EP0179195A1 - 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
EP0179195A1
EP0179195A1 EP85107149A EP85107149A EP0179195A1 EP 0179195 A1 EP0179195 A1 EP 0179195A1 EP 85107149 A EP85107149 A EP 85107149A EP 85107149 A EP85107149 A EP 85107149A EP 0179195 A1 EP0179195 A1 EP 0179195A1
Authority
EP
European Patent Office
Prior art keywords
reactor
granular form
gaseous effluents
conveyor
pipe
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
Application number
EP85107149A
Other languages
English (en)
French (fr)
Other versions
EP0179195B1 (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
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 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 system and to a method of supplying 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 resides in the condensation of volatile materials and stopping of dust resulting from the processing 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 invention relates to a method for treating gaseous effluents in order to remove the impurities, these gaseous effluents escaping from a reactor at high temperature and a material in granular form being introduced into the reactor.
  • the gaseous effluents are introduced against the current through a portion of the materials in granular form which are fed to the reactor, and separately, the rate of introduction of materials in granular form and the speed of the gaseous effluents are controlled. so that the particles present in the gases are almost all stopped by the granular materials fed to the reactor and are returned to the reactor at high temperature, which allows the exit of purified gaseous effluents,
  • the material in granular form is introduced into the reactor through a downwardly inclined pipe, and the gaseous effluents are made to rise against the current with respect to the material in the form granular, in the downward inclined pipe.
  • 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 gaseous effluent treatment system comprises a high temperature reactor in which gaseous effluents are produced, first means for feeding the material to be treated into the reactor, means for heating the contents of the reactor, second different means first means for introducing a material in granular form into the reactor, the material in granular form acting on the material to be treated, means for directing a stream of gaseous effluents produced in the reactor against the current with respect to the material in form granular, means for independently controlling the rate of supply of the material in granular form and the speed of the gaseous effluents so that the particles in the gas flow are substantially all stopped by the supply of material in granular form and that they are returned to the reactor, and means to allow the purified gaseous effluents to go out into the atmosphere.
  • the system which is illustrated in the drawing comprises a reactor 1 which can be used, for example, to form a fusion product between nuclear waste and sand.
  • the reactor can be heated by any means known to those skilled in the art, in particular using electrodes (not shown). These means have been illustrated schematically by 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 inlet S.
  • 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 has was introduced into the reactor through inlet 5.
  • material radioactive it is desired to form a vitreous 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 latter's need.
  • 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 heaters 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 returned to the bath can be fed in the form of liquid, solid or mud through 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)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
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 true EP0179195A1 (de) 1986-04-30
EP0179195B1 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

Citations (4)

* 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
GB1416053A (en) * 1972-09-06 1975-12-03 Belgonucleaire Sa Purification of combustion gases of an incinerator furnace
US4391205A (en) * 1981-02-06 1983-07-05 Morey Norval K Method and apparatus for burning green wood chips

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU539929B2 (en) * 1980-10-29 1984-10-25 Exxon Research And Engineering Company Fluid-solid contacting using fluidised bed of magnetic particles

Patent Citations (4)

* 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
GB1416053A (en) * 1972-09-06 1975-12-03 Belgonucleaire Sa Purification of combustion gases of an incinerator furnace
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
ES551208A0 (es) 1988-06-16
JPS61101220A (ja) 1986-05-20
KR860003623A (ko) 1986-05-28
IN163444B (de) 1988-09-24
EP0179195B1 (de) 1990-09-26
ATE57041T1 (de) 1990-10-15
AU584892B2 (en) 1989-06-08
ES8706468A1 (es) 1987-07-16
CA1246323A (fr) 1988-12-13
JPH0413004B2 (de) 1992-03-06
GR851080B (de) 1985-11-25
AU4144485A (en) 1986-05-01
DE3579885D1 (de) 1990-10-31
MX171201B (es) 1993-10-06
ES542717A0 (es) 1987-07-16
ZA852823B (en) 1985-12-24
KR910004787B1 (ko) 1991-07-13
BR8502776A (pt) 1986-05-27
ES8802414A1 (es) 1988-06-16

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