WO2013093212A1 - Dispositif de refroidissement d'une embouchure d'un four tubulaire rotatif par soufflage d'air frais - Google Patents
Dispositif de refroidissement d'une embouchure d'un four tubulaire rotatif par soufflage d'air frais Download PDFInfo
- Publication number
- WO2013093212A1 WO2013093212A1 PCT/FR2011/000678 FR2011000678W WO2013093212A1 WO 2013093212 A1 WO2013093212 A1 WO 2013093212A1 FR 2011000678 W FR2011000678 W FR 2011000678W WO 2013093212 A1 WO2013093212 A1 WO 2013093212A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cylinder
- distribution chamber
- furnace
- fan
- air
- Prior art date
Links
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
- F27B7/383—Cooling devices for the charge
-
- 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
- F27B7/22—Rotary drums; Supports therefor
- F27B7/224—Discharge ends
-
- 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
- F27B7/383—Cooling devices for the charge
- F27B7/386—Rotary-drum cooler
-
- 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
- TITLE Device for cooling a mouth of a rotary tubular furnace by blowing fresh air.
- the invention relates to a device for cooling a mouth of a rotary tubular furnace by blowing fresh air.
- the field of the invention is that of rotary tubular furnaces, in particular furnaces used in the calcination of mineral materials, such as for example in the manufacture of cement clinker.
- a rotary tubular furnace essentially consists of a metal cylinder, usually called ferrule, whose inner wall is protected by a refractory material such as brick or concrete. Materials are introduced into the cylinder of the furnace inside which they are intended to be fired. During cooking, the oven cylinder is rotated on its axis.
- each end of the metal cylinder enters a fixed box in which hot gases circulate, thus ensuring the continuity of the treatment circuit between the rotary kiln and the fixed parts of the installation of which the furnace is part.
- the outlet end of hot materials conventionally comprises a burner and is often the hottest part of the oven cylinder. At this end, the furnace cylinder is thus subjected to high thermal stresses and it is necessary to cool to ensure its protection.
- This end of the metal cylinder is further protected by a protective device which comprises one or more end pieces, metal, fixed to the end of the cylinder, covered with a refractory lining.
- Cooling is generally done by blowing fresh air, and it is known to channel air along the wall of the furnace cylinder by constructing several envelopes around the cylinder. (FR-2,443,654 and FR-2,494,827). In known cooling devices, the fans that provide the air necessary for cooling are fixed relative to the frame.
- these fans blow in front of one of the annular channels, directly or via a distribution line. Only a part of the air enters the canal, the rest escaping into the ambient atmosphere. Cooling is uncertain unless there is a high excess of ventilation capacity. .
- a rotary joint has a fixed ring surrounding the cylinder, provided with a sliding system on the surface of the cylinder and ensures the airtightness between the fans and one of the annular channels. .
- the air losses are avoided, but the sealing system is subject to heavy wear, requiring regular maintenance.
- the object of the present invention is to overcome the aforementioned drawbacks by proposing a device for cooling a mouth of a rotary tubular furnace by fresh air blowing, easy maintenance and improved cooling performance.
- Another object of the present invention is to provide an increased safety cooling device in the case of a fan stop.
- the invention relates to a device for cooling a mouth of a rotary kiln by blowing fresh air, said furnace comprising a metal cylinder internally coated with a refractory material, said cylinder being rotatably mounted relative to the frame of the furnace, within which materials are intended to be introduced and cooked,
- said cooling device comprising: ⁇
- inner envelope and outer envelope said two envelopes surrounding said furnace cylinder and constituting two annular channels between, on the one hand, said cylinder and said inner envelope, said first channel, and on the other hand, between said inner envelope and said outer envelope, said second channel,
- Ventilation means adapted to allow the circulation of fresh air in said annular channels
- said cooling device comprises:
- a distribution chamber annular, surrounding said cylinder and fixed to said furnace cylinder, supplying air to said first channel
- said ventilation means comprising at least one fan and an electric motor actuating said at least one fan, said ventilation means being embarked on the metal cylinder of the furnace, mounted rotating with it, supplying said chamber with airtightness; distribution,
- annular rings are placed on the distribution chamber, disposed on the wall of said outermost distribution chamber relative to the furnace cylinder;
- the distribution chamber has vent holes on said wall of the outermost distribution chamber with respect to the furnace cylinder so as to let a minor fraction of the air blown by said ventilation means, representing in particular between 2% and 20% of the air blown by said ventilation means;
- An annular screen is disposed between said exhaust opening of the second channel and said electrical connectors, rotating;
- the annular rings are rigidly secured to the furnace cylinder, and the contacts, rotating or sliding, are integral with the frame, the contacts being free in translation along an axis parallel to the axis of the cylinder by means of guiding means. translation between said contacts and the oven frame so as to follow the displacement of the annular rings during the expansion / retraction of the furnace cylinder;
- the fresh air sucked by said at least one fan circulates in an envelope surrounding the electric motor of said fan before it enters the fan;
- the device comprises several fans supplying fresh air, in parallel, said distribution chamber via independent circuits respectively joining each of the fans to said distribution chamber, an automatic closing valve being associated with each of said fans, adapted to closing said corresponding circuit joining said fan and said distribution chamber in the case of a stop of said fan.
- FIG. 1 is a schematic view, in partial section, of a cooling device according to the invention.
- FIG. 2 is a view of the cooling device according to Figure 1, supplemented with the distribution chamber and ventilation means.
- FIG. 3 is a schematic view of a cooling device according to the invention, according to one embodiment, comprising a plurality of fans.
- the invention relates to a device 100 for cooling a mouth of a rotary tubular furnace 1 by blowing fresh air.
- the furnace comprises a metal cylinder 3 coated internally with a refractory material 73, which cylinder 3 is rotatably mounted relative to the furnace frame.
- Materials, especially mineral, are intended to be introduced into the cylinder 3 and are intended to be cooked inside the cylinder 3.
- It may especially be a rotary kiln of a plant for the calcination of mineral materials, for example used for the production of cement clinker.
- each end of the metal cylinder 3 enters a fixed box in which hot gases circulate, thus ensuring the continuity of the treatment circuit between the rotary kiln and the fixed parts of the installation of which the furnace is part.
- the outlet end of hot materials conventionally comprises a burner and is often the hottest part of the oven cylinder. At this end, the furnace cylinder is thus subjected to high thermal stresses and it is necessary to cool to ensure its protection.
- This end enters a fixed box 2, usually called heating cover.
- a sealing device 20 closes the circuit of the installation between the fixed box 2 and the mobile cylinder 3 of the rotary tubular furnace, in particular cooperating with an outer casing 6 which will be described later.
- This end of the metal cylinder is moreover protected by a protective device which comprises one or more end pieces 4 of the cylinder, metal, fixed to the end of the cylinder, covered with a refractory material 74, such as brick or concrete.
- the end piece or parts 4 are disposed inside the fixed box 2.
- this end piece 4 may actually consist of several metal parts distributed around the periphery of the cylinder 3, and fixed at one end of said cylinder.
- the end piece 4, metal may have an outer wall 41, in particular concave, facilitating the lining and attachment of the refractory material 74, a flange 43 extending outwardly of the cylinder 3 of the furnace, and a flange 42 extending towards the axis of the cylinder 3, in particular covering the edge of the refractory material 73 disposed on the inner wall of the cylinder 3.
- Said cooling device 100 comprises:
- Ventilation means adapted to allow the circulation of fresh air in said annular channels 50, 60.
- the air flow is effected in said first channel 50 to the end piece 4, then in the opposite direction in said second channel 60, before exhausting air through an exhaust opening of said second channel 60.
- the air is thus blown from the outside of the stationary box 2 into the first channel 50.
- the air licks the cylinder 3, then licks the end piece 4, in particular the wing 43 cooling the cylinder 3 and said end piece 4.
- the air flows in the opposite direction in the second channel 60 from the inside of the fixed box 2, towards the outside where it escapes through an opening of exhaust of the second channel 60.
- the inner envelope 5 is arranged at a distance from the end piece 4 so as to create an annular passage 51 between the first channel 50 and the second channel 60.
- This passage 51 is defined between the piece of end 4, the inner casing 5 and the outer casing 6.
- the outer casing 6 is in airtight contact with the flange 43 of the end piece 4.
- said cooling device comprises:
- said ventilation means comprising at least one fan 9 and an electric motor actuating said at least one fan 9, said ventilation means being embarked on the metal cylinder 3 of the furnace, mounted rotating with it, supplying airtightness said distribution chamber 8,
- the fan or fans 9 of the ventilation means are integral with the cylinder 3 of the rotary kiln, for supplying the first channel 50 with compressed air, avoiding or even severely limiting the air losses, and without the use of a rotary joint as known from the state of the art.
- the supply of air blown by the ventilation means is effected by means of a distribution chamber 8 whose function is to distribute homogeneously the flow of air blown over the entire annular section of the first channel 50.
- the section of the distribution chamber is thus dimensioned for this purpose.
- the fan or fans 9 are driven by one or more electric motors, the power supply is provided through the electrical connectors 10, 11, rotating.
- the annular rings 10 are rigidly secured to the cylinder 3 of the furnace 1, and the contacts 11, rotating or sliding, are integral with the fixed frame.
- the number of annular rings 10 depends on the electrical connection mode of the motors.
- the number of rings will be, for example, at least three (i.e. three) for motors operating with three-phase current and two for motors operating in single-phase alternating current or direct current.
- annular ring (and an associated contact) may be added for an additional signal for controlling the electric motor (s) 9.
- the annular distribution chamber 8 can be made between the outer wall of the cylinder 3 and an annular cowling 80 extending the inner envelope 5.
- the metal cylinder 3 of the furnace, protected by the refractory material 73 inside, can reach several hundred degrees Celsius, even in its part located in the open air.
- the annular rings 10 can be placed on the distribution chamber 8, which is kept at a low temperature by the air circulating thereon, on the wall of said distribution chamber 8 the outermost by relative to the cylinder 3 of the furnace 1.
- This distribution chamber 8 may be of rectangular section.
- the distribution chamber 8 may include vent holes 14 on said wall of the outermost distribution chamber relative to the cylinder of the oven 1 so as to let out a fraction. minor air blown by said ventilation means.
- This minor fraction can represent between 2% and 20% of the air blown by said ventilation means and makes it possible to ensure the cooling of the annular rings 10.
- the electrical conductors 10, 11 may be protected from the hot air stream escaping from the second channel 60 by means of an annular screen 12 disposed between said exhaust opening of the second channel 60 and said rotating electrical connectors 10, 11.
- the cylinder 3 of the furnace being subjected to expansion / retraction due to variations in its temperature, the position of the annular rings 10 along the axis of the cylinder 3 is not unique with respect to a fixed reference.
- the contacts 11 may be free in translation along an axis parallel to the axis of the cylinder 3 by means of guide means in translation between said contacts 11 and the frame of the oven so as to follow the displacement of the annular rings 10 during the expansion / retraction of the furnace cylinder.
- the ventilation means may comprise several fans 9 supplying fresh air, in parallel, said distribution chamber 8 via independent circuits respectively joining each of the fans 9 to said chamber of distribution 8.
- a self-closing valve 15 can be associated with each of said fans 9, able to close said corresponding circuit joining said fan 9 and said chamber distribution 8 in the case of a stop of said fan ( Figure 3).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112014015246-2A BR112014015246B1 (pt) | 2011-12-23 | 2011-12-23 | Dispositivo para resfriar a abertura de um forno de secagem rotativo por meio de sopro de ar frio |
EP11815761.9A EP2795217B1 (fr) | 2011-12-23 | 2011-12-23 | Dispositif de refroidissement d'une embouchure d'un four tubulaire rotatif par soufflage d'air frais |
JP2014548124A JP6043363B2 (ja) | 2011-12-23 | 2011-12-23 | 冷却用空気の送風による回転式管状炉の開口部の冷却装置 |
PCT/FR2011/000678 WO2013093212A1 (fr) | 2011-12-23 | 2011-12-23 | Dispositif de refroidissement d'une embouchure d'un four tubulaire rotatif par soufflage d'air frais |
PL11815761T PL2795217T3 (pl) | 2011-12-23 | 2011-12-23 | Urządzenie do chłodzenia wylotu obrotowego pieca rurowego przez wdmuchiwanie chłodnego powietrza |
MX2014007636A MX345436B (es) | 2011-12-23 | 2011-12-23 | Dispositivo para enfriar la abertura de un horno giratorio por soplado de aire frio. |
US14/367,676 US9746243B2 (en) | 2011-12-23 | 2011-12-23 | Device for cooling the opening of a rotary kiln by means of cool air-blowing |
CA2858156A CA2858156C (fr) | 2011-12-23 | 2011-12-23 | Dispositif de refroidissement d'une embouchure d'un four tubulaire rotatif par soufflage d'air frais |
CN201180075538.3A CN104053962B (zh) | 2011-12-23 | 2011-12-23 | 以吹冷空气的方式冷却回转炉开口的装置 |
ES11815761.9T ES2566782T3 (es) | 2011-12-23 | 2011-12-23 | Dispositivo de refrigeración de una boca de un horno tubular rotatorio por soplado de aire fresco |
DK11815761.9T DK2795217T3 (en) | 2011-12-23 | 2011-12-23 | Device for the cooling of the opening of a rotary kiln by means of cold air blowing |
UAA201406896A UA109741C2 (uk) | 2011-12-23 | 2011-12-23 | Пристрій для охолодження отвору обертової випалювальної печі за допомогою продування холодним повітрям |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/FR2011/000678 WO2013093212A1 (fr) | 2011-12-23 | 2011-12-23 | Dispositif de refroidissement d'une embouchure d'un four tubulaire rotatif par soufflage d'air frais |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013093212A1 true WO2013093212A1 (fr) | 2013-06-27 |
Family
ID=45563424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2011/000678 WO2013093212A1 (fr) | 2011-12-23 | 2011-12-23 | Dispositif de refroidissement d'une embouchure d'un four tubulaire rotatif par soufflage d'air frais |
Country Status (12)
Country | Link |
---|---|
US (1) | US9746243B2 (fr) |
EP (1) | EP2795217B1 (fr) |
JP (1) | JP6043363B2 (fr) |
CN (1) | CN104053962B (fr) |
BR (1) | BR112014015246B1 (fr) |
CA (1) | CA2858156C (fr) |
DK (1) | DK2795217T3 (fr) |
ES (1) | ES2566782T3 (fr) |
MX (1) | MX345436B (fr) |
PL (1) | PL2795217T3 (fr) |
UA (1) | UA109741C2 (fr) |
WO (1) | WO2013093212A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220018599A1 (en) * | 2018-11-30 | 2022-01-20 | Thyssenkrupp Industrial Solutions Ag | Kiln comprising a protective segment at the kiln outlet |
US12018890B2 (en) * | 2018-11-30 | 2024-06-25 | thyssenkrupp Polysius GmbH | Kiln comprising a protective segment at the kiln outlet |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107427582B (zh) * | 2015-04-30 | 2021-03-05 | 久光制药株式会社 | 多汗症治疗用外用剂 |
JP6518200B2 (ja) * | 2016-02-02 | 2019-05-22 | Jx金属株式会社 | ロータリーキルン炉の耐火物構造の施工方法 |
US10155190B2 (en) | 2016-10-20 | 2018-12-18 | General Electric Technology Gmbh | System and method for reducing carbon dioxide emissions from a flue gas |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2159118A5 (en) * | 1972-06-20 | 1973-06-15 | Steffens Gmbh Karl | Cooling of rotary kilns - to protect exit lip against high temp distortion |
FR2410802A1 (fr) * | 1977-12-05 | 1979-06-29 | Fives Cail Babcock | Dispositif de protection de l'embouchure d'un four rotatif |
EP0053049A1 (fr) * | 1980-11-21 | 1982-06-02 | FIVES-CAIL BABCOCK, Société anonyme | Dispositif de protection de l'embouchure d'un four rotatif |
EP0228650A1 (fr) * | 1985-12-23 | 1987-07-15 | Ppg Industries, Inc. | Col de four rotatif refroidi à l'air |
EP1580509A1 (fr) * | 2004-03-26 | 2005-09-28 | KHD Humboldt Wedag GmbH | Embouchure d'un four rotatif |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53145367A (en) * | 1977-05-23 | 1978-12-18 | Kawasaki Heavy Ind Ltd | Rotary kiln furnace |
FR2443654A1 (fr) | 1978-12-07 | 1980-07-04 | Fives Cail Babcock | Dispositif de protection de l'embouchure d'un four rotatif |
US4376280A (en) * | 1981-04-01 | 1983-03-08 | The Direct Reduction Corporation | Instrument system for iron oxide reducing kilns |
US4836775A (en) * | 1985-12-23 | 1989-06-06 | Ppg Industries, Inc. | Air cooled rotary kiln collar |
JP2517642Y2 (ja) * | 1991-05-09 | 1996-11-20 | 株式会社タクマ | ロータリーキルン |
JP2006029667A (ja) * | 2004-07-15 | 2006-02-02 | Kogure Seisakusho:Kk | ロータリキルンのシェル冷却装置及び冷却方法並びにロータリキルンの排熱回収方法 |
-
2011
- 2011-12-23 BR BR112014015246-2A patent/BR112014015246B1/pt active IP Right Grant
- 2011-12-23 WO PCT/FR2011/000678 patent/WO2013093212A1/fr active Application Filing
- 2011-12-23 JP JP2014548124A patent/JP6043363B2/ja not_active Expired - Fee Related
- 2011-12-23 CN CN201180075538.3A patent/CN104053962B/zh active Active
- 2011-12-23 EP EP11815761.9A patent/EP2795217B1/fr active Active
- 2011-12-23 UA UAA201406896A patent/UA109741C2/ru unknown
- 2011-12-23 PL PL11815761T patent/PL2795217T3/pl unknown
- 2011-12-23 ES ES11815761.9T patent/ES2566782T3/es active Active
- 2011-12-23 US US14/367,676 patent/US9746243B2/en active Active
- 2011-12-23 DK DK11815761.9T patent/DK2795217T3/en active
- 2011-12-23 MX MX2014007636A patent/MX345436B/es active IP Right Grant
- 2011-12-23 CA CA2858156A patent/CA2858156C/fr not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2159118A5 (en) * | 1972-06-20 | 1973-06-15 | Steffens Gmbh Karl | Cooling of rotary kilns - to protect exit lip against high temp distortion |
FR2410802A1 (fr) * | 1977-12-05 | 1979-06-29 | Fives Cail Babcock | Dispositif de protection de l'embouchure d'un four rotatif |
EP0053049A1 (fr) * | 1980-11-21 | 1982-06-02 | FIVES-CAIL BABCOCK, Société anonyme | Dispositif de protection de l'embouchure d'un four rotatif |
EP0228650A1 (fr) * | 1985-12-23 | 1987-07-15 | Ppg Industries, Inc. | Col de four rotatif refroidi à l'air |
EP1580509A1 (fr) * | 2004-03-26 | 2005-09-28 | KHD Humboldt Wedag GmbH | Embouchure d'un four rotatif |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220018599A1 (en) * | 2018-11-30 | 2022-01-20 | Thyssenkrupp Industrial Solutions Ag | Kiln comprising a protective segment at the kiln outlet |
US12018890B2 (en) * | 2018-11-30 | 2024-06-25 | thyssenkrupp Polysius GmbH | Kiln comprising a protective segment at the kiln outlet |
Also Published As
Publication number | Publication date |
---|---|
ES2566782T3 (es) | 2016-04-15 |
JP6043363B2 (ja) | 2016-12-14 |
MX345436B (es) | 2017-01-30 |
CA2858156C (fr) | 2018-12-04 |
CN104053962B (zh) | 2016-06-22 |
US20140377713A1 (en) | 2014-12-25 |
US9746243B2 (en) | 2017-08-29 |
JP2015508483A (ja) | 2015-03-19 |
BR112014015246B1 (pt) | 2018-04-10 |
EP2795217B1 (fr) | 2016-03-02 |
DK2795217T3 (en) | 2016-04-04 |
CA2858156A1 (fr) | 2013-06-27 |
EP2795217A1 (fr) | 2014-10-29 |
MX2014007636A (es) | 2014-09-26 |
BR112014015246A8 (pt) | 2017-06-13 |
PL2795217T3 (pl) | 2016-06-30 |
UA109741C2 (uk) | 2015-09-25 |
BR112014015246A2 (pt) | 2017-06-13 |
CN104053962A (zh) | 2014-09-17 |
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