EP1156892B1 - Kegelsichter und verfahren zum sichten von eingeschränkt oder nicht rieselfähigem schüttgut - Google Patents

Kegelsichter und verfahren zum sichten von eingeschränkt oder nicht rieselfähigem schüttgut Download PDF

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Publication number
EP1156892B1
EP1156892B1 EP00993231A EP00993231A EP1156892B1 EP 1156892 B1 EP1156892 B1 EP 1156892B1 EP 00993231 A EP00993231 A EP 00993231A EP 00993231 A EP00993231 A EP 00993231A EP 1156892 B1 EP1156892 B1 EP 1156892B1
Authority
EP
European Patent Office
Prior art keywords
cone
feed tube
bulk material
air inlet
feed
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
EP00993231A
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German (de)
English (en)
French (fr)
Other versions
EP1156892A1 (de
Inventor
Klaus Straetmans
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.)
Bueckmann GmbH
Original Assignee
Bueckmann GmbH
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Filing date
Publication date
Application filed by Bueckmann GmbH filed Critical Bueckmann GmbH
Publication of EP1156892A1 publication Critical patent/EP1156892A1/de
Application granted granted Critical
Publication of EP1156892B1 publication Critical patent/EP1156892B1/de
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
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall

Definitions

  • the invention relates to cone classifiers for classifying restricted or not free-flowing bulk material, the one Has a light goods fraction and a heavy goods fraction, and procedures for carrying out the sighting.
  • DE 297 09 918 U describes a cone classifier with a Housing, with one from above in the upper housing section protruding filler pipe for entering the bulk material, with one below the outlet opening of the filler pipe arranged double cone, with one with the lower Housing section connected to the main air inlet and with a air outlet connected to the upper housing section, being between the filler pipe and the double cone on the one hand and on the other hand, a flow channel is formed in the housing is.
  • the main visual zone being constructed that the ascending light goods and the falling ones Do not interfere with heavy goods.
  • the light goods are reliably separated and via the classifier head on the upper section of the housing, arranged air outlet removed from the cone sifter.
  • the Heavy goods on the other hand, become one at the bottom Housing section, the classifier base, arranged outlet discharged.
  • main viewing area there is a viewing area for that Heavy goods are provided in the area of the main air intake. Also here there is a cross-flow sighting, whereby Light goods that are not from the heavy cargo in the main sighting has been separated, is separated and in the direction of Main viewing area and beyond towards the Air outlet is transported. Due to the Current conditions will be in the aftermath zone of the Heavy goods separated light goods against the surface of the transported lower cone of the double cone.
  • the invention is therefore based on the technical problem the cone classifier known from the prior art and to design the associated screening process in such a way and educate that constipation within the Bulk material flow can be largely avoided.
  • a cone sifter according to claim 1 solved in that at least one filling air inlet with the Filler tube for admitting a downward facing Air flow within at least part of the Filler tube is connected.
  • the top down flowing air conveys the bulk material in the direction of the Double cone, because in addition to the weight of the particles of the Bulk the downward airflow as additional force component in the direction of gravity acts.
  • the at least one is preferably Filling air inlet at the upper end of the filling pipe arranged and via a distributor ring and an between a filler neck and the filler pipe Annular gap connected to the filler pipe. So it will Bulk goods along the entire drop distance through the Filler tube with the air flow directed downwards. Blockages along the entire pipe are thus in the Approach prevented.
  • a plurality of in arranged the wall of the filler pipe and one after air flow directed below within the filler pipe inlet air intakes are provided, the are designed in particular as nozzles. This can, for example. in addition to one over the entire length of the filler pipe running air flow an additional air flow just be let in in the area where preferred Constipation occurs. A targeted prevention of constipation is thus achieved.
  • connection line the filling air inlet with the air supply to the main air intake. This will do without additional effort on air flow generators, a secondary air flow through the Filling tube inserted.
  • the line for the Filling air inlet preferably with the high pressure side of the Recirculation system connected to the fan.
  • the connecting line preferably has Throttle valve to control the amount of air through the fill tube to be able to adjust through.
  • the air flows in an open system generated, the air outlet not with the Main air inlet is connected.
  • the fill air intake with an additional compressed air generator be connected to a high air flow in the filler pipe Generating strength.
  • This embodiment can be especially when using nozzles as filling air inlet deploy.
  • the distributor cone is applied to the main air flow is added, it is advantageous to the cross section of the Flow channel between the filler pipe and the upper one Housing section at least in sections larger than that Cross section of the flow channel between the double cone and the middle housing section.
  • the larger amount of air flowing through and the larger Cross-section can be approximately the same Flow velocities in succession passed through sections of the flow channel become. Changes in the flow cross-sections can can be used specifically to Air speeds in the different visual zones adjust.
  • the distance of the outlet opening is preferred of the filler tube to the tip of the double cone adjustable.
  • the size of the exit gap between the two changed and the amount of bulk material brought in be adjusted. If constipation begins frequently, each of the downward air flow can be resolved within the filler tube, so the Gap between the outlet opening of the filler pipe and the distributor cone can be enlarged to provide more space for the To get passage of the bulk material.
  • the problem of the asymmetrical introduction of the bulk material can be remedied by at least one guide element in the filler pipe with which the bulk material is relative to the tip of the Double cone is centered. Even if that's at least one Guide element the cross section within the filler pipe constricted, so in the passage opening of the Guiding element occurring due to constipation eliminates the downward airflow.
  • the cone sifter explained above and the sighting procedure affect especially when restricted or non-pourable bulk goods positive.
  • the This can result in free-flowing properties of a bulk material be characterized that the individual particles existing bulk goods essentially without clumping or Caking ensures a permanent free flow. Granules are therefore pourable.
  • the pourability will inter alia restricted if the particles of the Bulk goods have a low weight with a large surface area exhibit. This causes it to come between the particles of the Bulk goods lying flat against each other to get caught and entanglements as well as high friction and Adhesive forces that allow the individual to move independently Particles difficult or impossible against each other.
  • Restricted or non-pourable bulk goods For example, a mixture of paper and cardboard, the Bulk material is crushed before sifting. Such a processed bulk goods from a mixture of shredded paper and cardboard can then be made using the cone classifier according to the invention are sighted, so that paper as light goods from cardboard as heavy goods is separated.
  • Waste paper that is collected in conventional collection containers consists of 70% to 80% paper and approx. 20% to 30% cardboard, with a small proportion of contaminants such as metals, minerals, plastics and the like in the Mixture are included.
  • the properties of the shredded waste paper can be as be characterized as follows.
  • the mix consists of very light and large-area particles and therefore tends to Building bridges and thus to narrow spaces in the Material flow and to attach to surfaces and To form blockages.
  • the measures according to the invention prevent these blockages, so that even with the restricted or not free-flowing bulk goods Visual process for separating paper and cardboard can be applied.
  • restricted or not pourable Bulk goods are a mixture of composted material and foils or the like, crushed Plastic packaging material or a Shredder light fraction.
  • FIG. 1 and 2 is a first embodiment of a shown cone classifier according to the invention, the Fig. 3 to 5 represent corresponding cross sections.
  • the cone sifter points a housing 2 with an upper housing section 2a, a middle housing section 2b and a lower Housing section 2c.
  • a filler pipe 4 protrudes from above the upper housing section 2a and serves Enter the bulk material.
  • a main air inlet 12 with the lower housing section 2c connected while a Air outlet 14 connected to the upper housing section 2a is.
  • the air flowing in through the main air inlet 12 becomes distributed radially to the lower via a distributor ring 13 Housing section 2c supplied, the distributor ring 13th is circular, as in FIGS. 3, 4 and 5 is shown.
  • a filler neck 20 is provided at the lower end of the cellular wheel sluice.
  • the particles of the light goods are shown as lines and the particles of the heavy goods as circles in order to distinguish them graphically from one another.
  • the bulk material After passing through the filler pipe 4, the bulk material arrives the distributor cone 8 and slips on the cone surface below and radially outwards. At the lower outer edge of the distributor cone 8, i.e. at the contact edge with the lower cone 10, the bulk material slides off and falls into the Flow channel 16.
  • the air flow hits the bulk material, where the particles of the Light goods can be lifted up while the Particles of heavy goods essentially fall down.
  • the spatial area of the flow channel 16 near the the lower end of the distributor cone 8 thus represents the Main visual zone 24. Due to the direction of movement of the Bulk material and the flow direction of the air flow in the Flow channel 16 takes place in the main viewing zone 24 Cross-examination of the bulk material instead.
  • the separated light material increases with that in the flow channel 16, which is between the inlet pipe 4 and the upper Housing section 2a is formed upwards.
  • the flow velocity of the air flow is set in this way is that heavy particles from the separated fraction come out and fall down.
  • indulgence of light goods finds a further improvement in the purity of the Light goods fraction instead.
  • the heavy goods get into the tapered lower housing section 2c and is using a rotary valve 19 for further processing discharged.
  • a filling air inlet 28 with the Filler tube 4 connected, causing a downward Air flow can be let into the filler tube 4 can.
  • the filling inlet 28 is with the upper end of the Filler tube 4 connected.
  • the fill air inlet 28 is over a distributor ring 29 and one between a filler neck 20 and the filler tube 4 formed annular gap 31 with the Filler tube 4 connected.
  • the fed Air flow from the annular gap 31 down into the interior of the Filler tube 4 passed.
  • a connecting line 30 is provided which Filling air inlet 28 with the air supply to the main air inlet 12 connects.
  • a throttle valve 32 in the Connection line 30 is arranged.
  • the flow cross section between the filler pipe 4 and the upper one Housing section 2a formed upper portion of the Flow channel 16 sections larger than that Flow cross section of between the double cone 6 and middle housing section 2b formed lower Section of the flow channel 16.
  • the upper one Housing section 2a two conical Housing sections 34 and 36.
  • Housing sections 34 and 36 result from the expanding flow cross-section a smaller Flow rate of the rising air so that in in this area, the indulgence of the light goods fraction can take place.
  • the above the housing section 34 again reduced flow cross-section then serves the air for deflection into the air outlet 14 accelerate.
  • the filler tube 4 has one at its lower end sliding pipe section 4b, with which the vertical Position of the outlet opening 4a can be adjusted. This allows the distance of the outlet opening 4a of the Filler tube 4 to the tip 6a of the double cone 6 depending on Size of the material flow and size of the air flow be adjusted. This is in Fig. 1 with a Double arrow shown.
  • the filler tube 4 there is also a guide element 38 arranged to the bulk relative to the tip 6a of the Center double cone 6. This is necessary because those for introducing the bulk material into the filler pipe 4 provided rotary valve 18 is not a symmetrical Entry of the bulk material guaranteed. On the contrary the movement of the rotary valve 18 often causes the Bulk material on one side onto the tip 6a of the double cone 6 is applied. The guide element 38 counteracts this because the bulk material at a short distance above the double cone 6 is centered on the tip 6a.
  • the displacement cone 40 mainly serves for this purpose, the entering via the main air inlet 12 and from the guide surface 22 led air flow up into the To introduce flow channel 16. Without the displacement cone were the radially from all sides from the Distributor ring 13 entering air flow shares meet below the double cone 6 and swirl so that there is no even flow along the Flow channel 16 could be reached.
  • the interior 44 of the displacement cone 40 is with a Connected displacer air inlet 46 through which one of the Main air flow branched secondary air flow is supplied.
  • the supplied secondary air flow leaves the interior 44 of the Displacement cone 40 by one between the cylindrical Spigot 42 and the lower cone 10 of the double cone 6 formed annular gap 48 so that there is an upward directed air flow along the surface of the bottom Cone 10 trains.
  • This is in Fig. 1 with small Arrows shown.
  • the double cone 6 is above one Bracket 50 with the cylindrical neck 42 of the Displacement cone 40 connected.
  • the bracket 50 is like this trained that with the help of a screw connection Distance between the double cone 6 and the cylindrical Stub 42 can be changed. So that the size of the Annular gap 48 can be changed to adjust the air volume.
  • Displacement cone air inlet 46 as a support strut for the Displacement cone 40 formed, which also the cylindrical neck 42 and the double cone 6 worn become. So it is not necessary in addition to an additional support struts per se Supply line for supplying an air flow provided. As shown in Fig. 5, all are four support struts as displacement cone air inlets 46 educated. However, since the displacer cone air inlet 46 a larger diameter than a normal bracket strut has, it is also possible to use only one or at least not all support struts as positive cone air inlets 46 to train. The aim is to determine the cross section of the Not flow channel 16 in the region of the support struts restrict more than necessary.
  • FIG. 1 and 2 show that at the lower end of the Displacement cone 40, i.e. at the lower tip of the lower one
  • An outlet opening 52 is provided in the cone 40b a regulating body 54 is arranged.
  • the Regulation body 54 is in the interior 44 in the Area of the lower cone 40b arranged holder 56 kept, the distance between the regulatory body 54 and the outlet opening 52 by means of a Screw connection is adjustable. Thus, the amount of air emerging through the outlet opening 52 relative to the amount of air exiting through the annular gap 48 can be set.
  • the regulatory body 54 has continue to have a conical surface around the emerging Deflect airflow laterally.
  • the mobility of the regulating body 54 in the vertical direction is in Fig. 1 shown with a small double arrow.
  • the Bracket strut 46 formed as an air-supplying hollow tube and has a plurality of openings 58 in the wall on. An air stream emerges through these openings, so that Particles that adhere to the surface of the support strut 46 attach from the exiting from the openings 58 Air flow to be detached. This makes it effective prevents deposits from becoming too large on the Bracket struts 46 can form. Because the particles of the Air flow essentially from above on the Bracket struts 46 fall, the openings are 58th preferably on the upper side of the support struts 46 educated.
  • Fig. 6 shows a second embodiment of a conical classifier 100 'according to the invention, which essentially Share with the previously described embodiment matches. Therefore designate the same reference numerals same device elements as they are with reference to FIG. 1 to 5 have been previously described.
  • the difference to the first embodiment is that between the double cone 6 and the displacement cone 40 a further double cone 60 is provided, one has upper cone 60a and a lower cone 60b. On cylindrical nozzle 62 connects the upper cone 60a the lower cone 10. By arranging the additional Double cone 60 become two further viewing zones 64 and 66 provided, reducing the degree of separation of the Light goods fraction is improved by the heavy goods fraction. It is therefore a multi-stage cone classifier.
  • the interior 64 of the Double cone 60 fluidically with the interior 44 of the Displacement cone 40 and the cylindrical connecting piece 42 connected. Furthermore is between the cylindrical neck 62 and the lower cone 10 an annular gap 66 is formed, through which an air flow along the surface of the lower cone 10 is inserted.
  • annular gap 48 which is between the lower cone 60b and the cylindrical connecting piece 42 is formed, a Air flow along the surface of the lower cone 60b educated. It is effective on both lower cones 10 and 60b prevents light goods particles from sticking to the Accumulate surface and can lead to blockages.
  • Double cone 60 vertical relative to displacement cone 40 held adjustable.
  • Another bracket 68 is with the cylindrical connector 62 connected and carries the double cone 6 so that it is vertical relative to the double cone 60 is adjustable.
  • FIG. 7 finally shows the cone sifter according to the invention together with a device for generating a circulating, closed air flow.
  • the recirculation cycle is described starting with a fan 70.
  • the fan 70 draws air in via an intake line 72 and passes this to the outlet with increased pressure Main air inlet 12 of classifier cone 100 via the feed line 74 from.
  • Two throttle valves 80 and 82 are arranged in the feed line 74, on the one hand the total air volume and on the other hand the ratio of Main air flow to the main air inlet 12 and the Secondary air flows through the secondary lines 76 and 78 to be able to adjust. Furthermore, this already serves above called throttle valve 32 in line 30 to this Ratio of air volumes in branch lines 76 and 78 adjust.
  • the separated light material emerges from the air outlet 14 the exhaust air into an exhaust air line 84, which is connected to the input 86 of a cyclone is connected.
  • the exhaust air is tangential embedded so that a. within the cyclone 88 Rotational flow is generated. This is what happens Centrifugal forces that remove the light goods from the air flow throw out.
  • the light goods then move due to the air flow spirally along the container wall down into the sedimentation funnel 92. From there it gets Light goods via a rotary valve 94 to the outside and can processed further.
  • the one separated from the light goods Airflow does not get inside the cyclone 88 Immersion tube shown, which is connected to an outlet 96 , which in turn is connected to the suction line 72 of the fan 70 is connected.
EP00993231A 1999-12-02 2000-11-18 Kegelsichter und verfahren zum sichten von eingeschränkt oder nicht rieselfähigem schüttgut Expired - Lifetime EP1156892B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19957993A DE19957993B4 (de) 1999-12-02 1999-12-02 Kegelsichter und Verfahren zum Sichten von eingeschränkt oder nicht rieselfähigem Schüttgut und Halterungsstrebe
DE19957993 1999-12-02
PCT/EP2000/011496 WO2001039899A1 (de) 1999-12-02 2000-11-18 Kegelsichter und verfahren zum sichten von eingeschränkt oder nicht rieselfähigem schüttgut

Publications (2)

Publication Number Publication Date
EP1156892A1 EP1156892A1 (de) 2001-11-28
EP1156892B1 true EP1156892B1 (de) 2004-03-17

Family

ID=7931108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00993231A Expired - Lifetime EP1156892B1 (de) 1999-12-02 2000-11-18 Kegelsichter und verfahren zum sichten von eingeschränkt oder nicht rieselfähigem schüttgut

Country Status (9)

Country Link
EP (1) EP1156892B1 (ja)
JP (1) JP2003515447A (ja)
AT (1) ATE261783T1 (ja)
AU (1) AU5437401A (ja)
DE (2) DE19957993B4 (ja)
DK (1) DK1156892T3 (ja)
ES (1) ES2221871T3 (ja)
TW (1) TW473402B (ja)
WO (1) WO2001039899A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8167138B2 (en) 2005-01-13 2012-05-01 Panasonic Corporation Dry washing device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10010354C2 (de) * 2000-03-07 2003-02-06 Bueckmann Gmbh Tech Gewebe Und Verfahren und Vorrichtung zur Steuerung des Weißegrades eines Schüttgutes aus zerkleinerten Papierfraktionen
DE10251210A1 (de) 2002-10-31 2004-05-19 Focke Gmbh & Co. Kg Vorrichtung zum Aufbereiten von Tabak bei der Herstellung von Zigaretten
DE10252782B4 (de) * 2002-11-08 2011-02-24 SLF Oberflächentechnik GmbH Anlage zum Rückgewinnen von Strahlpartikeln
DE10352119A1 (de) * 2003-11-04 2005-06-09 Focke & Co.(Gmbh & Co. Kg) Verfahren und Einrichtung zum Sichten von Tabak
US8312994B2 (en) * 2009-03-18 2012-11-20 Pelletron Corporation Cylindrical dedusting apparatus for particulate material

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE560279A (ja) *
US1522151A (en) * 1923-06-15 1925-01-06 Albert H Stebbins Pneumatic classifier
DE933928C (de) * 1952-07-25 1955-10-06 Ruhrchemie Ag Vorrichtung zur Entstaubung und Klassierung von koernigen Stoffen, insbesondere von mineralischen Duengemitteln
DE1194233B (de) * 1956-08-25 1965-06-03 Polysius Gmbh Vorrichtung zum Sichten von Gut unterschied-licher Korngroesse oder Wichte
US3904515A (en) * 1974-05-01 1975-09-09 New Life Foundation High yield refuse separation system
DD203237A1 (de) * 1982-02-08 1983-10-19 Dietmar Kummer Vorrichtung und verfahren zum entstauben von schuettguetern, insbesondere granulaten aus synthetischen hochpolymeren
DD234807A1 (de) * 1985-03-04 1986-04-16 Schwarza Chemiefaser Vorrichtung zum entstauben von schuettguetern, insbesondere granulat aus synthetischen hochpolymeren
DE59309296D1 (de) * 1992-10-20 1999-02-25 Waeschle Maschf Gmbh Vorrichtung und Verfahren zum Reinigen eines im wesentlichen in Granulatform vorliegenden Korngemenges
DE29709918U1 (de) * 1997-06-07 1998-10-08 Bueckmann Gmbh Vorrichtung zum Ausscheiden von Fein- und Leichtgut aus trockenem, rieselfähigem Schüttgut

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8167138B2 (en) 2005-01-13 2012-05-01 Panasonic Corporation Dry washing device

Also Published As

Publication number Publication date
ATE261783T1 (de) 2004-04-15
DE50005686D1 (de) 2004-04-22
EP1156892A1 (de) 2001-11-28
TW473402B (en) 2002-01-21
WO2001039899A1 (de) 2001-06-07
JP2003515447A (ja) 2003-05-07
DK1156892T3 (da) 2004-07-19
DE19957993B4 (de) 2004-07-22
DE19957993A1 (de) 2001-06-13
AU5437401A (en) 2001-06-12
ES2221871T3 (es) 2005-01-16

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