EP0923996A2 - Procédé de séparation de matières en vrac - Google Patents

Procédé de séparation de matières en vrac Download PDF

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Publication number
EP0923996A2
EP0923996A2 EP98122444A EP98122444A EP0923996A2 EP 0923996 A2 EP0923996 A2 EP 0923996A2 EP 98122444 A EP98122444 A EP 98122444A EP 98122444 A EP98122444 A EP 98122444A EP 0923996 A2 EP0923996 A2 EP 0923996A2
Authority
EP
European Patent Office
Prior art keywords
gas
sound
fraction
bulk material
emitting surface
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Withdrawn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
EP98122444A
Other languages
German (de)
English (en)
Other versions
EP0923996A3 (fr
Inventor
Heinrich Dohmann
Hans-Heinrich Westendarp
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.)
Coperion Waeschle GmbH and Co KG
Original Assignee
Waeschle GmbH
Coperion Waeschle GmbH and Co KG
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 Waeschle GmbH, Coperion Waeschle GmbH and Co KG filed Critical Waeschle GmbH
Publication of EP0923996A2 publication Critical patent/EP0923996A2/fr
Publication of EP0923996A3 publication Critical patent/EP0923996A3/fr
Withdrawn legal-status Critical Current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
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/04—Control arrangements
    • 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 a method for classifying bulk material according to the Preamble of claim 1.
  • Pneumatic classifiers can be a large number of different types, such as counterflow sifters, deflecting views, etc., which act approximately in the form of Zigzag sifters may embrace both principles. So while the counterflow sifter the classifying gas is directed in the opposite direction to the bulk material to be sifted is the direction of flow of the gas in the deflector in general across it.
  • the present invention is now not intended to be in any particular way pneumatic classifier, because in all cases it works around the same problem, namely that the air energy to be supplied is very accurate is to be set. If it is too weak, then too little of the one to be separated becomes Fine fraction separated; if it is too strong, too many particles of the coarse fraction become excreted together with the fine fraction. This is particularly uncomfortable when different bulk material mixtures are repeatedly sighted so that the correct setting is generally only based on empirical Experiences and can only be approximated.
  • the proportion of the coarse fraction can be determined from the separation of the fine fraction in itself at any point, depending on the requirements rather an early point, e.g. immediately after the sifter, or a later one Point, e.g. in or after a downstream separator. Which one Location chosen depends on the required speed of the scheme, whereby If necessary, however, care should also be taken that they are not too fast is.
  • Sound analyzes have already been proposed for a wide variety of purposes, such as for observing the operation of ball mills or die casting machines, so that the type of carrying out such a sound analysis is indicated does not pose any difficulty in these subject areas. Examples include DE-C-1 070 478 or 24 14 819, DE-A-39 40 560 or 33 00 327, or EP-A-0 000 827 or EP-A-0 112 619 .
  • a sound analysis will also include a possible proportion of so-called Schmachtkorn "show, namely coarse fraction that is too small, but which will give off other frequencies.
  • 2 denotes a pneumatic counterflow sifter, as it is, for example has become known from DE-A-43 02 857, but the invention can be as already mentioned, also on cross-flow sifters, deflection sifters, e.g. Prof. Hull describes, etc. apply.
  • the counterflow sifter 2 shown the bulk material is entered through an upper inlet 1 and leaves the classifier 1 on the underside via an outlet 12.
  • the classifying gas generally Air, through a side gas inlet 13 a.
  • This gas is by itself Any source supplied, for example as air from a fan G (expedient with downstream silencer D) sucked through a line C1, where they go through an input filter F1 to an air flow regulator R, d.i. in the generally a proportional valve. From there, the air flows through the already mentioned lateral channel 13, experiences a deflection at 10 and flows at 36 'upwards until it leaves the sifter 2 through an outlet port 7.
  • the details of the special classifier 2 are already mentioned in DE-A-43 02 857, the content of which is disclosed here by reference should.
  • a baffle plate 1 can be arranged within the connecting piece 7, to which the respective bulk fraction entrained by the gas flow in the Flows past.
  • the noise generated by this fraction and whose frequencies are largely determined by the size of the particles.
  • These frequencies are therefore a measure of those carried by the gas flow Schuffgut, which will consist essentially of a fine fraction Coarse fraction, which should actually go down and into the outlet 12.
  • would Too much coarse fraction carried in the flow would be the efficiency of the sifter 2 questioned.
  • the sound of the baffle plate 1 ⁇ is fed to a sound analysis device FQIC + of a type known per se via a line L1 shown in broken lines, which also expediently contains a structure-borne sound microphone.
  • baffle plate such as the baffle plate 1 ⁇
  • the noise frequencies can be kept within a predetermined range, but that the material of the outlet connector 7 itself could also serve as a sound-emitting surface.
  • a plate 1 ⁇ can also be easily arranged so that any coarse material fraction contained must surely hit it.
  • an outlet line C2 is connected to the outlet port 7, and it is entirely possible within the scope of the invention, in this line C2, in addition or as an alternative to the baffle plate 1 ⁇ , a further baffle plate 2 ⁇ or another sound connected to a corresponding microphone provide area. This area 2 ⁇ or the associated microphone will then be connected to the device FQIC + via a line L2.
  • the line C2 then leads to a separator F2, which is symbolized here as a filter, but can optionally also be formed by a cyclone or any other separator, such as a zigzag sifter.
  • a separator F2 which is symbolized here as a filter, but can optionally also be formed by a cyclone or any other separator, such as a zigzag sifter.
  • this separator F2 there are then two further possibilities for attaching sound-emitting surfaces, such as baffle plates, namely at the inlet of the separator F2, at 3 ⁇ , and at the outlet of the separator F2, at 4 ⁇ .
  • These baffles 3 ⁇ and 4 ⁇ are then connected to the device FQIC + via lines L3 and L4, respectively. All of the sound-emitting surfaces 1 ⁇ to 4 ⁇ can also be in operation at the same time or in part, because details of the size and composition of the fraction carried can be determined by multiple measurements of the sound.
  • control unit FQIC + will deliver a sound analysis result which is compared in a comparator part V with a nominal value N which corresponds to a predetermined, permitted proportion of coarse fraction within the fine material fraction entrained by the gas. This comparison results in an actuating signal which is fed to an adjusting device M, for example an electric motor, for the control valve R.
  • an adjusting device M for example an electric motor
  • the amount of gas does not have to be adjusted using the valve R because it is with classifiers on the relative energy of the gas flow in relation to the feed Bulk quantity arrives. It could therefore also have these two parameters regulation takes place, for example by changing the gas velocity or the bulk quantity, but the embodiment shown is preferred.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
EP98122444A 1997-12-17 1998-11-26 Procédé de séparation de matières en vrac Withdrawn EP0923996A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19756099A DE19756099A1 (de) 1997-12-17 1997-12-17 Verfahren zum Sichten von Schüttgut
DE19756099 1997-12-17

Publications (2)

Publication Number Publication Date
EP0923996A2 true EP0923996A2 (fr) 1999-06-23
EP0923996A3 EP0923996A3 (fr) 2001-06-06

Family

ID=7852248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98122444A Withdrawn EP0923996A3 (fr) 1997-12-17 1998-11-26 Procédé de séparation de matières en vrac

Country Status (4)

Country Link
US (1) US6186334B1 (fr)
EP (1) EP0923996A3 (fr)
JP (1) JPH11239762A (fr)
DE (1) DE19756099A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10240617C1 (de) * 2002-09-03 2003-12-11 Bat Cigarettenfab Gmbh Verfahren und Vorrichtung zur Justierung der Ausselektion von Winnowings
DE102015213092A1 (de) * 2015-07-13 2017-01-19 Thyssenkrupp Ag Sichteinrichtung zum Sichten eines Materialstroms und Verfahren zum Betreiben einer Sichteinrichtung
US11066915B1 (en) 2020-06-09 2021-07-20 Bj Energy Solutions, Llc Methods for detection and mitigation of well screen out

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602716A (en) * 1982-02-23 1986-07-29 Licencia Talalmanyokat Ertekesito Vallalat Process for determining the soundness of sowing seeds and their soundness-dependent germinative ability, and apparatus for carrying out the process
US4634522A (en) * 1981-12-10 1987-01-06 Kamas Industri Ab Arrangement in machines for separating materials having different aerodynamic properties
US5152604A (en) * 1989-07-24 1992-10-06 Fuller Company Recirculating debris separating method and apparatus

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1070478B (fr) 1954-04-30 1959-12-03
DE2414819C3 (de) 1974-03-27 1978-12-21 Richard 8051 Eching Herbst Verfahren zum Spritzgießen von warmformbaren Massen in einer durch Schwingungen beaufschlagten Spritzgießform
GB2002246B (en) 1977-08-12 1982-01-13 Mastermix Eng Co Ltd Apparatus for the production of mixtures dispersions and the like
US4222859A (en) * 1979-01-17 1980-09-16 Charles Medlock Particle separator devices
ATE34927T1 (de) 1982-11-23 1988-06-15 Netzsch Mastermix Ltd Vorrichtung zur herstellung von mischungen, dispersionen und dergleichen.
DE3300327C2 (de) 1983-01-07 1985-01-10 Klöckner-Werke AG, 4100 Duisburg Verfahren zur Durchbruchwarnung bei einer Stranggießanlage und Vorrichtung zur Durchführung dieses Verfahrens
US4576286A (en) * 1983-06-27 1986-03-18 Cochlea Corporation Parts sorting systems
DE3940560C2 (de) 1988-12-05 1994-01-20 Peter Dr Ing Lutze Verfahren zur Qualitätsüberprüfung von Druckgußteilen beim Einfüllen des flüssigen Metalls in die Gießform
DE59309296D1 (de) 1992-10-20 1999-02-25 Waeschle Maschf Gmbh Vorrichtung und Verfahren zum Reinigen eines im wesentlichen in Granulatform vorliegenden Korngemenges
JPH06186069A (ja) * 1992-11-19 1994-07-08 Oval Corp 粉体流量計
US5351832A (en) * 1993-03-29 1994-10-04 Stripping Technologies, Inc. Control system for cleaning systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4634522A (en) * 1981-12-10 1987-01-06 Kamas Industri Ab Arrangement in machines for separating materials having different aerodynamic properties
US4602716A (en) * 1982-02-23 1986-07-29 Licencia Talalmanyokat Ertekesito Vallalat Process for determining the soundness of sowing seeds and their soundness-dependent germinative ability, and apparatus for carrying out the process
US5152604A (en) * 1989-07-24 1992-10-06 Fuller Company Recirculating debris separating method and apparatus

Also Published As

Publication number Publication date
JPH11239762A (ja) 1999-09-07
DE19756099A1 (de) 1999-07-01
EP0923996A3 (fr) 2001-06-06
US6186334B1 (en) 2001-02-13

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