EP0891404A1 - Procede pour le broyage et le sechage du lignite - Google Patents

Procede pour le broyage et le sechage du lignite

Info

Publication number
EP0891404A1
EP0891404A1 EP97916398A EP97916398A EP0891404A1 EP 0891404 A1 EP0891404 A1 EP 0891404A1 EP 97916398 A EP97916398 A EP 97916398A EP 97916398 A EP97916398 A EP 97916398A EP 0891404 A1 EP0891404 A1 EP 0891404A1
Authority
EP
European Patent Office
Prior art keywords
fluidized bed
vapors
comminution
bed drying
drying
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
EP97916398A
Other languages
German (de)
English (en)
Other versions
EP0891404B1 (fr
Inventor
Malte Knizia
Stefan Laux
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.)
BBP Energy GmbH
Original Assignee
L&C Steinmueller GmbH
BBP Energy 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 L&C Steinmueller GmbH, BBP Energy GmbH filed Critical L&C Steinmueller GmbH
Publication of EP0891404A1 publication Critical patent/EP0891404A1/fr
Application granted granted Critical
Publication of EP0891404B1 publication Critical patent/EP0891404B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • C10F5/00—Drying or de-watering peat
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
    • F26B1/005—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids by means of disintegrating, e.g. crushing, shredding, milling the materials to be dried

Definitions

  • the invention relates to a method for comminuting and drying lignite, in which the lignite is subjected to at least two comminution steps and is dried in an indirectly heated fluidized bed dryer, at least one first comminution step taking place before the fluidized bed drying and vapors being withdrawn from the fluidized bed drying.
  • the dedusted vapors are compressed and used for the indirect heating of the fluidized bed dryer.
  • the fluidized bed dryer is heated with steam and the vapors are condensed and the heat extracted is used for other purposes.
  • the fluidized bed dryer works with an atmosphere of slightly superheated steam, the vapors can be used to screen the ground material without any safety problems.
  • the fines separated by the screening can be fed to the fluidized bed drying or the dust separator, using the vapors themselves.
  • Subclaims 2 - 10 are directed to preferred procedures.
  • Fig. 2 shows a procedure in which the crushing in a
  • Shredding device with recycling of coarse material is carried out before the fluidized bed drying
  • Fig. 3 shows a method in which the fluidized bed drying is preceded by a first comminution device and a second comminution device with a downstream vapor classifier is followed by the fluidized bed drying and
  • FIG. 4 shows a process control, comparable to the process control according to FIG. 3, but with the omission of a separate classifier, the fluidized bed drying system itself is used as a classifier.
  • raw lignite RK is fed to a first comminution device 2.
  • the comminuted coal 3 is introduced into a separator 5 by means of a feeder into a vapor stream B fed via line 4.
  • the coarse material of the classifier 5 is introduced into a second comminution device 7 via an allocator 6.
  • the comminution material of the comminution device 7 is fed to a fluidized bed dryer 9 via a line 8 'with the aid of a vapor stream brought in via line 8.
  • the fluidized bed dryer 9 is indirectly heated via at least one heating surface 10 which, for. B. in the WTA process with compressed vapors.
  • the fluidized bed dryer 9 is acted upon by a schematically illustrated nozzle 11 with a fluidizing agent.
  • Dried brown coal GK is drawn off from the fluidized bed dryer, as is shown schematically by the extraction device 12.
  • the vapors drawn off from the fluidized bed dryer 9 via line 13 are dedusted in a vapor electrostatic filter 14.
  • the dust coal SK is drawn off via a discharge device 15.
  • the line 4 with the branch line 8 is connected to the outlet of the vapor electrostatic precipitator and a vapor blower 16 is arranged in the line.
  • a vapor withdrawal line 17 is also connected to the output of the electrostatic filter 14. As in the WTA process, this can be led to a vapor compressor (not shown) or, as in the DWT process, to a vapor condenser (not shown) or can be released into the atmosphere.
  • shredding devices that are suitable for shredding wet coal are suitable as shredding devices.
  • shredding devices include, in particular, hammer mills, in which the crushing takes place by impact on impact edges.
  • hammer mills in which the crushing takes place by impact on impact edges.
  • impact wheel mills e.g. B. impact wheel mills and impact splitter.
  • the raw lignite RK is fed via a feeder 18 to a comminution device 19.
  • the comminution device is designed such that it can suck in vapors not dedusted from dust via a line 20 which is connected directly to the fluidized bed dryer 9.
  • the coal comminuted in the comminution device 19 becomes a classifying separator via a line 21 '
  • the coarse material of the separating separator 21 is via line
  • a self-priming beater wheel mill can be used here as the comminution device, in which the comminution and conveyance of the transport gas take place in one step. If necessary, it is possible to additionally overheat the vapors sucked in via line 19 with steam brought in from a turbine (not shown), as is shown schematically by FIG. The operation of this arrangement is similar to the operation of a Schiagrad mill on a raw lignite furnace.
  • the raw lignite RK comminuted in the first comminution device 2 is fed directly to the fluidized bed dryer 9 via the apportioning device.
  • the dried lignite GK drawn off via the extraction device 12 is fed to a comminution device 25 with a separator 25 'connected downstream via a line 25 ", the function of which is comparable to that of the separator according to FIG. 2.
  • the comminution device 25 is shown in FIG. 3 Shown as a non-self-priming comminution device, so that vapors dedusted from dust are fed to it via a line 26 with the fan switched on.
  • the fine material of the separating separator 25 ' is fed via a line 29 not to the fluidized bed dryer 9 but to the vapor electrostatic precipitator 14, which therefore not only removes dust from the vapors emerging from the fluidized bed dryer, but also from the vapors.
  • a hammer mill here.
  • the shredding device 25 is not followed by a sifter, but via a line 32 directly into the ground material discharged from the shredding device 25 by means of the vapor stream B fed via line 26 the fluidized bed dryer is blown in, preferably above the fluidized bed which arises in the fluidized bed dryer, the top side O of which is shown schematically in FIG. 4.
  • the coarse material sinks into the fluidized bed and is conveyed again to the extraction device 12.
  • a baffle plate 33 is arranged in the free space above the fluidized bed, onto which the gas / solid mixture stream emerging from line 32 impinges.
  • each teat of the fluidized bed dryer 9 or the vapor electrostatic precipitator 14 can be assigned a withdrawal device.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Beans For Foods Or Fodder (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

L'invention concerne un procédé pour le broyage et le séchage du lignite (RK), dans lequel le lignite est soumis à au moins deux étapes de broyage (2, 7) et est séché dans un sécheur en lit fluidisé (9) à chauffage indirect, au moins une première étape du broyage s'effectuant avant séchage en lit fluidisé, les vapeurs d'échappement étant soutirées en provenance du séchage en lit fluidisé, via un séparateur de poussières (14). En vue d'effectuer le broyage avec une moindre dépense en matériel, le procédé selon l'invention est caractérisé en ce que les vapeurs d'échappement (B) provenant du séchage en lit fluidisé (9) sont utilisées comme vapeurs de tamisage (4) pour une séparation du lignite broyé (3), et en ce que les fines de ce tamisage ne sont soumises à aucun autre broyage.
EP97916398A 1996-03-27 1997-03-26 Procede pour le broyage et le sechage du lignite Expired - Lifetime EP0891404B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19612187A DE19612187C2 (de) 1996-03-27 1996-03-27 Verfahren zur Zerkleinerung und Trocknung von Braunkohle
DE19612187 1996-03-27
PCT/EP1997/001547 WO1997035944A1 (fr) 1996-03-27 1997-03-26 Procede pour le broyage et le sechage du lignite

Publications (2)

Publication Number Publication Date
EP0891404A1 true EP0891404A1 (fr) 1999-01-20
EP0891404B1 EP0891404B1 (fr) 2001-10-24

Family

ID=7789638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97916398A Expired - Lifetime EP0891404B1 (fr) 1996-03-27 1997-03-26 Procede pour le broyage et le sechage du lignite

Country Status (7)

Country Link
EP (1) EP0891404B1 (fr)
AU (1) AU721894B2 (fr)
DE (2) DE19612187C2 (fr)
ES (1) ES2166534T3 (fr)
PL (1) PL329156A1 (fr)
TR (1) TR199801936T2 (fr)
WO (1) WO1997035944A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109374383A (zh) * 2018-12-20 2019-02-22 长沙开元仪器有限公司 自动制样系统及方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946517C2 (de) * 1999-09-28 2001-09-06 Bbp Energy Gmbh Verfahren zur Zerkleinerung und Trocknung von feuchtem Brennstoff
CN102553708B (zh) * 2012-01-19 2013-06-05 中国矿业大学 一种高灰高水易泥化褐煤洗选工艺
DE102012010078A1 (de) * 2012-05-23 2013-11-28 Rwe Power Ag Verfahren zur Aufbereitung von grubenfeuchter Rohbraunkohle

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE830375C (de) * 1949-04-03 1952-02-04 Grosskraftwerk Mannheim A G Kohlenstaubfeuerung mit Mahltrocknung
AT367447B (de) * 1980-04-28 1982-07-12 Voest Alpine Ag Verfahren zur herstellung eines veredelungsproduktes aus braunkohle
US4403996A (en) * 1982-02-10 1983-09-13 Electric Power Development Co. Method of processing low rank coal
DD224648A1 (de) * 1984-06-21 1985-07-10 Inst Energetik Zre Leipzig Verfahren zur rohkohletrocknung und mahlung zu brennstaub
US4725337A (en) * 1984-12-03 1988-02-16 Western Energy Company Method for drying low rank coals
DE3644806C1 (en) * 1986-12-31 1993-05-13 Rheinische Braunkohlenw Ag Process and plant for drying crude lignite in a fluidized-bed dryer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9735944A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109374383A (zh) * 2018-12-20 2019-02-22 长沙开元仪器有限公司 自动制样系统及方法
CN109374383B (zh) * 2018-12-20 2024-02-27 长沙开元仪器有限公司 自动制样系统及方法

Also Published As

Publication number Publication date
DE59705088D1 (de) 2001-11-29
DE19612187C2 (de) 2001-11-15
TR199801936T2 (xx) 1999-01-18
WO1997035944A1 (fr) 1997-10-02
PL329156A1 (en) 1999-03-15
AU2505997A (en) 1997-10-17
DE19612187A1 (de) 1997-10-02
EP0891404B1 (fr) 2001-10-24
AU721894B2 (en) 2000-07-13
ES2166534T3 (es) 2002-04-16

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