EP0801995B1 - Plant for separating by screening a fraction of small grain size from crushed material - Google Patents

Plant for separating by screening a fraction of small grain size from crushed material Download PDF

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Publication number
EP0801995B1
EP0801995B1 EP96105762A EP96105762A EP0801995B1 EP 0801995 B1 EP0801995 B1 EP 0801995B1 EP 96105762 A EP96105762 A EP 96105762A EP 96105762 A EP96105762 A EP 96105762A EP 0801995 B1 EP0801995 B1 EP 0801995B1
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EP
European Patent Office
Prior art keywords
drum
plant according
sieve drum
housing
flow nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96105762A
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German (de)
French (fr)
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EP0801995A1 (en
Inventor
Felix Cloos
Claus Gronholz
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.)
Umwelt-Technics-Nord GmbH
Umwelt Technics Nord GmbH
Original Assignee
Umwelt-Technics-Nord GmbH
Umwelt Technics Nord GmbH
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Filing date
Publication date
Application filed by Umwelt-Technics-Nord GmbH, Umwelt Technics Nord GmbH filed Critical Umwelt-Technics-Nord GmbH
Priority to DE59602162T priority Critical patent/DE59602162D1/en
Priority to DK96105762T priority patent/DK0801995T3/en
Priority to ES96105762T priority patent/ES2135131T3/en
Priority to AT96105762T priority patent/ATE180995T1/en
Priority to EP96105762A priority patent/EP0801995B1/en
Publication of EP0801995A1 publication Critical patent/EP0801995A1/en
Application granted granted Critical
Publication of EP0801995B1 publication Critical patent/EP0801995B1/en
Priority to GR990401564T priority patent/GR3030489T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/50—Cleaning
    • B07B1/55—Cleaning with fluid jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/08—Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements

Definitions

  • the invention relates to a plant for screening a fraction of small grain sizes from one by means of a Crusher or similar comminuted goods according to the generic term of claim 1.
  • the recycling material should be one desired grain line so that the individual Fractions for desired uses, for example in road construction.
  • a drum screen which is used for the separation from one mixture of different materials with high Moisture level serves.
  • knives, nozzles and brushes are provided, which when rotating the Make sure the holes in the sieve are clean.
  • a drum screen has become known to be provided for metallic powder in the range of 0.1 mm Grain size and smaller.
  • a nozzle plate attached to a supply line for a Fluid is connected.
  • a screening drum for e.g. fibrous compost A compressed air nozzle tube in the upper area of the sieve drum arrange that by a compressor with compressed air is supplied.
  • the nozzle tube serves the sieve drum of fiber parts that are in the sieve drum have fixed.
  • the invention has for its object a system for Sifting a fraction of smaller grain sizes out of one material crushed by means of a crusher or the like to create, in which the throughput can be increased.
  • a compressed gas used the exhaust gas of a diesel engine is used as a compressed gas used the exhaust gas of a diesel engine.
  • Crushing plants usually use a generator that generates the electricity generated for the electric motor that drives the crusher.
  • a diesel engine is used to drive the generator.
  • the Exhaust gas from a diesel engine has a temperature of over 500 ° C and is also under a sufficiently high pressure so that it can be used to supply the flow nozzle. In this way it is possible to use a large part of the energy loss of the diesel engine in a screening plant for this use, increase the throughput and a trouble-free To ensure operation.
  • soot particle filter To prevent contamination of the screenings from soot particles prevent it, it is recommended to install a soot particle filter, into which the unpurified exhaust gas is introduced. It is possible to use a known filter with a degree of particle separation get up to 95%.
  • the flow nozzle adjustable via an adjustment drive is to change the height of the entry area of the flow into the sieve drum.
  • the flow nozzle can after a Another embodiment of the invention as an opening in a Plate be formed with the adjusting device is coupled.
  • the plate extends approximately tangentially to the screening drum and relocated during an adjustment the relative position of the nozzle opening and thus also the position with respect to the drum in which the gas flow into the sieve drum entry.
  • the location of the flow nozzle can be below other dependent on the pressure of the Gas. Therefore, an embodiment of the invention provides that a control device for the adjustment device is provided as well as a pressure sensor in front of the flow nozzle, which measures the pressure of the gas, the adjusting device the flow nozzle is adjusted depending on the pressure.
  • the fluid entered must escape from the screen drum again.
  • the air outlet can be almost extend the entire face, being careful must be that the radially outer area free remains for the discharge of the coarser material.
  • an apron or the like may be provided by the material is pushed aside so that as little as possible Unfiltered gas is released.
  • the air outlet is otherwise provided with a filter, for example a filter mat, which prevents very fine particles spread outward in dust.
  • For suppression water can also be used to form dust be, that by means of spray nozzles on the emerging coarser Material is sprayed.
  • Another outlet can be through at least one in the top Area of the housing provided connection, which is also provided with a filter device.
  • the filtered gas can be connected to the Feed line for the flow nozzle to be connected to the reuse escaping gas.
  • In the return line can be a heater according to an embodiment of the invention be provided which the recirculated gas to the temperature of the gas in the supply line.
  • the wall of the housing for the sieve drum with is provided with thermal insulation.
  • a sieve drum 10 is inclined somewhat to the horizontal Axis in a housing, as indicated at 12 in FIG. 1 is rotatably mounted. In the present case three drives 14 arranged in the upper area.
  • the material inlet is indicated by an arrow 16. He is itself at the higher end of the screening drum 10.
  • the Material outlet for the screenings is marked with the arrow 18.
  • the screenings should be in the grain size range 0 to 4.
  • the unscreened good is made removed from the drum 10 at 20.
  • the sieve drum At the front end is the sieve drum with a circumferential direction to provide extending outlet for this good.
  • a gas outlet 22 for example in the form of lamellas, to which a filter 24, for example in the form of a filter mat is.
  • the function of the gas outlet 22 is shown below still explained.
  • the housing 12 which, moreover, with thermal insulation is provided, has an outlet 26 in the lower region for the screenings, which falls on a take-off belt 28, the individual is not shown.
  • Slightly above the Outlet 26 on the upwardly moving part of the screening drum 10 that rotates clockwise is one Plate 30 arranged a relatively close distance to the drum 10 and in the direction of the double arrow 32 is adjustably mounted in the housing 12.
  • the Plate 30 has a nozzle opening 34.
  • the plate 30 is located at the end of an expanding line 36, with the exhaust of a diesel engine (not shown) connected is.
  • the diesel engine is part of it, for example of a generator that supplies energy for ensures an electric motor that one not shown Drives crusher. It also supplies the electric motor or the motors for driving the screening drum 10.
  • a return line 50 into line 36 is introduced.
  • one Heater 52 provided to the recycle gas bring it back to the temperature of the exhaust gas.
  • the Filter device 48 separated particles pass over a shaft 54 to a screw conveyor 56, which fine screened material is transported to take-off belt 28.
  • the plate 30 is by means of an adjusting cylinder 58 adjustable in the direction of the double arrow 32 depending on the Operating conditions, i.e. Condition of the sieved Good and the pressure on line 36.
  • a pressure transmitter (not shown) can be provided which connected to a control device, also not shown which actuates the adjusting cylinder 58 in dependence from the measured pressure.
  • An adjustment can be made analogously of the circularly bent baffle 42 made become.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Disintegrating Or Milling (AREA)
  • Testing Of Engines (AREA)

Abstract

The device has a driven screening drum (10) and a lower discharge housing for the separated material. A nozzle jet (34), which is connected to a pressurised gas source, is located on the lower upward-moving section of the drum. The nozzle directs a gas jet into the drum, upwards and at an angle against the opposite drum section. The screening drum contains a deflection plate (42). This is located in the circumferential area between nozzle the jet and the crest of the drum. The pressurised gas source consists of the exhaust gases from the Diesel engine of a current generator, which supplies the energy for the breaker and the screening drum.

Description

Die Erfindung bezieht sich auf eine Anlage zur Absiebung einer Fraktion kleiner Korngrößen aus einem mittels eines Brechers oder dergleichen zerkleinerten Gut nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a plant for screening a fraction of small grain sizes from one by means of a Crusher or similar comminuted goods according to the generic term of claim 1.

Es ist bekannt, Bauschutt mit Hilfe von Brecheranlagen wiederverwendbar zu machen. Das Recyclingmaterial soll einer gewünschten Körnungslinie entsprechen, damit die einzelnen Fraktionen für gewünschte Einsatzzwecke, beispielsweise im Straßenbau, zur Verfügung stehen. It is known to build rubble with the help of crushers to make it reusable. The recycling material should be one desired grain line so that the individual Fractions for desired uses, for example in road construction.

Es ist bekannt, Feinanteile, beispielsweise in der Körnungsgröße von 0 bis 4 mit Hilfe eines Trommelsiebes zu trennen. Es besteht jedoch die Gefahr, daß das Trommelsieb zusetzt, insbesondere wenn das Material eine gewisse Feuchtigkeit aufweist, so daß es zu Betriebsunterbrechungen kommen kann. Ferner ist der Durchsatz eines Trommelsiebes relativ gering.It is known to have fine particles, for example in the grain size from 0 to 4 with the help of a drum screen separate. However, there is a risk that the drum screen adds, especially if the material has a certain Has moisture so that there is downtime can come. Furthermore, the throughput of a drum screen relatively low.

Aus SU-A-906 627 ist ein Trommelsieb bekannt, das für die Trennung von einem aus verschiedenen Materialien zusammengesetzten Gemisch mit hohem Feuchtigskeitsgrad dient. Um das Zusetzten des Trommelsiebes zu vermeiden, sind an dessen Umfang Messer, Düsen und Bürsten vorgesehen, die bei der Drehung der Trommel für die Sauberkeit der Löcher des Siebes sorgen. From SU-A-906 627 a drum screen is known which is used for the separation from one mixture of different materials with high Moisture level serves. To avoid clogging of the drum screen, are on the scope of which knives, nozzles and brushes are provided, which when rotating the Make sure the holes in the sieve are clean.

Aus der DE 39 05 945 ist bekannt geworden, ein Trommelsieb für metallisches Pulver vorzusehen im Bereich von 0,1 mm Korngröße und kleiner. Um die Klemmkornbildung im Betrieb zu verhindern, weist das Trommelsieb im unteren Bereich ein Düsenblech auf, das an eine Versorgungsleitung für ein Fluid angeschlossen ist. Zwischen dem Düsenblech und der Trommel wird eine Verwirbelung des Aufgabegutes verhindert beim Einfüllen in Siebgutkammern des die Trommel umgebenden Gehäuses. Aus der DE 37 20 490 ist ferner bekannt geworden, bei einer Siebtrommel für z.B. faserhaltigen Kompost im oberen Bereich der Siebtrommel ein Druckluftdüsenrohr anzuordnen, das von einem Kompressor mit Druckluft versorgt wird. Das Düsenrohr dient dazu, die Siebtrommel von Faseranteilen zu reinigen, die sich in der Siebtrommel festgesetzt haben.From DE 39 05 945 a drum screen has become known to be provided for metallic powder in the range of 0.1 mm Grain size and smaller. About the formation of pinch grit in operation To prevent the drum screen in the lower area a nozzle plate attached to a supply line for a Fluid is connected. Between the nozzle plate and the Swirling of the feed material is prevented when filling into screenings chambers of the drum surrounding Housing. From DE 37 20 490 it has also become known with a screening drum for e.g. fibrous compost A compressed air nozzle tube in the upper area of the sieve drum arrange that by a compressor with compressed air is supplied. The nozzle tube serves the sieve drum of fiber parts that are in the sieve drum have fixed.

Aus der DE 28 06 861 ist bekannt geworden, bei einer Siebzum Reinigen von Getreide mit Hilfe eines Gebläses axial einen Luftstrom in der Trommel zu erzeugen. Aus der DE 24 26 858 ist bekannt, bei einer Siebtrommel zum Trennen von Metallspänen an bearbeiteten Werkstücken an der vorderen Stirnseite über ein Gebläse Luft unter Druck axial einzuleiten. Der Luftstrom erfaßt die Späne am Auslaßende der Siebtrommel und bläst sie in den vorderen oder mittleren Bereich der Siebtrommel zurück. Aus der DE 19 23 230 ist ferner bekannt geworden, zur Reinigung von einer Siebtrommel anhaftenden Fasern eine Düse einzusetzen, die im oberen Bereich der Siebtrommel angeordnet ist. Aus der DE 33 15 991 ist schließlich bekannt geworden, in einer kaskadenartigen Siebanordnung, die von einer Zerkleinerungsvorrichtung beschickt wird, einen warmen Luftstrom einzuführen, um das Siebgut zu trocknen.It has become known from DE 28 06 861 for a sieve Cleaning grain with the help of a blower axially to generate an air flow in the drum. From the DE 24 26 858 is known in a sieve drum for separation of metal chips on machined workpieces on the front end using an air blower under pressure initiate axially. The air flow catches the chips at the outlet end the screen drum and blows it in the front or middle of the screen drum back. From DE 19 23 230 has also become known for cleaning one Sieve drum adhering fibers to insert a nozzle that is arranged in the upper region of the screening drum. From the DE 33 15 991 has finally become known in one cascade-like sieve arrangement by a shredder is fed with a warm air flow to dry the screenings.

Der Erfindung liegt die Aufgabe zugrunde, eine Anlage zur Absiebung einer Fraktion kleinerer Korngrößen aus einem mittels eines Brechers oder dergleichen zerkleinerten Gut zu schaffen, bei der der Durchsatz erhöht werden kann.The invention has for its object a system for Sifting a fraction of smaller grain sizes out of one material crushed by means of a crusher or the like to create, in which the throughput can be increased.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst.This object is achieved by the features of Claim 1 solved.

Bei der erfindungsgemäßen Anlage wird ebenfalls mit Hilfe einer Strömungsdüse Druck unter Gas von außen gegen die Siebtrommel gerichtet. Die Anordnung der Strömungsdüse ist jedoch im unteren Bereich am aufwärts sich bewegenden Abschnitt der Siebtrommel. Dadurch wird das von der Siebtrommel aufwärts bewegte Gut teilweise gegen ein Umlenkblech geblasen und das bewegte Gut gegen die gegenüberliegende Innenseite der Siebtrommel gefördert, wo es dann teilweise austritt und zwischen Trommel und Gehäuse zum Auslaß gelenkt wird. Mit Hilfe einer derartigen Maßnahme, die sich bei sehr feinem Gut bei entsprechendem Strömungsdruck leicht bewerkstelligen läßt, wird die zur Verfügung stehende wirksame Siebfläche deutlich erhöht. Der Durchsatz pro Zeiteinheit wird signifikant erhöht. Darüber hinaus wird ein störungsfreier Betrieb erhalten, weil die Strömungsdüse verhindert, daß sich die Maschen des Siebes zusetzen. Dieser Effekt wird noch verbessert, wenn das Gas erwärmt ist. Das abzusiebende Gut wird dadurch getrocknet und neigt daher nicht zu einem Anhaften an der Innenseite der Siebtrommel.In the system according to the invention is also with the help a flow nozzle pressure under gas from outside against the Sieve drum directed. The arrangement of the flow nozzle is however in the lower area on the upward moving section the sieve drum. This will remove the screen drum goods moving upwards partially against a deflection plate blown and the moving good against the opposite Conveyed inside of the drum where it is then partially exits and between the drum and the housing Outlet is directed. With the help of such a measure, which are in the case of very fine material with the corresponding flow pressure can be easily accomplished, it becomes available effective sieve area significantly increased. The throughput per time unit is significantly increased. About that In addition, trouble-free operation is obtained because the Flow nozzle prevents the mesh of the sieve clog. This effect is enhanced when the gas is heated. The material to be screened is thereby dried and therefore does not tend to stick to the inside the sieve drum.

Nach einer Ausgestaltung der Erfindung wird als Druckgas das Abgas eines Dieselmotors verwendet. Brecheranlagen verwenden in aller Regel ein Stromaggregat, das den Strom für den Elektromotor erzeugt, der den Brecher antreibt. Zum Antrieb des Stromaggregates dient ein Dieselmotor. Das Abgas eines Dieselmotors hat eine Temperatur von über 500°C und steht auch unter einem ausreichend hohen Druck, so daß es zur Versorgung der Strömungsdüse verwendet werden kann. Auf diese Weise ist es möglich, einen großen Teil der Verlustenergie des Dieselmotors bei einer Siebanlage dafür einzusetzen, den Durchsatz zu erhöhen und einen störungsfreien Betrieb zu gewährleisten.According to one embodiment of the invention is used as a compressed gas used the exhaust gas of a diesel engine. Crushing plants usually use a generator that generates the electricity generated for the electric motor that drives the crusher. A diesel engine is used to drive the generator. The Exhaust gas from a diesel engine has a temperature of over 500 ° C and is also under a sufficiently high pressure so that it can be used to supply the flow nozzle. In this way it is possible to use a large part of the energy loss of the diesel engine in a screening plant for this use, increase the throughput and a trouble-free To ensure operation.

Um eine Verschmutzung des Siebgutes durch Rußpartikel zu verhindern, empfiehlt es sich, ein Rußpartikel-Filter einzubauen, in das das ungereinigte Abgas eingeleitet wird. Es ist möglich, mit bekannten Filtern einen Partikel-Abscheidungsgrad bis zu 95 % zu erhalten.To prevent contamination of the screenings from soot particles prevent it, it is recommended to install a soot particle filter, into which the unpurified exhaust gas is introduced. It is possible to use a known filter with a degree of particle separation get up to 95%.

Nach einer Ausgestaltung der Erfindung ist vorgesehen, daß die Strömungsdüse über einen Verstellantrieb verstellbar ist zur Änderung der Höhe des Eintrittsbereichs der Strömung in die Siebtrommel. Die Strömungsdüse kann nach einer weiteren Ausgestaltung der Erfindung als Öffnung in einer Platte ausgebildet sein, die mit der Verstellvorrichtung gekoppelt ist. Die Platte erstreckt sich annähernd tangential zur Siebtrommel und verlagert bei einer Verstellung die Relativlage der Düsenöffnung und damit auch die Lage bezüglich der Trommel, in der der Gasstrom in die Siebtrommel eintritt. Die Lage der Strömungsdüse kann unter anderem auch abhängig gemacht werden von dem Druck des Gases. Daher sieht eine Ausgestaltung der Erfindung vor, daß eine Steuervorrichtung für die Verstellvorrichtung vorgesehen ist sowie ein Druckgeber vor der Strömungsdüse, der den Druck des Gases mißt, wobei die Verstellvorrichtung die Strömungsdüse in Abhängigkeit vom Druck verstellt.According to one embodiment of the invention it is provided that the flow nozzle adjustable via an adjustment drive is to change the height of the entry area of the flow into the sieve drum. The flow nozzle can after a Another embodiment of the invention as an opening in a Plate be formed with the adjusting device is coupled. The plate extends approximately tangentially to the screening drum and relocated during an adjustment the relative position of the nozzle opening and thus also the position with respect to the drum in which the gas flow into the sieve drum entry. The location of the flow nozzle can be below other dependent on the pressure of the Gas. Therefore, an embodiment of the invention provides that a control device for the adjustment device is provided as well as a pressure sensor in front of the flow nozzle, which measures the pressure of the gas, the adjusting device the flow nozzle is adjusted depending on the pressure.

Das eingetragene Fluid muß aus der Siebtrommel wieder entweichen. Dies geschieht nach einer Ausgestaltung der Erfindung dadurch, daß an der vorderen Stirnseite der Siebtrommel ein Luftaustritt vorgesehen ist, dem ein Filter vorgeordnet ist. Der Luftaustritt kann sich über nahezu die gesamte Stirnfläche erstrecken, wobei dafür gesorgt werden muß, daß der jeweils radial äußere Bereich frei bleibt für den Austritt des gröberen Materials. Hier kann eine Schürze oder dergleichen vorgesehen werden, die von dem Material beiseite geschoben wird, damit möglichst wenig Gas ungefiltert ins Freie gelangt. Der Luftaustritt ist im übrigen mit einem Filter versehen, beispielsweise einer Filtermatte, welche verhindert, daß sehr feine Partikel sich staubförmig nach außen verbreiten. Zur Unterdrückung einer Staubbildung kann auch Wasser eingesetzt werden, das mittels Sprühdüsen auf das austretende gröbere Material gesprüht wird. The fluid entered must escape from the screen drum again. This takes place according to an embodiment of the invention in that at the front end of the screen drum an air outlet is provided to which a filter is upstream. The air outlet can be almost extend the entire face, being careful must be that the radially outer area free remains for the discharge of the coarser material. Here can an apron or the like may be provided by the material is pushed aside so that as little as possible Unfiltered gas is released. The air outlet is otherwise provided with a filter, for example a filter mat, which prevents very fine particles spread outward in dust. For suppression water can also be used to form dust be, that by means of spray nozzles on the emerging coarser Material is sprayed.

Ein weiterer Auslaß kann durch mindestens einen im oberen Bereich des Gehäuses vorgesehenen Anschluß gebildet sein, der ebenfalls mit einer Filtervorrichtung versehen ist. Das gefilterte Gas kann über eine Rückführleitung mit der Zuführleitung für die Strömungsdüse verbunden sein, um das austretende Gas wiederzuverwenden. In der Rückführleitung kann nach einer Ausgestaltung der Erfindung eine Heizung vorgesehen sein, welche das rückgeführte Gas auf die Temperatur des Gases in der Zuführleitung bringt.Another outlet can be through at least one in the top Area of the housing provided connection, which is also provided with a filter device. The filtered gas can be connected to the Feed line for the flow nozzle to be connected to the reuse escaping gas. In the return line can be a heater according to an embodiment of the invention be provided which the recirculated gas to the temperature of the gas in the supply line.

Da in der Trommel eine Erwärmung des Gutes stattfindet, ist es nach einer Ausgestaltung der Erfindung vorteilhaft, wenn die Wandung des Gehäuses für die Siebtrommel mit einer Wärmeisolierung versehen ist.As the material is heated in the drum, According to an embodiment of the invention, it is advantageous if the wall of the housing for the sieve drum with is provided with thermal insulation.

Die Erfindung wird nachfolgend anhand von Zeichnungen näher erläutert.

Fig. 1
zeigt die Längsansicht einer Siebtrommel nach der Erfindung ohne Gehäuse.
Fig. 2
zeigt schematisch einen Schnitt durch die Siebtrommel nach Fig. 1 entlang der Linie 2 - 2 mit zusätzlichen Komponenten.
The invention is explained in more detail below with reference to drawings.
Fig. 1
shows the longitudinal view of a screening drum according to the invention without a housing.
Fig. 2
shows schematically a section through the screen drum of FIG. 1 along the line 2 - 2 with additional components.

Eine Siebtrommel 10 ist um eine etwas zur Horizontalen geneigte Achse in einem Gehäuse, wie es in Fig. 1 bei 12 angedeutet ist, drehbar gelagert. Im vorliegenden Fall sind drei Antriebe 14 im oberen Bereich angeordnet. Der Materialeinlaß ist durch einen Pfeil 16 angedeutet. Er befindet sich am höher liegenden Ende der Siebtrommel 10. Der Materialauslaß für das Siebgut ist mit dem Pfeil 18 gekennzeichnet. Das Siebgut soll zum Beispiel im Korngrößenbereich 0 bis 4 liegen. Das nicht abgesiebte Gut wird aus der Siebtrommel 10 bei 20 entnommen. Am vorderen Stirnende ist die Siebtrommel mithin mit einem in Umfangsrichtung sich erstreckenden Auslaß für dieses Gut zu versehen. Im übrigen ist die Stirnseite mit einem Gasaustritt 22 versehen, zum Beispiel in Form von Lamellen, denen ein Filter 24, zum Beispiel in Form einer Filtermatte, vorgeordnet ist. Die Funktion des Gasaustritts 22 wird weiter unten noch erläutert.A sieve drum 10 is inclined somewhat to the horizontal Axis in a housing, as indicated at 12 in FIG. 1 is rotatably mounted. In the present case three drives 14 arranged in the upper area. The material inlet is indicated by an arrow 16. He is itself at the higher end of the screening drum 10. The Material outlet for the screenings is marked with the arrow 18. For example, the screenings should be in the grain size range 0 to 4. The unscreened good is made removed from the drum 10 at 20. At the front end is the sieve drum with a circumferential direction to provide extending outlet for this good. in the the other end is provided with a gas outlet 22, for example in the form of lamellas, to which a filter 24, for example in the form of a filter mat is. The function of the gas outlet 22 is shown below still explained.

Das Gehäuse 12, das im übrigen mit einer Wärmeisolation versehen ist, besitzt im unteren Bereich einen Auslaß 26 für das Siebgut, das auf ein Abzugsband 28 fällt, das im einzelnen nicht dargestellt ist. Geringfügig oberhalb des Auslasses 26 am sich nach oben bewegenden Teil der Siebtrommel 10, die sich in Uhrzeigerrichtung dreht, ist eine Platte 30 angeordnet, die einen relativ geringen Abstand zur Siebtrommel 10 aufweist und in Richtung des Doppelpfeils 32 verstellbar im Gehäuse 12 gelagert ist. Die Platte 30 weist eine Düsenöffnung 34 auf. Die Platte 30 befindet sich am Ende einer sich erweiternden Leitung 36, die mit dem Auspuff eines Dieselmotors (nicht gezeigt) verbunden ist. Der Dieselmotor ist zum Beispiel Bestandteil eines Stromaggregats, das die Energieversorgung für einen Elektromotor sicherstellt, der einen nicht gezeigten Brecher antreibt. Es versorgt auch den Elektromotor bzw. die Motoren zum Antrieb der Siebtrommel 10. Eine derartige Betriebsweise für Brecheranlagen bzw. Siebvorrichtungen ist an sich bekannt. Das Abgas gelangt über ein ebenfalls nicht dargestelltes Rußfilter, das nahezu sämtliche Rußpartikel entfernt, in die Leitung 36. Es strömt anschließend durch die Düsenöffnung 34 schräg nach oben in die Siebtrommel 10 hinein, wie durch die Strömung 40 in Fig. 2 angedeutet. Ein entsprechend der Trommelwandung gebogenes Ablenkblech 42, das sich zwischen der Platte 30 und dem Scheitel der Siebtrommel 10 erstreckt, bewirkt eine Umlenkung der Strömung 40 in Richtung gegenüberliegender Trommelwandung. Wie durch den Doppelpfeil 44 angedeutet, kann die Lage des Ablenkblechs 42 verändert werden. Die konstruktiven Einzelheiten hierzu sind nicht dargestellt. Man erkennt daher, daß ein Teil des in Umfangsrichtung mitgenommenen Gutes 46 in der Siebtrommel 10 durch die Gasströmung 40 nach oben gefördert wird gegen das Ablenkblech 42 in Richtung der gegenüberliegenden Siebtrommelwandung. Material mit einer Korngröße kleiner als die Maschenweite der Siebtrommel 10 wird auf diese Weise ausgesiebt. Die wirksame Siebfläche der Siebtrommel 10 wird daher durch diese Maßnahme erheblich vergrößert. Darüber hinaus erfolgt durch die Abgasströmung 40 eine Reinigung des Siebes. Da das Abgas heiß ist, zum Beispiel eine Temperatur von 300 bis 500 °C aufweist, erfolgt auch eine Erwärmung des zu siebenden Gutes und damit eine Trocknung, so daß die Gefahr eines Haftenbleibens in der Siebtrommel vermieden wird.The housing 12, which, moreover, with thermal insulation is provided, has an outlet 26 in the lower region for the screenings, which falls on a take-off belt 28, the individual is not shown. Slightly above the Outlet 26 on the upwardly moving part of the screening drum 10 that rotates clockwise is one Plate 30 arranged a relatively close distance to the drum 10 and in the direction of the double arrow 32 is adjustably mounted in the housing 12. The Plate 30 has a nozzle opening 34. The plate 30 is located at the end of an expanding line 36, with the exhaust of a diesel engine (not shown) connected is. The diesel engine is part of it, for example of a generator that supplies energy for ensures an electric motor that one not shown Drives crusher. It also supplies the electric motor or the motors for driving the screening drum 10. Such Operating mode for crushing plants or screening devices is known per se. The exhaust gas also passes through a Soot filter, not shown, which contains almost all soot particles removed, in line 36. It then flows through the nozzle opening 34 obliquely upwards in sieve drum 10 as seen by flow 40 in Fig. 2 indicated. One bent according to the drum wall Deflector 42, which is between the plate 30th and the apex of the drum 10 extends a deflection of the flow 40 in the direction opposite Drum wall. As indicated by the double arrow 44, the position of the baffle 42 can be changed. The structural details are not shown. It can therefore be seen that part of the circumferential direction Good 46 taken in the screening drum 10 is promoted upwards by the gas flow 40 the baffle 42 in the direction of the opposite Sieve drum wall. Material with a grain size smaller than the mesh size of the screening drum 10 is on this Sifted way. The effective screening surface of the screening drum 10 is therefore significantly increased by this measure. In addition, exhaust gas flow 40 results in a Cleaning the sieve. Because the exhaust gas is hot, for example has a temperature of 300 to 500 ° C, also takes place heating the material to be screened and thus drying it, so that there is a risk of sticking in the screening drum is avoided.

Ein großer Teil der Abluft gelangt über das Filter 24 und den Auslaß 22 gereinigt in die Atmosphäre. Ein anderer Teil wird über einen oberen Auslaß zu einer nicht näher dargestellten Filtervorrichtung 48 geleitet, wobei gereinigte Luft über eine Rückführleitung 50 in die Leitung 36 eingeführt wird. Nach dem Strahlpumpenprinzip wird das rückgeführte Gas wieder über die Düsenöffnung in die Siebtrommel eingeführt. In der Rückführleitung 50 ist eine Heizvorrichtung 52 vorgesehen, um das rückgeführte Gas wieder auf die Temperatur des Abgases zu bringen. Von der Filtervorrichtung 48 abgetrennte Partikel gelangen über einen Schacht 54 zu einem Schneckenförderer 56, der das feine Siebgut zum Abzugsband 28 transportiert.A large part of the exhaust air passes through the filter 24 and outlet 22 cleaned into the atmosphere. Another Part does not become closer via an upper outlet shown filter device 48 passed, cleaned Air via a return line 50 into line 36 is introduced. According to the jet pump principle recirculated gas back into the sieve drum through the nozzle opening introduced. In the return line 50 is one Heater 52 provided to the recycle gas bring it back to the temperature of the exhaust gas. Of the Filter device 48 separated particles pass over a shaft 54 to a screw conveyor 56, which fine screened material is transported to take-off belt 28.

Es versteht sich, daß in Achsrichtung der Siebtrommel 10 mehrere Strömungsdüsen vorgesehen werden, zum Beispiel drei in gleichmäßigen Abständen voneinander. Desgleichen können auch mehrere Auslässe 46 vorgesehen werden. Die Filteranlage 48 kann auch als Entstaubungsanlage mit einem Gebläse ausgeführt sein.It goes without saying that in the axial direction of the screening drum 10 multiple flow nozzles are provided, for example three equally spaced. The same several outlets 46 can also be provided. The Filter system 48 can also be used as a dedusting system Fan run.

Die Platte 30 ist mit Hilfe eines Verstellzylinders 58 verstellbar in Richtung des Doppelpfeils 32 je nach den Betriebsverhältnissen, d.h. Beschaffenheit des zu siebenden Gutes und dem Druck in der Leitung 36. In letzterer kann ein Druckgeber (nicht gezeigt) vorgesehen werden, der mit einer ebenfalls nicht gezeigten Steuervorrichtung verbunden ist, welche den Verstellzylinder 58 betätigt in Abhängigkeit vom gemessenen Druck. Analog kann eine Verstellung des kreisförmig gebogenen Ablenkbleches 42 vorgenommen werden.The plate 30 is by means of an adjusting cylinder 58 adjustable in the direction of the double arrow 32 depending on the Operating conditions, i.e. Condition of the sieved Good and the pressure on line 36. In the latter a pressure transmitter (not shown) can be provided which connected to a control device, also not shown which actuates the adjusting cylinder 58 in dependence from the measured pressure. An adjustment can be made analogously of the circularly bent baffle 42 made become.

Claims (10)

  1. A plant for separating by screening a fraction of small grain size from material crushed by way of a crusher or likewise, with a sieve drum which is preferably arranged with a gradient and which is rotatably mounted and driven in a housing, and with a lower outlet housing for the sieved fraction, characterised in that at the lower upwardly moving region of the sieve drum (10) on the outer side there is arranged at least one flow nozzle (34) which is connected to a pressurised gas source and which directs a gas flow into the sieve drum (10) obliquely upwards against the oppositely lying drum region, and in the inside of the sieve drum (10) there is arranged a deflecting plate (42) which in the circumferential region extends the flow nozzle (34) and the apex of the sieve drum (10).
  2. A plant according to claim 1, characterised in that as a pressurised gas source the exhaust of a diesel motor of a current unit for the energy supply of the crusher and of the sieve drum is provided.
  3. A plant according to claim 1 or 2, characterised in that the flow nozzle (34) is adjustable via an adjusting device (58) for changing the height of the entry region of the flow (40) into the sieve drum (10).
  4. A plant according to claim 1 or 2, characterised in that the flow nozzle (34) is formed as an opening in a plate (30) which is coupled to the adjusting device (58).
  5. A plant according to claim 3 or 4, characterised in that a control device is provided for the adjusting device (58), a pressure emitter in front of the flow nozzle (34) measures the pressure of the gas and the adjusting device (58) adjusts the flow nozzle in dependence on the measured pressure.
  6. A plant according to one of the claims 1 to 5, characterised in that at the front end face of the sieve drum (10) there is arranged an air exit (22) in front of which a filter (24) is arranged.
  7. A plant according to one of the claims 1 to 6, characterised in that in the upper region of the housing (12) there is arranged at least one connection (46) for gas to which there is allocated a filter device (48), a dedusting plant with its own blower or likewise for entrained material, and the connection (46) is connected to the supply conduit (36) for the flow nozzle (34) via a return conduit (50).
  8. A plant according to claim 7, characterised in that in the return conduit (50) there is arranged a heating device (52).
  9. A plant according to claim 7 or 8, characterised in that the material separated in the filter device (48) is led to a conveying device (56) which guides the material to the outlet (26) of the sieve drum housing (12) or to a removal belt (28) below the housing (12) for the material being sieved.
  10. A plant according to one of the claims 1 to 9, characterised in that the walling of the housing (12) comprises a heat insulation.
EP96105762A 1996-04-12 1996-04-12 Plant for separating by screening a fraction of small grain size from crushed material Expired - Lifetime EP0801995B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE59602162T DE59602162D1 (en) 1996-04-12 1996-04-12 Plant for screening a fraction of small grain sizes from a comminuted material
DK96105762T DK0801995T3 (en) 1996-04-12 1996-04-12 Plant for separating a small grain size fraction from sieve material by sieving
ES96105762T ES2135131T3 (en) 1996-04-12 1996-04-12 DEVICE FOR SCREENING A FRACTION OF SMALL GRAIN SIZES OF A GROUND PRODUCT.
AT96105762T ATE180995T1 (en) 1996-04-12 1996-04-12 SYSTEM FOR SCREENING A FRACTION OF SMALL GRAIN SIZES FROM A CRUSHED MATERIAL
EP96105762A EP0801995B1 (en) 1996-04-12 1996-04-12 Plant for separating by screening a fraction of small grain size from crushed material
GR990401564T GR3030489T3 (en) 1996-04-12 1999-06-10 Plant for separating by screening a fraction of small grain size from crushed material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96105762A EP0801995B1 (en) 1996-04-12 1996-04-12 Plant for separating by screening a fraction of small grain size from crushed material

Publications (2)

Publication Number Publication Date
EP0801995A1 EP0801995A1 (en) 1997-10-22
EP0801995B1 true EP0801995B1 (en) 1999-06-09

Family

ID=8222663

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Application Number Title Priority Date Filing Date
EP96105762A Expired - Lifetime EP0801995B1 (en) 1996-04-12 1996-04-12 Plant for separating by screening a fraction of small grain size from crushed material

Country Status (6)

Country Link
EP (1) EP0801995B1 (en)
AT (1) ATE180995T1 (en)
DE (1) DE59602162D1 (en)
DK (1) DK0801995T3 (en)
ES (1) ES2135131T3 (en)
GR (1) GR3030489T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101347756B (en) * 2008-04-18 2010-04-21 王庆辉 Hammer leaf type drum sieve pulverizing machine
CN101947481A (en) * 2010-10-22 2011-01-19 河南理工大学 Selective crusher for underground use

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004048006A1 (en) * 2002-11-28 2004-06-10 Mbengineering Gmbh & Co. Kg Method and device for separating dust particles from a granulate
AT523806B1 (en) * 2020-05-13 2022-09-15 Rubble Master Hmh Gmbh Process for cleaning off crushed grain in crushers
CN114011530B (en) * 2021-10-14 2023-05-30 南京澳博工业智能科技研究院有限公司 Efficient treatment equipment for cement grinding and processing and application method thereof
CN115121326A (en) * 2022-08-26 2022-09-30 徐州科恒奥制冷设备有限公司 Innocent treatment equipment for disassembling waste electromechanical products
CN115283255B (en) * 2022-09-27 2023-01-31 山东润科化工股份有限公司 Fire-retardant master batch screening plant
CN116371726B (en) * 2023-06-07 2023-08-11 山西东强生物科技有限公司 Fine screening equipment for chemical materials

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU906627A1 (en) * 1980-06-16 1982-02-23 Всесоюзный Научно-Исследовательский,Экспериментально-Конструкторский Институт Коммунального Машиностроения Drum tyre screen
SU1158250A1 (en) * 1983-08-16 1985-05-30 Le Selskokhoz I Pneumatic screen separator
DE3720490A1 (en) * 1987-06-20 1988-12-29 Kapuschinski Hannes J Screen device
DE3905945A1 (en) * 1989-02-25 1990-08-30 Lothar Dipl Ing Schiller SCREENING MACHINE WITH A CYLINDRICAL SCREEN DRUM ROTATING A SINGLE HORIZONTAL AXIS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101347756B (en) * 2008-04-18 2010-04-21 王庆辉 Hammer leaf type drum sieve pulverizing machine
CN101947481A (en) * 2010-10-22 2011-01-19 河南理工大学 Selective crusher for underground use

Also Published As

Publication number Publication date
ES2135131T3 (en) 1999-10-16
ATE180995T1 (en) 1999-06-15
DE59602162D1 (en) 1999-07-15
EP0801995A1 (en) 1997-10-22
GR3030489T3 (en) 1999-10-29
DK0801995T3 (en) 1999-12-13

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