EP0150501A2 - Procédé et dispositif utilisant un broyeur à charbon pulvérisé pour la production d'un mélange monogène de charbon pulvérisé et de chaux pulvérisée ou de dolomie pulvérisée - Google Patents

Procédé et dispositif utilisant un broyeur à charbon pulvérisé pour la production d'un mélange monogène de charbon pulvérisé et de chaux pulvérisée ou de dolomie pulvérisée Download PDF

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Publication number
EP0150501A2
EP0150501A2 EP84116355A EP84116355A EP0150501A2 EP 0150501 A2 EP0150501 A2 EP 0150501A2 EP 84116355 A EP84116355 A EP 84116355A EP 84116355 A EP84116355 A EP 84116355A EP 0150501 A2 EP0150501 A2 EP 0150501A2
Authority
EP
European Patent Office
Prior art keywords
limestone
dust
coal
mill
raw coal
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Withdrawn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
EP84116355A
Other languages
German (de)
English (en)
Other versions
EP0150501A3 (fr
Inventor
Horst Brundiek
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
Application filed by Loesche GmbH filed Critical Loesche GmbH
Publication of EP0150501A2 publication Critical patent/EP0150501A2/fr
Publication of EP0150501A3 publication Critical patent/EP0150501A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/10—Treating solid fuels to improve their combustion by using additives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2201/00—Pretreatment of solid fuel
    • F23K2201/10—Pulverizing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2201/00—Pretreatment of solid fuel
    • F23K2201/50—Blending
    • F23K2201/505—Blending with additives

Definitions

  • the invention relates to a device and a method using an airflow mill, in particular in a vertical design (roller mill) with an integrated classifier.
  • a proposal is known to add lime dust to the coal dust, i.e. Mix coal dust and lime dust to bind the sulfur contained in the coal during combustion.
  • One problem with this method is the homogenization of the two types of dust. Because the coal dust / lime dust mixture that is fed to a coal dust burner is not ideally homogeneous, the chemical bonding of the sulfur during the combustion process cannot be optimal. These disadvantages are to be eliminated by the invention.
  • the invention consists in the fact that using an air-flow mill, preferably of a vertical design (roller mill), the lime or dolomite is metered in an uncrushed state in the feed area of the mill.
  • the feed rate from the limestone depends on the raw coal rate; a limestone rate proportional to the raw coal rate is metered in according to the sulfur content of the raw coal.
  • the feed mixture thus produced is fed into the mill via suitable transport devices with air exclusion and is homogeneously ground there.
  • the resulting dust mixture abbreviated to "white coal” is discharged from the mill by air or gas flow.
  • the "white flour coal dust" gets directly into the coal dust burner, for example a steam boiler, with the primary air flow of the mill.
  • the "white flour coal dust” is separated from the carrier gas stream via cyclones and / or filters and collected in a dust silo.
  • the dust silo is emptied and further transported to a coal dust burner in a known manner.
  • Simultaneous grinding therefore has the sense of optimizing the combustion of coal dust with a view to lower environmental pollution, as well as reducing the expenditure on process engineering plant components.
  • the latter means that no further grinding plant is required for the production of lime or dolomite, i.e. considerable investment costs can be saved.
  • the drawing shows an airflow mill of a vertical design, a roller mill with an integrated classifier.
  • the raw coal is drawn off from the raw coal bunker 1 according to arrow 2 through a raw coal feeder.
  • a trough chain conveyor is shown as an example, which can be separated from the raw coal bunker via a gate valve 4.
  • the discharge conveyor is driven by a speed-adjustable gear 5 and a motor 6.
  • Limestone or dolomite stone is discharged from a storage bunker 7 via a discharge element 8.
  • the deductible has a variable-speed drive 9 with motor 10.
  • the discharged limestone falls into the shaft 16 and together with the raw coal in the common shaft 11. From here, both raw materials go into a closed transport device, shown as a screw 12, with constant drive 13.
  • Raw coal and Limestone is introduced into the airflow mill 15 via the conveyor 12 according to arrow 14 with the exclusion of air.
  • the entire transport and extraction system for raw coal and limestone is shown as an example in the drawing. It is crucial that the take-off conveyors 3 and 8 have variable-speed drives, so that the material flow drawn off can be metered.
  • the special feature is that the two variable drives 5 and 9 for raw coal and limestone or dolomite stone are linked to one another via a proportional controller 29.
  • the triangle with the letter n indicated in the controller symbol means that the speed of the drive 9 to the limestone metering device 8 is dependent on the speed of the drive 5 to the raw coal metering device 3.
  • the speed of the raw coal feeder 3 determines the feed rate of raw coal to the mill. Depending on this raw coal feed rate, a predetermined percentage of limestone is added to the metering device 8 via the variable drive 9. If the flow of raw coal fluctuates, the controller 29 ensures that the same percentage of limestone is always added to the raw coal.
  • the raw material drawn off with the same ratio in the feed area is simultaneously milled in the mill 15 by the grinding elements 27 on the grinding bowl 17.
  • the grinding bowl 17 has a drive 18 which drives the bowl 17 at a constant speed.
  • the ground material is crushed between the grinding media (rollers) 27 and the bowl 17.
  • the raw material consisting of coal and limestone is mixed during grinding and centrifugally thrown off the bowl 17.
  • An air or gas flow generated by a blower enters the mill housing at the inlet connection according to arrow 19. It is accelerated to a high speed in an annular gap or blade ring 21 surrounding the bowl 17 and carries the crushed regrind thrown off by centrifugal force upwards into the classifier 22.
  • the classifier shown has a rotor 23 which is driven by the shaft 24 and with Last 25 is provided. The grind fineness can be adjusted according to the speed of the rotor 23.
  • Grist that is not crushed to the fineness of the product falls back on the grinding bowl 17 for further (re) crushing.
  • Grist that has been crushed to its fineness passes the classifier and emerges together with the carrier air according to arrow 26.
  • the homogenized dust / air mixture can be fed to a coal dust burner directly or via intermediate storage.
  • the mill 15 with sifter 22 shown in the drawing serves only as an example. Any other type of airflow mill with an integrated classifier is also suitable for homogeneously grinding, classifying and discharging a feed material consisting of two components.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Accessories For Mixers (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP84116355A 1983-12-31 1984-12-27 Procédé et dispositif utilisant un broyeur à charbon pulvérisé pour la production d'un mélange monogène de charbon pulvérisé et de chaux pulvérisée ou de dolomie pulvérisée Withdrawn EP0150501A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833347703 DE3347703A1 (de) 1983-12-31 1983-12-31 Vorrichtung und verfahren unter verwendung einer luftstrommuehle zur herstellung einer homogenen mischung aus kohlenstaub und kalkstaub oder dolomitstaub
DE3347703 1983-12-31

Publications (2)

Publication Number Publication Date
EP0150501A2 true EP0150501A2 (fr) 1985-08-07
EP0150501A3 EP0150501A3 (fr) 1986-10-01

Family

ID=6218544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116355A Withdrawn EP0150501A3 (fr) 1983-12-31 1984-12-27 Procédé et dispositif utilisant un broyeur à charbon pulvérisé pour la production d'un mélange monogène de charbon pulvérisé et de chaux pulvérisée ou de dolomie pulvérisée

Country Status (4)

Country Link
EP (1) EP0150501A3 (fr)
JP (1) JPS60228598A (fr)
DE (1) DE3347703A1 (fr)
DK (1) DK622384A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990003837A1 (fr) * 1988-10-14 1990-04-19 Oy Finnpulva Ab Procede pour lier les composants de soufre formes dans une chaudiere a charbon pulverise
EP0385499A2 (fr) * 1989-03-03 1990-09-05 Mitsubishi Jukogyo Kabushiki Kaisha Procédé de combustion de charbon pulvérisé
EP0608691A1 (fr) * 1993-01-29 1994-08-03 DKM DEUTSCHE KOHLE MARKETING GmbH Procédé pour la production d'énergie à partir de combustibles solides et brûleur mixte pour différents combustibles
CN106247364A (zh) * 2016-08-29 2016-12-21 大唐清苑热电有限公司 一种在线石灰石给粉系统

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4421313C2 (de) * 1994-06-17 1996-08-14 Lausitzer Braunkohle Ag Additiv zur Reduzierung der Schadstoffbelastung der Luft bei der Verbrennung von Braunkohle
DE19512311A1 (de) * 1995-04-01 1996-10-02 Buehler Ag Kontinuierliche Feststofförderung zwischen Behältern unterschiedlichen Druckes
JP5456226B2 (ja) * 2005-07-14 2014-03-26 出光興産株式会社 有害微量元素溶出抑制方法
JP2008031363A (ja) * 2006-07-31 2008-02-14 Central Res Inst Of Electric Power Ind 低ホウ素ガス石炭燃焼方法及び低溶出燃焼灰の製造方法
JP2008169338A (ja) * 2007-01-12 2008-07-24 Chugoku Electric Power Co Inc:The 石炭未燃分低減方法
JP5569767B2 (ja) * 2008-09-22 2014-08-13 宇部興産機械株式会社 竪型粉砕機の運転方法
JP6744401B2 (ja) * 2017-11-30 2020-08-19 中国電力株式会社 微粉炭供給装置及び有害微量元素溶出抑制方法
CN113814055A (zh) * 2021-09-17 2021-12-21 重庆从心科技有限公司 一种石灰石粉制备工艺

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823676A (en) * 1972-10-10 1974-07-16 Warren Cook Chem Inc Method of reducing sulphur dioxide emissions from coal
DE2741510A1 (de) * 1977-09-15 1979-03-22 Bbc Brown Boveri & Cie Verfahren und regelanordnung zur durchsatzregelung einer sichterumlaufmahlanlage
DE2807076A1 (de) * 1978-02-18 1979-08-23 Rhein Westfael Elect Werk Ag Verwendung von kalziumoxid als mittel zur reduzierung der schwefelemission bei kesselfeuerung
US4184640A (en) * 1978-05-05 1980-01-22 Williams Robert M Coal grinding apparatus for direct fired burners
DE3205321A1 (de) * 1982-02-15 1983-08-18 Deutsche Babcock Anlagen Ag, 4200 Oberhausen Vorrichtung zum einbringen von kohle in einen unter erhoehtem druck stehenden verbrennungsraum

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3015710A1 (de) * 1980-04-24 1981-10-29 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren zum abbinden von in brennstoffen befindlichem schwefel
JPS607936B2 (ja) * 1982-02-12 1985-02-28 社団法人日本精米工業会 粉粒体の連続混合装置
JPS58146246A (ja) * 1982-02-25 1983-08-31 Satake Eng Co Ltd 混米装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823676A (en) * 1972-10-10 1974-07-16 Warren Cook Chem Inc Method of reducing sulphur dioxide emissions from coal
DE2741510A1 (de) * 1977-09-15 1979-03-22 Bbc Brown Boveri & Cie Verfahren und regelanordnung zur durchsatzregelung einer sichterumlaufmahlanlage
DE2807076A1 (de) * 1978-02-18 1979-08-23 Rhein Westfael Elect Werk Ag Verwendung von kalziumoxid als mittel zur reduzierung der schwefelemission bei kesselfeuerung
US4184640A (en) * 1978-05-05 1980-01-22 Williams Robert M Coal grinding apparatus for direct fired burners
DE3205321A1 (de) * 1982-02-15 1983-08-18 Deutsche Babcock Anlagen Ag, 4200 Oberhausen Vorrichtung zum einbringen von kohle in einen unter erhoehtem druck stehenden verbrennungsraum

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990003837A1 (fr) * 1988-10-14 1990-04-19 Oy Finnpulva Ab Procede pour lier les composants de soufre formes dans une chaudiere a charbon pulverise
EP0385499A2 (fr) * 1989-03-03 1990-09-05 Mitsubishi Jukogyo Kabushiki Kaisha Procédé de combustion de charbon pulvérisé
EP0385499A3 (fr) * 1989-03-03 1991-05-22 Mitsubishi Jukogyo Kabushiki Kaisha Procédé de combustion de charbon pulvérisé
EP0608691A1 (fr) * 1993-01-29 1994-08-03 DKM DEUTSCHE KOHLE MARKETING GmbH Procédé pour la production d'énergie à partir de combustibles solides et brûleur mixte pour différents combustibles
CN106247364A (zh) * 2016-08-29 2016-12-21 大唐清苑热电有限公司 一种在线石灰石给粉系统

Also Published As

Publication number Publication date
JPH0232013B2 (fr) 1990-07-18
DK622384D0 (da) 1984-12-21
DE3347703A1 (de) 1985-07-11
EP0150501A3 (fr) 1986-10-01
JPS60228598A (ja) 1985-11-13
DK622384A (da) 1985-07-01

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Inventor name: BRUNDIEK, HORST