EP0045766B1 - Dispositif de vidange pour une installation de pyrolyse des dechets - Google Patents

Dispositif de vidange pour une installation de pyrolyse des dechets Download PDF

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Publication number
EP0045766B1
EP0045766B1 EP19810900451 EP81900451A EP0045766B1 EP 0045766 B1 EP0045766 B1 EP 0045766B1 EP 19810900451 EP19810900451 EP 19810900451 EP 81900451 A EP81900451 A EP 81900451A EP 0045766 B1 EP0045766 B1 EP 0045766B1
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EP
European Patent Office
Prior art keywords
container
carbonization
discharging
discharging device
solid
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
Application number
EP19810900451
Other languages
German (de)
English (en)
Other versions
EP0045766A1 (fr
Inventor
Klaus Hillekamp
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.)
Deutsche Kommunal Anlagen Miete GmbH
Original Assignee
Deutsche Kommunal Anlagen Miete 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 Deutsche Kommunal Anlagen Miete GmbH filed Critical Deutsche Kommunal Anlagen Miete GmbH
Priority to AT81900451T priority Critical patent/ATE16288T1/de
Publication of EP0045766A1 publication Critical patent/EP0045766A1/fr
Application granted granted Critical
Publication of EP0045766B1 publication Critical patent/EP0045766B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B33/00—Discharging devices; Coke guides
    • C10B33/12—Discharge valves

Definitions

  • the invention relates to a discharge device for a waste pyrolysis plant for discharging the solid sulfuric substances in dry form, which is designed as a vertical container to which the welding substances are fed from above, which tapers conically, and has a blocking device which prevents the sulfuric substances from slipping through , and the sulfur column is used to seal the reactor against air.
  • Waste pyrolysis plants generally comprise a heatable furnace, for example a rotary tube furnace, to which the waste materials to be treated are added at one end and which are then decomposed into solid sulfur substances and into sulfur gas during their residence in the furnace.
  • the carbonization gas is used further while the treated solid carbonization materials are removed from the furnace via a discharge device, in which the discharge tube extends into a water bath which acts as a barrier through which the carbonization gases cannot escape.
  • this wet discharge has the disadvantage that the pyrolysis residues become wet when they pass through the water bath.
  • the water must then be removed again from the wet residues with considerable energy expenditure, for example evaporated.
  • the fine residue particles agglomerate in the water bath, for example carbon particles with ash particles. This may make it necessary to grind the residues, for example for screening after drying.
  • Discharge devices in which the solid residues of pyrolysis processes are discharged dry are already known from US-A-4 123 332 and US-A-1 978 139.
  • the discharge device of the device described in US-A-4123 332 for carbonizing a finely divided solid, carbonizable material consists of a discharge channel into which the solid residues fall.
  • a column forms which is used for gas sealing.
  • the removal is carried out by an inclined screw.
  • neither heating nor cooling is provided in the discharge device, so that there is a risk that the condensable hydrocarbons, which are particularly dangerous with regard to the preservation of the environment, get into the residue and are also discharged. This also applies to the discharge device described in US Pat. No.
  • the object of the invention was therefore to develop a discharge device for the discharge of welding substances from waste pyrolysis plants, in which the residues of the smoldering process occur in dry form, which allows a dry discharge of these residues, in which the gas tightness is achieved without the aid of a water bath and the discharge is carried out so that the residues are free of hydrocarbon condensates.
  • a discharge device for a waste pyrolysis plant for discharging the solid sulfurized substances in dry form which is designed as a vertical container to which the sulfurized substances are fed from above, which tapers conically. has a locking device that.
  • Prevents slippage of the carbonization material, and its carbonization column is used to seal the reactor against air access, which is characterized by a discharge pipe following the conical tapering of the container, which has a blocking device in the form of a rotatable screw or a plunger that prevents the solid carbonization material from slipping through, such a height of the container that the smoldering in it form a gas-tight layer, a device for maintaining a temperature of at least 250 ° C in the upper region of the sulfur column in a length over which practically no diffusion of the condensable components can occur, and a cooling device in the lower region of the sulfur column, which contains the blocking device.
  • the carbonized substances are discharged dry and free of hydrocarbon condensates and the gas tightness of the system is ensured even under negative pressure in the pyrolysis furnace.
  • the basic idea of the discharge device according to the invention is thus the gas seal over a carbonization column, combined with a “hot zone barrier”, ie. H. a heated upper part of the sulfur column to effectively prevent hydrocarbon condensation in the sulfur substances.
  • the cooling of the material to be discharged, which is dry and not wet, provided according to the invention reliably prevents the occurrence of explosions and fires.
  • the measures according to the invention prevent condensation and caking from occurring in the discharged solid sulfuric substances; a blockage of the discharge device 'and a load of the sulfurized materials with higher hydrocarbons, such as. B. tar and the like, therefore does not take place.
  • the solids outlet of the dust separator can also be connected to a discharge device according to the features of the present invention.
  • a plunger is used as the locking device, then this plunger is preferably arranged to be able to move back and forth in a tube running transversely to the container, the outlet end of which is arranged offset relative to the container. This prevents wires from becoming clogged, such as in a rotating locking device.
  • the temperature maintenance device is preferably a heater.
  • the device for maintaining the temperature can also be an insulation of the wall of the container.
  • a cooling device is provided in the lower region of the sulfur column, which contains the blocking device.
  • the solid smoldering materials can be cooled to an outlet temperature far below the gas condensation point and the self-ignition point, so that the solid smoldering materials cannot glow or burn when they come into contact with air and dust-containing discharge materials cannot explode.
  • the cooling device also has the advantage that the locking device is thermally little stressed.
  • a device can also be provided for inerting the space adjoining the locking device in order to prevent dust explosions.
  • the container is preferably designed as a tubular shaft. It can expand slightly downwards in the direction of the fall to avoid the occurrence of blockages.
  • the discharge device shown in Fig. 1 comprises a container 1, which is designed as a tubular shaft and consists of a circular cylindrical upper region 2, an adjoining frustoconical region 3 and a circular cylindrical lower region 4 adjoining the smaller opening thereof with a reduced diameter .
  • the tubular shaft is arranged vertically, and the inlet 5 above it is connected to the outlet of a rotary kiln 7 via a feed pipe 6.
  • the feed pipe 6 widens in the direction of flow in order to reduce the risk of clogging.
  • a rotatable worm 8 Arranged in the interior of the circular cylindrical lower region 4 is a rotatable worm 8 comprising a plurality of turns, the shaft 9 of which is guided at its upper end in an upper bearing 10 supported on the container and at its lower end in a lower bearing 11.
  • the lower bearing is held in a chute 12 which is connected to the outlet 13 of the tubular shaft. adjacent.
  • the upper bearing 10 can advantageously be omitted, since the screw can then avoid the transport of hard materials.
  • the circular cylindrical upper area 2 of the container is surrounded by a coil 14 which is connected with its inlet 15 and outlet 16 to a heating medium circuit (not shown). Hot gas can flow through the coil, for example.
  • the upper region 2 and the pipe coil 14 are also surrounded by a housing jacket 17 which, together with the wall of the container, leaves a space which is filled with an insulating agent 18.
  • the length of this heating and insulating area should be so large that the solid carbonized substances in the relevant area of the tubular shaft are kept at a temperature at which no condensation of components capable of condensation can yet occur. In most cases, a temperature of more than 250 ° C is required.
  • a cooling pipe coil 19 is attached, which is connected with its inlet 20 and outlet 21 to a coolant circuit, such as running water.
  • a coolant circuit such as running water.
  • a level meter 22 of a known type which is designed so that it only responds when the tubular shaft is filled with solid sulfuric materials up to the level of the level meter.
  • the frustoconical area 3, which forms the transition zone between the heated area and the cooled area, should of course be chosen so large that the cooled area does not affect the heated area.
  • the discharge device has the following mode of operation.
  • the solid carbonization materials flowing out of the rotary kiln 7 pass through the feed tube 6 into the tubular shaft 1 and fall at the beginning of the operation down to the screw 8, on which they remain, since the inclination of the screw is chosen so small that the carbonization materials are not can slide outwards on the screw blade.
  • the tubular shaft fills up until a certain fill level 23 is reached, at which the fill level meter 22 responds.
  • the motor 24 is switched on, which drives the worm 8, so that the carbonized material is conveyed out of the tubular shaft.
  • the solid smoldering substances emerging through the outlet 13 reach the chute 12 and are discharged from there to the outside, for example for further treatment for fuel production or activated carbon production and / or to the landfill.
  • the upper region of the tubular shaft is heated by the coil 4 to such a temperature, usually to at least 250 ° C., that condensable products cannot separate out, so that they do not get out with the solid sulfuric substances.
  • the solid carbonization materials are compressed due to the weight of the carbonization column above, so that the gas permeability is further reduced.
  • the conicity of the frustoconical region 3 must of course not be so great that it hinders the slipping through of the solid carbonization substances.
  • the fill level meter 22 switches off, so that the motor 24 driving the screw 8 is de-energized.
  • the container begins to fill up again to the fill level 23 at which the next emptying cycle is initiated.
  • the discharge device is gas-tight and that the gas-tightness is not released even if there is a negative pressure in the rotary kiln 7, since the weight of the sulfur column in the tubular shaft is able to a certain pressure -to withstand the difference between the outlet and the inlet.
  • FIG. 2 shows another embodiment of a discharge device, in which the container 31 comprises a double-walled upper area 32 which merges into a cylindrical discharge tube 33.
  • the outlet end 34 of the rotary tube of the rotary tube furnace protrudes tightly into the double-walled area 32.
  • a conveyor pipe 35 running transversely thereto, in which a screw conveyor 36 is rotatably mounted, which is coupled to a drive motor 37.
  • the discharge pipe 33 opens at one end region of the delivery pipe 35, while an outlet 38 is provided at the other end region of the same.
  • the double-walled upper region 32 of the container 31 is flowed through by hot gas, which can be removed at a suitable point in the pyrolysis plant (not shown), so that the container is heated in this region.
  • the lower region of the discharge pipe 33 and the delivery pipe 35 are surrounded by a cooling coil 39, which cools the solid carbonized substances to a temperature below the self-ignition temperature thereof.
  • a lower fill level sensor 40 and an upper fill level sensor 41 are arranged in the upper region of the discharge pipe 33. These are designed in such a way that they respond when the solid smoldering materials reach a level sensor.
  • the fill level sensors are connected to a control circuit (not shown) for the drive motor 37, which is designed such that the upper fill level sensor 41, when it is covered by carbon dioxide, switches the drive motor on, while the lower fill level sensor 40 then switches off the drive motor 37, when it is no longer covered by smoldering substances.
  • the mode of operation of the discharge device according to FIG. 2 is similar to that of the discharge device according to FIG. 1, so that a further description is unnecessary.
  • the length of the carbonization column must of course be chosen so large that the solid carbonization materials are not lifted and loosened by the greater pressure acting on the underside of the container in order to ensure gas-tightness. This is certainly achieved if the weight of the sulfur column in the container per Unit area is greater than the pressure difference between the bottom and the top of the Schwelstoffkla.
  • the residue can, for example, be discharged hot into a collecting vessel, into which water is injected in such an amount that the discharged substances remain dry, but are cooled.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

Le dispositif de vidange pour une installation de pyrolyse pour le traite un conteneur (1) dispose verticalement dans lequel la matiere carbonisee est amenee dans sa partie superieure; ce conteneur presente, dans sa partie inferieure, un mecanisme de blocage (8) empechant le glissement de la matiere carbonisee; la hauteur du conteneur est telle que la matiere carbonisee s'y trouvant forme une couche hermetique. Un dispositif permet de maintenir la temperature a une valeur egale ou superieure a 250 C a la partie superieure de la colonne de matiere carbonisee sur une longueur telle qu'au-dessus de celle-ci aucune diffusion de composants susceptibles de condensation n'a lieu. Un tel dispositif de vidange n'utilise pas l'eau comme couche hermetique, il est egalement hermetique aussi bien pour les pressions ayant lieu dans l'installation de pyrolyse que la depression ayant lieu dans le four.

Claims (9)

1. Dispositif d'évacuation pour une installation de pyrolyse de déchets destinée à évacuer les substances à lente distillation en forme sèche, ce dispositif d'évacuation étant développé comme un récipient placé à la verticale dans lequel les substances à lente distillation sont chargées par le haut, qui est effilé coniquement, qui représente un appareil d'arrêt évitant que les substances à lente distillation passent à travers, et dont la colonne de substances à lente distillation sert à étanchéifier le réacteur contre l'arrivée d'air, caractérisé en un tuyau d'évacuation (4) joint à l'effilement conique (3) du récipient (1) représentant un appareil d'arrêt (8 ; 36) en forme d'une vis sans fin mobile sur un axe ou d'un coulisseau empêchant que les substances solides à lente distillation passent à travers, une hauteur du récipient telle que les substances à lente distillation qui se trouvent là-dedans forment une couche étanche au gaz, un système (14 à 16, 18) destiné à maintenir une température d'au moins 250 °C dans le secteur supérieur de la colonne de substances à lente distillation qui a une longueur au-dessus de laquelle pratiquement aucune diffusion des éléments condensables ne pourra plus se produire, et un système de refroidissement (19 à 21 ; 39) dans le secteur inférieur de la colonne de substances à lente distillation lequel comprend l'appareil d'arrêt (8 ; 36).
2. Dispositif d'évacuation selon revendication 1 caractérisé en un séparateur de poussières, pour la poussière contenue dans le gaz à distillation lente, et dont la sortie de substances solides est amenée également à un récipient auquel la poussière séparée est conduit sur la face supérieure et qui représente un appareil d'arrêt sur sa face inférieure.
3. Dispositif d'évacuation selon revendication 1 ou 2 caractérisé en ce que le coulisseau (36) est placé dans un tuyau (35) allant à la verticale du récipient (1) et mobile de long en large, sa sortie (38) étant placée en déport par rapport au récipient (1).
4. Dispositif d'évacuation selon revendication 1 à 3 caractérisé en ce que l'appareil d'arrêt est commandé ou réglé par la hauteur de remplissage des substances à lente distillation contenues dans le récipient.
- -5. Dispositif d'évacuation selon revendication 1 à 4 caractérisé en ce que le système destiné à maintenir la température est un système de chauffage (14 à 16).
6. Dispositif d'évacuation selon revendication 5 caractérisé en ce que le système destiné à maintenir la température est une isolation (18) de la paroi du récipient (1).
7. Dispositif d'évacuation selon revendication 1 à 6 caractérisé en ce qu'il représente un dispositif pour rendre inerte l'espace contigu" à l'appareil d'arrêt.
8. Dispositif d'évacuation selon revendication 1 à 7 caractérisé en ce que le récipient (1) forme un puits tubulaire.
9. Dispositif d'évacuation selon revendication 8 caractérisé en ce que le puits tubulaire s'élargit légèrement de manière conique en direction de la chute.
EP19810900451 1980-02-12 1981-02-06 Dispositif de vidange pour une installation de pyrolyse des dechets Expired EP0045766B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81900451T ATE16288T1 (de) 1980-02-12 1981-02-06 Austragvorrichtung fuer eine abfallpyrolyseanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803005205 DE3005205C2 (de) 1980-02-12 1980-02-12 Austragsvorrichtung für eine Abfall-Pyrolyseanlage
DE3005205 1980-02-12

Publications (2)

Publication Number Publication Date
EP0045766A1 EP0045766A1 (fr) 1982-02-17
EP0045766B1 true EP0045766B1 (fr) 1985-10-30

Family

ID=6094411

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19810900451 Expired EP0045766B1 (fr) 1980-02-12 1981-02-06 Dispositif de vidange pour une installation de pyrolyse des dechets
EP19810100904 Expired EP0033971B1 (fr) 1980-02-12 1981-02-09 Dispositif de déchargement pour installation de pyrolyse des déchets

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19810100904 Expired EP0033971B1 (fr) 1980-02-12 1981-02-09 Dispositif de déchargement pour installation de pyrolyse des déchets

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EP (2) EP0045766B1 (fr)
CA (1) CA1184530A (fr)
DE (1) DE3005205C2 (fr)
WO (1) WO1981002302A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4503783A (en) * 1983-07-11 1985-03-12 General Kinematics Corporation Furnace ash air seal
SE516080C2 (sv) * 1992-10-28 2001-11-12 Alf Johansson Förfarande och anordning för återvinning av sådana beståndsdelar som gas, olja och fasta ämnen från exempelvis gummi
US5915308A (en) * 1996-01-18 1999-06-29 Siemens Aktiengesellschaft Discharge apparatus
CA2243480A1 (fr) * 1996-01-18 1997-07-24 Siemens Aktiengesellschaft Dispositif de dechargement
DE102011014349A1 (de) * 2011-03-18 2012-09-20 Ecoloop Gmbh Wanderbettreaktor
DE102012111050A1 (de) 2012-11-16 2014-05-22 Thyssenkrupp Resource Technologies Gmbh Mehretagenofen und Verfahren zur thermischen Behandlung eines Stoffstroms
US10323109B2 (en) 2017-11-17 2019-06-18 Chevron Phillips Chemical Company Lp Methods of preparing a catalyst utilizing hydrated reagents

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US1798500A (en) * 1919-02-01 1931-03-31 C H Ellsworth Rotary kiln
DE436919C (de) * 1923-11-25 1926-11-11 Kohlenscheidungs Ges M B H Verschwelung bitumenhaltiger Stoffe
US1995873A (en) * 1928-02-10 1935-03-26 Internat Bitumenoil Corp Retort
GB323523A (en) * 1928-07-30 1929-12-30 Internat Bitumenoil Corp Improved method of and apparatus for low temperature distillation
US1916900A (en) * 1928-08-16 1933-07-04 Internat Bitumenoil Corp Method of low temperature distillation
US1978139A (en) * 1930-04-04 1934-10-23 Bank Continental Illi National Apparatus for carbonizing bituminous materials
US2056746A (en) * 1931-12-19 1936-10-06 Strupp Ernst Method for carbonization of all kinds of pulp waste lyes
US1980828A (en) * 1932-01-15 1934-11-13 Harry S Reed Apparatus and process for distilling and treating coal and other carbonaceous materials
DE827796C (de) * 1950-09-10 1952-01-14 Steine Und Erden G M B H Der R Vorrichtung zur Nassentstaubung von Gasen und Daempfen, insbesondere Kalkloeschbrueden
US3098458A (en) * 1961-11-01 1963-07-23 Pan American Resources Inc Rotary refuse converter
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DE2244753B1 (de) * 1972-09-08 1973-10-18 Mannesmann Ag, 4000 Duesseldorf Verfahren und Vorrichtung zur Ver mchtung von Mull
GB1460931A (en) * 1973-12-24 1977-01-06 Fuji Kasui Eng Co Ltd Method for disposal of rubber waste
FI753581A (fr) * 1975-02-10 1976-08-11 Deco Ind
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US4123332A (en) * 1977-09-06 1978-10-31 Energy Recovery Research Group, Inc. Process and apparatus for carbonizing a comminuted solid carbonizable material

Also Published As

Publication number Publication date
DE3005205C2 (de) 1983-11-24
WO1981002302A1 (fr) 1981-08-20
EP0033971B1 (fr) 1985-10-23
EP0033971A3 (en) 1981-08-26
DE3005205A1 (de) 1981-08-13
EP0033971A2 (fr) 1981-08-19
EP0045766A1 (fr) 1982-02-17
CA1184530A (fr) 1985-03-26

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