EP0348659A2 - Broyeur à galets à âme tournante - Google Patents

Broyeur à galets à âme tournante Download PDF

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Publication number
EP0348659A2
EP0348659A2 EP89108953A EP89108953A EP0348659A2 EP 0348659 A2 EP0348659 A2 EP 0348659A2 EP 89108953 A EP89108953 A EP 89108953A EP 89108953 A EP89108953 A EP 89108953A EP 0348659 A2 EP0348659 A2 EP 0348659A2
Authority
EP
European Patent Office
Prior art keywords
grinding
grinding bowl
bowl
nozzle ring
segments
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.)
Granted
Application number
EP89108953A
Other languages
German (de)
English (en)
Other versions
EP0348659A3 (en
EP0348659B1 (fr
Inventor
Dieter Kiefer
Helmut Grommes
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.)
Deutsche Babcock Werke Energie und Umwelttechnik AG
Original Assignee
Deutsche Babcock Werke AG
Deutsche Babcock Werke Energie und Umwelttechnik 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6357753&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0348659(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Deutsche Babcock Werke AG, Deutsche Babcock Werke Energie und Umwelttechnik AG filed Critical Deutsche Babcock Werke AG
Publication of EP0348659A2 publication Critical patent/EP0348659A2/fr
Publication of EP0348659A3 publication Critical patent/EP0348659A3/de
Application granted granted Critical
Publication of EP0348659B1 publication Critical patent/EP0348659B1/fr
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
    • 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 invention relates to a roller mill with the features of the preamble of the claim.
  • the grinding bowl segments are cast from a wear-resistant material and are held interchangeably in a support shell as wear parts.
  • the nozzle ring serving to supply warm conveying and drying air is held stationary in the mill housing. Since the nozzle ring is also subject to increased wear, the nozzle ring is separated in a horizontal plane, the upper part being designed as interchangeable segments. The closed lower part and the segments of the upper part of the nozzle ring are castings.
  • the inaccuracies that are unavoidable during casting mean that the blade contour of the nozzle ring can have a dislocation jump in the division plane.
  • the nozzle ring rotates with the grinding bowl in that the blades of the nozzle ring are arranged on the outer circumference of the grinding bowl carrying the grinding bowl segments.
  • the outlet cross section of the nozzle ring is limited by two wear-resistant rings, one of which is exchangeably attached to the grinding bowl and the other to the mill housing. If there is wear on the blades of the nozzle ring in this roller mill, the entire grinding bowl must be removed, and the blades themselves can only be repaired by armored coating.
  • the invention is based, to reduce the number of replaceable wear parts and to increase the dimensional accuracy of the blades of the nozzle ring in a generic roller mill.
  • the vertical roller mill has a housing 1 through which a down pipe 2 is guided for the supply of raw coal.
  • a rotating, horizontal grinding bowl 3 is arranged within the housing 1 and is driven by a motor (not shown) via a gear 4.
  • the grinding bowl 3 contains a support bowl 5 which is connected to a grinding bowl carrier 6 seated on the gear 4. Grinding bowl segments 7 are held on the supporting bowl 5.
  • the grinding bowl segments 7 form a grinding track on which stationary grinding rollers 8 roll.
  • the grinding rollers 8 are supported on a frame 9 which is resiliently braced via rods 10 against the foundation 11 of the roller mill. The grinding rollers 8 are pressed resiliently against the grinding bowl 3 via this clamping device.
  • an air box 12 is formed below the grinding bowl 3, which is provided with an air supply nozzle 13.
  • the air box 12 is closed at the bottom by a bottom and connected to the grinding chamber 14 formed within the housing 1 by a nozzle ring 15.
  • a classifier 16 is arranged on the housing 1, into which a dust discharge line 17 projects. Hot air is introduced into the air box 12 as drying and conveying gas through the air supply connection 13. The air flows through the nozzle ring 15 into the grinding chamber 14, takes the coal dust generated by the grinding rollers 8 on the grinding bowl 3 with it and discharges it via the classifier 16 through the dust outlet line 17.
  • the nozzle ring 15 and the grinding bowl 3 can be seen in detail in FIGS. 2 to 4. Then the side walls of the grinding bowl segments 7 enclose an angle of 30 degrees, so that twelve such grinding bowl segments 7 form the grinding track.
  • the grinding bowl segments 7 are detachably connected to the support bowl 5 of the grinding bowl 3 by means of clamping screws 18 and blocks 19.
  • Shovels 20, which form the nozzle ring 15, are formed on the outer circumference of each grinding bowl segment 7.
  • the grinding bowl segments 7 and the blades 20 form a piece which is made by casting from a wear-resistant material.
  • the blades 20 are curved in the direction of rotation of the grinding bowl 3 and have an angle of 90 degrees on the inflow side and an angle of 30 degrees to the horizontal on the outflow side.
  • the blades 20 are preferably aligned radially to the center of the grinding bowl 3.
  • a blade 20 covers the inflow cross section between two adjacent blades 20. Rectangular exit surfaces are formed on the outflow side between two adjacent blades 20 and the outer circumference of the grinding bowl segment 7.
  • the nozzle ring 15, which rotates together with the grinding bowl 3 due to the design described, is limited to the wall of the housing 1 by inclined plates 21.
  • the sheets 21 jump on the Upper edge in front and follow the incline of the outer edge of the blades 20. This results in channels which run obliquely upwards and are directed into the interior of the housing 1.
  • the sheets 21 and the angle profiles 22 show a triangular outer contour in cross section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP89108953A 1988-07-01 1989-05-18 Broyeur à galets à âme tournante Expired - Lifetime EP0348659B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3822290A DE3822290A1 (de) 1988-07-01 1988-07-01 Walzenschuesselmuehle
DE3822290 1988-07-01

Publications (3)

Publication Number Publication Date
EP0348659A2 true EP0348659A2 (fr) 1990-01-03
EP0348659A3 EP0348659A3 (en) 1990-03-21
EP0348659B1 EP0348659B1 (fr) 1991-12-27

Family

ID=6357753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108953A Expired - Lifetime EP0348659B1 (fr) 1988-07-01 1989-05-18 Broyeur à galets à âme tournante

Country Status (7)

Country Link
US (1) US4953793A (fr)
EP (1) EP0348659B1 (fr)
JP (1) JP2764612B2 (fr)
CN (1) CN1013927B (fr)
DE (2) DE3822290A1 (fr)
RU (1) RU1837972C (fr)
ZA (1) ZA894081B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0409498A3 (en) * 1989-07-20 1991-04-17 Foster Wheeler Energy Corporation Pulverizer having rotatable grinding table with replaceable air port segments
EP3025784A1 (fr) * 2014-11-27 2016-06-01 Loesche GmbH Table de broyage

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5019196A (en) * 1989-11-20 1991-05-28 Cmi International, Inc. Sand muller bowl liner
DE4412197A1 (de) * 1994-04-08 1995-10-19 Loesche Gmbh Verfahren und Einrichtung zum Zerkleinern von Material unterschiedlicher Körnung, insbesondere Luftstrommühle
JP5412801B2 (ja) * 2008-11-17 2014-02-12 株式会社Ｉｈｉ バイオマスミル
JP5791556B2 (ja) * 2012-03-26 2015-10-07 三菱日立パワーシステムズ株式会社 竪型粉砕装置
CN103521308B (zh) * 2013-11-05 2016-03-09 长沙深湘通用机器有限公司 辊式磨机
CA2932143A1 (fr) * 2013-12-12 2015-06-18 Coal Milling Projects (Pty) Limited Broyeur de pulverisation
JP6374742B2 (ja) * 2014-09-22 2018-08-15 川崎重工業株式会社 竪型ローラミル
CN112403659A (zh) * 2020-11-23 2021-02-26 西安建筑科技大学 一种中速磨煤机喷嘴环动叶防磨罩

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE531564C (de) * 1928-04-03 1931-08-12 Alfred Oskar Schulze Federrollenmuehle mit die umlaufende Mahlbahn durchbrechenden Kanaelen und unterhalbder Mahlbahn an die Kanaele angeschlossenen Leitschaufeln
DE717920C (de) * 1940-06-08 1942-02-26 Ernst Curt Loesche Lager fuer Federrollenmuehlenwalzen
DE1152297B (de) * 1956-07-24 1963-08-01 Loesche Kg Luftstrommuehle
DE1055926B (de) * 1957-10-24 1959-04-23 Loesche Hartzerkleinerungs U Z Federrollenmuehle
US3138337A (en) * 1963-03-26 1964-06-23 Combustion Eng Pulverizing bowl mill utlizing a segmented bull ring
FR2384545A1 (fr) * 1977-03-25 1978-10-20 Moritz Jean Broyeur a galets multiples
FR2411634A1 (fr) * 1977-12-13 1979-07-13 Fives Cail Babcock Perfectionnements aux broyeurs verticaux a meules ou a billes
US4687145A (en) * 1985-12-12 1987-08-18 The Babcock & Wilcox Company Roll-and-race pulverizer with rotating throat
JPS62144548U (fr) * 1986-03-04 1987-09-11
JPS62151948U (fr) * 1986-03-19 1987-09-26
FR2605247B1 (fr) * 1986-10-15 1988-12-02 Stein Industrie Dispositif de canalisation du flux d'air vertical sur la peripherie d'une cuve rotative de broyeur a galets d'axe vertical
US4752037A (en) * 1987-04-01 1988-06-21 Combustion Engineering, Inc. Vane wheel assembly for rb mills

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0409498A3 (en) * 1989-07-20 1991-04-17 Foster Wheeler Energy Corporation Pulverizer having rotatable grinding table with replaceable air port segments
EP3025784A1 (fr) * 2014-11-27 2016-06-01 Loesche GmbH Table de broyage
WO2016083045A1 (fr) * 2014-11-27 2016-06-02 Loesche Gmbh Cuve de broyage
CN106999941A (zh) * 2014-11-27 2017-08-01 德国莱歇公司 研磨盘
CN106999941B (zh) * 2014-11-27 2019-04-26 德国莱歇公司 研磨盘

Also Published As

Publication number Publication date
JP2764612B2 (ja) 1998-06-11
EP0348659A3 (en) 1990-03-21
ZA894081B (en) 1990-06-27
US4953793A (en) 1990-09-04
JPH0240243A (ja) 1990-02-09
DE58900620D1 (de) 1992-02-06
CN1013927B (zh) 1991-09-18
CN1039543A (zh) 1990-02-14
DE3822290A1 (de) 1990-01-04
EP0348659B1 (fr) 1991-12-27
RU1837972C (ru) 1993-08-30

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