FR2528159A1 - METHOD AND APPARATUS FOR DRYING POWDERY MATERIALS IN GENERAL - Google Patents
METHOD AND APPARATUS FOR DRYING POWDERY MATERIALS IN GENERAL Download PDFInfo
- Publication number
- FR2528159A1 FR2528159A1 FR8308613A FR8308613A FR2528159A1 FR 2528159 A1 FR2528159 A1 FR 2528159A1 FR 8308613 A FR8308613 A FR 8308613A FR 8308613 A FR8308613 A FR 8308613A FR 2528159 A1 FR2528159 A1 FR 2528159A1
- Authority
- FR
- France
- Prior art keywords
- dried
- air
- screen
- axis
- pulverulent
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
- F26B3/092—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating
- F26B3/0926—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating by pneumatic means, e.g. spouted beds
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
APPAREIL POUR LA MISE EN OEUVRE DU PROCEDE DE SECHAGE DE MATIERES PULVERULENTES COMPORTANT UN GENERATEUR D'AIR COMPRIME ENVOYANT UN COURANT D'AIR A TRAVERS UN TAMIS E SUPPORTANT LA MATIERE A SECHER; DES MOYENS 6, 9 PERMETTANT DE COMMUNIQUER UN MOUVEMENT ASCENDANT HELICOIDAL A LA MATIERE PULVERULENTE ENTRAINEE DANS L'AIR; DES MOYENS DE DEVIATION 28, 30 CONVENABLEMENT ESPACES DES PREMIERS MOYENS DEVIENT DE 180 EN DIRECTION CENTRIPETE LE COURANT DE MATIERE PULVERULENTE, ET DES MOYENS 24, 28 PLACES PRATIQUEMENT SUR L'AXE DU COURANT D'AIR HELICOIDAL PERMETTANT DE RECUEILLIR LA MATIERE DESIREE, DE LA RETIRER DU COURANT ET DE L'AMENER A UN RESERVOIR COLLECTEUR.APPARATUS FOR IMPLEMENTING THE PROCESS FOR DRYING PULVERULENT MATERIALS INCLUDING A COMPRESSED AIR GENERATOR SENDING A CURRENT OF AIR THROUGH A SIEVE SUPPORTING THE MATERIAL TO BE DRYED; MEANS 6, 9 ALLOWING TO COMMUNICATE AN ASCENDING HELICOIDAL MOVEMENT TO PULVERULENT MATTER ENTRANTED IN THE AIR; OF THE DEVIATION MEANS 28, 30 SUITABLY SPACES OF THE FIRST MEANS BECOMES 180 IN CENTRIPEAL DIRECTION THE PULVERULENT MATERIAL CURRENT, AND OF THE MEANS 24, 28 PLACES PRACTICALLY ON THE AXIS OF THE HELICAL AIR CURRENT ALLOWING TO COLLECT THE DESIRED MATERIAL REMOVE IT FROM THE POWER AND TAKE IT TO A COLLECTOR TANK.
Description
L invention concerne un procédé pour le sdchageThe invention relates to a method for drying
de matières pulvérulentes en général et l'équipement appro- of powdery materials in general and the appropriate equipment
prié à la mise en oeuvre de ce procédé On connait depuis requested to implement this process We have known since
longtemps des séchoirs de type continu pour matières pulvé- continuous dryers for pulverized materials
rulentes en couche fluidisée, ces séchoirs, en tirant par- ti de la vitesse de l'air de séchage et de la diminution de poids des différentes particules de poussière par suite de perte d'humidité pendant le traitement, transportent de façon continue la matière séchée vers l'extérieur pour qu' Rulents in a fluidized layer, these dryers, taking advantage of the speed of the drying air and the reduction in weight of the different dust particles due to loss of humidity during processing, continuously transport the material dried outwards so that
elle soit ensuite recueillie.it is then collected.
Toutefois, le rendement de ce procédé est très faible et il ne permet pas de choisir différentes grosseurs However, the yield of this process is very low and it does not allow to choose different sizes
de particules de la matière séchée. particles of the dried matter.
Le but de l'invention est de fournir un procé- The object of the invention is to provide a process
dé de séchage pour matières pulvérulentes incluses dans une couche fluidisée et de fournir un appareil permettant drying die for pulverulent materials included in a fluidized layer and to provide an apparatus allowing
à la fois de sécher efficacement le produit et de le re- both to effectively dry the product and to re-
cueillir selon la finesse des particules, ainsi que de ré- pick according to the fineness of the particles, as well as
cupérer et de rejeter les parties plus lourdes agglomérées. to collect and reject the heavier agglomerated parts.
A la différence des séchoirs o l'air passe en Unlike dryers where the air flows
direction verticale ou avec une faible turbulence ascension- vertical direction or with low ascent turbulence-
nelle à travers le tamis supportant la couche fluidisée de matière, dans le procédé selon l'invention on communique through the sieve supporting the fluidized layer of material, in the process according to the invention we communicate
un mouvement tourbillonnant au courant d'air qui transpor- a swirling movement of the air stream which carries
te la matière avec un mouvement hélicoïdal ascendant vers la zone périphérique de la chambre de séchage, située au dessus du tamis De cette manière, la matière reste plus the material with an upward helical movement towards the peripheral zone of the drying chamber, located above the sieve In this way, the material remains more
longtemps en contact avec l'air ce qui assure un degré op- a long time in contact with the air which ensures an op-
timal de séchage et en retombant à contre-courant vers l'axe de l'enveloppe, la matière peut être recueillie et drying and falling against the current towards the axis of the envelope, the material can be collected and
aspirée par des moyens appropriés pour être ensuite éva- sucked up by appropriate means and then evacuated
cuée à l'extérieur.baked outside.
Selon une variante, la chambre de séchage peut, According to a variant, the drying chamber can,
ou bien avoir pratiquement le même diamètre que la cham- or have practically the same diameter as the cham-
bre située en dessous o se forme le courant hélicoïdal d'air soufflé, ou bien être caractérisée par une enveloppe de plus grand diamètre pour améliorer encore le résultat comme on l'expliquera ci-après Une mobilité appropriée des moyens collecteurs en direction verticale donne la bre located below where the helical flow of blown air is formed, or else be characterized by an envelope of larger diameter to further improve the result as will be explained below. Appropriate mobility of the collecting means in vertical direction gives the
possibilité de choisir la matière selon différentes gros- possibility to choose the material according to different wholesale-
seurs de particulestandis que pour compléter l'installa- tion, des moyens auxiliaires sont prévus pour mélanger la sors of particulars while to complete the installation, auxiliary means are provided for mixing the
couche fluidisée et pour broyer et/ou recueillir les ag- fluidized layer and for grinding and / or collecting the ag-
glomérations de matière de manière à améliorer le rende- glomerations of matter so as to improve the rendering
ment du procédé.ment of the process.
On décrira maintenant l'invention à propos des The invention will now be described with regard to
dessins annexés qui illustrent à titre d'exemple l'équi- attached drawings which illustrate by way of example the equi-
pement servant à sécher des matières chargées de poussière en général Sur les dessins: pement used to dry dust-laden materials in general On the drawings:
la figure 1 est une coupe schématique de l'é- Figure 1 is a schematic sectional view of the
quipement de séchage selon l'invention, drying equipment according to the invention,
la figure 2 montre une variante du mode d'exé- Figure 2 shows a variant of the mode of exe
cution de la chambre de séchage selon la figure 1, les figures 5 et 4 montrent, respectivement en coupe et en plan, le tamis de l'appareil représenté par cution of the drying chamber according to Figure 1, Figures 5 and 4 show, respectively in section and in plan, the screen of the apparatus represented by
les figures 1 et 2.Figures 1 and 2.
Sur la figure 1, la lettre 1 désigne l'appareil qui est formé d'une enveloppe cylindrique 2 divisée en In FIG. 1, the letter 1 designates the device which is formed by a cylindrical envelope 2 divided into
deux chambres pneumatiques séparées par un tamis E suppor- two pneumatic chambers separated by a sieve E support-
tant la matière à sécher qui est introduite par une tré- both the material to be dried which is introduced through a
mie 4.crumb 4.
La chambre inférieure C est munie d'un fond ou diaphragme conique 6 et un ventilateurs 8 envoie un courant The lower chamber C is provided with a conical bottom or diaphragm 6 and a fans 8 sends a current
d'air dars la chambre C par une buse 9 dirigée tangentiel- of air in chamber C via a nozzle 9 directed tangentially-
lement par rapport à la paroi intérieure de la chambre. relative to the interior wall of the chamber.
Au dessus du tamis E, un bras horizontal 10 tourne sur un arbre 12 entralné par un train réducteur 14 et il est muni de moyens tels que des pales 16 conçues pour retirer et déverser à l'extérieur, par le dispositif 18, les particules les plus lourdes et le refus qui reste sur la surface de la couche fluidisée, et d'autres moyens, tels que des rouleaux ou des racles 20, pour broyer les Above the screen E, a horizontal arm 10 rotates on a shaft 12 entrainé by a reduction gear 14 and it is provided with means such as blades 16 designed to remove and discharge outside, by the device 18, the particles the heavier and the refusal which remains on the surface of the fluidized layer, and other means, such as rollers or doctor blades 20, for grinding the
matières agglomérées déposées sur la surface du tamis. agglomerated matter deposited on the surface of the sieve.
Le tuyau d'aspiration 22 est situé sur l'axe The suction pipe 22 is located on the axis
de la chambre de séchage B, un manchon télescopique 24. from the drying chamber B, a telescopic sleeve 24.
conçu pour se déplacer verticalement au moyen d'une crémail- designed to move vertically by means of a rack
lère 26 actionnée par un pignon entraîné de l'extérieur par 1st 26 actuated by a pinion driven from the outside by
un moteur 27, est associé à ce tuyau. a motor 27 is associated with this pipe.
Le manchon 24 est muni d'une calotte tronconi- The sleeve 24 is provided with a frustoconical cap
que 28 associée à son tour à un déflecteur 30 dont l'ouver- 28 associated in turn with a deflector 30, the opening of which
ture est convenablement espacée de celle de la calotte 28 ture is suitably spaced from that of cap 28
par des moyens réglables 32, grâce auxquels on a la possi- by adjustable means 32, thanks to which there is the possibility
bilité de faire varier la distance entre les bords de ces éléments. Le tuyau d'aspiration 22 est relié au cyclone 52 et la sortie de ce dernier est reliée à son tour à un bility to vary the distance between the edges of these elements. The suction pipe 22 is connected to the cyclone 52 and the outlet of the latter is in turn connected to a
filtre à sacs 54 pour recueillir et séparer la matière pul- bag filter 54 to collect and separate the pulp material
vérulente entratnée dans le courant d'air provenant du cy- verulent entrainée in the air flow coming from the cy-
clone et non retenue par ce dernier Les dispositifs 52 et 54 peuvent être utilisés simultanément ou séparément et clone and not retained by the latter Devices 52 and 54 can be used simultaneously or separately and
cela dépend des nécessités de la matière traitée. it depends on the needs of the material treated.
Sur les figures 3 et 4, le tamis E, de type connu, est formé d'un jeu de lamelles concentriques a, b; In FIGS. 3 and 4, the screen E, of known type, is formed by a set of concentric strips a, b;
présentant toutes identiquement un tronçon plan 40 et dis- all identically having a flat section 40 and dis-
posées de telle sorte que le bord replié vers le haut de chacune chevauche le bord opposé 44 replié vers le bas De cette manière, la couche humide de matière est supportée par le tamis et l'air insufflé dans la chambre C passe à travers les interstices formés par les bords des paires de lamelles et coopère de manière à faire prendre au courant d'air le mouvement rotatif désiré La partie centrale 50 laid in such a way that the folded up edge of each overlaps the opposite folded down edge 44 In this way, the wet layer of material is supported by the screen and the air blown into the chamber C passes through the interstices formed by the edges of the pairs of lamellae and cooperates so as to cause the current of air to take the desired rotary movement The central part 50
du tamis (voir aussi figure 1) est pleine et donc imper- sieve (see also figure 1) is full and therefore imper-
méable au courant d'air sur une surface circulaire dont le diamètre coïncide pratiquement avec celui du déflecteur 50 de manière à communiquer le mouvement ascendant voulu à air flowable on a circular surface whose diameter practically coincides with that of the deflector 50 so as to communicate the desired upward movement to
l'air de la chambre B, suivant une trajectoire hélico Tda- the air in room B, following a helical trajectory Tda-
le dans la zone périphérique de la chambre. the in the peripheral area of the room.
D'après ce qui précède, il est évident que les From the above, it is evident that the
buts de l'invention, consistant à donner un grand rende- aims of the invention, consisting in giving a large return
ment à l'installation de séchage, sont pleinement atteints to the drying plant, are fully achieved
étant donné que le principe de communiquer à l'air un mou- since the principle of communicating a
vement tourbillornnant hélicoïdal cause un allongement du parcours suivi par les particules entratnées dans le courant d'air et par conséquent une augmentation du temps actif Helical swirling causes an increase in the path followed by particles entrained in the air stream and therefore an increase in active time
de séchage.drying.
Une variante avantageuse, qui permet d'augmen- An advantageous variant, which makes it possible to increase
ter encore le temps de séchage et donc le rendement total, further reduce the drying time and therefore the total yield,
est représentée par la figure 2.is represented by figure 2.
Selon cette variante, qui diffère de l'instal- According to this variant, which differs from the instal-
lation représentée sur la figure 1 o le diamètre de la lation shown in Figure 1 o the diameter of the
chambre B est égal à celui de la chambre C (et par consé- room B is equal to that of room C (and therefore
quent du tamis E), le diamètre de la chambre B, en sa par- quent of the sieve E), the diameter of the chamber B, in its part
tie supérieure, est même double du précédent, étant donné que cette partie est reliée au niveau du plan du tamis upper tie, is even double the previous one, since this part is connected at the level of the sieve plane
par un raccordement tronconique renversé 3 conçu pour as- by an inverted frustoconical connection 3 designed to
surer un écoulement cyclonique inverse de l'air de sécha- a reverse cyclonic flow of the drying air
ge.ge.
L'air qui sort de la couche de matière pulvé- The air which leaves the layer of pulverized material
rulente, en se dilatant, ralentit son mouvement rotatif ascndant, ce qui augmente encore le temps de contact avec la matière entralnée, tandis que le principe de recueillir rulente, while expanding, slows down its upward rotary movement, which further increases the time of contact with entralné material, while the principle of collecting
les particules sèches dans la zone centrale de l'envelop- dry particles in the central area of the envelope
pe B reste incharngé-pe B remains uncharged-
On peut modifier l'invention, par exemple en ce qui concerne la grandeur totale de l'installation et en ce qui concerne ses parties, en fonction du type de The invention can be modified, for example as regards the total size of the installation and as regards its parts, depending on the type of
poussière à traiter et du matériau utilisé pour la cons- dust to be treated and the material used for the
truction, mais sans s'écarter de l'esprit ni du cadre de l'invention. truction, but without departing from the spirit or the scope of the invention.
Claims (8)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT21689/82A IT1151577B (en) | 1982-06-03 | 1982-06-03 | PROCEDURE AND RELATED EQUIPMENT FOR DRYING POWDERED MATERIALS IN GENERAL |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2528159A1 true FR2528159A1 (en) | 1983-12-09 |
FR2528159B1 FR2528159B1 (en) | 1988-02-26 |
Family
ID=11185425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8308613A Expired FR2528159B1 (en) | 1982-06-03 | 1983-05-25 | METHOD AND APPARATUS FOR DRYING POWDERY MATERIALS IN GENERAL |
Country Status (7)
Country | Link |
---|---|
CH (1) | CH654904A5 (en) |
DE (1) | DE3318313C2 (en) |
DK (1) | DK157259C (en) |
ES (1) | ES8404044A1 (en) |
FR (1) | FR2528159B1 (en) |
GB (1) | GB2121153A (en) |
IT (1) | IT1151577B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59196726A (en) * | 1983-04-19 | 1984-11-08 | Okawara Mfg Co Ltd | Continuous fluidized layer type granulating apparatus |
GB2177616B (en) * | 1985-07-09 | 1988-07-06 | Smidth & Co As F L | Gas suspension reactor |
GB8530020D0 (en) * | 1985-12-05 | 1986-01-15 | British American Tobacco Co | Treatment of particulate materials |
DE3613362A1 (en) * | 1986-04-19 | 1987-10-29 | Orth Gmbh H | FLIGHT LAYER DRYER |
DK9891A (en) * | 1991-01-21 | 1992-09-15 | Techdania I S V Sven T Aaen Og | PROCEDURE FOR CONTINUOUS DISINTEGRATION AND / OR DRYING OF PASTA, SLAM, PRESSURE CAKE, FILTER CAKE OR LIKE, ISSUE FIBROSICAL MATERIALS AND APPARATUS FOR EXERCISING THE PROCEDURE |
EP1956326B1 (en) | 2007-02-09 | 2010-04-14 | Braunschweigische Maschinenbauanstalt AG | Device for removing fluids and/or solids |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE544308A (en) * | ||||
US2522704A (en) * | 1939-12-08 | 1950-09-19 | Laval Jacques Hjaimar De | Method and apparatus to treat material in form of pieces or powder with gases |
GB981750A (en) * | 1962-02-03 | 1965-01-27 | Bayer Ag | Apparatus for drying particles carried in a stream of gas |
US3544089A (en) * | 1967-07-12 | 1970-12-01 | Pierre Ledent | Pneumatic elevators for lifting granular solids |
US3711962A (en) * | 1970-12-15 | 1973-01-23 | Okawara Mfg | Fluidized drying apparatus |
US3795058A (en) * | 1971-06-06 | 1974-03-05 | Struthers Scient And Int Corp | Grid for fluidized bed apparatus |
DE2555917A1 (en) * | 1975-04-23 | 1976-11-04 | Thaelmann Schwermaschbau Veb | Fluid bed dryer for proteins - incorporating spray for aqueous feed with differential air velocity across bed |
FR2317611A1 (en) * | 1975-07-09 | 1977-02-04 | Lejeune Bertrand | Drier-extractor for particulate material - comprising closed vessel enclosing perforated wall |
DE2904077A1 (en) * | 1978-05-16 | 1979-11-29 | Thaelmann Schwermaschbau Veb | Removal of solvent from particulate materials - using steam heated screw feeder discharging into fluid bed with spiral movement fluidised by superheated solvent vapour |
WO1982001061A1 (en) * | 1980-09-12 | 1982-04-01 | Processes Ltd Jetsonic | Pulse combustion fluidizing dryer |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US236281A (en) * | 1881-01-04 | Trand | ||
DE1642917A1 (en) * | 1967-01-30 | 1971-05-19 | Ashizawa Iron Works Co Ltd | Process for drying, heating, cooling or the like of a substance in powder, granulate or similar form as well as a device suitable for carrying out such a process |
CH508828A (en) * | 1970-07-08 | 1971-06-15 | Hirmann Georg | Method for closing bores in workpieces and plugs for carrying out the method |
FR2171667A5 (en) * | 1972-02-04 | 1973-09-21 | Mark Andre |
-
1982
- 1982-06-03 IT IT21689/82A patent/IT1151577B/en active
-
1983
- 1983-05-16 GB GB08313500A patent/GB2121153A/en not_active Withdrawn
- 1983-05-17 ES ES522466A patent/ES8404044A1/en not_active Expired
- 1983-05-19 DE DE3318313A patent/DE3318313C2/en not_active Expired
- 1983-05-25 FR FR8308613A patent/FR2528159B1/en not_active Expired
- 1983-06-01 CH CH3003/83A patent/CH654904A5/en not_active IP Right Cessation
- 1983-06-02 DK DK250183A patent/DK157259C/en not_active IP Right Cessation
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE544308A (en) * | ||||
US2522704A (en) * | 1939-12-08 | 1950-09-19 | Laval Jacques Hjaimar De | Method and apparatus to treat material in form of pieces or powder with gases |
GB981750A (en) * | 1962-02-03 | 1965-01-27 | Bayer Ag | Apparatus for drying particles carried in a stream of gas |
US3544089A (en) * | 1967-07-12 | 1970-12-01 | Pierre Ledent | Pneumatic elevators for lifting granular solids |
US3711962A (en) * | 1970-12-15 | 1973-01-23 | Okawara Mfg | Fluidized drying apparatus |
US3795058A (en) * | 1971-06-06 | 1974-03-05 | Struthers Scient And Int Corp | Grid for fluidized bed apparatus |
DE2555917A1 (en) * | 1975-04-23 | 1976-11-04 | Thaelmann Schwermaschbau Veb | Fluid bed dryer for proteins - incorporating spray for aqueous feed with differential air velocity across bed |
FR2317611A1 (en) * | 1975-07-09 | 1977-02-04 | Lejeune Bertrand | Drier-extractor for particulate material - comprising closed vessel enclosing perforated wall |
DE2904077A1 (en) * | 1978-05-16 | 1979-11-29 | Thaelmann Schwermaschbau Veb | Removal of solvent from particulate materials - using steam heated screw feeder discharging into fluid bed with spiral movement fluidised by superheated solvent vapour |
WO1982001061A1 (en) * | 1980-09-12 | 1982-04-01 | Processes Ltd Jetsonic | Pulse combustion fluidizing dryer |
Also Published As
Publication number | Publication date |
---|---|
DE3318313C2 (en) | 1986-05-22 |
GB8313500D0 (en) | 1983-06-22 |
CH654904A5 (en) | 1986-03-14 |
IT1151577B (en) | 1986-12-24 |
DK157259C (en) | 1990-04-30 |
DE3318313A1 (en) | 1983-12-08 |
ES522466A0 (en) | 1984-05-01 |
DK250183D0 (en) | 1983-06-02 |
ES8404044A1 (en) | 1984-05-01 |
FR2528159B1 (en) | 1988-02-26 |
IT8221689A0 (en) | 1982-06-03 |
DK157259B (en) | 1989-11-27 |
DK250183A (en) | 1983-12-04 |
GB2121153A (en) | 1983-12-14 |
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ST | Notification of lapse |