EP0579214B2 - Verfahren zur Mahlung von Rohbraunkohle - Google Patents

Verfahren zur Mahlung von Rohbraunkohle Download PDF

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Publication number
EP0579214B2
EP0579214B2 EP93111318A EP93111318A EP0579214B2 EP 0579214 B2 EP0579214 B2 EP 0579214B2 EP 93111318 A EP93111318 A EP 93111318A EP 93111318 A EP93111318 A EP 93111318A EP 0579214 B2 EP0579214 B2 EP 0579214B2
Authority
EP
European Patent Office
Prior art keywords
air
lignite
roller mill
process according
cold air
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
EP93111318A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0579214B1 (de
EP0579214A1 (de
Inventor
Klaus Kasseck
Werner Karpus
Gerhard Salewski
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.)
Loesche GmbH
Original Assignee
Loesche 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
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Application filed by Loesche GmbH filed Critical Loesche GmbH
Publication of EP0579214A1 publication Critical patent/EP0579214A1/de
Application granted granted Critical
Publication of EP0579214B1 publication Critical patent/EP0579214B1/de
Publication of EP0579214B2 publication Critical patent/EP0579214B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10F—DRYING OR WORKING-UP OF PEAT
    • C10F7/00—Working-up peat
    • C10F7/02—Disintegrating peat
    • 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
    • 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
    • B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier

Definitions

  • the invention relates to a method for grinding from raw lignite to fine coal.
  • raw lignite For grinding of usually moist raw lignite So far, raw lignite has been turned into fine coal passed through dryer in which for example indirect steam heating Coal is carried out and in this way the coal the moisture is largely removed.
  • the raw lignite usually leaves this dryer with a temperature of 70 - 85 ° C.
  • the raw lignite is dried at 70 - 85 ° C dried raw lignite to a temperature range cooled down from about 40 ° C. This happens e.g. in air-cooled trough chain conveyors.
  • the raw lignite that has been dried and cooled in this way has so far been comminuted and ground in pure continuous mills with grinding media, which are designed in particular as rods or balls.
  • the raw lignite is mainly comminuted between the grinding media and the grinding chamber wall.
  • the friction between the grinding media with one another and between the grinding media and the wall of the grinding chamber generates heat, which can result in a sharp temperature increase of, for example, 20 ° C. with dried raw lignite.
  • the previously cooled raw lignite therefore again reaches the permissible temperature limit of around 60 ° C.
  • Coal dust production can be done in inert mode or Air operation take place, always starting from raw coal which is the airflow roller mill from a raw coal bunker is abandoned. There is a milling drying of the Raw coal with the help of the hot gas supplied, the in the water contained in the raw coal through intimate contact evaporated spontaneously with the hot gas, so that already in the grinding chamber the desired mill outlet temperature from 70 to 130 ° C arises.
  • the lignite dust can be one Burners are supplied, or after separation from the hot gas temporarily stored in a filter in a dust bunker.
  • the invention is based on the object of developing a method for grinding lignite which, while maintaining the required operational reliability, is particularly favorable in terms of investment and enables efficient and qualitatively particularly good grinding and screening.
  • An essential core idea of the invention is to combine the grinding process with the cooling process below the critical limit temperature of 60 ° C., an airflow roller mill being particularly suitable for this.
  • Such an airflow roller mill for example of the LOE-SCHE type, has a rotating grinding table or a grinding bowl and thereon friction rollers driven by the material to be ground or provided with its own drive.
  • a circumferential blade ring is arranged around the edge of the grinding bowl, through which the air flow is sucked or blown into the grinding chamber at high speed and with a swirl component.
  • the material which is thrown and also comminuted by the grinding bowl is in this case caught in the approximately hollow cylindrical outer annular space by the air flow and guided in a rotating fluidized bed to the classifier arranged above the grinding chamber.
  • the invention now goes the way Cold air or ambient air over which Vacuum or blow in the blade ring into the grinding chamber and by an intimate washing of the e.g. raw lignite particles at a temperature of about 80 ° C, a cooling of these particles during the rotation of the fluidized bed of the dust-air mixture to reach up to the sifter. in this connection can flow rate and throughput the cold air also depending on the task the raw lignite to be ground are regulated that the critical limit temperature of 60 ° C at which the airflow roller mill and the classifier raw lignite particles or is undercut.
  • the preferred airflow mill type for this Process points between the grinding media, ie the grinding bowl and the grinding rollers a minimum distance on so that a direct metallic contact, which leads to high frictional heat is avoided.
  • the Airflow roller mill operated in negative pressure mode is what the cooling processes and the pneumatic Funding within the roller mill more efficiently and are more energy efficient.
  • preferred selected vacuum mode which is also called suction mode
  • suction mode the corresponding Fans behind the airflow roller mill and in particular behind the dust collectors that the sifter are provided downstream. Because of this suction the fans avoid any temperature increase inside the airflow roller mill, which creates the cooling effect in the roller mill is maintained.
  • the predestined field of application of the method is the grinding of raw lignite.
  • Other types of raw coal can also be found in extremely above by means of the method grind economically.
  • FIG. 1 An airflow roller mill 1 is shown in FIG. This roller mill 1 has a driven, rotating Grinding bowl 2 and on this frictionally rolling or separately driven grinding rollers 3.
  • a classifier 4 is integrated above the grinding chamber 5 provided in the housing of the airflow roller mill 1.
  • the usually moist raw lignite is in the The process initially takes place via dryer 11, which e.g. tube dryer can be with indirect steam heating, led and dried in it.
  • the raw lignite reaches a temperature of around 70 - 85 ° C these dryers 11 on a conveyor 12 and then on a weighing belt 13 for the metered task the dried raw lignite.
  • Via a rotary valve 14 and a feed 7 will Raw lignite is introduced into the airflow roller mill 1.
  • the roller mill 1 becomes a cold gas in the lower region 18, especially cold air from the atmosphere, fed, which then via a shovel ring 17 flows into the grinding chamber 5.
  • FIG. 2 is a larger, schematic partial view the grinding chamber 5 of the roller mill 1 is shown.
  • the cold air 18 is in the edge region of the grinding bowl 2, which is rotated via a drive 16 is, via a blade ring 17 with a The upward swirl movement is blown into the grinding chamber 5.
  • an outer, hollow cylindrical annular space 22 takes place here between the cold air 18 and the ground Raw carbon particles 21 an intimate washing.
  • the Formation of a rotating and rising fluidized bed 24 of cold air 18 and ground raw coal particles 21 leads to a cooling of the Raw lignite particles below the critical limit of 60 ° C.
  • the raw lignite 23 is approximately in the middle of the rotating Grinding bowl 2 abandoned and passes through Centrifugal force radially outward where it is under pressure the grinding rollers 3 is crushed and ground.
  • the Carbon particles thrown off in the direction of arrow 25 21 are then in the rotating fluidized bed 24 effectively cooled by contact with the cold air 18. This cooling process can be done by the flow rate the cold air and its temperature become.
  • the classifier 4 also enables that independently of part-load or full-load operation that the classifier 4 Fine material leaving via outlet 9 to a high level Constancy of a desired dust grain band set can be.
  • the cold air 18 used can advantageously at the same time for the pneumatic conveying of the Fine goods to intermediate silos or to consumers to be used.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
EP93111318A 1992-07-14 1993-07-14 Verfahren zur Mahlung von Rohbraunkohle Expired - Lifetime EP0579214B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4223151A DE4223151C2 (de) 1992-07-14 1992-07-14 Verfahren zur Mahlung von Rohbraunkohle
DE4223151 1992-07-14

Publications (3)

Publication Number Publication Date
EP0579214A1 EP0579214A1 (de) 1994-01-19
EP0579214B1 EP0579214B1 (de) 1997-06-11
EP0579214B2 true EP0579214B2 (de) 2004-08-25

Family

ID=6463183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93111318A Expired - Lifetime EP0579214B2 (de) 1992-07-14 1993-07-14 Verfahren zur Mahlung von Rohbraunkohle

Country Status (11)

Country Link
US (1) US5353997A (cs)
EP (1) EP0579214B2 (cs)
CN (1) CN1033218C (cs)
AU (1) AU663790B2 (cs)
CA (1) CA2100490A1 (cs)
CZ (1) CZ283804B6 (cs)
DE (2) DE4223151C2 (cs)
ES (1) ES2102557T5 (cs)
GR (1) GR3024117T3 (cs)
RU (1) RU2109569C1 (cs)
SK (1) SK279856B6 (cs)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
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EP0842702B1 (en) * 1996-11-15 2000-10-18 Joseph E. Dipl.-Ing. Doumet Method and roll mill for drying and grinding moist feed material
DE60225057T2 (de) * 2001-12-19 2009-02-05 Pirelli Tyre S.P.A. Verfahren und vorrichtung zur kontinuierlichen herstellung einer elastomeren zusammensetzung
US7964128B2 (en) * 2001-12-19 2011-06-21 Pirelli Pneumatici S.P.A. Process and apparatus for continuously producing an elastomeric composition
WO2003103859A2 (de) * 2002-05-04 2003-12-18 Christoph Muther Verfahren und vorrichtung zum behandeln von stoffen oder verbundstoffen und gemischen____________________________________________
AUPS236102A0 (en) * 2002-05-16 2002-06-13 Aimbridge Pty Ltd Grinder
ATE464172T1 (de) 2002-07-11 2010-04-15 Pirelli Verfahren und vorrichtung zur kontinuierlichen herstellung einer elastomermischung
DE102005040519B4 (de) * 2005-08-26 2009-12-31 Loesche Gmbh Verfahren und Vorrichtung zur Vermahlung von heißem und feuchtem Rohmaterial
CZ301641B6 (cs) * 2007-12-17 2010-05-12 Vysoká škola bánská - TU OSTRAVA Prstencová propadová klapka
CN101285587B (zh) * 2008-03-28 2010-10-13 中国神华能源股份有限公司 一种低变质程度煤炭干燥脱水的方法
LU91451B1 (en) * 2008-06-02 2009-12-03 Wurth Paul Sa Method for producing pulverized coal
LU91450B1 (en) * 2008-06-02 2009-12-03 Wurth Paul Sa Method for producing pulverized coal
CN101440323B (zh) * 2008-10-31 2012-07-18 大唐国际化工技术研究院有限公司 低阶煤的干燥成型一体化工艺
DE102010036176A1 (de) 2010-09-02 2012-03-08 Loesche Gmbh Verfahren und Anlage zur Kohlenvermahlung im Inertbetrieb oder im nicht inerten Betrieb
BR112013014840A2 (pt) * 2010-12-16 2016-10-04 Loesche Gmbh processo para a trituração de material a ser moido e moinho de cilindros
EP2524729A1 (de) * 2011-05-20 2012-11-21 Claudius Peters Projects GmbH Anlage und Verfahren zur Mahltrocknung und Einlagerung von Braunkohle
GB2494370B (en) 2011-05-24 2015-02-18 Coomtech Ltd System for removing surface moisture from coal
WO2013166179A1 (en) 2012-05-01 2013-11-07 Innovative Combustion Technologies, Inc. Pulverizer mill protection system
US9604226B2 (en) 2012-05-01 2017-03-28 Innovative Combustion Technologies, Inc. Pulverizer mill protection system
DK2985081T3 (en) 2014-08-12 2017-07-10 Loesche Gmbh Process and air flow vertical mill for grinding hot and humid raw material as well as duct-like segment.
RU2611848C1 (ru) * 2015-09-14 2017-03-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Кемеровский технологический институт пищевой промышленности (университет)" Измельчитель
LU92916B1 (en) * 2015-12-17 2017-07-13 Wurth Paul Sa Grinding and drying plant
CN105597877A (zh) * 2016-04-11 2016-05-25 南京富源资源利用有限公司 带喷雾隔音的移动式反击破碎机
CN109269864B (zh) * 2018-12-11 2024-09-13 长沙开元仪器有限公司 一种煤样制粉设备
CN113102088B (zh) * 2021-04-10 2022-08-30 南京工程学院 大型高炉制粉系统全自动自主集控装置及方法
DE202021002483U1 (de) 2021-07-26 2021-08-05 Hartmut Ortlieb Tasche oder Behälter zur Anbringung an oder unter einem Sattel
CN114602605B (zh) * 2022-04-15 2023-09-15 上海沛元农业发展有限公司 一种灵芝加工用粉碎系统
CN116078493B (zh) * 2023-01-09 2024-01-19 山西锦泉环保科技有限公司 一种活性炭加工用细磨设备

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US2909330A (en) * 1954-09-30 1959-10-20 Hardinge Harlowe Pulverizing mill and process of pulverizing material
DE2361060B2 (de) * 1973-12-07 1978-05-11 Loesche Hartzerkleinerungs- Und Zementmaschinen Kg, 4000 Duesseldorf Anlage und Verfahren zur Herstellung von Zement
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Also Published As

Publication number Publication date
SK74093A3 (en) 1994-02-02
GR3024117T3 (en) 1997-10-31
DE59306716D1 (de) 1997-07-17
DE4223151A1 (de) 1994-01-20
AU4193093A (en) 1994-02-03
DE4223151C2 (de) 1994-11-10
RU2109569C1 (ru) 1998-04-27
CZ140093A3 (en) 1994-03-16
ES2102557T3 (es) 1997-08-01
CN1033218C (zh) 1996-11-06
AU663790B2 (en) 1995-10-19
EP0579214B1 (de) 1997-06-11
CZ283804B6 (cs) 1998-06-17
SK279856B6 (sk) 1999-04-13
CN1092700A (zh) 1994-09-28
CA2100490A1 (en) 1994-01-15
EP0579214A1 (de) 1994-01-19
US5353997A (en) 1994-10-11
ES2102557T5 (es) 2005-04-16

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