EP0017040B1 - Séchoir par contact à couche mince - Google Patents

Séchoir par contact à couche mince Download PDF

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Publication number
EP0017040B1
EP0017040B1 EP80101291A EP80101291A EP0017040B1 EP 0017040 B1 EP0017040 B1 EP 0017040B1 EP 80101291 A EP80101291 A EP 80101291A EP 80101291 A EP80101291 A EP 80101291A EP 0017040 B1 EP0017040 B1 EP 0017040B1
Authority
EP
European Patent Office
Prior art keywords
dryer
rotor
film contact
product
thin
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.)
Expired
Application number
EP80101291A
Other languages
German (de)
English (en)
Other versions
EP0017040A1 (fr
Inventor
Burkhard Dr. Braun
Bernhard Dr. Vosteen
Reiner Dipl.-Ing. Skerhut
Adolf Sinn
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.)
Luwa Ltd
Bayer AG
Original Assignee
Luwa Ltd
Bayer AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6066278&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0017040(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Luwa Ltd, Bayer AG filed Critical Luwa Ltd
Publication of EP0017040A1 publication Critical patent/EP0017040A1/fr
Application granted granted Critical
Publication of EP0017040B1 publication Critical patent/EP0017040B1/fr
Expired 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
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
    • F26B3/22—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source and the materials or objects to be dried being in relative motion, e.g. of vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
    • F26B11/16—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a vertical or steeply-inclined plane
    • 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
    • F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
    • F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined

Definitions

  • the invention is based on a thin-film contact dryer with a rotor which has sheet-like distribution elements which extend in the radial direction.
  • the rotor wi-d repeatedly throws the wet material into the heated inner wall of the dryer until it can finally be removed in a free-flowing, dry form at the other end of the dryer.
  • tubers In the case of moist goods which are fed as pumpable paste into a thin-film contact dryer, larger product agglomerates (tubers) very often form, which in pea to hazelnut sizes penetrate the otherwise powdery dry goods. With a given tendency to granulate, tuber formation is also possible with free-flowing moist materials.
  • the tubers which are still moist inside, make the dry material unusable because of it. does not meet the requirements for residual moisture, grindability and handling. Sifting and returning the tuber portion is very expensive. Therefore, the horizontal thin-film contact dryer could not be used in cases where small amounts of tubers were already formed.
  • bent-back distribution elements have been developed which should prevent the tubers by drawing the product into the conical gap between the distribution elements (circumferential) and the cylindrical heating surface (resting) and spreading it. It was shown, however, that a noticeable, but in no case sufficient reduction in the proportion of tubers in the dry material could be achieved.
  • Another proposal is based on increasing the product dwell time by tilting the dryer so that the tubers are destroyed. However, due to the increased amount of product in the dryer there are impermissible mechanical stresses on the high-speed rotor.
  • DE-A-2724281 describes a dryer for bulk materials, the rotor of which is equipped with radial blades.
  • segment webs are provided which, together with the blades, form pocket-shaped cells for gripping and for further transport of the bulk material.
  • the blades with the associated segment webs are offset in the longitudinal direction with respect to the blades located in the adjacent row; d. that is, the individual webs lie in different planes perpendicular to the rotor axis. Because of this arrangement, larger product tubers, particularly in the case of agglomerating products, would be gripped by the cells and transported through the dryer, which leads to the disadvantages described above.
  • With the rotor internals described in DE-A-2 724 281 it is only achieved that the heat exchange and thus the dryer performance is improved.
  • the invention has for its object to develop a thin-film contact dryer, which in any case delivers a lump-free powdered dry material.
  • the width d of the annular gap is advantageously greater than the distance s of the distribution elements from the dryer wall.
  • the annular gap does not hinder the conveyance of the already powdery, free-flowing product parts which are distributed over the circumference of the dryer in a thin layer due to the high centrifugal forces.
  • the bulbs are held back by the ring weir until they are gripped by the distribution elements and crushed into powder can also pass through the ring gap.
  • the particle size of the dry material then corresponds at most to the width of the annular gap.
  • the dryer housing 1 is basically set up horizontally. Its main components are the cylindrical housing 1, the rotor 2 with rotor elements 3 and the feed screw 4 at the right end.
  • the rotor elements are, in a known manner, conveying, spring and circulating elements.
  • the dryer housing 1 is provided with a heating jacket 5. At the ends of the dryer there are end flanges 6 and 7.
  • the paste-like material to be dried is metered in through the nozzle 8 in the area of the feed screw 4. Then it is gripped by the rotor blades 3 and flung against the inner wall 9 of the drying room. Due to the centrifugal forces that occur, the product delivery remains limited to a narrow annular zone on the inner wall 9 of the dryer.
  • the dried product is removed from the product discharge 10 at the left end of the dryer.
  • the vapors formed are sucked off through the nozzle 11.
  • the rotor In the middle third of the dryer, the rotor is equipped with a ring weir 13 and the associated distribution elements 12 (see enlarged section according to FIGS. 2 and 3).
  • the ring weir 13 follows seen in the direction of flow, i. H. from right to left, directly onto the associated distribution elements 12.
  • the shape of the ring weir 13 and the associated distribution elements 12 can be seen from FIG.
  • the distribution elements 12 consist of bent-back metal sheets which are fastened centrally to the rotor 2 and end directly in front of the inner wall 9 of the dryer.
  • the distance s between the outer edge of the distribution plates 12 and the inner wall 9 is z. B. in the order of 1 mm.
  • the immediately following ring weir 13 consists of an annular disc which is fastened in the middle to the rotor 2 by means of webs 14.
  • the radius of the annular disk is dimensioned such that a narrow annular gap 15 remains between its outer edge and the inner wall 9 of the dryer.
  • Its gap width d must be larger than the gap s between the distribution elements 12 and the dryer wall 9. In practice, it is between 2 and 5 mm. If possible, the ring weir 13 should connect flush to the distribution elements. However, the distance between the weir and the distribution elements must never be greater than the width d of the annular gap 15.
  • the moist material 16 which is partially agglomerated into tubers 17, is transported along the inner wall 9 of the dryer due to the centrifugal forces and is thereby dried by the heat supplied by the heating jacket 5.
  • the ring weir 13 prevents the bulbs 17 from rolling between the associated distribution elements 12 and not being grasped by them at all.
  • the mode of operation of the ring weir 13 thus consists in the tubers 17 being backed up in the area of the associated distribution elements 12.
  • the vapors can flow freely through the large semicircular openings 18 in the ring weir 13.
  • the same purpose as the ring weir 13 described would therefore also serve a baffle plate with openings (for the passage of the vapors).
  • the location of such a unit in the dryer is not very critical. However, it is recommended to install the ring weir in connection with the associated distribution elements at a distance from the product entry 8 which corresponds to at least 1 third and at most 2 thirds of the rotor length L. If the ring weir 13 is arranged too close to the entry 8, the gap 15 can be blocked by a product which has not yet been converted into the powder phase. If it is attached too close to the product discharge 10, on the other hand, it is no longer guaranteed that the shredded tuber components are still sufficiently dried.

Claims (3)

1. Séchoir avec contact en couche mince comportant un rotor (2), lequel présente des éléments distributeurs (12) s'étendant dans la direction radiale, caractérisé en ce que dans le tiers central à arrière du rotor (2) est monté au moins un barrage annulaire (13) tournant avec le rotor et retenant les nodules de produit, qui consiste en un disque annulaire continu, qui laisse ouverte par rapport à la paroi intérieure du séchoir (9) une fente annulaire étroite et qui, vu dans la direction de la circulation, est monté directement en arrière des éléments distributeurs (12) agissant en tant qu'organes de broyage pour les nodules de produit.
2. Séchoir avec contact en couche mince selon la revendication 1, caractérisé en ce que la largeur d de la fente annulaire (15) est supérieure à l'écartement s des éléments distributeurs apparentés (12) de la paroi de séchoir (9).
3. Séchoir avec contact en couche mince selon les revendications 1 et 2, caractérisé en ce que plusieurs unités de barrage annulaire (13) et d'éléments distributeurs apparentés (12) sont branchées les unes à la suite des autres.
EP80101291A 1979-03-23 1980-03-13 Séchoir par contact à couche mince Expired EP0017040B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2911549 1979-03-23
DE2911549A DE2911549C2 (de) 1979-03-23 1979-03-23 Dünnschichtkontakttrockner

Publications (2)

Publication Number Publication Date
EP0017040A1 EP0017040A1 (fr) 1980-10-15
EP0017040B1 true EP0017040B1 (fr) 1983-03-02

Family

ID=6066278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101291A Expired EP0017040B1 (fr) 1979-03-23 1980-03-13 Séchoir par contact à couche mince

Country Status (4)

Country Link
US (1) US4420892A (fr)
EP (1) EP0017040B1 (fr)
JP (2) JPS55149603A (fr)
DE (2) DE2911549C2 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60112804A (ja) * 1983-11-24 1985-06-19 Chisso Corp ポリオレフインパウダ−の後処理装置
IT1248826B (it) * 1990-05-29 1995-01-30 Spada Massimiliano Essicatore continuo
US8124036B1 (en) 2005-10-27 2012-02-28 ADA-ES, Inc. Additives for mercury oxidation in coal-fired power plants
JP2006219645A (ja) * 2005-02-14 2006-08-24 Dai Ichi Kogyo Seiyaku Co Ltd ビニルピロリドン系重合体の乾燥方法
US8064182B2 (en) 2007-02-28 2011-11-22 Adc Telecommunications, Inc. Overvoltage protection plug
US7946863B2 (en) * 2008-04-25 2011-05-24 Adc Telecommunications, Inc. Circuit protection block
US8411404B2 (en) * 2008-05-27 2013-04-02 Adc Telecommunications, Inc. Overvoltage protection plug
US8524179B2 (en) 2010-10-25 2013-09-03 ADA-ES, Inc. Hot-side method and system
AU2011212805B2 (en) 2010-02-04 2016-03-24 ADA-ES, Inc. Method and system for controlling mercury emissions from coal-fired thermal processes
US8951487B2 (en) 2010-10-25 2015-02-10 ADA-ES, Inc. Hot-side method and system
US8496894B2 (en) 2010-02-04 2013-07-30 ADA-ES, Inc. Method and system for controlling mercury emissions from coal-fired thermal processes
CA2792732C (fr) 2010-03-10 2018-07-31 Martin A. Dillon Procede d'injection en phase diluee de matieres alcalines seches
US8784757B2 (en) 2010-03-10 2014-07-22 ADA-ES, Inc. Air treatment process for dilute phase injection of dry alkaline materials
US8845986B2 (en) 2011-05-13 2014-09-30 ADA-ES, Inc. Process to reduce emissions of nitrogen oxides and mercury from coal-fired boilers
US9017452B2 (en) 2011-11-14 2015-04-28 ADA-ES, Inc. System and method for dense phase sorbent injection
US8883099B2 (en) 2012-04-11 2014-11-11 ADA-ES, Inc. Control of wet scrubber oxidation inhibitor and byproduct recovery
US8974756B2 (en) 2012-07-25 2015-03-10 ADA-ES, Inc. Process to enhance mixing of dry sorbents and flue gas for air pollution control
US9957454B2 (en) 2012-08-10 2018-05-01 ADA-ES, Inc. Method and additive for controlling nitrogen oxide emissions
US10350545B2 (en) 2014-11-25 2019-07-16 ADA-ES, Inc. Low pressure drop static mixing system
JP6263658B1 (ja) * 2017-03-24 2018-01-17 佐竹化学機械工業株式会社 撹拌装置
JP6518315B2 (ja) * 2017-12-18 2019-05-22 佐竹化学機械工業株式会社 液体の蒸発及び濃縮用の撹拌装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191211028A (en) * 1912-05-09 1912-11-07 Arthur Edwin Boardman Improvements in Apparatus for Drying Manure, Tan Waste and other Materials.
GB191507198A (en) * 1915-05-13 1916-04-13 Liquid Purification Company Lt Improvements in Rotary Driving Machines.
US1558546A (en) * 1922-03-02 1925-10-27 Paul R Mccampbell Process and apparatus for treating reclaimed rubber
US2138240A (en) * 1936-12-30 1938-11-29 Friedrich Haas Kommanditgesell Drying apparatus
FR993243A (fr) * 1949-06-14 1951-10-29 Dispositif de séchage
DE1213385C2 (de) * 1960-01-16 1976-01-15 Draiswerke Gmbh, 6800 Mannheim Mischmaschine
GB1174072A (en) * 1967-02-01 1969-12-10 Okawara Siesakusho Kk Drying apparatus comprising a device for Burning and Deodorizing Odorous Gases
US3617225A (en) * 1967-06-22 1971-11-02 Vickers Zimmer Ag Polycondensation apparatus
CH535413A (de) * 1971-07-01 1973-03-31 Luwa Ag Vorrichtung zum Trocknen eines fliessfähigen Stoffes
DE2724281A1 (de) * 1977-05-28 1978-11-30 Vasily Vasilievitsch Mamistov Trockner fuer schuettgueter

Also Published As

Publication number Publication date
DE3062161D1 (en) 1983-04-07
JPS55149603A (en) 1980-11-21
DE2911549A1 (de) 1980-09-25
JPS63133301U (fr) 1988-08-31
US4420892A (en) 1983-12-20
DE2911549C2 (de) 1981-10-01
EP0017040A1 (fr) 1980-10-15

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