[go: up one dir, main page]

WO1999024773A1 - Dispositif destine a l'echange de chaleur entre un fluide porteur de chaleur et une matiere solide - Google Patents

Dispositif destine a l'echange de chaleur entre un fluide porteur de chaleur et une matiere solide Download PDF

Info

Publication number
WO1999024773A1
WO1999024773A1 PCT/EP1998/007236 EP9807236W WO9924773A1 WO 1999024773 A1 WO1999024773 A1 WO 1999024773A1 EP 9807236 W EP9807236 W EP 9807236W WO 9924773 A1 WO9924773 A1 WO 9924773A1
Authority
WO
WIPO (PCT)
Prior art keywords
loosening
solid
heat exchanger
vessel
heat
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.)
Ceased
Application number
PCT/EP1998/007236
Other languages
German (de)
English (en)
Inventor
Romain Frieden
Louis Schmit
Romain Neissen
Thomas Hansmann
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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
Priority claimed from LU90165A external-priority patent/LU90165B1/xx
Priority claimed from LU90220A external-priority patent/LU90220B1/de
Application filed by Paul Wurth SA filed Critical Paul Wurth SA
Priority to AU18722/99A priority Critical patent/AU1872299A/en
Publication of WO1999024773A1 publication Critical patent/WO1999024773A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D13/00—Heat-exchange apparatus using a fluidised bed

Definitions

  • the present invention relates to a device for heat exchange between a heat transfer fluid and a solid.
  • a device for heat exchange between a heat transfer fluid and a solid is used, for example, to heat coal dust before blowing it into a shaft furnace or before charging it into a rotary hearth furnace for producing sponge iron.
  • the heat transport in the solid is limited by its low thermal conductivity.
  • the heat transport, in the solid it is therefore generally processed into a fine-grained, flowable and loosenable bulk material and introduced into a loosening vessel.
  • a loosening fluid is introduced into the bulk material from below via an inflow base, flows through the bulk material and loosens it.
  • the loosened bulk material layer and the flowing loosening fluid form a fluidized bed, which as a whole has fluid-like properties.
  • the fluid flow and the movement of solids in the fluidized bed allow high heat and mass transfer through convection.
  • a heat transfer medium is then passed through the fluidized bed, which introduces heat into the fluidized bed or removes it from the latter.
  • heat exchanger tubes are arranged above the inflow base, which extend essentially parallel to it through the fluidized bed and to which a suitable heat transfer medium is applied.
  • the heat exchanger tubes form heating or cooling surfaces on which heat transfer takes place between the loosened solid and the heat transfer medium. In this way, the solid can be brought quickly to the desired temperature.
  • the Heating or cooling of the solid are carried out continuously, the loosened bulk material flowing slowly due to its fluid-like properties from the entry side through the loosening vessel to the discharge side.
  • the loosening fluid flowing vertically upward flows around the heat exchanger tubes, which extend essentially in the horizontal direction.
  • the formation of the fluidized bed is disrupted by the heat exchanger tubes. If heat is added to the solid, local overheating of the solid can occur at a correspondingly high temperature of the heat transfer medium.
  • the object of the present invention is therefore to propose a device for heat exchange between a heat transfer fluid and a solid, in which the formation of a fluidized bed can take place as undisturbed as possible.
  • a device for heat exchange between a heat transfer medium and a solid in which a loosening fluid can be introduced into the solid such that it forms a fluidized bed with the loosening fluid, and the loosened solid and the heat transfer medium pass each other are guided, the solid and the heat carrier being guided essentially in the vertical direction.
  • the heat carrier is consequently guided in the flow direction of the loosening fluid, so that the formation of the fluidized bed can take place undisturbed.
  • the device comprises at least one loosening vessel into which the solid can be introduced and in which the loosening fluid can be introduced into the solid in such a way that it forms a fluidized bed with the loosening fluid, and a heat exchanger which can be acted upon by the heat transfer medium .
  • the heat exchanger extends essentially perpendicularly through the at least one loosening vessel.
  • the heat exchanger accordingly extends in the fluidized bed in flow direction of the loosening fluid.
  • the movement of the loosening fluid thus takes place primarily parallel to the heat exchanger, so that the formation of the fluidized bed is not significantly disturbed by the heat exchanger tubes. Local deposits of the solid and their adverse effects on the heat exchange between the solid and the heat transfer medium are avoided.
  • the parallel flow also minimizes wear on the heat exchanger.
  • the heat exchanger preferably comprises a plurality of heat exchanger tubes which extend essentially parallel to one another at a certain distance.
  • the heat exchanger tubes run essentially vertically through the fluidized bed and advantageously emerge from it in the vertical direction. So that this is the case regardless of the layer thickness of the fluidized bed, the heat exchanger tubes are preferably guided through the entire loosening vessel, whereby they are carried out in a vertical direction through the bottom and the top of the loosening vessel.
  • the at least one loosening vessel extends essentially perpendicularly through the heat exchanger.
  • the fluidized bed is accordingly formed in a loosening vessel which is arranged in the interior of a heat exchanger tube of the heat exchanger. There are no heat exchanger tubes arranged inside the loosening vessel, the loosening gas can consequently flow through the solid bed undisturbed and the formation of the fluidized bed takes place undisturbed.
  • the loosening vessel is preferably tubular and opens at its upper end into a discharge device for discharging the solid matter from the loosening vessel.
  • the entry of the solid in the loosening vessel is then preferably carried out at the lower end of the loosening vessel.
  • the device comprises several
  • Loosening vessels which extend at a certain distance substantially parallel to each other.
  • the solid is in this device several loosening vessels divided, so that there is a very large heat exchange area.
  • the heat exchanger comprises a plurality of heat exchanger tubes which can be acted upon by the heat transfer medium, and in that each loosening vessel extends essentially perpendicularly through one of the heat exchanger tubes.
  • the use of a heat exchanger which is acted upon by the heat transfer medium advantageously minimizes the effort involved in cleaning the heat transfer fluid.
  • a large flow of heat-emitting (or heat-absorbing) heat transfer medium is required to achieve a strong temperature change in the solid. If the heat transfer medium is passed directly through the solid, a great deal of effort is required to clean the heat transfer medium from the solid which has been taken up, in particular if the heat transfer medium which is loaded with solids has a high temperature.
  • the heat transfer medium is therefore advantageously separated from the solid material.
  • the heat transfer medium in the heat exchanger and the solid in the respective loosening vessel are guided in countercurrent to one another in both variants. This maximizes the average temperature gradient between the solid and the loosening fluid and increases the thermal efficiency of the device.
  • the effectiveness of the heat exchange is consequently significantly increased. Since the heat transfer medium is passed vertically through the heat exchanger, the solid has to reach a counterflow in the vertical direction be guided through the respective loosening vessel.
  • the device therefore has an entry device for entering the solid into the respective loosening vessel and a discharge device for discharging the solid from the loosening vessel, the entry device and the discharge device being arranged in planes which are perpendicular to one another are trained.
  • the solid that flows in the fluidized bed from the insertion device to the discharge device moves macroscopically accordingly in the vertical direction, the fluidized bed preferably being traversed from bottom to top.
  • the entry of the solid is accordingly preferably carried out at the lower end of the loosening vessel, the discharge in a plane which is perpendicular above it.
  • the heat transfer medium is then passed through the heat exchanger tubes in the opposite direction, ie from top to bottom.
  • the heat exchange surface required for the desired temperature change can be formed into the vertical by a correspondingly large, vertical fluidized bed thickness.
  • the base area of the loosening vessel is reduced with an increased inlet pressure of the loosening fluid.
  • the mass flow of the loosening fluid becomes smaller and its possibly unfavorable influence on the heat balance (e.g. due to the cooling effect in a solid to be heated) is reduced.
  • the small amount of loosening fluid reduces the effort for separating loosening fluid and entrained solid.
  • the feed device is preferably designed in such a way that the solid is fed into the respective loosening vessel directly above an inflow floor through which the loosening fluid can be introduced into the loosening vessel.
  • the insertion device can extend, for example, through the inflow floor.
  • the entry should be distributed as evenly as possible over the floor cross-sectional area.
  • the entry device can have a plurality of entry openings which are distributed over the surfaces of the respective inflow floors.
  • the solid can be introduced, for example, by flow promotion.
  • the flow rate can be be appropriately divided over a larger number of lines. If compressed gas is used as the conveying medium, gas consumption, the impact on the heat balance and wear can be minimized when using dense phase conveying, and the distribution of the conveying flow can be precisely adjusted, for example, by two-substance nozzles with critical expansion.
  • the loosening vessel or the loosening vessels is / are advantageously designed as a pressure vessel and can be subjected to an overpressure. This can be achieved with little effort by the formation of the fluidized bed in the vertical and the associated reduction in the base area of the loosening vessel. In the loosening gas flowing under increased overpressure, the convection improves and the heat exchange is optimized.
  • the discharge device preferably comprises a device for separating solid matter from the loosening fluid.
  • This can e.g. be a cyclone, which uses the excess pressure still available at the outlet of the fluidized bed for the effective cleaning of the loosening fluid.
  • FIG. 1 schematically shows a section through a first embodiment of a device according to the invention for heat exchange between a heat transfer medium and a solid;
  • Fig. 2. a section through a second embodiment of a device according to the invention.
  • FigJ shows schematically a section through a first embodiment of a device according to the invention, e.g. a plant for heating coal dust.
  • the system comprises a loosening vessel 10 in which the solid is brought into a loosened state in order to improve the heat transfer.
  • the bottom of the loosening vessel 10 is designed as an inflow bottom 12, through which a flocculation gas is introduced into the loosening vessel 10 from below.
  • the inflow floor comprises, for example, a mer 14, the upper wall of which has a large number of pores. If the loosening gas is applied to the chamber 14 via a supply connection 16 and pressurized, the loosening gas can escape through the pores and flow into the loosening vessel 10.
  • the solid which has been processed to form a fine-grained, flowable and loosening bulk material, is introduced into the loosening vessel 10 from one or more conveying vessels 18 and flowed through and loosened by the loosening gas.
  • the loosened solid layer and the flowing loosening gas form a fluidized bed 20, which as a whole has fluid-like properties.
  • the gas flow and the movement of solids allow a high heat exchange performance by convection.
  • the solid is introduced into the loosening vessel 10 preferably directly above the inflow floor 12 and distributed as evenly as possible over its surface.
  • a plurality of inlet nozzles 22 are arranged distributed in the inflow floor 12, each of which form an inlet opening in the upper porous wall of the inflow floor 12.
  • the transport of the solid matter from the conveying vessels 18 to the individual feed nozzles 22 is preferably done pneumatically.
  • the delivery flow from the delivery vessels 18, which is initially brought in via a main delivery line 24, is for this purpose divided into individual delivery lines 29 in a distributor 2G, and is supplied to the individual feed nozzles 22 via these delivery lines 28.
  • the delivery flow can be regulated via a control valve 30 in the main delivery line 24.
  • control valves can be provided in the various partial delivery lines.
  • the solid Immediately after entering the loosening vessel 10, the solid passes into the fluidized bed 20. If new solid is continuously introduced above the inflow base 12, the fluidized bed 20 that is formed expands at a correspondingly high pressure of the loosening gas due to its fluid-like Chen properties in the vertical direction, ie the thickness of the loosened layer increases. In this way, high fluidized bed thicknesses can be achieved.
  • a discharge device 30 for the solid is arranged in the upper region of the loosening vessel 10.
  • This generally comprises a discharge container 32 which is connected to the loosening vessel 10 via an opening 34 in the wall of the loosening vessel 10.
  • the loosened solid flows through the opening 34 into the discharge container 32 and can be discharged from it via a lock system, for example a cell wheel lock 36.
  • the solid introduced immediately above the inflow base 12 consequently traverses the fluidized bed 20 from bottom to top and is discharged in the upper region of the loosening vessel 10.
  • heat exchanger tubes 38 are arranged, which extend through the fluidized bed 20 formed.
  • the heat exchanger tubes 38 extend in the vertical direction and are preferably guided straight out of the loosening vessel 10 at the upper and lower ends thereof, for example by being guided through the inflow base 12 at the lower end. In this way, the heat exchanger tubes 38 run essentially parallel to the flow de? Loosening gas so that the formation of the fluidized bed 20 can take place largely undisturbed and the wear on the heat exchanger tubes 38 is minimized.
  • the heat exchanger tubes 38 are acted upon by a heat carrier supply (not shown).
  • the heat transfer medium comprises, for example, a hot gas or a thermal oil, and heat is to be removed from the solid, a cooling liquid.
  • the heat exchanger tubes 38 are preferably flowed through by the heat transfer medium from top to bottom (represented by arrow 40). The heat transfer medium and the solid are thus moved past each other in counterflow, the heat exchange performance is maximized lubricated.
  • the heat exchange surface required for a given heat exchange output is formed by a correspondingly large thickness of the fluidized bed 20 in the vertical.
  • the base area of the inflow base 12 is reduced with an increased loosening gas inlet pressure.
  • the loosening gas volume flow becomes smaller, its possibly unfavorable influence on the heat balance (for example due to the cooling effect in a solid to be heated) is reduced, the effort for separating loosening gas and entrained gas Solid matter, after the fluidized bed 20, becomes smaller.
  • the loosening vessel 10 is advantageously designed as a pressure vessel. This can be achieved with little effort due to the reduced footprint of the inflow floor 12.
  • the fluidized bed 20 is then operated as a whole under excess pressure, which improves the convection and optimizes the heat exchange.
  • the excess pressure of the loosening gas still available on the discharge device enables effective cleaning of the loosening gas with little effort, e.g. in a cyclone 42.
  • FIG. 1 A second embodiment of the heat exchange device is shown in FIG.
  • This system comprises several tubular loosening vessels 10, which preferably extend through a heat exchanger 44 which can be acted upon by a heat transfer medium.
  • the heat exchanger 44 preferably has a plurality of heat exchanger tubes 38, each loosening vessel 10 extending through one of the heat exchanger tubes 38.
  • the heat exchanger tubes 38 are acted upon by a heat transfer medium from the heat transfer medium supply and flow through it, so that heat transfer takes place through the wall of the loosening vessels 10.
  • the entry of the fine-grained, flowable and loosening bulk material into the individual loosening vessels 10 takes place, similarly as in the embodiment according to FIG in the upper porous wall of the inflow base 12.
  • the bulk material is also preferably transported pneumatically to the individual entry nozzles.
  • the loosening vessels 10 preferably open into a collecting container 46, in which the solid is brought together again in the individual loosening vessels 10 after the heat exchange with the heat transfer medium and, if necessary, mixed to homogenize the temperature conditions.
  • the solid is held in the collecting container 46 in the loosened state, optionally with additional introduction of loosening gas, so that a fluidized bed 20 is formed in the collecting container 46.
  • a discharge device 30 for the solid which is connected to the collecting container via an opening 34 in the wall of the latter. It is, for example, the same device as is used in the embodiment in FIG. 1.
  • the loosening vessels 10 are advantageously designed as pressure vessels. This can be achieved with little effort due to the small footprint of the inflow floor 12.
  • the fluidized bed 20 in the respective loosening vessels 10 is then operated as a whole under excess pressure, which improves the convection and optimizes the heat exchange.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Dispositif destiné à l'échange de chaleur entre un agent porteur de chaleur et une matière solide, dans lequel un fluide de fluidisation peut être introduit dans la matière solide de manière telle que cette dernière forme avec le fluide de fluidisation un lit fluidisé (20) et que la matière solide fluidisée et l'agent porteur de chaleur soient acheminés par passage côte à côte. Selon la présente invention, la matière solide et l'agent porteur de chaleur sont acheminés essentiellement dans le sens vertical. Ledit dispositif comprend de préférence au moins une cuve de fluidisation (10) dans laquelle peut être introduite la matière solide, et dans laquelle le fluide de fluidisation peut être introduit dans la matière solide de telle manière que cette dernière forme un lit fluidisé (20) avec le fluide de fluidisation, ainsi qu'un échangeur de chaleur (38) qui est alimenté avec l'agent porteur de chaleur. Dans une première variante, l'échangeur de chaleur (38) s'étend de manière essentiellement verticale à travers au moins une cuve de fluidisation (10), tandis que dans une deuxième variante, la cuve de fluidisation (10) au moins s'étend de manière essentiellement verticale à travers l'échangeur de chaleur (38).
PCT/EP1998/007236 1997-11-12 1998-11-12 Dispositif destine a l'echange de chaleur entre un fluide porteur de chaleur et une matiere solide Ceased WO1999024773A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU18722/99A AU1872299A (en) 1997-11-12 1998-11-12 Device enabling heat exchange between a heat carrying fluid and a solid

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
LU90165 1997-11-12
LU90165A LU90165B1 (en) 1997-11-12 1997-11-12 Apparatus for heat exchange between a heat carrying fluid and a solid material
LU90220 1998-03-04
LU90220A LU90220B1 (de) 1998-03-04 1998-03-04 Vorrichtung zum Waermeaustausch zwischen einem Waermetraegerfluid und einem Feststoff

Publications (1)

Publication Number Publication Date
WO1999024773A1 true WO1999024773A1 (fr) 1999-05-20

Family

ID=26640366

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/007236 Ceased WO1999024773A1 (fr) 1997-11-12 1998-11-12 Dispositif destine a l'echange de chaleur entre un fluide porteur de chaleur et une matiere solide

Country Status (3)

Country Link
AU (1) AU1872299A (fr)
DE (1) DE19851997A1 (fr)
WO (1) WO1999024773A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU90888B1 (de) * 2002-02-01 2003-08-04 Wurth Paul Sa Verfahren und Vorrichtungen zum Erwaermen eines kontinuierlichen Feststoffstroms

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1515106A1 (fr) * 2003-09-09 2005-03-16 Paul Wurth S.A. Echangeur de chaleur pour appareil de convoyage pneumatique
DE102009014786A1 (de) 2008-08-18 2010-02-25 Coperion Gmbh Bearbeitungsanlage für Schüttgut

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1350734A (fr) * 1962-12-04 1964-01-31 Perfectionnements aux échangeurs de chaleur
US4063589A (en) * 1974-03-21 1977-12-20 Coal Industry (Patents) Limited Heat exchanger assemblies
US4220193A (en) * 1977-04-12 1980-09-02 Esmil, B.V. Method and equipment for heat exchange
GB2077615A (en) * 1980-06-07 1981-12-23 Worsley G P & Co Ltd Fluidised bed heat exchangers
EP0063834A1 (fr) * 1981-04-24 1982-11-03 Esmil B.V. Echangeur de chaleur pour l'échange de chaleur entre liquides
WO1994024507A1 (fr) * 1993-04-20 1994-10-27 Bronswerk Heat Transfer B.V. Appareil pour la mise en ×uvre d'un processus physique et/ou chimique, par exemple un echangeur thermique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1350734A (fr) * 1962-12-04 1964-01-31 Perfectionnements aux échangeurs de chaleur
US4063589A (en) * 1974-03-21 1977-12-20 Coal Industry (Patents) Limited Heat exchanger assemblies
US4220193A (en) * 1977-04-12 1980-09-02 Esmil, B.V. Method and equipment for heat exchange
GB2077615A (en) * 1980-06-07 1981-12-23 Worsley G P & Co Ltd Fluidised bed heat exchangers
EP0063834A1 (fr) * 1981-04-24 1982-11-03 Esmil B.V. Echangeur de chaleur pour l'échange de chaleur entre liquides
WO1994024507A1 (fr) * 1993-04-20 1994-10-27 Bronswerk Heat Transfer B.V. Appareil pour la mise en ×uvre d'un processus physique et/ou chimique, par exemple un echangeur thermique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU90888B1 (de) * 2002-02-01 2003-08-04 Wurth Paul Sa Verfahren und Vorrichtungen zum Erwaermen eines kontinuierlichen Feststoffstroms
WO2003064950A1 (fr) * 2002-02-01 2003-08-07 Paul Wurth S.A. Procedes et dispositifs permettant de chauffer un flux continu de matiere solide
AU2003209752B2 (en) * 2002-02-01 2007-03-29 Paul Wurth S.A. Methods and devices for heating a continuous flow of solids

Also Published As

Publication number Publication date
DE19851997A1 (de) 1999-05-20
AU1872299A (en) 1999-05-31

Similar Documents

Publication Publication Date Title
DE3147864C2 (de) Abwärmekessel für die Kühlung von Synthesegas
DE69416458T2 (de) Verfahren und Vorrichtung zur Behandlung oder zur Verwendung eines Heissgasstromes
DE69014522T2 (de) Verfahren und apparat zur entkoksung von dampfkrackanlagen.
DE69317002T2 (de) Methode und vorrichtung zur wärmegewinnung in einem wirbelbettreaktor
DE3144863C2 (de) Wärmetauscher mit Fließbett
DE69417103T2 (de) Verfahren und Vorrichtung zur Behandlung oder zur Verwendung eines Heissgasstromes
DE69000262T2 (de) Verfahren und apparat zur regelung oder steuerung des erhitzungsgrades eines koernigen feststoffes, insbesondere eines wirbel- oder wanderbettwaermetauschers mit mehreren kammern.
DE69628280T2 (de) Wirbelbettanordnung mit durchflussausgleich
WO2011015339A1 (fr) Procédé et dispositif de refroidissement d'une matière solide en vrac à grain fin avec échange simultané du gaz d'espace vide contenu dans celle-ci
DE2119463C3 (de) Vorrichtung zum Wärmeaustausch zwischen zwei Gasen
DE2019210A1 (de) Vorrichtung zur Abtrennung von Katalysatorteilchen
DE69225230T2 (de) Verfahren zum entfernen von niederschlägen an den wänden der einlassrohrleitung eines gaskühlers sowie einlassrohrleitung für gaskühler mit gekühlter elastischer metallstruktur
DE3432864A1 (de) Waermetauscher fuer die physikalische und/oder chemische behandlung einer fluessigkeit
EP0407730B1 (fr) Foyer, notamment foyer à lit fluidisé
DE3831385C2 (de) Verfahren und Vorrichtung zum Betreiben eines Rohrbündel-Apparates
DE1751027A1 (de) Waermetauscher mit einer als Zwischenwaermetraeger dienenden Fluessigkeit
DE1451233A1 (de) Auflockerungswaermetauscher in einem Gehaeuse fuer pulverfoermige Feststoffe
DE4142814A1 (de) Auf umlaufmassentechnik basierendes verfahren zum abkuehlen von gasen und beim verfahren verwendbarer umlaufmassenkuehler
WO1999024773A1 (fr) Dispositif destine a l'echange de chaleur entre un fluide porteur de chaleur et une matiere solide
DD296423A5 (de) Verfahren und vorrichtung zum abtrennen von feststoffen aus einem gas
DE10319625B3 (de) Verfahren und Anlage zur Wärmebehandlung von eisenoxidhaltigen Feststoffen
CH496628A (de) Verfahren und Vorrichtung zur Trocknung von Abwasserschlämmen mittels eines heissen gasförmigen Mediums
DE1124472B (de) Verfahren und Vorrichtung zur Herstellung von Siliciumdioxyd
DE60030245T2 (de) Verfahren und Vorrichtung zur Entstaubung einer Reaktionszone
DE2905281A1 (de) Anordnung fuer die zufuhr und verteilung von staubhaltigem gas

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: CA

122 Ep: pct application non-entry in european phase