Beteiligungen Sorg GmbH and Co KG
Priority to PL92302306A priority Critical patent/PL302306A1/en
Priority to EP92916185A priority patent/EP0596951A1/en
Priority to SK94-94A priority patent/SK9494A3/en
Publication of WO1993024420A1 publication Critical patent/WO1993024420A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B3/00—Charging the melting furnaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/005—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture of glass-forming waste materials
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
    • C03B5/027—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating
    • C03B5/0272—Pot furnaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
    • C03B5/027—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating
    • C03B5/03—Tank furnaces
    • C03B5/031—Cold top tank furnaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B2101/00—Type of solid waste
    • B09B2101/35—Asbestos
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping

Definitions

  • the invention relates to a furnace and rotten furnace, in particular dusts from vend basins, with asbestos, with a melt and a blanket arranged above it, with a length and with a device for the n. 15 to be melted above Ele. protruding into the melt
  • a simple object of the invention is to produce the n furnace of one type and with little effort, with a small number of gears mentioned, This object is achieved in the oven mentioned at the outset by the fact that its basin is embedded in the ground. In this way, an extremely simple and inexpensive furnace construction is achieved.
  • At least the basin walls can advantageously consist of a protective layer. This is particularly useful if the ground does not already consist of a hard-melting natural rock.
  • FIG. 1 shows a furnace in a first embodiment in vertical section
  • Figure 2 shows the oven in a second embodiment also in vertical section.
  • the furnace consists of a basin 1 excavated on a suitable site and embedded in the ground 3.
  • This basin 1 is lined with a protective layer 2 of refractory concrete on the side walls and in the lower horizontal part.
  • a protective layer 2 of refractory concrete
  • hard-melting natural rock such as granite or the like
  • the basin 1 can also be surrounded only by a foundation 2a for the structures.
  • the outline shape of the basin 1 is preferably round or polygonal.
  • the basin 1 has a simple sheet steel hood 5 as the ceiling, the foundation in the form of a fire-concrete strip 2a forming the support for the hood 5 at the edge of the basin.
  • an inner tube 6 is attached, to which an input tube 7 is attached telescopically, which is adjustable in height by an adjusting rod 8 in the center of the tubes 6, 7.
  • a screw conveyor 9 opens at the top, with which the batch to be melted is conveyed from a bunker 10 into the furnace.
  • the hood 5 also has an exhaust pipe 11, which leads to a flue gas cleaning system, not shown.
  • the hood 5 has concentrically arranged, angularly adjustable electrode bushings 12 through which electrodes 13 are inserted into the interior of the basin 1 and into a melt 14 located therein.
  • the electrodes 13 are supplied with electrical energy from a furnace transformer in the usual manner and can be extended and replenished if necessary.
  • the batch is introduced into the inner tube 6 via the screw 9, falls downward and forms a batch blanket 18 floating on the melt 14.
  • the lower end of the input tube 7 is adjusted in height so that the natural slope angle of the batch is completely covered the surface of the melt 14 leads within the basin 1.
  • a ring line 19 is installed at the upper end of the hood 5, which is equipped with nozzles, so that the hood 5 can be cooled from above with water if necessary.
  • the amount of water can be such that the water evaporates before it reaches the lower part of the hood 5, whereby the temperature of the metal forming the hood 5 can be kept just above 100 ° C.
  • the protective layer 2 may leak during operation of the furnace.
  • the melt will solidify and thereby seal itself at the latest in the cool environment of the basin 1, so that no further erosion of the ground 3 can then be expected. Repair work is therefore not necessary.
  • Basin 1 solidifies into a solid vitreous body that remains in place. Since the vitreous body is largely resistant to chemical attacks, the vitreous body can be left in the ground without any risk to the environment and groundwater.
  • the relatively light hood 5 with the devices 6, 7, 8, 9, 10 for the batch feed can be dismantled very quickly after the basin 1 has completely melted and can be reassembled at another location, so that the furnace is particularly suitable for soil remedial measures can follow the progress of the work.
  • the furnace shown here also consists of a basin 1 lying in the ground 3.
  • This basin. 1 is here only lined with a protective layer 2 of fire concrete on the side walls.
  • a circular arc which is preferably at a distance of approximately 1 m from the inner edge of the basin 1, holes approximately 2 m deep are drilled into which cooling tubes 4 are inserted.
  • These cooling tubes 4 are charged with water and are preferably connected in series. They serve to cool the ground 3 in the vicinity of the basin 1 in order to prevent the ground 3 from melting.
  • the basin 1 also has a sheet steel hood 5, the aboveground ends of the cooling pipes 4 serving as abutments for the hood 5, and a fire-reinforced concrete strip 2a forming the support for the hood 5 at the pool edge.
  • the hood 5 and the parts 6 to 13 arranged thereon correspond to those of the exemplary embodiment according to FIG. 1, and reference is made to the description given there.
  • the furnace according to FIG. 2 also has a melt 14 removed
  • the outlet is formed by a passage 15 and a riser 16 which merges into an overflow 17.
  • the riser 16 is heated by an immersion electrode 13 'which is electrically connected to one of the electrodes 13 in the basin 1.
  • cooling pipes 4 ′ are installed on all outer sides of the riser.
  • the melt that is drawn off runs over the overflow 17 onto a plate belt 20 and is conveyed upwards by the latter.
  • the melt solidifies into small glass bodies that e.g. are reusable as ballast or concrete aggregate.
  • a second outlet can be provided as a simple branch channel at the level of the surface of the melt 14 either parallel to the melt overflow 17 or at another location in the basin 1.
  • the protective layer 2 may leak over time if it runs for a long time.
  • the melt solidifies at the latest in the vicinity of the cooling pipes 4, so that no further erosion of the ground 3 can then be expected. This means that repair work is only necessary at the outlet.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Processing Of Solid Wastes (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

The oven described has a vessel designed to hold a melt, a cover over the vessel, a feed device for the mixture to be melted and electrodes extending down from above into the melt. The oven is characterized in that the vessel (1) is sunk into the earth (3).

Description

ONDERE STAUBE AUS OFEN ZUM VERGLASEN VON ABFALLEN, ST VERBRENNUNGSANLAGEN UNOTHER DUST FROM OVEN FOR GLAZING WASTE, ST COMBUSTION PLANTS AND

Beschreibung:Description:

erglasen von Ab- 10 Die Erfindung betrifft einen Ofen nungsanlagen und faulen, insbesondere Stäube aus V enden Becken, mit Asbest , mit einem eine Schmelze e iner Beschickungs¬ einer darüber angeordneten Decke, nge und mit von einrichtung für das zu schmelzend n. 15 oben in die Schmelze ragenden EleThe invention relates to a furnace and rotten furnace, in particular dusts from vend basins, with asbestos, with a melt and a blanket arranged above it, with a length and with a device for the n. 15 to be melted above Ele. protruding into the melt

0 118 580 AI be¬ Ein derartiger Ofen ist z.B. in d ieh weitgehend an schrieben. Er weist den Nachteil zöfen anzulehnen, die Technologie der üblichen Glas re Feυerfest-Ma- 20 die aus hochwertigem und damit se inen Stahlmantel, teria] bestehen. Er braucht weite wendigen Energie¬ der außen gekühlt wird, wodurch d och werden. Der kosten für den Betrieb des Ofens massiven Oberbau bekannte Ofen weist darüberhinau chtung trägt. Die 25 auf, der eine komplizierte Einle ig, so daß die Gesamtanlagen sind entsprechend glasen von Abfäl- Kosten des Gesamtverfahrens für sten einer sol- len sehr stark durch die Investi nüber einer Depo- chen Anlage mitbestimmt werden u0 118 580 AI be¬ Such an oven is e.g. largely wrote to you. It has the disadvantage of leaning against the technology of the usual glass refractory materials, which consist of high-quality and thus a steel shell, teria]. It needs a wide range of manoeuvrable energy which is cooled on the outside, which means that The cost of operating the kiln massive superstructure also shows caution. The 25 on, which is a complicated single-entry system, so that the entire plants are correspondingly glazed by waste costs of the overall process for most of them should be determined to a large extent by the investors via a depot plant

30 nierung als hoch zu gelten haben.30 must be considered high.

inen einfachen Aufgabe der Erfindung ist es des n Ofen der ein- und mit geringem Aufwand herzust er mit geringen gangs genannten Art zu schaffen, Diese Aufgabe wird bei dem eingangs genannten Ofen da¬ durch gelöst, daß dessen Becken in den Erdboden eingelas¬ sen ist. Hierdurch wird eine äußerst einfache und kosten¬ günstige Ofenkonstruktion erreicht.A simple object of the invention is to produce the n furnace of one type and with little effort, with a small number of gears mentioned, This object is achieved in the oven mentioned at the outset by the fact that its basin is embedded in the ground. In this way, an extremely simple and inexpensive furnace construction is achieved.

Vorteilhaft können mindestens die Wände des Beckens aus einer Schutzschicht bestehen. Dies ist insbesondere dann zweckmäßig, wenn der Erdboden nicht schon aus einem schwer schmelzenden Naturgestein besteht.At least the basin walls can advantageously consist of a protective layer. This is particularly useful if the ground does not already consist of a hard-melting natural rock.

Weitere vorteilhafte Ausgestaltungen des erfindungsge¬ mäßen Ofens sind in den Unteransprüchen 3 bis 11 angege¬ ben.Further advantageous refinements of the furnace according to the invention are specified in subclaims 3 to 11.

Im folgenden werden zwei Ausführungsbeispiele der Erfin¬ dung anhand einer Zeichnung beschrieben. Die Figuren der Zeichnung zeigen:Two exemplary embodiments of the invention are described below with reference to a drawing. The figures in the drawing show:

Figur 1 einen Ofen in einer ersten Ausführung im Verti- kaischnitt und1 shows a furnace in a first embodiment in vertical section and

Figur 2 den Ofen in einer zweiten Ausführung ebenfalls im Vertikalschnitt.Figure 2 shows the oven in a second embodiment also in vertical section.

Gemäß Figur 1 besteht der Ofen aus einem auf einem dazu geeigneten Gelände ausgehobenen, in den Erdboden 3 einge¬ lassenen Becken 1. Dieses Becken 1 ist an den Seitenwän¬ den und im unteren waagerechten Teil mit einer Schutz¬ schicht 2 aus Feuerbeton ausgekleidet. Anstelle von Feuerbeton kann an dieser Stelle auch schwer schmelzen¬ des Naturgestein, wie Granit oder dergleichen, einge¬ setzt werden. Ist eine solche Schutzschicht aus geologi¬ schen Gründen nicht erforderlich, z.B. weil der Erdboden 3 schon aus einem schwer schmelzenden Naturgestein be- steht, so kann das Becken 1 auch nur von einem Fundament 2a für- die Aufbauten umgeben sein. Die Umrißform des Beckens 1 ist bevorzugt rund oder vieleckig. Als Decke weist das Becken 1 eine einfache Stahlblechhau¬ be 5 auf, wobei das Fundament in Form eines Feuerbeton¬ streifens 2a am Beckenrand die Auflage für die Haube 5 bildet.According to FIG. 1, the furnace consists of a basin 1 excavated on a suitable site and embedded in the ground 3. This basin 1 is lined with a protective layer 2 of refractory concrete on the side walls and in the lower horizontal part. Instead of refractory concrete, hard-melting natural rock, such as granite or the like, can also be used at this point. If such a protective layer is not necessary for geological reasons, for example because the ground 3 already consists of a hard-melting natural rock, the basin 1 can also be surrounded only by a foundation 2a for the structures. The outline shape of the basin 1 is preferably round or polygonal. The basin 1 has a simple sheet steel hood 5 as the ceiling, the foundation in the form of a fire-concrete strip 2a forming the support for the hood 5 at the edge of the basin.

In der Mitte der Stahlblechhaube 5 ist ein Innenrohr 6 angebracht, an welchem ein Eingaberohr 7 teleskopierend angebracht ist, welches durch eine Verstellstange 8 im Zentrum der Rohre 6, 7 in der Höhe verstellbar ist. In das Innenrohr 6 mündet oben eine Förderschnecke 9, mit welcher das einzuschmelzende Gemenge aus einem Bunker 10 in den Ofen gefördert wird.In the middle of the steel sheet hood 5, an inner tube 6 is attached, to which an input tube 7 is attached telescopically, which is adjustable in height by an adjusting rod 8 in the center of the tubes 6, 7. In the inner tube 6, a screw conveyor 9 opens at the top, with which the batch to be melted is conveyed from a bunker 10 into the furnace.

Die Haube 5 besitzt darüberhinaus einen Abgasstutzen 11, welcher zu einer nicht gezeigten Rauchgasreinigungsanla- ge führt. Außerdem weist die Haube 5 konzentrisch um den Mittelpunkt angeordnete, winkelverstellbare Elektroden¬ durchführungen 12 auf, durch welche Elektroden 13 in das Innere des Beckens 1 und in eine darin befindliche Schmelze 14 eingeführt sind. Die Elektroden 13 werden in üblicher Weise von einem Ofentransformator mit elektri¬ scher Energie gespeist und können bei Bedarf verlängert und nachgeschoben werden.The hood 5 also has an exhaust pipe 11, which leads to a flue gas cleaning system, not shown. In addition, the hood 5 has concentrically arranged, angularly adjustable electrode bushings 12 through which electrodes 13 are inserted into the interior of the basin 1 and into a melt 14 located therein. The electrodes 13 are supplied with electrical energy from a furnace transformer in the usual manner and can be extended and replenished if necessary.

Das Gemenge wird über die Schnecke 9 in das Innenrohr 6 eingeführt, fällt nach unten und bildet eine auf der Schmelze 14 schwimmende Gemengedecke 18. Das untere Ende des Eingaberohres 7 wird in der Höhe so eingestellt, daß der natürliche Böschungswinkel des Gemenges zu einer vollständigen Bedeckung der Oberfläche der Schmelze 14 innerhalb des Beckens 1 führt. Durch Höherstellen des Eingaberohres 7 kann die Dicke der Gemengedecke 18 ver¬ größert und damit die Temperatur des Abgases reduziert werden.The batch is introduced into the inner tube 6 via the screw 9, falls downward and forms a batch blanket 18 floating on the melt 14. The lower end of the input tube 7 is adjusted in height so that the natural slope angle of the batch is completely covered the surface of the melt 14 leads within the basin 1. By increasing the input tube 7, the thickness of the batch cover 18 can be increased and thus the temperature of the exhaust gas can be reduced.

Um bei■ einer Störung, welche zu einem Durchschmelzen der Gemengedecke 18 führen könnte, keine zu hohe Temperatur an der Haube 5 zu bekommen, ist am oberen Ende der Haube 5 eine Ringleitung 19 installiert, welche mit Düsen be¬ stückt ist, so daß im Bedarfsfall die Haube 5 von oben mit Wasser gekühlt werden kann. Die Wassermenge kann da- bei so bemessen werden, daß das Wasser verdampft, bevor es auf dem unteren Teil der Haube 5 ankommt, wodurch die Temperatur des die Haube 5 bildenden Metalls knapp über 100°C gehalten werden kann.In the event of a fault which could lead to the melting of the batch cover 18, the temperature is not too high to get on the hood 5, a ring line 19 is installed at the upper end of the hood 5, which is equipped with nozzles, so that the hood 5 can be cooled from above with water if necessary. The amount of water can be such that the water evaporates before it reaches the lower part of the hood 5, whereby the temperature of the metal forming the hood 5 can be kept just above 100 ° C.

Während des Betriebes des Ofens kann unter Umständen die Schutzschicht 2 mit der Zeit undicht werden. Spätestens in der kühlen Umgebung des Beckens 1 wird die Schmelze jedoch erstarren und dadurch selbst abdichten, so daß dann keine weitere Erosion des Erdbodens 3 mehr zu erwar¬ ten ist. Damit sind Reparaturarbeiten nicht erforder¬ lich.Under certain circumstances, the protective layer 2 may leak during operation of the furnace. However, the melt will solidify and thereby seal itself at the latest in the cool environment of the basin 1, so that no further erosion of the ground 3 can then be expected. Repair work is therefore not necessary.

Wenn das Becken 1 vollständig mit Schmelze 14 gefüllt, also vollgeschmolzen ist, wird die Energiezuführung durch die Elektroden 13 beendet und die Schmelze 14 imWhen the basin 1 is completely filled with melt 14, that is to say it is fully melted, the energy supply through the electrodes 13 is ended and the melt 14 in

Becken 1 erstarrt zu einem festen Glaskörper, der an Ort und Stelle verbleibt. Da der Glaskörper weitestgehend be¬ ständig ist gegen chemische Angriffe, kann der Glaskör¬ per ohne Gefahr für die Umwelt und das Grundwasser im Erdboden belassen werden.Basin 1 solidifies into a solid vitreous body that remains in place. Since the vitreous body is largely resistant to chemical attacks, the vitreous body can be left in the ground without any risk to the environment and groundwater.

Die relativ leichte Haube 5 mit den Einrichtungen 6, 7, 8, 9, 10 für die Gemengezuführung kann nach dem Voll¬ schmelzen des Beckens 1 sehr schnell abgebaut und an ei- ner anderen Stelle wieder aufgebaut werden, so daß der Ofen insbesondere bei Bodensanierungsmaßahmen dem Fort¬ schritt der Arbeit folgen kann.The relatively light hood 5 with the devices 6, 7, 8, 9, 10 for the batch feed can be dismantled very quickly after the basin 1 has completely melted and can be reassembled at another location, so that the furnace is particularly suitable for soil remedial measures can follow the progress of the work.

Gemäß Figur 2 besteht auch der hier dargestellte Ofen aus einem im Erdboden 3 liegenden Becken 1. Dieses Becken.1 ist hier nur an den Seitenwänden mit einer Schutzschicht 2 aus Feυerbeton ausgekleidet. Auf einem Kreisbogen, der bevorzugt einen Abstand von ca. 1 m von der Innenkante des Beckens 1 besitzt, sind ca. 2 m tiefe Löcher gebohrt, in welche Kühlrohre 4 ein¬ gesetzt sind. Diese Kühlrohre 4 werden mit Wasser beauf- schlagt und sind vorzugsweise in Serie geschaltet. Sie dienen zur Kühlung des Erdbodens 3 in der Umgebung des Beckens 1, um ein Schmelzen des Erdbodens 3 zu verhin¬ dern.According to FIG. 2, the furnace shown here also consists of a basin 1 lying in the ground 3. This basin. 1 is here only lined with a protective layer 2 of fire concrete on the side walls. On a circular arc, which is preferably at a distance of approximately 1 m from the inner edge of the basin 1, holes approximately 2 m deep are drilled into which cooling tubes 4 are inserted. These cooling tubes 4 are charged with water and are preferably connected in series. They serve to cool the ground 3 in the vicinity of the basin 1 in order to prevent the ground 3 from melting.

Als Decke weist das Becken 1 auch hier eine Stahlblech¬ haube 5 auf, wobei als Widerlager für die Haube 5 die oberirdischen Enden der Kühlrohre 4 dienen und wobei wie¬ der ein Feuerbetonstreifen 2a am Beckenrand die Auflage für die Haube 5 bildet. Im übrigen entsprechen die Haube 5 und die daran angeordneten Teile 6 bis 13 denen des Ausführungsbeispieles nach Figur 1 und es wird auf die dort gegebene Beschreibung verwiesen.As a ceiling, the basin 1 also has a sheet steel hood 5, the aboveground ends of the cooling pipes 4 serving as abutments for the hood 5, and a fire-reinforced concrete strip 2a forming the support for the hood 5 at the pool edge. Otherwise, the hood 5 and the parts 6 to 13 arranged thereon correspond to those of the exemplary embodiment according to FIG. 1, and reference is made to the description given there.

Im Unterschied zum Ofen nach Figur 1 ist bei dem Ofen nach Figur 2 zusätzlich zum Abzug von Schmelze 14 einIn contrast to the furnace according to FIG. 1, the furnace according to FIG. 2 also has a melt 14 removed

Auslauf vorgesehen. Der Auslauf wird durch einen Durch¬ laß 15 und einen Riser 16, welcher in einen Überlauf 17 übergeht, gebildet. Der Riser 16 wird mit einer Tauch¬ elektrode 13' beheizt, die elektrisch gegen eine der Elektroden 13 im Becken 1 geschaltet ist.Spout provided. The outlet is formed by a passage 15 and a riser 16 which merges into an overflow 17. The riser 16 is heated by an immersion electrode 13 'which is electrically connected to one of the electrodes 13 in the basin 1.

Um eine lange Lebensdauer des Durchlasses 15, des Risers 16 und des Überlaufs 17 zu gewährleisten, sind an allen Außenseiten des Risers 16 Kühlrohre 4' installiert. Die abgezogene Schmelze läuft über den Überlauf 17 auf ein Plattenband 20 und wird von diesem nach oben befördert. Dabei erstarrt die Schmelze zu kleinen Glaskörpern, die z.B. als Schotter oder Betonzuschlagstoff weiterverwend¬ bar sind.In order to ensure a long service life of the passage 15, the riser 16 and the overflow 17, cooling pipes 4 ′ are installed on all outer sides of the riser. The melt that is drawn off runs over the overflow 17 onto a plate belt 20 and is conveyed upwards by the latter. The melt solidifies into small glass bodies that e.g. are reusable as ballast or concrete aggregate.

Wenn aufgrund der Zusammensetzung des einzuschmelzenden Gemenges eine Glasgalleschicht zu erwarten ist, kann ein zweiter Auslauf als einfacher Stichkanal in der Höhe der Oberfläche der Schmelze 14 entweder parallel zum Schmel¬ zeüberlauf 17 oder an einer anderen Stelle des Beckens 1 vorgesehen werden.If, due to the composition of the batch to be melted down, a layer of glass gall is to be expected, a second outlet can be provided as a simple branch channel at the level of the surface of the melt 14 either parallel to the melt overflow 17 or at another location in the basin 1.

Während des Betriebes des Ofens kann bei längerer Lauf¬ zeit die Schutzschicht 2 mit der Zeit leck werden. Spä¬ testens in der Nähe der Kühlrohre 4 wird die Schmelze jedoch erstarren, so daß dann keine weitere Erosion des Erdbodens 3 mehr zu erwarten ist. Damit sind Reparatur¬ arbeiten höchstens am Auslauf erforderlich.When the furnace is in operation, the protective layer 2 may leak over time if it runs for a long time. However, the melt solidifies at the latest in the vicinity of the cooling pipes 4, so that no further erosion of the ground 3 can then be expected. This means that repair work is only necessary at the outlet.

Ersichtlicherweise sind die Investitions- und die Repara¬ turkosten der vorangehend beschriebenen Öfen erheblich niedriger als bei den bisher bekannten Öfen, so daß mit der Erfindung kostengünstige und umweltfreundliche Mög¬ lichkeiten zum Verglasen von Abfällen geschaffen werden. Obviously, the investment and the repair costs of the furnaces described above are considerably lower than in the previously known furnaces, so that the invention creates inexpensive and environmentally friendly options for vitrifying waste.

Claims

P a t e n t a n s p r ü c h eP a t e n t a n s r u c h e l. Ofen zum Verglasen von Abfällen, insbesondere Stäube aus Verbrennungsanlagen und Asbest, mit einem eine Schmelze enthaltenden Becken, mit einer darüber angeordneten Decke, m t einer Beschickungseinr ch¬ tung für das zu schmelzende Gemenge und mit von oben in die Sch ele ragenden Elektroden, d a d u r c h g e k e n n z e i c h n e t , daß das Becken (1) in den Erdboden (3) eingelassen ist.l. Furnace for vitrifying waste, in particular dusts from incineration plants and asbestos, with a basin containing a melt, with a ceiling arranged above it, with a loading device for the batch to be melted and with electrodes protruding into the bowl from above, characterized in that that the basin (1) is embedded in the ground (3). 2. Ofen nach Anspruch 1, dadurch gekennzeichnet, daß mindestens die Wände des Beckens (1) aus einer Schutzschicht (2) bestehen.2. Oven according to claim 1, characterized in that at least the walls of the basin (1) consist of a protective layer (2). 3. Ofen nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß im Abstand rings um das Becken (1) Kühlrohre (4) im Erdboden (3) angeordnet sind.3. Oven according to claim 1 or 2, characterized in that cooling tubes (4) are arranged in the ground (3) at a distance around the basin (1). 4. Ofen nach einem der Ansprüche 1 bis 3, dadurch ge¬ kennzeichnet, daß die Decke aus einer Stahlblechhau- be (5) besteht.4. Oven according to one of claims 1 to 3, characterized ge indicates that the ceiling consists of a sheet steel hood (5). 5. Ofen nach Anspruch 4, dadurch gekennzeichnet, daß das Becken (1) von einem Fundament (2a) für die Stahlblechhaube (5) umgeben ist.5. Oven according to claim 4, characterized in that the basin (1) is surrounded by a foundation (2a) for the sheet steel hood (5). Ofen nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß er zur Einstellung einer die Stahlblechhaube (5) kühlhaltenden Gemengedecke (18) in Form eines Schütt¬ kegels ein höhenverstellbares zentrales Eingaberohr (7) für das Gemenge aufweist.Oven according to claim 4 or 5, characterized in that it is used to adjust a sheet steel hood (5) cooling blanket (18) in the form of a pouring cone has a height-adjustable central input tube (7) for the batch. 7. Ofen nach Anspruch 6, dadurch gekennzeichnet, daß das Eingaberohr (7) an einem Innenrohr (6) telesko- pierend angebracht ist, wobei das Innenrohr (6) mit der Stahlblechhaube (5) verbunden ist.7. Oven according to claim 6, characterized in that the input tube (7) is telescopically attached to an inner tube (6), the inner tube (6) being connected to the sheet steel hood (5). 8. Ofen nach einem der Ansprüche 1 bis 7, dadurch ge¬ kennzeichnet, daß zur Abführung der Schmelze ein Riser (16) mit einer Taυchelektrode (13') und ein daran anschließender Überlauf (17) vorhanden sind.8. Furnace according to one of claims 1 to 7, characterized ge indicates that a riser (16) with a dip electrode (13 ') and an adjoining overflow (17) are provided for removing the melt. 9. Ofen nach Anspruch 8, dadurch gekennzeichnet, daß beidseitig neben dem Riser (16) und/oder Überlauf (17) weitere Kühlrohre (4') angeordnet sind.9. Oven according to claim 8, characterized in that further cooling tubes (4 ') are arranged on both sides next to the riser (16) and / or overflow (17). 10. Ofen nach einem der Ansprüche 4 bis 9, dadurch ge- kennzeichnet, daß eine über einen Abgasstutzen (11) an die Stahlblechhaube (5) angeschlossene Abgasrei¬ nigungseinrichtung vorhanden ist.10. Oven according to one of claims 4 to 9, characterized in that an exhaust gas cleaning device connected to the steel sheet hood (5) is provided via an exhaust pipe (11). 11. Ofen nach einem der Ansprüche 4 bis 10, dadurch ge- kennzeichnet, daß auf der Oberfläche der Stahlblech¬ haube (5) eine Ringleitung (19) zur Notkühlung der Stahlblechhaube (5) angeordnet ist. 11. Oven according to one of claims 4 to 10, character- ized in that a ring line (19) for emergency cooling of the steel sheet hood (5) is arranged on the surface of the Stahlblech¬ hood (5).
PCT/EP1992/001686 1992-05-29 1992-07-23 Oven for the vitrification of waste, in particular incinerator-plant and asbestos dusts Ceased WO1993024420A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL92302306A PL302306A1 (en) 1992-05-29 1992-07-23 Furnace for vitrification of solid wastes in particular of dust from combusting appliances and asbestos dust
EP92916185A EP0596951A1 (en) 1992-05-29 1992-07-23 Oven for the vitrification of waste, in particular incinerator-plant and asbestos dusts
SK94-94A SK9494A3 (en) 1992-05-29 1992-07-23 Oven for the vitrification of waste, in particular incinerator-plant and asbestos dusts

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4217854A DE4217854C2 (en) 1992-05-29 1992-05-29 Furnace for vitrifying waste, in particular dust from incinerators and asbestos
DEP4217854.1 1992-05-29

Publications (1)

Publication Number Publication Date
WO1993024420A1 true WO1993024420A1 (en) 1993-12-09

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PCT/EP1992/001686 Ceased WO1993024420A1 (en) 1992-05-29 1992-07-23 Oven for the vitrification of waste, in particular incinerator-plant and asbestos dusts

Country Status (7)

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EP (1) EP0596951A1 (en)
CZ (1) CZ17294A3 (en)
DE (1) DE4217854C2 (en)
HU (1) HUT67494A (en)
PL (1) PL302306A1 (en)
SK (1) SK9494A3 (en)
WO (1) WO1993024420A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996004209A1 (en) * 1994-08-03 1996-02-15 Battelle Memorial Institute Method and apparatus for waste vitrification
EP1451515A4 (en) * 2001-09-25 2011-08-10 Geosafe Corp Apparatus and method for vitrification of contaminated soil or waste

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ306605B6 (en) * 2016-01-22 2017-03-22 Výzkumný ústav stavebních hmot, a.s. How to use asbestos cement waste

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DE9518C (en) * C. EMMEL in Hoerde (Westfalen) Glass melting furnace with air heating
DE69687C (en) * G. FlEGE in Stralau, Dorfstr. 10II Glass melting tank with air heating channels on the tank bottom
EP0118580A1 (en) * 1983-03-15 1984-09-19 Sorg GmbH & Co. KG Electric smelt furnace for aggressive mineral products with an inclined viscosity curve

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DE4113182C1 (en) * 1991-04-23 1992-08-06 Beteiligungen Sorg Gmbh & Co Kg, 8770 Lohr, De Furnace for vitrifying wastes - has tank sunk into the ground and cooling pipes arranged at a distance from the tank, has simple an inexpensive construction and installation

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DE9518C (en) * C. EMMEL in Hoerde (Westfalen) Glass melting furnace with air heating
DE69687C (en) * G. FlEGE in Stralau, Dorfstr. 10II Glass melting tank with air heating channels on the tank bottom
EP0118580A1 (en) * 1983-03-15 1984-09-19 Sorg GmbH & Co. KG Electric smelt furnace for aggressive mineral products with an inclined viscosity curve

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996004209A1 (en) * 1994-08-03 1996-02-15 Battelle Memorial Institute Method and apparatus for waste vitrification
EP1451515A4 (en) * 2001-09-25 2011-08-10 Geosafe Corp Apparatus and method for vitrification of contaminated soil or waste

Also Published As

Publication number Publication date
HUT67494A (en) 1995-04-28
DE4217854C2 (en) 1995-06-22
HU9400260D0 (en) 1994-05-30
CZ17294A3 (en) 1995-07-12
SK9494A3 (en) 1994-06-08
EP0596951A1 (en) 1994-05-18
DE4217854A1 (en) 1993-12-02
PL302306A1 (en) 1994-07-11

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