EP0227008B1 - Verfahren und Einrichtung zum Betrieb einer Mahlanlage - Google Patents

Verfahren und Einrichtung zum Betrieb einer Mahlanlage Download PDF

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Publication number
EP0227008B1
EP0227008B1 EP86117493A EP86117493A EP0227008B1 EP 0227008 B1 EP0227008 B1 EP 0227008B1 EP 86117493 A EP86117493 A EP 86117493A EP 86117493 A EP86117493 A EP 86117493A EP 0227008 B1 EP0227008 B1 EP 0227008B1
Authority
EP
European Patent Office
Prior art keywords
inert gas
crushing plant
gas
main circuit
circuit
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
EP86117493A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0227008A3 (en
EP0227008A2 (de
Inventor
Günter Jäckering
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.)
Altenburger Maschinen Jaeckering GmbH
Original Assignee
Altenburger Maschinen Jaeckering GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Altenburger Maschinen Jaeckering GmbH filed Critical Altenburger Maschinen Jaeckering GmbH
Priority to AT86117493T priority Critical patent/ATE65192T1/de
Publication of EP0227008A2 publication Critical patent/EP0227008A2/de
Publication of EP0227008A3 publication Critical patent/EP0227008A3/de
Application granted granted Critical
Publication of EP0227008B1 publication Critical patent/EP0227008B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/34—Passing gas through crushing or disintegrating zone gas being recirculated to crushing or disintegrating zone

Definitions

  • the invention relates to a method for operating a grinding system in which the product and a carrier gas flow through the grinding system, in which the carrier gas is an inert gas and in the carrier gas after flowing through the grinding system and after its separation from the ground product in a main circuit is returned to the grinding plant.
  • the invention also relates to a device for carrying out this method.
  • Mills working with carrier gases are widely known.
  • the carrier gas is swirled in grinding chambers in such a way that the product breaks apart mainly due to mutual collisions.
  • Such comminution is much gentler than the comminution brought about by the grinding material coming into contact with stationary or rotating machine parts.
  • an inert gas for example, as the carrier gas Use nitrogen (N2).
  • N2 the carrier gas Use nitrogen
  • the inert gas is fed to the mill instead of air.
  • the ground material is separated from the inert carrier gas, which is blown off into the atmosphere.
  • This mode of operation is associated with a high consumption of inert gas, and in particular if the comminution takes place predominantly in carrier gas vortices, the mills of this type have a high carrier gas requirement.
  • a mill of the type mentioned in the opening paragraph is known from GB-A-1485448.
  • inert gas is introduced into the product feed line in liquid form. This happens depending on the pressure. There is no possibility of a product-specific influence on the pressure prevailing in the inert gas circuit.
  • the object of the present invention is to enable both inert gas monitoring (compensation of inert gas losses, oxygen content) and influence on the pressure prevailing in the inert gas circuit in a method for operating a grinding plant of the type mentioned at the outset.
  • this object is achieved by the characterizing measures of claim 1. Because a partial flow of the inert gas is passed through a branch line in which the compressor and the adjustable throttle are located, not only can inert gas losses in the main circuit be compensated, but also optimal inert gas pressures can be set for the respective regrind.
  • the carrier gas generally absorbs the heat generated during the grinding process, it is advantageous to bring the inert gas to a temperature desired for the respective grinding process before it is returned to the mill inside a cooler. If the inert gas has absorbed moisture during the grinding process, it is advisable remove the moisture before the gas re-enters the mill. This can be carried out in a separate dryer, but expediently in the cooler by simultaneously condensing the moisture.
  • the grinding system shown comprises the mill 1, which via the feed funnel 2 the ground material and at 3 the inert gas, e.g. Nitrogen.
  • the regrind-inert gas mixture leaves the mill 1 through the outlet 4 and flows through the line 5 to the cyclone separator 6.
  • This separator 6 is followed by a further separator 7, which is designed as a filter cyclone.
  • the regrind obtained in the separator 6 is transported by means of a screw 8 into a funnel 9, into which the regrind also passes from the filter cyclone 7.
  • a cellular wheel sluice 11 serves to empty the funnel 9.
  • the fan 14 is connected via line 13, which the inert gas via Feeds line 15 back to mill 1 and maintains the circulation flow.
  • a cooler 16 is arranged in line 15, in which the inert gases are cooled to the desired mill inlet temperature.
  • the cooler 16 can be designed such that it serves to dry the inert gases by condensation. Another possibility is to provide a separate dryer (not shown) in line 15.
  • a branch line is provided parallel to line 15 and includes line sections 17 and 18.
  • a dust filter 19, a compressor 21 and a storage tank 22 are arranged one after the other in the line section 17, into which a portion of the circulated inert gas passes.
  • the compressed inert gas in the storage tank 22 can additionally serve to shake off the filter cyclone 7.
  • line 25 with valve 26 is connected to line section 18, which leads to compressed air distributor 27 above filter cyclone 7.
  • the filter bags located in the cyclone 7 are cleaned by pressure pulses. The inert gas used for this is also not lost since it is recycled.
  • valve 31 is a control valve which is connected to an O2 measuring point 32 (32 ⁇ ) via the electrical line 33 (33 '). As soon as the measuring point registers oxygen values that exceed a maximum value (e.g. 8%), the valve 31 is opened and inert gas is metered in until a minimum value (e.g. 6%) is reached. The overpressure that may occur in the system is reduced via overpressure valves, not shown in detail.
  • the oxygen measuring point should ideally be arranged directly in the main circuit. There, however, it is endangered by the dust content of the gas. It is therefore advisable to arrange them in a bypass to line 15, behind a dust filter. In the grinding system shown, it is in line section 17 behind dust filter 19 arranged, which simultaneously protects the compressor 21 from dust. Of course, other locations for the arrangement of the O2 measuring point in the grinding system are also conceivable. For example, it can be connected to line section 18 (see dashed line of measuring cell 32zelle).

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Shovels (AREA)
  • Adjustment And Processing Of Grains (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP86117493A 1985-12-23 1986-12-16 Verfahren und Einrichtung zum Betrieb einer Mahlanlage Expired - Lifetime EP0227008B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86117493T ATE65192T1 (de) 1985-12-23 1986-12-16 Verfahren und einrichtung zum betrieb einer mahlanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853545828 DE3545828A1 (de) 1985-12-23 1985-12-23 Verfahren und einrichtung zum betrieb einer mahlanlage
DE3545828 1985-12-23

Publications (3)

Publication Number Publication Date
EP0227008A2 EP0227008A2 (de) 1987-07-01
EP0227008A3 EP0227008A3 (en) 1988-04-20
EP0227008B1 true EP0227008B1 (de) 1991-07-17

Family

ID=6289406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86117493A Expired - Lifetime EP0227008B1 (de) 1985-12-23 1986-12-16 Verfahren und Einrichtung zum Betrieb einer Mahlanlage

Country Status (4)

Country Link
EP (1) EP0227008B1 (es)
AT (1) ATE65192T1 (es)
DE (2) DE3545828A1 (es)
ES (1) ES2023808B3 (es)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3734359A1 (de) * 1987-10-10 1989-04-20 Rheinische Braunkohlenw Ag Verfahren zur erzeugung von braunkohlenstaub
CH677455A5 (es) * 1988-01-14 1991-05-31 Johann Georg Dr Schnitzer
DE4035730C2 (de) * 1990-11-09 1993-10-14 Loesche Gmbh Verfahren und Vorrichtung zur Behandlung von feuchten Gas-Staub-Gemischen
DE4300784C2 (de) * 1993-01-14 2003-07-17 Mewa Recycling Maschinen Und A Verfahren und Vorrichtung zur Zerkleinerung von zu entsorgenden Geräten, die Hartschaum- oder Hartkunststoffe aufweisen
EP0835881B2 (de) † 1996-10-14 2004-12-29 Wolff Walsrode Ag Verfahren zur Herstellung von Methylcellulose-Pulvern mit spezieller Sieblinie
DE10152991A1 (de) * 2001-10-26 2003-05-08 Wolff Walsrode Ag Verfahren und Vorrichtung zur Mahltrocknung
DE102009044219A1 (de) * 2009-10-09 2011-06-09 Ventilatorenfabrik Oelde Gmbh Verfahren und Einrichtung zum Zerkleinern von Feststoffen
DE102011112741B4 (de) * 2011-09-07 2015-09-03 Werner Hofmann Inertgasgedeckte geschlossene Mahl-und Siebanlage
CN105944816B (zh) * 2016-06-21 2018-04-20 江苏密友粉体新装备制造有限公司 一种安全防爆型气流粉碎系统
CN114423526B (zh) * 2019-10-02 2023-04-04 古河机械金属株式会社 制造无机材料的装置以及制造无机材料的方法
CN116078510A (zh) * 2022-11-23 2023-05-09 苏州金远胜智能装备股份有限公司 一种防爆气流粉碎系统及控制方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE136547C (es) *
US3602164A (en) * 1970-04-08 1971-08-31 Harold Reintjes Material reducing system having oxygen deficient atmosphere
GB1485448A (en) * 1974-11-11 1977-09-14 Boc International Ltd Comminuting combustible material

Also Published As

Publication number Publication date
ES2023808B3 (es) 1992-02-16
EP0227008A3 (en) 1988-04-20
ATE65192T1 (de) 1991-08-15
DE3545828A1 (de) 1987-07-02
DE3680306D1 (de) 1991-08-22
EP0227008A2 (de) 1987-07-01

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