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EP0039270B1 - Anlage zur Trocknungs- und/oder Heizungsbehandlung und Zerkleinerung von körnigem Material - Google Patents

Anlage zur Trocknungs- und/oder Heizungsbehandlung und Zerkleinerung von körnigem Material Download PDF

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Publication number
EP0039270B1
EP0039270B1 EP81400594A EP81400594A EP0039270B1 EP 0039270 B1 EP0039270 B1 EP 0039270B1 EP 81400594 A EP81400594 A EP 81400594A EP 81400594 A EP81400594 A EP 81400594A EP 0039270 B1 EP0039270 B1 EP 0039270B1
Authority
EP
European Patent Office
Prior art keywords
section
chamber
installation according
grinding
cross
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
Application number
EP81400594A
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English (en)
French (fr)
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EP0039270A2 (de
EP0039270A3 (en
Inventor
Serge Louis Joseph E. Delessard
Roger Marcel Puff
Jean-Claude Kita
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.)
Charbonnages de France CDF
Original Assignee
Charbonnages de France CDF
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 Charbonnages de France CDF filed Critical Charbonnages de France CDF
Publication of EP0039270A2 publication Critical patent/EP0039270A2/de
Publication of EP0039270A3 publication Critical patent/EP0039270A3/fr
Application granted granted Critical
Publication of EP0039270B1 publication Critical patent/EP0039270B1/de
Expired 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
    • C10B57/10—Drying
    • 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
    • F23K1/04—Heating fuel prior to delivery to combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
    • F26B17/101—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis
    • F26B17/102—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis with material recirculation, classifying or disintegrating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • F26B3/092—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating
    • F26B3/0923—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating by mechanical means, e.g. vibrated plate, stirrer
    • 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

Definitions

  • the invention relates to an installation for the treatment by drying and / or heating and grinding of a granular material.
  • a coal mixture to be treated for this purpose is usually characterized by the following particle size breakdown: 100% ⁇ 20 mm, 90% ⁇ 10 mm, 50 to 65% ⁇ 3.15 mm.
  • the fumes from the combustion chamber for example at 800 ° C allowing the coal grains to dry, when they are the most humid (between 7 and 11%), by yielding part of their sensible heat to evaporate the surface moisture of the grains, which reduces their average temperature.
  • the coal grains remain at a temperature of 100 ° C until the water has evaporated.
  • the coal becomes drier and more sensitive to the degradation of its coking properties, but the temperature of the fumes has already considerably decreased and reaches 300-380 ° C.
  • the preheated coal can be intended to be put into steam in coke ovens: if the particle size of the coal is too coarse, it is necessary to use a larger quantity of steam for the transport of coal in the ovens and overpressures occur therein; on the other hand, if the particle size is too fine, the quantities of carbon entrained in the riser gas recovery are too large and constitute a significant loss of production, as well as those entrained in a decompression line making it possible to eliminate part coal transport steam before it enters the furnaces.
  • the grinder rotated in the fluidized layer makes it possible to achieve the particle size suitable for charging from raw coal of suitable particle size to avoid, during drying, the degradation of fine grains.
  • the grinding is done by percussion of the bars or hammers of the grinder on the coarsest grains, by percussion of the grains between them, by percussion of the grains on the walls.
  • the grinding mobile can occupy a maximum of space in the elutriation zone.
  • the vertical projection of the grinding mobile represents 80% of the section of the elutriation zone.
  • the grains of coal entering the elutriation zone have a high probability of being intercepted by the grinding mobile.
  • the latter moreover, is rotated at a peripheral speed sufficient to communicate to the particles the energy necessary for the bursting of the grains.
  • Document FR-A-1 311 351 discloses a grinding device constituted by a vertical fluidization enclosure containing a rotary mill placed in the fluidized bed and, downstream of this mill, bars whose presence reduces the apparent cross section of the enclosure in this area. However, these bars are located in the immediate vicinity of the rotor. Therefore, we observe with this device the same drawbacks as those mentioned above.
  • the object of the invention is to avoid the above drawbacks and to restore the advantages of small devices to large devices, that is to say to completely combine the effects of drying and / or heating and grinding with a coarse starting granular product and a treated product of finer and tighter particle size.
  • the intermediate zone or zones are located in the upper half of the vertical enclosure, preferably in the vicinity of two-thirds of the height of the vertical enclosure.
  • an intermediate zone prefferably constituted by transverse bars arranged on at least one horizontal level, for example on two levels in alternating or crossed parallel arrangement.
  • the intermediate zone is constituted by a grid and, according to another variant, by a diaphragm.
  • the reduction in effective cross section is of the order of 25 to 60% of the free cross section of the enclosure.
  • a vertical enclosure 1 of rectangular section at the base of which an ascending duct 2 opens for a gaseous fluidization and drive agent consisting of hot fumes produced by a combustion chamber 3 which delivers, in the pipe 2 through a venturi 4.
  • a rotating mobile 5 In the enclosure 1, and in the lower part thereof, is disposed a rotating mobile 5 with hammers of horizontal axis 6.
  • the height H of the part of the enclosure having a substantially constant rectangular section is 2.5 to 3 times the diameter of the rotating mobile 5.
  • bars 10 are arranged arranged in parallel on two rows 11 arranged alternately covering together about 50% of the free section of the enclosure.
  • the section is narrowed by a diaphragm 14 carried by the walls and reducing the effective section to around 50% of the free section of the enclosure.
  • This diaphragm 14 is surmounted by an inclined plane 15 to reduce the accumulation of dust.
  • FIGS. 7 and 8 the bars and the diaphragm are replaced by a grid 16 shown in FIG. 9.
  • the preferred mode is that which includes bars, because of the simplicity of installation, exchange and maintenance.
  • FIG. 10 shows the particle size breakdown of a raw coal and the products leaving various types of installation to be compared.
  • the opening of the meshs of the test colander (lower line) and the corresponding AFNOR module (upper line) is shown on the abscissa and on the ordinate the percentage of the pass of each mesh expressed on a logarithmic scale.
  • Curve A is that of rough coal at about 50% ⁇ 3.15 mm.
  • Curve B is cell of the same coal after treatment in a known type installation whose enclosure has a completely free cross section of 0.1 m 2 (0.56 x 0.18 m) over a height of 2 m with a mobile of 0.51 m in diameter with a peripheral speed of 17 to 20 m / s in the presence of smoke having, in the enclosure, the speed of 4 to 4.5 m / s.
  • a favorable curve B is obtained with approximately 95% ⁇ 3.15 mm and only 14% ⁇ 0.2 mm (to be compared with 11% of the starting carbon). This means that there was no overgrinding.
  • Curve C is that of the same coal after treatment in an installation also of known type, but extrapolated from the previous one, whose enclosure has a completely free cross section of 7.2 m 2 (3x2.4 m) over a height of 4 m with a 1.7 m diameter mobile having a peripheral speed of 17 to 20 m / s in the presence of smoke having, in the enclosure, the speed of 4 to 4.5 m / s. This time, 98% of 3.15 mm is obtained, but with more than 40% of ⁇ 0.2 mm, which is not admissible.
  • a solution is, in this case, to increase the speed of the gases up to 5 to 6 m / s, which leads to the curve D, which brings back to around 95% ⁇ 3.15 mm but still 35% ⁇ 0.2 mm, i.e. with too much shredded material.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Microbiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Food Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Disintegrating Or Milling (AREA)

Claims (8)

1. Anlage zur Trocknungs- und/oder Heiz- und Zerkleinerungsbehandlung eines körnigen Materials mit:
-einer vertikalen Fludisierungsbehandlungskammer (1), an deren Basis eine Leitung (2) eines gasförmigen Fluidisierungs- und Mitreißefluids sich öffnet, die um unteren Teil mit einer sich drehenden beweglichen Einrichtung (5) zum Zerkleinern mittels Schlägen oder Stößen mit horizontaler Achse (6) versehen ist, wobei diese Kammer über einen geraden im wesentlichen konstanten Querschnitt über eine Höhe von etwa dem 2,5-fachen wenigstens des Durchmessers des sich drehenden beweglichen Elements verfügt,
- Einrichtungen zum Einführen (7) an der Basis dieser Kammer eines zu behandelnden körnigen Materials,
- einer pneumatischen Mitreißeleitung (9) für das behandelte Material, die am oberen Teil dieser Fluidisierungsbehandlungskammer angeschlossen ist,
- einer Zwischenzone mit einerm scheinbar verminderten Querschnitt kleiner als dem der anderen Zonen der Kammer, der jedoch größer als der der Mitreißeleitung (9) ist, dadurch gekennzeichnet, daß diese Zwischenzone mit scheinbar vermindertem Querschnitt sich in der oberen Hälfte der vertikalen Kammer (1) etwa auf zwei Dritteln der Höhe dieser vertikalen Kammer (1) befindet.
2. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß die Zwischenzone Querstäbe (10) enthält, die auf wenigstens einem horizontalen Niveau (11) angeordnet sind und den scheinbar verminderten Querschnitt der vertikalen Kammer bilden.
3. Anlage nach Anspruch 2, dadurch gekennzeichnet, daß die Stäbe (10) dieser Zwischenzone auf zwei Niveaus (11) angeordnet sind.
4. Anlage nach Anspruch 3, dadurch gekennzeichnet, daß die auf den beiden Niveaus angeordneten Stäbe (10) parallel und abwechselnd angeordnet sind.
5. Anlage nach Anspruch 3, dadurch gekennzeichnet, daß die Stäbe der beiden Niveaus sich kreuzen.
6. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß die Zwischenzone durch ein Gitter (16) gebildet ist.
7. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß die Zwischenzone eine Membran (14) umfaßt.
8. Anlage nach einem der Ansprüche 1-7, dadurch gekennzeichnet, daß die Verminderung des Wirkquerschnitts in der Größenordnung von 25 bis 60% des freien Querschnitts der vertikalen Kammer (1) beträgt.
EP81400594A 1980-04-25 1981-04-14 Anlage zur Trocknungs- und/oder Heizungsbehandlung und Zerkleinerung von körnigem Material Expired EP0039270B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8009391 1980-04-25
FR8009391A FR2481147A1 (fr) 1980-04-25 1980-04-25 Installation pour le traitement par sechage et/ou chauffage et broyage d'un materiau granuleux

Publications (3)

Publication Number Publication Date
EP0039270A2 EP0039270A2 (de) 1981-11-04
EP0039270A3 EP0039270A3 (en) 1981-12-16
EP0039270B1 true EP0039270B1 (de) 1985-07-31

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ID=9241375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400594A Expired EP0039270B1 (de) 1980-04-25 1981-04-14 Anlage zur Trocknungs- und/oder Heizungsbehandlung und Zerkleinerung von körnigem Material

Country Status (9)

Country Link
EP (1) EP0039270B1 (de)
JP (1) JPS56166950A (de)
AU (1) AU540961B2 (de)
BR (1) BR8102316A (de)
CA (1) CA1167011A (de)
DE (1) DE3171551D1 (de)
FR (1) FR2481147A1 (de)
MX (1) MX152882A (de)
ZA (1) ZA812473B (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532734B1 (fr) * 1982-09-02 1987-06-26 Stein Industrie Dispositif de sechage d'un materiau en blocs humides et friables en echange de chaleur avec un gaz chaud
TR24518A (tr) * 1983-01-04 1991-11-12 Stein Industrie Nemli ve kolay ufalanabilir bloklar halindeki bir malzemeyi bir sicak gaz ile si
GB9317849D0 (en) * 1993-08-27 1993-10-13 Bpb Industries Plc Improvements in calcination
FR2924435B1 (fr) * 2007-11-30 2010-12-31 Inst Francais Du Petrole Procede et dispositif de torrefaction et de broyage en lit fluidise d'une charge de biomasse en vue d'une gazeification ou d'une combustion ulterieure
CN101825390B (zh) * 2010-04-27 2011-11-09 莱芜钢铁集团有限公司 一种双层振动流化床干燥分级装置
KR102178465B1 (ko) 2012-12-26 2020-11-16 에스케이이노베이션 주식회사 탄소연료 기류건조기
CN104097868A (zh) * 2014-07-09 2014-10-15 莱芜钢铁集团有限公司 一种振动流化床
CN109269260B (zh) * 2018-10-10 2020-12-15 连云港市农业科学院 一种风选除尘的水稻干燥设备
CN112844639A (zh) * 2021-01-27 2021-05-28 温州市靖浩贸易有限公司 一种自动适量上料和避免过载的液压破碎机
CN115183564B (zh) * 2021-04-02 2023-12-29 中冶长天国际工程有限责任公司 一种基于分布板的块矿预处理系统及方法
CN113883851B (zh) * 2021-08-31 2022-09-13 内蒙古万众炜业科技环保股份公司 一种兰炭节能生产用干燥装置及其工艺
CN115654877A (zh) * 2022-10-25 2023-01-31 上海樱沐机电工程有限公司 一种用于勃姆石加工的烘干装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1311351A (fr) * 1961-10-25 1962-12-07 Charbonnages De France Procédé et appareil de broyage et éventuellement de séchage de matériaux granuleux non agglutinants

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE688005C (de) * 1935-08-20 1940-02-10 Rheinmetall Borsig Akt Ges Muehlenfeuerung, bei der die Muehlenwelle senkrecht zur Brennkammerwand verlaeuft
US3794251A (en) * 1972-05-08 1974-02-26 Williams Patent Crusher & Pulv Material reducing system and apparatus
FR2305234A1 (fr) * 1975-03-24 1976-10-22 Charbonnages De France Installation de traitement combine de broyage, triage et sechage de materiaux granuleux
US3992266A (en) * 1975-07-24 1976-11-16 Inland Steel Company Recovery of coal fines from preheater

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1311351A (fr) * 1961-10-25 1962-12-07 Charbonnages De France Procédé et appareil de broyage et éventuellement de séchage de matériaux granuleux non agglutinants

Also Published As

Publication number Publication date
ZA812473B (en) 1982-04-28
BR8102316A (pt) 1981-12-08
JPS56166950A (en) 1981-12-22
DE3171551D1 (en) 1985-09-05
CA1167011A (fr) 1984-05-08
EP0039270A2 (de) 1981-11-04
AU6980281A (en) 1981-10-29
EP0039270A3 (en) 1981-12-16
FR2481147B1 (de) 1982-03-26
MX152882A (es) 1986-06-26
FR2481147A1 (fr) 1981-10-30
AU540961B2 (en) 1984-12-13

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