EP1719963A2 - Apparatus for continuous drying of a filter cake, fibrous materials, paste, sludge, fibres, and similar materials - Google Patents

Apparatus for continuous drying of a filter cake, fibrous materials, paste, sludge, fibres, and similar materials Download PDF

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Publication number
EP1719963A2
EP1719963A2 EP06388033A EP06388033A EP1719963A2 EP 1719963 A2 EP1719963 A2 EP 1719963A2 EP 06388033 A EP06388033 A EP 06388033A EP 06388033 A EP06388033 A EP 06388033A EP 1719963 A2 EP1719963 A2 EP 1719963A2
Authority
EP
European Patent Office
Prior art keywords
drying
powder
air
disintegrator
gasses
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.)
Withdrawn
Application number
EP06388033A
Other languages
German (de)
French (fr)
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EP1719963A3 (en
Inventor
Engineering V/Henning Rasmussen Sahene
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.)
SAHENE ENGINEERING V HENNING R
Original Assignee
SAHENE ENGINEERING V HENNING R
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 SAHENE ENGINEERING V HENNING R filed Critical SAHENE ENGINEERING V HENNING R
Publication of EP1719963A2 publication Critical patent/EP1719963A2/en
Publication of EP1719963A3 publication Critical patent/EP1719963A3/en
Withdrawn legal-status Critical Current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
    • F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
    • F26B1/005—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids by means of disintegrating, e.g. crushing, shredding, milling the materials to be dried
    • 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
    • F26B17/107—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 pneumatically inducing within the drying enclosure a curved flow path, e.g. circular, spiral, helical; Cyclone or Vortex dryers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/08—Drying solid materials or objects by processes not involving the application of heat by centrifugal treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B7/00—Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups F26B3/00 and F26B5/00
    • F26B7/007—Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups F26B3/00 and F26B5/00 centrifugal fluidised beds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers

Definitions

  • the invention is concerned with an apparatus for continuous drying of a filter cake, fibrous materials, paste, sludge or similar materials and of a nature that uses a rotary disintegrator, mill or impeller rotor for disintegration of the material and hence a change of the structure of the material from the paste/fibrous structure which it is very difficulty to treat efficiently in a drying apparatus to a more particle shaped structure which is more suitable during the drying.
  • Drying apparatuses of this type are already commonly known as f. inst. Described in DK 149.538B and in patent applications nos. 318/69 of 21. Jan. 1969 and 0098/91 of 21. Jan 1991 .
  • the purpose with the invention is to stabilize the particle movements in the drying chamber and improve the drying process so that the particles will be gentler and more efficiently dried compared to the commonly known technique.
  • the purpose is also in special cases to dry particles in gases, which are desired to be encapsulated in the dried particles.
  • step 2 air volume is blown tangentially with the drying chamber wall into the drying chamber and with a velocity which supports the rotation of the particles.
  • the step 2 air volume is normal dry and has a for the particles moderate temperature.
  • a force opposing the direction of outgoing air much greater than the force of gravitation is obtained by applying the particles a fierce axial rotation in the drying chamber by means of a disintegrator or an impeller together with step 2 air tangentially blown into the drying/floating zone and by a conical design of the drying chamber with the point of the cone pointing towards the outlet for the drying air.
  • the particles will due to the rotation be pressed by means of the wall of the cone towards the wide end of the cone where the particles are being gently after dried by means of the step 2 air volumes.
  • the drying chamber was cylindrical or conical with the wide end pointing towards the outlet for the drying air the force of gravity would influence the particles only. Consequently the particles will jump up and down which will result in an uneven drying of the particles.
  • Figure 1 shows the drying chamber according to the invention with impeller rotor or disintegrator together with the placement of the rotating powder layer in the drying chamber and
  • Figure 2 shows the drying chamber in a closed cycle drying air stream according to the invention with powder outlet in the side of the vessel.
  • Figure 1 shows a cut in the drying chamber.
  • the paste like material which must be dried, is being fed into the drying chamber by means of a charging apparatus, f. inst. a screw conveyor 1, to the predominant surface of revolution disintegrator housing 2 delineated by the bottom 3, where the paste is being disintegrated by the rotating disintegrator 4 which essentially has a vertical rotation, at the same time the just introduced material is being mixed with the semi-dried material, which is being fed into the disintegrator housing by the air stream 5.
  • the air stream 5 is being created, as in a ventilator, by means of an impeller or disintegrator 4, which is rotating and thereby is blowing air away and also sucks air.
  • the under part of the disintegrator housing 7, is being fed with drying gas and this is passing up through the slot 8, which is rotationally symmetrical, and into the disintegrator housing and by contact with the material being dried in the disintegrator housing a pre-drying of this material is being implemented.
  • a step 2 drying air is being fed through the ring formed chamber 10 with a, for the particles in the drying/floating zone 5, moderate temperature.
  • the step 2 air volume is being blown rotationally symmetrical and tangential into the drying chamber cylinder 12 through the slots 11.
  • a centrifugal power 13 much greater than the force of gravity and oppositely directed to the drying air outlet 14, is being achieved by applying the symmetrically rotating layer of powder 16 a severe and axial rotation in the floating zone in the drying chamber 5 by means of a disintegrator or impeller system 4, together with the support by step 2 air 9 tangentially blown into the floating zone and by designing the drying chamber 12 conically with the point towards the outlet for the drying air 14. Because of the effect of the rotation the particles will by means of the wall of the cone 12 by means of an accelerating force 15 be pressed towards the wide part of the cone and by a resulting accelerating force 13.
  • the accelerating force 13 holds the particles in position during the stay in the floating zone until the particles are sufficiently dried to escape through the outlet 14 from the drying chamber together with the drying air.
  • the symmetrical and rotating layer of powder 16 is being after dried as in a fluid bed by means of the step 2 air volume 9, which is normally dry and has a for the particles moderate temperature.
  • the finally dried material is being removed together with the now cooled down drying air through the product point of discharge.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The apparatus embodies a feeding device (1), which conveys the paste/fibrous feeding material into a rotating disintegrator (4). In the under part of the apparatus the drying gasses (6) are being introduced and passed upwards through the slot (8) and into the disintegrator housing (4). The drying chamber has a conical shape with the point towards the outlet for the drying gasses (14), where the symmetrical rotating layer of powder (16), because of the rotation of the disintegrator (4), is being pressed by the wall of the cone (12) away from the the outlet for the drying air (14) with a resulting accelerating force (13) which is greater than the force of gravity. The symmetrical rotating layer of powder (16) is being held in position during the stay in the drying/floating zone (5). The finally dried material and the spent drying air is being discharged through the product outlet (17) and (18) in the upper part of the drying chamber.
A step 2 air volume (9), which has a for the particles moderate temperature, is being blown from the ring chamber (10) through slots or nozzles (11) into the drying/floating zone and can for this reason gently after dry the symmetrical rotating layer of powder (16) as in a fluid bed.

Description

  • The invention is concerned with an apparatus for continuous drying of a filter cake, fibrous materials, paste, sludge or similar materials and of a nature that uses a rotary disintegrator, mill or impeller rotor for disintegration of the material and hence a change of the structure of the material from the paste/fibrous structure which it is very difficulty to treat efficiently in a drying apparatus to a more particle shaped structure which is more suitable during the drying.
  • Drying apparatuses of this type are already commonly known as f. inst. Described in DK 149.538B and in patent applications nos. 318/69 of 21. Jan. 1969 and 0098/91 of 21. Jan 1991 .
  • The purpose with the invention is to stabilize the particle movements in the drying chamber and improve the drying process so that the particles will be gentler and more efficiently dried compared to the commonly known technique. The purpose is also in special cases to dry particles in gases, which are desired to be encapsulated in the dried particles.
  • These purposes will be obtained by, in the drying chamber for the particles, to apply a powerful accelerating force which is axial oriented and directed opposite the direction of the outgoing drying air in order to hold the particles in position during the stay in the drying/floating zone. In the same zone a step 2 air volume is blown tangentially with the drying chamber wall into the drying chamber and with a velocity which supports the rotation of the particles. The step 2 air volume is normal dry and has a for the particles moderate temperature.
  • A force opposing the direction of outgoing air much greater than the force of gravitation, is obtained by applying the particles a fierce axial rotation in the drying chamber by means of a disintegrator or an impeller together with step 2 air tangentially blown into the drying/floating zone and by a conical design of the drying chamber with the point of the cone pointing towards the outlet for the drying air.
  • The particles will due to the rotation be pressed by means of the wall of the cone towards the wide end of the cone where the particles are being gently after dried by means of the step 2 air volumes.
  • If the drying chamber was cylindrical or conical with the wide end pointing towards the outlet for the drying air the force of gravity would influence the particles only. Consequently the particles will jump up and down which will result in an uneven drying of the particles.
  • The invention is further explained in the following with reference to the drawing where
  • Figure 1 shows the drying chamber according to the invention with impeller rotor or disintegrator together with the placement of the rotating powder layer in the drying chamber and
  • Figure 2 shows the drying chamber in a closed cycle drying air stream according to the invention with powder outlet in the side of the vessel.
  • Figure 1 shows a cut in the drying chamber. The paste like material, which must be dried, is being fed into the drying chamber by means of a charging apparatus, f. inst. a screw conveyor 1, to the predominant surface of revolution disintegrator housing 2 delineated by the bottom 3, where the paste is being disintegrated by the rotating disintegrator 4 which essentially has a vertical rotation, at the same time the just introduced material is being mixed with the semi-dried material, which is being fed into the disintegrator housing by the air stream 5. The air stream 5 is being created, as in a ventilator, by means of an impeller or disintegrator 4, which is rotating and thereby is blowing air away and also sucks air.
  • The under part of the disintegrator housing 7, is being fed with drying gas and this is passing up through the slot 8, which is rotationally symmetrical, and into the disintegrator housing and by contact with the material being dried in the disintegrator housing a pre-drying of this material is being implemented.
  • A step 2 drying air is being fed through the ring formed chamber 10 with a, for the particles in the drying/floating zone 5, moderate temperature. The step 2 air volume is being blown rotationally symmetrical and tangential into the drying chamber cylinder 12 through the slots 11.
  • A centrifugal power 13 much greater than the force of gravity and oppositely directed to the drying air outlet 14, is being achieved by applying the symmetrically rotating layer of powder 16 a severe and axial rotation in the floating zone in the drying chamber 5 by means of a disintegrator or impeller system 4, together with the support by step 2 air 9 tangentially blown into the floating zone and by designing the drying chamber 12 conically with the point towards the outlet for the drying air 14. Because of the effect of the rotation the particles will by means of the wall of the cone 12 by means of an accelerating force 15 be pressed towards the wide part of the cone and by a resulting accelerating force 13.
  • The accelerating force 13 holds the particles in position during the stay in the floating zone until the particles are sufficiently dried to escape through the outlet 14 from the drying chamber together with the drying air. The symmetrical and rotating layer of powder 16 is being after dried as in a fluid bed by means of the step 2 air volume 9, which is normally dry and has a for the particles moderate temperature.
  • The finally dried material is being removed together with the now cooled down drying air through the product point of discharge.
  • The invention concerning drying of particles in an environment of gasses, which are wanted to be encapsulated in the dried particles, is being explained further with reference to figure 2.
  • There are certain materials such as f. inst. sludge, which contains gasses, which it is desirable to preserve in the dried powder.
  • An arrangement of the drying chamber 1 as shown in figure 1 with a closed cycle for the drying air, where the fines powder is being filtrated in a filtration room 3 and where the drying air is being cooled and dewatered in a condenser 5 afterwards being blown by means of the fan 6 into the drying chamber 2 passing through a filter 7 and passing through an indirect heating source 8. The particles are being discharged through an outlet device 10 as round solid balls. Inside the balls are small pockets, which contains the gasses, which originally were in the material 1 or from gasses, which were fed into the drying gasses. From the filter 3 the fines powder is being conveyed back to the feeding device for the material to be dried and is being mixed with the paste like material. The step 2 air volume, as shown in figure 1, is being regulated for volume and temperature by means of the dampers 9.

Claims (3)

  1. Apparatus for continous drying of filter cake, paste, fibrous materials, sludge, fibres and similar materials and of a nature figure 1, which incorporates a feeding device f. inst. A screw conveyor (1), which feeds the paste/fibrous feed product to a rotating disintegrator (4) which has an essentially vertical axis of rotation in a main form predominantly surface of revolution Housing (2) delineated by the bottom (3), which from below is supplied with drying gasses (6), which passes upwards through the slot (8) and into the disintegrator housing (4), being characterized in that, the drying chamber (12)is designed as a cone with the point towards the outlet (14), where the symmetrical rotating layer of powder (16) because of rotation of disintegrator or impeller system (4) is being pressed by the wall of the cone (12) away from the outlet (14) with a resulting accelerating force (13) which is greater than the force of gravity and the symmetrical rotating layer of powder (16) thus being held in position during the stay in the drying/floating zone (5).
  2. Apparatus according to claim 1, being characterized in that a step 2 air volume (9), which has a for the particles moderate temperature, is being blown from the ring chamber (10) through slots or nozzles (11) into the drying/floating zone and hence can gently after dry the symmetrical rotating layer of powder (16) as in a fluid bed.
  3. Apparatus according to claim 1, which with an arrangement of the drying chamber (1) figure 2 in a closed cycle for the drying air, when the fines powder is being filtrated in a filter room (3) and the drying air is being cooled and dewatered in a condenser (5), afterwards being pumped by a fan (6) into the drying chamber (2) through a filter (7) and through an indirect heating device (8). From the filter (3) the fines powder is being conveyed back to the feeding device and mixed with the paste like material. The step 2 air volume, as shown in figure 1, is being regulated for volume and temperature by means of the dampers (9). Being characterized in that the particles which are being discharged from the air lock (10), are solid and have small pockets which contain the gasses which were in the feed material (1) or gasses which have been fed into the drying gasses.
EP06388033A 2005-05-04 2006-05-03 Apparatus for continuous drying of a filter cake, fibrous materials, paste, sludge, fibres, and similar materials Withdrawn EP1719963A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DKPA200500656 2005-05-04

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EP1719963A2 true EP1719963A2 (en) 2006-11-08
EP1719963A3 EP1719963A3 (en) 2009-03-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010091162A (en) * 2008-10-07 2010-04-22 Katagiri Bokujo:Kk Dryer
EP3992561A1 (en) 2020-10-27 2022-05-04 G. Larsson Starch Technology AB A flash dryer for drying a product and a method for drying a product in a flash dryer

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB981750A (en) * 1962-02-03 1965-01-27 Bayer Ag Apparatus for drying particles carried in a stream of gas
GB1183355A (en) * 1966-03-10 1970-03-04 Siemens Ag Apparatus for Facilitating Heat Exchange or Chemical Reaction between Solid or Liquid Particles and Working Gases
US3592395A (en) * 1968-09-16 1971-07-13 Int Dehydrating Corp Stirred fluid-bed dryers
DE3108875A1 (en) * 1981-03-09 1982-09-16 Kraftwerk Union AG, 4330 Mülheim TURNING FLOWS FOR THERMAL TREATMENT OF FINE GRAIN OR GRANULAR GOODS
EP0141403A2 (en) * 1983-11-10 1985-05-15 APV Anhydro A/S Apparatus for fluid-bed drying, particularly for simultaneous drying and disintegration of a material in the form of a paste
DE3612049A1 (en) * 1986-04-10 1987-10-15 Josef Kuehlmann Device for drying chicken excrement
WO1992012796A1 (en) * 1991-01-21 1992-08-06 Bontech Engineering A/S A process for continuous disintegration and/or drying of materials, such as paste, sludge, press cake, filter cake or the like, particularly fibrous materials and an apparatus for carrying out the process
US5544426A (en) * 1993-07-13 1996-08-13 Fuji Paudal Kabushiki Kaisha Apparatus and method for processing moistened powder and granular materials
WO1997019307A1 (en) * 1995-11-21 1997-05-29 Apv Anhydro A/S A process and an apparatus for producing a powdered product by spin flash drying
US5647142A (en) * 1996-05-13 1997-07-15 Niro A/S Apparatus and process for drying a moist material dispersed or dispersible in a stream of drying gas
WO1999027316A1 (en) * 1997-11-22 1999-06-03 Twister Milieu B.V. Device and method for separating liquid and solid constituents of a flow of material
US6065695A (en) * 1998-06-12 2000-05-23 Shimasaki; Tatsuaki Dry and crush treating method using jet burner and treating apparatus therefor
EP1287304A1 (en) * 2000-06-09 2003-03-05 Andritz AG Method and installation for drying sludge
EP1319632A1 (en) * 2001-12-13 2003-06-18 Klimapol Sp.Z O.O.J.V. Process and device for drying of sludge, in particular sewage sludge
DE10309292A1 (en) * 2003-03-04 2004-09-23 Allgaier Werke Gmbh Assembly for processing loose powder of granule materials, for drying or cooling or classifying, has an upper feed into the process zone where a circular and upwards gas flow is generated from the base

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB981750A (en) * 1962-02-03 1965-01-27 Bayer Ag Apparatus for drying particles carried in a stream of gas
GB1183355A (en) * 1966-03-10 1970-03-04 Siemens Ag Apparatus for Facilitating Heat Exchange or Chemical Reaction between Solid or Liquid Particles and Working Gases
US3592395A (en) * 1968-09-16 1971-07-13 Int Dehydrating Corp Stirred fluid-bed dryers
DE3108875A1 (en) * 1981-03-09 1982-09-16 Kraftwerk Union AG, 4330 Mülheim TURNING FLOWS FOR THERMAL TREATMENT OF FINE GRAIN OR GRANULAR GOODS
EP0141403A2 (en) * 1983-11-10 1985-05-15 APV Anhydro A/S Apparatus for fluid-bed drying, particularly for simultaneous drying and disintegration of a material in the form of a paste
DE3612049A1 (en) * 1986-04-10 1987-10-15 Josef Kuehlmann Device for drying chicken excrement
WO1992012796A1 (en) * 1991-01-21 1992-08-06 Bontech Engineering A/S A process for continuous disintegration and/or drying of materials, such as paste, sludge, press cake, filter cake or the like, particularly fibrous materials and an apparatus for carrying out the process
US5544426A (en) * 1993-07-13 1996-08-13 Fuji Paudal Kabushiki Kaisha Apparatus and method for processing moistened powder and granular materials
WO1997019307A1 (en) * 1995-11-21 1997-05-29 Apv Anhydro A/S A process and an apparatus for producing a powdered product by spin flash drying
US5647142A (en) * 1996-05-13 1997-07-15 Niro A/S Apparatus and process for drying a moist material dispersed or dispersible in a stream of drying gas
WO1999027316A1 (en) * 1997-11-22 1999-06-03 Twister Milieu B.V. Device and method for separating liquid and solid constituents of a flow of material
US6065695A (en) * 1998-06-12 2000-05-23 Shimasaki; Tatsuaki Dry and crush treating method using jet burner and treating apparatus therefor
EP1287304A1 (en) * 2000-06-09 2003-03-05 Andritz AG Method and installation for drying sludge
EP1319632A1 (en) * 2001-12-13 2003-06-18 Klimapol Sp.Z O.O.J.V. Process and device for drying of sludge, in particular sewage sludge
DE10309292A1 (en) * 2003-03-04 2004-09-23 Allgaier Werke Gmbh Assembly for processing loose powder of granule materials, for drying or cooling or classifying, has an upper feed into the process zone where a circular and upwards gas flow is generated from the base

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010091162A (en) * 2008-10-07 2010-04-22 Katagiri Bokujo:Kk Dryer
EP3992561A1 (en) 2020-10-27 2022-05-04 G. Larsson Starch Technology AB A flash dryer for drying a product and a method for drying a product in a flash dryer
WO2022090216A1 (en) 2020-10-27 2022-05-05 G. Larsson Starch Technology Ab A flash dryer for drying a product and a method for drying a product in a flash dryer

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