EP3992561B1 - Sécheur éclair pour le séchage d'un produit et procédé de séchage d'un produit dans un sécheur éclair - Google Patents

Sécheur éclair pour le séchage d'un produit et procédé de séchage d'un produit dans un sécheur éclair Download PDF

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Publication number
EP3992561B1
EP3992561B1 EP20204151.3A EP20204151A EP3992561B1 EP 3992561 B1 EP3992561 B1 EP 3992561B1 EP 20204151 A EP20204151 A EP 20204151A EP 3992561 B1 EP3992561 B1 EP 3992561B1
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EP
European Patent Office
Prior art keywords
chamber
product
disc
flash dryer
lower section
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.)
Active
Application number
EP20204151.3A
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German (de)
English (en)
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EP3992561A1 (fr
EP3992561C0 (fr
Inventor
Richard KLANG
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.)
G Larsson Starch Technology AB
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G Larsson Starch Technology AB
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
Priority to EP20204151.3A priority Critical patent/EP3992561B1/fr
Application filed by G Larsson Starch Technology AB filed Critical G Larsson Starch Technology AB
Priority to HUE20204151A priority patent/HUE072630T2/hu
Priority to ES20204151T priority patent/ES3040257T3/es
Priority to PL20204151.3T priority patent/PL3992561T3/pl
Priority to PCT/EP2021/079664 priority patent/WO2022090216A1/fr
Priority to CA3196433A priority patent/CA3196433A1/fr
Publication of EP3992561A1 publication Critical patent/EP3992561A1/fr
Application granted granted Critical
Publication of EP3992561B1 publication Critical patent/EP3992561B1/fr
Publication of EP3992561C0 publication Critical patent/EP3992561C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
    • F26B17/101—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis
    • F26B17/103—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis with specific material feeding arrangements, e.g. combined with disintegrating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/08—Parts thereof
    • F26B25/10—Floors, roofs, or bottoms; False bottoms

Definitions

  • the invention relates to a flash dryer for drying a product and a method for drying a product in a flash dryer or an agitated fluid bed dryer.
  • a problem with this type of conventional flash dryers is that the rotating disc in the bottom of the chamber may deform due to the heat from the air introduced via the air inlets. This will in turn lead to an undesired engagement between the disc and the inner wall of the chamber thereby decreasing the life time of the disc.
  • a particular object is to provide an improved flash dryer which allows for a more secure and effective drying process of a product.
  • the new and inventive shape of the disc eliminates the need to rotate the disc in order to force the product towards the gap and the air flowing therefrom.
  • the risk of the disc engaging with the inner wall of the chamber due to heat expansion is also eliminated, which will prolong the life time of the disc and the chamber.
  • the specially designed shovel arm will help distributing the product in the lower portion of the chamber and push the same towards gap and the air flowing therefrom.
  • the shovel arm is preferably shaped to correspond with the upper surface of the disc, i.e. it may have an inclined or curved shape towards the disc.
  • the secondary air inlet may comprise a plurality of inner air inlets providing air into the chamber, the inner air inlets being arranged along a periphery of the chamber.
  • the disc may comprise protrusions along its outer periphery adapted to direct air from the primary air inlet to enter the chamber via the gap in a substantially vertical direction.
  • the outer edge of the disc may be at least partly rounded.
  • the plurality of disintegrator elements may be vertically aligned with the location of the product inlet.
  • Each one of the plurality of disintegrator elements may comprise a grinding edge thereof such that the product is disintegrated and/or grinded between the grinding edge and the inner wall of the chamber.
  • the shovel arm may comprise a plurality of recesses in a bottom section thereof, allowing parts of product located on the disc to escape therethrough.
  • the shovel arm may comprise a wing portion attached to an outer edge thereof, the wing portion being vertically aligned with the product outlet such that the product fed into the chamber is cut into pieces when the shovel arm is rotating therein.
  • the chamber may comprise protrusions arranged at a distance from each other along a periphery of the inner wall of the cylinder.
  • Each one of the protrusions may comprise an exchangeable cutting edge.
  • the flash dryer may further comprise a product conveyer connected to the product inlet.
  • the objects are achieved in full, or at least in part, by a method for drying a product in a flash dryer.
  • the method comprises introducing the product into a chamber of the flash dryer via a product inlet located in a lower section of the chamber onto a disc having a domed shape and being fixedly arranged in the lower section of the chamber below the product inlet, wherein a thickness of the disc is decreasing radially from a mid-section of the disc towards the outer edge of the disc, rotating a shovel arm in the lower section of the chamber above the disc to distribute the product in the lower section of the chamber, rotating a plurality of rotatable disintegrator elements in the lower section of the chamber above the disc and the shovel arm to disintegrate the product, providing air into the chamber from a primary air inlet arranged below the chamber via a gap between an outer edge of the disc and an inner wall of the chamber to lift and dry the product, providing air into the chamber from a secondary air inlet arranged in the lower section of the chamber above the plurality
  • Fig. 1 and 2 illustrate an exemplary embodiment of a flash dryer 1 for drying a product 2.
  • the flash dryer 1 comprises a chamber 3 having a product inlet 4 and a product outlet 5.
  • the product inlet 4 is located in a lower section of the chamber 3 and the product outlet 5 is located in a upper section of the chamber 3.
  • a domed shaped disc 6 is fixedly arranged in a bottom 7 of the chamber 3 below the product inlet 4.
  • the disc 6 has a diameter that is slightly smaller than an inner diameter of an inner wall 8 in the lower section of the chamber 3, such that a gap 9 is created between an outer edge 10 of the disc 6 and the inner wall 8 of the chamber 3.
  • a thickness of the disc 6 is decreasing radially from a mid-section 11 of the disc 6 towards the outer edge 10 of the disc 6.
  • the outer edge 10 of the disc 6 is preferably at least partly rounded for manufacturing purposes and structural strength. The rounded shape of the outer edge 10 of the disc 6 makes it possible to avoid welded corner joints which highly contributes to an increase structural strength of the disc 6.
  • the radius of the rounded outer edge is preferably 50 mm or more.
  • the disc 6 can have a domed shape or for example straight upper surfaces where the thickness of the disc 6 is decreasing radially from a mid-section 11 of the disc 6 towards the outer edge 10 of the disc 6.
  • the disc 5 has a domed shape with a diameter of approximately 3200 mm, maximum height - at the mid-section 11 - of approximately 600 mm, and a minimum height - at the outer edge 10 - of approximately 300 mm.
  • a primary air inlet 12 is arranged below the chamber 3 and arranged to provide air into the chamber 3 via the gap 9.
  • the disc 6 comprises protrusions 25 along its outer periphery.
  • the protrusions 25 are illustrated in Fig. 3 and are formed to direct air from the primary air inlet 12 to enter the chamber 3 via the gap 9 in a substantially vertical direction.
  • the flash dryer 1 further comprises a drive unit 13 arranged below the chamber 3 which has a drive shaft 14 extending through a hole 15 in the mid-section 11 of the disc 6 into the lower section of the chamber 3.
  • a rotatable shovel arm 16 is connected to the drive shaft 14 directly above the disc 6 in the lower section of the chamber 3.
  • the shovel arm 16 rotates above the disc 6 and is used to push the product 2 towards the gap 9 and the air flowing into the chamber 3 therefrom.
  • a bottom section 17 of the shovel arm 16 is provided a plurality of recesses 18 allowing parts of product 2 located on the disc to escape therethrough. The recesses 18 is used minimize the torque of the shovel arm 16 when distributing the product 2 present on the disc 6.
  • the shovel arm 16 comprises a first portion 19 which is flat and extends horizontally from the drive shaft 14 towards the inner wall 8 of the chamber 3, a second portion 20, comprising the recesses 18, which also is flat and extends perpendicular from the first portion 19 vertically in a downward direction towards the disc 6, and a wing portion 21 attached to the first portion 19 at an outer edge 22 thereof.
  • the second portion is preferably shaped to correspond with the shape of the domed shaped of the disc 6 thereby nearly engaging with the disc 6.
  • the wing portion 21 is vertically aligned with the product outlet 5 such that the product 2 fed into the chamber 3 can be cut into pieces by means of the wing portion 21.
  • a plurality of rotatable disintegrator elements 23 is connected to the drive shaft 14 directly above the shovel arm 16 in the lower section of the chamber 3.
  • the disintegrator elements 23 are vertically aligned with the location of the product inlet 4.
  • Each one of the disintegrator elements 23 comprises a grinding edge 24 which is used to grind and/or disintegrate the product 2 towards the inner wall 8 of the chamber 3.
  • the grinding edge 24 is replaceable and can be turn over in any suitable position.
  • the shape, extent and number of disintegrator elements 23 may naturally be varied in any suitable way. They can be mounted in different angles in relation to each other, they can be displaced at a specific distance from each other, and they can be mounted in a cross or to overlap.
  • the disintegrator elements 23 extends more or less from the drive shaft 14 towards the inner wall 8 of the chamber 3 in a tapering manner with the grinding edge 24 provided on the outermost edge thereof.
  • a secondary air inlet 26 is arranged in the lower section of the chamber 3 above the disintegrator elements 23.
  • the secondary air inlet 26 comprises an outer air inlet 27 and a plurality of inner air inlets 28 providing air into the chamber 3.
  • the inner air inlets 28 are arranged along the entire periphery of the chamber 3 in a substantially tangential direction to create circular flow along the inner wall 8 of the chamber 3.
  • the lower section of the chamber 3 comprises protrusions 29 arranged at a distance from each other along the entire periphery of the inner wall 8 of the chamber 3.
  • Each one of the protrusions 29 comprises an exchangeable cutting edge.
  • the protrusions 29 are vertically aligned with the disintegrator element 23 such that the product 2 can be grinded and/or disintegrated between the grinding edges 24 of the disintegrator elements 23 and the cutting edges of the protrusions 29.
  • the exchangeable cutting edge of the protrusion 29 can be placed in different positions in order to adjust the distance between themselves and the grinding edges 24 of the disintegrator elements 23.
  • a product conveyer (not shown), preferably a screw product conveyer, is connected to the product inlet 4 and used to transport the product 2 to the chamber 3 of the flash dryer 1.
  • a pump (not shown) could also be used to input the product 2 to the chamber 3 of the flash dryer 1 via the product inlet 4.
  • the product 2 to be disintegrated and dried is fed into the chamber 3 via the product inlet 4 by means of the product conveyer.
  • the product 2 entering the chamber 3 is cut into pieces by means of the wing portion 21 of the rotating shovel arm 16 and is thereafter disintegrated by means of the rotating disintegrator elements 23 when falling towards the disc 6 in the bottom 7 of the chamber 3 by means of gravity.
  • the product 2 is further grinded and/or disintegrated between the grinding edges 24 of the disintegrator elements 23 and the cutting edges of the protrusions 29.
  • the disintegrated and dried product 2 will finally exit the chamber 3 via the product outlet 5 in the upper section of the chamber 3. Larger pieces of the product 2 will fall down towards the disc 6 in the bottom 7 of the chamber 3 by means of gravity, through the disintegrator elements 23 once again, and reiterate the process described above.
  • the flash dryer 1 can be equipped with a CIP-system comprising pop-in-pop-out (PIPO) nozzles which are activated by means of pressure in order to clean the inner surfaces of the flash dryer 1 that are in contact with the product 2 inside the chamber 3.
  • a CIP-system comprising pop-in-pop-out (PIPO) nozzles which are activated by means of pressure in order to clean the inner surfaces of the flash dryer 1 that are in contact with the product 2 inside the chamber 3.
  • PIPO pop-in-pop-out
  • the disc 6 can be filled with an insulating material, preferably a non-inflammable, such as vermiculite, in order to increase the isolating properties of the disc 6 and limit the heat transfer in a downward direction of the flash dyer 1..
  • an insulating material preferably a non-inflammable, such as vermiculite
  • the disc 6 can be placed in the bottom 7 of the chamber 8 or in fact constitute the bottom 7 of the chamber 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Claims (14)

  1. Sécheur éclair (1) pour le séchage d'un produit (2), comprenant :
    une chambre (3) comportant une entrée de produit (4) et une sortie de produit (5), l'entrée de produit (4) se trouvant dans une section inférieure de la chambre (3) et la sortie de produit (5) dans une section supérieure de la chambre (3),
    un disque (6) présentant une forme de dôme et agencé fixement dans la section inférieure de la chambre (3) sous l'entrée de produit (4), de manière à créer un espace (9) entre un bord extérieur (10) du disque (6) et une paroi intérieure (8) de la chambre (3), dans lequel une épaisseur du disque (6) diminue radialement à partir d'une section centrale (11) du disque (6) vers le bord extérieur (10) du disque (6),
    une entrée d'air primaire (12) agencée sous la chambre (3) et conçue pour fournir de l'air dans la chambre (3) par le biais de l'espace (9),
    une unité d'entraînement (13) agencée sous la chambre (3), laquelle comporte un arbre d'entraînement (14) s'étendant à travers un orifice (15) dans la section centrale (11) du disque (6) dans la section inférieure de la chambre (3),
    une pluralité d'éléments de désintégrateur rotatifs (23) reliés à l'arbre d'entraînement (14) dans la section inférieure de la chambre (3) au-dessus du disque (6), et
    un bras de pelle rotatif (16) relié à l'arbre d'entraînement (14) dans la section inférieure de la chambre (3) au-dessus du disque (6) et sous la pluralité d'éléments de désintégrateur (23), le bras de pelle (16) étant adapté pour distribuer le produit (2) dans la section inférieure de la chambre (3).
  2. Sécheur éclair (1) selon la revendication 1, comprenant en outre une entrée d'air secondaire (26) agencée dans la section inférieure de la chambre (3) au-dessus de la pluralité d'éléments de désintégrateur (23).
  3. Sécheur éclair (1) selon la revendication 2, dans lequel l'entrée d'air secondaire (26) comprend une pluralité d'entrées d'air internes (28) fournissant de l'air dans la chambre (3), les entrées d'air internes (28) étant agencées le long d'une périphérie de la chambre (3).
  4. Sécheur éclair (1) selon l'une quelconque des revendications précédentes, dans lequel le disque (6) comprend des saillies (25) le long de sa périphérie extérieure, lesquelles sont adaptées pour guider de l'air à partir de l'entrée d'air primaire (12) pour l'introduire dans la chambre (3) par le biais de l'espace (9) dans une direction substantiellement verticale.
  5. Sécheur éclair (1) selon l'une quelconque des revendications précédentes, dans lequel le bord extérieur (10) du disque (6) est au moins partiellement arrondi.
  6. Sécheur éclair (1) selon l'une quelconque des revendications précédentes, dans lequel la pluralité d'éléments de désintégrateur (23) sont alignés verticalement avec l'emplacement de l'entrée de produit (4).
  7. Sécheur éclair (1) selon l'une quelconque des revendications précédentes, dans lequel chacun parmi la pluralité d'éléments de désintégrateur (23) comprend un bord de meulage (24), de sorte que le produit (3) est broyé et/ou désintégré entre le bord de meulage (24) et la paroi intérieure (8) de la chambre (3).
  8. Sécheur éclair (1) selon l'une quelconque des revendications précédentes, dans lequel le bras de pelle (16) comprend une pluralité de cavités (18) dans une section basse (17) de celui-ci, permettant à des parties de produit (2) situées sur le disque (6) de s'échapper à travers celles-ci.
  9. Sécheur éclair (1) selon l'une quelconque des revendications précédentes, dans lequel le bras de pelle (16) comprend une partie d'aile (21) fixée à un bord extérieur (22) de celui-ci, la partie d'aile (21) étant alignée verticalement avec l'entrée de produit (4) de telle façon que le produit (2) alimenté dans la chambre (3) est découpé en morceaux.
  10. Sécheur éclair (1) selon l'une quelconque des revendications précédentes, dans lequel le bras de pelle (16) est agencé dans la section inférieure de la chambre (3) pour correspondre verticalement à l'emplacement de l'entrée de produit (4).
  11. Sécheur éclair (1) selon l'une quelconque des revendications précédentes, dans lequel la chambre (3) comprend des saillies (29) agencées à une distance les unes par rapport aux autres le long d'une périphérie de la paroi intérieure (8) de la chambre (3).
  12. Sécheur éclair (1) selon la revendication 11, dans lequel chacune des saillies (29) comprend un bord de coupe remplaçable.
  13. Sécheur éclair (1) selon l'une quelconque des revendications précédentes, comprenant en outre un convoyeur de produit relié à l'entrée de produit (4).
  14. Procédé de séchage d'un produit (2) dans un sécheur éclair (1), comprenant :
    l'introduction du produit (2) dans une chambre (3) du sécheur éclair (1) par une entrée de produit (4) située dans une section inférieure de la chambre (3) sur un disque (6) présentant une forme de dôme et agencé fixement dans la section inférieure de la chambre (3) sous l'entrée de produit (4), dans lequel une épaisseur du disque (6) diminue radialement à partir d'une section centrale (11) du disque (6) vers le bord extérieur (10) du disque (6),
    la mise en rotation d'un bras de pelle (16) dans la section inférieure de la chambre (3) au-dessus du disque (6) pour distribuer le produit (2) dans la section inférieure de la chambre (3),
    la mise en rotation d'une pluralité d'éléments de désintégrateur rotatifs (23) dans la section inférieure de la chambre (3) au-dessus du disque (6) et du bras de pelle (16) pour désintégrer le produit (2),
    l'apport d'air dans la chambre à partir d'une entrée d'air primaire agencée sous la chambre par le biais d'un espace entre un bord extérieur du disque et une paroi intérieure de la chambre pour soulever et sécher le produit,
    l'apport d'air dans la chambre (3) à partir d'une entrée d'air secondaire (26) agencée dans la section inférieure de la chambre (3) au-dessus de la pluralité d'éléments de désintégrateur (23) pour mettre en rotation et sécher le produit (2), et
    le retrait du produit (2) par une sortie de produit (5) dans une section supérieure de la chambre (3).
EP20204151.3A 2020-10-27 2020-10-27 Sécheur éclair pour le séchage d'un produit et procédé de séchage d'un produit dans un sécheur éclair Active EP3992561B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
HUE20204151A HUE072630T2 (hu) 2020-10-27 2020-10-27 Gyorsszárító berendezés termék szárítására és eljárás termék szárítására gyorsszárító berendezésben
ES20204151T ES3040257T3 (en) 2020-10-27 2020-10-27 A flash dryer for drying a product and a method for drying a product in a flash dryer
PL20204151.3T PL3992561T3 (pl) 2020-10-27 2020-10-27 Suszarka błyskawiczna do suszenia produktu i sposób suszenia produktu w suszarce błyskawicznej
EP20204151.3A EP3992561B1 (fr) 2020-10-27 2020-10-27 Sécheur éclair pour le séchage d'un produit et procédé de séchage d'un produit dans un sécheur éclair
PCT/EP2021/079664 WO2022090216A1 (fr) 2020-10-27 2021-10-26 Séchoir éclair pour sécher un produit et procédé de séchage d'un produit dans un séchoir éclair
CA3196433A CA3196433A1 (fr) 2020-10-27 2021-10-26 Sechoir eclair pour secher un produit et procede de sechage d'un produit dans un sechoir eclair

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20204151.3A EP3992561B1 (fr) 2020-10-27 2020-10-27 Sécheur éclair pour le séchage d'un produit et procédé de séchage d'un produit dans un sécheur éclair

Publications (3)

Publication Number Publication Date
EP3992561A1 EP3992561A1 (fr) 2022-05-04
EP3992561B1 true EP3992561B1 (fr) 2025-06-04
EP3992561C0 EP3992561C0 (fr) 2025-06-04

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EP20204151.3A Active EP3992561B1 (fr) 2020-10-27 2020-10-27 Sécheur éclair pour le séchage d'un produit et procédé de séchage d'un produit dans un sécheur éclair

Country Status (6)

Country Link
EP (1) EP3992561B1 (fr)
CA (1) CA3196433A1 (fr)
ES (1) ES3040257T3 (fr)
HU (1) HUE072630T2 (fr)
PL (1) PL3992561T3 (fr)
WO (1) WO2022090216A1 (fr)

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SE547909C2 (en) * 2024-02-26 2025-12-23 Exalant Drying Tech Ab A flash dryer for drying a product and a method for drying a product in a flash dryer
SE547908C2 (en) * 2024-02-26 2025-12-23 Exalant Drying Tech Ab Improved flash dryer

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CN207907629U (zh) * 2018-02-28 2018-09-25 江西雷亚特导电碳黑有限公司 一种副产导电炭黑加工用闪蒸干燥机
CN208349691U (zh) * 2018-06-01 2019-01-08 河北云瑞化工设备有限公司 旋转闪蒸干燥机
CN109201271A (zh) * 2018-08-15 2019-01-15 芜湖卓越纳米新材料股份有限公司 一种纳米碳酸钙的干燥粉碎装置
CN210180012U (zh) * 2019-07-19 2020-03-24 山东荣创催化新材料有限公司 一种高效率的催化剂闪蒸干燥机

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WO2022090216A1 (fr) 2022-05-05
ES3040257T3 (en) 2025-10-29
EP3992561C0 (fr) 2025-06-04
HUE072630T2 (hu) 2025-12-28
PL3992561T3 (pl) 2025-10-20
CA3196433A1 (fr) 2022-05-05

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