EP0030376A2 - Procédé et dispositif de séchage et de réchauffage de charbon humide - Google Patents

Procédé et dispositif de séchage et de réchauffage de charbon humide Download PDF

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Publication number
EP0030376A2
EP0030376A2 EP80107653A EP80107653A EP0030376A2 EP 0030376 A2 EP0030376 A2 EP 0030376A2 EP 80107653 A EP80107653 A EP 80107653A EP 80107653 A EP80107653 A EP 80107653A EP 0030376 A2 EP0030376 A2 EP 0030376A2
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EP
European Patent Office
Prior art keywords
inert gas
coal
circuit
drying
gas circuit
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
EP80107653A
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German (de)
English (en)
Other versions
EP0030376A3 (en
EP0030376B1 (fr
Inventor
August Ing.Grad. Schaper
Heinrich Ing.Grad. Mohmeyer
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.)
Cessione amman Ima GmbH
Original Assignee
Alfelder Eisenwerke Carl Heise KG
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Filing date
Publication date
Application filed by Alfelder Eisenwerke Carl Heise KG filed Critical Alfelder Eisenwerke Carl Heise KG
Publication of EP0030376A2 publication Critical patent/EP0030376A2/fr
Publication of EP0030376A3 publication Critical patent/EP0030376A3/de
Application granted granted Critical
Publication of EP0030376B1 publication Critical patent/EP0030376B1/fr
Expired legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/028—Arrangements for the supply or exhaust of gaseous drying medium for direct heat transfer, e.g. perforated tubes, annular passages, burner arrangements, dust separation, combined direct and indirect heating
    • 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
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
    • F26B21/40—Arrangements for supplying or controlling air or other gases for drying solid materials or objects using gases other than air

Definitions

  • the invention relates to a method for drying and heating moist coal, in particular fine and very fine coal, in which the coal to be dried is supplied with heat via an inert gas circuit, which can be heated with the aid of a heat exchanger, and the dried and heated coal with a Partial circuit of the inert gas is protected from the entry of oxygen.
  • the invention also shows an apparatus for performing the method.
  • DE-A 28 10 694 shows a method of the type described in the introduction, in which fine coal for the production of high-quality coke with an oxygen-free heating medium is dried and heated.
  • Water vapor is used as the inert gas, which develops when the coal to be dried is heated from the moisture that is carried in by the moist coal.
  • the inert gas circuit is indirectly heated by a heat exchanger.
  • the inert gas circuit must also be cleaned in a dedusting system, with the entrained coal particles being separated. Used as E nt dedusting plant a cyclone used, then it is due to the low density of coal and large fines insufficient cleaning.
  • the fine parts of the coal are also deposited on the heat exchanger, and considerably impair the heat transfer.
  • the known method works on the countercurrent principle. This is disadvantageous insofar as the inert gas heated in the heat exchanger with its hottest inlet temperature meets the already dried coal at the outlet of the drying system. Here there are signs of overheating. In addition, the hot fines from the coal are taken in countercurrent. These migrate back to the entrance of the drying facility and can be deposited there again on the wet coal particles. This results in an accumulation of the fine particles in the drying device, so that their resistance increases. This affects the inert gas cycle.
  • DE-A 26 59 335 shows a cabbage drying and heating system which works with an entrained-flow dryer and a downstream entrained-flow heater for the coal and in which a directly fired gas circuit is firstly conducted in direct current through the entrained-current heater and then through the entrained-current dryer. Air in the form of combustion air is also introduced into the gas-operated combustion chamber, so that the oxygen content in the circuit of the heat transfer medium is poor is manageable. In spite of vapor recirculation, deflagration phenomena and explosions cannot be avoided with this known coal heating system. The system also works with an electrostatic precipitator, whereby the coal separated there is added to the dried coal.
  • two short-circuit lines are arranged, both of which bridge the entrained-flow dryer and serve to raise or regulate the temperature in a cyclone separator and in the electrostatic filter.
  • the fan provided in the circuit of the heat transfer medium conveys in addition to the vapor return immediately into the electrostatic filter and then into the chimney, so that there is an additional risk that air at leaky points in the system and thus oxygen will get into the circuit of the heat transfer medium.
  • the invention has for its object to develop the method of the type described in such a way that a system can be started up and shut down without the risk of deflagration, burns and explosions. Furthermore, such "Coal drying plant solves the problems associated with dedusting and maintaining the filter effect.
  • the process according to the invention is characterized in that, during the start-up process, before the coal drying begins, the air present in the system is circulated and heated via a heat exchanger in that water or water vapor is introduced into the heated air cycle and the air cycle is enriched with water vapor and so on Intertgas cycle is formed.
  • An inert gas circuit is therefore first created from the air circuit without drying the coal by indirectly heating the air present in the system, that is to say without necessarily introducing further oxygen. Water or water vapor is then introduced into the heated air circuit, water introduced as a result of the heat evaporating. It goes without saying that air mixed with water vapor is also discharged or led out of the circuit.
  • the dried coal is first led out of the drying zone.
  • the inert gas cycle is maintained by introducing water or steam until all coal has left the weighing and mixing device. Only then will the inert gas circuit be replaced by an air circuit.
  • the inert gas circuit is passed in cocurrent over the coal to be dried, so that an enrichment of the fine fractions of the coal in the drying device is avoided. At the same time, this means gentle treatment of the coal and, in contrast to drying in the entrained flow process, the circulation of considerable amounts of gas and the mechanical stress on the coal are thereby avoided.
  • the device for drying and heating moist coal works with a drying device, an inert gas circuit which can be heated indirectly via a heat exchanger and which is passed once through the drying device and in a partial circuit via a mixer for dried coal, with a dedusting device in the inert gas circuit and with a heat source connected to the heat exchanger.
  • the drying device is a driven drying drum which is connected to the inert gas circuit in direct current and which is a pre-separator and cooler in the inert gas circuit as well as a cloth filter dedusting; the inert gas circuit has a lockable supply line for water or steam and a further lockable supply line for air.
  • the coal is gently dried, the highest temperature of the inert gas circuit acting on the moist coal, so that overheating at the exit of the drying drum on the dried coal is avoided and the temperature profiles can be controlled more easily and better.
  • This also makes it possible to use a pre-cutter and cooler as well as a cloth filter dedusting system in the inert gas circuit, which can achieve the required cleaning of the inert gases when working dry.
  • the lockable supply line for water or steam serves for the start-up process, while the further lockable supply line for air is required when the system is switched off.
  • the inert gas circuit has two short-circuit lines, each provided with controllable shut-off devices, one of which is connected between the heat exchanger and the drying drum and leads into the line between the drying drum and the pre-separator and cooler, while the other branches off after the cloth filter dedusting and after the downstream fan and front heat exchanger and While the first short-circuit line is used to increase the temperature in the cloth filter dedusting, the second short-circuit line serves to lower the temperature in the cloth filter dedusting. It is understood that in this way the cloth filter dedusting can be carried out in an optimal temperature range that falling below the dew point and thus education of sulphurous acid and water condensation.
  • the upstream pre-separator and cooler can also be used to lower the temperature in the cloth filter dedusting.
  • the cooling device on the pre-separator expediently consists of several fans which can be switched on or off accordingly.
  • the partial circuit of the inert gas circuit intended to protect the dried coal branches off after the fan and is returned to the inert gas circuit, bridging the drum between the drying drum and the pre-separator and cooler.
  • the dried coal is thus effectively protected against the entry of atmospheric oxygen even after it has left the drying drum until it has been subjected to a desired processing.
  • the material silo, the weighing and mixing device and the conveyor section of the coal are rendered inert. This can be done by depositing it in a silo. It is also possible to coat the dried coal with a binder, preferably a bituminous binder; this is particularly useful if the coal is then to be coked.
  • a controllable shut-off device is arranged both in the inert gas circuit upstream of the heat exchanger and before the branching of one short-circuit line and in the branching partial circuit.
  • These two shut-off devices control the quantity distribution of the inert gas for the inert gas circuit on the one hand and for the partial circuit on the other. It goes without saying that this quantity control can also influence the temperatures at the respective parts of the system.
  • Circulation of the inert gas to protect the dried coal can include a mixer, a weighing device and an intermediate silo. It goes without saying that other devices for the dried coal can also be provided here, which are then expediently also included in the partial circuit, provided that the temperature of the dried coal is still in a dangerous range in such plant parts.
  • the lockable supply line for water or water vapor is expediently connected to the inert gas circuit at the entrance to the drying drum.
  • the shut-off supply line for air is expediently connected to the inert gas circuit between the dust filter and the fan, so that here air is sucked in and mixed with the inert gas in a simple manner.
  • the temperature in the dedusting system is initially not reduced, so that no condensation can occur.
  • the heat exchanger connected to the inert gas circuit is, on the other hand, connected to a heating circuit which has an exhaust gas recirculation in which a controllable shut-off element is provided.
  • a heating circuit which has an exhaust gas recirculation in which a controllable shut-off element is provided.
  • the system also has a pre-separator and cooler 5, as well as a cloth filter dedusting device 6 connected downstream thereof.
  • a fan 7 is provided downstream for circulating the heat transfer medium or the inert gas circuit and the partial circuit.
  • a heat exchanger 8 is used for indirect heating of the inert gas circuit.
  • the heat exchanger 8, on the other hand, is connected to a heating circuit 9, which ultimately leads to the exhaust stack 10 and has an exhaust gas recirculation 11.
  • a mixed gas fan 12 and a controllable shut-off device 13 are arranged.
  • a burner 14 is heated with gas or another medium which is drawn off via a line or a storage tank 15.
  • the combustion air for the burner 14 is brought in via the air fan 16.
  • the exhaust gases can be returned via the return line 11 after passing through the heat exchanger 8 and mixed in a mixing chamber 17 with the combustion exhaust gases.
  • the inert gas circuit leads with a line 18 from the heat exchanger 8 to the entrance into the drying drum 4.
  • the inert gas circuit of line pieces 19, 20, 21 22 and 23 completed.
  • the line piece 19 is connected between the output of the drying drum 4 and the input of the pre-separator and cooler 5, which, moreover, can be blown with cooling air by a blower (not shown) according to the arrows 24 and thus the temperature of the inert gas can be reduced.
  • the line piece 20 connects the outlet of the pre-separator and cooler 5 with the cloth filter dedusting 6; the output of which is connected to the blower 7 via the line piece 21.
  • the line section 22 leads to a controllable shut-off device 25, from which the line section 23 leads to the heat exchanger 8.
  • the inert gas circuit 18 to 23 is formed from the line 18 and the line sections 19, 20, 21, 22 and 23.
  • two short-circuit lines 26 and 27 are provided, in which controllable shut-off devices 28 and 29 are arranged.
  • a feed line 30 for water or water vapor and a control device 31 are provided, which are required for start-up purposes.
  • the feed line 32 is required when the system is switched off.
  • the dried coal passes from the outlet of the drying drum 4 via an encapsulated conveying device 34 into a bucket elevator 35 and from there into an intermediate silo 36, from which it can be transferred in batches to a weighing device 37, from which the coal in turn reaches the mixer 38.
  • the coal can then finally be deposited in a silo 39 or be used for the corresponding purpose.
  • the mixer 38 it is possible to coat the dried coal with a binder, preferably a bituminous binder. This is fed from the binder tank 40 into the mixer 38 via the injection device 41.
  • the binder tank 40 is kept at the desired processing temperature by a thermal oil heating unit 42.
  • the partial circuit 43 to 47 formed from the line pieces 34 to 47 branches off from the line piece 22. This partial circuit 43 to 47 of the inert gas protects the dried coal and the relevant parts of the plant over which it is guided.
  • the short-circuit line 24 branches off from the line piece 23, but also the inert gas outlet line 48, in which the adjustable pressure relief valve 49 is provided and which ultimately leads to the exhaust stack 10.
  • An overpressure is always maintained in the inert gas circuit 1 to 23 and in the partial circuit 43 to 47 via this pressure relief valve 49.
  • gas is continuously released to the flue gas stack 10 via the pressure relief valve 49 both during the start-up phase and during the operation of the installation, because the water introduced or the coal entrains it Water is continuously enriched with water vapor.
  • the pre-separator and cooler 5 as well as the cloth filter dedusting 6 are connected to the bucket elevator 35 via screw conveyors 50, so that the dry coal separated in the pre-separator 5 and the cloth filter dedusting 6 is added again to the dried coal brought up via the conveying line 34.
  • the fan 7, the drying drum 4 and various other system parts are started.
  • the heating circuit 9 is then released by igniting the burner 14 for the development of heat, the associated system parts such as air fan 16 and mixed gas fan 12 also having to be switched on.
  • Heat is transferred to the circuit filled with air via the heat exchanger 6.
  • water is sprayed into the drying drum 4 by the control device 31 for water via the feed line 30. The water evaporates through the hot inlet gases. The resulting steam increases the amount of vapors in circulation.
  • the controllable overpressure valve 49 When a certain overpressure on the drying drum is reached, the controllable overpressure valve 49 is set ready for opening so that it can discharge a partial gas flow into the exhaust gas stack 10.
  • the amount of water supplied is measured so that the water vapor produced is sufficient to reduce the oxygen content in the circulating vapors below 2%, preferably below 1%.
  • This start-up process will take about 5 minutes.
  • This can be used to start drying the coal by switching on the material conveyor 2 and removing moist coal from the material silo 1 and feeding it to the drying drum 4 via the cellular wheel lock 3. It goes without saying that at this point in time no more water is inserted via the feed line 30.
  • the moist coal to be dried reaches the material silo 1 in some way, for example with the aid of a shovel loader.
  • the material conveyor 2 is equipped with a direct current control drive.
  • the quantity discharged can be measured volumetrically by hand or set manually from a control center.
  • the amount of coal to be dried should be kept constant during operation.
  • the interior of the drying drum 4 is largely airtight against the environment. Above all, no atmospheric oxygen can penetrate, since the inert gas circuit 18 to 23 is operated at the sealing points of the drying drum under a corresponding excess pressure.
  • the temperature of the dried coal present at the end of the drying drum 4 is specified as a setpoint and compared in a controller. When the value falls below the setpoint, the shut-off device 25 on the pressure side of the fan 7 is opened, so that the amount of vapors in the inert gas circuit 18 to 23 is increased. If the target value of the temperature of the coal at the outlet of the drying drum 4 is exceeded, the amount of vapors is reduced by the control devices described above.
  • the entry temperature of the hot vapors into the drying drum 4 should be about 450 ° C. If the value falls below this target value, the gas supply to the burner 14 is increased. By introducing more energy, the exhaust gas temperature of the heating circuit 9 rises, so that too the temperature of the inert gas circuit 18 to 23 is raised via the heat exchanger 8. When the setpoint of the temperature of the heating circuit 9 is exceeded at the entrance to the heat exchanger, which is approximately 1,100 ° C., the shut-off device 13 in the heating circuit 9 is opened. As a result, an increased recirculation of the exhaust gases at approximately 300 ° C. is initiated, whereby the exhaust gas temperature in the mixing chamber 17 is reduced to the setpoint.
  • the fan 7 can, for example, be designed such that it has a total pressure difference of 70 mbar at 20 ° C., so that this pressure cannot be exceeded at any point in the inert gas circuit.
  • the vapors or the inert gas circuit are cleaned with the cloth filter dedusting device 6 and the upstream indirect pre-separator and cooler 5.
  • Two control loops are required to protect the filter cloths from over and under temperature. If the predetermined setpoint temperature of, for example, 128 ° C. in the line section 20 is exceeded, the first half of the cooling fans is switched on according to the arrows 24. If the temperature continues to rise and reaches, for example, 132 ° C, all cooling fans are switched on. Nevertheless, if the temperature continues to rise and reaches, for example, 135 ° C., the gas supply in the burner 14 is switched off and the shut-off device 29 in the short-circuit line 27 is opened.
  • the temperature in the inert gas circuit 18 to 23 is lowered with certainty Temperatures depend on the permissible temperature for the filter cloth used. If the specified setpoint temperature of 115 ° C. on the line section 20 is undershot, the shut-off device 28 in the short-circuit line 26 is opened, with the material conveyor 2 being switched off at the same time. As a result, the temperature in the pre-separator and cooler 5 and in the cloth filter dedusting 6 is raised again to such a value that critical conditions with regard to falling below the dew point cannot occur.
  • the dried coal present at the end of the drying drum 4 is conveyed into the intermediate silo 36 via the conveying device 34 and via a bucket elevator 35.
  • the coal which is also dry and separated in the pre-separator 5 and in the cloth filter dedusting device 6, is fed via the conveyor screws 50.
  • the coal is removed from the intermediate silo 36 by means of cellular wheel locks and fed to the weighing device 37.
  • the cellular wheel sluices are switched off and the coal is introduced into the mixer 38.
  • the binder 41 is injected into the mixer 38 by the injection device 41.
  • the mixer opens and the dried coated material, namely the coal, falls into a silo 39 or is used for further use.
  • the partial circuit on the inert gas 43 to 47 protects the further system parts after the drying drum 4 and the heated, dry coal contained in them.
  • the ratio of the inert gas, which is introduced into the inert gas circuit 18 to 23 after the fan 7, in relation to the amount of inert gas of the partial circuit 32 to 47 is achieved by the settings of the shut-off devices 25 and 51.
  • the material conveyor 2 is first stopped. Since the drying drum 4 no longer consumes as much heat, the temperature of the dry coal rises at the outlet of the drying drum. Likewise, the temperature of the inert gas in the line section 19 also rises. Water is now introduced into the drying drum 4 via the control device 31 for water. Even now, atmospheric oxygen is prevented from entering the system. After the mixing of the coal in the mixer 38 has ended, the water supply to the drying drum 4 is switched off and the air supply via the second feed line 32 is made possible by opening the shut-off device 33. The amount of vapors circulating increases further by sucking in air. Exhaust gas is continuously released into the exhaust stack 10 via the opened pressure relief valve 49.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Drying Of Solid Materials (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
EP80107653A 1979-12-11 1980-12-05 Procédé et dispositif de séchage et de réchauffage de charbon humide Expired EP0030376B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2949720 1979-12-11
DE2949720A DE2949720C2 (de) 1979-12-11 1979-12-11 Verfahren und Vorrichtung zum Trocknen und Erhitzen von feuchter Kohle

Publications (3)

Publication Number Publication Date
EP0030376A2 true EP0030376A2 (fr) 1981-06-17
EP0030376A3 EP0030376A3 (en) 1981-08-19
EP0030376B1 EP0030376B1 (fr) 1983-10-05

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EP80107653A Expired EP0030376B1 (fr) 1979-12-11 1980-12-05 Procédé et dispositif de séchage et de réchauffage de charbon humide

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EP (1) EP0030376B1 (fr)
DE (1) DE2949720C2 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047509A3 (en) * 1980-09-05 1982-04-21 Kokereigesellschaft Saar Mbh Process and apparatus for drying or preheating coal or coal mixtures and subsequent coking coal by using non-caking or weakly caking coal and/or carbonaceous materials
EP1964909A2 (fr) 2007-02-28 2008-09-03 Alba AG Dispositif de traitement de déchets ménagers ou de déchets de type ménagers pour la fabrication d'articles combustibles
CN100443840C (zh) * 2006-09-20 2008-12-17 山东天力干燥设备有限公司 高挥发性煤粉回转干燥工艺
LU91451B1 (en) * 2008-06-02 2009-12-03 Wurth Paul Sa Method for producing pulverized coal
CN102042743A (zh) * 2010-12-31 2011-05-04 中国神华能源股份有限公司 一种煤炭低温干燥脱水的方法
CN102564067A (zh) * 2010-12-10 2012-07-11 天华化工机械及自动化研究设计院 回转圆筒干燥机催化剂干燥的方法及其设备
WO2014000861A1 (fr) * 2012-06-25 2014-01-03 Thyssenkrupp Uhde Gmbh Procédé et dispositif pour un préchauffage amélioré de charbon par échange de chaleur avec le gaz de refroidissement d'une installation de refroidissement à sec de coke
CN106871631A (zh) * 2017-04-10 2017-06-20 苏州尚梵斯科技有限公司 一种精煤烘干搅拌设备与方法
US10059885B2 (en) 2008-06-02 2018-08-28 Paul Wurth S.A. Method for producing pulverized coal
CN112728925A (zh) * 2020-12-09 2021-04-30 华电电力科学研究院有限公司 一种大容量循环加热干燥系统及其加热干燥方法

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DE1629117A1 (de) * 1966-06-01 1971-01-21 Weizenin Dresden Veb Verfahren und Einrichtung zur schonenden und beschleunigten Trocknung von insbesondere oxydationsempfindlichen und thermolabilen Substanzen
DE2434827A1 (de) * 1973-08-06 1975-02-27 Waagner Biro Ag Verfahren zur energierueckgewinnung bei gaserzeugungsprozessen
DE2415758A1 (de) * 1974-04-01 1976-02-26 Buettner Schilde Haas Ag Anlage zur kohletrocknung und vorerhitzung
DE2435500A1 (de) * 1974-07-24 1976-02-12 Hugo Dr Ing Schaefer Verfahren zur vorerhitzung von kokskohle unter benutzung von ueberhitztem abhitzedampf, der in einer trockenkokskuehlanlage in besonderer weise erzeugt wird
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DE2659335C2 (de) * 1976-12-29 1985-10-24 Bergwerksverband Gmbh Betrieb einer Kohleerhitzungsanlage
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047509A3 (en) * 1980-09-05 1982-04-21 Kokereigesellschaft Saar Mbh Process and apparatus for drying or preheating coal or coal mixtures and subsequent coking coal by using non-caking or weakly caking coal and/or carbonaceous materials
CN100443840C (zh) * 2006-09-20 2008-12-17 山东天力干燥设备有限公司 高挥发性煤粉回转干燥工艺
EP1964909A2 (fr) 2007-02-28 2008-09-03 Alba AG Dispositif de traitement de déchets ménagers ou de déchets de type ménagers pour la fabrication d'articles combustibles
EP1964909A3 (fr) * 2007-02-28 2009-06-24 Alba AG Dispositif de traitement de déchets ménagers ou de déchets de type ménagers pour la fabrication d'articles combustibles
AU2009253965B2 (en) * 2008-06-02 2014-12-04 Paul Wurth S.A. Method for producing pulverized coal
WO2009147153A1 (fr) * 2008-06-02 2009-12-10 Paul Wurth S.A. Procédé de production de charbon pulvérisé
LU91451B1 (en) * 2008-06-02 2009-12-03 Wurth Paul Sa Method for producing pulverized coal
US10059885B2 (en) 2008-06-02 2018-08-28 Paul Wurth S.A. Method for producing pulverized coal
CN102564067A (zh) * 2010-12-10 2012-07-11 天华化工机械及自动化研究设计院 回转圆筒干燥机催化剂干燥的方法及其设备
CN102042743A (zh) * 2010-12-31 2011-05-04 中国神华能源股份有限公司 一种煤炭低温干燥脱水的方法
WO2014000861A1 (fr) * 2012-06-25 2014-01-03 Thyssenkrupp Uhde Gmbh Procédé et dispositif pour un préchauffage amélioré de charbon par échange de chaleur avec le gaz de refroidissement d'une installation de refroidissement à sec de coke
CN106871631A (zh) * 2017-04-10 2017-06-20 苏州尚梵斯科技有限公司 一种精煤烘干搅拌设备与方法
CN106871631B (zh) * 2017-04-10 2023-12-12 内蒙古东日新能源材料有限公司 一种精煤烘干搅拌设备与方法
CN112728925A (zh) * 2020-12-09 2021-04-30 华电电力科学研究院有限公司 一种大容量循环加热干燥系统及其加热干燥方法

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Publication number Publication date
EP0030376A3 (en) 1981-08-19
EP0030376B1 (fr) 1983-10-05
DE2949720A1 (de) 1981-06-19
DE2949720C2 (de) 1982-08-26

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