EP0595378A1 - Réacteur pour sécher des solides aqueux dans un lit fluidisé chauffé et procédé d'opération pour le réacteur - Google Patents

Réacteur pour sécher des solides aqueux dans un lit fluidisé chauffé et procédé d'opération pour le réacteur Download PDF

Info

Publication number: EP0595378A1
Authority: EP; European Patent Office
Prior art keywords: reactor; fluidized bed; distributor surface; vapor; distributor
Prior art date: 1992-09-25
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

EP93202451A

Other languages

German (de)

English (en)

Other versions

EP0595378B1 (fr

Inventor

Hans-Jürgen Dr. Weiss

Wolfgang Frank

Wladislaw Lewandowski

Wolfgang Scheler

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.)

GEA Group AG

Original Assignee

Metallgesellschaft AG

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.)

1992-09-25

Filing date

1993-08-19

Publication date

1994-05-04

1993-08-19 Application filed by Metallgesellschaft AG filed Critical Metallgesellschaft AG

1994-05-04 Publication of EP0595378A1 publication Critical patent/EP0595378A1/fr

1996-11-20 Application granted granted Critical

1996-11-20 Publication of EP0595378B1 publication Critical patent/EP0595378B1/fr

2013-08-19 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Images

Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods

Definitions

the invention relates to a reactor for drying a water-containing solid in a heated fluidized bed, a vapor collecting space with a vapor outlet being located above the fluidized bed and a feed device for the water-containing solid being arranged above the vapor collecting space, and a method for operating the reactor.
Reactors of this type are known, e.g. described in German patent 29 01 723 and in the corresponding US patent 4,295,281 as well as in German patent 36 44 806 and in DE-A-39 43 366. These publications do not deal with how to apply the water-containing solids, which preferably form lumps on delivery, to the fluidized bed as finely and uniformly as possible.
a rotating, plate-like disk is known from US Pat. No. 2,412,057 in order to eject material to be dried to the side from an inlet channel.
the invention has for its object to separate the water-containing solids in the vapor collection space in a simple and effective manner in the reactor mentioned at the outset in such a way that larger lumps are destroyed.
the solids should be distributed as evenly as possible over the top of the fluidized bed. According to the invention, this is achieved in that an approximately conical distributor surface which can be rotated about a vertical axis is arranged in the vapor collecting space below the feed device and has a slope corresponding to an angle of 25 to 70 ° measured against the horizontal and at least one recess which is 30 to 90%. the theoretical total area of the distributor area.
the approximately conical distributor surface is not closed, but has one or more recesses through which a part of the solids comes from the distributor surface. These solids falling through the recess or recesses are moved less far radially outwards by the rotating distributor surface, so that the central region of the fluidized bed lying below the distributor surface can also be acted upon fairly uniformly with solids in the same way as the outer regions. Nevertheless, the distributor surface also acts as a baffle here, which breaks up larger agglomerates of the solids falling from above.
the vapor collection space is usually at least 80% and often about 100% saturated with water vapor.
This water vapor comes into contact with the water-containing, cold solids above the distributor surface and condenses on its surface. This favors the formation of agglomerates, which is counteracted by the rotating distributor surface.
the speed of rotation is usually in the range of 20 to 250 revolutions per minute.
the granular solids to be dried may e.g. to deal with coal, lignite, sand, ores or sludges of all kinds.
the distributor surface preferably has a largest diameter of 0.1 to 0.4 times the diameter of the top of the fluidized bed.
protrusions can be, for example, cams, teeth or ribs.
water-containing, granular solids are dried in a fluidized bed (2) which is indirectly heated by a heat exchanger device (3).
Superheated steam is preferably used as the fluidizing medium, which is brought in through the line (4) and passed into the fluidized bed (2) via a nozzle grate (5), which can be formed, for example, by horizontal pipes.
the water vapor formed by the drying collects together with the fluidizing medium in the vapor collecting space (8) above the fluidized bed (2), the vapor-rich atmosphere being drawn off through the vapor outlet (9). Solids that have largely dried are removed at the lower end of the reactor (1) through a metering lock (10).
the solids to be dried are passed through an inlet lock (11) into a storage chamber (12), the bottom (13) of which has an outlet opening (14), cf. also Fig. 2.
a sickle pusher (16) which is moved above the bottom (13) in the direction of arrow (15), pushes the solids to the outlet (14).
the vertical shaft (18) is also guided through the outlet (14), at the lower end of which an approximately conical distributor surface (19) is attached.
the distributor surface (19) can be driven in a manner known per se, not shown, by means of a drive about a vertical axis with adjustable speed via the shaft (18) guided to the outside.
the rotary movement of the distributor surface (19) takes place independently of the movement of the sickle slide (16), to which a separate drive (not shown) belongs.
FIG. 3 and 4 show one possibility of the shape of the distributor surface (19), with FIG. 3 being a perspective 4 and a plan view seen in the direction of arrow (B) in FIG. 3.
the conical distributor surface (19) has two recesses (20a) and (20b), so that the surface (19) is partially perforated.
the shape of these recesses can vary within a wide range, and a distributor surface can also have only one or more recesses. Without these recesses, the largest diameter of the distributor surface (19) would describe a circle, cf. Fig. 4, where this circle is indicated by dashed lines in the region of the recesses (20a) and (20b).
the closed circle thus formed limits the total theoretical area of the distributor area (19); the recesses are not taken into account for this theoretical total area.
the recesses themselves comprise an area which corresponds to 30 to 90% of the theoretical total area of the distributor area (19).
the size and shape of the recesses (20a) and (20b) can be selected differently, so that the design of the distributor surface can be adapted to different tasks.
the distributor surface (19) usually has a largest diameter (D), cf. Fig. 4, from 0.1 to 0.4 times the diameter of the top of the fluidized bed (2).
Fig. 5 shows a slightly different shaped distributor surface (19a), which is preferably rotated in the direction of arrow (22) around the vertical shaft (18).
the recesses (23a) and (23b) are delimited on the outside by the dashed circular line which marks the largest diameter.
This distributor surface (19a) also shows how the top of the distributor surface e.g. can be equipped with cams (23) or ribs (24), on the one hand to reinforce the breaking up of lumps of solid when rotating the surface (19a) and on the other hand to influence the solids flow. Projections of this type can improve the uniform distribution of the solids on the fluidized bed (2).

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Life Sciences & Earth Sciences (AREA)
Microbiology (AREA)
Drying Of Solid Materials (AREA)
Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

EP93202451A 1992-09-25 1993-08-19 Réacteur pour sécher des solides aqueux dans un lit fluidisé chauffé et procédé d'opération pour le réacteur Expired - Lifetime EP0595378B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE4232110A DE4232110A1 (de)	1992-09-25	1992-09-25	Reaktor zum Trocknen wasserhaltiger Feststoffe in einem beheizten Wirbelbett und Verfahren zum Betreiben des Reaktors
DE4232110		1992-09-25

Publications (2)

Publication Number	Publication Date
EP0595378A1 true EP0595378A1 (fr)	1994-05-04
EP0595378B1 EP0595378B1 (fr)	1996-11-20

Family

ID=6468799

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP93202451A Expired - Lifetime EP0595378B1 (fr)	1992-09-25	1993-08-19	Réacteur pour sécher des solides aqueux dans un lit fluidisé chauffé et procédé d'opération pour le réacteur

Country Status (7)

Country	Link
US (1)	US5325607A (fr)
EP (1)	EP0595378B1 (fr)
AU (1)	AU661197B2 (fr)
CA (1)	CA2101368A1 (fr)
DE (2)	DE4232110A1 (fr)
ES (1)	ES2094467T3 (fr)
GR (1)	GR3021754T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2001069150A1 (fr) *	2000-03-13	2001-09-20	Energy Engineering International (Pty) Ltd.	Procede de production de produits particulaires

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
AU747195B2 (en) *	1997-03-26	2002-05-09	Evergreen Energy Inc.	Liquid/gas/solid separation
AUPO589097A0 (en) *	1997-03-26	1997-04-24	Technological Resources Pty Limited	Liquid/gas/solid separation
US6601315B2 (en)	2000-12-14	2003-08-05	Bausch & Lomb Incorporated	Combined fluidized bed dryer and absorption bed

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE156981C (fr) *
US2412057A (en) *	1944-03-06	1946-12-03	Charles W Nichols Jr	Furnace construction
US2668041A (en) *	1949-04-12	1954-02-02	Knibbs Norman Victor Syndney	Heat treatment of finely divided solids
DE2217578A1 (de) *	1971-04-16	1972-11-02	Aktieselskabet Niro Atomizer, Soeborg (Dänemark)	Vorrichtung zum Trocknen feuchter Pulver und Verfahren zum Betreiben einer derartigen Vorrichtung
US4492040A (en) *	1980-11-20	1985-01-08	A/S Niro Atomizer	Method and apparatus for drying a pulverulent or particulate product

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
AU4296978A (en) *	1978-02-10	1979-08-16	Monash University	Drying particulate materials
US4423558A (en) *	1978-09-21	1984-01-03	St. Gobain Vitrage	Device for heat exchange between solid particles and a gas current
LU86335A1 (fr) *	1986-03-04	1987-11-11	Wurth Paul Sa	Installation de chargement d'un four a cuve
DK222686D0 (da) *	1986-05-14	1986-05-14	Rockwool Int	Mineraluldsfremstilling
DD282509A5 (de) *	1989-04-18	1990-09-12	Orgreb Inst Kraftwerke	Verfahren und vorrichtung zum trocknen von feststoffmaterialien in einem indirekt beheizten wirbelschichtbett
US5243767A (en) *	1992-07-30	1993-09-14	Peter Stein	Method and apparatus for processing particulate material

1992
- 1992-09-25 DE DE4232110A patent/DE4232110A1/de not_active Withdrawn
1993
- 1993-07-27 CA CA002101368A patent/CA2101368A1/fr not_active Abandoned
- 1993-08-19 ES ES93202451T patent/ES2094467T3/es not_active Expired - Lifetime
- 1993-08-19 DE DE59304537T patent/DE59304537D1/de not_active Expired - Fee Related
- 1993-08-19 EP EP93202451A patent/EP0595378B1/fr not_active Expired - Lifetime
- 1993-09-14 US US08/122,030 patent/US5325607A/en not_active Expired - Lifetime
- 1993-09-23 AU AU47546/93A patent/AU661197B2/en not_active Ceased
1996
- 1996-11-21 GR GR960402938T patent/GR3021754T3/el unknown

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE156981C (fr) *
US2412057A (en) *	1944-03-06	1946-12-03	Charles W Nichols Jr	Furnace construction
US2668041A (en) *	1949-04-12	1954-02-02	Knibbs Norman Victor Syndney	Heat treatment of finely divided solids
DE2217578A1 (de) *	1971-04-16	1972-11-02	Aktieselskabet Niro Atomizer, Soeborg (Dänemark)	Vorrichtung zum Trocknen feuchter Pulver und Verfahren zum Betreiben einer derartigen Vorrichtung
US4492040A (en) *	1980-11-20	1985-01-08	A/S Niro Atomizer	Method and apparatus for drying a pulverulent or particulate product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2001069150A1 (fr) *	2000-03-13	2001-09-20	Energy Engineering International (Pty) Ltd.	Procede de production de produits particulaires

Also Published As

Publication number	Publication date
ES2094467T3 (es)	1997-01-16
CA2101368A1 (fr)	1994-03-26
AU4754693A (en)	1994-03-31
GR3021754T3 (en)	1997-02-28
EP0595378B1 (fr)	1996-11-20
DE59304537D1 (de)	1997-01-02
US5325607A (en)	1994-07-05
AU661197B2 (en)	1995-07-13
DE4232110A1 (de)	1994-03-31

Publication	Publication Date	Title
EP0225351B1 (fr)	1988-11-09	Appareil de sechage de boues de curage
DE2456321B2 (de)	1980-07-24	Wärmetauscher
DE1567852A1 (de)	1970-06-11	Vorrichtung und Verfahren zur Herstellung von Aktivkohle
DE2506005B2 (de)	1981-05-21	Austragvorrichtung für einen Schüttgutbunker
EP1337321A1 (fr)	2003-08-27	Reacteur en puits a cone de decharge gaze
DE2558730C3 (de)	1982-04-22	Verfahren zum Kristallisieren und Trocknen von Polyethylenterephthalat und Vorrichtung zur Durchführung des Verfahrens
DD151881A5 (de)	1981-11-11	Vorrichtung zur befeuchtung von salzgranulaten
EP0595378B1 (fr)	1996-11-20	Réacteur pour sécher des solides aqueux dans un lit fluidisé chauffé et procédé d'opération pour le réacteur
CH636069A5 (de)	1983-05-13	Verfahren zur umwandlung von tierischen exkrementen und klaerschlaemmen in geruchlose feststoffe.
DE69916328T2 (de)	2005-05-04	Vorrichtung zum dispergieren von schüttgut im innenraum eines behälters
CH430397A (de)	1967-02-15	Gravimetrische Ausgleichseinrichtung für Schüttgüter
DE2415593C2 (de)	1987-01-22	Silo zum Speichern von schüttfähigem, jedoch schwerfließendem Gut
DE1022609B (de)	1958-01-16	Vorrichtung zum Granulieren von Rohphosphat, Kalkstein und sonstigem feinkoernigem Gut
DE102005015236A1 (de)	2006-10-05	Zweischeibenstreuer für Streugut, insbesondere Dünger, Salz oder dergleichen
DE2118231C3 (de)	1980-07-10	Drehtrommel zum Granulieren schüttfähiger, feinkörniger und/oder staubförmiger Materialien
EP0756572A1 (fr)	1997-02-05	Dispositif de prelevement dose de solides en vrac
DE19645910C2 (de)	1998-12-03	Anlage zum Trocknen von feinkörnigen Schüttgütern
DE2608712B1 (de)	1977-01-27	Vorrichtung zur behandlung von koernigen festgut mit fliessfaehigen medien
CH627665A5 (en)	1982-01-29	Appliance for treating pulverulent, granular and lumpy solids
DE649036C (de)	1937-08-14	Verfahren und Vorrichtung zum kontinuierlichen Destillieren von Trestern
DE480980C (de)	1929-08-13	Vorrichtung zum Wegschaffen der Asche und Schlacken aus Feuerungen mit bewegten Rosten
DE194146C (fr)
DE598012C (de)	1934-06-04	Vorrichtung zur Fuehrung von Gasen in bewegten, vorzugsweise umlaufenden Behaeltern, Trommeln, Drehrohroefen o. dgl.
DE2026728C3 (de)	1976-06-16	Drehtrommel zur Herstellung von Düngemitteln aus halbflüssigen organischen Abfallstoffen
DE2454707C2 (de)	1976-05-13	Austrageanordnung für Schachtöfen

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EP0595378A1 - Réacteur pour sécher des solides aqueux dans un lit fluidisé chauffé et procédé d'opération pour le réacteur - Google Patents

Info

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Images

Classifications

Definitions

Landscapes

Applications Claiming Priority (2)

Publications (2)

Family

ID=6468799

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (3)

Citations (5)

Family Cites Families (6)

Patent Citations (5)

Cited By (1)

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