EP3992561A1 - 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
EP3992561A1
EP3992561A1 EP20204151.3A EP20204151A EP3992561A1 EP 3992561 A1 EP3992561 A1 EP 3992561A1 EP 20204151 A EP20204151 A EP 20204151A EP 3992561 A1 EP3992561 A1 EP 3992561A1
Authority
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.)
Pending
Application number
EP20204151.3A
Other languages
German (de)
English (en)
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 Tech AB
G Larsson Starch Technology AB
Original Assignee
G Larsson Starch Tech AB
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
Application filed by G Larsson Starch Tech AB, G Larsson Starch Technology AB filed Critical G Larsson Starch Tech AB
Priority to EP20204151.3A priority Critical patent/EP3992561A1/fr
Priority to PCT/EP2021/079664 priority patent/WO2022090216A1/fr
Priority to CA3196433A priority patent/CA3196433A1/fr
Publication of EP3992561A1 publication Critical patent/EP3992561A1/fr
Pending legal-status Critical Current

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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 flash dryer is used for continuous drying of a filter cake, fibrous materials, paste, sludge or similar materials.
  • the flash dryer uses a rotary disintegrator, mill or impeller rotor for disintegration of the material and provides a change of the structure of the material from the paste or fibrous structure to a more particle shaped structure which is more suitable during the drying. Apertures are provided for supply of hot drying gas and for removal of the spent drying gas and removal of the dried material.
  • EP 1 719 963 A2 discloses an apparatus for continuous drying of a product.
  • the apparatus comprises a feeding device, which conveys the product into a rotating disintegrator.
  • the drying gasses are being introduced and passed upwards through the slot and into the disintegrator housing.
  • the drying chamber has a conical shape with the point towards the outlet for the drying gasses.
  • the product because of the rotation of the disintegrator, is being pressed by the wall of the cone away from the the outlet for the drying air with a resulting accelerating force which is greater than the force of gravity.
  • the dried material and the spent drying air are discharged through the product outlet in the upper part of the drying chamber.
  • 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.
  • a flash dryer for drying a product.
  • the flash dryer comprises a chamber having a product inlet and a product outlet, the product inlet being located in a lower section of the chamber and the product outlet in a upper section of the chamber, a disc fixedly arranged in the lower section of the chamber below the product inlet, such that a gap is created between an outer edge of the disc and an inner wall of the chamber, wherein a thickness of the disc is decreasing radially from a mid-section of the disc towards the outer edge of the disc, a primary air inlet arranged below the chamber and arranged to provide air into the chamber via the gap, a drive unit arranged below the chamber having a drive shaft extending through a hole in the mid-section of the disc into the lower section of the chamber, a plurality of rotatable disintegrator elements connected to the drive shaft in the lower section of the chamber above the
  • 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.
  • Another advantage is that the product will no longer be able to accumulate between the disc and the bottom portion of the chamber as with the conventional flash dryers due to rotation of the disc.
  • the flash dryer may further comprise a secondary air inlet arranged in the lower section of the chamber above the plurality of disintegrator elements.
  • 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 have a domed shape.
  • 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 shovel arm may be arranged in the lower section of the chamber to vertically correspond with the location of the product inlet.
  • 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 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 of disintegrator elements to rotate and
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
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 Pending EP3992561A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20204151.3A EP3992561A1 (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 EP3992561A1 (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 (1)

Publication Number Publication Date
EP3992561A1 true EP3992561A1 (fr) 2022-05-04

Family

ID=73029947

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20204151.3A Pending EP3992561A1 (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 (3)

Country Link
EP (1) EP3992561A1 (fr)
CA (1) CA3196433A1 (fr)
WO (1) WO2022090216A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115127322B (zh) * 2022-08-31 2022-11-18 山东德利科工业装备有限公司 一种便于清理的循环蓄热式旋转闪蒸干燥机

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533459A1 (fr) * 1982-09-24 1984-03-30 Freunt Ind Co Ltd Machine de granulation et de revetement
CN2223647Y (zh) * 1995-02-25 1996-04-03 沈阳市三友干燥设备厂 液糊状物料干燥粉碎机构
EP1091183A1 (fr) * 1999-10-08 2001-04-11 Herbert Anglberger Dispositif de séchage et de nettoyage de matière en petits morceaux, notamment de déchets fractionnés d'une matière plastique
CN2755526Y (zh) * 2004-12-06 2006-02-01 山东天力干燥设备有限公司 用于浆料干燥的闪蒸干燥机
EP1719963A2 (fr) 2005-05-04 2006-11-08 Sahene Engineering v/Henning Rasmussen Dispositif de séchage en continu d'un gâteau de masse filtrante, de matières fibreuses, de pâte, de boues, ou de matières similaires.
CN202420115U (zh) * 2011-12-20 2012-09-05 昆山京昆油田化学科技开发公司 一种植物胶干燥预破碎装置
CN102183134B (zh) * 2011-03-08 2012-10-03 常州先锋干燥设备有限公司 旋转闪蒸干燥系统
CN202562247U (zh) * 2012-05-15 2012-11-28 攀枝花东方钛业有限公司 一种闪蒸干燥机
CN203928599U (zh) * 2014-06-17 2014-11-05 江苏宇通干燥工程有限公司 节能新型闪蒸干燥组合机组
EP2908077A1 (fr) * 2012-10-10 2015-08-19 Hosokawa Micron Corporation Dispositif de séchage pneumatique
CN102628641B (zh) * 2012-04-20 2015-09-09 茂名市银华高岭土实业有限公司 一种卧式闪蒸干燥机
WO2015136070A1 (fr) * 2014-03-13 2015-09-17 Spx Flow Technology Danmark A/S Sécheur éclair tournant permettant de produire une poudre par séchage éclair tournant
CN204974037U (zh) * 2015-08-27 2016-01-20 浙江华洲药业有限公司 旋转闪蒸干燥机主机专用粉碎叶片
KR20160024655A (ko) * 2014-08-26 2016-03-07 한국에너지기술연구원 선회유도체를 이용한 기류 건조장치
CN205308516U (zh) * 2016-01-23 2016-06-15 响水县智诚知识产权信息服务有限公司 一种阵列风筒型谷物粉碎机
CN206875880U (zh) * 2017-04-28 2018-01-12 江苏健达干燥工程有限公司 一种能够防止积料的闪蒸干燥机
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

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533459A1 (fr) * 1982-09-24 1984-03-30 Freunt Ind Co Ltd Machine de granulation et de revetement
CN2223647Y (zh) * 1995-02-25 1996-04-03 沈阳市三友干燥设备厂 液糊状物料干燥粉碎机构
EP1091183A1 (fr) * 1999-10-08 2001-04-11 Herbert Anglberger Dispositif de séchage et de nettoyage de matière en petits morceaux, notamment de déchets fractionnés d'une matière plastique
CN2755526Y (zh) * 2004-12-06 2006-02-01 山东天力干燥设备有限公司 用于浆料干燥的闪蒸干燥机
EP1719963A2 (fr) 2005-05-04 2006-11-08 Sahene Engineering v/Henning Rasmussen Dispositif de séchage en continu d'un gâteau de masse filtrante, de matières fibreuses, de pâte, de boues, ou de matières similaires.
CN102183134B (zh) * 2011-03-08 2012-10-03 常州先锋干燥设备有限公司 旋转闪蒸干燥系统
CN202420115U (zh) * 2011-12-20 2012-09-05 昆山京昆油田化学科技开发公司 一种植物胶干燥预破碎装置
CN102628641B (zh) * 2012-04-20 2015-09-09 茂名市银华高岭土实业有限公司 一种卧式闪蒸干燥机
CN202562247U (zh) * 2012-05-15 2012-11-28 攀枝花东方钛业有限公司 一种闪蒸干燥机
EP2908077A1 (fr) * 2012-10-10 2015-08-19 Hosokawa Micron Corporation Dispositif de séchage pneumatique
WO2015136070A1 (fr) * 2014-03-13 2015-09-17 Spx Flow Technology Danmark A/S Sécheur éclair tournant permettant de produire une poudre par séchage éclair tournant
CN203928599U (zh) * 2014-06-17 2014-11-05 江苏宇通干燥工程有限公司 节能新型闪蒸干燥组合机组
KR20160024655A (ko) * 2014-08-26 2016-03-07 한국에너지기술연구원 선회유도체를 이용한 기류 건조장치
CN204974037U (zh) * 2015-08-27 2016-01-20 浙江华洲药业有限公司 旋转闪蒸干燥机主机专用粉碎叶片
CN205308516U (zh) * 2016-01-23 2016-06-15 响水县智诚知识产权信息服务有限公司 一种阵列风筒型谷物粉碎机
CN206875880U (zh) * 2017-04-28 2018-01-12 江苏健达干燥工程有限公司 一种能够防止积料的闪蒸干燥机
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
CA3196433A1 (fr) 2022-05-05

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