BE858730A - METHOD AND DEVICE FOR INCREASING THE CALORIFIC EXCHANGES BETWEEN SOLID MATERIAL AND GAS, IN A ROTARY CEMENT OVEN - Google Patents

METHOD AND DEVICE FOR INCREASING THE CALORIFIC EXCHANGES BETWEEN SOLID MATERIAL AND GAS, IN A ROTARY CEMENT OVEN

Info

Publication number
BE858730A
BE858730A BE180935A BE180935A BE858730A BE 858730 A BE858730 A BE 858730A BE 180935 A BE180935 A BE 180935A BE 180935 A BE180935 A BE 180935A BE 858730 A BE858730 A BE 858730A
Authority
BE
Belgium
Prior art keywords
emi
bucket
wall
furnace
slope
Prior art date
Application number
BE180935A
Other languages
French (fr)
Original Assignee
Obourg Sa Ciments
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 Obourg Sa Ciments filed Critical Obourg Sa Ciments
Priority to BE180935A priority Critical patent/BE858730A/en
Publication of BE858730A publication Critical patent/BE858730A/en
Priority to DE19782828482 priority patent/DE2828482C3/en

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
    • F27B7/14—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge
    • F27B7/16—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means
    • 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
    • F27B7/16—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means
    • F27B7/161—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means the means comprising projections jutting out from the wall
    • F27B7/162—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means the means comprising projections jutting out from the wall the projections consisting of separate lifting elements, e.g. lifting shovels

Description

       

  Procédé et dispositif pour augmenter les échanges calorifiques

  
 <EMI ID=1.1>   <EMI ID=2.1> 

  
d'utiliser^ pour accroître les échanges calorifiques entre la.. matière solide en fines particules et les gaz, divers dispositifs

  
 <EMI ID=3.1> 

  
à la partie inférieure du four. De tels dispositifs sont par ;

  
exemple constitués de palettes ou de godets releveurs en acier, 

  
ou encore de croisillons en briques rêfractaires . Ces dispositifs entraînent la matière solide sur un parcours relativement réduit 

  
 <EMI ID=4.1> 

  
En effet, il est important en vue d'obtenir un bon rendement ' d'accroître au maximum les échanges calorifiques entre matière 

  
 <EMI ID=5.1> 

  
four, se limitent principalement à la surface du talus en contact avec les gaz. 

  
Les dispositifs utilisés à ce jour et mentionnés cidessus présentent cependant le grave inconvénient de mettre en suspension dans les gaz une grande quantité de fines particules solides, de sorte qu'à la sortie du four les gaz présentent une teneur en poussière très élevée. On est'alors obligé de prévoir un dépoussiérage important des gaz avant de les libérer dans  l'atmosphère. 

  
 <EMI ID=6.1> 

  
inconvénients en prévoyant un procédé et un dispositif qui, d'une part, permettent d'utiliser au maximum les échanges calorifiques par rayonnement et par conduction et, d'autre part, évitent la mise en suspension de particules de poussière dans une région  proche du centre du fours c'est-à-dire à l'endroit où les gaz

  
ont leur vitesse la plus élevée'. 

  
Le procédé suivant l'invention, utilisable dans les fours rotatifs à ciment qui pivotent autour d'un axe central et dont la paroi interne, en contact avec la matière, effectue donc symétriquement par rapport au plan vertical passant par l'axe du  four, un parcours ascendant et un parcours descendant, se carac- ; 

  
 <EMI ID=7.1> 

  
 <EMI ID=8.1>   <EMI ID=9.1> 

  
de la paroi,  " prélever clans ce&#65533; premier talus uns certains quantité de 

  
 <EMI ID=10.1> 

  
 <EMI ID=11.1> 

  
 <EMI ID=12.1> 

  
 <EMI ID=13.1> 

  
 <EMI ID=14.1> 

  
sur la partie du parcours ascendant au-delà du talus et  sur une partie du parcours descendant, 
- libérer cette quantité de matière à proximité de la paroi <EMI ID=15.1> 

  
 <EMI ID=16.1> 

  
 <EMI ID=17.1> 

  
constituer par la chute de la matière libérée au moins un

  
 <EMI ID=18.1> 

  
dant de la paroi du four. 

  
L'invention a également pour objet le dispositif

  
 <EMI ID=19.1> 

  
L'invention sera mieux comprise en se reportant à

  
la description en même temps qu'au dessin annexe qui représente, . uniquement à titre d'exemple, un mode de réalisation de l'invention et dans lequel 
- la Figure 1 est une coupe transversale dans un four ; rotatif à ciment comportant le dispositif de l'invention, <EMI ID=20.1> 

  
 <EMI ID=21.1> 

  
; de l'invention. 

  
Suivant le mode de réalisation représenté au dessin, la virole 1 d'un four rotatif à ciment comporte sur sa paroi interne une série de godets 2 répartis à intervalles angulaires égaux. Ces godets comportent chacun une ouverture 3 située vers ;

  
l'avant considéré dans le sens de rotation 4 de la virole. 

  
L'ouverture 3, adjacente à la paroi interne 5 de la  virole, est suivie d'une paroi avant 6, tandis qu'à l'arrière est prévue une palette brasseuse 7, l'extrémité supérieure de la paroi avant 6 et de la palette brasseuse 7 étant jointes par une 

  
 <EMI ID=22.1> 

  
 <EMI ID=23.1> 

  
 <EMI ID=24.1>   <EMI ID=25.1>  <EMI ID=26.1> 

  
dans le talus, et est rempli progressivement de matière au fur et

  
 <EMI ID=27.1> 

  
 <EMI ID=28.1> 

  
 <EMI ID=29.1> 

  
en sens Inversa du sens de rotation, et constituant la paroi

  
 <EMI ID=30.1> 

  
 <EMI ID=31.1> 

  
 <EMI ID=32.1> 

  
 <EMI ID=33.1>   <EMI ID=34.1> 

  
 <EMI ID=35.1> 

  
 <EMI ID=36.1> 

  
 <EMI ID=37.1> 

  
four, -la, matière .est . autorisée à s'écouler en contact direct avec

  
 <EMI ID=38.1> 

  
 <EMI ID=39.1> 

  
sur une partie importante du -parcours de la paroi, en étant sou- 

  
 <EMI ID=40.1> 

  
tout en étant, maintenue à l'abri d'un contact direct avec ces  derniers . 

  
Des résultats satisfaisants sont obtenus lorsque le

  
 <EMI ID=41.1> 

  
paroi avant de ce dernier a atteint une position angulaire située '

  
 <EMI ID=42.1> 

  
 <EMI ID=43.1> 

  
 <EMI ID=44.1> 

  
godet et la forme de celui-ci ont été -étudiés pour permettre un remplissage* -convenable par la ratière prélevée dans le talus [deg.]et

  
 <EMI ID=45.1> 

  
minée du godet-. 

  
 <EMI ID=46.1> 

  
 <EMI ID=47.1>  .mine du parcours descendant la paroi du four, ou encore des  godets articulés agencés pour prélever dans une_ certaine { <EMI ID=48.1>   <EMI ID=49.1> 



  Method and device for increasing heat exchange

  
 <EMI ID = 1.1> <EMI ID = 2.1>

  
to use ^ to increase the heat exchange between the solid matter in fine particles and the gases, various devices

  
 <EMI ID = 3.1>

  
at the bottom of the oven. Such devices are by;

  
example made of steel pallets or lifting buckets,

  
or even bricks in refractory bricks. These devices entrain the solid material over a relatively short path

  
 <EMI ID = 4.1>

  
In fact, in order to obtain a good yield, it is important to increase the heat exchange between matter as much as possible

  
 <EMI ID = 5.1>

  
furnace, are limited mainly to the surface of the slope in contact with the gases.

  
The devices used to date and mentioned above however have the serious drawback of suspending a large quantity of fine solid particles in the gases, so that at the outlet of the furnace the gases have a very high dust content. We are then obliged to provide for a significant dust removal of the gases before releasing them into the atmosphere.

  
 <EMI ID = 6.1>

  
disadvantages in providing a method and a device which, on the one hand, allow maximum use of heat exchange by radiation and by conduction and, on the other hand, prevent the suspension of dust particles in a region close to the center of the furnace, i.e. where the gases

  
have their highest speed '.

  
The method according to the invention, which can be used in rotary cement kilns which pivot about a central axis and whose internal wall, in contact with the material, therefore performs symmetrically with respect to the vertical plane passing through the axis of the kiln, an ascending course and a descending course, is charac-;

  
 <EMI ID = 7.1>

  
 <EMI ID = 8.1> <EMI ID = 9.1>

  
of the wall, "take from this first embankment a certain quantity of

  
 <EMI ID = 10.1>

  
 <EMI ID = 11.1>

  
 <EMI ID = 12.1>

  
 <EMI ID = 13.1>

  
 <EMI ID = 14.1>

  
on the part of the ascending course beyond the embankment and on part of the descending course,
- release this quantity of material near the wall <EMI ID = 15.1>

  
 <EMI ID = 16.1>

  
 <EMI ID = 17.1>

  
constitute by the fall of the material released at least one

  
 <EMI ID = 18.1>

  
from the oven wall.

  
The invention also relates to the device

  
 <EMI ID = 19.1>

  
The invention will be better understood by referring to

  
the description together with the accompanying drawing which represents,. purely by way of example, one embodiment of the invention and in which
- Figure 1 is a cross section through an oven; cement rotary comprising the device of the invention, <EMI ID = 20.1>

  
 <EMI ID = 21.1>

  
; of the invention.

  
According to the embodiment shown in the drawing, the shell 1 of a rotary cement kiln comprises on its internal wall a series of cups 2 distributed at equal angular intervals. These buckets each have an opening 3 located towards;

  
the front considered in the direction of rotation 4 of the shell.

  
The opening 3, adjacent to the internal wall 5 of the shell, is followed by a front wall 6, while at the rear is a stirring pallet 7, the upper end of the front wall 6 and of the stirring pallet 7 being joined by a

  
 <EMI ID = 22.1>

  
 <EMI ID = 23.1>

  
 <EMI ID = 24.1> <EMI ID = 25.1> <EMI ID = 26.1>

  
in the slope, and is gradually filled with material as it

  
 <EMI ID = 27.1>

  
 <EMI ID = 28.1>

  
 <EMI ID = 29.1>

  
in reverse direction of the direction of rotation, and constituting the wall

  
 <EMI ID = 30.1>

  
 <EMI ID = 31.1>

  
 <EMI ID = 32.1>

  
 <EMI ID = 33.1> <EMI ID = 34.1>

  
 <EMI ID = 35.1>

  
 <EMI ID = 36.1>

  
 <EMI ID = 37.1>

  
oven, -the, matter .is. allowed to flow in direct contact with

  
 <EMI ID = 38.1>

  
 <EMI ID = 39.1>

  
over an important part of the course of the wall, while being

  
 <EMI ID = 40.1>

  
while being, kept away from direct contact with them.

  
Satisfactory results are obtained when the

  
 <EMI ID = 41.1>

  
front wall of the latter has reached an angular position situated '

  
 <EMI ID = 42.1>

  
 <EMI ID = 43.1>

  
 <EMI ID = 44.1>

  
bucket and the shape of it have been -studied to allow a suitable filling * -by the dobby taken from the slope [deg.] and

  
 <EMI ID = 45.1>

  
mined bucket-.

  
 <EMI ID = 46.1>

  
 <EMI ID = 47.1> .mine of the path descending the wall of the furnace, or even articulated buckets arranged to take from a certain {<EMI ID = 48.1> <EMI ID = 49.1>

Claims (1)

<EMI ID=50.1> <EMI ID = 50.1> <EMI ID=51.1> <EMI ID = 51.1> maintenir prisonnière cette quantité de matière au moins : keep this quantity of material prisoner at least: sur la partie du parcours ascendant au-delà du talus et on the part of the ascending course beyond the embankment and sur uns partie du parcours descendant^ on a part of the descending route ^ - libérer cette quantité de matière à proximité de la paroi du four dans le parcours descendant à partir du moment où - release this quantity of material near the wall of the furnace in the descending path from the moment when <EMI ID=52.1> <EMI ID = 52.1> <EMI ID=53.1> <EMI ID=54.1> <EMI ID = 53.1> <EMI ID = 54.1> _ deuxième talus de matière solide,, dans le parcours descen- _ second slope of solid material, in the downhill course <EMI ID=55.1> <EMI ID = 55.1> <EMI ID=56.1> <EMI ID = 56.1> te à : te to: - former un premier talus de matière solide, déporté dans le sens de rotation du four suivant le parcours ascendant, <EMI ID=57.1> - form a first slope of solid material, offset in the direction of rotation of the furnace following the ascending path, <EMI ID = 57.1> <EMI ID=58.1> <EMI ID = 58.1> -.. - prélever dans ce ramier talus une certaine quantité de <EMI ID=59.1> <EMI ID=60.1> - .. - take a certain quantity of <EMI ID = 59.1> <EMI ID = 60.1> from this ramier slope <EMI ID=61.1> <EMI ID=62.1> <EMI ID = 61.1> <EMI ID = 62.1> <EMI ID=63.1> <EMI ID=64.1> <EMI ID=65.1> <EMI ID = 63.1> <EMI ID = 64.1> <EMI ID = 65.1> <EMI ID=66.1> <EMI ID = 66.1> <EMI ID=67.1> <EMI ID = 67.1> <EMI ID=68.1> <EMI ID = 68.1> <EMI ID=69.1> <EMI ID=70.1> <EMI ID = 69.1> <EMI ID = 70.1> cours descendant de la paroi du four, dont la surface est descending course of the furnace wall, the surface of which is en contact direct avec le gaz. in direct contact with gas. <EMI ID=71.1> <EMI ID = 71.1> libération de la matière solide, entraînée sur une trajectoire proche de; et substantiellement parallèle à celle de la paroi du four, commence alors que ladite matière solide a parcouru un arc release of solid matter, entrained on a path close to; and substantially parallel to that of the furnace wall, begins when said solid material has passed through an arc <EMI ID=72.1> <EMI ID = 72.1> four, en parcours descendant. oven, descending route. <EMI ID=73.1> <EMI ID = 73.1> tion de la matière solide commence alors que ladite matière solide a parcouru un arc de cercle de 60[deg.], par rapport au plan tion of solid matter begins when said solid matter has traversed an arc of a circle of 60 [deg.], with respect to the plane <EMI ID=74.1> <EMI ID = 74.1> <EMI ID=75.1> <EMI ID = 75.1> <EMI ID=76.1> <EMI ID = 76.1> interne duquel est monté au moins un godet pourvu d'une ouver- of which is mounted at least one bucket provided with an opening <EMI ID=77.1> <EMI ID = 77.1> partie inférieure du four, une certaine quantité de !ratière sol ide, le godet étant agencé pour retenir cette quantité de matière solide dans la partie du parcours ascendant au-delà du talus et dans une partie du parcours descendant,et la libérer dans le lower part of the furnace, a certain amount of solid dobby, the bucket being arranged to retain this amount of solid matter in the part of the upward path beyond the slope and in a part of the downward path, and release it into the <EMI ID=78.1> <EMI ID = 78.1> tière est suffisamment écartée du centre du four. the center of the oven is far enough apart. 6. Dispositif suivant 5, caractérisé en ce que le go- : det est solidaire, de la paroi rotative du four et comprend, l'avant étant considéré dans le sens de rotation de ladite paroi, 6. Device according to 5, characterized in that the go-: det is integral with the rotating wall of the furnace and comprises, the front being considered in the direction of rotation of said wall, <EMI ID=79.1> <EMI ID = 79.1> cente à la paroi du four, une paroi arrière aboutissant à la cente to the wall of the furnace, a rear wall ending in the <EMI ID=80.1> <EMI ID = 80.1> <EMI ID=81.1> <EMI ID = 81.1> arrière, et des parois latérales fermant les cotés du godet pour rear, and side walls closing the sides of the bucket for <EMI ID=82.1> <EMI ID = 82.1> <EMI ID=83.1> <EMI ID=84.1> <EMI ID = 83.1> <EMI ID = 84.1> <EMI ID=85.1> <EMI ID = 85.1> <EMI ID=86.1> <EMI ID = 86.1> <EMI ID=87.1> <EMI ID = 87.1> arrière, supérieure et avant du godet suite à un pivotement de ce dernier en liaison avec la rotation du four, et un débordement de la. matière prélevée au travers de l'ouverture dès que le godet a atteint une inclinaison correspondant à une position angulaire du godet à au moins 45[deg.] au-delà du plan médian verti- cal du four, dans le trajet de descente.. rear, upper and front of the bucket following a pivoting of the latter in connection with the rotation of the oven, and an overflow of the. material taken through the opening as soon as the bucket has reached an inclination corresponding to an angular position of the bucket at least 45 [deg.] beyond the vertical midplane of the furnace in the descent path. 7. Dispositif suivant 6, caractérisé en ce que l'espace intérieur du godet et l'ouverture sont agencés pour que le débordement de matière commence lorsque le godet a atteint une inclinaison correspondant à une position angulaire à 60[deg.] au-delà du plan médian vertical du four, dans le trajet de descente. 7. Device according to 6, characterized in that the interior space of the bucket and the opening are arranged so that the overflow of material begins when the bucket has reached an inclination corresponding to an angular position at 60 [deg.] Beyond of the vertical median plane of the furnace, in the descent path. 8. Dispositif suivant l'une quelconque des revendications 5 à 7, caractérisé en ce que le four comprend une série de godets répartis à des intervalles angulaires égaux sur sa paroi interne. 8. Device according to any one of claims 5 to 7, characterized in that the oven comprises a series of cups distributed at equal angular intervals on its internal wall. 9. Dispositif suivant l' une quelconque des revendications 6 à 8, caractérisé en ce que la paroi avant du -odet est inclinée dans le sens de rotation pour constituer entonnoir visà-vis de l'ouverture lors du passage dans le talus, alors que la paroi arrière est inclinée en sens inverse du sens de rotation pour constituer d'abord palette brasseuse lors du passage du godet dans le talus, et ensuite organe de retenue de la matière en chute lors du débordement de la matière au travers de l'ouverture du godet suivant immédiatement. 9. Device according to any one of claims 6 to 8, characterized in that the front wall of the -odet is inclined in the direction of rotation to form a funnel vis-à-vis the opening when passing through the slope, while the rear wall is inclined in the opposite direction to the direction of rotation to first constitute a stirring pallet when the bucket passes through the embankment, and then a member for retaining the falling material when the material overflows through the opening of the next bucket immediately. 10. Dispositif suivant l'une quelconque des revendications 6 à 9, caractérisé en ce que la paroi avant est doublée ; 10. Device according to any one of claims 6 to 9, characterized in that the front wall is lined; à l'intérieur du godet d'une paroi disposée en substance radialement par rapport au four pour permettre un vidage complet du godet avant sa pénétration dans le talus. inside the bucket of a wall disposed substantially radially with respect to the furnace to allow complete emptying of the bucket before it enters the slope. 11. Dispositif suivant l'une quelconque des revendi- 11. Device according to any one of the claims - cations 6 à 10, caractérisé en ce que les parois latérales s'élément au-delà de la. paroi arrière pour constituer renforts, . ainsi que retenue latérale de la matière en chute reçue sur la, <EMI ID=88.1> <EMI ID=89.1> - cations 6 to 10, characterized in that the side walls are located beyond the. rear wall to constitute reinforcements,. as well as lateral retention of the falling material received on the, <EMI ID = 88.1> <EMI ID = 89.1>
BE180935A 1977-09-15 1977-09-15 METHOD AND DEVICE FOR INCREASING THE CALORIFIC EXCHANGES BETWEEN SOLID MATERIAL AND GAS, IN A ROTARY CEMENT OVEN BE858730A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE180935A BE858730A (en) 1977-09-15 1977-09-15 METHOD AND DEVICE FOR INCREASING THE CALORIFIC EXCHANGES BETWEEN SOLID MATERIAL AND GAS, IN A ROTARY CEMENT OVEN
DE19782828482 DE2828482C3 (en) 1977-09-15 1978-06-29 Rotary cement kiln

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE858730 1977-09-15
BE180935A BE858730A (en) 1977-09-15 1977-09-15 METHOD AND DEVICE FOR INCREASING THE CALORIFIC EXCHANGES BETWEEN SOLID MATERIAL AND GAS, IN A ROTARY CEMENT OVEN

Publications (1)

Publication Number Publication Date
BE858730A true BE858730A (en) 1978-01-02

Family

ID=25650272

Family Applications (1)

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BE180935A BE858730A (en) 1977-09-15 1977-09-15 METHOD AND DEVICE FOR INCREASING THE CALORIFIC EXCHANGES BETWEEN SOLID MATERIAL AND GAS, IN A ROTARY CEMENT OVEN

Country Status (1)

Country Link
BE (1) BE858730A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0327650A1 (en) * 1988-01-30 1989-08-16 WIBAU Maschinen GmbH &amp; Co. KG Apparatus to clear the flame area in a rotary drum furnace using direct heating, and arrangement and construction of the shovels
EP0340462A1 (en) * 1988-05-04 1989-11-08 Deutag Asphalttechnik GmbH Rotating-drum furnace for drying or mixing freely flowing materials
EP0367956A1 (en) * 1988-11-05 1990-05-16 Klöckner-Humboldt-Deutz Aktiengesellschaft Lifter for cooling drums, rotary drum furnaces or similar devices
DE10240249B3 (en) * 2002-08-31 2004-02-26 Enerco Bv System for drying and processing pourable mineral material comprises a rotating drum with built-in components, a combustion device, a ventilator, a venturi assembly, and a bypass for conveying air

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0327650A1 (en) * 1988-01-30 1989-08-16 WIBAU Maschinen GmbH &amp; Co. KG Apparatus to clear the flame area in a rotary drum furnace using direct heating, and arrangement and construction of the shovels
EP0340462A1 (en) * 1988-05-04 1989-11-08 Deutag Asphalttechnik GmbH Rotating-drum furnace for drying or mixing freely flowing materials
EP0367956A1 (en) * 1988-11-05 1990-05-16 Klöckner-Humboldt-Deutz Aktiengesellschaft Lifter for cooling drums, rotary drum furnaces or similar devices
DE10240249B3 (en) * 2002-08-31 2004-02-26 Enerco Bv System for drying and processing pourable mineral material comprises a rotating drum with built-in components, a combustion device, a ventilator, a venturi assembly, and a bypass for conveying air
US6823607B2 (en) 2002-08-31 2004-11-30 Enerco Bv Plant for the drying and treatment of pourable mineral material

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Owner name: CIMENTS D OBOURG S.A.

Effective date: 19970915