US3775042A - Rotary kiln with a plurality of cooling pipes - Google Patents

Rotary kiln with a plurality of cooling pipes Download PDF

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Publication number
US3775042A
US3775042A US00232685A US3775042DA US3775042A US 3775042 A US3775042 A US 3775042A US 00232685 A US00232685 A US 00232685A US 3775042D A US3775042D A US 3775042DA US 3775042 A US3775042 A US 3775042A
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US
United States
Prior art keywords
funnel
rotary kiln
shaped member
kiln
cooling pipes
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
US00232685A
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English (en)
Inventor
W Triebel
M Durr
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Polysius AG
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Filing date
Publication date
Application filed by Polysius AG filed Critical Polysius AG
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Publication of US3775042A publication Critical patent/US3775042A/en
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    • 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
    • F27B7/38—Arrangements of cooling devices
    • F27B7/40—Planetary coolers

Definitions

  • the present invention relates to a rotary kiln with a plurality of cooling pipes which are arranged around the outlet end of the kin and the axes of which are substantially parallel to the axis of the rotary kiln.
  • the cooling pipes are uniformly distributed over the circumference of the kiln and extend either upwardly from their inlets toward the inlet of the rotary kiln or downwardly away from the inlet end.
  • the hot material such as cement clinker, calcined alumina, or the like, which leaves the rotary kiln subsequently passes through rotary cooling pipes which are slightly inclined similar to the rotary kiln and rotate therewith, if desired with the aid of transporting elements, and conveysits heat to the cooling air which is passed in counter current flow to thehot material through the cooling pipes, and in the rotary kiln serves as secondary combustion air.
  • FIG. 1 shows the outlet end of a rotary kiln with the battery of cooling pipes in top view and partially also in longitudinal section.
  • FIG. 2 is a section taken along the line "-11 of FIG. 1.
  • FIGS. 3 to 8 respectively illustrate various arrangements of cooling pipe batteries, again in top view and partially in longitudinal section.
  • the rotary kiln according to the present invention is characterized primarily in that the outlet end of the rotary kiln has a conically outwardly flaring portion with a closure wall to which the cooling pipes are directly connected without connecting members.
  • the hot material is conveyed to the individual cooling pipes in conformity with its customary movement in the rotary kiln so that the wear is reduced to the degree customary in rotary kiln installations while special wear resistant parts are no longer necessary.
  • the large cross sections of the passages and the favorable guiding of the flow also overcome the above referred to drawbacks of the heretofore known satellite coolers, such as high air speed, high flow resistance, distribution of the dust, and blocking of the passages by too large pieces of the material to be fired.
  • the cylindrical rotary pipe has its outlet end provided with a widened portion 2 which has the shape of a truncated cone.
  • Firmly connected to the closure wall 3 of the truncated cone are six cooling pipes 4 which are arranged around the outlet end of rotary pipe v1 and which by means of two holding members 5 permitting heat expansions are held by a supporting pipe 6 which forms the end of the rotary kiln.
  • the widened portion 2 is through a short cylindrical intermediate member 7 and a further cone 8 through which the cooling pipes 4 extend connected to the supporting pipe 6.
  • the rotary kiln is furthermore provided with two race rings 9 and 10.
  • the closure wall 3 of the truncated cone 2 is likewise designed as truncated cone whereby the material to be fired will be prevented from falling back during the rotation of the cooling pipes 4 in the truncated cone 2.
  • the closure wall 3 is reinforced by means of radial ribs 12 which are arranged between the cooling pipes 4 and which rest against the supporting pipe 6.
  • FIG. 6 shows an arrangement in which the supporting pipe 13 is shortened to such an extent that the cooling pipes 4 are connected thereto only by means of a single holding member 5 while the race ring 10 is eliminated so that the entire load of the outlet end of the rotary kiln with the cooling pipe battery is absorbed by the bearing means (not shown) in which the race ring 9 is journalled.
  • FIGS. 7 and 8 illustrate an arrangement according to which the cooling pipes 4 are arranged around the firing zone of the rotary pipe 1 in such a way that their discharge ends 14 extend in the direction toward the inlet end of the rotary pipe 1.
  • the transport of the cooling medium through the cooling pipes which in this instance slightly ascend in the direction in which the cooling medium passes through the kiln is made possible in a manner known per se by conveying spirals on the inner walls of the cooling pipes.
  • a supporting pipe 6 with an end race ring is provided which latter is eliminated in the embodiment shown in FIG. 8.
  • a rotary kiln construction comprising a rotary kiln with an outlet end portion,which includes: a funnelshaped member connected to said outlet end portion and having its interior via its open end of smaller diameter in communication with the interior of said kiln, said funnel-shaped member having its greater diameter end provided with a bottom wall, and a plurality of cooling pipes having their longitudinal extension approximately in the same direction as said kiln and communicating through said bottom wall with the interior of said funnel-shaped member.
  • a rotary kiln construction comprising a rotary kiln with an outlet end portion, which includes: a funnelshaped member connected to said outlet end portion and having its interior in communication with the interior of said kiln, said funnel-shaped member having its greater diameter end provided with a bottom wall, a plurality of cooling pipes having their longitudinal extension approximately in the same direction as said kiln and communicating through said bottom wall with the interior of said funnel-shaped member, the narrower end of said funnel-shaped member being connected to said rotary kiln, and a conical member connected to the wider end of said funnel-shaped member and also including a substantially cylindrical supporting member substantially axially aligned with said rotary kiln and connected to said conical member, said supporting member forming an extension of said rotary kiln.
  • a rotary kiln construction according to claim 4 which includes race ring means respectively mounted on said rotary kiln near said funnel-shaped member and on said extension.
  • a rotary kiln construction according to claim 4 which includes reinforcing pipe means interconnecting said funnel-shaped member and said conical member.
  • a rotary kiln construction according to claim 4 which includes reinforcing ribs radially extending with regard to and resting upon said supporting member and reinforcing said bottom wall.
  • a rotary kiln construction comprising a rotary kiln with an outlet end portion which includes: a funnel shaped member connected to said outlet end portion and having its interior in communication with the interior of said kiln, said funnel-shaped member having its greater diameter end provided with a bottom wall, and a plurality of cooling pipes having their longitudinal extension approximately in the same direction as said kiln and communicating through said bottom wall with the interior of said funnel-shaped member, the bottom wall of said funnel-shaped member being conical.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
US00232685A 1971-03-10 1972-03-08 Rotary kiln with a plurality of cooling pipes Expired - Lifetime US3775042A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712111403 DE2111403B2 (de) 1971-03-10 1971-03-10 Drehrohrofen mit mehreren kuehlrohren

Publications (1)

Publication Number Publication Date
US3775042A true US3775042A (en) 1973-11-27

Family

ID=5801057

Family Applications (1)

Application Number Title Priority Date Filing Date
US00232685A Expired - Lifetime US3775042A (en) 1971-03-10 1972-03-08 Rotary kiln with a plurality of cooling pipes

Country Status (5)

Country Link
US (1) US3775042A (enrdf_load_stackoverflow)
BR (1) BR7201337D0 (enrdf_load_stackoverflow)
DE (1) DE2111403B2 (enrdf_load_stackoverflow)
FR (1) FR2129520A5 (enrdf_load_stackoverflow)
GB (1) GB1349702A (enrdf_load_stackoverflow)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1008974A (en) * 1910-09-15 1911-11-14 Smidth & Co As F L Rotary kiln.
US2845259A (en) * 1954-10-07 1958-07-29 Smidth & Co As F L Combined kiln and cooler
FR1332702A (fr) * 1962-06-07 1963-07-19 Refroidisseur rotatif
US3358977A (en) * 1965-08-05 1967-12-19 Smidth & Co As F L Rotary kiln installations
US3502139A (en) * 1967-03-22 1970-03-24 Smidth & Co As F L Planetary coolers for use with rotary kilns
US3512764A (en) * 1967-06-20 1970-05-19 Smidth & Co As F L Rotary kiln having planetary cooling tubes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1008974A (en) * 1910-09-15 1911-11-14 Smidth & Co As F L Rotary kiln.
US2845259A (en) * 1954-10-07 1958-07-29 Smidth & Co As F L Combined kiln and cooler
FR1332702A (fr) * 1962-06-07 1963-07-19 Refroidisseur rotatif
US3358977A (en) * 1965-08-05 1967-12-19 Smidth & Co As F L Rotary kiln installations
US3502139A (en) * 1967-03-22 1970-03-24 Smidth & Co As F L Planetary coolers for use with rotary kilns
US3512764A (en) * 1967-06-20 1970-05-19 Smidth & Co As F L Rotary kiln having planetary cooling tubes

Also Published As

Publication number Publication date
DE2111403A1 (enrdf_load_stackoverflow) 1972-09-07
BR7201337D0 (pt) 1973-06-14
GB1349702A (en) 1974-04-10
FR2129520A5 (enrdf_load_stackoverflow) 1972-10-27
DE2111403B2 (de) 1972-09-07

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