EP0264103A2 - Vorrichtung zur Kanalisierung eines vertikalen Luftstromes am Umfang der rotierenden Mahlschüssel einer vertikalen Walzenmühle - Google Patents

Vorrichtung zur Kanalisierung eines vertikalen Luftstromes am Umfang der rotierenden Mahlschüssel einer vertikalen Walzenmühle Download PDF

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Publication number
EP0264103A2
EP0264103A2 EP87114937A EP87114937A EP0264103A2 EP 0264103 A2 EP0264103 A2 EP 0264103A2 EP 87114937 A EP87114937 A EP 87114937A EP 87114937 A EP87114937 A EP 87114937A EP 0264103 A2 EP0264103 A2 EP 0264103A2
Authority
EP
European Patent Office
Prior art keywords
tank
blade
cheek
vertical
air flow
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Withdrawn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
EP87114937A
Other languages
English (en)
French (fr)
Other versions
EP0264103A3 (de
Inventor
Claude Amieux
Marcel Davids
Jean-Paul Pargon
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.)
Stein Industrie SA
Original Assignee
Stein Industrie SA
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 Stein Industrie SA filed Critical Stein Industrie SA
Publication of EP0264103A2 publication Critical patent/EP0264103A2/de
Publication of EP0264103A3 publication Critical patent/EP0264103A3/de
Withdrawn legal-status Critical Current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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/001—Air flow directing means positioned on the periphery of the horizontally rotating milling surface

Definitions

  • the present invention relates to a device for channeling the vertical air flow over the periphery of a substantially planar rotary mill of a roller mill, with a vertical axis, formed of blades inclined relative to a vertical vertical plane.
  • the material to be ground is poured over the tank, and the rollers roll on the layer of crushing material.
  • the grains of crushed material escape under the effect of centrifugal force beyond the periphery of the tank, and are carried upwards by an upward flow of air discharged between the periphery of the tank and the external envelope. of the crusher.
  • the air flow channeling device is intended to bring up the grinder, above the tank, the grains of crushed material, in order to allow the separation between finely crushed grains, sent for use, and grains insufficiently ground, falling on the tank.
  • the present invention aims to provide a device for channeling the air flow on the periphery of such a tank which consists of simple manufacturing elements, inexpensive and easy to fix by bolting on the periphery of the tank.
  • each of its blades is provided, on an edge opposite to the tank, with a lateral cheek concentric with the peripheral of the tank extending to the vicinity of the lower end of the next blade in the direction of rotation of the tank, and having an upper rim connecting to the upper edge of the blade.
  • each blade increases from its lower end to its upper end.
  • Each blading is further provided, on its edge adjoining the tank, a cheek extending to the vicinity of the lower end of the next blading in the direction of rotation of the tank.
  • the cheek of the edge of the vane adjoining the tank has a higher rim higher than that of the flap of the vane.
  • the cheek of the edge of the vane adjoining the tank is pierced with holes for fixing the vane on the periphery of the tank using bolts.
  • the holes for fixing the blading on the periphery of the tank are at least three in number, and the face of the cheek has around these holes an extra thickness such that the heads of the bolts screwed into the wall are erased by relative to the surface of the allowance.
  • the rotary tank 1 of the mill is provided with a rim 2 above which the grains ground by rollers (not shown) are poured under the effect of the centrifugal force.
  • On the side 3 of the tank are fixed by bolts, such as 9 and 10, blades 4 for channeling the air flow arriving in the direction indicated by the arrows.
  • the cheek 14 of the vane 4 has around the bores of passage of the bolts of the extra thicknesses 17A, 16A such that the heads of the bolts are obliterated relative to the extra thicknesses when the bolts are screwed into the wall of the tank.
  • a vertical sheet 6 surmounted by a convergent-divergent annular rim 7-8, bending the air flow towards the axis of the mill, in known manner.
  • FIG. 3 represents a sector at 90 ° from the periphery of the tank. On its side 3, beyond the rim 2, are fixed molded metal blades 4A, 4B, 4C, etc. .... nested one inside the other.
  • Figures 4 to 6 show on a larger scale one of the blades.
  • This comprises an inclined flap 11 with a flat lower face 12 and a flat upper face 13.
  • the thickness of the blading flap gradually increases from the bottom up, the lower face 12 making for example an angle of 43 ° 30 ⁇ with the horizontal and the upper face an angle of 43 ° 30 ⁇ with the vertical.
  • the resistance to wear is thus reinforced, this tending to refer to the top of the shutter.
  • the blading ends at its upper part with a flat edge 19.
  • the flange 14 of the blade adjoining the side of the tank is pierced with holes 15, 16, 17 for accommodating fixing bolts on the side of the tank, around which the flange has thickeners 15A, 16A, 17A. Its upper edge 20 is higher than the flat edge 19 of the flap 11.
  • the cheek 18 of the blading opposite the tank and coaxial with the cheek 14, ends with a rim at the same level as that of the flap 11.
  • the blades are preferably castings of molded metal such as Ni-Hard, resistant to abrasion. Their cost is significantly lower than that of machined parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP87114937A 1986-10-15 1987-10-13 Vorrichtung zur Kanalisierung eines vertikalen Luftstromes am Umfang der rotierenden Mahlschüssel einer vertikalen Walzenmühle Withdrawn EP0264103A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8614331A FR2605247B1 (fr) 1986-10-15 1986-10-15 Dispositif de canalisation du flux d'air vertical sur la peripherie d'une cuve rotative de broyeur a galets d'axe vertical
FR8614331 1986-10-15

Publications (2)

Publication Number Publication Date
EP0264103A2 true EP0264103A2 (de) 1988-04-20
EP0264103A3 EP0264103A3 (de) 1989-05-10

Family

ID=9339877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87114937A Withdrawn EP0264103A3 (de) 1986-10-15 1987-10-13 Vorrichtung zur Kanalisierung eines vertikalen Luftstromes am Umfang der rotierenden Mahlschüssel einer vertikalen Walzenmühle

Country Status (2)

Country Link
EP (1) EP0264103A3 (de)
FR (1) FR2605247B1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0348659A3 (en) * 1988-07-01 1990-03-21 Deutsche Babcock Werke Aktiengesellschaft Roller bowl mill
US5263855A (en) * 1992-05-14 1993-11-23 The Babcock & Wilcox Company Low pressure drop rotating vertical vane inlet passage for coal pulverizer
US5263655A (en) * 1992-03-26 1993-11-23 The Babcock & Wilcox Company Coal pulverizer
DE4340195A1 (de) * 1992-11-25 1994-06-09 Babcock & Wilcox Co Geschweißtes rotierendes Ringkanalsegment für Kohlenstaubmühlen mit austauschbaren Leitschaufeln und einstellbarer Kanalöffnungsfläche
WO2000051740A1 (en) * 1999-03-01 2000-09-08 Alstom Power Inc. An arrangement for securing a vane wheel assembly to a grinding table of a pulverizer bowl mill
CN103406191A (zh) * 2013-07-19 2013-11-27 国家电网公司 一种hp型中速磨煤机及降低其石子煤排放量的方法
CN109382172A (zh) * 2018-11-30 2019-02-26 厦门金邦达实业有限责任公司 一种一体式导向装置以及碗式中速磨煤机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1152297B (de) * 1956-07-24 1963-08-01 Loesche Kg Luftstrommuehle
US3511445A (en) * 1968-04-05 1970-05-12 Ronald A Ashdown Air flow control means for pulverizing mill
US4523721A (en) * 1982-12-08 1985-06-18 Combustion Engineering, Inc. Bowl mill with primary classifier assembly
DE3423412A1 (de) * 1984-06-25 1986-01-02 Claudius Peters Ag, 2000 Hamburg Vertikalmuehle, insbesondere waelzmuehle fuer kohlenvermahlung

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0348659A3 (en) * 1988-07-01 1990-03-21 Deutsche Babcock Werke Aktiengesellschaft Roller bowl mill
US5263655A (en) * 1992-03-26 1993-11-23 The Babcock & Wilcox Company Coal pulverizer
US5263855A (en) * 1992-05-14 1993-11-23 The Babcock & Wilcox Company Low pressure drop rotating vertical vane inlet passage for coal pulverizer
DE4340195A1 (de) * 1992-11-25 1994-06-09 Babcock & Wilcox Co Geschweißtes rotierendes Ringkanalsegment für Kohlenstaubmühlen mit austauschbaren Leitschaufeln und einstellbarer Kanalöffnungsfläche
US5340041A (en) * 1992-11-25 1994-08-23 The Babcock & Wilcox Company Welded rotating annular passage segment for coal pulverizers with replaceable vanes and adjustable passage port area
DE4317906A1 (de) * 1993-03-11 1994-12-01 Babcock & Wilcox Co Verbesserter Einlaßkanal für eine Kohle-Pulverisierungsmühle mit rotierenden Vertikalschaufeln mit niedrigem Druckverlust
WO2000051740A1 (en) * 1999-03-01 2000-09-08 Alstom Power Inc. An arrangement for securing a vane wheel assembly to a grinding table of a pulverizer bowl mill
CN103406191A (zh) * 2013-07-19 2013-11-27 国家电网公司 一种hp型中速磨煤机及降低其石子煤排放量的方法
CN109382172A (zh) * 2018-11-30 2019-02-26 厦门金邦达实业有限责任公司 一种一体式导向装置以及碗式中速磨煤机

Also Published As

Publication number Publication date
FR2605247B1 (fr) 1988-12-02
EP0264103A3 (de) 1989-05-10
FR2605247A1 (fr) 1988-04-22

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