DE8803700U1 - Tubular reactor, especially for the high-temperature digestion of boehmite- and diaspora-containing bauxites - Google Patents
Tubular reactor, especially for the high-temperature digestion of boehmite- and diaspora-containing bauxitesInfo
- Publication number
- DE8803700U1 DE8803700U1 DE8803700U DE8803700U DE8803700U1 DE 8803700 U1 DE8803700 U1 DE 8803700U1 DE 8803700 U DE8803700 U DE 8803700U DE 8803700 U DE8803700 U DE 8803700U DE 8803700 U1 DE8803700 U1 DE 8803700U1
- Authority
- DE
- Germany
- Prior art keywords
- tubular reactor
- compensator
- tube
- reactor according
- section
- 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
- 230000029087 digestion Effects 0.000 title description 7
- 229910001593 boehmite Inorganic materials 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 238000000137 annealing Methods 0.000 claims 2
- 206010039509 Scab Diseases 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 244000309464 bull Species 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0073—Sealings
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
- B01J19/2415—Tubular reactors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
- F16L59/21—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for expansion-compensation devices
-
- 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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00094—Jackets
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
Bonn, den 15.03.1988. ,Bonn, 15.03.1988. ,
für den Wr^ 1 1 wf>TTw böbait- und diasporh<iger Bauxite.for the Wr^ 1 1 w f > T Tw of bauxites containing bacite and diaspora.
ing;ing;
Die Erfindung betrifft einen Rohrreaktor, insbesondere für den HochtemperaturaufSchluß böhmit- und dia&tporhaltiger Bauxite, bestehend aus einem Aufschlußteil, einer Verweilzeit- und Kühlstrecke.. The invention relates to a tubular reactor, in particular for the high-temperature digestion of boehmite- and diatomaceous bauxites, consisting of a digestion section, a residence time section and a cooling section.
DE-AS 19 37 392 (VAW) bekannt. In diesen Reaktor können alle Mineralien und Erze, die in den entsprechenden Reagenzien lösliche Bestandteile aufweisen, insbesondere Bauxit mit Natronlauge, aufgeschlossen werden.DE-AS 19 37 392 (VAW). All minerals and ores that contain soluble components in the corresponding reagents, especially bauxite with caustic soda, can be digested in this reactor.
Beim Betrieb eiaes Rohrreaktors der eingangs genannten Art können Verkrustungen im Rohr auftreten, die den weiteren Aufschluß behindern. Die Behinderung besteht im wesentlichen darin, daß durch die aufwachsenden Krusten eine rauhe Oberfläche an der Innenwand des Rohrreaktors entsteht. Durch die auftretende Querschnittsverengung steigt die Strömungsgeschwindigkeit der *ufschlußsuspeneion stark an. Im Extremfalle führt dies dazu, daß die Kruste den Durchmesser des Rohrreaktor&bgr; so stark verengt, daß eine wirtschaftliche Betriebsweise nicht mehr möglich ist.When operating a tubular reactor of the type mentioned above, incrustations can form in the tube, which hinder further digestion. The hindrance essentially consists in the fact that the growing crusts create a rough surface on the inner wall of the tubular reactor. The resulting narrowing of the cross-section causes the flow velocity of the digestion suspension to increase sharply. In extreme cases, this leads to the crust narrowing the diameter of the tubular reactor so much that economic operation is no longer possible.
&Lgr; Aufgabe der vorliegenden Erfindung ist es, einen Rohrreaktor insbesondere für den Botrieb mit buhmit- und diasporhaltigen Bauxiten zu entwickeln, der trotz starker Verkrustungsgefahr auch bei Temperaturen von 200 bis 300 °C sicher betrieben werden kann.&Lgr; The object of the present invention is to develop a tubular reactor, in particular for the operation of bauxites containing buhmite and diaspora, which can be operated safely even at temperatures of 200 to 300 °C despite the high risk of encrustation.
Il Il Il !1ItItII Il Il !•till i Il Il IIl Il Il !1ItItII Il Il !•till i Il Il I
I It Il Il ti I Il I •I ·· It It I Il IlI It Il Il ti I Il I •I ·· It It I Il Il
Die Aufgabe wird erfindungsgemäß durch *die in den Schutzansprüchen angegebenen Merkmale gelöst. Dazu besteht der Rohrreaktor in der Verweilzeitstrecke aus einem Mantelrohr 1 mit separat geführtem Innenrohr 2, wobei die beiden Rohre an einem Rohrende fest und am anderen Rohrende beweglich miteinander verbunden sind.The object is achieved according to the invention by the features specified in the claims. For this purpose, the tube reactor in the residence time section consists of a jacket tube 1 with a separately guided inner tube 2, the two tubes being firmly connected to one another at one end and movably connected to one another at the other end.
Der Rohrreaktor kann insbesondere für den Hochtemperaturaufschluß böhmit- und diasporhaltiger Bauxite aber prinzipiell für den nassen, sauren, alkalischen oder neutralen Aufschluß von Mineralien oder Erzen verwendet werden, die in den entsprechenden Reagenzien lösliche Bestandteile aufweisen.The tubular reactor can be used in particular for the high-temperature digestion of bauxites containing boehmite and diaspora, but in principle for the wet, acidic, alkaline or neutral digestion of minerals or ores that contain components that are soluble in the corresponding reagents.
Im folgenden wird die Erfindung anhand eines Ausführungsbeispieles näher erläutert. Ein Teil des Rohrreaktors ist in &Ggr; Fig. 1 im Längsschnitt im Bereich dsr Verweilzeitstrecke dargestellt. In Fig. 2 ist ein Ausschnitt des in Fließrichtung unteren Endes eines Rohrabschnittes in der Verweilzelt-streeke gezeigt.The invention is explained in more detail below using an example. A part of the tube reactor is shown in Fig. 1 in longitudinal section in the region of the residence time zone. Fig. 2 shows a section of the lower end of a tube section in the residence time zone in the direction of flow.
Ein zur Verkrustung neigender Rohrabschnitt A ist zwischen den Anschlußstücken B und C durch Flanschen 6, 7 begrenzt. Er besteht aus einem Mantelrohr 1 mit separat geführtem Innenrohr 2, wobei die bewegliche Verbindung aus einem Kompensator 3 besteht, der zum Anschluß B hin flachenbucjig abschließt. Am anderen Ende sind Mantelrohr 1 und Innenrohr 2 in einem V-Flansch verschweißt. A pipe section A that is prone to encrustation is delimited between the connecting pieces B and C by flanges 6, 7. It consists of a jacket pipe 1 with a separately guided inner pipe 2, where the movable connection consists of a compensator 3 that ends in a flat flange towards the connection B. At the other end, the jacket pipe 1 and inner pipe 2 are welded in a V-flange.
Bei einer Betriebswartung kann der Rohrabschnitt A in kurzer Zeit von den Flanschen S, 7 getrennt werden und durch einen neuen Rohrabschnitt ersetzt werden. Beim alten Rohrabschnitt wird das Innenrohr 2 aus dem Mantelrohr 1 herausgelöst und durch ein neut/s ersetzt. Auf dies« Weise läßt sich die Verkrustung leicht und schnell aus dem Rohrabschnitt A entfernen.During operational maintenance, the pipe section A can be separated from the flanges S, 7 in a short time and replaced by a new pipe section. In the old pipe section, the inner pipe 2 is removed from the jacket pipe 1 and replaced by a new one. In this way, the encrustation can be easily and quickly removed from the pipe section A.
* * ««ff f · I f · f * * ««ff f · I f · f
I«I«
.; . · i * I H i
In rig. 2 let dae Manteitohr' 1 'mit Aim*innonrohr 2 über einen
KompeniÄtor 3 verbunden. Der Kompemator 3 beetttht au· einem <?«-
wellten iiijihr, deaien Wellenhöhe H 20 bii 25 nun beträgt und deeeen
fiineohnürunfl d IS mm In dae Innere dee Innenrohre· 2 hineinragt.
Die Boden de· Rompeniator· 3 eind mit j«weil· einer
eohweiJtaftht 8, 9 mit dem Mantelrohr 1 bzw. dem Innenrohr 2 verbunden.
.; . · i * IH i
In rig. 2 the jacket tube 1 is connected to the inner tube 2 via a compensator 3. The compensator 3 is made of a <?? corrugated sheet, the corrugation height H of which is 20 to 25 mm and the thin section d 15 mm projects into the interior of the inner tubes 2. The bottoms of the compensator 3 are each connected to the jacket tube 1 and the inner tube 2 with a weld 8, 9 .
Gemäß der vorliegenden Erfindung ist das Innenrohr als Krusten- · träger ausgebildet. Der Kompensator soll den Längenausgleich <i zwischen Innenrohr 2 und Mantelrohr 1 auch bei hohen Temperatu- \ ren gewährleisten. Um die Punktion des Kompensators 3 über einen möglichst langen Zeitraum aufrecht zu erhalten/ muß das Krustenwachstum im Bereich des Kompensators 3 zurückgedrängt werden. Dies geschieht vorteilhafterweise durch die besondere Ausbildung &igr; des KompensatorS/ der in das Rohrinnere um einen bestimmten Be- h trag hineinragt und dadurch für eine verringerte Krustenbildung ^ in diesem Bereich sorgt. Die Einhaltung der erfindungsgemäßen t Merkmale in der Bemessung des Kompensators garantiert eine optimale Betriebsweise des Rohrreaktors.According to the present invention, the inner tube is designed as a crust carrier. The compensator is intended to ensure length compensation between the inner tube 2 and the jacket tube 1 even at high temperatures . In order to maintain the puncture of the compensator 3 over as long a period as possible, the crust growth in the area of the compensator 3 must be suppressed. This is advantageously achieved by the special design of the compensator, which projects into the interior of the tube by a certain amount and thereby ensures reduced crust formation in this area. Compliance with the features according to the invention in the dimensioning of the compensator guarantees optimal operation of the tubular reactor.
Claims (7)
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8803700U DE8803700U1 (en) | 1988-03-18 | 1988-03-18 | Tubular reactor, especially for the high-temperature digestion of boehmite- and diaspora-containing bauxites |
GR880100420A GR880100420A (en) | 1988-03-18 | 1988-06-27 | Piping reactor used espeially for the bauxite decomposition in high temperatures containing bohemite and diaspor |
RO13425388A RO104156B1 (en) | 1988-03-18 | 1988-06-29 | Tubular reactor for decomposing at high temperatures of bauxite and other ores |
HU338788A HU199709B (en) | 1988-03-18 | 1988-06-30 | Tube reactor particularly for developing bauxites of boehmite and diaspore content carried out at high temperature |
NL8801660A NL8801660A (en) | 1988-03-18 | 1988-06-30 | TUBE REACTOR, ESPECIALLY FOR HIGH TEMPERATURE DISCLOSURE, OF BAEHMIT AND DIASPRAY CONTAINING BAUXITE SPECIES CONTAINING A ACCESSORY PART, A STAY AND COOLING PROCESS. |
PL27353288A PL273532A1 (en) | 1988-03-18 | 1988-07-05 | Tubular reactor in particular for high-temperature roasting of bemit and diaspor containing bauxite |
IT5328588U IT215002Z2 (en) | 1988-03-18 | 1988-07-08 | TUBULAR REACTOR PARTICULARLY FOR THE HIGH TEMPERATURE DECOMPOSITION OF BAUXITE CONTAINING BOEMITE AND DIASPORO |
AU18973/88A AU606431B2 (en) | 1988-03-18 | 1988-07-12 | Tubular reactor, in particular for high temperature decomposition of bauxites containing boehmite and diaspore |
JP9152088U JPH01139829U (en) | 1988-03-18 | 1988-07-12 | |
SU884356112A SU1708143A3 (en) | 1988-03-18 | 1988-07-14 | Tubular reactor |
FR8809646A FR2628755B3 (en) | 1988-03-18 | 1988-07-15 | TUBULAR REACTOR, ESPECIALLY FOR THE DECOMPOSITION OF BAUXITE |
GB8821233A GB2215714A (en) | 1988-03-18 | 1988-09-09 | Tubular reactor for the high-temperature decomposition of bauxite |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8803700U DE8803700U1 (en) | 1988-03-18 | 1988-03-18 | Tubular reactor, especially for the high-temperature digestion of boehmite- and diaspora-containing bauxites |
Publications (1)
Publication Number | Publication Date |
---|---|
DE8803700U1 true DE8803700U1 (en) | 1989-07-13 |
Family
ID=6822029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8803700U Expired DE8803700U1 (en) | 1988-03-18 | 1988-03-18 | Tubular reactor, especially for the high-temperature digestion of boehmite- and diaspora-containing bauxites |
Country Status (12)
Country | Link |
---|---|
JP (1) | JPH01139829U (en) |
AU (1) | AU606431B2 (en) |
DE (1) | DE8803700U1 (en) |
FR (1) | FR2628755B3 (en) |
GB (1) | GB2215714A (en) |
GR (1) | GR880100420A (en) |
HU (1) | HU199709B (en) |
IT (1) | IT215002Z2 (en) |
NL (1) | NL8801660A (en) |
PL (1) | PL273532A1 (en) |
RO (1) | RO104156B1 (en) |
SU (1) | SU1708143A3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI107961B (en) | 1999-09-23 | 2001-10-31 | Outokumpu Oy | Apparatus for cleaning dusty plants in the melting furnace |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1814796A (en) * | 1930-04-23 | 1931-07-14 | Dow Chemical Co | Autoclave |
GB781994A (en) * | 1954-02-17 | 1957-08-28 | Dorr Oliver Inc | Calcination of alumina hydrate |
US3018170A (en) * | 1959-07-13 | 1962-01-23 | Soloducha Nicolas | Pressure leaching apparatus |
DE1937392C3 (en) * | 1969-07-23 | 1973-09-20 | Vereinigte Aluminium-Werke Ag, 5300 Bonn | Process for the wet digestion of minerals, ores or other substances |
US3744946A (en) * | 1971-10-15 | 1973-07-10 | Nat Standard Co | Apparatus for fabricating continuous elongated components |
GB2127709A (en) * | 1982-10-06 | 1984-04-18 | Univ Edinburgh | Manufacture of aluminium nitride |
DE3602603A1 (en) * | 1986-01-29 | 1987-07-30 | Franz Dr Ing Maly | Self-compensating district-heating pipe with connecting element, designed as steel-jacket composite pipe |
FR2632973B1 (en) * | 1988-06-21 | 1993-01-15 | Michelin & Cie | METHODS AND DEVICES FOR OBTAINING A HOMOGENEOUS AUSTENITY STRUCTURE |
-
1988
- 1988-03-18 DE DE8803700U patent/DE8803700U1/en not_active Expired
- 1988-06-27 GR GR880100420A patent/GR880100420A/en unknown
- 1988-06-29 RO RO13425388A patent/RO104156B1/en unknown
- 1988-06-30 HU HU338788A patent/HU199709B/en not_active IP Right Cessation
- 1988-06-30 NL NL8801660A patent/NL8801660A/en not_active Application Discontinuation
- 1988-07-05 PL PL27353288A patent/PL273532A1/en unknown
- 1988-07-08 IT IT5328588U patent/IT215002Z2/en active
- 1988-07-12 AU AU18973/88A patent/AU606431B2/en not_active Expired - Fee Related
- 1988-07-12 JP JP9152088U patent/JPH01139829U/ja active Pending
- 1988-07-14 SU SU884356112A patent/SU1708143A3/en active
- 1988-07-15 FR FR8809646A patent/FR2628755B3/en not_active Expired - Lifetime
- 1988-09-09 GB GB8821233A patent/GB2215714A/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
AU606431B2 (en) | 1991-02-07 |
AU1897388A (en) | 1989-01-19 |
FR2628755B3 (en) | 1990-03-09 |
HUT49505A (en) | 1989-10-30 |
JPH01139829U (en) | 1989-09-25 |
GB2215714A (en) | 1989-09-27 |
PL273532A1 (en) | 1989-10-02 |
GB8821233D0 (en) | 1988-10-12 |
RO104156B1 (en) | 1993-12-15 |
FR2628755A3 (en) | 1989-09-22 |
HU199709B (en) | 1990-03-28 |
IT8853285V0 (en) | 1988-07-08 |
SU1708143A3 (en) | 1992-01-23 |
IT215002Z2 (en) | 1990-07-30 |
GR880100420A (en) | 1990-01-19 |
NL8801660A (en) | 1989-10-16 |
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