US3793743A - Apparatus for drying coal - Google Patents

Apparatus for drying coal Download PDF

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Publication number
US3793743A
US3793743A US00283155A US3793743DA US3793743A US 3793743 A US3793743 A US 3793743A US 00283155 A US00283155 A US 00283155A US 3793743D A US3793743D A US 3793743DA US 3793743 A US3793743 A US 3793743A
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United States
Prior art keywords
coal
fluid
fluidized bed
heat
drying
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Expired - Lifetime
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US00283155A
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English (en)
Inventor
R Kemmetmueller
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.)
AMERICAN WAAGNER BIRO CO INC US
WAAGNER BIRO AMERICAN
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WAAGNER BIRO AMERICAN
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    • 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
    • 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
    • F26B3/084—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 with heat exchange taking place in the fluidised bed, e.g. combined direct and indirect heat exchange
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Definitions

  • the coal in the form of [22] Filed: Aug. 23, 1972 coal particles, is fed into a'drying chamber where the coal is suspended in a fluidized bed while being dried [2]] P 283 in an atmosphere of steam which is at a temperature too low to release oxygen but high enough to extract [52] US. Cl. 34/57 A, 432/58, 202/150 sulphur from the coal particles.
  • pellets of calcium oxide 3,472,624 10/1969 Ridley 201/31 and/or magnesium oxide are delivered to the FOREIGN PATENTS O PP C T O bed together with the coal particles for further 6X- I tracting sulphur from the atmosphere in the fluidized 1,201,701 l/l960 France 165/170 bed these pellets also being Subsequently treated as by roasting, to extract sulphur therefrom.
  • the present invention relates to apparatus for drying coal.
  • the present invention relates in particular to such apparatus as used in connection with coke plants where coal is converted into coke which is then available for use in blast furnaces, for example.
  • coal particles are delivered to the interior of a drying chamber which is closed off from the outer atmosphere and the coal particles are dried in the drying chamber by utilizing for drying purposes steam which is at a temperature high enough to extract sulphur from the coal during drying thereof while at the same time the temperature of the steam is maintained low enough to prevent separation of oxygen from the steam.
  • the drying steam is used to form a fluidized bed from the coal particles, and in the fluidized bed there are heating coils which control the temperature of the fluidized bed while at the same time further drying the coal by direct contact with the coal suspended in the fluidized bed.
  • Hydrogen sulfide is formed in the drying chamber as a result of extraction of sulphur from the coal, and this hydrogen sulfide is treated in a number of ways so as to extract the sulphur as a by-product of the method and apparatus of the invention.
  • the coal which is discharged from the dryer in a preheated condition free of moisture and sulphur is delivered directly to the coke oven battery, to achieve in this way a reduction of the operating time of a coke oven battery which is on the order of 50 percent.
  • Water which is condensed from gas which is discharged from the coal dryer is used to quench gas issuing from the coke oven battery, and heat extracted from the coke during dry-quenching thereof is used for heating in a heat exchanger steam which is used for drying the coal, so that in this way considerable economies are achieved.
  • FIG. 1 is a schematic representation of an apparatus according to the invention
  • FIG. 2 is a schematic sectional plan view taken along I line 22 of FIG. 1 in the direction of the arrows and illustrating the interior of.a coal dryer of the invention
  • FIG. 3 isan elevation taken along line 3-3 of FIG. 2 in the direction of the arrows and illustrating one of the partition walls which includes heating coils as a part thereof;
  • FIG. 4 is a fragmentary sectional elevation taken along line 4-4 of FIG. 3 in the direction of the arrows to illustrate further details of the structure of FIG. 3;
  • FIG. 5 is a fragmentary schematic illustration of the manner in which the coal is treated in the coal drying of the invention.
  • FIG. 1 there is illustrated therein a coaldrying installation according to the present invention.
  • the coal-drying installation includes a housing means 10 which is closed off from the outer atmosphere and which defines in itsinterior a drying chamber 12, as indicated schematically in FIG. 1.
  • a coal-feeding means 14 is provided for feeding particles of coal into the housing means 10 so that drying of the coal will take place in the drying chamber 12.
  • the coal is initially stored in bunkers 16. From the bunkers 16 the coal flows through grinding units 18 so as to be reduced in this way to particles of a predetermined size.
  • grinding units 18 For ex- I suitable way, as by a pump 24,
  • the drying of the coal takes place by exposing the coal particles in the drying chamber 12 to an atmosphere of steam which is maintained at a temperature low enough to prevent release of oxygen from the steam but high enough to drive sulphur out of the particles of coal during the drying thereof.
  • moisture and sulphur will be driven off from the particles of coal due to the drying action which takes place in the chamber 12.
  • the atmosphere of steam in the chamber is maintained at a temperature on the order of 250 C, since at this temperature organically bound H 3 will be driven off from the particles of coal.
  • the temperature of the steam in the drying chamber 12 is maintained at a temperature lower than 500 C, there will beno release of free oxygen from the steam, and the danger of explosions will be avoided.
  • the steam used for drying purposes in the housing means is derived from a heat-exchanger means shown schematically in FIG. 1 between the housing means 10 and a bunker 22 in which coke from a coke oven is cooled by.dry-quenching.
  • gas which is used for quenching the coke in the bunker 22 circulates, after being heated by the coke which is cooled in the bunker 22, through the heat exchanger means 20.
  • part of the steam-supply means includes a portion 30 of the conduit 26 which communicates with a plenum formed at a lower interior portion of the housing means 10, the flow of the steam into the plenum being controlled by a valve 32.
  • the plenum 34 is defined beneath an apertured wall 36 which is carried by and extends across the interior of the housing means 10.
  • This wall 36 may be constructed in any known way to form a fluidized bed of the coal particles with the steam issuing up through the wall 36, so that in this way the coal particles are maintained in a fluidized bed in the chamber 12 and the wall 36 together with the plenum 34 forms a fluidizing means for forming a fluidized bed of the coal particles.
  • the wall 36 may take the form of a wall carrying suitable nozzles, or it may take theform of a suitably apertured plate, or it may be composed of a mesh of rods, all of which is well known in the art.
  • the steam supplied by the steam-supply means 30 will maintain the particles of coal suspended in a fluidized bed in the drying chamber 12.
  • the dry coal issues from the housing means 10 through a discharge means 38 which may take the form of a suitable discharge duct the diameter of which is such that in combination with the rate of supply of coal particles by the supply means 14 and the treatment of the coal in the fluidized bed there will be an issue of dry coal at a preselected rate from the discharge means 38.
  • the steam in the drying chamber 12 has its temperature regulated by way of a heating means 40 which takes the form of coils through which steam flows, these coils forming parts of partition walls in the manner described in greater detail below.
  • the steam for the heating means 40 is also derived from the supply means 26.
  • the conduit 26 has a branch 42 provided with a control valve 44 and communicating with the heating means 40 so as to deliver to the latter the same steam which is delivered to the plenum 34.
  • a greater amount of steam is delivered to the heating means 40 while only a relatively small amount of steam is delivered to the plenum 34.
  • the same single source of steam namely the-conduit 26 which derives its steam from the heat exchanger means 20 is used for supplying steam both to the heating means 40 and to the fluidizing means 34, 36.
  • the steam discharges back to the inlet pipe 46 which delivers the feedwater to the pump 24, a return flow pipe 48 being provided for this purpose.
  • the returning fluid from the heating means 40 is combined with the feedwater to be fed back to the heat exchanger and reheated before being returned to the heating means 40, and the feedwater will make up for losses such as that which occurs in connection with the supply of steam to the plenum 34.
  • the heating means 40 takes the form of a relatively large number of parallel plates 50 which are spaced from each other and mounted in any suitable way in the interior of the housing means 10, as shown schematically in FIG. 2.
  • the supply pipe 42 communicates with a suitable header 52 which in turn communicates with the several plates 50 each of which has a construction as described below and illustrated in FIGS. 3 and 4.
  • each plate 50 is in the form of a wall 54 having coils 56 as a part thereof.
  • each wall 54 is composed of a pair of plate portions 54a and 54b which are fixed in any suitable way to each other. These plate portions 54a and 54b are formed with grooves which register with each other when the plate portions are joined together, so that in this way each wall 54 will have as a part thereof the coils 56 which may have a configuration as shown schematically in FIG. 3.
  • the walls 54 may be 5 I spaced from each other by a distance D which is on the order of 4 inches, with the coils 56 having a diameter on the order of 2 inches.
  • the parallel walls 54 of the heating means 40 form partitions which define between themselves upright spaces having a width on the order of 4 inches, and it is in these relatively narrow spaces that the coal particles are confined in the fluidized bed above the apertured wall 36.
  • This wall 36 is shown in FIG. 5, schematically, as including the nozzles which direct the steam-from the plenum 34 upwardly into the drying chamber to maintain the fluidized bed of coal.
  • A- further advantage achieved with the construction shown in FIG. 5 resides in the fact that the particles of coal repeatedly come directly in contact with the walls 54 and particularly with the heating coils 56 thereof, so that not only is the coal heated by way of the steam in the fluidized bed, but in addition it is heated by way of direct contact with the heating means, so that the drying of the coal is enhanced by contact-drying of the coal as a result of engagement of the coal particles directlywith the heating means 40.
  • the coal which issues from the discharge means 38 is free of ammonia, water, and sulphur, and is in a preheated condition which is ideal for direct supply to a coke oven.
  • an inert gas may be supplied to the plenum 34 by way of a conduit 58 which is capable of being ,open and closed by way of a valve 60.
  • a conduit 58 which is capable of being ,open and closed by way of a valve 60.
  • nitrogen or cleaned stack gas may be used as the-inert gas.
  • the inert gas may be preheated so that it will have a suitable temperature.
  • the conduit 58 may communicate with coils in the heat exchanger 20 to which the inert gas is supplied so that the inert gas is heated by extracting heat from the dry-quenching gas which is heated as described above when flowing through the circuit 24.
  • the sulphur content of the'atmosphere in the drying chamber 12 is reduced by operatively connecting with the housing means 10 a supply means 66 for supplying to the drying chamber 12 pellets which will extract sulphur from the atmosphere in the chamber 12.
  • pellets may be calcium oxide and/or magnesium oxide pellets having a diameteron the order of one-half inch in the case where the coal particles have a diameter on the order of one-eighth inch.
  • These pellets when progressing through the fluidized bed to the discharge means 38 combine with sulphur to form Ca So 'and/or Mg 80,.
  • the latter pellets are discharged together with the coal particles onto a sizing screen 68 by the discharge means 38.
  • the mesh of the sizing screen is such that the smaller coal particles fall downwardly through the screen onto a conveyer 70 which conveys the dry preheated coal to the coke oven.
  • the pellets which-do not fall through the screen travel along the latter and drop onto a conveyer 72 which delivers the pellets to roasting ovens where the pellets return to their initial composition with extraction of sulphur dioxide therefrom.
  • housing means defining an interior drying chamber closed off from the outer atmosphere, coal feeding means operatively connected with said housing means for feeding to the interior thereof coal particles to be dried in said drying chamber, fluidizing means carried by said housing in the interior thereof beneath said drying chamber for forming a fluidized bed of coal particles in said drying chamber, tubular heating means situated in said drying chamber for controlling the interior temperature thereof and for directly contacting coal particles in the fluidized bed, fluid-supply means communicating with said tubular heating means for supplying heating fluid I supplied to said tubular heating means operatively connected with said fluid-supply means for heating the fluid supplied thereby to saidtuthereto and wherein said fluid-supply means also communicates with said fluidizing means for supplying to the latter a ,fluidizing fluid which is the same as the fluid means, heat-exchanger bular heating means, coke-cooling means for dryquenching coke from a coke oven, said coke-cooling means being operatively connected with said heatexchanger means for
  • each of said walls is formed by a pair of flat plates joined to gether with each plate having outwardly bulging portions forming grooves at an inner side of each plate and corresponding projections at an outer side thereof, said pair of plates being placed together with said grooves in register to form said coils.
  • said fluidizing means includes a gas-supply means for supplying an inert gas to be used for forming the fluidized bed, said inert gas being different from the fluid supplied to said tubular heating means.
  • valve means forms part of said fluid-supply means for controlling the flow of heating fluid from said heatexchanger means through said fluid-supply means to said tubular heating means for regulating the temperature of the latter.
  • a pelletfeeding means is operatively connected with said housing means for feeding to said drying chamber pellets to react chemically with the atmosphere in said chamber, said pellets having a size different from said coal particles and being discharged with said coal particles by said discharge means, and separating means located adjacent said discharge means for receiving the dry coal and pellets therefrom and for separating the pellets and the coal from each other.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coke Industry (AREA)
  • Drying Of Solid Materials (AREA)
US00283155A 1972-08-23 1972-08-23 Apparatus for drying coal Expired - Lifetime US3793743A (en)

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US28315572A 1972-08-23 1972-08-23

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US (1) US3793743A (de)
JP (1) JPS56473B2 (de)
CA (1) CA1029945A (de)
DE (1) DE2342184B2 (de)
IT (1) IT994650B (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848344A (en) * 1972-08-09 1974-11-19 Waagner Biro American Bunker-boiler installations
US4152110A (en) * 1978-01-03 1979-05-01 Dorr-Oliver Incorporated Dry coal feed systems for combustion reactors
US4240877A (en) * 1978-05-02 1980-12-23 Firma Carl Still Gmbh & Co. Kg Method for preheating coal for coking
US4292742A (en) * 1978-06-21 1981-10-06 Stal-Laval Turbin Ab Plant for drying fuel
US4338160A (en) * 1979-07-30 1982-07-06 Charbonnages De France Process for drying and/or preheating coal
EP0066095A2 (de) * 1981-05-29 1982-12-08 Krupp Koppers GmbH Verfahren zum Betrieb einer Kokereianlage
EP0537637A1 (de) * 1991-10-14 1993-04-21 Tsukishima Kikai Kabushiki Kaisha Schlammtrocknungssystem
EP0713070A1 (de) * 1994-11-21 1996-05-22 Powdering Japan K.K. Wirbelbeschichtanlage zur Trocknung oder Kühlung von Pulver und Verfahren zur Trocknung oder Kühlung von Pulver unter Verwendung desselben
CN100400996C (zh) * 2006-07-19 2008-07-09 山东天力干燥设备有限公司 氮气循环煤粉气流内加热流化床干燥工艺
CN101464086B (zh) * 2009-01-06 2010-06-09 王旗 蔗渣的强搅拌并流式烟道气干燥流程
US20130333280A1 (en) * 2010-12-22 2013-12-19 Mitsubishi Heavy Industries, Ltd. Method for gas treatment of coal
CN103602360A (zh) * 2013-11-15 2014-02-26 华电电力科学研究院 褐煤流化床干燥与提质的装置及其工艺

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2647079C2 (de) * 1976-10-19 1983-12-08 Carl Still Gmbh & Co Kg, 4350 Recklinghausen Verfahren zum Betrieb von batterieweise angeordneten Verkokungsofenkammern in Verbindung mit einer Vortrocknungsanlage für die zu verkokende Kohle sowie Vorrichtung zu seiner Durchführung
DE2810694C2 (de) * 1978-03-11 1985-06-27 Alfelder Eisenwerke Carl Heise, KG vorm. Otto Wesselmann & Cie., 3220 Alfeld "Verfahren zur Vortrocknung von feinkörniger Steinkohle und zur Weiterverarbeitung zu hochwertigem Steinkohlenkoks"
DE2818456C2 (de) * 1978-04-27 1981-09-17 Fa. Carl Still Gmbh & Co Kg, 4350 Recklinghausen Verfahren zur Herstellung von abriebfesten Koksformlingen aus Steinkohlen-, Braunkohlen- oder Torfbriketts
DE3033461C2 (de) * 1980-09-05 1982-11-04 Alfelder Eisenwerke Carl Heise, KG vorm. Otto Wesselmann & Cie., 3220 Alfeld Verfahren zur Trocknung und Vorerhitzung von feinfkörniger Steinkohle unter Verwendung nicht oder nur schwach backender Kohle und/oder Kohlenstoffträgern
DE3123141A1 (de) * 1981-06-11 1982-12-30 Krupp-Koppers Gmbh, 4300 Essen Verfahren und vorrichtung zum betrieb einer kokereianlage
JPS62177093A (ja) * 1986-01-29 1987-08-03 Kawasaki Steel Corp コ−クス炉用調湿炭の製造方法
DD271945A1 (de) * 1988-05-11 1989-09-20 Orgreb Inst Kraftwerke Vorrichtung zur verteilung des eintragsgutes ueber eine wirbelschicht
DE102012012417B4 (de) * 2012-06-25 2019-06-13 Thyssenkrupp Industrial Solutions Ag Verfahren und Vorrichtung zur verbesserten Vorerhitzung von Kohle durch Wärmetausch mit dem Kühlgas einer Kokstrockenkühlanlage

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1854407A (en) * 1927-11-03 1932-04-19 U G I Contracting Company Means for preheating coal and cooling coke
US2658862A (en) * 1950-06-09 1953-11-10 Reilly Tar & Chem Corp Process for the defluidization and fixed-bed coking of a preheated fluidized coal
FR1201701A (fr) * 1958-07-10 1960-01-05 Continentale De Procedes De So échangeur de chaleur
US3362083A (en) * 1967-07-07 1968-01-09 Nat Gypsum Co Gaseous apparatus for cooling pulverulent material
US3387590A (en) * 1967-03-16 1968-06-11 Interior Usa System for regulating the total heat output in a burning fluidized bed heat exchanger or boiler
US3472624A (en) * 1967-04-05 1969-10-14 Tidewater Oil Co Desulfurization of particulate coke
US3609874A (en) * 1968-04-17 1971-10-05 Jiyuichi Nara Apparatus for fluidizing and drying pulverant materials
US3611585A (en) * 1968-06-19 1971-10-12 Jiyuichi Nara Apparatus for drying pulverant materials

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1854407A (en) * 1927-11-03 1932-04-19 U G I Contracting Company Means for preheating coal and cooling coke
US2658862A (en) * 1950-06-09 1953-11-10 Reilly Tar & Chem Corp Process for the defluidization and fixed-bed coking of a preheated fluidized coal
FR1201701A (fr) * 1958-07-10 1960-01-05 Continentale De Procedes De So échangeur de chaleur
US3387590A (en) * 1967-03-16 1968-06-11 Interior Usa System for regulating the total heat output in a burning fluidized bed heat exchanger or boiler
US3472624A (en) * 1967-04-05 1969-10-14 Tidewater Oil Co Desulfurization of particulate coke
US3362083A (en) * 1967-07-07 1968-01-09 Nat Gypsum Co Gaseous apparatus for cooling pulverulent material
US3609874A (en) * 1968-04-17 1971-10-05 Jiyuichi Nara Apparatus for fluidizing and drying pulverant materials
US3611585A (en) * 1968-06-19 1971-10-12 Jiyuichi Nara Apparatus for drying pulverant materials

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848344A (en) * 1972-08-09 1974-11-19 Waagner Biro American Bunker-boiler installations
US4152110A (en) * 1978-01-03 1979-05-01 Dorr-Oliver Incorporated Dry coal feed systems for combustion reactors
US4240877A (en) * 1978-05-02 1980-12-23 Firma Carl Still Gmbh & Co. Kg Method for preheating coal for coking
US4292742A (en) * 1978-06-21 1981-10-06 Stal-Laval Turbin Ab Plant for drying fuel
US4338160A (en) * 1979-07-30 1982-07-06 Charbonnages De France Process for drying and/or preheating coal
EP0066095A2 (de) * 1981-05-29 1982-12-08 Krupp Koppers GmbH Verfahren zum Betrieb einer Kokereianlage
EP0066095A3 (en) * 1981-05-29 1984-03-28 Krupp-Koppers Gmbh Process for operating a coke oven plant
US5283959A (en) * 1991-10-14 1994-02-08 Tsukishima Kikai Kabushiki Kaisha System for drying moist sludge
EP0537637A1 (de) * 1991-10-14 1993-04-21 Tsukishima Kikai Kabushiki Kaisha Schlammtrocknungssystem
EP0713070A1 (de) * 1994-11-21 1996-05-22 Powdering Japan K.K. Wirbelbeschichtanlage zur Trocknung oder Kühlung von Pulver und Verfahren zur Trocknung oder Kühlung von Pulver unter Verwendung desselben
US5867921A (en) * 1994-11-21 1999-02-09 Powdering Japan K.K. Fluidized bed apparatus for drying or cooling of powder and a process for drying or cooling powder with the same
CN100400996C (zh) * 2006-07-19 2008-07-09 山东天力干燥设备有限公司 氮气循环煤粉气流内加热流化床干燥工艺
CN101464086B (zh) * 2009-01-06 2010-06-09 王旗 蔗渣的强搅拌并流式烟道气干燥流程
US20130333280A1 (en) * 2010-12-22 2013-12-19 Mitsubishi Heavy Industries, Ltd. Method for gas treatment of coal
US9085739B2 (en) * 2010-12-22 2015-07-21 Mitsubishi Heavy Industries, Ltd. Method for gas treatment of coal
CN103602360A (zh) * 2013-11-15 2014-02-26 华电电力科学研究院 褐煤流化床干燥与提质的装置及其工艺
CN103602360B (zh) * 2013-11-15 2016-01-20 华电电力科学研究院 褐煤流化床干燥与提质的装置及其工艺

Also Published As

Publication number Publication date
DE2342184B2 (de) 1976-12-23
CA1029945A (en) 1978-04-25
JPS56473B2 (de) 1981-01-08
DE2342184A1 (de) 1974-03-14
JPS4986402A (de) 1974-08-19
IT994650B (it) 1975-10-20

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