EP0042927B1 - Verfahren zur Regelung einer Mahlanlage - Google Patents

Verfahren zur Regelung einer Mahlanlage Download PDF

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Publication number
EP0042927B1
EP0042927B1 EP81103110A EP81103110A EP0042927B1 EP 0042927 B1 EP0042927 B1 EP 0042927B1 EP 81103110 A EP81103110 A EP 81103110A EP 81103110 A EP81103110 A EP 81103110A EP 0042927 B1 EP0042927 B1 EP 0042927B1
Authority
EP
European Patent Office
Prior art keywords
mill
der
kept constant
pressure
storage silo
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
Application number
EP81103110A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0042927A1 (de
Inventor
Ludger Ing. Grad Lohnherr
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0042927A1 publication Critical patent/EP0042927A1/de
Application granted granted Critical
Publication of EP0042927B1 publication Critical patent/EP0042927B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating

Definitions

  • a control method of the type mentioned above is known for example from DE-B-1 260 939.
  • the quantity referred to as the mill differential pressure (which is kept constant by the second control loop) is a measure of the material loading in the grinding chamber of the mill and in the downstream air flow classifier.
  • this second control loop is only effective if at the same time the amount of gas flowing through the mill and thus the gas velocity is kept constant.
  • the invention is therefore based on the object of further developing a control method of the type mentioned at the outset such that, in the event of fluctuations in consumption, the throughput of the mill is changed in such a way that the mill differential pressure and thus the quality of the end product are kept constant.
  • the change in the grinding force of the roller mill is used to keep the filling level of the regrind storage silo constant. If the consumption decreases and the fill level of the regrind (end product) storage silo rises above the setpoint (which is as close as possible to the highest possible fill level), the hydraulically generated grinding force of the roller mill is reduced. This reduces the grinding, which leads to an increase in the internal material cycle and thus to an increase in the mill differential pressure.
  • the setpoint deviation of the mill differential pressure reduces the quantity of the material to be ground that is fed to the mill until the setpoint value of the mill differential pressure is reached again.
  • the reduced fill level of the regrind storage silo causes an increase in the hydraulically generated grinding force of the roller mill. This increases the grinding, which leads to a decrease in the internal material cycle and thus to a reduction in the differential pressure in the mill.
  • the negative setpoint deviation of the mill differential pressure regulates the amount of the material to be ground that is fed to the mill until the setpoint is reached again.
  • the control according to the invention thus ensures a constant internal material cycle between the mill and classifier, regardless of the respective consumption with the filling level of the storage silo kept approximately constant, which has a favorable effect on keeping the fineness of the end product constant.
  • the system contains a roller mill 1 with a hydraulically generated grinding force and pneumatic regrind, furthermore an air flow sifter 2 arranged above the roller mill 1, a dust separator 3, a regrind (end product) storage silo 4, a circulating air fan 5, a device 6 for feeding material as well as a furnace 7 or another hot gas generator. Further elements of the system are explained in the description of the function.
  • the storage silo 4 is based on Druckmeßdo sen 8, which are connected to a controller 9, which acts via an electric motor 10 on a pressure relief valve -11, which is in the hydraulic circuit for generating the grinding force of the roller mill 1.
  • the third control loop by means of which the gas temperature on the gas outlet side (line 19) of the classifier 2 is kept constant, contains a temperature measuring element 23, which acts on the furnace 7 via a controller in the exemplary embodiment shown.
  • the gas temperature can also be kept constant by means of a control flap in a hot gas supply line.
  • the fourth control circuit provided according to the invention serves to keep the fill level of the regrind storage silo 4 constant by changing the hydraulically generated grinding force of the roller mill 1.
  • the signal supplied by the pressure transducers 8 is fed to the controller 9 which, in the event of a deviation from the desired value, transfers the hydraulic pressure of the roller mill 1 the pressure relief valve 11 adjusted by the motor 10 varies.
  • a fifth control circuit which keeps the fineness of the ground material constant by adjusting the classifier 2 (for example, by adjusting the guide vanes of a static classifier or the blades of a turbo-wind classifier).
  • This fifth control circuit contains a controller 24, to which, on the one hand, a corresponding actual value signal 25 is supplied by a device (not shown) that measures the fineness of the end product and, on the other hand, a fineness setpoint signal 26.
  • the output signal 27 of this controller 24 is used to adjust the classifier 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
EP81103110A 1980-06-26 1981-04-24 Verfahren zur Regelung einer Mahlanlage Expired EP0042927B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803024021 DE3024021A1 (de) 1980-06-26 1980-06-26 Verfahren zur regelung einer kohlen-mahlanlage
DE3024021 1980-06-26

Publications (2)

Publication Number Publication Date
EP0042927A1 EP0042927A1 (de) 1982-01-06
EP0042927B1 true EP0042927B1 (de) 1983-10-19

Family

ID=6105570

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103110A Expired EP0042927B1 (de) 1980-06-26 1981-04-24 Verfahren zur Regelung einer Mahlanlage

Country Status (6)

Country Link
US (1) US4402462A (pt)
EP (1) EP0042927B1 (pt)
BR (1) BR8103195A (pt)
DE (2) DE3024021A1 (pt)
ES (1) ES503016A0 (pt)
ZA (1) ZA814325B (pt)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU555392B2 (en) * 1983-02-02 1986-09-25 Kobe Seiko Sho K.K. Pulverizing and drying flammable material
DE3424277A1 (de) * 1984-07-02 1986-01-09 Claudius Peters Ag, 2000 Hamburg Verfahren zum regulieren der ausgangsleistung eines mahlsystems
JPS6150678A (ja) * 1984-08-18 1986-03-12 川崎重工業株式会社 分級器
DE3520069A1 (de) * 1985-06-04 1986-12-04 Krupp Polysius Ag, 4720 Beckum Verfahren und anlage zur zweistufigen zerkleinerung
DE3639206C1 (de) * 1986-11-15 1988-01-28 Babcock Werke Ag Verfahren zum Regeln einer Walzenschuesselmuehle
US5024387A (en) * 1989-07-25 1991-06-18 E. I. Du Pont De Nemours And Company On line control method to determine media fluidization in a media mill
DE19616901C2 (de) * 1996-04-22 2003-03-06 Alstom Power Boiler Gmbh Verfahren zum Betrieb einer Kohlenstaub-Ventilatormühle für einen kohlenstaubgefeuerten Dampfkessel
DE19757431A1 (de) * 1997-12-23 1999-06-24 Kloeckner Humboldt Wedag Verfahren zum Betrieb einer Kreislaufmahlanlage zum Mahlen von sprödem Gut
SE514413C2 (sv) * 1999-06-14 2001-02-19 Svedala Arbra Ab Sätt och anordning för krossning av material i en krossanläggning med flerstegskrossning
US7926751B2 (en) * 2007-10-08 2011-04-19 Ameren Corporation Systems and methods for grinding coal with secondary air bias and bowl pressure control loops and perforation plates
CN101751011B (zh) * 2008-12-02 2011-12-07 上海宝田新型建材有限公司 一种矿渣粉磨生产控制系统
CN102784705A (zh) * 2011-05-18 2012-11-21 天津医药集团众健康达医疗器械有限公司 智能化全自动闭环粉碎系统

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1260939B (de) * 1963-05-27 1968-02-08 Siemens Ag Regeleinrichtung fuer Mahltrocknungsanlagen, insbesondere fuer Kohle
DE1266618B (de) * 1965-05-12 1968-04-18 Rheinische Kalksteinwerke Verfahren zur Regelung fuer das Feinmahlen von Mahlgut unterschiedlicher Mahlbarkeit bei konstanter Aufgabenmenge
DE1258246B (de) * 1965-05-13 1968-01-04 Westfalia Dinnendahl Groeppel Regelanlage zum Konstanthalten des Feinheitsgrades von mehreren parallel-geschalteten Mahlaggregaten
US3568939A (en) * 1968-10-03 1971-03-09 Westvaco Corp Method and apparatus for controlling pulp refiners
BE758200A (fr) * 1969-11-05 1971-04-01 Wedag Westfalia Dinnendahl Procede de reglage d'une installation de broyage de grande capacite
JPS5348232B2 (pt) * 1974-11-15 1978-12-27
US4172515A (en) * 1976-01-30 1979-10-30 Hauni-Werke Korber & Co. K.G. Method and apparatus for supplying tobacco to tobacco cutting machines
SU620273A1 (ru) * 1977-03-09 1978-08-25 Днепропетровский Горный Институт Им. Артема Способ измерени степени загрузки барабанной мельницы самоизмельчени
FR2383705A1 (fr) * 1977-03-16 1978-10-13 Penarroya Miniere Metall Procede et dispositif pour la regulation des broyeurs
FR2424065A1 (fr) * 1978-04-24 1979-11-23 Stein Industrie Perfectionnement aux broyeurs a cuve tournante et a galets pendulaires

Also Published As

Publication number Publication date
BR8103195A (pt) 1982-08-24
ZA814325B (en) 1982-07-28
DE3024021A1 (de) 1982-01-14
ES8203238A1 (es) 1982-04-01
ES503016A0 (es) 1982-04-01
DE3161231D1 (en) 1983-11-24
US4402462A (en) 1983-09-06
EP0042927A1 (de) 1982-01-06

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