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EP1407209A1 - Dispositif et procede de fusion et/ou de vitrification de poussieres de filtres - Google Patents

Dispositif et procede de fusion et/ou de vitrification de poussieres de filtres

Info

Publication number
EP1407209A1
EP1407209A1 EP02760185A EP02760185A EP1407209A1 EP 1407209 A1 EP1407209 A1 EP 1407209A1 EP 02760185 A EP02760185 A EP 02760185A EP 02760185 A EP02760185 A EP 02760185A EP 1407209 A1 EP1407209 A1 EP 1407209A1
Authority
EP
European Patent Office
Prior art keywords
dust
melting
melting unit
head space
melted
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.)
Withdrawn
Application number
EP02760185A
Other languages
German (de)
English (en)
Inventor
Heinz-Dieter Forjahn
Johannes Vetter
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.)
Air Liquide Deutschland GmbH
Original Assignee
Messer Griesheim GmbH
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 Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of EP1407209A1 publication Critical patent/EP1407209A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals
    • 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
    • C03B5/12—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in shaft furnaces
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/28—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity for treating continuous lengths of work
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/20—Combustion to temperatures melting waste
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/30—Solid combustion residues, e.g. bottom or flyash
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • F27B2009/124—Cooling
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/08—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated through chamber walls
    • F27B9/082—Muffle furnaces
    • 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
    • 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
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

  • the invention relates to a device and a method for melting filter dusts.
  • the object of the present invention is therefore to create a possibility for melting filter dusts in which the unintentional leakage of filter dust is largely avoided.
  • the invention makes use of the construction principle of a device for melting glass known from WO 97/05440.
  • This device comprises a melting unit in the form of a tube, which is provided with a gas-tight and fireproof jacket.
  • the - usually ceramic - material from which the jacket of the tube is made depends on the raw material to be melted down, and is selected in such a way that reactions between the jacket material and the raw material to be melted down are reduced to a minimum.
  • the tube has one in its upper face Add opening in which the raw material is added. An outlet opening for discharging the melt is provided in a lower region.
  • the known melting unit is housed concentrically in an insulated steel container.
  • the annular space between the insulation of the container and the ceramic tube forms the combustion chamber in which the heat required for the melting process is generated by burning a gas, preferably natural gas.
  • a gas preferably natural gas.
  • the material to be melted is thus fired indirectly.
  • the exhaust gases generated during the combustion process are discharged via an exhaust pipe leading from the combustion chamber and do not come into contact with the melt or the raw material.
  • a dustproof, lockable head space is also placed on the addition opening of the essentially vertically arranged melting unit, into which the dusty additives to be melted are introduced. Under the influence of gravity, the dust particles gradually sink into the melting unit and are melted. The melt gradually sinks into the lower area of the melting unit until it is discharged at the outlet opening. Even light dust particles sink into the melting unit after a certain period of time and do not enter the surrounding atmosphere.
  • a preferred embodiment of the invention provides for the melting unit to be conical, the melting unit tapering towards the outlet opening.
  • This embodiment is particularly recommended because the volume of the particles added decreases with increasing melting.
  • it is expedient to make the head space conical or funnel-shaped, it tapering towards the addition opening. As a result, a larger amount of material to be fused can be taken up.
  • a lock arrangement upstream of the head space through which the dust-like additives are introduced can be, for example, a correspondingly sealed screw.
  • a particularly reliable sealing and therefore preferred lock arrangement is a cellular wheel lock.
  • the object of the invention is also achieved with a method for melting filter dusts with the features of claim 6.
  • dust-like additives which are fed to a melting unit and melted by the action of heat from a heating device which is thermally connected to the melting unit are, before melting, fed to a dust-proof head space placed on the melting unit, in which the dusty additives collect and finally under the effect of gravity sink into the melting unit.
  • the additives in the headspace are advantageously subjected to a pressure which is greater than the ambient pressure at the outlet opening of the melting unit. There is a pressure drop along the melting unit, which additionally supports the process of gravity lowering and compression of the particles.
  • the excess pressure can be built up mechanically, for example by a press built into the head space or by supplying a gas under pressure into the head space. Typical pressure values are between about 100 mbar and a few bar.
  • an inert gas for example nitrogen, before or during the addition of the addition substances.
  • the inert gas can also be used to build up the above-mentioned excess pressure in the head space.
  • the simultaneous addition of glass formers, for example SiO 2 , into the head space is particularly advantageous.
  • the glass former - expediently likewise used in the form of small particles - mixes with the dust-like additives. After the melt solidifies, a glass is formed in which the added substances are enclosed. This embodiment of the method according to the invention is particularly advantageous for the disposal of contaminated filter dusts.
  • FIG. 1 shows schematically the structure of a device according to the invention for melting and / or glazing filter dusts in cross section.
  • the melting furnace 1 shown in FIG. 1 comprises an essentially tubular, vertically operated melting unit 2, which is accommodated concentrically in the interior of an essentially cylindrical combustion chamber 3. On its upper end face, the melting unit 2 is provided with an addition opening 4 for feeding raw material to be melted. The addition opening 4 is preceded by a funnel-shaped head space 5 for receiving the dust-like additives to be melted. The head space 5 is sealed against dust and pressure in relation to the ambient atmosphere. New addition substances are continuously fed into the melting unit 2 from the head space 5 without the thermal or chemical conditions inside the melting unit 2 being caused by penetrating outside air and the like. the like. be disturbed sustainably.
  • the melting unit 2 has an outlet opening 6 for discharging the melt formed in the melting unit 2.
  • an outlet nozzle 8 Arranged at the outlet opening 6 is an outlet nozzle 8 made of a material which is highly thermally conductive and chemically inert, such as platinum, and which is thermally connected to a heating device 7. By heating the outlet nozzle 8 can ensure that the material located within the outlet nozzle 8 is in the molten, ie flowable state.
  • the wall 9 of the melting unit 2 consists of a heat-resistant and gas-tight, for example ceramic or metallic material.
  • the material used depends on the type and composition of the substance to be melted down. In particular, the material of the wall 9 should be such that it does not react as much as possible with the melt formed in the interior of the melting unit 2.
  • a fuel feed 12 for gaseous fuel, for example natural gas, and a multiplicity of injection nozzles 13 for oxygen are passed through the wall 11 of the combustion chamber 3 provided with an insulating layer 10.
  • the injection nozzles 13 are arranged all around at regular angular intervals and in several rows one above the other.
  • a gas discharge line 14 is provided to discharge the exhaust gas formed during the combustion.
  • the fuel introduced through the fuel supply 12 is burned with the oxygen added through the injection nozzles 13.
  • the amount of oxygen supplied from the injection nozzles 13 to a row can be set separately, a total amount of oxygen corresponding to the stoichiometric conditions being supplied. This procedure enables the setting of a temperature profile advantageous for the melting process over the height of the melting unit 2.
  • the dust-like addition substances intended for melting and / or glazing are supplied to the head space 5 via the feed line 15 and a lock arrangement 14.
  • the lock arrangement 16 is preferably a cellular wheel lock which can be sealed very well. If the glazing of the dust-like additives is intended, a glass former is also added, either via the feed line 15 or via a separate opening (not shown here) provided with a dust-tight lock.
  • the dust-like additives introduced into the head space 5 sink to the addition opening 4 after a certain time and thus reach the melting unit 2, in which they pass through the combustion chamber 3 generated heat are melted up to the level of a melting mirror 17. Above the melting level, the added substances are still in a solid form, ie in dust form.
  • the head space 4 via the pressure line 18 with a compressed gas supply for an inert gas, for example nitrogen, in flow connection.
  • an inert gas for example nitrogen
  • Melting unit 2 an additional pressure drop of 100 to 3000 mbar, which on the one hand compresses the still solid dust particles, and on the other hand increases the speed when the additives to be melted pass through the melting unit 2.
  • the melted addition substances emerge in liquid form at the outlet nozzle 6, the heating device 7 preventing premature solidification in the interior of the outlet nozzle. After it has solidified, the melted material has a volume which is considerably less than the volume of its dust form and can be disposed of more easily or recycled. If glass formers have been added to the dust-like additives, a glass is formed after the melt has solidified, in which the additives are enclosed.
  • the melting furnace 1 is compact and flexible in use and is characterized by a high level of economy compared to conventional crucible furnaces. By separating the melting and combustion chamber for the
  • Insulating layer 10 of the combustion chamber 3 a simple and inexpensive insulating compound can be selected. Since the exhaust gas from the combustion chamber 3 does not come into contact with the melt in the melting unit 2, it consists of approximately 100% carbon dioxide and water vapor when natural gas is burned.
  • the melting furnace 1 can be used both continuously and in batch mode. LIST OF REFERENCES

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processing Of Solid Wastes (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

La fusion de fines poussières de filtres dans des fours à creuset et à induction classiques génère de nouveaux empoussiérages d'un niveau trop élevé. Une compression des poussières est par ailleurs très complexe et désormais impossible. Selon la présente invention, les poussières de filtres sont recueillies dans un espace de tête étanche aux poussières situé en amont de l'ouverture d'apport d'un groupe de fusion relié thermiquement à une chambre de combustion. Les particules de poussière situées dans cet espace de tête tombent sous l'effet de la gravité à l'intérieur dudit groupe de fusion, où ces particules sont fondues. On peut renforcer ce phénomène en produisant une différence de pression supplémentaire le long du groupe de fusion. Une décharge des poussières est ainsi largement évitée. Le présent procédé convient également à la vitrification de poussières particulièrement contaminées.
EP02760185A 2001-07-07 2002-06-18 Dispositif et procede de fusion et/ou de vitrification de poussieres de filtres Withdrawn EP1407209A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10133056 2001-07-07
DE10133056A DE10133056B4 (de) 2001-07-07 2001-07-07 Verfahren zum Einschmelzen und/oder Verglasen von Filterstäuben und Verwendung einer Vorrichtung dafür
PCT/EP2002/006712 WO2003006906A1 (fr) 2001-07-07 2002-06-18 Dispositif et procede de fusion et/ou de vitrification de poussieres de filtres

Publications (1)

Publication Number Publication Date
EP1407209A1 true EP1407209A1 (fr) 2004-04-14

Family

ID=7691008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02760185A Withdrawn EP1407209A1 (fr) 2001-07-07 2002-06-18 Dispositif et procede de fusion et/ou de vitrification de poussieres de filtres

Country Status (4)

Country Link
US (1) US20070277556A1 (fr)
EP (1) EP1407209A1 (fr)
DE (1) DE10133056B4 (fr)
WO (1) WO2003006906A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11358895B2 (en) 2018-11-15 2022-06-14 Owens-Brockway Glass Container Inc. Batch charger for a melting chamber

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE626966A (fr) * 1962-01-29
DE1211766B (de) * 1962-06-25 1966-03-03 Patra Patent Treuhand Herstellung von blasenarmem Quarzrohr
US3656924A (en) * 1969-11-17 1972-04-18 Owens Illinois Inc Apparatus and methods for melting glass compositions for glass laser rods
US4430109A (en) * 1981-03-16 1984-02-07 Corning Glass Works Method of regulating fuel and air flow to a glass melting furnace
EP0087409A1 (fr) * 1981-08-24 1983-09-07 CARMAN, Justice N. Dispositif de four pour la fabrication de verre
DE3613894A1 (de) * 1986-04-24 1987-10-29 Fuji Electric Co Ltd Giessofen der tiegelbauart und giessverfahren
DE4112162C1 (fr) * 1991-04-13 1992-07-30 Beteiligungen Sorg Gmbh & Co Kg, 8770 Lohr, De
US5599182A (en) * 1995-07-26 1997-02-04 Xothermic, Inc. Adjustable thermal profile heated crucible method and apparatus
IT1304475B1 (it) * 1998-08-06 2001-03-19 Sacmi Procedimento ed impianto per la produzione di vetro ed in particolaredi fritte ceramiche.
DE19846805A1 (de) * 1998-10-10 2000-04-13 Clemens Kiefer Verfahren und Vorrichtung zur Vergasung und Verbrennung
DE10060729A1 (de) * 2000-12-07 2002-06-20 Messer Griesheim Gmbh Schmelzofen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03006906A1 *

Also Published As

Publication number Publication date
WO2003006906A1 (fr) 2003-01-23
DE10133056A1 (de) 2003-01-23
DE10133056B4 (de) 2009-09-10
US20070277556A1 (en) 2007-12-06

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