US3923450A - Rotary kiln provided with seal mechanism - Google Patents

Rotary kiln provided with seal mechanism Download PDF

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Publication number
US3923450A
US3923450A US473575A US47357574A US3923450A US 3923450 A US3923450 A US 3923450A US 473575 A US473575 A US 473575A US 47357574 A US47357574 A US 47357574A US 3923450 A US3923450 A US 3923450A
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US
United States
Prior art keywords
rotary kiln
proper
seal mechanism
hood
seal
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 - Lifetime
Application number
US473575A
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English (en)
Inventor
Kimio Inoue
Seiichi Hirano
Tamiharu Sakai
Yasokazu Ikuno
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
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
Priority claimed from JP6439973A external-priority patent/JPS5540785B2/ja
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Application granted granted Critical
Publication of US3923450A publication Critical patent/US3923450A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F27B7/22—Rotary drums; Supports therefor
    • F27B7/24—Seals between rotary and stationary parts

Definitions

  • ABSTRACT A socalled rotary kiln in which a material is continuously heated by means of a rotatably supported cylinder is provided with a seal mechanism for blocking the outer air from the interior of the cylinder, hereinafter referred to as the rotary kiln proper".
  • the seal mechanism for the rotary kiln undergoes various adverse conditions involved inherently in the operation of the rotary kiln, such as vibration in the peripheral portion of the rotary kiln proper during rotation, thermal deformation, thermal elongation and contraction of the rotary kiln proper, continuous operation at high temperatures and the like.
  • improved air-tightness can be maintained stably even under such conditions, principally being achieved by the provision of an elastic member supporting the weight of a hood independently of the rotary kiln proper for preventing a deflected load from being imposed on the seal mechanism, and preferably, a specific seal mechanism especially fit for such an elastic member is employed.
  • the present invention relates generally to rotary kilns in which a material is continuously heated by means of a rotatably supported cylinder, and more particularly to an improved rotary kiln having a seal mechanism for providing a greater degree of air tightness of the cylinder than former kilns possessed.
  • Rotary kilns of the type characterized herein are broadly employed as effective heating kilns for the burning of cement and the calcination of lime and the like. In such rotary kilns, it is generally unnecessary to attain complete interception of the air currents from the'interior of the kiln unless special articles or materials are being heat-treated therein. However, when such rotary kilns are used for the preparation of reduced pellets and in the thermal decomposition treatment of wastes, such as plastic and rubber wastes, it is necessary to completely block the outer air from the interior of the kiln proper by means of a seal mechanism in order to prevent the oxidation of such reduced pellets, the
  • Another object of the present invention is to provide a rotary kiln in which there is no deflected load discontinuously imposed on the seal mechanism of the kiln.
  • Still another object of the present invention is to provide a rotary kiln in which a mechanical seal per se is so disposed that no deflected load is imposed thereon, especially on a packing thereof composed of a nonmetallic material.
  • a further object of the present invention is to provide a rotary kiln in which thermal deformation and thermal elongation and contraction of the rotary kiln proper do not adversely affect the seal mechanism of the device.
  • a rotary kiln which is characterized by a rotary kiln proper, a hood covering the end portion of the rotary kiln proper, a seal mechanism providing a seal between the rotary kiln and the hood, and an elastic member supporting the weight of the hood separately from the weight of the rotary kiln proper.
  • the hood follows the rotary kiln proper during such rotation and it is kept in the state of floating on the rotarykiln proper regardless of the vertical load, so that a deflected load is prevented from being imposed on the seal mechanism.
  • a metal ring is provided in the seal mechanism and the elastic member is disposed so that it can move in the direction parallel with the axial direction of the rotary kiln proper.
  • the intended seal can be at-' tained more effectively.
  • the metal ring improves the ability of the hood to follow after the rotary kiln and protects the non-metallic material of the seal mechanism. Further, the movement of the elas-
  • the elastic member is disposed so that it can move in the direction parallel with the axial direction of the rotary kiln proper.
  • FIG. 1 is a partial side view illustrating one embodiment of a rotary kiln constructed according to the present invention
  • FIG. 2 is a partial side view illustrating another embodiment of a rotary kiln also constructed according to the teachings of the present invention.
  • FIG. 3 is a partial sectional view illustrating an example of a seal mechanism to be used in the rotary kiln of the present invention and contructed according to the teachings thereof.
  • the rotary kiln of the present invention may be either the internal heating type or the external heating type.
  • the invention is illustrated by reference to embodiments concerning an external heating type rotary kiln to be used as an apparatus for thermally decomposing plastic or rubber wastes and for recovering oil or gaseous fuel, or useful materials such as carbides and the like.
  • a rotary kiln proper l is shown being rotatably supported by a roller 21 and a hood 8 is disposed to cover an end portion of the rotary kiln proper. As is illustrated in FIG.
  • a seal mechanism for providing a seal between the rotary kiln proper 1 and the hood 8 is formed from a double-cylinder sleeve 2 fitted integrally by soldering or the like to the end portion of the rotary kiln proper l, aplurality of ring-like packings 3, shown as being four in number, mounted on the periphery of the outer cylinder wall, and a plurality of corresponding metal rings 4, shown as being five in number, being alternately arranged with the packing 3 onthe double-cylinder sleeve 2.
  • ring-like packings 3 and the metal rings 4 are secured within a ring member 5 fitted to the hood 8 by means of a clamping member 6 and a securing bolt 7 for adjusting the force of the binding packings 3.
  • a projection 9 and a control metal fitting 10 are mounted between the hood 8 and the sleeve 2, respectively, so that the hood 8, the ring member 5, the metal rings 4 and the packings 3 can move along with any axial movement of the rotary kiln proper l which may be caused by the thermal expansion thereof.
  • a grease nipple 12 is mounted on the ring member 5 and a lubricant, such as a heat-resistant grease, is fed therethrough on the sliding surface between the packings 3 and the metal rings 4 and the sleeve 2.
  • the hood.8 is shown being supported independently from the rotary kiln proper 1 through an elastic or resilient member composed of a plurality of springs 22, a plurality of position-adjusting members 23 disposed in series with the elastic member and a moving truck 24 carrying the springs 22 and the position-adjusting members 23.
  • the hood 8 is supported through a spring 25, apposition-adjusting member 26 and a chain 27, and the hood 8 is likewise supported independently from the rotary kiln proper 1.
  • the position-adjusting members may take the form of threaded bolts projecting through a plate and having nuts threadably secured on one side of the plate for varying the projection of the bolts through the plate, whereby the vertical disposition of the hood may be adjusted readily.
  • the hood 8 follows the rotary kiln proper 1 without causing any deflected load on the sliding surface, and a good seal can thereby be attained stably for a long period of time.
  • the metal rings 4 can be provided in the seal mechanism. By provision of these metal rings 4, it is possible to prevent the deflected wearing of the packings 3.
  • the hood 8 can easily follow the rotary kiln proper l with a very small force and the force for supporting the structural members, such as the rotary kiln proper l, the hood 8 and the like, is not transmitted through the sliding surface to the seal mechanism.
  • the above-mentioned metal rings 4 are employed, even the small force indicated herein is not imposed on the packings 3 in a deflected manner, and the sliding face or surface of the seal mechanism can be maintained in good condition.
  • the hood 8 is so disposed that it can move in the direction parallel to the axis of the rotary kiln proper 1', it is not at all influenced by thermal elongation or contraction of the rotary kiln proper l. Namely, a good seal can therefore be attained stably without changing the relative positions of the sleeve 2 and the seal mechanism.
  • a rotary kiln provided with a seal mechanism comprising:
  • a seal mechanism providing a seal between said rotary kilnproper and said hood which has metal rings, packings, and means for lubricating the sliding faces of said metal rings and packings;
  • a position-adjusting means connected to said elastic means for vertically adjusting the hood supported thereby.
  • a moving truck supporting said elastic means for moving said elastic means in a direction parallel to the axial direction of said rotary kiln proper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)
  • Sealing Devices (AREA)
US473575A 1973-06-09 1974-05-28 Rotary kiln provided with seal mechanism Expired - Lifetime US3923450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6439973A JPS5540785B2 (enExample) 1972-06-12 1973-06-09

Publications (1)

Publication Number Publication Date
US3923450A true US3923450A (en) 1975-12-02

Family

ID=13257187

Family Applications (1)

Application Number Title Priority Date Filing Date
US473575A Expired - Lifetime US3923450A (en) 1973-06-09 1974-05-28 Rotary kiln provided with seal mechanism

Country Status (3)

Country Link
US (1) US3923450A (enExample)
FR (1) FR2231928B1 (enExample)
GB (1) GB1466143A (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4087334A (en) * 1976-10-04 1978-05-02 Dravo Corporation Seal arrangement for a rotary drum assembly
US4193756A (en) * 1978-03-08 1980-03-18 Tosco Corporation Seal assembly and method for providing a seal in a rotary kiln
US4406464A (en) * 1982-07-17 1983-09-27 Metallgesellschaft Aktiengesellschaft Face seal arrangement for sealing a rotatable tubular member
EP0233448A3 (en) * 1986-02-14 1989-03-15 Hazemag Dr. E. Andreas Gmbh & Co. Rotary drum
US20050073905A1 (en) * 2003-10-03 2005-04-07 Montgomery Raymond E. Renewable drum mixer
US20120288811A1 (en) * 2009-12-11 2012-11-15 Eesti Energia Õlitööstus As Rotary kiln end sealing assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3346338A1 (de) * 1983-12-22 1985-07-11 Pka Pyrolyse Kraftanlagen Gmbh, 7080 Aalen Rotierende schweltrommel zum verschwelen von abfallstoffen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1550591A (en) * 1922-03-21 1925-08-18 Edward G Stone Rotary kiln
US1606124A (en) * 1919-07-09 1926-11-09 Granular Iron Company Rotary-kiln apparatus
US3408083A (en) * 1966-09-02 1968-10-29 Air Reduction Inflatable seal
US3463468A (en) * 1966-10-20 1969-08-26 Humphrey & Glasgow Ltd Suspension means

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1606124A (en) * 1919-07-09 1926-11-09 Granular Iron Company Rotary-kiln apparatus
US1550591A (en) * 1922-03-21 1925-08-18 Edward G Stone Rotary kiln
US3408083A (en) * 1966-09-02 1968-10-29 Air Reduction Inflatable seal
US3463468A (en) * 1966-10-20 1969-08-26 Humphrey & Glasgow Ltd Suspension means

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4087334A (en) * 1976-10-04 1978-05-02 Dravo Corporation Seal arrangement for a rotary drum assembly
US4193756A (en) * 1978-03-08 1980-03-18 Tosco Corporation Seal assembly and method for providing a seal in a rotary kiln
US4406464A (en) * 1982-07-17 1983-09-27 Metallgesellschaft Aktiengesellschaft Face seal arrangement for sealing a rotatable tubular member
EP0233448A3 (en) * 1986-02-14 1989-03-15 Hazemag Dr. E. Andreas Gmbh & Co. Rotary drum
US20050073905A1 (en) * 2003-10-03 2005-04-07 Montgomery Raymond E. Renewable drum mixer
US20060083104A1 (en) * 2003-10-03 2006-04-20 Montgomery Raymond E Renewable drum mixer
US20120288811A1 (en) * 2009-12-11 2012-11-15 Eesti Energia Õlitööstus As Rotary kiln end sealing assembly
US9127772B2 (en) * 2009-12-11 2015-09-08 Eesti Energia Olitoostus As Rotary kiln end sealing assembly

Also Published As

Publication number Publication date
DE2424868A1 (de) 1974-12-12
DE2424868B2 (de) 1976-10-07
FR2231928B1 (enExample) 1976-10-15
FR2231928A1 (enExample) 1974-12-27
GB1466143A (en) 1977-03-02

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