EP0179195B1 - Beschickungssystem eines Ofens, das die Filtration der Gaspartikel, die Kondensation der volatilen Produkte und ihre Rückführung zum Ofen erlaubt - Google Patents

Beschickungssystem eines Ofens, das die Filtration der Gaspartikel, die Kondensation der volatilen Produkte und ihre Rückführung zum Ofen erlaubt Download PDF

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Publication number
EP0179195B1
EP0179195B1 EP85107149A EP85107149A EP0179195B1 EP 0179195 B1 EP0179195 B1 EP 0179195B1 EP 85107149 A EP85107149 A EP 85107149A EP 85107149 A EP85107149 A EP 85107149A EP 0179195 B1 EP0179195 B1 EP 0179195B1
Authority
EP
European Patent Office
Prior art keywords
reactor
gaseous effluents
granular form
pipe
conveyor
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.)
Expired - Lifetime
Application number
EP85107149A
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English (en)
French (fr)
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EP0179195A1 (de
Inventor
Michel G. Drouet
Richard J. Munz
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.)
Hydro Quebec
Original Assignee
Hydro Quebec
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Filing date
Publication date
Application filed by Hydro Quebec filed Critical Hydro Quebec
Publication of EP0179195A1 publication Critical patent/EP0179195A1/de
Application granted granted Critical
Publication of EP0179195B1 publication Critical patent/EP0179195B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/28—Treating solids
    • G21F9/30—Processing
    • G21F9/32—Processing by incineration

Definitions

  • the present invention relates to the purification of gaseous effluents. More specifically, the invention relates to the treatment of gaseous effluents produced or leaving a reactor operating at high temperature, in order to remove the impurities. Even more precisely, it can be said that the invention relates to a process and to an installation for feeding a reactor making it possible to separate the particles from the gases, to condense the volatile products and to return the latter to the reactor.
  • An object of the present invention lies in the condensation of volatile materials and the stopping of the dust which results from the treatment of nuclear waste.
  • a method is provided which makes it possible to stop dust, droplets, dangerous products, and any undesirable material which can escape into the atmosphere.
  • the feed rate of the material in granular form is controlled so that the material in granular form is introduced in an amount sufficient to meet the standards of the reactor.
  • the speed of the gaseous effluents is adjusted so as to ensure maximum filtration efficiency when the gaseous effluents move against the current through the material in granular form.
  • a propeller conveyor or any other solid conveyor is provided in the pipe, and the speed of the propeller conveyor is adjusted so as to supply the reactor with a quantity of material in granular form sufficient to meet the demand of the reactor.
  • the speed of the gaseous effluents through the particles in the pipe is preferably adjusted to the pitch and to the diameter of the propeller conveyor so that the material in granular form stops practically all the impurities present in the gaseous effluents, whereas the latter move in the pipe.
  • the installation according to the invention for the treatment of gaseous effluents in order to remove the impurities comprises a high temperature reactor (1), where said gaseous effluents are produced, first means (5) for feeding a material to treating in the reactor, means for heating the contents of the reactor and means (29) for allowing the gaseous effluents to leave the atmosphere.
  • the installation is characterized by the fact that it comprises second means (13, 15), distinct from the first means, for supplying a material in granular form to the reactor, said second means comprising a pipe (13) inclined downwards connected to said reactor, a conveyor (17) arranged in said pipe for feeding the material in granular form into the reactor and control means for adjusting the speed of said conveyor so as to introduce into the reactor a quantity of material in granular form sufficient to satisfy the requirements of the reactor, said pipe comprising means allowing the gaseous effluents to escape upward against the current by the pipe inclined through said material in granular form, and means for independently controlling the feed rate of the material in granular form and the speed of the gaseous effluents.
  • the system which is illustrated in the drawing comprises a reactor 1 which can be used, for example, to form a product of fusion between nuclear waste and sand.
  • the reactor can be heated everywhere means known to those skilled in the art, in particular by using electrodes (not shown). These means have been illustrated schematically by the arrow 3.
  • the material which is intended to be treated in the reactor 1, in particular a mud, a chlorinated polymer, a radioactive material, etc., is introduced into the reactor by the inlet 5.
  • the material is introduced into reactor 1 in the direction of arrow 7.
  • a pipe 13 is disposed in the closure 11, and as can be seen in the drawing, this pipe 13 enters into communication with a chamber 15 as will be seen in more detail below.
  • the material to be treated is was introduced into the reactor via inlet 5.
  • radioactive material it is desired to form a glassy mass of the radioactive material so as to prevent it from being leached.
  • sand is introduced through the inlet 25 and the latter is allowed to descend into the pipe 13 in a controlled downward movement resulting from the rotation of the propeller conveyor 17.
  • the speed of the conveyor is adjusted so that the feed rate of the material in granular form into the reactor is adapted to the need of the latter.
  • Any reactive product, any substance that can be condensed, granular material, or dust can be stopped by the descending sand and then returned to the bath 33.
  • the gases which escape from the chamber 15 can exit into the atmosphere at relatively pure state.
  • This system offers possibilities of obvious application in the solidification of nuclear waste. It can also be used in metallurgical furnaces, and in heating appliances used to recover special alloys, to incinerate hazardous waste, and in furnaces for the production of glass and ceramics. Obviously, we can also consider other uses of this system.
  • the system can be used with sand to condense volatile materials and stop dust.
  • sand and coke can be used to stop dust and droplets.
  • Sand and a reactive product can be used to stop dangerous products.
  • the dust produced in metallurgical furnaces can be prevented from escaping into the atmosphere by using the system according to the invention.
  • the losses of volatile materials are controlled by the rate of evaporation from the surface of the liquid bath and the rate of dissolution in the bath. Returning the waste that has been volatilized or entrained by the gases to the bath considerably reduces losses because only a small fraction of the material returned to the bath will be volatilized again or entrained by the gases.
  • the products to be treated can be supplied in the form of liquid, solid or mud via the inputs 5 or 31.
  • the main application in metallurgy is to prevent most of the dust from reaching the atmosphere.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Mechanical Engineering (AREA)
  • Treating Waste Gases (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Claims (9)

1. Verfahren zur Behandlung von Abgasen, um die Verunreinigungen daraus zu entfernen, wobei die Abgase aus einem Hochtemperatur-Reaktor (1) austreten und ein Material in Form eines Granulates (23) dem Reaktor zugeführt wird, welches Verfahren dadurch gekennzeichnet ist, daß:
-das Material in Form eines Granulates durch eine nach abwärts geneigte Leitung (13) zugeführt wird, die mit einem Förderer (17) versehen ist, dessen Geschwindigkeit so gesteuert wird, daß der Reaktor auf solche Weise gespeist wird, daß seinen Anforderungen entsprochen wird;
-ein Strom von Abgasen im Gegenstrom in der genannten Leitung (13) durch das Material in Form eines Granulates (23) hochsteigen gelassen wird und unabhängig die Zufuhrmenge bzw. -rate an Material in Form eines Granulates und die Geschwindigkeit der Abgase so gesteuert wird, daß die in den Abgasen enthaltenen Teichen im wesentlichen alle vom Material in Form eines Granulates festgehalten und zum Hochtemperatur-Reaktor rückgeführt und die gereinigten Abgase aus dem Reaktor austreten gelassen werden.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Zufuhrmenge bzw. -rate an Material in Form eines Granulates so gesteuert wird, daß sie den Anforderungen des Reaktors entspricht.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Geschwindigkeit der Abgase so eingestellt wird, daß ein Maximum an Filterleistung erzielt wird, wenn sich die Abgase im Gegenstrom im Material in Form eines Granulates fortbewegen.
4. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Förderer ein Schneckenförderer ist.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Geschwindigkeit der Abgase im Material in Form eines Granulates mittels der Ganghöhe und dem Durchmesser des Schnekkenförderers so eingestellt wird, daß das Material in Form eines Granulates praktisch alle Verunreinigungen festhält, die in den Abgasen vorhanden sind, wenn die genannten Abgase die genannte Leitung durchströmen.
6. Vorrichtung zur Behandlung von Abgasen, um die Verunreinigungen daraus zu entfernen, umfassend einen Hochtemperatur-Reaktor (1), in dem die genannten Abgase erzeugt werden, erste Einrichtungen (5), um ein im Reaktor zu behandelndes Material zuzuführen, Einrichtungen zum Erwärmen des Inhalts des Reaktors und Einrichtungen (29), um das Austreten der Abgase in die Atmosphäre zu ermöglichen, dadurch gekennzeichnet, daß die Vorrichtung zweite Einrichtungen (13, 15) aufweist, die von den ersten Einrichtungen verschieden sind, um den Reaktor mit einem Material in Form eines Granulates zu beschicken, welche zweiten Einrichtungen eine mit dem genannten Reaktor verbundene, nach abwärts geneigte Leitung (13), einen Förderer (17), der in der genannten Leitung angeordnet ist, um den Reaktor mit dem Material in Form eines Granulates zu beschicken und eine Steuerungseinrichtung aufweist, um die Geschwindigkeit des genannten Förderers so einzustellen, daß der Reaktor mit einer Menge an Material in Form eines Granulates beschickt wird, die seinen Anforderungen entspricht, welche Leitung Einrichtungen aufweist, die ermöglichen, daß die Abgase im Gegenstrom durch die geneigte Leitung durch das Material in Form eines Granulates nach oben austreten können und Einrichtungen vorgesehen sind, um unabhängig die Zufuhrmenge bzw. -rate an Material in Form eines Granulates und die Geschwindigkeit der Abgase zu steuern.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der Förderer ein Schneckenförderer ist.
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Ganghöhe und der Durchmesser des Schneckenförderers (17) so gewählt sind, daß praktisch alle in den Abgasen vorhandenen Verunreinigungen vom Material in Form eines Granulates festgehalten werden, wenn die Abgase die genannte Leitung (13) durchströmen.
9. Vorrichtung nach einem oder mehreren der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß sie eine sekundäre Einlaßleitung (31) aufweist, die entlang der genannten Leitung (13) angeordnet ist und die Beschickung des Reaktors (1) mit zusätzlichem Material in Form eines Granulates und/oder gefährlichem Material zuläßt.
EP85107149A 1984-10-22 1985-06-11 Beschickungssystem eines Ofens, das die Filtration der Gaspartikel, die Kondensation der volatilen Produkte und ihre Rückführung zum Ofen erlaubt Expired - Lifetime EP0179195B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA466016 1984-10-22
CA000466016A CA1246323A (fr) 1984-10-22 1984-10-22 Methode et systeme de purification d'effluents gazeux

Publications (2)

Publication Number Publication Date
EP0179195A1 EP0179195A1 (de) 1986-04-30
EP0179195B1 true EP0179195B1 (de) 1990-09-26

Family

ID=4128966

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107149A Expired - Lifetime EP0179195B1 (de) 1984-10-22 1985-06-11 Beschickungssystem eines Ofens, das die Filtration der Gaspartikel, die Kondensation der volatilen Produkte und ihre Rückführung zum Ofen erlaubt

Country Status (13)

Country Link
EP (1) EP0179195B1 (de)
JP (1) JPS61101220A (de)
KR (1) KR910004787B1 (de)
AT (1) ATE57041T1 (de)
AU (1) AU584892B2 (de)
BR (1) BR8502776A (de)
CA (1) CA1246323A (de)
DE (1) DE3579885D1 (de)
ES (2) ES8706468A1 (de)
GR (1) GR851080B (de)
IN (1) IN163444B (de)
MX (1) MX171201B (de)
ZA (1) ZA852823B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3833661A1 (de) * 1988-10-04 1990-04-05 Uhde Gmbh Vorrichtung mit schuettschichtfiltern zur reinigung von rohgas
DE102017122970B4 (de) 2017-10-04 2021-10-21 FischerteC GmbH Verbrennungsofen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1194873A (fr) * 1960-12-22 1959-11-13 Soc Produits Azotes Sa Procédé et installations pour le dépoussiérage des fumées émises par les foursd'électrométallurgie
FR1445500A (fr) * 1965-03-12 1966-07-15 Commissariat Energie Atomique Procédé de destruction de liquides contaminés
BE788481A (fr) * 1972-09-06 1973-01-02 Belgonucleaire Sa Perfectionnements au traitement des residus combustibles
AU539929B2 (en) * 1980-10-29 1984-10-25 Exxon Research And Engineering Company Fluid-solid contacting using fluidised bed of magnetic particles
US4391205A (en) * 1981-02-06 1983-07-05 Morey Norval K Method and apparatus for burning green wood chips

Also Published As

Publication number Publication date
ATE57041T1 (de) 1990-10-15
EP0179195A1 (de) 1986-04-30
IN163444B (de) 1988-09-24
KR860003623A (ko) 1986-05-28
CA1246323A (fr) 1988-12-13
DE3579885D1 (de) 1990-10-31
JPH0413004B2 (de) 1992-03-06
ES551208A0 (es) 1988-06-16
AU4144485A (en) 1986-05-01
JPS61101220A (ja) 1986-05-20
MX171201B (es) 1993-10-06
ES542717A0 (es) 1987-07-16
BR8502776A (pt) 1986-05-27
AU584892B2 (en) 1989-06-08
KR910004787B1 (ko) 1991-07-13
ZA852823B (en) 1985-12-24
ES8706468A1 (es) 1987-07-16
ES8802414A1 (es) 1988-06-16
GR851080B (de) 1985-11-25

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