US3625273A - Thin film apparatus having a two-part heat treatment chamber - Google Patents

Thin film apparatus having a two-part heat treatment chamber Download PDF

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Publication number
US3625273A
US3625273A US875961A US3625273DA US3625273A US 3625273 A US3625273 A US 3625273A US 875961 A US875961 A US 875961A US 3625273D A US3625273D A US 3625273DA US 3625273 A US3625273 A US 3625273A
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compartment portion
compartment
thin film
connector member
film apparatus
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Expired - Lifetime
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US875961A
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English (en)
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Albert Buschor
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Luwa Ltd
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Luwa Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
    • B01D1/222—In rotating vessels; vessels with movable parts
    • B01D1/223—In rotating vessels; vessels with movable parts containing a rotor
    • B01D1/225—In rotating vessels; vessels with movable parts containing a rotor with blades or scrapers

Definitions

  • a thin film apparatus for converting materials suspended in a liquid medium into a powdery form, comprising a pair of substantially cylindrical heat treatment chambers having their axes disposed at an angle to each other, each of the chambers having rotatably mounted therein an agitating rotor or spreader member.
  • the first or upper chamber is disposed substantially vertically and communicates with the lower or second 260/555 chamber by means of a connector member; the second 23/285 chamber may be horizontal or inclined towards its discharge end either upwardly or downwardly from the first chamber.
  • Thin film apparatuses having such multiple portion, substantially cylindrical heat treatment chambers are already known in the art, in which the multiple heat treatment chamber portions are disposed in substantially vertical fashion below one another. While the upper or first chamber portion isusually used as an evaporation or vaporization zone, the succeeding or lower chamber portion, in relation to the direction of flow of liquid, is used as a drier zone.
  • a rotor is provided disposed substantially coaxially to the chamber portions and rotatably supported at the extreme ends of the treatment chamber.
  • Rigid spreader elements extend substantially axially as well as radially upon the rotor, and distribute the liquid to be treated, containing dissolved or dispersed materials therein, in a thin film or layer upon the inner wall of each of the chamber portions.
  • the liquid-thus flows under the influence of gravity towards the bottom and towards the outlet connector member which is disposed at the bottom end of the second treatment chamber.
  • the liquid While passing through the first chamber portion, a substantial proportion of the liquid evaporates, whereby the materials dissolved or dispersed therein are thickened into a pastelike consistency.
  • a powderliquid mixture which, on the one hand, cannot be referred to as a liquid, but which, on the other hand, is not sufficiently dry to be termed a dried powder either.
  • the size range of the powder particles can vary from several microns to several millimeters.
  • a horizontally disposed, conically shaped treatment chamber which can be heated, exhibiting a rotor which is arranged substantially coaxially to the chamber.
  • the liquid medium to be treated is generally fed into the end of the conical treatment chamber having the smaller diameter.
  • the material flows under the effect of centrifugal forces which are produced by rotation of the rotor blades, as well as by the force of gravity which acts upon the liquid, towards the material outlet port which is disposed at the opposite or larger diameter end of the treatment chamber.
  • T his treatment chamber knownto the art, isencumbered with the disadvantage that the liquid medium to be treated, which contains the material to be converted into powder form, is partially mixed with the dried powder particles when fed into the treatment chamber, and therefore it becomes difficult to precisely regulate the final moisture content in the powder to be obtained.
  • a thin film apparatus having a twopart heat treatment chamber or compartment in which the two portions of the compartment are disposed at an angle to each other.
  • the first or upper chamber forming an evaporation zone
  • the second or lower chamber forming a drying zone, by means of a connectormember.
  • Each-of the portions has supported therein rotor means for spreading the liquid and paste therein.
  • the axis of the first compartment portion intersects that of the second compartment portion at an angle less than and the rotors in each of the compartment portions can be driven if desired at varying rotational speeds.
  • FIG. 1 is a vertical sectional view of a first embodiment of a thin film apparatus constructed according to the invention, in which the second or lower chamber portion is disposed at a right angle to the first chamber portion;
  • FIG. 2 is a vertical section view of a second embodiment of the invention, in which the second portion is inclined downwardly from the first portion;
  • FIG. 3 is a vertical sectional view of a third embodiment of the invention in which the second chamber portion is inclined upwardly from the first portion.
  • a thin film evaporator having a two-part, axially symmetrical heat treatment compartment.
  • This heat treatment compartment comprises a first compartment portion 12, which serves as an evaporation zone, and a second compartment portion 14 disposed below the first portion I2, and having a smaller diameter than first portion 12, and which serves as a drying zone.
  • the axes of the two compartment portions 12 and 14 intersect each other in this embodiment at substantially a right angle, in which case the axis of the first compartment portion 12 is disposed substantially vertically, and that of the second portion 14 is disposed substantially horizontally.
  • first portion 12 in the immediate vicinity of the end of second portion 14 adjacent first portion 12, there is provided an opening 16 in second portion 14 which receives therein a connector member 18 which provides fluid communication between the two portions.
  • the axis of member 18 is disposed in such fashion that it is substantially coaxial with first compartment portion 12.
  • a flange member 20 connects the end of compartment portion 12 facing compartment portion 14, with the connector member 18.
  • the opposite ends of the second compartment portion 14 are closed by cover members 68 and 70.
  • a vapor chamber 22 At the upper end of compartment portion 12 is disposed a vapor chamber 22. This chamber is separated from the compartment portion 12 by a platelike dividing wall or partition member 24 having a central opening 26 therein.
  • the vapor compartment 22 is provided with a vapor outlet port 28. Directly below the vapor compartment 22, in the jacket of the first compartment portion 12, there is disposed an inlet port 30 which is provided for the infeed of the liquid to be treated.
  • First and second compartment portions 12 and 14 are each surrounded by a heatable jacket 32 and 34, respectively.
  • An inlet port 36 in the heating jacket 32, as well as an inlet port 38 in the heating jacket 34 serve for the introduction of a suitable heat carrying medium.
  • An outlet port 40 in the heating jacket 32, as well as an outlet port 42 in the heating jacket 34 serve to carry away or discharge the heat carrying medium which is used in the heating jackets 32 and 34.
  • a rotor member 44 Coaxially to the first compartment portion 12 is disposed a rotor member 44 which is rotatably supported within suitable bearings 48 and 50 upon a shaft 46.
  • Upper bearing 48 is disposed within a cover member 49 which closes ofi the upper end of the vapor compartment 22, and bearing member 50 is provided in the vicinity of the lower end of the first compartment portion 12 facing the second compartment portion 14.
  • Rotor member 44 has secured thereto a plurality of spreader elements 45, which extend axially and also radially substantially up to the inner wall of the first compartment portion 12.
  • the shaft 46 and the spreader elements 45 are driveably coupled with a motor 52 which is disposed upon the cover member 49 of the vapor compartment 22.
  • a rotor member 54 which comprises a central pipe or tube member 56 upon which are disposed a plurality of spreader elements 58 which are inclined with respect to the axis 57 of the pipe 56.
  • the inclination of the edges of the spreader elements 58 with respect to the pipe axis 57 is adjustably by pivoting the respective elements by any suitable means.
  • At both ends of the pipe member 56 there are attached respective shaft stubs 60 and 62 which are rotatably supported within bearings members 64 and 66. These bearings 64 and 66 are in turn secured to cover members 68 and 70 which close ofi compartment portion 14.
  • Rotor member 54 is driveably connected with a motor means 72 by means of shaft stub 60, or alternately the motor means may be mounted on the opposite end of the second portion and secured to shaft stub 62.
  • the heating jackets 32 and 34 are heated to a desired treatment temperature by introducing a suitable heat carrying medium, which in turn heats compartment portions 12 and 14.
  • the liquid to be treated containing dissolved or dispersed materials therein, is fed in through inlet port 30 into the first compartment portion 12, which functions as an evaporation zone, where it is engaged by the spreader elements 45 which are driven by motor means 52, and is spread in a thin film or layer upon the inner wall of the first compartment portion 12.
  • the liquid flows under the influence of gravity downwardly along the treatment wall of compartment portion 12 towards connector member 18.
  • the liquid is, while passing through the first compartment portion 12, evaporated to such a degree that the materials contained in the liquid reach the connector member 18 in the form of a pastelike consistency.
  • the paste is then fed into connector member 18, and falls by virtue of its own weight into the second compartment portion 14 which serves as a drying zone.
  • the paste is spread in a thin film upon the inner wall of compartment portion 14 by the spreader elements 58 which are driven by motor 72.
  • the spreader elements 58 as described above, are inclined with respect to the rotor axis in such a manner that they deliver or convey the paste or the dried powder towards the outlet port 74.
  • the paste is conducted through the second compartment portion 14 at a suitable speed necessary to dry the paste to a desired moisture content.
  • FIG. 2 there is shown a second embodiment of the evaporator according to this invention having a similar twopart treatment chamber. While the arrangement of the first compartment portion 76 corresponds substantially to the first compartment portion 12 of FIG. 1, the second compartment portion 78 is, in this embodiment, disposed in inclined fashion with respect to the first portion. In this case the end of the compartment portion 78 which faces away from the connector member 80 is inclined towards the bottom. Thereby, the paste which enters into the second compartment portion 78 flows under the influence of gravity, without the necessity for mechanical conveying means, towards outlet port 82. Therefore, the sole function of the rotor member 84, which is disposed coaxially within compartment portion 78 and is driven by motor means 86, is to spread the powder upon the inner wall of this compartment portion.
  • rotor member 84 with adjustably vane portions which can, as desired, bring about an acceleration or retardation of the through flow of the powder.
  • FIG. 3 there is dipicted yet a further embodiment of the thin film apparatus according to this invention in which the liquid to be treated and/or the materials contained therein, can be treated in the second compartment portion for a particularly long period of time.
  • the second compartment portion is inclined upwardly from connector member 92 which connects the two compartment portions, so that outlet port 94 of the second compartment portion 90 lies above the connector member 92.
  • rotor member 96 which is disposed coaxially within the second compartment portion 90 and is driven by motor means 98, is, for example, provided with helical spreader elements, forming a screw conveyor, which continuously transport the material upwardly towards outlet port 94.
  • motor means 98 for example, provided with helical spreader elements, forming a screw conveyor, which continuously transport the material upwardly towards outlet port 94.
  • the rotors disposed within the respective compartment portions may be adjusted to operate at different rotational speeds. This is important for allowing the adjustment, during the treatment of products with difierent properties, of the operational conditions to the given product characteristics desired.
  • the inventive arrangement of the heat treatment chambers of the thin film apparatus possesses several advantages. It is, for example, possible when the second compartment portion is in a horizontal position to exactly control each phase of the treatment of the materials contained in a liquid, and thereby to adjust the final moisture content of the powder to the desired conditions. Furthermore, the invention ofi'ers the advantage of a material saving construction method. Corresponding to the amount of liquid evaporated in the first compartment portion or of the reduction of volume achieved thereby, the diameter of the second compartment portion may be kept smaller than than of the first compartment portion without reducing the through quantity of the fluid to be treated.
  • the two compartment portions towards one another in such manner that their axes, when the first compartment portion is disposed substantially vertically, include an angle in the range of 70 to 1 In this case, the angle range of 85 to 95 has proven to be especially advantageous.
  • the outlet end of the second compartment portion is inclined downwardly from the first compartment portion, the paste passing through said portion flows to the outlet port through the efiect of gravity and without the need for mechanical conveying means.
  • the rotor of this compartment portion therefore, has only the function of spreading the formed powder upon the inner wall of the compartment.
  • the inclination of the two compartment portions towards one another can also be carried out in such fashion that the second compartment portion is inclined upwardly away from the first compartment portion.
  • the residence time of the paste in the second compartmentportion is determined by the rotational speed of the, for example, screw conveyor means, so that the residence time can be varied within a wide range.
  • the residence time of the powder in the second compartment portion can be changed, as described above, by adjusting the inclination of this compartment portion.
  • a thin film apparatus for converting materials which 'are dissolved or dispersed within a liquid into powder form comprising a first compartment portion forming an evaporation zone, a second compartment portion communicating with said first compartment portion and serving as a drying zone, said first compartment portion and said second compartment portion collectively defining a two-part heat treatment compartment arrangement, said second compartment portion following said first compartment portion in the direction of flow of said liquid, each of said compartment portions having respective treatment wall portions and a rotor member disposed coaxially therein, each of said rotor members having a plurality of spreader elements secured thereto, said spreader elements of each rotor member cooperating with said treatment wall portions of the associated compartment portion for spreading a thin film of the material undergoing treatment on the treatment wall portions of the associated compartment, said first compartment portion and said second compartment portion each providing a respective thin film treatment device, a connector member connecting said first compartment portion to said second compartment portion for unobstructed flow of material from said first compartment portion to said second compartment portion, said connector member providing a transition zone between

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
US875961A 1968-11-15 1969-11-12 Thin film apparatus having a two-part heat treatment chamber Expired - Lifetime US3625273A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1706668A CH486681A (de) 1968-11-15 1968-11-15 Dünnschichtapparat mit einer zweiteiligen Wärmebehandlungskammer

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US3625273A true US3625273A (en) 1971-12-07

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US (1) US3625273A (de)
AT (1) AT295476B (de)
CH (1) CH486681A (de)
DE (1) DE1952199C3 (de)
FR (1) FR2023387A1 (de)
GB (1) GB1273248A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5170559A (en) * 1974-12-16 1976-06-18 Ulvac Corp Surariitono renzokukansosochi
US4154798A (en) * 1976-04-09 1979-05-15 Luwa Ag Apparatus for producing a homogeneous, chemically reactive system
US4222823A (en) * 1975-09-10 1980-09-16 Chemische Werke Huis Aktiengesellschaft Method for processing chlorinated hydrocarbon residues
FR2463157A1 (fr) * 1978-03-13 1981-02-20 Owens Illinois Inc Procede de fabrication d'un terephtalate de polyethylene ameliore et stable
US4894117A (en) * 1988-04-28 1990-01-16 Colgate-Palmolive Company Process for manufacturing high bulk density particulate fabric softening synthetic anionic organic detergent compositions
WO2000041793A1 (fr) * 1999-01-14 2000-07-20 Sirven Echangeur de chaleur, notamment pour le prechauffage de lisier
US20060169416A1 (en) * 2001-12-20 2006-08-03 Process Development Services, Inc. Apparatus and method for removing volatile components from viscous liquids
US20130224104A1 (en) * 2010-09-03 2013-08-29 Greg Naterer Heat Exchanger Using Non-Pure Water for Steam Generation
US8673226B2 (en) 2011-05-06 2014-03-18 Carmeuse Lime, Inc. Apparatus and method for forming hydrated lime

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH621862A5 (de) * 1977-03-30 1981-02-27 Luwa Ag
AT390673B (de) * 1985-12-05 1990-06-11 Oesterr Forsch Seibersdorf Verfahren zur steuerung der rotordrehzahl fuer duennschichtbehandlungsanlagen und rotorsteuerung
US4980181A (en) * 1989-01-11 1990-12-25 Nestec S.A. Chocolate coated beverage mixes

Citations (7)

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Publication number Priority date Publication date Assignee Title
US2039162A (en) * 1932-08-16 1936-04-28 Gerstenberg Aage Kneading machine for margarine and the like
US2458068A (en) * 1943-11-25 1949-01-04 Welding Engineers System for the treatment of material
US2933526A (en) * 1956-02-25 1960-04-19 Lonza Electric & Chem Works Process for the manufacture of urea in granular form
US3113843A (en) * 1959-01-27 1963-12-10 Du Pont Apparatus for separating a vapor from a viscous material such as molten polymer
US3244688A (en) * 1962-04-16 1966-04-05 Phillips Petroleum Co Process for processing of polymers
US3357478A (en) * 1966-12-05 1967-12-12 Artisan Ind Thin film processing apparatus
US3443622A (en) * 1968-04-02 1969-05-13 Artisan Ind Multi-zone processing apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2039162A (en) * 1932-08-16 1936-04-28 Gerstenberg Aage Kneading machine for margarine and the like
US2458068A (en) * 1943-11-25 1949-01-04 Welding Engineers System for the treatment of material
US2933526A (en) * 1956-02-25 1960-04-19 Lonza Electric & Chem Works Process for the manufacture of urea in granular form
US3113843A (en) * 1959-01-27 1963-12-10 Du Pont Apparatus for separating a vapor from a viscous material such as molten polymer
US3244688A (en) * 1962-04-16 1966-04-05 Phillips Petroleum Co Process for processing of polymers
US3357478A (en) * 1966-12-05 1967-12-12 Artisan Ind Thin film processing apparatus
US3443622A (en) * 1968-04-02 1969-05-13 Artisan Ind Multi-zone processing apparatus

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
1156096 2E *
2755293 25 *
3067462 2E *
Ger. 349337 12X, 17VS *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5170559A (en) * 1974-12-16 1976-06-18 Ulvac Corp Surariitono renzokukansosochi
US4222823A (en) * 1975-09-10 1980-09-16 Chemische Werke Huis Aktiengesellschaft Method for processing chlorinated hydrocarbon residues
US4154798A (en) * 1976-04-09 1979-05-15 Luwa Ag Apparatus for producing a homogeneous, chemically reactive system
FR2463157A1 (fr) * 1978-03-13 1981-02-20 Owens Illinois Inc Procede de fabrication d'un terephtalate de polyethylene ameliore et stable
US4894117A (en) * 1988-04-28 1990-01-16 Colgate-Palmolive Company Process for manufacturing high bulk density particulate fabric softening synthetic anionic organic detergent compositions
FR2788590A1 (fr) * 1999-01-14 2000-07-21 Sirven Echangeur de chaleur, notamment pour le prechauffage de lisier
WO2000041793A1 (fr) * 1999-01-14 2000-07-20 Sirven Echangeur de chaleur, notamment pour le prechauffage de lisier
US6513580B1 (en) 1999-01-14 2003-02-04 Sirven Heat exchanger, in particular for preheating liquid manure
US20060169416A1 (en) * 2001-12-20 2006-08-03 Process Development Services, Inc. Apparatus and method for removing volatile components from viscous liquids
US7682484B2 (en) * 2001-12-20 2010-03-23 Process Development Services, Inc. Apparatus and method for removing volatile components from viscous liquids
US20130224104A1 (en) * 2010-09-03 2013-08-29 Greg Naterer Heat Exchanger Using Non-Pure Water for Steam Generation
US11149940B2 (en) * 2010-09-03 2021-10-19 Greg Naterer Heat exchanger using non-pure water for steam generation
US8673226B2 (en) 2011-05-06 2014-03-18 Carmeuse Lime, Inc. Apparatus and method for forming hydrated lime

Also Published As

Publication number Publication date
CH486681A (de) 1970-02-28
AT295476B (de) 1972-01-10
DE1952199B2 (de) 1977-10-27
FR2023387A1 (de) 1970-08-21
GB1273248A (en) 1972-05-03
DE1952199A1 (de) 1970-06-04
DE1952199C3 (de) 1978-07-13

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