EP2908078A1 - Procédé et installation de traitement thermique d'un matériau - Google Patents

Procédé et installation de traitement thermique d'un matériau Download PDF

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Publication number
EP2908078A1
EP2908078A1 EP15000163.4A EP15000163A EP2908078A1 EP 2908078 A1 EP2908078 A1 EP 2908078A1 EP 15000163 A EP15000163 A EP 15000163A EP 2908078 A1 EP2908078 A1 EP 2908078A1
Authority
EP
European Patent Office
Prior art keywords
drum
space
heating
furnace
wall
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
EP15000163.4A
Other languages
German (de)
English (en)
Other versions
EP2908078B1 (fr
Inventor
Carolina Acuna Caro
Uwe Neumann
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.)
Eisenmann SE
Original Assignee
Eisenmann SE
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Filing date
Publication date
Application filed by Eisenmann SE filed Critical Eisenmann SE
Publication of EP2908078A1 publication Critical patent/EP2908078A1/fr
Application granted granted Critical
Publication of EP2908078B1 publication Critical patent/EP2908078B1/fr
Active legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/08—Rotary-drum furnaces, i.e. horizontal or slightly inclined externally heated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/10—Rotary-drum furnaces, i.e. horizontal or slightly inclined internally heated, e.g. by means of passages in the wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/14—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/34—Arrangements of heating devices

Definitions

  • the invention relates to a method for the thermal treatment of a material, in particular foundry sand or roadside material, in a rotary kiln with a rotatable kiln drum whose drum wall defines a heated drum space through which the material is conveyed from a drum inlet to a drum outlet of the kiln drum.
  • the coming of the gas burner fuel gas must have a relatively high temperature in a DC operation, especially in the beginning of the rotary kiln, since the regenerated foundry sand must have a temperature of more than 700 ° C when leaving the rotary kiln. Since the drum atmosphere cools down in the conveying direction or flow direction, adequate starting temperature must be provided accordingly at the beginning. However, this leads in particular in the initial region of the furnace drum to high demands on the temperature resistance of the furnace material, which also leads to high costs.
  • a uniform temperature profile in the furnace drum can be achieved by the combination of direct heating of the drum space, as is known, for example, using a gas burner, with indirect heating of the drum space via its drum wall.
  • direct heating of the drum space as is known, for example, using a gas burner
  • indirect heating of the drum space via its drum wall in particular, a cooling of the flue gases on the way through the kiln drum can be prevented.
  • the temperature at the direct heater compared to a direct heating alone can be reduced, whereby the requirements for the furnace material are less high.
  • the rotary kiln By the heating gas is passed at the drum inlet of the furnace drum in the drum space, the rotary kiln can be operated based on direct heating on the DC principle.
  • the drum wall is heated by a heating medium is passed from the outside to the drum wall.
  • the heating medium is conducted in a direction from the drum outlet on the drum inlet of the furnace drum outside of the drum wall along. Based on the conveying direction of the material through the furnace drum, the indirect heating thus takes place according to the countercurrent principle.
  • the kiln drum in its longitudinal direction be heated with opposite temperature gradient, so that a total of a homogeneous temperature profile is constructed in the drum room.
  • the maximum temperature prevailing locally in the drum space in particular in the area of direct heating, can be lowered.
  • an oven drum is used, of which at least the drum wall and / or a conveying structure on the inner lateral surface of the drum wall are made of steel.
  • the steel used is selected depending on the temperatures reached in the drum room.
  • the direct heating device comprises a burner unit, which is arranged at the drum inlet of the furnace drum is, so that heating gas is conducted there in the drum space, established techniques for a direct firing of the drum space can be used.
  • the indirect heating device comprises a burner unit, by means of which a heating medium can be generated, and at least one line through which the heating medium can be conducted to the drum wall from the outside.
  • a heating medium can be generated, and at least one line through which the heating medium can be conducted to the drum wall from the outside.
  • the indirect heater comprises a flow path through which the heating medium in the direction of the drum outlet on the drum inlet of the furnace drum outside the drum wall is guided along.
  • the flow path for the heating medium can advantageously be provided by the indirect heating device comprising a cladding tube with an inlet connection for heating medium and an outlet connection for heating medium, which is arranged coaxially with the oven drum such that an annular space surrounding the oven drum is formed, by which heating medium indirect heating device is conductive.
  • a helical guide structure is arranged in the annular space so that the heating medium flows in a helical manner from the inlet connection to the outlet connection and around the oven drum. In this way it can be ensured that all areas of the furnace drum are uniformly and selectively overflowed by heating medium.
  • At least the drum wall and / or a conveying structure on the inner lateral surface of the drum wall can be made of steel from the furnace drum.
  • FIG. 1 10 generally designates a system shown schematically for the thermal treatment of a material.
  • the material to be processed can be, for example, foundry sand or even road-breaking material.
  • the system 10 has a rotary kiln 12, which initially based FIG. 2 is explained, which shows the rotary kiln in more detail, but also only schematically.
  • the rotary kiln 12 comprises a furnace drum 14, which is rotatably mounted about pivot bearings 16 about its longitudinal axis 18 is driven by means of a motor 20.
  • the furnace drum 14 has a drum space 22, which is delimited by a drum wall 24 and is open at a front-side drum inlet 26 and a drum exit 28 opposite thereto.
  • the furnace drum 14 opens into an inlet flange 30, which carries a feed pipe 32, can be introduced through the drum inlet 26 into the furnace drum 14 through the material to be processed.
  • the supply nozzle 32 is illustrated as a dashed arrow.
  • a burner unit 34 in the form of a gas burner 36 is arranged on the input flange 30, which has a Fuel gas line 38 is supplied with fuel gas from a not specifically shown fuel gas source. Via an air line 40 the gas burner 36 is supplied for its operation required burner air.
  • the gas burner 36 generates in a manner known per se and heating gas, which is passed in a direction indicated by an arrow heating gas flow direction 42 in the drum chamber 22, flows through it and heated directly.
  • the furnace drum 14 opens at the drum outlet 28 into an outlet flange 44, which comprises a flue gas outlet 46 and a material outlet 48.
  • a flue gas outlet 46 and a material outlet 48.
  • resulting flue gas flows from the drum chamber 22 into the output flange 44 and from there via the flue gas outlet 46 in a flue gas duct 50; This will be discussed again below.
  • the drum wall 24 On its inner circumferential surface, the drum wall 24 carries a conveyor structure 52, for example a continuous conveyor coil 54.
  • a conveyor structure 52 for example a continuous conveyor coil 54.
  • material entering the drum space 22 through the supply nozzle 32 is conveyed therethrough in a conveying direction 56 by the conveyor coil 54
  • Material outlet 28 of the furnace drum 14 promoted where it enters the output flange 44 and is discharged through the material outlet 48.
  • the conveyor coil 54 may still include parallel to the longitudinal axis 18 extending and radially inwardly projecting sheets, which are not shown here specifically. These sheets take the material with the rotation of the kiln drum 14 initially up with, until the material drops again when reaching a certain height from the sheets down. This is compared to a conveyor coil 18 without such additional sheets achieved an even better mixing of the material.
  • the rotary kiln 12 is consequently operated in the so-called DC process.
  • FIG. 1 shows the flue gas is guided from the output flange 44 via the flue gas line 50 in a dust removal device 58. From there, the now dedusted flue gas passes into an adjustable distribution unit 60, by means of which a portion of the purified flue gas is directed into the air line 40 to the gas burner 36 and the remaining portion of the purified flue gas can be removed via a line 62.
  • the distribution unit 60 can also fresh air from a fresh air line 64 are passed with a fresh air blower 66 in the air line 40, so that the ratio of a mixture of purified flue gas and fresh air can be adjusted, which then passes as combustion air to the gas burner 36.
  • the combustion air can thus be provided by pure purified flue gas, pure fresh air or by a mixture of flue gas and fresh air in an adjustable ratio.
  • the burner unit 34 with the associated components is an exemplary embodiment of a first, direct heating device 68, by means of which the drum space 22 can be heated directly by generating a heating gas and can be conducted into the drum space 22.
  • This heater 68 is part of a generally designated 70 heating system, by means of which the drum chamber 22 is heated.
  • this includes Heating system 70 still one in FIG. 1 illustrated second, indirect heating device 72, by means of which the drum space 22 is indirectly heated by the drum wall 24 is at least partially heated.
  • the indirect heating device generates a heating medium.
  • the indirect heating device 72 in the present embodiment comprises a second burner unit 74 in the form of a second gas burner 76, which is supplied via a fuel gas line 78 with fuel gas from a fuel gas source not specifically shown. Via an air line 80 the burner gas required for the operation of the second gas burner 76 is supplied.
  • the heating medium of the indirect heater 72 is also a heating gas.
  • This heating gas is passed via a Walkergas Gustav 82 to the drum wall 24 of the furnace drum 14, where it can flow along the outside.
  • the furnace drum 14 is surrounded by an annular space 84, which is formed by that a cladding tube 86 is arranged coaxially with the furnace drum 14.
  • the cladding tube 86 includes an input port 88 and an output port 90 for heating medium so that the annulus 84 provides a flow path to the fuel gas of the second gas burner 76.
  • the input port 88 is disposed at the end of the cladding tube 86, which faces toward the output flange 44 of the rotary kiln 12.
  • the output port 90 is located at the end of the cladding tube 86 facing toward its input flange 30.
  • the input port 88 is connected to the Schugas effet 82 of the second gas burner 76, so that the fuel gas generated by this in a counter-flow direction 92 outside the drum wall 24 can be conducted, which points from the drum outlet 26 to the drum inlet 28 of the furnace drum 14.
  • the indirect heating device 72 Based on the conveying direction 56 of the material to be processed and the flow direction 42 of the heating gas of the first gas burner 36 through the drum space 22, the indirect heating device 72 thus follows the countercurrent principle.
  • the output port 90 of the cladding tube 86 is connected to a return line 94 with a blower 96, which leads at the other end to a second adjustable distributor unit 98, which in FIG. 1 is shown and to which the heating gas of the second gas burner 76 passes after flowing through the annular space 84.
  • the second distributor unit 98 can supply the fresh air from a fresh air line 102 with a fresh air blower 104 to the air line 80, so that an adjustable mixture of used heating gas from the annular space 84 and fresh air passes through the air line 80 as combustion air to the second gas burner 76.
  • a helical guide structure 108 is disposed in the annular space 84, so that the heating gas of the helically Input terminal 88 to the output port 90 and flows around the furnace drum 14 around. From the conductive structure 108 are in FIG. 2 sections lying behind the plane of the drawing are only partially indicated by dashed lines.
  • At least the drum wall 22 and / or the conveyor spiral 54 of the furnace drum 14 are made of steel.
  • the rotary kiln 12 may be formed as a solid steel welded construction.
  • the operating temperature in the kiln drum 14 can be uniformly maintained at a moderate temperature. As a result, the volume flow of the flue gases produced remains relatively small, whereby their flow rate is lower.
  • the temperature in the drum space 22, the conveying speed and the associated residence time of the material in the drum space 22 as well as the excess of oxygen can also be easily adapted to the material to be processed be matched by the direct and indirect heaters 68 and 72 of the heating system 70.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
EP15000163.4A 2014-01-30 2015-01-21 Procédé et installation de traitement thermique d'un matériau Active EP2908078B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014001257.3A DE102014001257A1 (de) 2014-01-30 2014-01-30 Verfahren und Anlage zum thermischen Aufbereiten eines Materials

Publications (2)

Publication Number Publication Date
EP2908078A1 true EP2908078A1 (fr) 2015-08-19
EP2908078B1 EP2908078B1 (fr) 2018-08-29

Family

ID=52391787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15000163.4A Active EP2908078B1 (fr) 2014-01-30 2015-01-21 Procédé et installation de traitement thermique d'un matériau

Country Status (3)

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US (1) US10161680B2 (fr)
EP (1) EP2908078B1 (fr)
DE (1) DE102014001257A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021023567A1 (fr) * 2019-08-02 2021-02-11 Thyssenkrupp Industrial Solutions Ag Traitement thermique de matières minérales dans une atmosphère réductrice à l'aide de carburants alternatifs

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Publication number Priority date Publication date Assignee Title
KR102019466B1 (ko) * 2013-01-28 2019-09-06 주식회사 엘지화학 압출기를 이용한 연속공정으로 균일한 크기의 구형 구조가 막 전체에 고르게 형성된 중공사막을 제조하는 방법
KR101785141B1 (ko) 2014-08-13 2017-10-13 롯데첨단소재(주) 횡축 회전식 연속 고상중합 장치
DE102015013455A1 (de) 2015-10-16 2017-04-20 Eisenmann Se Lanze für eine Anlage zum thermischen Behandeln eines Gutes und Anlage zum thermischen Behandeln eines Gutes
FI128118B (fi) * 2017-10-25 2019-10-15 Finn Recycling Oy Hiekan terminen elvytys tai puhdistus
CN108613544A (zh) * 2018-05-29 2018-10-02 广西锰华新能源科技发展有限公司 化工还原金属回转设备
DE102018116358A1 (de) * 2018-07-05 2020-01-09 Eisenmann Se Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
CN110145933A (zh) * 2019-06-20 2019-08-20 山东齐盛机电工程有限公司 一种内外热组合式回转窑及其使用方法
CN110328327B (zh) * 2019-08-08 2020-08-28 江苏鹏飞集团股份有限公司 热载体加热法再生铸造旧砂装置
KR102224937B1 (ko) * 2019-10-10 2021-03-05 정진호 금속 스크랩 재활용 장치
DE102020123078A1 (de) 2020-09-03 2022-03-03 Pakexa AG Verfahren zum Aufbereiten von bitumen- und/oder teerhaltigen Feststoffen
EP4317879A1 (fr) * 2022-08-04 2024-02-07 Nippon Gases Euro-Holding, S.L.U. Procédé et four rotatif de séparation des métaux non ferreux et de la ferraille

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DE4218628A1 (de) * 1991-09-13 1993-03-18 Zweckverband Sondermuellentsor Verfahren und vorrichtung zum im wesentlichen abgas- und geruchsfreien betreiben von drehrohrtrommeln zur behandlung von thermischen prozessen
JPH0875129A (ja) * 1994-09-05 1996-03-19 Hitachi Chem Co Ltd 焙焼炉
US6228143B1 (en) * 2000-01-18 2001-05-08 The International Metals Reclamation Company, Inc. Rotary thermal oxidizer for battery recycling and process
JP2005009712A (ja) * 2003-06-17 2005-01-13 Takasago Ind Co Ltd ロータリキルン及びその操業方法
EP2813583A1 (fr) * 2012-02-10 2014-12-17 Tetsugen Corporation Procédé et dispositif de production de fer réduit
CN102840587B (zh) * 2012-09-03 2015-03-04 林秀梅 回转窑内外热复合式直接热回收方法及其系统

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494928A (en) * 1982-07-31 1985-01-22 Rohrbach Technologie Kg Method and apparatus for producing expanded clay and expanded shale
DE4218628A1 (de) * 1991-09-13 1993-03-18 Zweckverband Sondermuellentsor Verfahren und vorrichtung zum im wesentlichen abgas- und geruchsfreien betreiben von drehrohrtrommeln zur behandlung von thermischen prozessen
JPH0875129A (ja) * 1994-09-05 1996-03-19 Hitachi Chem Co Ltd 焙焼炉
US6228143B1 (en) * 2000-01-18 2001-05-08 The International Metals Reclamation Company, Inc. Rotary thermal oxidizer for battery recycling and process
JP2005009712A (ja) * 2003-06-17 2005-01-13 Takasago Ind Co Ltd ロータリキルン及びその操業方法
EP2813583A1 (fr) * 2012-02-10 2014-12-17 Tetsugen Corporation Procédé et dispositif de production de fer réduit
CN102840587B (zh) * 2012-09-03 2015-03-04 林秀梅 回转窑内外热复合式直接热回收方法及其系统

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021023567A1 (fr) * 2019-08-02 2021-02-11 Thyssenkrupp Industrial Solutions Ag Traitement thermique de matières minérales dans une atmosphère réductrice à l'aide de carburants alternatifs

Also Published As

Publication number Publication date
DE102014001257A1 (de) 2015-08-13
EP2908078B1 (fr) 2018-08-29
US20150211794A1 (en) 2015-07-30
US10161680B2 (en) 2018-12-25

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