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EP0468350A1 - Dispositif pour racler des tambours rotatifs à haute température - Google Patents

Dispositif pour racler des tambours rotatifs à haute température Download PDF

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Publication number
EP0468350A1
EP0468350A1 EP91111912A EP91111912A EP0468350A1 EP 0468350 A1 EP0468350 A1 EP 0468350A1 EP 91111912 A EP91111912 A EP 91111912A EP 91111912 A EP91111912 A EP 91111912A EP 0468350 A1 EP0468350 A1 EP 0468350A1
Authority
EP
European Patent Office
Prior art keywords
scraping device
tube
scrapers
pipe
rotary
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.)
Withdrawn
Application number
EP91111912A
Other languages
German (de)
English (en)
Inventor
Werner Dr. Schultze
Stefan Dr. Schindler
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.)
Vaw Aluminium AG
Original Assignee
Vereinigte Aluminium Werke AG
Vaw Aluminium 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.)
Filing date
Publication date
Application filed by Vereinigte Aluminium Werke AG, Vaw Aluminium AG filed Critical Vereinigte Aluminium Werke AG
Publication of EP0468350A1 publication Critical patent/EP0468350A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/2075—Removing incrustations

Definitions

  • the invention relates to a scraping device for high-temperature rotary tubes, in particular made of ceramic.
  • fine-grained material in particular tends to cake on the tube wall, which can lead to total blockage of the tube cross-section.
  • caking results in poor heat transfer from the heater to the material or powder to be treated, so that it is not heated or heated uniformly.
  • Scraper systems for metallic rotary tubes consisting essentially of specially shaped stones or metal screws, which can be connected in one piece or in several parts via joints and are moved mechanically. Furthermore, strips are known which can be triangular, flat or square. Such mechanically operating or moving systems are not suitable for ceramic rotary tubes, since uncontrollable movements or impacts in rotating operation can lead to destruction or irreparable damage to the ceramic rotary tube; the same applies to manually moved scraping systems.
  • the object is achieved according to the invention in that the scraping device is arranged statically and axially parallel in the rotary tube and consists of ceramic material.
  • the scraping device particularly advantageously consists of aluminum oxide, spinels, in particular magnesium aluminate, mullite or stabilized zirconium oxide.
  • one or more scrapers are mounted in a receiving tube with a support tube, the cavity between the receiving tube and the support tube being filled with hollow spherical corundum or with a flowable, high-temperature-resistant, ceramic mass for stabilization.
  • This configuration or embodiment is particularly simple, reliable and inexpensive.
  • the scraper device (1) is arranged, for example on the discharge side of a rotary tube (2) statically or stationary and axially parallel in the rotary tube (2).
  • any starting material or product (3) is thermally, possibly also chemically treated in a known manner and conveyed in the direction of the arrow (4) due to a slight longitudinal inclination of the rotary tube according to FIG. 1.
  • materials or products to be treated are strontium carbonate or the carbonates in general. Caking and ring formation in these products generally arise through dissociation / condensation processes.
  • the scraper system (1) is always attached in the upper area of the tube (2) and, with great advantage, is adjustable in height or gap to the inner wall of the rotary tube (2).
  • the gap width (5) is set as a function of the grain size of the powder (3) to be pushed through, and in such a way that the set gap (5) enables the build-up of a specific layer of the powder or product (3) to be pushed through. Contamination of the material (3) to be enforced due to abrasion from the scraping system (1) and rotary tube (2) is thus avoided during the treatment time.
  • the scraping device (1) essentially consists of one or more scrapers (10).
  • a scraper (10) can be designed as a bar (11) in a length of, for example, approximately 100 mm with a support foot (12).
  • the scraper (10) or its supporting foot (12) is arranged in a receiving tube (13) in the illustrated embodiment.
  • the receiving tube (13) has one or more, in the longitudinal direction extending recesses or slots (14) - as shown in particular in Figure 3 - through which Protruding strips (11) of the scrapers (10).
  • the foot (12) of a scraper (10) remaining in the receiving tube (13) is supported on the tube (15) and is advantageously adapted in shape to the curvatures of the tubes (13, 15).
  • the end of the bar (11) which is in operative connection with the rotary tube (2) is advantageously flattened in order to reduce the risk of breakage.
  • connection of the individual parts of the scraper system (1) can deviate from the connection form shown in the drawing figures as any positive connection, for example as a dovetail connection or as a spigot connection.
  • the scrapers (10) or their strips (11) can also be arranged in an offset and / or offset manner according to FIGS. 4 and 5.
  • the set or angularly offset arrangement of the scraper bars (11 ', 11 ", 11"') can be, for example, 60 degrees.
  • the scraper device (1) is preferably only installed where there is a ring formation in the tube (2) or caking occurs, i.e. mostly at the discharge end of the rotary tube (2).
  • the scraping device (1) can e.g. can also be installed over the entire length of the tube (2), i.e. also act in the area on the entry side.
  • the support tube (15) can be flowed through by a cooling medium, which also prevents deflection due to uneven thermal loading.
  • the cooling can take place, for example, with air or inert gases.
  • this is manufactured integrally or composed of tube segments (not shown) which are connected to one another by ceramic sleeves.
  • the scrapers (10) can have any shape, in particular the support foot (12) can also be shaped in any way, the arrangement of the scrapers (10) and their storage or Support in any way.
  • the respective structural design is free to the person skilled in the art in adaptation to the later use of the device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Cleaning In General (AREA)
EP91111912A 1990-07-25 1991-07-17 Dispositif pour racler des tambours rotatifs à haute température Withdrawn EP0468350A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4023589 1990-07-25
DE19904023589 DE4023589C2 (de) 1990-07-25 1990-07-25 Abkratzvorrichtung für Hochtemperatur-Drehrohre

Publications (1)

Publication Number Publication Date
EP0468350A1 true EP0468350A1 (fr) 1992-01-29

Family

ID=6410971

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111912A Withdrawn EP0468350A1 (fr) 1990-07-25 1991-07-17 Dispositif pour racler des tambours rotatifs à haute température

Country Status (2)

Country Link
EP (1) EP0468350A1 (fr)
DE (1) DE4023589C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116140304A (zh) * 2023-04-20 2023-05-23 中建材(合肥)钢构科技有限公司 一种钢管端部内壁清理装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29704044U1 (de) * 1997-03-06 1998-07-09 VEBA OEL Technologie und Automatisierung GmbH, 45879 Gelsenkirchen Walzkörper für eine Drehtrommel sowie einen Walzkörper aufweisende Drehtrommel
CN109282602B (zh) * 2018-09-18 2020-04-10 青岛市中心医院 药剂加工用的双锥回转真空干燥设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR469229A (fr) * 1914-03-04 1914-07-27 Heinrich Staehler Dispositif pour éviter ou enlever les dépots dans les fours d'agglomération
FR497729A (fr) * 1917-02-28 1919-12-16 Mikael Vogel Jorgensen Dispositif pour éliminer les dépots annulaires dans les fours tubulaires rotatifs
US3298679A (en) * 1964-04-29 1967-01-17 Harbison Walker Refractories Rotary kiln scraper
FR2344799A1 (fr) * 1976-03-18 1977-10-14 Kubota Ltd Appareil pour enlever de la paroi d'un four rotatif les depots de matieres solides

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE579483C (de) * 1929-10-17 1933-06-30 Thomas Malcolm Davidson Drehrohrofen fuer die Behandlung von OElschiefer und anderen festen kohlenstoffhaltigen Stoffen
GB1577143A (en) * 1976-04-09 1980-10-22 Kobe Steel Ltd Scraper apparatus for cleaning rotary kilns
US4185352A (en) * 1978-02-10 1980-01-29 Chemetron Corporation Scraped-surface apparatus
US4508577A (en) * 1983-04-29 1985-04-02 Tracor Hydronautics, Inc. Fluid jet apparatus and method for cleaning tubular components
DE3335467A1 (de) * 1983-09-30 1985-04-25 Woma-Apparatebau Wolfgang Maasberg & Co Gmbh, 4100 Duisburg Vorrichtung zum entzundern, reinigen od. dgl. von bohrungen, rohren od. dgl.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR469229A (fr) * 1914-03-04 1914-07-27 Heinrich Staehler Dispositif pour éviter ou enlever les dépots dans les fours d'agglomération
FR497729A (fr) * 1917-02-28 1919-12-16 Mikael Vogel Jorgensen Dispositif pour éliminer les dépots annulaires dans les fours tubulaires rotatifs
US3298679A (en) * 1964-04-29 1967-01-17 Harbison Walker Refractories Rotary kiln scraper
FR2344799A1 (fr) * 1976-03-18 1977-10-14 Kubota Ltd Appareil pour enlever de la paroi d'un four rotatif les depots de matieres solides

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116140304A (zh) * 2023-04-20 2023-05-23 中建材(合肥)钢构科技有限公司 一种钢管端部内壁清理装置
CN116140304B (zh) * 2023-04-20 2023-06-23 中建材(合肥)钢构科技有限公司 一种钢管端部内壁清理装置

Also Published As

Publication number Publication date
DE4023589C2 (de) 1994-07-14
DE4023589A1 (de) 1992-02-06

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Effective date: 19920730