US3794462A - Rotary kilns with uphill cooler tubes - Google Patents

Rotary kilns with uphill cooler tubes Download PDF

Info

Publication number
US3794462A
US3794462A US00273795A US3794462DA US3794462A US 3794462 A US3794462 A US 3794462A US 00273795 A US00273795 A US 00273795A US 3794462D A US3794462D A US 3794462DA US 3794462 A US3794462 A US 3794462A
Authority
US
United States
Prior art keywords
kiln
tubular body
kiln shell
cooler tubes
shell
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
US00273795A
Other languages
English (en)
Inventor
K Sylvest
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.)
FLSmidth and Co AS
Original Assignee
FLSmidth and Co AS
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 FLSmidth and Co AS filed Critical FLSmidth and Co AS
Application granted granted Critical
Publication of US3794462A publication Critical patent/US3794462A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 peculiar to rotary-drum furnaces
    • F27B7/38—Arrangements of cooling devices
    • F27B7/40—Planetary coolers

Definitions

  • ABSTRACT A rotary kiln equipped with specially constructed means for supporting the outlet ends of uphill cooler tubes independently of the kiln shell is disclosed.
  • This suppon means includes a tubular body encircling the kiln shell in spaced apart relationship. The outlet ends of the cooler tubes are connected to this tubular body which itself is independently supported for rotation with the kiln shell.
  • the invention relates to rotary kilns of the type which are provided with up-hill cooler tubes arranged in planetary fashion about the kiln for the cooling of cement clinker or similar product of the kiln.
  • the cooler tubes extend in encircling relationship along the kiln body which is positioned such that it has a slight upward incline in a direction opposite to the direction of the kiln product flow through the kiln body.
  • the kiln product moves slightly downward through the kiln and slightly upward through the cooler tubes.
  • Such kilns are provided with outwardly projecting pipe stubs evenly distributed around the outlet or lower end portion of the kiln.
  • Each pipe stub is-connected in communicating relationship to one end of a cooler tube. The kiln product passes from the kiln through the pipe stubs into the cooler tubes.
  • cooler tubes are provided with transport devices for the kiln product, such as flights or other suitable devices, which are capable of conveying the kiln product upward through the slightly inclined cooler tubes.
  • each cooler tube Both ends of each cooler tube are generally supported by the kiln shell.
  • the outlet ends of the cooler tubes are adjacent to a burning zone and, consequently, the outside temperature of the kiln shell in this area in spite of the inner lining is very high.
  • the kiln shell may be relatively soft in this area and subject to being deformed as a result of the forces to which it is subjected by the supported upper ends of the cooler tubes during the rotation of the kiln.
  • the upper or outlet ends of up-hill cooler tubes are not connected directly to the kiln shell but are advantageously supported independently of the kiln.
  • specially constructed support means is provided.
  • This means includes a tubular body or stay tube disposed in encircling spaced apart relationship to the kiln shell.
  • the outlet ends of the cooler tubes are secured to the stay tube.
  • the stay tube is independently supported on rotatable support means comprising a freely rotatable element or roller.
  • a live ring or tire member is disposed about the stay tube in frictional contact with the freely rotatable element.
  • FIG. 1 is a longitudinal elevation view of a lower end portion of a kiln provided with up-hill cooler tubes partially in section and partially broken away to show one embodiment of the improved support means according to this invention.
  • FIG. 2 is a cross-sectional view taken along the lines 2-2 of FIG. 1.
  • the lowermost end of kiln shell 1 has a plurality of up-hill cooler tubes 2 in planetary fashion about the kiln shell 1.
  • the inlet ends 2(a) of cooler tubes 2 communicate with the interior of kiln shell 1 as shown.
  • the inlet ends of the cooler tubes are fixed by means of clamps 7. to a saddle plate 8, which is mounted on a ring 9 welded to the kiln shell.
  • Adjacent their outlet ends 2(b) the cooler tubes are fixed to a tubular body or stay tube 3 by saddle plate 5.
  • saddle plate Sis welded to the stay tube and is provided with recesses 5(a) for receiving the outlet ends of the cooler tubes.
  • the cooler tubes are held in recesses 5(a) by clamps 6.
  • Stay tube 3 is reinforced by longitudinal ribs 4.
  • a ring shaped plate 12 is welded to the outlet ends of cooler tubes 2 and to the stay tube 3 as shown.
  • This plate 12 is connected in sealed relationship to one side of casing 13 by abutting flanges 12(a) and 13(a) respectively.
  • the other side of casing 13 is also connected in sealed relationship to stay tube 3 by flange 13(b), as shown.
  • the casing 13 acts to direct cooling air into cooler tubes 2 for a purpose well known in the art.
  • the stay tube 3 encircles kiln shell 1 in spaced apart relationship thereto such that the stay tube 3 and kiln shell 1 have a common axis of rotation defined by the axis of kiln shell 1.
  • the stay tube 3 projects axially beyond the cooler tubes ends where it carries a live tire or ring 10 supported by a rotatable means which in the construction shown comprises a freely rotatable element or live roller 11.
  • the ring 10 is live in the sense that it is mounted on stay tube 3 for rotational movement relative to stay tube 3. There is, thus, a slight radial clearance between the live ring 10 and the external surface of stay tube 3. This clearance is advantageous since it allows for expansion of the stay tube arising from overheating during kiln operation. However, it will be recognized that the tilt of the kiln may cause the loose fitting ring 10 to slide or move longitudinally relative to stay tube 10 during rotation.
  • While frictional contact between the ring 10 and stay tube 3 is generally sufficient to prevent such movement live ring 10 may be held firmly against such longitudinal movement by conventional means well known to persons skilled in the art as, for example, by a rail (not shown) fixed to stay tube 3 and positioned in adjacent contacting relation to ring 10 on the down hill side thereof.
  • an energy absorption means For the purpose of absorbing torsional forces developed between stay tube 3 and kiln shell 1 during rotation an energy absorption means is provided.
  • This means includes, in the construction shown, a plurality of spoke-like members 14 interconnecting the kiln shell substantially the entire weight of stay tube 3 is borne by est areas of the shell adjacent the burning zone of the' kiln. Thus the possibility of shell deformation in these areas is substantially eliminated.
  • a rotary kiln having a kiln shell, a plurality of uphill cooler tubes arranged in a planetary fashion about the kiln shell, means for connecting the inlet ends of I each of the cooler tubes in communicating relationship with respect to the outlet end of the kiln, and means for supporting the outlet ends of the cooler tubes relative to the kiln shell, said outlet ends being positioned adjacent to a relatively high temperature burning portion of the kiln shell, the improvement which comprises:
  • a a substantially tubular body disposed in substantially coaxial spaced apart relationship to the kiln shell encircling the kiln shell and supporting the outlet ends of the cooler tubes;
  • c. means interconnecting the kiln shell and the substantially tubular body to absorb at least a portion of the torsional forces developed between the tubular body and the kiln shell during rotation thereof.
  • the improvement according to claim 1 further including a live ring member mounted on the external surface of the tubular body and disposed in frictional contacting relation to said last mentioned support means.
  • tubular body has a portion extending axially beyond the outlet ends of the cooler tubes;
  • said live ring member is mounted on said extension portion of the tubular body in contacting relation to said freely rotatable element.
  • tubular body is fixed to the side of cooler tubes facing the kiln shell.
  • the improvement according to claim 1 further including energy absorption means for mounting the tubular body mounting the cooler tubes and the kiln shell relative to each other in substantially torsion free relationship.
  • said energy absorption means comprises at least one spoke-like member connected between the kiln shell and tubular body in tangential relationship with respect to the kiln shell whereby said spoke-like members are subjected to purely tensile forces during rotation of the kiln.
  • a rotary kiln having a shell, a plurality of uphill cooler tubes arranged in planetary fashion about the kiln shell, means for connecting the inlet ends of the cooler tubes in communicating relationship to the outlet end of the kiln, and means for supporting the outlet ends of the cooler tubes relative to the kiln shell, the improvement in combination therewith which comprises:
  • a tubular body disposed in encircling spaced apart relationship to the kiln shell for mounting the outlet ends of thecooler tubes fixed thereto;
  • a freely rotatable element supporting the tubular body independently of the kiln shell at a position spaced from the high temperature burning zone of the kiln along the axis of the body thereby preventing distortion of the kiln shell at said high temperature burning zone;
  • At least one spoke-like member connected between the kiln shell and tubular body in substantially tangential relationship with respect to the kiln shell whereby each spoke-like member is subject to purely tensile forces during rotation of the kiln such that the kiln shell and the tubular bodygire mounted relative to each other in substantially torsion free relationship.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)
US00273795A 1971-08-03 1972-07-21 Rotary kilns with uphill cooler tubes Expired - Lifetime US3794462A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3642871 1971-08-03

Publications (1)

Publication Number Publication Date
US3794462A true US3794462A (en) 1974-02-26

Family

ID=10388055

Family Applications (1)

Application Number Title Priority Date Filing Date
US00273795A Expired - Lifetime US3794462A (en) 1971-08-03 1972-07-21 Rotary kilns with uphill cooler tubes

Country Status (13)

Country Link
US (1) US3794462A (fr)
JP (1) JPS5524035B2 (fr)
AU (1) AU464433B2 (fr)
BE (1) BE787084A (fr)
BR (1) BR7205199D0 (fr)
CA (1) CA981904A (fr)
DE (1) DE2236399C2 (fr)
ES (1) ES405449A1 (fr)
FR (1) FR2149828A5 (fr)
GB (1) GB1352590A (fr)
IT (1) IT963664B (fr)
SE (1) SE383413B (fr)
ZA (1) ZA724614B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005980A (en) * 1974-09-19 1977-02-01 Polysius Ag Satellite tube support
US4008995A (en) * 1975-01-14 1977-02-22 Polysius Ag Rotary kiln construction
US4059397A (en) * 1975-05-02 1977-11-22 Josef Adler Rotary kiln
US4222736A (en) * 1977-12-21 1980-09-16 Gebrueder Buehler Ag Rotary tubular kiln and satellite cooler therefor with improved support means
US4243384A (en) * 1978-04-11 1981-01-06 F. L. Smidth & Company Rotary kiln
US4251927A (en) * 1979-12-17 1981-02-24 Ingersoll-Rand Company Paper drier drum
US5224539A (en) * 1991-06-14 1993-07-06 Coen Company, Inc. Cooling system for air heaters and the like
US6105272A (en) * 1998-06-22 2000-08-22 Cabot Corporation High temperature rotating vacuum kiln for heat treating solid particulate material under a vacuum
US6380517B2 (en) 1999-06-21 2002-04-30 Cabot Corporation High temperature rotating vacuum kiln and method for heat treating solid particulate material under a vacuum

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT324920B (de) * 1973-04-27 1975-09-25 Hatschek Zementwerke Ag H Kühltrommel für einen drehofen
DE2424224B2 (de) * 1974-05-17 1976-03-18 Polysius Ag, 4723 Neubeckum Drehrohrofen mit satellitenkuehler
GB1499540A (en) * 1974-12-13 1978-02-01 Polysius Ag Rotary kiln

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1184174A (en) * 1915-10-20 1916-05-23 Lloyd D Gilbert Rotary kiln.
GB407329A (en) * 1932-09-13 1934-03-13 Smidth & Co As F L Improvements relating to rotary kilns
US2348446A (en) * 1943-08-09 1944-05-09 Allis Chalmers Mfg Co Rotary cooler
US3317202A (en) * 1960-09-14 1967-05-02 Jr Henry J Cates Incinerator
US3502139A (en) * 1967-03-22 1970-03-24 Smidth & Co As F L Planetary coolers for use with rotary kilns

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2001258A (en) * 1932-09-13 1935-05-14 Smidth & Co As F L Rotary kiln and cooler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1184174A (en) * 1915-10-20 1916-05-23 Lloyd D Gilbert Rotary kiln.
GB407329A (en) * 1932-09-13 1934-03-13 Smidth & Co As F L Improvements relating to rotary kilns
US2348446A (en) * 1943-08-09 1944-05-09 Allis Chalmers Mfg Co Rotary cooler
US3317202A (en) * 1960-09-14 1967-05-02 Jr Henry J Cates Incinerator
US3502139A (en) * 1967-03-22 1970-03-24 Smidth & Co As F L Planetary coolers for use with rotary kilns

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005980A (en) * 1974-09-19 1977-02-01 Polysius Ag Satellite tube support
US4008995A (en) * 1975-01-14 1977-02-22 Polysius Ag Rotary kiln construction
US4059397A (en) * 1975-05-02 1977-11-22 Josef Adler Rotary kiln
US4222736A (en) * 1977-12-21 1980-09-16 Gebrueder Buehler Ag Rotary tubular kiln and satellite cooler therefor with improved support means
US4243384A (en) * 1978-04-11 1981-01-06 F. L. Smidth & Company Rotary kiln
US4251927A (en) * 1979-12-17 1981-02-24 Ingersoll-Rand Company Paper drier drum
US5224539A (en) * 1991-06-14 1993-07-06 Coen Company, Inc. Cooling system for air heaters and the like
US6105272A (en) * 1998-06-22 2000-08-22 Cabot Corporation High temperature rotating vacuum kiln for heat treating solid particulate material under a vacuum
US6271501B1 (en) 1998-06-22 2001-08-07 Cabot Corporation High temperature rotating vacuum kiln and method for heat treating solid particulate material under a vacuum
US6380517B2 (en) 1999-06-21 2002-04-30 Cabot Corporation High temperature rotating vacuum kiln and method for heat treating solid particulate material under a vacuum

Also Published As

Publication number Publication date
FR2149828A5 (fr) 1973-03-30
JPS4825719A (fr) 1973-04-04
CA981904A (en) 1976-01-20
DE2236399A1 (de) 1973-02-15
JPS5524035B2 (fr) 1980-06-26
IT963664B (it) 1974-01-21
ZA724614B (en) 1973-04-25
GB1352590A (en) 1974-05-08
DE2236399C2 (de) 1982-05-06
BR7205199D0 (pt) 1973-06-12
BE787084A (fr) 1972-12-01
AU4514472A (en) 1974-02-28
AU464433B2 (en) 1975-08-28
ES405449A1 (es) 1975-09-01
SE383413B (sv) 1976-03-08

Similar Documents

Publication Publication Date Title
US3794462A (en) Rotary kilns with uphill cooler tubes
US4462793A (en) Rotary kiln and method of using such a kiln
US3502139A (en) Planetary coolers for use with rotary kilns
PL178974B1 (pl) Komora grzewcza materialu stalego PL PL PL
US4811961A (en) Seal for rotating cylinders such as kilns and the like
US3384356A (en) Tire fastening for a rotary shell
US3502311A (en) Coolers for rotary kilns
US3792961A (en) Rotary kiln
US3813211A (en) Cooler tubes for rotary kiln
US2889143A (en) Preheater for rotary kiln
US3294384A (en) Rotary kiln with preheater
BG63761B1 (bg) Металургичен пещен агрегат и по-специално въртящ се конвертор с горно продухване
US3372915A (en) Rotary kiln assemblies
US4243382A (en) Material distributing means for rotary drum type heat treatment apparatus
US1399503A (en) Cylindrical kiln and drier
US4021195A (en) Planetary cooler system for rotary drums such as kilns
US3643933A (en) Cooler for rotary kiln
US3477704A (en) Connection apparatus for sections of a rotary furnace
KR19990000262U (ko) 재(ash) 이송용 스크류콘베이어의 냉각장치
US3547418A (en) Rotary kilns with cooler tubes
US2305272A (en) Heat exchange apparatus
US4243384A (en) Rotary kiln
SU792052A2 (ru) Теплообменное устройство вращающейс печи
US3705460A (en) Material cooling apparatus
US1653050A (en) Rotary kiln and cooler