EP0047680A1 - Refroidisseur planétaire pour four tubulaire rotatif - Google Patents

Refroidisseur planétaire pour four tubulaire rotatif Download PDF

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Publication number
EP0047680A1
EP0047680A1 EP81401192A EP81401192A EP0047680A1 EP 0047680 A1 EP0047680 A1 EP 0047680A1 EP 81401192 A EP81401192 A EP 81401192A EP 81401192 A EP81401192 A EP 81401192A EP 0047680 A1 EP0047680 A1 EP 0047680A1
Authority
EP
European Patent Office
Prior art keywords
tube
oven
partition
upstream
propeller
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Withdrawn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
EP81401192A
Other languages
German (de)
English (en)
French (fr)
Inventor
Roland Rizzato
René Mazencieux
José Sanzey
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.)
Fives Cail Babcock SA
Original Assignee
Fives Cail Babcock SA
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 Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Publication of EP0047680A1 publication Critical patent/EP0047680A1/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Withdrawn legal-status Critical Current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
    • F27B7/38—Arrangements of cooling devices
    • F27B7/40—Planetary coolers
    • 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
    • F27B7/14—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge

Definitions

  • the present invention relates to planetary coolers constituted by a series of tubes mounted in satellite around an oven for cooling the materials leaving the oven, each tube being connected to an outlet opening of the oven by a communication chute.
  • the hot material falls, through the outlet openings and the communication troughs, into the cooling tubes when they come in the low position. Air is sucked or blown into the tubes, against the flow of the hot material, to cool it, and enters the furnace through the outlet openings.
  • the heat exchanges take place essentially by conduction at the level of the free face of the embankment of materials; although this face is constantly renewed, thanks to the rotation of the tubes, the heat exchanges are low.
  • each tube is divided into two compartments by a partition situated in a diametral plane and whose upstream end, considering the direction of circulation of the hot material, is distant from the communication chute, and in its part located immediately upstream of the partition, the wall of each tube is provided with two parallel helices, offset by 180 ° and delimiting two corridors each opening into a compartment, these two corridors communicating with each other by regularly spaced openings over their entire length and allowing the passage of material from one corridor to another and only from upstream to downstream.
  • These propellers can advantageously be formed from a series of elements arranged in the manner of louvers, so as to form between them openings making the corridors communicate.
  • the inlet end of the tubes is closed by an inclined bottom and provided with at least one propeller to large step which moves the material downstream during the upward stroke of the tubes.
  • a sheet whose plane is substantially parallel to that defined by the axes of the tube and its chute is placed near the rear edge, considering the direction of rotation of the furnace, the latter and fixed to the wall of the tube, to its bottom and to the propeller to form a pocket where the material which has not been evacuated by the propeller is retained during the upward travel and part of the downward travel of the tube; the propeller ends at a certain distance from the bottom to allow material near the bottom to enter this pocket.
  • the compartments are provided with propeller sections fixed on their cylindrical wall and blades fixed on the partition which ensure the movement of the material towards the outlet of the tubes.
  • these propellers are formed of a series of elements arranged in the manner of louvers and the elements located near the partition have a height greater than that of the other elements.
  • the reference number 10 designates a rotary tubular oven used for the heat treatment of a material moving from one end to the other under the effect of the slope and of the rotation of the oven.
  • the oven carries a series of cooler tubes 12 arranged in satellites at its periphery and connected to the oven by chutes 14; a single tube has been shown in Figures 1 and 2.
  • the hot material falls from the oven into the cooler tubes, when these are in the low position, through openings in the wall of the oven and to which the ducts are connected. In the cooling tubes, the material moves in the opposite direction to a stream of fresh air which then enters the oven.
  • Each cooling tube is constituted by a ferrule tone metal with circular section. Its upstream end adjacent to the chute, is closed by an inclined bottom 16, placed under the chute so that the hot material falling from the oven when the tube is in the low position slides on this bottom and is moved away from its point of fall. the other end of the tube is partially closed by a notched disc 18 which leaves an outlet opening 20. At this same end, an opening 22 is cut in the shell; this opening occupies approximately the same angular position as the opening 20 and is provided with a grid 24 forming a screen. The fine particles of the material passing through this grid are discharged through the opening 22, while the rejects are discharged through the opening 20.
  • the upstream end of the cooler tube which receives the hot material falling from the oven is provided with an inner jacket 26 to prevent this part of the shell and the bottom 16 from being subjected to excessive thermal stresses.
  • Two large pitch propellers 28 are fixed on the jacket 26; their role is to separate the material from the bottom 16, during the upward stroke of the tubes to prevent it from falling back into the furnace when the tubes are in the high position.
  • a sheet 30 ( Figure 2) whose plane is substantially parallel to that defined by the axes of the tube and the chute is placed at the rear, considering the direction of rotation of the oven indicated by an arrow in Figure 2, the chute and near the edge of it. It is fixed to the jacket 26 and to the adjacent propeller 28 so as to form a pocket 32 where the material which has not been spread by the propellers 28 is housed when the cooling tube is in the upper part of its race; this prevents this material from falling back into the oven when the tube is in the high position.
  • the propeller 28 to which the sheet 30 is fixed ends at a certain distance from the bottom 16, as can be seen in FIG. 4, so as to provide a passage 33 allowing the material being in this zone, to the before the propeller, to enter the pocket 32. If the propeller extended to the bottom 16, a certain volume of material could accumulate on the propeller in this area and then fall back into the oven.
  • the downstream part of the cooling tube is divided into two semi-cylindrical compartments by a diametrical partition 34.
  • Each compartment is provided with organs ensuring the progression of the material.
  • organs are constituted by inclined blades 36 fixed on the partition 34 and by blades 38 fixed on the ferrule of the tube and arranged in the manner of louvers along several propellers; as seen in Figure 3, the blades 38 located near the partition are higher than the others to prevent the material that accumulates in these areas for certain positions of the tube from falling back overflowing over the blades .
  • the tube is provided with two propellers 40, parallel and offset by 180 °.
  • These propellers are formed of a series of elements arranged in the manner of louvers and fixed on the ferrule. They delimit two corridors42 and 44 each leading to a compartment. The role of these propellers is to distribute equally between the two compartments the material which is brought to them by the propellers 28.
  • the elements of the propellers 40 are arranged so as to make the two corridors communicate by means of openings regularly spaced along their entire length and allow the passage of material from one corridor to another only from upstream to downstream. Thus, if one of the lanes is overloaded, the material will pass into the other lane so that when they exit the material flows introduced into the two compartments will be substantially equal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Furnace Details (AREA)
EP81401192A 1980-09-10 1981-07-24 Refroidisseur planétaire pour four tubulaire rotatif Withdrawn EP0047680A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8019487A FR2489947A1 (fr) 1980-09-10 1980-09-10 Refroidisseur planetaire pour four tubulaire rotatif
FR8019487 1980-09-10

Publications (1)

Publication Number Publication Date
EP0047680A1 true EP0047680A1 (fr) 1982-03-17

Family

ID=9245787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401192A Withdrawn EP0047680A1 (fr) 1980-09-10 1981-07-24 Refroidisseur planétaire pour four tubulaire rotatif

Country Status (4)

Country Link
EP (1) EP0047680A1 (enExample)
ES (1) ES8204531A1 (enExample)
FR (1) FR2489947A1 (enExample)
OA (1) OA06872A (enExample)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR705222A (fr) * 1930-11-06 1931-06-02 Susset Ets Four rotatif
US2001258A (en) * 1932-09-13 1935-05-14 Smidth & Co As F L Rotary kiln and cooler
US4131418A (en) * 1977-05-23 1978-12-26 Fuller Company Tube coolers for rotary kilns

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR705222A (fr) * 1930-11-06 1931-06-02 Susset Ets Four rotatif
US2001258A (en) * 1932-09-13 1935-05-14 Smidth & Co As F L Rotary kiln and cooler
US4131418A (en) * 1977-05-23 1978-12-26 Fuller Company Tube coolers for rotary kilns

Also Published As

Publication number Publication date
FR2489947B1 (enExample) 1985-05-17
ES503695A0 (es) 1982-05-16
FR2489947A1 (fr) 1982-03-12
OA06872A (fr) 1983-02-28
ES8204531A1 (es) 1982-05-16

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): BE DE GB IT

17P Request for examination filed

Effective date: 19820426

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19840406

RIN1 Information on inventor provided before grant (corrected)

Inventor name: RIZZATO, ROLAND

Inventor name: MAZENCIEUX, RENE

Inventor name: SANZEY, JOSE