DE1604807B1 - Externally heated rotating drum - Google Patents
Externally heated rotating drumInfo
- Publication number
- DE1604807B1 DE1604807B1 DE19641604807D DE1604807DA DE1604807B1 DE 1604807 B1 DE1604807 B1 DE 1604807B1 DE 19641604807 D DE19641604807 D DE 19641604807D DE 1604807D A DE1604807D A DE 1604807DA DE 1604807 B1 DE1604807 B1 DE 1604807B1
- Authority
- DE
- Germany
- Prior art keywords
- rotary drum
- gas
- rotating drum
- drum
- gas ejector
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
- F26B11/0445—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having conductive heating arrangements, e.g. heated drum wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/028—Arrangements for the supply or exhaust of gaseous drying medium for direct heat transfer, e.g. perforated tubes, annular passages, burner arrangements, dust separation, combined direct and indirect heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Description
Die Erfindung bezieht sich auf eine von außen beheizte Drehtrommel, wie sie üblicherweise zum kontinuierlichen Trocknen oder Brennen der verschiedenartigsten Stoffe, z. B. von Zement, Eisenschwamm od. dgl. benutzt wird.The invention relates to an externally heated rotating drum, as they are usually used for the continuous drying or firing of the most diverse Substances, e.g. B. of cement, sponge iron. Like. Is used.
Die Beheizung der Drehtrommel erfolgt bei den bekannten Drehrohröfen meist mittels eines an der Trommelstirnseite angebrachten Öl- oder Gasbrenners. Die Brennerflamme bzw. die heißen Abgase bestreichen das in der Drehtrommel umgewälzte Gut und geben die Wärme vorwiegend konvektiv ab. Eine derartige Beheizung hat die verschiedensten Nachteile. Um die Wärme gut ausnutzen zu können, muß die Drehtrommel verhältnismäßig lang ausgebildet sein. Es ist nicht möglich, Stoffe zu behandeln, die mit den Abgasen unerwünschte Reaktionen eingehen. Außerdem läßt sich die Temperatur längs der Drehtrommel nur in engen Grenzen variieren. Auch tritt durch die hohe Geschwindigkeit der Brenngase eine erhöhte Staubentwicklung ein.The rotary drum is heated in the known rotary kilns mostly by means of an oil or gas burner attached to the front of the drum. The burner flame or the hot exhaust gases brush the circulated in the rotating drum Good and give off the heat mainly by convection. Such heating has the various disadvantages. In order to be able to make good use of the heat, the rotary drum must be made relatively long. It is not possible to treat substances enter into undesirable reactions with the exhaust gases. In addition, the temperature vary along the rotating drum only within narrow limits. Also occurs through the high Speed of the combustion gases increases the development of dust.
Zum Trocknen von Arzneimitteln ist es bekannt, eine Drehtrommel von außen mit Infrarot-Lampen zu beheizen. In diesemFall kommt das zu trocknende Gut -nicht mehr mit den Abgasen eines Brenners in Verbindung. Da jedoch die Erwärmung durch einzelne Lampen vorgenommen wird, ist keine gleichmäßige Beheizung auf dem ganzen Trommelumfang vorhanden. Zum anderen läßt sich eine solche Beheizung nur bei kleinen Aggregaten und nicht bei großtechnischen Anlagen für metallurgische Zwecke einsetzen.For drying drugs, it is known to use a rotating drum from heated outside with infrared lamps. In this case, the goods to be dried come - no longer in connection with the exhaust gases of a burner. However, since the warming is done by individual lamps, there is no uniform heating on the entire drum circumference available. On the other hand, such a heating can only be with small aggregates and not with large-scale metallurgical plants Use purposes.
Es sind bereits Gasstrahler bekannt, die zur Beheizung von größeren Flächen eingesetzt werden. Mit solchen Strahlem wird eine gleichmäßige Erwärmung des zu behandelnden Gutes erreicht. Eine Anwendung erfolgte aber nur bei Geräten mit sehr geringer Heizleistung, und zwar in erster Linie bei Haushalts- und Küchengeräten.There are already known gas emitters for heating larger Surfaces are used. With such rays a uniform heating is achieved of the item to be treated is reached. However, it was only used for devices with very low heating power, primarily for household and kitchen appliances.
Zur Vermeidung der bei der seither üblichen Beheizung von Drehrohröfen auftretenden Nachteile wird nun erfindungsgemäß vorgeschlagen, daß die Beheizung der Drehtrommel durch einen die Drehtrommel mit Abstand umgebenden und am Austragsende angeordneten nach dem Prinzip der Oberflächenverbrennung arbeitenden zylindrischen Gasstrahler erfolgt, dem eine die Drehtrommel umgebende und sich zum Zugabeende hin erstreckende Abgaskammer nachgeschaltet ist, wobei der Gasstrahler und die Abgaskammer feststehend angeordnet sind. Der zylindrische Gasstrahler umgibt dabei die Drehtrommel vorzugsweise konzentrisch. Die Zuführung des Gas-Luft-Gemisches zum Gasstrahler erfolgt tangential.To avoid the heating of rotary kilns that has been common since then Occurring disadvantages is now proposed according to the invention that the heating the rotary drum by one surrounding the rotary drum at a distance and at the discharge end arranged on the principle of surface combustion working cylindrical Gas ejector takes place, the one surrounding the rotating drum and towards the end of the feed is connected downstream extending exhaust gas chamber, the gas ejector and the exhaust gas chamber are fixedly arranged. The cylindrical gas jet surrounds the rotating drum preferably concentric. The supply of the gas-air mixture to the gas ejector takes place tangentially.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung schematisch dargestellt: Es zeigt F i g. 1 einen Querschnitt einer von außen beheizten Drehtrommel, F i g. 2 einen dazugehörigen Längsschnitt.An exemplary embodiment of the invention is shown schematically in the drawing shown: It shows F i g. 1 shows a cross section of an externally heated rotating drum, F i g. 2 an associated longitudinal section.
Die über den Motor 1 und die Zahnkränze 2 und 3 angetriebene Drehtrommel 4 wird über die angedeutete Zugabevorrichtung 5 mit dem zu behandelnden Gut 6 beschickt. Konzentrisch um die sich in Pfeilrichtung drehende Trommel 4 ist mit Abstand der aus porösem und feuerbeständigem Material bestehende und als Oberflächenbrenner wirkende Gasstrahler 7 angeordnet. über die äußere, vom Mantel 8 gebildete Ringkammer 9 wird ein brennbares Gas-Luft-Gemisch zugeführt, das den Gasstrahler 7 durchströmt und nach der Zündung desselben flammenlos verbrennt, wobei die der Drehtrommel 4 zugewandte Oberfläche zum Glühen kommt. Die Verbrennungswärme wird auf diese Weise vorwiegend als Strahlung an die Drehtrommel 4 abgegeben. Die heißen Abgase gelangen über den Ringraum 10 und die anschließende vom Zylinder 11 gebildete Abgaskammer 12 zum Abzug 13. Dabei geben sie den größten Teil ihrer Wärme an die Drehtrommel 4 zum Vorwärmen des Gutes ab.The rotating drum driven by the motor 1 and the ring gears 2 and 3 4 is charged with the item 6 to be treated via the indicated adding device 5. Concentrically around the drum 4 rotating in the direction of the arrow is at a distance Made of porous and fire-resistant material and used as a surface burner acting gas ejector 7 arranged. via the outer annular chamber formed by the jacket 8 9, a combustible gas-air mixture is supplied, which flows through the gas ejector 7 and after the ignition of the same burns flamelessly, the rotating drum 4 facing surface comes to glow. The heat of combustion is this way emitted primarily as radiation to the rotary drum 4. The hot exhaust gases arrive via the annular space 10 and the subsequent exhaust gas chamber formed by the cylinder 11 12 for deduction 13. They give most of their heat to the rotating drum 4 to preheat the goods.
Der Gasstrahler 7 kann aus einzelnen porösen Steinen bestehen, die in einen mit zahlreichen Bohrungen versehenen Stahlmantel 14 eingemauert sind. Um Strömungsverluste möglichst zu vermeiden und eine gleichmäßige Beaufschlagung des Gasstrahlers 7 zu erreichen, wird das Gas-Luft-Gemisch der Ringkammer 9 zweckmäßig über tangentiale Zufuhrleitungen 15 zugeleitet.The gas ejector 7 can consist of individual porous stones that are walled in a steel jacket 14 provided with numerous holes. Around Avoid flow losses as much as possible and ensure that the To achieve gas ejector 7, the gas-air mixture of the annular chamber 9 is useful supplied via tangential supply lines 15.
Die Beheizung der Drehtrommel 4 kann auch entweder nur oder zusätzlich mit einem im Innern der Drehtrommel angeordneten Gasstrahler 16 erfolgen. Der Einfachheit halber ist er in den F i g. 1 und 2 mit eingezeichnet, obwohl er nicht unbedingt mit dem äußeren Gasstrahler 7 kombiniert sein muß. Der Gasstrahler 16 wird dabei zweckmäßigerweise exzentrisch zur Drehtrommel 4, und zwar der vom Zu gabeende 17 zum Austragsende 18 wandernden Gutschicht abgewandt, angeordnet, weil auf diese Weise das Gut 6 am wenigsten behindert wird. Der beim Trocknen entstehende Dampf sowie die durch den Gasstrahler 16 anfallenden Verbrennungsgase werden durch eine nicht dargestellte Öffnung in der Drehtrommel zum Abzug geleitet.The heating of the rotary drum 4 can either only or in addition take place with a arranged in the interior of the rotating drum gas ejector 16. Of simplicity for the sake of this, it is shown in FIG. 1 and 2 are also drawn in, although not necessarily must be combined with the outer gas ejector 7. The gas ejector 16 is thereby expediently eccentric to the rotary drum 4, namely that of the end 17 to be given facing away from the discharge end 18 migrating material layer, arranged because on this Way, the good 6 is least hindered. The steam produced during drying as well as the combustion gases resulting from the gas ejector 16 are through a Not shown opening in the rotary drum passed to the trigger.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB0076028 | 1964-03-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1604807B1 true DE1604807B1 (en) | 1970-04-30 |
Family
ID=6978906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19641604807D Pending DE1604807B1 (en) | 1964-03-21 | 1964-03-21 | Externally heated rotating drum |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1604807B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0002825A1 (en) * | 1977-12-30 | 1979-07-11 | Phillips Petroleum Company | Method and apparatus for drying particulate material |
WO1996036838A1 (en) * | 1995-05-17 | 1996-11-21 | Bio-Depollution S.A. | Process and device for the in-situ processing of mineral substances contaminated with pollutants |
FR2918163A1 (en) * | 2007-06-26 | 2009-01-02 | Leclerc Monique Daniele Ep Hur | Setting, drying or dehydratation machine for treating products e.g. sludge, comprises a cylindrical, conical or cylindrical-conical drum including a heat exchanger at its internal face, a fixed, heat insulated covering, and a fixed wall |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT72165B (en) * | 1915-04-29 | 1916-07-25 | Berlin Anhaltische Maschb Ag | Dryer. |
DE419512C (en) * | 1922-12-23 | 1925-10-05 | Maschf Augsburg Nuernberg Ag | Method for heating drying facilities, the interior of which is connected to circulation spaces in their walls |
DE699663C (en) * | 1936-01-15 | 1940-12-04 | Martin Brinkmann Akt Ges | Process for drying tobacco products |
GB581040A (en) * | 1944-05-15 | 1946-09-30 | Burroughs Wellcome Co | Method and apparatus for drying drugs and like materials |
CH247701A (en) * | 1947-03-21 | 1947-03-31 | Benz Otto | Electrically heated roasting machine for beans and grains toasted. |
DE832727C (en) * | 1949-11-24 | 1955-04-04 | Bayer Ag | Method and device for drying |
FR1095865A (en) * | 1954-01-07 | 1955-06-07 | Heating apparatus using the catalytic oxidation reaction of combustible gases | |
DE941476C (en) * | 1943-03-10 | 1956-04-12 | Polysius Gmbh | Rotary kiln system for heat and cooling treatment of all kinds of goods, in particular cement raw material |
FR1125957A (en) * | 1955-05-05 | 1956-11-12 | Calorgaz | Apparatus for drying products in small parts, such as powdery or granular products |
DE1017572B (en) * | 1956-08-04 | 1957-10-17 | Adolf Pokorny Dr Ing | Hop kiln with suction fan |
DE971329C (en) * | 1942-07-07 | 1959-01-08 | Brockmann & Bundt Ind Ofenbau | Device for heating metal baths, in particular zinc and lead baths |
-
1964
- 1964-03-21 DE DE19641604807D patent/DE1604807B1/en active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT72165B (en) * | 1915-04-29 | 1916-07-25 | Berlin Anhaltische Maschb Ag | Dryer. |
DE419512C (en) * | 1922-12-23 | 1925-10-05 | Maschf Augsburg Nuernberg Ag | Method for heating drying facilities, the interior of which is connected to circulation spaces in their walls |
DE699663C (en) * | 1936-01-15 | 1940-12-04 | Martin Brinkmann Akt Ges | Process for drying tobacco products |
DE971329C (en) * | 1942-07-07 | 1959-01-08 | Brockmann & Bundt Ind Ofenbau | Device for heating metal baths, in particular zinc and lead baths |
DE941476C (en) * | 1943-03-10 | 1956-04-12 | Polysius Gmbh | Rotary kiln system for heat and cooling treatment of all kinds of goods, in particular cement raw material |
GB581040A (en) * | 1944-05-15 | 1946-09-30 | Burroughs Wellcome Co | Method and apparatus for drying drugs and like materials |
CH247701A (en) * | 1947-03-21 | 1947-03-31 | Benz Otto | Electrically heated roasting machine for beans and grains toasted. |
DE832727C (en) * | 1949-11-24 | 1955-04-04 | Bayer Ag | Method and device for drying |
FR1095865A (en) * | 1954-01-07 | 1955-06-07 | Heating apparatus using the catalytic oxidation reaction of combustible gases | |
FR1125957A (en) * | 1955-05-05 | 1956-11-12 | Calorgaz | Apparatus for drying products in small parts, such as powdery or granular products |
DE1017572B (en) * | 1956-08-04 | 1957-10-17 | Adolf Pokorny Dr Ing | Hop kiln with suction fan |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0002825A1 (en) * | 1977-12-30 | 1979-07-11 | Phillips Petroleum Company | Method and apparatus for drying particulate material |
WO1996036838A1 (en) * | 1995-05-17 | 1996-11-21 | Bio-Depollution S.A. | Process and device for the in-situ processing of mineral substances contaminated with pollutants |
FR2734344A1 (en) * | 1995-05-17 | 1996-11-22 | Bio Depollution Sa | METHOD AND DEVICE FOR THE IN SITU TREATMENT OF MINERAL MATERIAL CONTAMINATED BY A POLLUTANT SUBSTANCE |
FR2918163A1 (en) * | 2007-06-26 | 2009-01-02 | Leclerc Monique Daniele Ep Hur | Setting, drying or dehydratation machine for treating products e.g. sludge, comprises a cylindrical, conical or cylindrical-conical drum including a heat exchanger at its internal face, a fixed, heat insulated covering, and a fixed wall |
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