EP0626988B1 - Procede et dispositif de chauffage d'un tambour de distillation lente - Google Patents

Procede et dispositif de chauffage d'un tambour de distillation lente Download PDF

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Publication number
EP0626988B1
EP0626988B1 EP93903164A EP93903164A EP0626988B1 EP 0626988 B1 EP0626988 B1 EP 0626988B1 EP 93903164 A EP93903164 A EP 93903164A EP 93903164 A EP93903164 A EP 93903164A EP 0626988 B1 EP0626988 B1 EP 0626988B1
Authority
EP
European Patent Office
Prior art keywords
gas
heating gas
low temperature
heating
temperature carbonization
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 - Lifetime
Application number
EP93903164A
Other languages
German (de)
English (en)
Other versions
EP0626988A1 (fr
Inventor
Herbert Tratz
Reiner Engelhardt
Georg Lösel
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.)
Takuma Co Ltd
Mitsui Engineering and Shipbuilding Co Ltd
Original Assignee
Siemens AG
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
Priority claimed from DE19924204728 external-priority patent/DE4204728A1/de
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0626988A1 publication Critical patent/EP0626988A1/fr
Application granted granted Critical
Publication of EP0626988B1 publication Critical patent/EP0626988B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B21/00—Heating of coke ovens with combustible gases
    • 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
    • C10B1/00—Retorts
    • C10B1/10—Rotary retorts
    • 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
    • C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
    • C10B47/28—Other processes
    • C10B47/30—Other processes in rotary ovens or retorts
    • 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
    • C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form

Definitions

  • the invention relates to a method for heating a smoldering drum according to the preamble of claim 1.
  • the invention further relates to a device for carrying out the method and also to a smoldering and firing system operating according to this method.
  • the charring of waste at a low temperature is an endothermic process.
  • the heat required for the reaction is fed indirectly to the waste via heat exchanger heating surfaces which are arranged in the form of tubes in the wall of a rotating drum or smoldering drum.
  • a heating gas is fed to the smoldering drum, which is conducted in a heating gas circuit.
  • the heating gas circuit in a smoldering-firing system operating according to this method comprises a heat exchanger which is arranged on a combustion chamber of the firing system and absorbs thermal energy from the hot flue gas there.
  • the carbonization system is practically always operated together with the combustion system, the carbonization gas generated being burned in the combustion system to produce steam.
  • An independently heatable smoldering system is known from DE-OS 30 18 572.
  • a partial stream of the smoldering gas generated is burned in a combustion chamber.
  • the resulting flue gas is used as heating gas for the smoldering drum and is released into the environment after flowing through a heat exchanger.
  • a self-sufficient smoldering system is also from the publication "Pyrolysis of waste” by Karl J. Thomé-Kozmiensky, EF-Verlag für Energy- undmaschinetechnik GmbH, 1985, pages 97 to 120, especially picture 2 on page 101 and text on page 103.
  • the entire carbonization gas generated is converted into a clean gas in a gas converter with a downstream scrubber. Part of this clean gas is burned in a combustion chamber. The resulting flue gas is conducted in an essentially open circuit and used as heating gas for the smoldering drum.
  • this process is particularly complex and uneconomical, especially since an already economically usable clean gas is used to generate heating gas.
  • the invention is therefore based on the object of specifying an economical method for heating a smoldering drum, with the heating gas always being used to introduce a sufficient amount of heat into the smoldering drum. This is to be achieved with a largely simplified device that ensures the provision of a heating gas required for the autonomous operation of the carbonization system.
  • a controllable partial stream of the heating gas flowing out of the carbonization drum and thus cooled is returned to the carbonization drum in a closed partial circuit and mixed with the hot heating gas again.
  • the partial flow of the carbonization gas is expediently dedusted before the combustion, there is the possibility that dust will be deposited in the heating gas circuit, in particular in the carbonization drum, during operation of the carbonization system.
  • the amount of dust deposited can be reduced by reducing the partial flow of the carbonization gas to be burned.
  • this leads to a reduction in the amount of heat introduced into the smoldering drum with the heating gas.
  • the cooled heating gas flowing out of the carbonization drum is first preheated.
  • the preheated heating gas is then fed back to the carbonization drum together with the burned partial stream of the carbonization gas.
  • a partial flow of the heating gas flowing out of the smoldering drum is branched off from the heating gas circuit before or after preheating.
  • the partial flow of the carbonization gas is expediently carried out in the presence of negative pressure in the heating gas circuit. This measure serves on the one hand to promote the partial flow of the carbonization gas and the heating gas generated in the heating gas circuit. On the other hand, escape of carbonization gas or heating gas into the environment in the event of a leak is avoided.
  • the cooled heating gas is advantageously preheated by indirect heat exchange with steam.
  • the cooled heating gas is expediently dedusted before preheating.
  • a partial stream, preferably 20 to 50%, of the carbonization gas generated can be fed to a first combustion chamber for generating the heating gas for the carbonization drum.
  • the residual stream of the carbonization gas generated can be fed to a second combustion chamber of the combustion system for steam generation.
  • Steam generated in the combustion system is fed to a heat exchanger connected upstream in the heating gas circuit of the first combustion chamber.
  • the advantages achieved by the invention are, in particular, that by using a partial stream of the carbonization gas to generate the heating gas required for the carbonization, the carbonization system can be operated in a particularly economical manner.
  • This carbonization system can therefore be used to retrofit an existing combustion or firing system, the excess carbonization gas and the residual material from the smoldering drum can be burned.
  • no heat and mass transport with the cross connections required for example, in the prior art according to EP-OS 0 340 537 between the existing combustion plant and the supplied or retrofitted smoldering plant for heating them are required.
  • FIG. 1 shows a schematic representation of a smoldering-firing plant with a device for generating hot gas with a heat exchanger connected to two hot spots in a hot gas circuit.
  • the smoldering plant shown comprises a smoldering plant 1 with a downstream combustion plant 2.
  • the smoldering plant 1 comprises a smoldering drum 4 with a feed device 6 for waste a and a discharge chamber 8 for separating the smoldering gas s produced from the outgassed residue r.
  • heating pipes 10 are arranged which are charged with a heating gas g.
  • An inflow line 12 and an outflow line 14 are connected to the carbonization drum 4.
  • the inflow line 12 is connected to a mixing chamber 16, which is preceded by a combustion chamber 18.
  • a blower or suction draft 20 is located in the outflow line 14.
  • a first branch 22 of the outflow line 14 is connected to the mixing chamber 16.
  • a second branch 24 of the discharge line 14 is connected to the combustion chamber 18.
  • the discharge chamber 8 is connected via a line 26 to a device 28 for dust separation, for example a cyclone.
  • the device 28 is connected to the combustion chamber 18 via a line 30.
  • An outlet 27 of the device 28 is connected via a line 32 to a combustion chamber 34 of the combustion system 2.
  • the combustion chamber 34 is followed by a waste heat boiler or flue gas cooler 36 with heating surfaces 38.
  • a device 42 for flue gas cleaning and a further fan or a suction 44 are connected in a flue gas line 40.
  • the flue gas line 40 opens into a chimney (not shown).
  • the outflow line 14 of the smoldering drum 4 opens into the flue gas line 40 via a valve 46 in the area between the waste heat boiler 36 and the cleaning device 42.
  • a parallel branch 43 with a valve 45 ends in the waste heat boiler 36 in the area between adjacent heating surfaces 38.
  • the flue gas line 40 is over a line 47 and valves 48 and 50 are connected to branch 22 and branch 24 of outflow line 14, respectively.
  • the smoldering drum 4 is fed the waste a via a conveyor 52.
  • the waste a is pyrolyzed or carbonized in the smoldering drum 4 by the pipes 10 heated by hot flue gas or heating gas g.
  • the resulting carbonization gas s and the outgassed residual material r are separated from one another in the discharge chamber 8.
  • the residue r is fed to further processing via a discharge opening 54. He can e.g. be burned in the combustion chamber 34.
  • the carbonization gas s is roughly cleaned by means of a sieve or filter 55 by separating fibers and large pieces and then sucked into the device 28 via the line 26.
  • the carbonization gas s contains several% by weight of fine dust with a larger proportion of combustible material.
  • the carbonization gas s enters the device 28 at the top tangentially via an inlet opening 56, which is designed in the form of a relatively high narrow slot (not shown in any more detail). Due to the centrifugal force, dust particles become inside when deflected the device 28 pressed against the wall. As a result, dust is reduced in the center.
  • a low-dust partial stream t 1 of 20 to 50%, preferably 30%, of the carbonization gas s is removed from the device 28 via a suction pipe 62 extending far beyond the inlet opening 56 and fed to the combustion chamber 18 for combustion.
  • the dust content of the partial stream t1 of the carbonization gas s can be further reduced.
  • Longitudinal slots in the suction pipe 62 have a positive influence on the dust separation, because the entry speed is thereby reduced and made more uniform.
  • the partial stream t1 of the dedusted or dust-depleted carbonization gas s is used for heating gas generation.
  • the partial stream t1 of the carbonization gas s is burned in the combustion chamber 18 at a temperature T1 of approximately 1250 ° C.
  • the outflowing from the smoldering drum 4 and cooled to a temperature T2 'of about 250 ° C heating gas g is first preheated to a temperature T2 "of about 360 ° C in a heat exchanger 80 connected to the discharge side of the blower 20 in the outflow line 14 Then an adjustable partial flow t3 of the preheated heating gas g is fed via the branch 22 into the mixing chamber 16.
  • a partial flow t4 of the preheated heating gas g that can be adjusted by means of the valve 25 can be fed directly to the combustion chamber 18. At least part of the heating gas g thus flows via the mixing chamber 16 and the inflow line 12 as well as through the heating pipes 10 and the heat exchanger 80 and above the branches 22, 24 of the outflow line 14 in a closed pitch circle 70.
  • the outlet opening 27 of the device 28 for the main or residual stream t2 of the carbonization gas s is also tangential in the lower region of the device 28.
  • the dust concentrated towards the wall reaches the residual stream t2 via the line 32 to the combustion chamber 34.
  • the direction of rotation of the flow is of the carbonization gas s after entering the device 28 and before leaving the device 28 the same.
  • the bottom area 60 of the device 28 is raised conically or parabolically towards the center, so that no dust deposits can form there.
  • the hot flue gas resulting from the combustion of the residual current t2 of the carbonization gas s in the combustion chamber 34 is used in the waste heat boiler 36 to generate steam.
  • the transport of this residual stream t2 of the carbonization gas s from the carbonization drum 4 via the device 28 and the combustion chamber 30 as well as via the waste heat boiler 36 and the cleaning system 42 takes place via the suction fan 44.
  • the heating gas g not required for the heating gas generation flows in an open circuit 72 via the valve 46 and is mixed with the flue gas flowing out of the combustion chamber 34 in front of the cleaning device 42. In the cleaning device 42, therefore, only completely burned flue gas is cleaned.
  • Steam from the waste heat boiler 36 serves as the heat transfer medium for the heat exchanger 80.
  • the steam is removed from the heating surfaces 38 at point A and fed to the heat exchanger 80 at an inlet temperature of approximately 390 ° C.
  • the cooled steam exiting the heat exchanger 80 at point B flows back to the heating surfaces 38 at a temperature of approximately 330 ° C.
  • a dust separator 82 is arranged on the suction side of the blower 20 in the outflow line 14.
  • the heating gas g is led out of the carbonization drum 4 in the circuit 72 and is mixed with the flue gas via the valve 49 upstream and via the valve 46 downstream of the waste heat boiler 36. In this case, the gas mixture is cleaned solely in the device 42.
  • the heating gas circuit 72 is now closed via the line 47 and the valves 48 and 50, the heat exchanger 80 ′ then being located in the line 47. In this case, clean flue gas is removed from the pressure side of the fan 44 and preheated in the heat exchanger 80 ′ arranged in the line 47. The preheated flue gas is then mixed into the heating gas g again.
  • the independently operated smoldering system 1 is particularly advantageously suitable for retrofitting an existing combustion system 2. For this purpose, essentially only a connection has to be made via the line 32.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Air Supply (AREA)
  • Coke Industry (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Drying Of Solid Materials (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Claims (13)

  1. Procédé pour chauffer un tambour de distillation à basse température pour obtenir un gaz de distillation (s) à basse température, dans lequel on utilise un gaz de chauffage (g) passant dans un circuit (70,72) de gaz de chauffage, ce gaz étant produit par combustion d'un courant (t₁) partiel du gaz (g) de distillation à basse température, caractérisé en ce qu'il consiste à renvoyer un courant (t₃, t₄) partiel dont on peut se rendre maître du gaz de chauffage (g) refroidi au tambour (4) de distillation et ainsi le remélanger au gaz de chauffage (g), le gaz refroidi sortant du tambour (4) de distillation étant d'abord préchauffé.
  2. Procédé selon la revendication 1, caractérisé en ce qu'il consiste à faire passer le courant (t₁) partiel de gaz de distillation (s) sous la dépression régnant dans le circuit (70, 72) du gaz de chauffage.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'il consiste à dépoussiérer le courant (t₁) partiel du gaz de distillation (s) avant la combustion.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'il consiste à effectuer le préchauffage du gaz de chauffage (g) refroidi par échange thermique indirect avec de la vapeur.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce qu'il consiste à dépoussiérer le gaz de chauffage (g) refroidi avant le préchauffage.
  6. Dispositif de chauffage d'un tambour (4) de distillation à basse température, qui est monté dans un circuit (70, 72) de gaz de chauffage par un conduit (12) d'entrée et un conduit (14) de sortie, le circuit (70, 72) de gaz de chauffage comportant une chambre (18) de combustion pour la production du gaz de chauffage (g) et un courant (t₁) partiel du gaz de distillation (s) produit dans le tambour (4) de distillation pouvant être envoyé à la chambre (18) de combustion,
    caractérisé par un échangeur (80,80') de chaleur branché en amont de la chambre (18) de combustion dans le circuit (70, 72) de gaz de chauffage et destiné à préchauffer le gaz de chauffage (g) refroidi.
  7. Dispositif suivant la revendication 6, caractérisé en ce qu'un dispositif (28) de dépoussiérage, de préférence un cyclone, est monté en amont de la chambre (18) de combustion.
  8. Dispositif suivant la revendication 6 ou 7, caractérisé en ce qu'un ventilateur (20) aspirant est monté dans le conduit (14) de sortie du circuit (70,72) de gaz de chauffage.
  9. Dispositif suivant la revendication 8, caractérisé en ce que le côté de refoulement du ventilateur (20) aspirant communique avec la chambre (18) de combustion.
  10. Dispositif suivant la revendication 8 ou 9, caractérisé en ce que le côté de refoulement du ventilateur (20) aspirant communique avec une chambre (16) de mélange montée en aval de la chambre (18) de combustion.
  11. Dispositif suivant l'une des revendications 6 à 10, caractérisé par un dispositif (82) de dépoussiérage, monté en aval de l'échangeur (80, 80') de chaleur dans le conduit (14) de sortie.
  12. Installation de combustion et de distillation à basse température comportant un dispositif suivant l'une des revendications 6 à 11, dans laquelle le courant (t₂) restant du gaz de distillation (s) produit est envoyé à une chambre (34) de l'installation (2) de combustion.
  13. Installation de combustion et de distillation comportant un dispositif suivant l'une des revendications 6 à 11, dans laquelle la vapeur produite dans l'installation (2) de combustion peut être envoyée à l'échangeur (80, 80') de chaleur.
EP93903164A 1992-02-17 1993-02-11 Procede et dispositif de chauffage d'un tambour de distillation lente Expired - Lifetime EP0626988B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19924204728 DE4204728A1 (de) 1992-02-17 1992-02-17 Verfahren und einrichtung zum beheizen einer schweltrommel
DE4204728 1992-02-17
DE4217301A DE4217301A1 (de) 1992-02-17 1992-05-25 Verfahren und Einrichtung zum Beheizen einer Schweltrommel
DE4217301 1992-05-25
PCT/DE1993/000119 WO1993016147A1 (fr) 1992-02-17 1993-02-11 Procede et dispositif de chauffage d'un tambour de distillation lente

Publications (2)

Publication Number Publication Date
EP0626988A1 EP0626988A1 (fr) 1994-12-07
EP0626988B1 true EP0626988B1 (fr) 1996-04-24

Family

ID=25911934

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93903164A Expired - Lifetime EP0626988B1 (fr) 1992-02-17 1993-02-11 Procede et dispositif de chauffage d'un tambour de distillation lente

Country Status (9)

Country Link
EP (1) EP0626988B1 (fr)
JP (1) JP3299967B2 (fr)
KR (1) KR100234226B1 (fr)
CN (1) CN1038942C (fr)
AT (1) ATE137257T1 (fr)
CZ (1) CZ282500B6 (fr)
DE (2) DE4217301A1 (fr)
ES (1) ES2086926T3 (fr)
WO (1) WO1993016147A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005001569A1 (de) * 2005-01-13 2006-07-27 Strohmenger, Patrick, Dipl.-Ing. Anlage zur Verschwelung eines Pyrolseguts
DE202007016421U1 (de) 2006-11-22 2009-04-02 Morschett, Peter Anlage zur Behandlung und Aufbereitung von Abfallstoffen aus Verbundmaterialien, insbesondere Verbundkartons (Tetrapacks)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0815393B1 (fr) * 1995-03-21 1999-01-07 Metallgesellschaft Aktiengesellschaft Procede de traitement d'ordures menageres
DE19512785A1 (de) * 1995-04-05 1996-10-17 Siemens Ag Verfahren zur thermischen Behandlung von Abfallstoffen
FR2734343A1 (fr) * 1995-05-16 1996-11-22 Ostan Raffaele Four rotatif de pyrolyse des dechets
CN104315524B (zh) * 2014-09-11 2016-06-29 中复神鹰碳纤维有限责任公司 一种碳纤维低温碳化废气处理系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2244753B1 (de) * 1972-09-08 1973-10-18 Mannesmann Ag, 4000 Duesseldorf Verfahren und Vorrichtung zur Ver mchtung von Mull
DE3018572C2 (de) * 1980-05-14 1983-07-21 Deutsche Kommunal-Anlagen Miete GmbH, 8000 München Indirekt beheizter Drehrohrofen für die Pyrolyse von Abfallstoffen, bei dem die Pyrolysegase zur Verbrennung dem Brenner des Drehrohrofens zugeführt werden
DE3815187A1 (de) * 1988-05-04 1989-11-16 Siemens Ag Temperaturgeregelte anlage zur thermischen abfallentsorgung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005001569A1 (de) * 2005-01-13 2006-07-27 Strohmenger, Patrick, Dipl.-Ing. Anlage zur Verschwelung eines Pyrolseguts
DE102005001569B4 (de) * 2005-01-13 2008-11-13 Strohmenger, Patrick, Dipl.-Ing. Anlage zur Verschwelung eines Pyrolyseguts
DE202007016421U1 (de) 2006-11-22 2009-04-02 Morschett, Peter Anlage zur Behandlung und Aufbereitung von Abfallstoffen aus Verbundmaterialien, insbesondere Verbundkartons (Tetrapacks)

Also Published As

Publication number Publication date
ES2086926T3 (es) 1996-07-01
ATE137257T1 (de) 1996-05-15
JPH07503743A (ja) 1995-04-20
DE4217301A1 (de) 1993-12-02
KR950700378A (ko) 1995-01-16
EP0626988A1 (fr) 1994-12-07
JP3299967B2 (ja) 2002-07-08
WO1993016147A1 (fr) 1993-08-19
KR100234226B1 (ko) 1999-12-15
CN1076472A (zh) 1993-09-22
CN1038942C (zh) 1998-07-01
CZ195594A3 (en) 1994-12-15
DE59302381D1 (de) 1996-05-30
CZ282500B6 (cs) 1997-07-16

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