EP3218315A1 - Device for granulating sludge and method for operating said device - Google Patents

Device for granulating sludge and method for operating said device

Info

Publication number
EP3218315A1
EP3218315A1 EP14835654.6A EP14835654A EP3218315A1 EP 3218315 A1 EP3218315 A1 EP 3218315A1 EP 14835654 A EP14835654 A EP 14835654A EP 3218315 A1 EP3218315 A1 EP 3218315A1
Authority
EP
European Patent Office
Prior art keywords
hollow cylindrical
sludge
cylindrical die
granulating
knife
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Withdrawn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
EP14835654.6A
Other languages
German (de)
French (fr)
Inventor
Thomas Christian LAXHUBER
Tobias Latein
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.)
Stela Laxhuber GmbH
Original Assignee
Stela Laxhuber GmbH
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 Stela Laxhuber GmbH filed Critical Stela Laxhuber GmbH
Publication of EP3218315A1 publication Critical patent/EP3218315A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
    • B02C18/0092—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage for waste water or for garbage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/062—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives with rotor elements extending axially in close radial proximity of a concentrically arranged slotted or perforated ring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/36—Adding fluid, other than for crushing or disintegrating by fluid energy the crushing or disintegrating zone being submerged in liquid
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles

Definitions

  • the invention relates to a device for granulating sludge with a hollow cylindrical die, is to be pressed into the sludge to be granulated and in which a scraper with at least one knife is arranged to rotate.
  • the invention further relates to a method for operating a device for granulating sludge, in which sludge to be granulated in a hollow cylindrical die is pressed and in the die a scraper is rotated.
  • the at least one knife can also be referred to as a scraper or scraper disk, which is driven or pushed on the inside by the scraper over the hollow cylindrical die and, in conjunction with the applied pressure, passes through the sludge to be granulated from the inside to the outside Passages penetrate, which are formed in the die.
  • a device and a method of the generic type are known from the applicant's DE 202 02 626 111. With the device described there, mechanically pre-dewatered sludge is optionally processed into a free-flowing granulate in order to be able to subsequently dry this granulate in a rapid, energy-efficient and cost-effective manner.
  • Granulation of the sludge before drying causes an increase in efficiency during the subsequent drying, because the granules have a comparatively large surface area. Volume ratio has. Thus, evaporation of water from the granules is simplified and the residence time in the subsequent drying is significantly reduced. In addition, dried granules are easier to handle, especially in packaging and / or dosing as fuel.
  • the invention has for its object to provide an apparatus and a method for granulating sludge, which are even more efficient and efficient compared to conventional apparatus and methods. It is particularly relevant that the sludge to be granulated can have very different compositions and consistencies as well as foreign substances such as hair. Inventive solution
  • a device for granulating sludge with a hollow cylindrical die is to be pressed into the sludge to be granulated and in which a scraper with at least one blade is arranged to rotate.
  • the at least one blade is supported on the rotating scraper by means of a knife holder substantially radially movable.
  • the knife held or held radially movably in the scraper in accordance with the invention can, on sweeping over the die and its outlet openings, escape the sludge material which, as investigations in accordance with the invention have shown, can accumulate at the outlet openings.
  • the knife according to the invention exceeds or covers this jammed sludge material, it does not lock the rotation of the associated scraper and thus ensures its permanent operation.
  • the knife according to the invention is preferably arranged substantially radially directed, which means that its pawl or disk plane extends substantially radially.
  • the knife according to the invention mounted in an evasive manner in its vertical position is moved particularly advantageously within the die in alternating circumferential direction, ie the associated wiper rotates alternately once to the right and once to the left.
  • the said outlet openings in the matrix are once crossed over from the left and then from the right. It is thereby achieved that of the scraper according to the invention with the
  • Knives residues or accumulated sludge material which has collected on one side of the respective outlet opening, to the other side towards the center of the outlet opening and then moved out through the outlet opening from the die.
  • the at least one knife which is held essentially radially movable, can be freely displaced against its own weight on the knife holder in an advantageous manner.
  • Such a design is particularly simple and therefore cost-effective and reliable, because then no additional equipment is required for the pushing of the knife according to the invention to the inside of the die.
  • the knife according to the invention can also be urged against the inside of the hollow cylindrical die by means of an elastic element, for example a helical spring or a leaf spring.
  • the freely displaceable knife is preferably held on the knife holder in the circumferential direction of the hollow cylindrical die with a clearance of between 1% to 4% of the inside diameter of the hollow cylindrical die, preferably between 2% and 3% of the inside diameter of the hollow cylindrical die.
  • a clearance or clearance between the knife holder and the knife allows a sufficiently precise guidance of the knife and other on the other hand for this one such large movement space that jamming or clogging during operation of the device according to the invention is reliably avoided.
  • a plurality of individual knives are preferably arranged successively on the knife holder in the axial direction of the hollow cylindrical die. The several individual knives allow a punctual dodging or yielding at individual sections of the axial extent of the hollow cylindrical die. At other areas, however, the knives there remain attached to the mattress, so that they work there without residue.
  • the plurality of individual knives are particularly preferably arranged offset in the circumferential direction of the hollow cylindrical die. With the offset of the axially successively arranged blades in the circumferential direction, the stability or rigidity of the associated wiper can be increased.
  • the individual knives do not all stroke at the same time via associated passage openings, if they are advantageously arranged in an axial row, in particular on the downwardly facing region of the hollow cylindrical die.
  • the at least one inventively held substantially radially movable knife preferably has a blade height which is between 95% to 98% of the inner diameter of the hollow cylindrical die, preferably between 96% and 97% of the inner diameter of the hollow cylindrical die. With the design of this kind, the knives according to the invention can yield, but at the same time largely circulate the entire sludge material in the hollow cylindrical die during rotation of the associated scraper.
  • the knife holder according to the invention is further preferably formed by means of a tube extending axially in the hollow cylindrical die.
  • the pipe of this type is inexpensive to produce and can at the same time provide a high degree of torsional mo- ment, which then makes it possible to drive the rotating scraper according to the invention at only one of its axial ends.
  • the tube is preferably provided with at least one passage opening extending transversely to the orientation of the at least one substantially radially movably supported knife.
  • the at least one passage opening is thus located on the tube in a section which is relatively far away from the holder of the knife. This is advantageous both with regard to a low-resistance flow through the pipe and with regard to a high rigidity of the pipe.
  • the at least one inventively substantially radially movably held knife is also preferably supported by the knife holder at its two opposite end portions.
  • the knife is thus held with respect to the hollow cylindrical die so at diametrically opposite end portions or driven in terms of its orbital motion. With this support, a high torque can be transmitted to the knife without the risk of jamming or even deformation of the knife.
  • the at least one substantially radially movable held knife is also advantageously designed at least one end facing the die in cross-section V-shaped. Due to the V-shape, the knife advantageously slides over the die and also over material jammed therein. At the same time, the V-shape forms a kind of cutting edge, by means of which accumulated material can be pushed particularly strongly away.
  • the invention is further directed to a method of operating a device for granulating sludge, in particular of the above-mentioned type according to the invention, in which granules to be granulated in a hollow cylindrical die Pressed mud, in the die a scraper is rotated, and the scraper is rotated in rotation with respect to its rotation direction.
  • the die is once passed over from the left and then passed over from the right. It is thereby achieved that residues or accumulated sludge material in both circumferential directions can be pushed away from the stripping according to the invention. An accumulation of material on only one side of the associated outlet openings of the die is reliably avoided.
  • FIG. 1 shows a perspective view of an embodiment of a device according to the invention for granulating sludge
  • FIG. 2 shows the section II - II according to FIG. 1.
  • an apparatus 10 for granulating a slurry 12 is illustrated, in which the slurry 12 is distributed by means of a main supply line 14 through a plurality of valves 16 connected thereto into respectively associated individual supply lines 18.
  • the individual supply lines 18 each lead to a location of the longitudinal extension of a support tube 20, to which they are coupled there in a fluid-conducting manner by means of a respective line connection 24.
  • the support tube 20 is mounted by means of a pipe holder 22 stationary. In the pipe holder 22, among other viewing window 26 are recessed, by means of which an operator of the device 10 can be granted a view under the support tube 20.
  • In the support tube 20 is a hollow cylindrical die 28, whose outer diameter is only slightly smaller than the inner diameter of the support tube 20.
  • the hollow cylindrical die 28 extends substantially over the entire length of the support tube 20 and has in their reference to FIG Upper portion each inlet openings 30, can then be introduced through the granulate to be granulated sludge 12 from the individual supply lines 18 and the associated line terminals 24 in the interior of the hollow cylindrical die 28. Furthermore, a row of outlet openings 32 is located on the lower section of the female mold 28 with reference to FIG. 2 in its longitudinal direction. The sludge 12 can then be carried out again from the female mold 28 through these outlet openings 32, wherein congruent openings are also formed in the support tube 20 are located, which are present but not shown.
  • a scraper 34 which rotates in the die 28 and thus sweeps over the outlet openings 32, that of the these outlets 32 pushed out sludge 12 is portioned or granulated.
  • the scraper 34 is provided with a plurality of plate-shaped scrapers or knives 36, which are mounted so as to be movable in the longitudinal direction or axial direction of the scraper 34 and displaceable circumferentially relative to one another on a knife holder 38, essentially in the radial direction.
  • the knife holder 38 is designed by means of a tube 40 which also extends coaxially to the hollow cylindrical die 28 and thereby has an outer diameter of about 1/2 to 2/3 of the inner diameter 44 of the die 28.
  • Tube 40 are each formed diametrically opposite longitudinal slots 42, in each of which one of the blades 36 is supported with a clearance 46 in the circumferential direction of about 1/2 of the blade thickness or of presently between 2% and 3% of the inner diameter of the hollow cylindrical die 28 ,
  • the respective knife 36 is otherwise freely movable in the two associated longitudinal slots 42 of its knife holder 38 and is thus moved during the rotation of the cutter.
  • the stripper 34 is pushed downwards towards its outlet openings 32 with respect to its own weight and with reference to FIG.
  • the blades 36 urge radially when passing over the associated outlet openings 32, that is, due to their own weight.
  • the knives 36 either lie directly against the inside of the hollow-cylindrical die 28 at the lower region thereof or strike over sludge material which has possibly accumulated at the edges of the outlet openings 32.
  • the individual knives 36 each have a knife height 48 which is smaller than the inner diameter 44 of the hollow cylindrical die 28, namely presently between 96% and 97% of the inner diameter 44 of the hollow cylindrical die 28.
  • the knives 36 thus have the inner diameter 44 the hollow cylindrical die 28 within this also some play or freedom of movement to be able to exceed to a certain extent dammed up mud material and not to block the rotational movement of the scraper 34.
  • a drive 50 is provided at one end of the support tube 20, by means of which the scraper 34 can be rotated alternately with respect to its direction of rotation.
  • the wiper 34 can thus be rotated both clockwise and anti-clockwise. With this alternating rotation, it is possible to change the stripping direction of the blades 36 across the exhaust ports 32.
  • the outlet openings 32 are thus covered with respect to the sectional view of FIG. 2 once from the left and once from the right. In this way it is possible that
  • Sludge residues that have accumulated on one side of one of the outlet openings 32 are removed when repainting the associated blade 36.
  • the tube 40 and the blades 36 are each formed with passage openings 52 and 54, respectively.
  • the passage opening 52 penetrate th the wall of the tube 40 in the middle transversely to the orientation of the respective adjacent through the knife 36.
  • the through holes 54 also pass through the respective knife 36 centrally transversely to its disc plane 56th

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Food Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Glanulating (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention relates to a device for granulating sludge, comprising a hollow-cylindrical die into which sludge to be granulated is injected and in which a scraper with at least one knife is rotatingly arranged. According to the invention, the at least one knife is held on the rotating scraper in a radially movable manner by means of a knife holder.

Description

Beschreibung  description
VORRICHTUNG ZUM GRANULIEREN VON SCHLAMM UND VERFAHREN ZUM BETREIBEN DIESER VORRICHTUNG DEVICE FOR GRANULATING SLUDGE AND METHOD FOR OPERATING THIS DEVICE
Hintergrund der Erfindung Background of the invention
Die Erfindung betrifft eine Vorrichtung zum Granulieren von Schlamm mit einer hohlzylindrischen Matrize, in die zu granulierender Schlamm einzupressen ist und in der ein Abstreifer mit mindestens einem Messer rotierend angeordnet ist. Die Erfindung betrifft ferner ein Verfahren zum Betreiben einer Vorrichtung zum Granulieren von Schlamm, bei dem in eine hohlzylindrische Matrize zu granulierender Schlamm eingepresst und in der Matrize ein Abstreifer rotiert wird. The invention relates to a device for granulating sludge with a hollow cylindrical die, is to be pressed into the sludge to be granulated and in which a scraper with at least one knife is arranged to rotate. The invention further relates to a method for operating a device for granulating sludge, in which sludge to be granulated in a hollow cylindrical die is pressed and in the die a scraper is rotated.
Das mindestens eine Messer kann auch als Schaber oder Abstreifscheibe be- zeichnet werden, der bzw. die, vom Abstreifer angetrieben, innenseitig über die hohlzylindrische Matrize bewegt bzw. geschoben wird und dadurch in Verbindung mit anstehendem Druck den zu granulierenden Schlamm von innen nach außen durch Durchtrittsöffnungen drängt, die in der Matrize ausgebildet sind. Eine Vorrichtung und ein Verfahren der gattungsgemäßen Art sind aus der vom Anmelder stammenden DE 202 02 626 111 bekannt. Mit der dort beschriebenen Vorrichtung wird gegebenenfalls mechanisch vorentwässerter Schlamm zu einem rieselfähigen Granulat verarbeitet, um dieses Granulat nachfolgend auf schnelle sowie energie- und kostengünstige Weise trocknen zu können. Eine Granulierung des Schlamms vor der Trocknung bewirkt eine Effizienzsteigerung bei der nachfolgenden Trocknung, weil das Granulat ein vergleichsweise großes Oberflächen- Volumen-Verhältnis aufweist. Damit wird eine Verdampfung von Wasser aus dem Granulat vereinfacht und die Verweilzeit in der nachfolgenden Trocknung wird erheblich reduziert. Außerdem ist ein getrocknetes Granulat einfacher zu handhaben, insbesondere bei der Verpackung und/oder der Dosierung als Brennstoff. The at least one knife can also be referred to as a scraper or scraper disk, which is driven or pushed on the inside by the scraper over the hollow cylindrical die and, in conjunction with the applied pressure, passes through the sludge to be granulated from the inside to the outside Passages penetrate, which are formed in the die. A device and a method of the generic type are known from the applicant's DE 202 02 626 111. With the device described there, mechanically pre-dewatered sludge is optionally processed into a free-flowing granulate in order to be able to subsequently dry this granulate in a rapid, energy-efficient and cost-effective manner. Granulation of the sludge before drying causes an increase in efficiency during the subsequent drying, because the granules have a comparatively large surface area. Volume ratio has. Thus, evaporation of water from the granules is simplified and the residence time in the subsequent drying is significantly reduced. In addition, dried granules are easier to handle, especially in packaging and / or dosing as fuel.
Zugrundeliegende Aufgabe Underlying task
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung und ein Verfahren zum Granulieren von Schlamm zu schaffen, welche im Vergleich zu herkömmlichen Vorrichtungen und Verfahren noch effizienter und leistungsfähiger sind. Dabei ist insbesondere relevant, dass der zu granulierende Schlamm stark unterschiedliche Zusammensetzungen und Konsistenzen sowie auch Fremdstoffe, wie etwa Haare, aufweisen kann. Erfindungsgemäße Lösung The invention has for its object to provide an apparatus and a method for granulating sludge, which are even more efficient and efficient compared to conventional apparatus and methods. It is particularly relevant that the sludge to be granulated can have very different compositions and consistencies as well as foreign substances such as hair. Inventive solution
Diese Aufgabe ist erfindungsgemäß mit einer Vorrichtung zum Granulieren von Schlamm mit einer hohlzylindrischen Matrize gelöst, in die zu granulierender Schlamm einzupressen ist und in der ein Abstreifer mit mindestens einem Messer rotierend angeordnet ist. Gemäß der Erfindung ist das mindestens eine Messer am rotierenden Abstreifer mittels einer Messerhalterung im Wesentlichen radial bewegbar gehaltert. Das erfindungsgemäß im Abstreifer radial bewegbar gehalterte bzw. gehaltene Messer kann beim Überstreichen der Matrize und deren Auslassöffnungen jenem Schlammmaterial ausweichen, welches sich, wie erfindungs- gemäße Untersuchungen gezeigt haben, an den Auslassöffnungen anhäufen kann. Indem das erfindungsgemäße Messer dieses gestaute Schlammmaterial übersteigt bzw. überstreicht, sperrt es nicht die Rotation des zugehörigen Abstreifers und stellt somit dessen dauerhaften Betrieb sicher. Das erfindungsgemäße Messer ist dabei vorzugsweise im Wesentlichen radial gerichtet angeordnet, das bedeutet, dass sich seine Klinken- bzw. Scheibenebene im Wesentlichen radial erstreckt. Das derart in seiner Höhenlage ausweichend gelagerte, erfindungsgemäße Messer wird besonders vorteilhaft innerhalb der Matrize in wechselnder Umfangsrich- tung bewegt, der zugehörige Abstreifer rotiert also alternierend einmal rechtsherum und einmal linksherum. Damit werden die genannten Auslassöffnungen in der Matrize einmal von links her überstrichen und dann nachfolgend von rechts her. Dadurch wird erreicht, dass von dem erfindungsgemäßen Abstreifer mit dessenThis object is achieved according to the invention with a device for granulating sludge with a hollow cylindrical die, is to be pressed into the sludge to be granulated and in which a scraper with at least one blade is arranged to rotate. According to the invention, the at least one blade is supported on the rotating scraper by means of a knife holder substantially radially movable. The knife held or held radially movably in the scraper in accordance with the invention can, on sweeping over the die and its outlet openings, escape the sludge material which, as investigations in accordance with the invention have shown, can accumulate at the outlet openings. By the knife according to the invention exceeds or covers this jammed sludge material, it does not lock the rotation of the associated scraper and thus ensures its permanent operation. The knife according to the invention is preferably arranged substantially radially directed, which means that its pawl or disk plane extends substantially radially. The knife according to the invention mounted in an evasive manner in its vertical position is moved particularly advantageously within the die in alternating circumferential direction, ie the associated wiper rotates alternately once to the right and once to the left. Thus, the said outlet openings in the matrix are once crossed over from the left and then from the right. It is thereby achieved that of the scraper according to the invention with the
Messern Rückstände bzw. gestautes Schlammmaterial, welches sich an einer Seite der jeweiligen Auslassöffnung gesammelt hat, zur anderen Seite hin ins Zentrum der Auslassöffnung und dann durch die Auslassöffnung hindurch aus der Matrize herausbewegt wird. Knives residues or accumulated sludge material, which has collected on one side of the respective outlet opening, to the other side towards the center of the outlet opening and then moved out through the outlet opening from the die.
Bei der erfindungsgemäßen Vorrichtung zum Granulieren von Schlamm ist in vorteilhafter Weise an der Messerhalterung das mindestens eine im Wesentlichen radial bewegbar gehalterte Messer seinem Eigengewicht unterliegend frei verschiebbar. Die derartige Gestaltung ist besonders einfach und damit kostengünstig sowie betriebssicher, denn für das Herandrängen des erfindungsgemäßen Messers an die Innenseite der Matrize wird dann keinerlei zusätzliche Apparatur benötigt. Alternativ kann das erfindungsgemäße Messer auch mittels eines elastischen Elements, etwa einer Schraubenfeder oder einer Blattfeder, gegen die Innenseite der hohlzylindrischen Matrize gedrängt sein. In the apparatus according to the invention for granulating sludge, the at least one knife, which is held essentially radially movable, can be freely displaced against its own weight on the knife holder in an advantageous manner. Such a design is particularly simple and therefore cost-effective and reliable, because then no additional equipment is required for the pushing of the knife according to the invention to the inside of the die. Alternatively, the knife according to the invention can also be urged against the inside of the hollow cylindrical die by means of an elastic element, for example a helical spring or a leaf spring.
Das frei verschiebbare Messer ist bevorzugt an der Messerhalterung in Umfangs- richtung der hohlzylindrischen Matrize mit einem Spielmaß von zwischen 1 % bis 4 % des Innendurchmessers der hohlzylindrischen Matrize, bevorzugt zwischen 2 % und 3 % des Innendurchmessers der hohlzylindrischen Matrize, gehaltert. Das derartige Spiel bzw. der derartige Freiraum zwischen Messerhalterung und Messer erlaubt einerseits eine ausreichend genaue Führung des Messers und ande- rerseits für dieses einen derart großen Bewegungsraum, dass ein Verklemmen oder Verstopfen während des Betriebs der erfindungsgemäßen Vorrichtung sicher vermieden ist. Ferner sind an der Messerhalterung vorzugsweise mehrere einzelne Messer in axialer Richtung der hohlzylindrischen Matrize aufeinander folgend angeordnet. Die mehreren einzelnen Messer erlauben ein punktuelles Ausweichen bzw. Nachgeben an einzelnen Abschnitten der axialen Erstreckung der hohlzylindrischen Matrize. An anderen Bereichen bleiben die dortigen Messer hingegen an der Mat- rize angelegt, so dass sie dort entsprechend rückstandslos arbeiten. The freely displaceable knife is preferably held on the knife holder in the circumferential direction of the hollow cylindrical die with a clearance of between 1% to 4% of the inside diameter of the hollow cylindrical die, preferably between 2% and 3% of the inside diameter of the hollow cylindrical die. On the one hand, such clearance or clearance between the knife holder and the knife allows a sufficiently precise guidance of the knife and other on the other hand for this one such large movement space that jamming or clogging during operation of the device according to the invention is reliably avoided. Furthermore, a plurality of individual knives are preferably arranged successively on the knife holder in the axial direction of the hollow cylindrical die. The several individual knives allow a punctual dodging or yielding at individual sections of the axial extent of the hollow cylindrical die. At other areas, however, the knives there remain attached to the mattress, so that they work there without residue.
Die mehreren einzelnen Messer sind besonders bevorzugt in Umfangsrichtung der hohlzylindrischen Matrize versetzt angeordnet. Mit dem Versatz der axial hintereinander angeordneten Messer in Umfangsrichtung kann die Stabilität bzw. Stei- figkeit des zugehörigen Abstreifers erhöht werden. Dabei streichen die einzelnen Messer nicht alle gleichzeitig über zugehörige Durchlassöffnungen, wenn diese vorteilhaft in einer axialen Reihe, insbesondere am nach unten gewandten Bereich der hohlzylindrischen Matrize, angeordnet sind. Das mindestens eine erfindungsgemäß im Wesentlichen radial bewegbar gehalterte Messer weist vorzugsweise eine Messerhöhe auf, die zwischen 95 % bis 98 % des Innendurchmessers der hohlzylindrischen Matrize, bevorzugt zwischen 96 % und 97 % des Innendurchmessers der hohlzylindrischen Matrize, beträgt. Mit der derartigen Gestaltung können die erfindungsgemäßen Messer ausweichen, wäl- zen aber zugleich weitgehend das gesamte Schlammmaterial in der hohlzylindrischen Matrize beim Rotieren des zugehörigen Abstreifers um. The plurality of individual knives are particularly preferably arranged offset in the circumferential direction of the hollow cylindrical die. With the offset of the axially successively arranged blades in the circumferential direction, the stability or rigidity of the associated wiper can be increased. The individual knives do not all stroke at the same time via associated passage openings, if they are advantageously arranged in an axial row, in particular on the downwardly facing region of the hollow cylindrical die. The at least one inventively held substantially radially movable knife preferably has a blade height which is between 95% to 98% of the inner diameter of the hollow cylindrical die, preferably between 96% and 97% of the inner diameter of the hollow cylindrical die. With the design of this kind, the knives according to the invention can yield, but at the same time largely circulate the entire sludge material in the hollow cylindrical die during rotation of the associated scraper.
Die erfindungsgemäße Messerhalterung ist ferner vorzugsweise mittels eines sich axial in der hohlzylindrischen Matrize erstreckenden Rohres gebildet. Das derarti- ge Rohr ist kostengünstig herzustellen und kann zugleich ein hohes Torsionsmo- ment übertragen, wodurch dann die Möglichkeit besteht, den erfindungsgemäß rotierenden Abstreifer an nur einem seiner axialen Enden anzutreiben. The knife holder according to the invention is further preferably formed by means of a tube extending axially in the hollow cylindrical die. The pipe of this type is inexpensive to produce and can at the same time provide a high degree of torsional mo- ment, which then makes it possible to drive the rotating scraper according to the invention at only one of its axial ends.
Das Rohr ist bevorzugt mit mindestens einer Durchgangsöffnung versehen, die sich quer zur Ausrichtung des mindestens einen im Wesentlichen radial bewegbar gehalterten Messers erstreckt. Die mindestens eine Durchgangsöffnung befindet sich damit am Rohr in einem Abschnitt, der vergleichsweise weit von der Halterung der Messer entfernt ist. Dies ist sowohl im Hinblick auf ein widerstandsarmes Durchströmen des Rohres als auch im Hinblick auf eine hohe Steifigkeit des Roh- res von Vorteil. Um die Durchströmung des erfindungsgemäßen Abstreifers weiter zu verbessern ist es ferner vorteilhaft, auch das mindestens eine Messer innerhalb seiner Scheibenebene mit Durchgangsöffnungen zu gestalten. The tube is preferably provided with at least one passage opening extending transversely to the orientation of the at least one substantially radially movably supported knife. The at least one passage opening is thus located on the tube in a section which is relatively far away from the holder of the knife. This is advantageous both with regard to a low-resistance flow through the pipe and with regard to a high rigidity of the pipe. In order to improve the flow through the scraper according to the invention further, it is also advantageous to make the at least one knife within its disc plane with through holes.
Das mindestens eine erfindungsgemäß im Wesentlichen radial bewegbar gehalter- te Messer ist ferner vorzugsweise von der Messerhalterung an seinen zwei gegenüberliegenden Endbereichen gehaltert. Das Messer wird damit bezogen auf die hohlzylindrische Matrize also an diametral gegenüberliegenden Endbereichen gehalten bzw. hinsichtlich seiner Umlaufbewegung angetrieben. Mit dieser AbStützung kann auf das Messer ein hohes Drehmoment übertragen werden, ohne dass die Gefahr eines Verkantens oder gar eines Verformens des Messers besteht. The at least one inventively substantially radially movably held knife is also preferably supported by the knife holder at its two opposite end portions. The knife is thus held with respect to the hollow cylindrical die so at diametrically opposite end portions or driven in terms of its orbital motion. With this support, a high torque can be transmitted to the knife without the risk of jamming or even deformation of the knife.
Das mindestens eine im Wesentlichen radial bewegbar gehalterte Messer ist ferner vorteilhaft an mindestens einem zur Matrize gewandten Ende im Querschnitt V-förmig gestaltet. Aufgrund der V-Form gleitet das Messer vorteilhaft über die Matrize und auch über darin angestautes Material. Zugleich bildet die V-Form eine Art Schneide, mittels der angestautes Material besonders stark hinfort geschoben werden kann. The at least one substantially radially movable held knife is also advantageously designed at least one end facing the die in cross-section V-shaped. Due to the V-shape, the knife advantageously slides over the die and also over material jammed therein. At the same time, the V-shape forms a kind of cutting edge, by means of which accumulated material can be pushed particularly strongly away.
Die Erfindung ist ferner auf ein Verfahren zum Betreiben einer Vorrichtung zum Granulieren von Schlamm, insbesondere der oben genannten, erfindungsgemäßen Art, gerichtet, bei dem in eine hohlzylindrische Matrize zu granulierender Schlamm eingepresst, in der Matrize ein Abstreifer rotiert wird , und der Abstreifer hinsichtlich seiner Rotationsrichtung alternierend rotiert wird. Damit wird, wie oben bereits erläutert, die Matrize einmal von links her überstrichen und dann nachfolgend von rechts her überstrichen. Dadurch wird erreicht, dass von dem erfin- dungsgemäßen Abstreifen Rückstände bzw. gestautes Schlammmaterial in beide Umfangsrichtungen weg geschoben werden kann. Ein Ansammeln von Material an nur einer Seite von zugehörigen Auslassöffnungen der Matrize wird sicher vermieden. Kurzbeschreibung der Zeichnungen The invention is further directed to a method of operating a device for granulating sludge, in particular of the above-mentioned type according to the invention, in which granules to be granulated in a hollow cylindrical die Pressed mud, in the die a scraper is rotated, and the scraper is rotated in rotation with respect to its rotation direction. Thus, as already explained above, the die is once passed over from the left and then passed over from the right. It is thereby achieved that residues or accumulated sludge material in both circumferential directions can be pushed away from the stripping according to the invention. An accumulation of material on only one side of the associated outlet openings of the die is reliably avoided. Brief description of the drawings
Nachfolgend wird ein Ausführungsbeispiel der erfindungsgemäßen Lösung anhand der beigefügten schematischen Zeichnungen näher erläutert. Es zeigt: Fig. 1 eine perspektivische Ansicht eines Ausführungsbeispiels einer erfindungsgemäßen Vorrichtung zum Granulieren von Schlamm und An exemplary embodiment of the solution according to the invention will be explained in more detail below with reference to the attached schematic drawings. 1 shows a perspective view of an embodiment of a device according to the invention for granulating sludge and
Fig. 2 den Schnitt II - II gemäß Fig. 1. 2 shows the section II - II according to FIG. 1.
Detaillierte Beschreibung des Ausführungsbeispiels Detailed description of the embodiment
In den Fig. 1 und 2 ist ein eine Vorrichtung 10 zum Granulieren eines Schlammes 12 veranschaulicht, bei der der Schlamm 12 mittels einer Hauptzuleitung 14 durch mehrere daran angeschlossene Ventile 16 in jeweils zugehörige Einzelzuleitungen 18 verteilt wird. Die Einzelzuleitungen 18 führen jeweils an eine Stelle der Längs- erstreckung eines Stützrohrs 20, an dem sie dort mittels je eines Leitungsanschlusses 24 fluidleitend angekoppelt sind. Das Stützrohr 20 ist mittels einer Rohr- halterung 22 ortsfest gelagert. In der Rohrhalterung 22 sind unter anderem Sichtfenster 26 eingelassen, mittels denen einem Bediener der Vorrichtung 10 eine Sicht unter das Stützrohr 20 gewährt werden kann. In dem Stützrohr 20 befindet sich eine hohlzylindrische Matrize 28, deren Außendurchmesser nur geringfügig kleiner ist, als der Innendurchmesser des Stützrohrs 20. Die hohlzylindrische Matrize 28 erstreckt sich im Wesentlichen über die gesamte Länge des Stützrohrs 20 und weist in ihrem bezogen auf die Fig. 2 oberen Abschnitt jeweils Einlassöffnungen 30 auf, durch die hindurch zu granulierender Schlamm 12 dann aus den Einzelzuleitungen 18 und den zugehörigen Leitungsanschlüssen 24 in das Innere der hohlzylindrischen Matrize 28 eingeführt werden kann. Ferner befindet sich an dem bezogen auf die Fig. 2 unteren Abschnitt der Matrize 28 in deren Längsrichtung eine Reihe von Auslassöffnungen 32. Durch diese Auslassöffnungen 32 kann der Schlamm 12 dann wieder aus der Matrize 28 ausgeführt werden, wobei sich auch im Stützrohr 20 deckungsgleiche Öffnungen befinden, die vorliegend aber nicht dargestellt sind. 1 and 2, an apparatus 10 for granulating a slurry 12 is illustrated, in which the slurry 12 is distributed by means of a main supply line 14 through a plurality of valves 16 connected thereto into respectively associated individual supply lines 18. The individual supply lines 18 each lead to a location of the longitudinal extension of a support tube 20, to which they are coupled there in a fluid-conducting manner by means of a respective line connection 24. The support tube 20 is mounted by means of a pipe holder 22 stationary. In the pipe holder 22, among other viewing window 26 are recessed, by means of which an operator of the device 10 can be granted a view under the support tube 20. In the support tube 20 is a hollow cylindrical die 28, whose outer diameter is only slightly smaller than the inner diameter of the support tube 20. The hollow cylindrical die 28 extends substantially over the entire length of the support tube 20 and has in their reference to FIG Upper portion each inlet openings 30, can then be introduced through the granulate to be granulated sludge 12 from the individual supply lines 18 and the associated line terminals 24 in the interior of the hollow cylindrical die 28. Furthermore, a row of outlet openings 32 is located on the lower section of the female mold 28 with reference to FIG. 2 in its longitudinal direction. The sludge 12 can then be carried out again from the female mold 28 through these outlet openings 32, wherein congruent openings are also formed in the support tube 20 are located, which are present but not shown.
Im Inneren der hohlzylindrischen Matrize 28 befindet sich koaxial zu dieser ein Abstreifer 34, der in der Matrize 28 rotiert und damit derart über die Auslassöffnungen 32 streicht, dass der durch diese Auslassöffnungen 32 heraus gedrängte Schlamm 12 portioniert bzw. granuliert wird. In the interior of the hollow cylindrical die 28 is located coaxially to this a scraper 34 which rotates in the die 28 and thus sweeps over the outlet openings 32, that of the these outlets 32 pushed out sludge 12 is portioned or granulated.
Der Abstreifer 34 ist dazu mit mehreren plattenförmigen Schabern bzw. Messern 36 versehen, die in Längsrichtung bzw. Axialrichtung des Abstreifers 34 aufeinander folgend und in Umfangsrichtung relativ zueinander versetzt an einer Messerhalterung 38 im Wesentlichen in radialer Richtung bewegbar gehaltert sind. Die Messerhalterung 38 ist mittels eines Rohrs 40 gestaltet, das sich ebenfalls koaxial zur hohlzylindrischen Matrize 28 erstreckt und dabei einen Außendurchmesser von ca. 1/2 bis 2/3 des Innendurchmessers 44 der Matrize 28 aufweist. In demFor this purpose, the scraper 34 is provided with a plurality of plate-shaped scrapers or knives 36, which are mounted so as to be movable in the longitudinal direction or axial direction of the scraper 34 and displaceable circumferentially relative to one another on a knife holder 38, essentially in the radial direction. The knife holder 38 is designed by means of a tube 40 which also extends coaxially to the hollow cylindrical die 28 and thereby has an outer diameter of about 1/2 to 2/3 of the inner diameter 44 of the die 28. By doing
Rohr 40 sind einander jeweils diametral gegenüberliegende Längsschlitze 42 ausgebildet, in denen je eines der Messer 36 mit einem Spielmaß 46 in Umfangsrichtung von ca. 1/2 der Messerdicke bzw. von vorliegend zwischen 2 % und 3 % des Innendurchmessers der hohlzylindrischen Matrize 28 gehaltert ist. Das jeweilige Messer 36 ist dabei in den beiden zugehörigen Längsschlitzen 42 seiner Messerhaltung 38 ansonsten frei bewegbar und wird damit während der Rotation des Ab- streifers 34 von seinem Eigengewicht bezogen auf die Fig. 2 nach unten hin und in Richtung auf die Auslassöffnungen 32 gedrängt. Die Messer 36 drängen beim Ü- berstreichen der zugehörigen Auslassöffnungen 32, also aufgrund ihres Eigengewichts, radial nach unten. Die Messer 36 liegen entsprechend entweder unmittel- bar an der Innenseite der hohlzylindrischen Matrize 28 an deren unterem Bereich an oder sie streichen dort über Schlammmaterial hinweg, welches sich an den Rändern der Auslassöffnungen 32 gegebenenfalls angesammelt hat. Die einzelnen Messer 36 weisen dabei jeweils eine Messerhöhe 48 auf, die kleiner ist, als der Innendurchmesser 44 der hohlzylindrischen Matrize 28, nämlich vorliegend zwischen 96 % und 97 % des Innendurchmessers 44 der hohlzylindrischen Matrize 28. Die Messer 36 haben also hinsichtlich des Innendurchmessers 44 der hohlzylindrischen Matrize 28 innerhalb dieser ebenfalls etwas Spiel bzw. Bewegungsfreiheit, um in gewissen Umfang gestautes Schlammmaterial übersteigen zu können und die Rotationsbewegung des Abstreifers 34 nicht zu blockieren. Tube 40 are each formed diametrically opposite longitudinal slots 42, in each of which one of the blades 36 is supported with a clearance 46 in the circumferential direction of about 1/2 of the blade thickness or of presently between 2% and 3% of the inner diameter of the hollow cylindrical die 28 , The respective knife 36 is otherwise freely movable in the two associated longitudinal slots 42 of its knife holder 38 and is thus moved during the rotation of the cutter. With reference to FIG. 2, the stripper 34 is pushed downwards towards its outlet openings 32 with respect to its own weight and with reference to FIG. The blades 36 urge radially when passing over the associated outlet openings 32, that is, due to their own weight. Accordingly, the knives 36 either lie directly against the inside of the hollow-cylindrical die 28 at the lower region thereof or strike over sludge material which has possibly accumulated at the edges of the outlet openings 32. The individual knives 36 each have a knife height 48 which is smaller than the inner diameter 44 of the hollow cylindrical die 28, namely presently between 96% and 97% of the inner diameter 44 of the hollow cylindrical die 28. The knives 36 thus have the inner diameter 44 the hollow cylindrical die 28 within this also some play or freedom of movement to be able to exceed to a certain extent dammed up mud material and not to block the rotational movement of the scraper 34.
Für die Rotations- bzw. Drehbewegung des Abstreifers 34 ist dabei an einem Ende des Stützrohres 20 ein Antrieb 50 vorgesehen, mittels dem der Abstreifer 34 hinsichtlich seiner Rotationsrichtung alternierend rotiert werden kann. Der Abstreifer 34 kann also sowohl rechtsherum als auch linksherum gedreht werden. Mit dieser alternierenden Drehung ist es möglich, die Abstreifrichtung der Messer 36 über die Auslassöffnungen 32 hinweg zu wechseln. Die Auslassöffnungen 32 werden also bezogen auf die Schnittdarstellung gemäß Fig. 2 einmal von links und einmal von rechts her überstrichen. Auf diese Weise ist es möglich, dass For the rotational or rotational movement of the scraper 34, a drive 50 is provided at one end of the support tube 20, by means of which the scraper 34 can be rotated alternately with respect to its direction of rotation. The wiper 34 can thus be rotated both clockwise and anti-clockwise. With this alternating rotation, it is possible to change the stripping direction of the blades 36 across the exhaust ports 32. The outlet openings 32 are thus covered with respect to the sectional view of FIG. 2 once from the left and once from the right. In this way it is possible that
Schlammrückstände, die sich an einer Seite von einer der Auslassöffnungen 32 angesammelt haben, beim Rückstreichen des zugehörigen Messers 36 entfernt werden. Sludge residues that have accumulated on one side of one of the outlet openings 32 are removed when repainting the associated blade 36.
Ferner ist anzumerken, dass das Rohr 40 sowie die Messer 36 jeweils mit Durchgangsöffnungen 52 bzw. 54 gestaltet sind. Die Durchgangsöffnung 52 durchsetz- ten dabei die Wand des Rohrs 40 in dessen Mitte quer zur Ausrichtung des jeweils benachbarten Messers 36. Auch die Durchgangsöffnungen 54 durchsetzen das jeweilige Messer 36 mittig quer zu dessen Scheibenebene 56. It should also be noted that the tube 40 and the blades 36 are each formed with passage openings 52 and 54, respectively. The passage opening 52 penetrate th the wall of the tube 40 in the middle transversely to the orientation of the respective adjacent through the knife 36. The through holes 54 also pass through the respective knife 36 centrally transversely to its disc plane 56th
Die derart mittels des Rohrs 40 und dessen Längsschlitzen 42 mit Spiel an ihren gegenüberliegenden Endbereichen 58 und 60 gehalterten Messer 36 sind im Übrigen an diesen Endbereichen 58 und 60 im Querschnitt V-förmig gestaltet, wobei die beiden Flanken bzw. Schenkel der V-Form jeweils zur Innenseite der hohlzylindrischen Matrize 28 gewandt sind. Abschließend sei angemerkt, dass sämtlichen Merkmalen, die in den Anmeldungsunterlagen und insbesondere in den abhängigen Ansprüchen genannt sind, trotz dem vorgenommenen formalen Rückbezug auf einen oder mehrere bestimmte Ansprüche, auch einzeln oder in beliebiger Kombination eigenständiger Schutz zukommen soll. The thus held by means of the tube 40 and its longitudinal slots 42 with play at their opposite end portions 58 and 60 knives 36 are otherwise V-shaped in cross-section at these end portions 58 and 60, wherein the two flanks or legs of the V-shape respectively to the inside of the hollow cylindrical die 28 are turned. Finally, it should be noted that all the features that are mentioned in the application documents and in particular in the dependent claims, in spite of the formal reference back to one or more specific claims, even individually or in any combination should receive independent protection.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
10 Vorrichtung 10 device
12 Schlamm  12 mud
14 Hauptzuleitung  14 main supply line
16 Ventil  16 valve
18 Einzelzuleitung  18 individual supply line
20 Stützrohr  20 support tube
22 Rohrhalterung  22 pipe support
24 Leitungsanschluss  24 pipe connection
26 Sichtfenster  26 viewing window
28 Matrize  28 matrix
30 Einlassöffnung in der Matrize 30 inlet opening in the die
32 Auslassöffnung in der Matrize32 outlet opening in the die
34 Abstreifer 34 scrapers
36 Messer  36 knives
38 Messerhalterung  38 knife holder
40 Rohr  40 pipe
42 Längsschlitz  42 longitudinal slot
44 Innendurchmesser  44 inner diameter
46 Spielmaß  46 game size
48 Messerhöhe  48 knife height
50 Antrieb  50 drive
52 Durchgangsöffnung des Rohres 52 passage opening of the tube
54 Durchgangsöffnung des Messers54 Through opening of the knife
56 Scheibenebene des Messers56 slice plane of the knife
58 Endbereich 58 end area
60 Endbereich  60 end area

Claims

Ansprüche claims
1 . Vorrichtung (10) zum Granulieren von Schlamm (12) mit einer hohlzylindrischen Matrize (28), in die zu granulierender Schlamm (12) einzupressen ist und in der ein Abstreifer (34) mit mindestens einem Messer (36) rotierend angeordnet ist, dadurch gekennzeichnet, dass das mindestens eine Messer (36) am rotierenden Abstreifer (34) mittels einer Messerhalterung (38) im Wesentlichen radial beweg- bar gehaltert ist. 1 . Apparatus (10) for granulating sludge (12) with a hollow cylindrical die (28) into which sludge (12) to be granulated is to be pressed and in which a scraper (34) is arranged to rotate with at least one knife (36) in that the at least one blade (36) on the rotating scraper (34) is held essentially radially movable by means of a knife holder (38).
2. Vorrichtung zum Granulieren von Schlamm nach Anspruch 1 , 2. Apparatus for granulating sludge according to claim 1,
dadurch gekennzeichnet, dass an der Messerhalterung (38) das mindestens eine im Wesentlichen radial bewegbar gehalterte Messer (36) seinem Eigengewicht unterliegend frei verschiebbar ist. characterized in that on the knife holder (38) the at least one substantially radially movably supported blade (36) is freely displaceable under its own weight.
3. Vorrichtung zum Granulieren von Schlamm nach Anspruch 2, 3. Apparatus for granulating sludge according to claim 2,
dadurch gekennzeichnet, dass das frei verschiebbare Messer (36) an der Messerhalterung (38) in Umfangsrichtung der hohlzylindrischen Matrize (28) mit einem Spielmaß (46) von zwischen 1 % bis 4 % des Innendurchmessers (44) der hohlzylindrischen Matrize (28), bevorzugt zwischen 2 % und 3 % des Innendurchmessers (44) der hohlzylindrischen Matrize (28), gehaltert ist. characterized in that the freely displaceable blade (36) on the blade holder (38) in the circumferential direction of the hollow cylindrical die (28) with a clearance (46) of between 1% to 4% of the inner diameter (44) of the hollow cylindrical die (28), Preferably between 2% and 3% of the inner diameter (44) of the hollow cylindrical die (28) is supported.
4. Vorrichtung zum Granulieren von Schlamm nach einem der Ansprüche 1 bis 3, 4. An apparatus for granulating sludge according to any one of claims 1 to 3,
dadurch gekennzeichnet, dass an der Messerhalterung (38) mehrere einzelne Messer (36) in axialer Richtung der hohlzylindrischen Matrize (28) aufeinander folgend angeordnet sind. characterized in that on the knife holder (38) a plurality of individual knives (36) in the axial direction of the hollow cylindrical die (28) are arranged consecutively.
5. Vorrichtung zum Granulieren von Schlamm nach Anspruch 4, 5. Apparatus for granulating sludge according to claim 4,
dadurch gekennzeichnet, dass die mehreren einzelnen Messer (36) in Umfangs- richtung der hohlzylindrischen Matrize (28) versetzt angeordnet sind. characterized in that the plurality of individual knives (36) are arranged offset in the circumferential direction of the hollow cylindrical die (28).
6. Vorrichtung zum Granulieren von Schlamm nach einem der Ansprüche 1 bis 5, A sludge granulating apparatus according to any one of claims 1 to 5,
dadurch gekennzeichnet, dass das mindestens eine im Wesentlichen radial bewegbar gehalterte Messer (36) eine Messerhöhe (48) aufweist, die zwischen 95 % bis 98 % des Innendurchmessers (44) der hohlzylindrischen Matrize (28), bevor- zugt zwischen 96 % und 97 % des Innendurchmessers (44) der hohlzylindrischen Matrize (28), beträgt. characterized in that the at least one substantially radially movably supported blade (36) has a blade height (48) which is between 95% to 98% of the inside diameter (44) of the hollow cylindrical die (28), preferably between 96% and 97 % of the inner diameter (44) of the hollow cylindrical die (28).
7. Vorrichtung zum Granulieren von Schlamm nach einem der Ansprüche 1 bis 6, A sludge granulating apparatus according to any one of claims 1 to 6,
dadurch gekennzeichnet, dass die Messerhalterung (38) mittels eines sich axial in der hohlzylindrischen Matrize (28) erstreckenden Rohres (40) gebildet ist. characterized in that the knife holder (38) by means of an axially in the hollow cylindrical die (28) extending tube (40) is formed.
8. Vorrichtung zum Granulieren von Schlamm nach Anspruch 7, 8. An apparatus for granulating sludge according to claim 7,
dadurch gekennzeichnet, dass das Rohr (40) mit mindestens einer Durchgangs- Öffnung (52) versehen ist, die sich quer zur Ausrichtung des mindestens einen im Wesentlichen radial bewegbar gehalterten Messers (36) erstreckt. characterized in that the tube (40) is provided with at least one passage opening (52) extending transversely to the orientation of the at least one substantially radially movably supported blade (36).
9. Vorrichtung zum Granulieren von Schlamm nach einem der Ansprüche 1 bis 8, 9. The apparatus for granulating sludge according to any one of claims 1 to 8,
dadurch gekennzeichnet, dass das mindestens eine im Wesentlichen radial bewegbar gehalterte Messer (36) von der Messerhalterung (38) an seinen zwei gegenüberliegenden Endbereichen (58, 60) gehaltert ist. characterized in that the at least one substantially radially movably supported blade (36) of the knife holder (38) at its two opposite end portions (58, 60) is supported.
10. Verfahren zum Betreiben einer Vorrichtung (10) zum Granulieren von Schlamm (12), insbesondere nach einem der Ansprüche 1 bis 9, bei dem in eine hohlzylindrische Matrize (28) zu granulierender Schlamm (12) eingepresst und in der Matrize (28) ein Abstreifer (34) rotiert wird, 10. A method for operating a device (10) for granulating sludge (12), in particular according to one of claims 1 to 9, in which in a hollow cylindrical die (28) to be granulated sludge (12) pressed and in the die (28) a scraper (34) is rotated,
dadurch gekennzeichnet, dass der Abstreifer (34) hinsichtlich seiner Rotationsrichtung alternierend rotiert wird. characterized in that the scraper (34) is rotated alternately with respect to its direction of rotation.
EP14835654.6A 2014-11-14 2014-11-14 Device for granulating sludge and method for operating said device Withdrawn EP3218315A1 (en)

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CN107108299A (en) 2017-08-29
DE112014007167A5 (en) 2017-07-20
TR201512565T1 (en) 2018-03-21
WO2016074654A1 (en) 2016-05-19
CA2967096A1 (en) 2016-05-19

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