FR2736419A1 - Incineration or processing of waste by RF or microwave heating - has material to be processed in reactor vessel containing two electrodes coupled to source of radio-frequency or microwave energy - Google Patents
Incineration or processing of waste by RF or microwave heating - has material to be processed in reactor vessel containing two electrodes coupled to source of radio-frequency or microwave energy Download PDFInfo
- Publication number
- FR2736419A1 FR2736419A1 FR9508210A FR9508210A FR2736419A1 FR 2736419 A1 FR2736419 A1 FR 2736419A1 FR 9508210 A FR9508210 A FR 9508210A FR 9508210 A FR9508210 A FR 9508210A FR 2736419 A1 FR2736419 A1 FR 2736419A1
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- FR
- France
- Prior art keywords
- waste
- incineration
- radio
- frequency
- mhz
- 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.)
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Classifications
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- 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
- F23G5/10—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating electric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2202/00—Combustion
- F23G2202/70—Combustion with application of specific energy
- F23G2202/701—Electrical fields
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2204/00—Supplementary heating arrangements
- F23G2204/20—Supplementary heating arrangements using electric energy
- F23G2204/203—Microwave
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/24—Contaminated soil; foundry sand
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
La présente invention a pour objets un procédé d'incinération de déchets combustibles et son dispositif associé.Le dit dispositif, comme cela va ressortir de son descriptif, convient pour l'incinération de déchets solides et liquides présentant un faible pouvoir calorifique et notamment les sables de fonderies usagés en vue de les réutiliser ou les composites minéraux et organiques tels que les garnitures de freins d'automobiles en vue de les mettre en décharge.Il fait intervenir un champ électro-magnétique pour initier et entretenir la combustion ou la pyrolyse. The subject of the present invention is a method of incinerating combustible waste and its associated device. Said device, as will emerge from its description, is suitable for the incineration of solid and liquid waste having a low calorific value and in particular the sands used foundries for reuse or mineral and organic composites such as automobile brake linings to landfill. It uses an electro-magnetic field to initiate and maintain combustion or pyrolysis.
Selon l'art antérieur,l'incinération de déchets à faible pouvoir calorifique nécessite un apport de chaleur pour initier et entretenir la combustion ou la pyrolyse. According to the prior art, the incineration of waste with low calorific value requires an addition of heat to initiate and maintain combustion or pyrolysis.
Cet apport de chaleur est habituellement réalisé par rayonnement tel que obtenu avec des résistances électriques et/ou par convection avec des gaz chauds produits par la combustion de fuel par exemple,ou encore par conduction thermique avec les parois d'un four.Toutefois,ces techniques nécessitent de créer un intime contact entre le déchet et les gaz chauds ou les parois du four et donc de diviser le déchet et le brasser continuellement. This supply of heat is usually carried out by radiation as obtained with electrical resistances and / or by convection with hot gases produced by the combustion of fuel for example, or even by thermal conduction with the walls of an oven. techniques require creating an intimate contact between the waste and the hot gases or the walls of the furnace and therefore dividing the waste and brewing it continuously.
Dans ces conditions,deux handicaps majeurs apparaissent: -Pour les déchets contenant une forte proportion de matières inertes, le chauffage nécessaire à la combustion ou la pyrolyse concerne l'ensemble du déchet, ce qui occasionne une perte d'énergie significative. Under these conditions, two major handicaps appear: - For waste containing a high proportion of inert matter, the heating necessary for combustion or pyrolysis concerns all of the waste, which causes significant energy loss.
-Le déchet se trouve dans un four qu'il faut lui-même chauffer,ce qui occasionne là aussi des pertes d'énergie.-The waste is in an oven that must itself be heated, which again causes energy losses.
Par exemple,pour les sables de fonderies usagés,sont développés actuellement des fours à résistances électriques et à lit fluidisé.Le sable doit être d'abord broyé car il est aggloméré par des résines,pour pouvoir être maintenu en lit fluidisé . D'autre part, le four dans lequel s'effectue le brûlage des résines qui recouvrent le sable,doit être maintenu chaud,ce qui,compte tenu de son calorifugeage requiert une mise en régime longue et coûteuse. For example, for used foundry sands, electric resistance furnaces and fluidized bed ovens are currently being developed. The sand must first be ground because it is agglomerated with resins, in order to be able to be maintained in a fluidized bed. On the other hand, the oven in which the resins which cover the sand are burnt, must be kept hot, which, taking into account its insulation, requires a long and costly operation.
La présente invention permet d'éviter ces problèmes en réalisant le chauffage à coeur et préférentiel de la partie combustible du déchet par application d'un champ électro-magnétique. The present invention makes it possible to avoid these problems by carrying out the core and preferential heating of the combustible part of the waste by application of an electromagnetic field.
L'utilisation d'une énergie électro-magnétique comme les hautes fréquences (comprises entre 1 MHz et 300 MHz)et avantageusement dans la gamme 13.56 MHz ou 27MHz,ou les micro-ondes (comprises entre 300 MHz et 30 GHz)et avantageusement dans la gamme 2450 MHz ou 915 MHz,est particulièrement intéressante pour la régénération des sables de fonderies car ce déchet est constitué principalement de quartz qui est transparent au champ électrique(c'est à dire qu'il ne chauffe pas ou trés peu sous l'action du champ électro-magnétique). The use of electromagnetic energy such as high frequencies (between 1 MHz and 300 MHz) and advantageously in the range 13.56 MHz or 27MHz, or microwaves (between 300 MHz and 30 GHz) and advantageously in the 2450 MHz or 915 MHz range is particularly interesting for the regeneration of foundry sands because this waste consists mainly of quartz which is transparent to the electric field (ie it does not heat or very little under the action of the electromagnetic field).
Par contre, les résidus de résine présentent de fortes pertes sous l'action du champ électro-magnétique,ce qui conduit à leur échauffement rapide.Il suffit alors d'assurer une circulation de comburant(air ou oxygène),pour réaliser ainsi la combustion ou la pyrolyse de la résine. On the other hand, the resin residues have high losses under the action of the electromagnetic field, which leads to their rapid heating. It is then enough to ensure a circulation of oxidant (air or oxygen), to thus achieve combustion or pyrolysis of the resin.
Le sable est ainsi régénéré rapidement et à moindre coût car il n'est pas nécessaire de mettre en régime de température l'installation puisque la chaleur est transmise directement dans la résine et les pertes thermiques sont réduites au minimum. The sand is thus regenerated quickly and at a lower cost because it is not necessary to bring the system into temperature regime since the heat is transmitted directly into the resin and the heat losses are reduced to a minimum.
Un dispositif de traitement de sable de fonderies par hautes fréquences est simplement constitué d'un réacteur(l),constitué de deux électrodes(2) reliées à un générateur(3),et d'un système de traitement de fumées(4).Le réacteur proprement dit est constitué principalement des deux électrodes(2) creuses,qui peuvent être ainsi refroidies,entre lesquelles est appliqué le champ électro-magnétique.Le sable est introduit en vrac et sans broyage préalable, entre les deux électrodes. A device for treating foundry sand by high frequencies simply consists of a reactor (l), consisting of two electrodes (2) connected to a generator (3), and a smoke treatment system (4). The reactor itself consists mainly of two hollow electrodes (2), which can thus be cooled, between which the electromagnetic field is applied. The sand is introduced in bulk and without prior grinding, between the two electrodes.
L'injection de comburant est réalisée à la base du réacteur(5),sous le sable.L'extracteur (7) permet d'aspirer les fumées produites par la combustion des résines.Le laveur (4) permet d'épurer les dites fumées au cas où elles contiendraient des polluants tels que des produits à base de soufre. The injection of oxidant is carried out at the base of the reactor (5), under the sand. The extractor (7) makes it possible to suck up the fumes produced by the combustion of the resins. The washer (4) makes it possible to purify the said fumes in case they contain pollutants such as sulfur-based products.
Deux types d'installations peuvent exister: -Soit en discontinu,auquel cas le réacteur est chargé puis déchargé aprés chaque cycle de traitement; -Soit en continu, auquel cas un dispositif d'entrainement du sable,telle qu'une vis en réfractaire silico-alumineux à faibles pertes diélectriques,est disposée entre les deux électrodes. Two types of installations can exist: - Either discontinuously, in which case the reactor is loaded and then unloaded after each treatment cycle; -Either continuously, in which case a sand drive device, such as a silico-aluminous refractory screw with low dielectric losses, is placed between the two electrodes.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9508210A FR2736419B1 (en) | 1995-07-03 | 1995-07-03 | METHOD OF INCINERATION ASSISTED BY AN ELECTRO-MAGNETIC FIELD AND IMPLEMENTATION DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9508210A FR2736419B1 (en) | 1995-07-03 | 1995-07-03 | METHOD OF INCINERATION ASSISTED BY AN ELECTRO-MAGNETIC FIELD AND IMPLEMENTATION DEVICE |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2736419A1 true FR2736419A1 (en) | 1997-01-10 |
FR2736419B1 FR2736419B1 (en) | 1997-08-08 |
Family
ID=9480768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9508210A Expired - Fee Related FR2736419B1 (en) | 1995-07-03 | 1995-07-03 | METHOD OF INCINERATION ASSISTED BY AN ELECTRO-MAGNETIC FIELD AND IMPLEMENTATION DEVICE |
Country Status (1)
Country | Link |
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FR (1) | FR2736419B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003061873A1 (en) * | 2002-01-23 | 2003-07-31 | Pec Technologies Limited | A method of treating sand |
WO2016006010A1 (en) * | 2014-07-09 | 2016-01-14 | Area 45.55 S.R.L. | Method and plant for producing methane from materials containing organic carbon |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61223424A (en) * | 1985-03-28 | 1986-10-04 | Ebara Corp | Incinerating disposal of waste including plastic |
US4663507A (en) * | 1985-03-21 | 1987-05-05 | Trerice Douglas N | Method and apparatus for reduction of fly ash carbon by microwave |
FR2669553A1 (en) * | 1990-11-23 | 1992-05-29 | Fischer Ag Georg | PROCESS FOR SEPARATING BENTONITE PARTICLES AND CARBON CARRIERS FROM DUST OBTAINED BY MECHANICAL REGENERATION OF THE USE SAND. |
DE4118365A1 (en) * | 1991-06-05 | 1992-12-10 | Kuepper August Gmbh & Co Kg | Recycling of used foundry sand - by treating in a microwave furnace to volatilise, decompose or oxidise carbon@ or organic particles without effectively heating the sand |
WO1993013830A1 (en) * | 1992-01-10 | 1993-07-22 | Dupre Francoise | Process and plant for the treatment of industrial synthesized gypsum residues |
-
1995
- 1995-07-03 FR FR9508210A patent/FR2736419B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4663507A (en) * | 1985-03-21 | 1987-05-05 | Trerice Douglas N | Method and apparatus for reduction of fly ash carbon by microwave |
JPS61223424A (en) * | 1985-03-28 | 1986-10-04 | Ebara Corp | Incinerating disposal of waste including plastic |
FR2669553A1 (en) * | 1990-11-23 | 1992-05-29 | Fischer Ag Georg | PROCESS FOR SEPARATING BENTONITE PARTICLES AND CARBON CARRIERS FROM DUST OBTAINED BY MECHANICAL REGENERATION OF THE USE SAND. |
DE4118365A1 (en) * | 1991-06-05 | 1992-12-10 | Kuepper August Gmbh & Co Kg | Recycling of used foundry sand - by treating in a microwave furnace to volatilise, decompose or oxidise carbon@ or organic particles without effectively heating the sand |
WO1993013830A1 (en) * | 1992-01-10 | 1993-07-22 | Dupre Francoise | Process and plant for the treatment of industrial synthesized gypsum residues |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 011, no. 067 (M - 566) 28 February 1987 (1987-02-28) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003061873A1 (en) * | 2002-01-23 | 2003-07-31 | Pec Technologies Limited | A method of treating sand |
GB2399528A (en) * | 2002-01-23 | 2004-09-22 | Pec Technologies Ltd | A method of treating sand |
WO2016006010A1 (en) * | 2014-07-09 | 2016-01-14 | Area 45.55 S.R.L. | Method and plant for producing methane from materials containing organic carbon |
Also Published As
Publication number | Publication date |
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FR2736419B1 (en) | 1997-08-08 |
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Effective date: 20060331 |