US3813211A - Cooler tubes for rotary kiln - Google Patents

Cooler tubes for rotary kiln Download PDF

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Publication number
US3813211A
US3813211A US00288490A US28849072A US3813211A US 3813211 A US3813211 A US 3813211A US 00288490 A US00288490 A US 00288490A US 28849072 A US28849072 A US 28849072A US 3813211 A US3813211 A US 3813211A
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US
United States
Prior art keywords
kiln
cooler
chute
communicating
cooler tube
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
US00288490A
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English (en)
Inventor
H Gommesen
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.)
SMITH S AND CO
Original Assignee
SMITH S AND CO
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 SMITH S AND CO filed Critical SMITH S AND CO
Application granted granted Critical
Publication of US3813211A publication Critical patent/US3813211A/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 peculiar to rotary-drum furnaces
    • F27B7/38—Arrangements of cooling devices
    • F27B7/40—Planetary coolers

Definitions

  • the kiln shell in rotary kilns of the type disclosed herein is generally mounted such that its axis of rotation is inclined upward in the direction opposite to the direction of material movement or flow within the kiln body.
  • the cooler tubes extend alongside the kiln shell and are inclined upward in the direction in which material flows through the cooler tubes (i.e. in a direction opposite to the direction of material flow through the kiln shell.)
  • Such cooler tubes are commonly known as uphill cooler tubes.
  • the cooler tubes extend away from the outlet end of the kiln shell and are inclined downward in the direction in which material flows through the cooler tubes (i.e., in the same direction as material flow through the kiln shell) in which case the cooler tubes extend-away from the outlet end of the kiln shell.
  • the latter cooler tubes are commonly known as down-hill cooler tubes.
  • the cooler tubes may be parallel or inclined at an angle to the axis of the kiln.
  • the cooler tubes contain scoops, chains or other devices by which the material in them is urged towards their outlet ends, particularly with those constructions equipped with up-hill cooler tubes.
  • the part of the cooler tube at its inlet end which is opposite the mouth of the communicating chute is constituted by a part of the cylindrical wall of the tube and the part that'is-nearer the kiln shell is formed as a section of a cylinder the axis of which is so inclined to that of thetube as to provide a surface down which material in the'tube' may slide away from the outlet of the chute when the tube is above the kiln axis.
  • the present invention is specifically concerned with a new and improved construction of the inlet end of a cooler tube to substantially eliminate back-spill even when the charge in each cooler tube is larger than normal.
  • the cooler tube and communicating chute are connected together in substantially tangential relationship and the end wall of each cooler tube adjacent the communicating chute includes a conical surface concave to the interior of the cooler tube with its apex at or near the junction point of the cooler tube and communicating chute.
  • the conical surface is oriented in such a way that it advances incomming material away from the opening in the communicating chute.
  • the conical surface also acts to prevent back-spill of material into the chute.
  • each chute of a kiln constructed according to this invention may be comprised of two or more straight pipes. At least two of these pipes are disposed in angular relationship with respect to each other. Thereby, a knee bend is formed in each chute which advantageously acts to trap backspilling material inadvertently entering the chute upon rotation of the kiln.
  • a rotary kiln 1 having a refractory lining 3 is shown for burning of a charge 2 of raw material (eg cement raw material) to clinker.
  • raw material eg cement raw material
  • the kiln has a number of outlet openings 4 which communicate through chutes 5 with a corresponding number of cooler tubes 6 mounted with their axes substantially parallel to the axis of the kiln and arranged equiangularly around the kiln shell in a planetary fashion.
  • Each cooler tube comprises a cylindrical tube having an outlet 7 in one end of the tube and an inlet opening registering with the corresponding communicating chute 5.
  • the communicating chute 5 is comprised of two or more straight pipes ll, 12 and 13 which are joined together (e.g. by welding). Straight pipes 11 and 12 are connected together in angular relationship to thereby form a knee bend 14 pointing in the direction of rotation of the cooler tube indicated by the arrow in FIGS. 2 and 3.
  • the cooled material discharged from the cooler tubes 6 is collected in a hopper 8 from which it is removed by conventional means well known in the art.
  • each cooler tube is closed by a conical surface 9 concave to the interior of the tube and having its apex 10 at or near the junction point of the communicating chute 5 and the cooler tube.
  • material in the kiln rests substantially on one side of a central plane extending diametrically through the kiln.
  • material is lifted within the kiln shell during rotation of same to form a cushion of material located substantially on one side of such a diametrical plane which is vertically oriented.
  • the material processed in the kiln moves from the inlet end to the outlet end of the kiln shell where it flows into the cooler tubes through the communicating chutes. The material will start to spill over into the communicating chutes as they pass through the lowermost point in their circular path and slide gently through the communicating chute onto the cylindrical surface of the cooler tube.
  • the material slides on the cylindrical surface of the cooler tube and is advanced in a direction away from the inlet end of the cooler tube by the conical surface 9 which acts to push the material forward in the cooler tube.
  • the cushion of material in the cooler tube When the cooler tube has passsed its uppermost position, the cushion of material in the cooler tube, despite its general forward movement, may start to slide backwards because at this point the transporting effect of the conical surface is diminished. However, the tongue of the cushion of material will under normal circunstances be kept away from the opening in the communicating chute because of the barrier formed by the conical surface 9. Thus the conical surface acts to prevent back-spill.
  • the charge in the cooler tube may be very high. For example it may be filled to 50 percent or more of its capacity. Some of the material may under such conditions reach the opening during the first of downward movement of the cooler tube, i.e. between its uppermost position and its position generally defined by a horizontal plane through the axis of the kiln. Any material which does then pass into the communicating chute will be trapped by the knee bend formed by the pipe sections 11 and 12 and thus prevented from reentering the kiln shell.
  • a rotary kiln having a plurality of cooler tubes mounted in planetary fashion around the outlet end of the kiln with the inlet end of each tube connected to the outlet end of the kiln by a communicating chute substantially tangentially disposed with respect to the cooler tube, the improvement which comprises said chute having a first pipe communicating with the outlet end of the kiln, and a second pipe in communicating angular relationship with the first pipe such that backspilling material is trapped and is prevented from reentering the kiln, and a conical wall forms at least a part of the inlet end of each cooler tube, said conical wall having a conical surface concave to the cooler tube, said conical surface being oriented so as to cooperate with the tangentially mounted communicating chute to advance material entering the cooler tube away from the opening in the communicating chute.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)
US00288490A 1971-09-20 1972-09-13 Cooler tubes for rotary kiln Expired - Lifetime US3813211A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4376671 1971-09-20

Publications (1)

Publication Number Publication Date
US3813211A true US3813211A (en) 1974-05-28

Family

ID=10430231

Family Applications (1)

Application Number Title Priority Date Filing Date
US00288490A Expired - Lifetime US3813211A (en) 1971-09-20 1972-09-13 Cooler tubes for rotary kiln

Country Status (13)

Country Link
US (1) US3813211A (xx)
JP (1) JPS5536907B2 (xx)
AU (1) AU468078B2 (xx)
BE (1) BE788998A (xx)
BR (1) BR7206511D0 (xx)
CA (1) CA970561A (xx)
DE (1) DE2245995C2 (xx)
ES (1) ES406831A1 (xx)
FR (1) FR2154125A5 (xx)
GB (1) GB1306305A (xx)
IT (1) IT967573B (xx)
SE (1) SE385617B (xx)
ZA (1) ZA726081B (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920381A (en) * 1973-02-01 1975-11-18 Polysius Ag Rotary furnace having a planetary cooler
US3994677A (en) * 1974-04-17 1976-11-30 Polysius Ag Rotary kiln with planetary coolers
US4243384A (en) * 1978-04-11 1981-01-06 F. L. Smidth & Company Rotary kiln
US4876971A (en) * 1988-08-29 1989-10-31 Oconnor Chadwell Water cooled incinerator
US6138377A (en) * 1999-07-21 2000-10-31 United States Gypsum Company Apparatus and process for cooling and de-steaming calcined stucco

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50123273A (xx) * 1974-03-16 1975-09-27
DE2966242D1 (en) * 1979-03-08 1983-11-10 Creusot Loire Junction device between a rotary kiln and planetary coolers
JPS614045Y2 (xx) * 1980-04-15 1986-02-07

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US828555A (en) * 1904-12-23 1906-08-14 Paul O Krottnaurer Rotary kiln.
US2904322A (en) * 1955-03-15 1959-09-15 Elektrokemisk As Arrangement for discharge of material from rotary kilns
US3279775A (en) * 1964-11-25 1966-10-18 Allis Chalmers Mfg Co Cooler for rotary kiln
US3372915A (en) * 1965-09-28 1968-03-12 Smidth & Co As F L Rotary kiln assemblies
US3556495A (en) * 1968-01-22 1971-01-19 Smidth & Co As F L Rotary kilns with planetary coolers
US3643933A (en) * 1970-11-05 1972-02-22 Allis Chalmers Mfg Co Cooler for rotary kiln

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6606702U (de) * 1967-05-17 1970-11-19 Polysius Ag Drehrohrofenkuehler
GB1137246A (en) * 1967-09-22 1968-12-18 Smidth & Co As F L Rotary kilns with cooler tubes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US828555A (en) * 1904-12-23 1906-08-14 Paul O Krottnaurer Rotary kiln.
US2904322A (en) * 1955-03-15 1959-09-15 Elektrokemisk As Arrangement for discharge of material from rotary kilns
US3279775A (en) * 1964-11-25 1966-10-18 Allis Chalmers Mfg Co Cooler for rotary kiln
US3372915A (en) * 1965-09-28 1968-03-12 Smidth & Co As F L Rotary kiln assemblies
US3556495A (en) * 1968-01-22 1971-01-19 Smidth & Co As F L Rotary kilns with planetary coolers
US3643933A (en) * 1970-11-05 1972-02-22 Allis Chalmers Mfg Co Cooler for rotary kiln

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920381A (en) * 1973-02-01 1975-11-18 Polysius Ag Rotary furnace having a planetary cooler
US3994677A (en) * 1974-04-17 1976-11-30 Polysius Ag Rotary kiln with planetary coolers
US4243384A (en) * 1978-04-11 1981-01-06 F. L. Smidth & Company Rotary kiln
US4876971A (en) * 1988-08-29 1989-10-31 Oconnor Chadwell Water cooled incinerator
US6138377A (en) * 1999-07-21 2000-10-31 United States Gypsum Company Apparatus and process for cooling and de-steaming calcined stucco

Also Published As

Publication number Publication date
BE788998A (fr) 1973-01-15
CA970561A (en) 1975-07-08
AU4681572A (en) 1974-03-28
FR2154125A5 (xx) 1973-05-04
IT967573B (it) 1974-03-11
BR7206511D0 (pt) 1973-09-18
GB1306305A (xx) 1973-02-07
DE2245995A1 (de) 1973-03-29
DE2245995C2 (de) 1983-05-26
ZA726081B (en) 1973-06-27
SE385617B (sv) 1976-07-12
JPS5536907B2 (xx) 1980-09-24
AU468078B2 (en) 1975-12-18
ES406831A1 (es) 1975-10-16
JPS4840824A (xx) 1973-06-15

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