EP0325703A1 - Procédé de préparation de charbons ou de mélanges de charbons de fine granulation pour stockage sans danger, plus particulier pour le transport sans danger sur la route, sur mer ou par le chemin de fer - Google Patents

Procédé de préparation de charbons ou de mélanges de charbons de fine granulation pour stockage sans danger, plus particulier pour le transport sans danger sur la route, sur mer ou par le chemin de fer Download PDF

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Publication number
EP0325703A1
EP0325703A1 EP88117792A EP88117792A EP0325703A1 EP 0325703 A1 EP0325703 A1 EP 0325703A1 EP 88117792 A EP88117792 A EP 88117792A EP 88117792 A EP88117792 A EP 88117792A EP 0325703 A1 EP0325703 A1 EP 0325703A1
Authority
EP
European Patent Office
Prior art keywords
coal
screw
mixture
safe
rail
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Withdrawn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
EP88117792A
Other languages
German (de)
English (en)
Inventor
Wilhelm Wenz
Klaus Brücher
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.)
Gewerkschaft Sophia-Jacoba Steinkohlenbergwerk
Original Assignee
Gewerkschaft Sophia-Jacoba Steinkohlenbergwerk
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 Gewerkschaft Sophia-Jacoba Steinkohlenbergwerk filed Critical Gewerkschaft Sophia-Jacoba Steinkohlenbergwerk
Publication of EP0325703A1 publication Critical patent/EP0325703A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • C10L9/02—Treating solid fuels to improve their combustion by chemical means
    • C10L9/06—Treating solid fuels to improve their combustion by chemical means by oxidation
    • 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

Definitions

  • the invention relates to a process for the production of coal, or coal mixtures of small grain, which are safe in terms of storage, in particular road, rail and sea transport.
  • Coal or coal mixture with a small grain size is to be understood here and hereinafter as coal or mixtures with a grain size of up to 6 mm.
  • Road and track transport is to be understood as the national transport that takes a longer period of time in contrast to the internal transport.
  • a device is known from US Pat. No. 4,402,706 with which the spontaneous ignitability is to be removed from the treated coal.
  • the coal is passed through a sieve to dry the coal at a temperature of 54 - 121 ° C and the smallest Burning coal particles so that a temperature of the exhaust gas after burning these small particles of 104 - 510 ° C arises; the exhaust gas is fed to a cyclone.
  • the coal is passed through a container in which the coal oxidizes. This container has roof-shaped strips, under which air or oxygen supply pipes are arranged. -
  • the known method thus works with a fluidized bed with oxygen, after it has previously been dried separately at 54 - 121 ° C and exposed to combustion of its smallest components.
  • the coal is cooled after the treatment.
  • the object of the invention is to provide a method for producing said coal or coal mixtures, the storage and transport of which not only comply with the required safety regulations, but also make costly expenditure during storage and transport superfluous. Above all, however, higher performance should be achieved compared to known methods.
  • the device used to carry out the method should be space-saving. Above all, however, a difficult to control temperature control z. B. by burning coal particles to generate heat.
  • the targeted heat treatment of coal and coal mixtures according to the invention is based on the rehydration and pre-oxidation of known processes.
  • the invention provides for the direct action of heat on the coal or coal mixture when the coal is circulated in the mixer with the supply of oxygen.
  • the mixing arms transfer the heat directly to the coal or the mixture, so that the oxygen supply takes place with immediate and therefore simultaneous heating of the coal or the mixture.
  • Sufficient oxygen is also brought to the coal or mixture parts in a fluidized bed, but exact, uniform heating of this coal with simultaneous, intensive mixing with oxygen is not possible even when warm air is introduced into a fluidized bed.
  • a uniform heat treatment and simultaneous ventilation of all coal or mixture particles is crucial.
  • the input coal or coal mixture has a water content of a maximum of 2% by weight.
  • the treatment of coal or coal mixture that is damp with coal and is wet with processing can therefore be carried out in such a way that the water content is pre-dried to a max. 2% by weight is reduced.
  • the drawing shows the method with embodiments of the device that is preferably used.
  • a drum-like screw housing 1 is used, in which a screw is rotated, as is known to the person skilled in the art.
  • Another part 2 can be provided above the screw housing, which receives feeds and discharges.
  • the front end (the left end) of the housing has an inlet nozzle 3 for the coal or coal mixture to be fed in the direction of the arrow 4.
  • Another small nozzle 5 opens into the nozzle 3; through him air is supplied in the direction of arrow 6.
  • the coal or the coal mixture with the air thus enters the screw housing and between the screw flights of a screw 7 of the housing 1.
  • This is provided with a closed casing 8 in which the screw 7 rotates, which is on a screw shaft 9 is arranged.
  • the worm gear can be formed by interrupted blades 10, as shown in FIGS. 2 and 3, or by continuous blades.
  • the worm shaft 9 is designed as a hollow shaft. From it feed pipe 12 lead to the hollow wings 10 and discharge pipe 13 from the inside of the wing 10 to the shaft 9.
  • the worm shaft 9 is divided by a wall 14 into two chambers 15, 16, the oil from the chamber 15 being supplied to the wings 10 and is derived therefrom into the chamber 16.
  • the jacket 18 is designed as a hollow jacket and can also be acted upon with a heat-emitting medium, preferably oil.
  • a heat-emitting medium preferably oil.
  • the coal or coal mixture can be heated evenly between the vanes of the screw flight of the transport screw through this as well as the casing 18 by direct contact with these parts.
  • the heat-emitting medium preferably oil
  • the shaft 9 is introduced into the shaft through a connecting piece 19, while the oil is brought into the jacket 18 according to FIG. 3 via a line 20 becomes.
  • the oil of the jacket is discharged via a line 21, while the oil of the shaft 9 comes out of the device via line 22.
  • the treated material emerges from the device via the nozzle 23, the air being able to escape via the line 24.
  • FIG. 4 shows a diagram of the device with which the method according to the invention can be carried out.
  • the coal or coal mixture arrives in the direction of arrow 25 in a funnel 26 with a cellular wheel sluice 27. From there, the coal in turn arrives in a part 28 of the screw housing 29 in which a screw shaft 30 rotates with a screw 31.
  • the heated oil comes from an oil heater 32 and is fed via lines 33, 34 to both the shaft 30 of the screw and the jacket 35. In this case, the heat-emitting medium flows in countercurrent to the movement of the coal or coal mixture.
  • the oil emerges from lines 36, 37 and is discharged.
  • the air can be preheated by an air heater (not shown) and passes via line 39 and valves 40, 41 into the rear section of the housing in order to exit to a dust separator 43 via line 42 at the front section.
  • an air heater not shown
  • the housing 1 is filled to 50-75% with coal or a coal mixture so that there is sufficient space above the coal or mixture in which a sufficient volume of air can sweep over the material.
  • Thermometers 33a, 34a, 39a are arranged in the lines 33, 34 and 39, with the aid of which the oil of the screw 31 and the jacket 35 are checked and the amount of oil is regulated by means of the valves 36a, 37a.
  • the amount of air in the screw housing is also determined by the valves 40, 41 as a function of a temperature meter 39a regulated in line 39.
  • the coal or coal mixture of max 6 mm which has a water content of max. 2% by weight has been pre-dried, is heated in the screw housing to a temperature of 130-230 ° C for a period of 10 to 20 minutes, with a longer residence time in the vicinity of 20 minutes at a low temperature in the vicinity of 130 ° C. -Time is applied, while treatment time may be shorter when using a higher temperature.
  • the air strokes immediately and evenly over the constantly mixed coal or mixture, that is at the same time, which is essential, is exacerbated by the direct contact with the snail's wings and, if necessary, the jacket and comes into intensive contact with the oxygen evenly.
  • the material treated in the screw housing 29 passes directly and without delay through a lock 44 and the pipe 45 into a cooling device 46, which has the same or similar structure as the screw housing 29 with its individual parts.
  • the material entering the device 46 at 130-230 ° C. is cooled to 60-80 ° C. and below at least in the same time and amount as the coal or the coal mixture in the screw housing 29 is heated. (In order to avoid congestion in the device 46, the throughput takes place there somewhat faster than in the screw housing 29.)
  • Air of normal temperature is fed via line 47 to the device 46 and at a temperature of 40-60 ° C. via line 48 into line 39.
  • the coolant e.g. B. thermal oil
  • the treated material is drawn off via the tube 53 at a temperature of 60-80 ° C. and is now storable.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
EP88117792A 1988-01-22 1988-10-26 Procédé de préparation de charbons ou de mélanges de charbons de fine granulation pour stockage sans danger, plus particulier pour le transport sans danger sur la route, sur mer ou par le chemin de fer Withdrawn EP0325703A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3801800 1988-01-22
DE19883801800 DE3801800C1 (fr) 1988-01-22 1988-01-22

Publications (1)

Publication Number Publication Date
EP0325703A1 true EP0325703A1 (fr) 1989-08-02

Family

ID=6345787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88117792A Withdrawn EP0325703A1 (fr) 1988-01-22 1988-10-26 Procédé de préparation de charbons ou de mélanges de charbons de fine granulation pour stockage sans danger, plus particulier pour le transport sans danger sur la route, sur mer ou par le chemin de fer

Country Status (2)

Country Link
EP (1) EP0325703A1 (fr)
DE (1) DE3801800C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0527045A2 (fr) * 1991-08-05 1993-02-10 Robert J. Adams Procédé pour le traitement du charbon
EP0758677A1 (fr) * 1995-08-15 1997-02-19 Western Syncoal Company Charbon de qualité inférieure stabilisé et thermiquement amélioré et son procédé de fabrication

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE585794C (de) * 1930-08-03 1933-10-14 Erdoel Akt Ges Deutsche Vorrichtung zum Entwrasen der Braunkohle
DE651180C (de) * 1936-01-15 1937-10-09 Humboldt Deutzmotoren Akt Ges Kontakterhitzer zur Waermebehandlung von Schuettguetern aller Art, insbesondere zum Schwelen von Brennstoffen
US3723079A (en) * 1971-07-23 1973-03-27 Sun Research Development Stabilization of coal
EP0081763A2 (fr) * 1981-12-10 1983-06-22 Gewerkschaft Sophia-Jacoba Steinkohlenbergwerk Procédé pour la fabrication d'un charbon ou d'un mélange de charbons de granulométrie mince sans danger de stockage ou de transport

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192650A (en) * 1978-07-17 1980-03-11 Sunoco Energy Development Co. Process for drying and stabilizing coal
US4402706A (en) * 1981-12-21 1983-09-06 Atlantic Richfield Company Method and apparatus for oxidizing dried low rank coal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE585794C (de) * 1930-08-03 1933-10-14 Erdoel Akt Ges Deutsche Vorrichtung zum Entwrasen der Braunkohle
DE651180C (de) * 1936-01-15 1937-10-09 Humboldt Deutzmotoren Akt Ges Kontakterhitzer zur Waermebehandlung von Schuettguetern aller Art, insbesondere zum Schwelen von Brennstoffen
US3723079A (en) * 1971-07-23 1973-03-27 Sun Research Development Stabilization of coal
EP0081763A2 (fr) * 1981-12-10 1983-06-22 Gewerkschaft Sophia-Jacoba Steinkohlenbergwerk Procédé pour la fabrication d'un charbon ou d'un mélange de charbons de granulométrie mince sans danger de stockage ou de transport

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0527045A2 (fr) * 1991-08-05 1993-02-10 Robert J. Adams Procédé pour le traitement du charbon
EP0527045A3 (en) * 1991-08-05 1993-03-10 Robert J. Adams Method for treating coal
EP0758677A1 (fr) * 1995-08-15 1997-02-19 Western Syncoal Company Charbon de qualité inférieure stabilisé et thermiquement amélioré et son procédé de fabrication
US5863304A (en) * 1995-08-15 1999-01-26 Western Syncoal Company Stabilized thermally beneficiated low rank coal and method of manufacture
US6090171A (en) * 1995-08-15 2000-07-18 Western Syncoal Company Stabilized thermally beneficiated low rank coal and method of manufacture

Also Published As

Publication number Publication date
DE3801800C1 (fr) 1989-08-24

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