EP0569558A1 - Evaporating plant for processing sludges. - Google Patents

Evaporating plant for processing sludges.

Info

Publication number
EP0569558A1
EP0569558A1 EP92918423A EP92918423A EP0569558A1 EP 0569558 A1 EP0569558 A1 EP 0569558A1 EP 92918423 A EP92918423 A EP 92918423A EP 92918423 A EP92918423 A EP 92918423A EP 0569558 A1 EP0569558 A1 EP 0569558A1
Authority
EP
European Patent Office
Prior art keywords
interior
wall
product
cutting zone
evaporator device
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.)
Granted
Application number
EP92918423A
Other languages
German (de)
French (fr)
Other versions
EP0569558B1 (en
Inventor
Josef Egger
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.)
Buss AG
Original Assignee
Buss 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
Application filed by Buss AG filed Critical Buss AG
Publication of EP0569558A1 publication Critical patent/EP0569558A1/en
Application granted granted Critical
Publication of EP0569558B1 publication Critical patent/EP0569558B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F26B17/18—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 relates to an evaporator device for
  • Heat treatment in particular for drying sludge, with a heatable, hollow cylindrical, approximately horizontally oriented evaporator body which has a product inlet at one end and a product outlet at the other end and in which the product acts on it
  • a rotor which is provided with essentially radially aligned vanes and can be driven from the outside.
  • moist goods in particular sludges from waste water systems
  • moist goods in particular sludges from waste water systems
  • the sludge is applied in the form of a thin product film on the heated inner wall of the evaporator body through the blades of the rotor rotating on the inside, the product being continuously conveyed through the evaporator body through the blades of the rotor and an at least partially dry at the product outlet Granules are produced.
  • the problem with drying is that the material to be dried, which is introduced into the product inlet as a pumpable product, passes through a tough intermediate phase with decreasing water content, which leads to lump formation. These coarse aglomerates are following drying phase from the fast rotating
  • the invention is based on the object of designing an evaporator device of the type described at the outset in such a way that the formation of lumps in the critical zones is prevented and granules which are as uniform as possible are obtained as the end product.
  • the wall of the interior at least in the area in front of the product outlet, is provided with at least one cutting zone which extends essentially in the longitudinal direction of the interior and which interrupts the circular contour of the interior wall cross-section.
  • the cutting zone is formed by at least one depression, in particular a groove-shaped depression, of the inner wall. The through a trough-shaped depression
  • the depression can be formed in the form of a continuous channel or groove or in the form of a plurality of separate depressions which follow one another in the longitudinal direction of the interior.
  • the cutting zone is formed by at least one projection, in particular a web-shaped projection, of the inner wall.
  • a web-shaped projection With such a web-shaped projection, the normal gap between the wing edge and the inner wall of the evaporator body is slightly reduced.
  • a larger lump rolling in the area of the wing edge is held by the projection, so that the wing edge can break open the lump.
  • a plurality of linear cutting zones spaced approximately parallel to one another are provided.
  • a further embodiment has proven to be particularly favorable in which the cutting zones, based on the direction of rotation of the rotor, are arranged at least in the wall area covered by the upward-rotating blades. The "height" of the cutting zones is only a few millimeters in order to ensure that the product to be dried continues to be conveyed to the product outlet in a thin layer on the heated inner wall of the evaporator body.
  • Fig. 1 shows a longitudinal section through a
  • Fig. 2 shows a cross section. the line II-II in Fig. 1, but with an illustration of the rotor.
  • the evaporator body 1 of a so-called evaporator device to be operated as a thin-film dryer, shown in a longitudinal section in FIG. 1, essentially consists of a cylindrical tube 2, which in the exemplary embodiment shown is composed of two tube sections. On the outside, the two pipe sections 2 are each surrounded at a distance by a jacket pipe 3, through which a heating chamber 4 is delimited, into which heating steam is introduced via a feed line 5 and the condensate that forms can be drawn off via a drain line 6.
  • the product to be dried is introduced into the interior 8 of the evaporator body in a pumpable, puncture-resistant or crumbly consistency via a product inlet 7.
  • the rotor has, at least in the inlet area, vane sections which are positioned at an angle to the longitudinal axis and thus act as conveying vanes.
  • One third of the total length begins under the influence of the heating medium, whereby the interior of the evaporator body can be kept slightly under vacuum to improve the evaporation performance, so that the mass introduced passes through its so-called tough phase.
  • the heated inner wall 11 Through contact with the heated inner wall 11, larger lumps with a rapidly drying outer skin and still wet filling can form, which roll on the smooth inner wall and thus either come out as lumps or are broken up in the end region by the rotor blades , whereby undesirable amounts of fine grain and dust form.
  • the inner wall of the evaporator body 1 is designed as a cutting zone 13 up to the product outlet 12.
  • the cutting zone is formed by a plurality of linear web-shaped projections 14 which protrude into the interior at a height of only a few millimeters.
  • the height of the projections can be, for example, 3 mm.
  • the projections arranged at a distance of, for example, 100 mm from one another are now like the sectional illustration in FIG. 2 reveals, based on the direction of rotation of the rotor
  • the cutting zones can also be formed by corresponding outward-pointing, preferably channel-shaped depressions in the inner wall 11.
  • Such lumps in the wall also hold larger clumps on the wings, which are larger in diameter than the normal gap between the wing edge and the inner wall, from the edge of the channel-shaped depression f, so that here again the wings edge can break up the lump.
  • a trough-shaped depression or a web-shaped projection is arranged as a cutting zone on the inner wall.
  • the cutting zones can, as shown, be aligned axially parallel or, at a small angle, measured in relation to the longitudinal axis, can be aligned in a helical line. Neither in a trough-shaped version nor in a web-shaped version, it is necessary that the cutting zones run over the full length, but they can be formed in a linear arrangement, by punctiform depressions or punctiform or stegför-shaped projections of short length.
  • projections these can be applied, for example, by cams, combs, pins or also by welding beads by means of build-up welding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Sludge (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

An evaporation device for drying sludges includes a heatable, hollow cylindrical, approximately horizontally oriented evaporator provided at one end with a product inlet and at the other end with a product outlet while in its product-charged interior an essentially radially oriented, externally driven rotor is disposed which is equipped with vanes that extend essentially over the length of the evaporator. At least in the region upstream of the product outlet, the walls of the interior are provided with at least one cutting zone that extends essentially in the longitudinal direction of the interior and interrupts the circular outline of the cross section of the interior.

Description

Bezeichnung: Verdampfereinrichtung zur Behandlung vonName: Evaporator device for the treatment of
SchlämmenSlurries
Beschreibung:Description:
Die Erfindung betrifft eine Verdampfereinrichtung zurThe invention relates to an evaporator device for
Wärmebehandlung, insbesondere zur Trocknung von Schlämmen, mit einem beheizbaren, hohlzylindrischen, in etwa horizon¬ tal ausgerichteten Verdampferkörpe , der an einem Ende einen Produkteinlaß und am anderen Ende einen Produktaus- laß aufweist und in dessen vom Produkt beaufschlagtenHeat treatment, in particular for drying sludge, with a heatable, hollow cylindrical, approximately horizontally oriented evaporator body which has a product inlet at one end and a product outlet at the other end and in which the product acts on it
Innenraum ein mit im wesentlichen radial ausgerichteten Flügeln versehener, von außen antreibbarer Rotor angeord¬ net ist.Interior is arranged a rotor which is provided with essentially radially aligned vanes and can be driven from the outside.
Mit Hilfe einer derartigen Verdampfereinrichtung werden seit Jahren Feuchtgüter, insbesondere Schlämme aus Abwas¬ seranlagen getrocknet. Durch die Flügel des innen umlaufen¬ den Rotors werden die Schlämme in Form eines dünnen Pro¬ duktfilms auf der beheizten Innenwandung des Verdampfer- körpers aufgetragen, wobei durch die Flügel des Rotors das Produkt kontinuierlich durch den Verdampferkörper hindurchgefördert wird und am Produktauslaß ein zumindest teilweise trockenes Granulat anfällt. Bei vielen derartiger Schlämme besteht bei der Trocknung jedoch das Problem, daß das als pumpfähiges Produkt in den Produkteinlaß eingeführte zu trocknende Gut mit abnehmendem Wassergehalt eine zähe Zwischenphase durchläuft, die zu Klumpenbildung führt. Diese groben Aglomerate werden in der weiter- folgenden Trocknungsphase von den schnellumlaufendenWith the aid of such an evaporator device, moist goods, in particular sludges from waste water systems, have been dried for years. The sludge is applied in the form of a thin product film on the heated inner wall of the evaporator body through the blades of the rotor rotating on the inside, the product being continuously conveyed through the evaporator body through the blades of the rotor and an at least partially dry at the product outlet Granules are produced. With many such sludges, however, the problem with drying is that the material to be dried, which is introduced into the product inlet as a pumpable product, passes through a tough intermediate phase with decreasing water content, which leads to lump formation. These coarse aglomerates are following drying phase from the fast rotating
Flügeln des Rotors zwar weitgehend wieder zerschlagen. Hierbei entsteht jedoch ein großer Feinkorn- bzw. Staub¬ anteil. Des weiteren ist der Wärmeübergang auf das zu trocknende, in groben Klumpen vorhandene Produkt durch ihre geringe Kontaktoberfläche zur beheizten Innenwandung erheblich reduziert. Die entstehenden groben Klumpen sind hierbei so aufgebaut, daß sie eine relativ dünne trockene Mantelfläche besitzen, die eine noch verhältnis- mäßig nasse Produktmenge umschließt. Gelangen derartige Klumpen in den Produktauslaß, können in den nachgeschal¬ teten Einrichtungen beim Aufplatzen -der Klumpen Verkle¬ bungen, Anbackungen etc. auftreten.Mostly smashed the rotor blades again. However, this results in a large proportion of fine grain or dust. Furthermore, the heat transfer to the product to be dried, which is present in coarse lumps, is considerably reduced due to its small contact surface with the heated inner wall. The resulting coarse lumps are constructed in such a way that they have a relatively thin, dry outer surface which encloses a still relatively wet amount of product. If such lumps get into the product outlet, sticking, caking, etc. can occur in the downstream devices when the lumps burst open.
Der Erfindung liegt nun die Aufgabe zugrunde, eine Ver¬ dampfereinrichtung der eingangs bezeichneten Art so aus¬ zubilden, daß die Klumpenbildung in den kritischen Zonen unterbunden und ein möglichst uniformes Granulat als Endprodukt erhalten wird.The invention is based on the object of designing an evaporator device of the type described at the outset in such a way that the formation of lumps in the critical zones is prevented and granules which are as uniform as possible are obtained as the end product.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß die Wandung des Innenraumes zumindest im Bereich vor dem Produktauslaß mit wenigstens einer sich im wesent¬ lichen in Innenraumlängsrichtung erstreckenden, die Kreis- kontur des Innenrau querSchnitts unterbrechenden Schneid¬ zone versehen ist. Überraschenderweise hat sich gezeigt, daß bereits die Entstehung grober Klumpen vermieden wird, wenn in etwa beginnend im Bereich der zähen Phase die glatte Kreis- bzw. Zylinderkontur der Innenwandung uήter- brochen ist. Hierdurch werden sich bildende gröbere Klumpen, die in ihrer Dicke den schmalen Spalt zwischen den Kanten der Rotorflügel und der Innenwandung des Verdampferkörpers übersteigen, in ihrer Bewegung festgehalten und hierbei von den Flügelkanten aufgebrochen. Damit ist gewährleistet, daß nur Granulate in einer Korngröße entstehen können, wie sie durch den Spalt zwischen der Flügelkante und dem zylindrischen Teil der Innenwandung des Verdamp¬ ferkörpers vorgegeben ist. 1 In einer Ausgestaltung der Erfindung ist vorgesehen, daß die Schneidzone durch wenigstens eine Vertiefung, insbesondere rinnenförmige Vertiefung, der Innenwandung gebildet ist. Die durch eine rinnenförmige VertiefungThis object is achieved according to the invention in that the wall of the interior, at least in the area in front of the product outlet, is provided with at least one cutting zone which extends essentially in the longitudinal direction of the interior and which interrupts the circular contour of the interior wall cross-section. Surprisingly, it has been shown that the formation of coarse lumps is already avoided if the smooth circular or cylindrical contour of the inner wall is broken, starting approximately in the area of the tough phase. As a result, coarser clumps which form and which exceed the narrow gap between the edges of the rotor blades and the inner wall of the evaporator body are held in their movement and thereby broken open by the wing edges. This ensures that only granules with a grain size can be produced, as is specified by the gap between the wing edge and the cylindrical part of the inner wall of the evaporator body. 1 In one embodiment of the invention it is provided that the cutting zone is formed by at least one depression, in particular a groove-shaped depression, of the inner wall. The through a trough-shaped depression
5 der Innenwandung gebildete Schneidzone, die zu einer5 of the inner wall formed cutting zone, which leads to a
'*> Vergrößerung des Abstandes zwischen der Flügelaußenkante und der Zylinderwandung führt, hat zur Folge, daß im Kantenbereich der Flügel abrollende Klumpen mit größerem Durchmesser als der normale Spaltabstand zwischen Flügel- 10 kante und zylindrischer Wandung eingeklemmt und hierbei aufgebrochen werden. Die Vertiefung kann hierbei in Form einer durchgehenden Rinne oder Rille oder aber in Form von mehreren, in Innenraumlangsrichtung aufeinanderfolgende abgesetzte Einzelvertiefungen gebildet werden.'*> Increasing the distance between the outer edge of the wing and the cylinder wall has the result that lumps rolling off with larger diameters than the normal gap distance between the edge of the wing and the cylindrical wall are pinched in the edge region of the wing and are broken open in the process. The depression can be formed in the form of a continuous channel or groove or in the form of a plurality of separate depressions which follow one another in the longitudinal direction of the interior.
1515
In einer anderen Ausgestaltung der Erfindung ist vorgesehen, daß die Schneidzone durch wenigstens einen Vorsprung, insbesondere einen stegförmigen Vorsprung, der Innenwand gebildet ist. Durch einen derartigen stegförmigen Vorsprung wird der normale Spalt zwischen der Flügelkante und der Innenwandung des Verdampferkörpers geringfügig verkleinert. Auch hier wird ein im Bereich der Flügelkante abrollender größerer Klumpen vom Vorsprung festgehalten, so daß die Flügelkante den Klumpen aufbrechen kann.In another embodiment of the invention it is provided that the cutting zone is formed by at least one projection, in particular a web-shaped projection, of the inner wall. With such a web-shaped projection, the normal gap between the wing edge and the inner wall of the evaporator body is slightly reduced. Here too, a larger lump rolling in the area of the wing edge is held by the projection, so that the wing edge can break open the lump.
2525
Sowohl für eine durch Vertiefungen als auch für eine durch Vorsprünge gebildete Schneidzone hat sich nun über¬ raschenderweise herausgestellt, daß sich weder die die Schneidzone bildende Vertiefung noch der Bereich vorSurprisingly, both for a cutting zone formed by depressions and for a cutting zone formed by projections, it has now been found that neither the depression forming the cutting zone nor the region is present
30 oder hinter einer stegförmig ausgebildeten Schneidzone mit Produkt zusetzt. Dies ist vermutlich darauf zurückzu¬ führen, daß außer den in Umfangsrichtung über die Flügel auf das Produkt wirkenden Kräfte zusätzlich auch in Durch¬ laufrichtung auf das Produkt einwirkende Kräfte vorhanden30 or behind a web-shaped cutting zone with product. This is presumably due to the fact that in addition to the forces acting on the product in the circumferential direction via the wings, there are also forces acting on the product in the direction of passage
35 sind, die auch im Bereich der Schneidzone das Produkt in Längsrichtung weiterschieben, so daß hier Ablagerungen und/oder Anbackungen vermieden sind. In einer bevorzugten Ausgestaltung der Erfindung ist hierbei vorgesehen, daß mehrere mit Abstand in etwa parallel zueinander verlaufende linienförmige Schneidzonen vorge¬ sehen sind. Als besonders günstig hat sich hierbei eine weitere Ausgestaltung gezeigt, bei der die Schneidzonen, bezogen auf die Drehrichtung des Rotors, zumindest in dem von den aufwärtsdrehenden Flügeln überstrichenen Wandungsbereich angeordnet ist. Die "Höhe" der Schneid¬ zonen beträgt hierbei nur wenige Millimeter, um zu gewähr- leisten, daß das zu trocknende Produkt weiterhin in nur dünner Schicht auf der beheizten Innenwandung des Verdamp¬ ferkörpers zum Produktauslaß gefördert wird.35, which also push the product in the longitudinal direction in the region of the cutting zone, so that deposits and / or caking are avoided here. In a preferred embodiment of the invention it is provided here that a plurality of linear cutting zones spaced approximately parallel to one another are provided. A further embodiment has proven to be particularly favorable in which the cutting zones, based on the direction of rotation of the rotor, are arranged at least in the wall area covered by the upward-rotating blades. The "height" of the cutting zones is only a few millimeters in order to ensure that the product to be dried continues to be conveyed to the product outlet in a thin layer on the heated inner wall of the evaporator body.
Die Erfindung wird anhand schematischer Zeichnungen, eines Ausführungsbeispiels näher erläutert. Es zeigenThe invention is explained in more detail with reference to schematic drawings of an exemplary embodiment. Show it
Fig. 1 einen Längsschnitt durch einenFig. 1 shows a longitudinal section through a
Verdampferkörper, jedoch ohne Rotor,Evaporator body, but without rotor,
Fig. 2 einen Querschnitt gem. der Linie II-II in Fig. 1, jedoch mit Darstellung des Rotors.Fig. 2 shows a cross section. the line II-II in Fig. 1, but with an illustration of the rotor.
Der in Fig. 1 in einem Längsschnitt dargestellte Verdampfer- kδrper 1 einer sogenannten als Dünnschichttrockner zu betreibenden Verdampfereinrichtung besteht im wesentlichen aus einem zylindrischen Rohr 2, das beim dargestellten Ausführungsbeispiel aus zwei Rohrschüssen zusammengesetzt ist. Auf der Außenseite sind die beiden Rohrschüsse 2 jeweils mit Abstand von jeweils einem Mantelrohr 3 umgeben, durch das ein Heizraum 4 begrenzt wird, in den über jeweils eine Zuleitung 5 Heizdampf eingeleitet und über eine Ablaßleitung 6 das sich bildende Kondensat abgezogen werden kann.The evaporator body 1 of a so-called evaporator device to be operated as a thin-film dryer, shown in a longitudinal section in FIG. 1, essentially consists of a cylindrical tube 2, which in the exemplary embodiment shown is composed of two tube sections. On the outside, the two pipe sections 2 are each surrounded at a distance by a jacket pipe 3, through which a heating chamber 4 is delimited, into which heating steam is introduced via a feed line 5 and the condensate that forms can be drawn off via a drain line 6.
Das zu trocknende Produkt wird in pumpfähiger, stichfester oder auch krümeliger Konsistenz über einen Produkteinlaß 7 in den Innenraum 8 des Verdampferkörpers eingeführt. Durch den in Fig. 2 dargestellten Rotor 9, dessen Flügel 10 in geringem Abstand von der Innenwandung 11 des Ver¬ dampferkörpers 1, beispielsweise in einem Abstand von etwa 6 mm enden, wird das Produkt in einer entsprechend dünnen Schicht auf die Innenwandung 11 aufgetragen und hierbei in Richtung auf das andere Ende des Verdampferkör¬ pers gefördert. Der Rotor weist hierbei je nach Art des zu behandelnden Produktes zumindest im Einlaßbereich Flügelabschnitte auf, die unter einem Winkel zur Längsachse angestellt sind und damit als Förderflügel wirken.The product to be dried is introduced into the interior 8 of the evaporator body in a pumpable, puncture-resistant or crumbly consistency via a product inlet 7. The rotor 9 shown in FIG. 2, the blades 10 of which end at a short distance from the inner wall 11 of the evaporator body 1, for example at a distance of approximately 6 mm, applies the product in a correspondingly thin layer to the inner wall 11 and promoted in the direction of the other end of the evaporator body. Depending on the type of product to be treated, the rotor has, at least in the inlet area, vane sections which are positioned at an angle to the longitudinal axis and thus act as conveying vanes.
Nach dem Durchlaufen von etwa einem Viertel bis einemAfter going through about a quarter to one
Drittel der Gesamtlänge beginnt unter der Einwirkung des Heizmediums, wobei zur Verbesserung der Verdampfungs- leistung der Innenraum des Verdampferkörpers geringfügig unter Unterdruck gehalten werden kann, die eingeführte Masse ihre sogenannte zähe Phase zu durchlaufen. Über den Kontakt mit der aufgeheizten Innenwandung 11 können sich größere Klumpen mit rasch abtrocknender Außenhaut und noch nasser Füllung bilden, die auf der glatten Innen¬ wandung abrollen und so entweder als Klumpen mit zum Austrag gelangen oder aber im Endbereich durch die Rotor¬ flügel zerschlagen werden, wobei sich unerwünschte Feinkorn- und Staubmengen bilden.One third of the total length begins under the influence of the heating medium, whereby the interior of the evaporator body can be kept slightly under vacuum to improve the evaporation performance, so that the mass introduced passes through its so-called tough phase. Through contact with the heated inner wall 11, larger lumps with a rapidly drying outer skin and still wet filling can form, which roll on the smooth inner wall and thus either come out as lumps or are broken up in the end region by the rotor blades , whereby undesirable amounts of fine grain and dust form.
Um diese Klumpenbildung zu unterbinden, ist die Innenwandung des Verdampferkörpers 1, beginnend im Bereich der sogenann¬ ten zähen Phase, bis nahe zum Produktauslaß 12 als Schneid¬ zone 13 ausgebildet. Bei dem dargestellten Ausführungsbeispiel wird die Schneidzone durch mehrere linienförmig ausgebildete stegförmige Vorsprünge 14 gebildet, die in einer Höhe von nur wenigen Millimetern in den Innenraum vorragen. Bei einem lichten Abstand zwischen der Außenkante des Flügels 10 einerseits und der Innenwandung 11 des Verdampfer- körpers 1 andererseits von beispielsweise 6 mm kann die Höhe der Vorsprünge beispielsweise 3 mm betragen. Die im Abstand von beispielsweise 100 mm zueinander angeordneten Vorsprünge sind nun, wie die Schnittdarstellung in Fig. 2 erkennen läßt, bezogen auf die Drehrichtung des RotorIn order to prevent this lump formation, the inner wall of the evaporator body 1, starting in the region of the so-called tough phase, is designed as a cutting zone 13 up to the product outlet 12. In the exemplary embodiment shown, the cutting zone is formed by a plurality of linear web-shaped projections 14 which protrude into the interior at a height of only a few millimeters. With a clear distance between the outer edge of the wing 10 on the one hand and the inner wall 11 of the evaporator body 1 on the other hand of, for example, 6 mm, the height of the projections can be, for example, 3 mm. The projections arranged at a distance of, for example, 100 mm from one another are now like the sectional illustration in FIG. 2 reveals, based on the direction of rotation of the rotor
9 (Pfeil 15) in dem in der Aufwärtsbewegung von den Flü¬ geln überstrichenen Wandungsbereich angeordnet. Hierdurch wird gewährleistet, daß die auf der jeweils obenliegenden Flügelfläche liegenden Klumpen sich jeweils an den entspre¬ chenden Kanten der stegförmigen Vorsprünge 14 anlegen und hierbei auf der Innenwandung festgehalten und somit von den Kanten der Flügel 10 aufgebrochen werden können.9 (arrow 15) in the wall area covered by the wings in the upward movement. This ensures that the clumps lying on the wing surface lying above each abut against the corresponding edges of the web-shaped projections 14 and are thereby held on the inner wall and can thus be broken open by the edges of the wings 10.
Anstelle von stegförmig nach innenragenden Vorsprüngen, wie dargestellt, können die Schneidzonen auch durch ent¬ sprechende nach außen weisende, vorzugsweise rinnenförmi¬ ge Vertiefungen in der Innenwandung 11 gebildet werden. Auch durch derartige Vertiefungen in der Wandung werden auf den Flügeln befindliche größere Klumpen, die im Durch¬ messer größer sind als der normale Spalt zwischen Flügel¬ kante und Innenwandung, von der Kante der rinnenför igen Vertiefung f stgehalten, so daß hier wiederum die Flügel¬ kante die Klumpen aufbrechen kann.Instead of web-like projections projecting inwards, as shown, the cutting zones can also be formed by corresponding outward-pointing, preferably channel-shaped depressions in the inner wall 11. Such lumps in the wall also hold larger clumps on the wings, which are larger in diameter than the normal gap between the wing edge and the inner wall, from the edge of the channel-shaped depression f, so that here again the wings edge can break up the lump.
Je nach Art des Produkte kann es genügen, wenn nur eine rinnenförmige Vertiefung bzw. ein stegförmiger Vorsprung als Schneidzone an der Innenwand angeordnet ist. Die Schneidzonen können hierbei, wie dargestellt, achsparallel ausgerichtet sein oder aber unter einem geringen Winkel, gemessen zur Längsachse, schraubenlinienförmig ausgerichtet sein. Weder bei einer rinnenförmigen Ausführung noch bei einer stegförmigen Ausführung ist es erforderlich, daß die Schneidzonen über die volle Länge durchgehen, sondern sie können hierbei in linienförmiger Anordnung, durch punktförmige Vertiefungen oder punktförmige oder stegför ige Vorsprünge kurzer Länge gebildet sein. In der Ausführungsform als Vorspränge können diese beispiels¬ weise durch Nocken, Kämme, Stifte oder auch durch Schweiß- raupen im Wege der Auftragschweißung aufgebracht werden. Hierbei ist es auch möglich, bei der Anordnung mehrerer paralleler Schneidzonen jeweils, in Umfangsrichtung gesehen, eine als Vertiefung ausgebildete und eine als stegförmigen Vorsprung ausgebildete Schneidzone aufeinanderfolgen zu lassen. Depending on the type of product, it may be sufficient if only a trough-shaped depression or a web-shaped projection is arranged as a cutting zone on the inner wall. The cutting zones can, as shown, be aligned axially parallel or, at a small angle, measured in relation to the longitudinal axis, can be aligned in a helical line. Neither in a trough-shaped version nor in a web-shaped version, it is necessary that the cutting zones run over the full length, but they can be formed in a linear arrangement, by punctiform depressions or punctiform or stegför-shaped projections of short length. In the embodiment as projections, these can be applied, for example, by cams, combs, pins or also by welding beads by means of build-up welding. Here, it is also possible, in the arrangement of a plurality of parallel cutting zones, in each case viewed in the circumferential direction, one designed as a depression and one as a web-shaped one Let the projection formed cutting zone follow one another.

Claims

Ansprüche : Expectations :
1. Verdampfereinrichtung zur Wärmebehandlung, insbesondere zur Trocknung von Schlämmen, mit einem beheizbaren hohl- zylindrischen in etwa horizontal ausgerichteten Verdampfer¬ körper, der an einem Ende einen Produkteinlaß und am anderen Ende einen Produktauslaß aufweist und in dessen vom Produkt beaufschlagten Innenraum ein mit im wesentli¬ chen radial ausgerichteten Flügeln versehener, von außen antreibbarer Rotor angeordnet ist, dadurch gekennzeichnet, daß die Wandung (11) des Innenraumes zumindest im Bereich vor dem Produktauslaß (12) mit wenigstens einer sich im wesentlichen in Innenraumlangsrichtung erstreckenden, die Kreiskontur des Innenraumquerschnitts unterbrechenden Schneidzone (13) versehen ist.1. Evaporator device for heat treatment, in particular for drying sludge, with a heatable hollow-cylindrical approximately horizontally oriented evaporator body, which has a product inlet at one end and a product outlet at the other end, and in the interior of which the product acts, an essentially ¬ Chen radially oriented vanes provided, externally drivable rotor is arranged, characterized in that the wall (11) of the interior at least in the area in front of the product outlet (12) with at least one cutting zone extending essentially in the longitudinal direction of the interior and interrupting the circular contour of the interior cross section (13) is provided.
2. Verdampfereinrichtung nach Anspruch 1, dadurch gekenn¬ zeichnet, daß die Schneidzone (13) durch wenigstens eine Vertiefung, insbesondere rinnenförmige Vertiefung der Innenwandung (11) gebildet ist.2. Evaporator device according to claim 1, characterized gekenn¬ characterized in that the cutting zone (13) is formed by at least one recess, in particular channel-shaped recess of the inner wall (11).
3. Verdampfereinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Schneidzone (13) durch wenigstens einen Vorsprung, insbesondere einen stegförmigen Vorsprung (14) der Innenwandung (11) gebildet ist.3. Evaporator device according to claim 1 or 2, characterized in that the cutting zone (13) by at least one projection, in particular a web-shaped projection (14) of the inner wall (11) is formed.
4. Verdampfereinrichtung nach einem der Ansprüche 1 bis4. Evaporator device according to one of claims 1 to
3, dadurch gekennzeichnet, daß mehrere mit Abstand in etwa parallel zueinander verlaufende linienförmige Schneid- zonen (13) vorgesehen sind.3, characterized in that a plurality of linear cutting zones (13) running approximately parallel to one another are provided.
5. Verdampfereinrichtung nach einem der Ansprüche 1 bis5. Evaporator device according to one of claims 1 to
4, dadurch gekennzeichnet, daß die Schneidzone (13) , bezogen auf die Drehrichtung (15) des Rotors (9) , zumindest in dem von den aufwärtsdrehenden Flügeln (10) überstri- chenen Wandungsbereich angeordnet ist. 4, characterized in that the cutting zone (13), based on the direction of rotation (15) of the rotor (9), is arranged at least in the wall area covered by the upwardly rotating blades (10).
6. Verdampfereinrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Höhe der Schneidzonen (13) nur wenige Millimeter beträgt. 6. Evaporator device according to one of claims 1 to 5, characterized in that the height of the cutting zones (13) is only a few millimeters.
EP92918423A 1991-12-02 1992-08-25 Evaporating plant for processing sludges Expired - Lifetime EP0569558B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9114967U DE9114967U1 (en) 1991-12-02 1991-12-02
DE9114967U 1991-12-02
PCT/EP1992/001947 WO1993011396A1 (en) 1991-12-02 1992-08-25 Evaporating plant for processing sludges

Publications (2)

Publication Number Publication Date
EP0569558A1 true EP0569558A1 (en) 1993-11-18
EP0569558B1 EP0569558B1 (en) 1996-01-31

Family

ID=6873836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92918423A Expired - Lifetime EP0569558B1 (en) 1991-12-02 1992-08-25 Evaporating plant for processing sludges

Country Status (7)

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US (1) US5375343A (en)
EP (1) EP0569558B1 (en)
JP (1) JPH06505433A (en)
AT (1) ATE133780T1 (en)
DE (2) DE9114967U1 (en)
ES (1) ES2085643T3 (en)
WO (1) WO1993011396A1 (en)

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Publication number Priority date Publication date Assignee Title
NO176006C (en) * 1992-11-17 1995-01-18 Thermtech As Process of drying materials
AU682860B2 (en) * 1994-01-07 1997-10-23 Thermtech A/S A process and a device in drying of organic and/or unorganic materials
ES2080017B1 (en) * 1994-05-10 1996-07-16 Olmedilla Blas Bedmar JOINT, CONTINUOUS AND AUTOMATIC INSTALLATION FOR THE DRYING AND TRANSFORMING OF VEGETABLE AND ANIMAL MATERIALS.
DE19542301B4 (en) * 1995-11-14 2014-05-28 Pondus Verfahrenstechnik Gmbh Method and device for drying sludge-like dry material, in particular sewage sludge
DE102007042006A1 (en) * 2007-09-04 2009-03-05 Reiflock Verwaltungs Gmbh Drying device for sewage sludge
DE202015105780U1 (en) * 2015-10-30 2015-11-11 Josef Fliegl jun. drying device
CA2960052C (en) * 2016-03-07 2020-08-25 Electric Horsepower Inc. Induction heater for drilling cuttings and other materials and method
FI20195926A1 (en) 2019-06-12 2020-12-13 Aurotec Gmbh Thin-film treatment apparatus
WO2021116207A1 (en) 2019-12-09 2021-06-17 Hellenes Holding As Apparatus for continuous thermal separation of a multi-component substance
AU2020402128A1 (en) 2019-12-09 2022-06-30 Grant Prideco, Inc. Method for continuous thermal separation of a multi-component substance

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DE102230C (en) * 1898-05-04 1899-05-02
GB662303A (en) * 1949-07-13 1951-12-05 Charles Goodall Improvements relating to apparatus for the treatment of grass or other vegetable matter
FR1271497A (en) * 1960-03-24 1961-09-15 Improved device for drying powdery materials
US3292870A (en) * 1964-12-15 1966-12-20 Raymond M Lang Vegetation processing machine
US3313034A (en) * 1965-08-02 1967-04-11 Leo J Meyer Nut meat de-watering machine
GB1158191A (en) * 1966-07-20 1969-07-16 Henry Balfour And Company Ltd Improvements relating to Heat Exchangers.
DE2306856A1 (en) * 1973-02-12 1974-08-15 Wieneke Franz METHODS FOR DRYING VEGETABLE PRODUCTS, SUCH AS GRAIN OR PULP

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See references of WO9311396A1 *

Also Published As

Publication number Publication date
WO1993011396A1 (en) 1993-06-10
EP0569558B1 (en) 1996-01-31
DE59205253D1 (en) 1996-03-14
US5375343A (en) 1994-12-27
DE9114967U1 (en) 1993-04-01
ATE133780T1 (en) 1996-02-15
ES2085643T3 (en) 1996-06-01
JPH06505433A (en) 1994-06-23

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