DE8902839U1 - Heatable fluidized bed for sintering or calcining agglomerating bulk materials - Google Patents
Heatable fluidized bed for sintering or calcining agglomerating bulk materialsInfo
- Publication number
- DE8902839U1 DE8902839U1 DE8902839U DE8902839U DE8902839U1 DE 8902839 U1 DE8902839 U1 DE 8902839U1 DE 8902839 U DE8902839 U DE 8902839U DE 8902839 U DE8902839 U DE 8902839U DE 8902839 U1 DE8902839 U1 DE 8902839U1
- Authority
- DE
- Germany
- Prior art keywords
- sintering
- fluidized bed
- calcining
- agglomerating
- bulk materials
- 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
Links
- 239000000463 material Substances 0.000 title claims description 9
- 238000005245 sintering Methods 0.000 title claims description 8
- 238000001354 calcination Methods 0.000 title claims description 7
- 239000000843 powder Substances 0.000 description 7
- 239000013590 bulk material Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
- B01J8/245—Spouted-bed technique
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/001—Calcining
- B01J6/004—Calcining using hot gas streams in which the material is moved
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Description
Beheizbares Fließbett zum Sintern oder Kalzinieren von agglomerierenden SchüttgüternHeatable fluidized bed for sintering or calcining agglomerating bulk materials
Die Erfindung betrifft ein beheizbares Fließbett zum Sintern oder Kalzinieren von agglomerierenden Schüttgütern, bestehend ausThe invention relates to a heatable fluidized bed for sintering or calcining agglomerating bulk materials, consisting of
a) einem Rohr für den Gaseiniaß &eegr; it einer im unteren Ende eingesetzten Fritte,a) a tube for the gas inlet with a frit inserted in the lower end,
b) einem Expansiortsteil, der in seinem oberen Bereich einen Gas&'jslaß aufweist,b) an expansion part which has a gas outlet in its upper part,
c) einem kegelförmigen Zwischenteil, der das obere Ende des Hohrs mit. dem Expansi^risteil verbindet.c) a conical intermediate part which connects the upper end of the tube with the expansion part.
Derartige Fließbetten sind bekannt.Such fluidized beds are well known.
Beim Sintern oder Kalzinieren von Schüttgütern, insbesondere von Pulvern, besteht die Notwendigkeit, das Gut ständig in Bewegung zu halten, um ein Verkleben oder Zusammensintern der einzelnen Teile zu verhindern.When sintering or calcining bulk materials, especially powders, it is necessary to keep the material constantly moving in order to prevent the individual parts from sticking or sintering together.
Diese Aufgabe wird erfindungsgemäß durch ein Fließbett gelöst, das durch folgende Merkmale gekennzeichnet ist:This object is achieved according to the invention by a fluidized bed, which is characterized by the following features:
- der Abstand von Fritte 2 und Gasauslaß 4 beträgt das 10 bis 15-fache der Länge des Rohrs 1;- the distance between frit 2 and gas outlet 4 is 10 to 15 times the length of tube 1;
- der Durchmesser des Expansionsteils 3 beträgt das 5- bis 8-fache des Durchmessers des Rohrs 1;- the diameter of the expansion part 3 is 5 to 8 times the diameter of the pipe 1;
- fier Winkel, den die Hände des kegelförmigen Zwischenteils 5 miteinander bilden, liegt im Bereich zwischen 15 und 35*.- the angle that the hands of the conical intermediate part 5 form with each other is in the range between 15 and 35*.
Mit dem erfindungsgemäßen Fließbett können Pulver, die zum Agglomerieren neigen, zuverlässig gesintert und kalziniert werden, ohne daß die Körner miteinander verkleben.With the fluidized bed according to the invention, powders that tend to agglomerate can be reliably sintered and calcined without the grains sticking together.
Dabei ist der Gasdurchsatz so zu wählen, daß das Pulver ständig in Bewegung gehalten wird und die Kontaktzeiten der Körner möglichst kurz sind.The gas flow rate must be selected so that the powder is constantly kept in motion and the contact times of the grains are as short as possible.
Das erfindungsgeiaäße Fließbett, wird im folgenden anhand der Figur näher beschrieben.The fluidized bed according to the invention is described in more detail below with reference to the figure.
üas Fließbett enthält ein kurzes Rohrstück 1, in das eine Fritte 2 eingelassen ist; sie dient gleichzeitig a.2 v, Barriere für das Schüttgut. Durch die Fritte wird ein gleichmäßiger Gasstrom erzielt. An dan freien, oberen Enden des Rohrstücks schließt sich ein Zwischenteil 5 in Form eines schlanken Kegels an. Das Zwischenteil verbindet das Rohr 1 mit dem Expansionsteil 3 der Vorrichtung. Der Expansionsteil 3 enthält in seinem oberen Bereich, vorzugsweise in der Symmetrieachse angeordnet, den Gasauslaß 4.The fluidized bed contains a short pipe section 1 into which a frit 2 is embedded; this also serves as a barrier for the bulk material. The frit ensures a uniform gas flow. An intermediate part 5 in the form of a slender cone is connected to the free, upper ends of the pipe section. The intermediate part connects the pipe 1 to the expansion part 3 of the device. The expansion part 3 contains the gas outlet 4 in its upper region, preferably arranged in the axis of symmetry.
Die Vorrichtung ist in ihrer ganzen Länge beheizbar. Für die Eignung des erfindungsgemäßen Fließbettes zur Sinterung öder Kalzinierung von agglomerierenden Pulvern ist es wesentlich, daß folgende Parameter eingehalten werden:The device can be heated along its entire length. For the suitability of the fluidized bed according to the invention for sintering or calcining agglomerating powders, it is essential that the following parameters are observed:
i< = 10 ... 15i< = 10 ... 15
fi -s 5 ... 8
dfi -s 5 ... 8
d
&agr; = 25 ± 10*α = 25 ± 10*
Dao Schüttgut wird durch den Pulvereinlaß 6 in die Vorrichtung eingefüllt und durch den Gasstrom aufgewirbelt. Der Gasstrom wird so bemessen, daß das Gut nicht den oberen Bereich d*r Vorrichtung erreicht. Nach Abschluß der Kalzinierung oder Sinterung wird der Gasstrom erhöht und das Grt durch den GasaiiR-laß ausgetragen, wobei der Pulvereinlaß 6 geschlossen ist. Zweckmäßigerweise schließt sich an den Gasauslaß ein Zyklon an, in den das Gut eingetragen wird.The bulk material is filled into the device through the powder inlet 6 and swirled up by the gas flow. The gas flow is measured so that the material does not reach the upper area of the device. After calcination or sintering has been completed, the gas flow is increased and the material is discharged through the gas outlet, with the powder inlet 6 closed. A cyclone into which the material is fed is expediently connected to the gas outlet.
LegendeLegend
1 Rohr1 pipe
2 Fritte2 Frit
3 Expansioneteil3 Expansion part
4 Gasauslaß4 Gas outlet
5 Zwischenteil5 Intermediate part
6 Pulvereinlaß6 Powder inlet
L Abstand von Fritte 2 und Gasauslaß 4L Distance between frit 2 and gas outlet 4
] Länge des Rohrs] Length of pipe
D Durchmesser des Expansionsteils 3D Diameter of expansion part 3
d Durchmesser des Rohrsd Diameter of the pipe
&agr; Winkel der Wände des Zwischenteils&agr; Angle of the walls of the intermediate part
Claims (1)
Karlsruhe GmbH
ANR 1002597Kerr Research Center
Karlsruhe GmbH
ANR 1002597
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8902839U DE8902839U1 (en) | 1989-03-08 | 1989-03-08 | Heatable fluidized bed for sintering or calcining agglomerating bulk materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8902839U DE8902839U1 (en) | 1989-03-08 | 1989-03-08 | Heatable fluidized bed for sintering or calcining agglomerating bulk materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE8902839U1 true DE8902839U1 (en) | 1989-05-03 |
Family
ID=6836860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8902839U Expired DE8902839U1 (en) | 1989-03-08 | 1989-03-08 | Heatable fluidized bed for sintering or calcining agglomerating bulk materials |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE8902839U1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2676375A1 (en) * | 1991-05-14 | 1992-11-20 | Gignier Jean | Process and device for using a chemical reaction |
| WO1994029015A1 (en) * | 1990-06-28 | 1994-12-22 | Liquid Carbonic Inc. | Apparatus for direct fluorination of polymeric resins |
-
1989
- 1989-03-08 DE DE8902839U patent/DE8902839U1/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994029015A1 (en) * | 1990-06-28 | 1994-12-22 | Liquid Carbonic Inc. | Apparatus for direct fluorination of polymeric resins |
| FR2676375A1 (en) * | 1991-05-14 | 1992-11-20 | Gignier Jean | Process and device for using a chemical reaction |
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