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EP0760071B1 - Installation d'incineration a lit fluidise - Google Patents

Installation d'incineration a lit fluidise Download PDF

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Publication number
EP0760071B1
EP0760071B1 EP95919921A EP95919921A EP0760071B1 EP 0760071 B1 EP0760071 B1 EP 0760071B1 EP 95919921 A EP95919921 A EP 95919921A EP 95919921 A EP95919921 A EP 95919921A EP 0760071 B1 EP0760071 B1 EP 0760071B1
Authority
EP
European Patent Office
Prior art keywords
walls
cyclone separator
plant according
finned
combustion plant
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.)
Revoked
Application number
EP95919921A
Other languages
German (de)
English (en)
Other versions
EP0760071A1 (fr
Inventor
Bernd BRÄNDLE
Paul Gilli
Werner HÖLBLINGER
Emmerich Seidelberger
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.)
Austrian Energy and Environment AG and Co KG
Austrian Energy and Environment SGP Waagner Biro GmbH
Original Assignee
Austrian Energy and Environment AG and Co KG
Austrian Energy and Environment SGP Waagner Biro GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3506905&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0760071(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Austrian Energy and Environment AG and Co KG, Austrian Energy and Environment SGP Waagner Biro GmbH filed Critical Austrian Energy and Environment AG and Co KG
Publication of EP0760071A1 publication Critical patent/EP0760071A1/fr
Application granted granted Critical
Publication of EP0760071B1 publication Critical patent/EP0760071B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus with combustion in a fluidized bed
    • F22B31/0084—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus with combustion in a fluidized bed with recirculation of separated solids or with cooling of the bed particles outside the combustion bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
    • F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
    • F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
    • F23C10/10—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2206/00—Fluidised bed combustion
    • F23C2206/10—Circulating fluidised bed
    • F23C2206/101—Entrained or fast fluidised bed

Definitions

  • the invention relates to an incinerator according to the principle of a circulating fluidized bed with one or more cyclone separators for returning the bed material into the combustion chamber formed from fin tube walls, in particular in a standing or self-supporting construction with steam drum and a riser and downpipe system in which the cyclone separator has a vertical axis the outside of a wall of the boiler body as part of the cooling system is formed at least in part from flowed fin walls.
  • DE-A1-3517987 From DE-A1-3517987 it is known to provide such systems with horizontal cyclone separators. This design is susceptible to failure in the partial load range and requires a large height, which is again limited by the pipes used.
  • DE-A1-3640377 discloses the removal of cyclones and the use of separating beams and DE-A1-4101918 the arrangement of the cyclone within the combustion chamber, difficulties being expected due to the heated return of the separated residues and the heating surfaces are poorly used.
  • EP-A2 0481438 discloses a steam generator without a steam drum, which is fired by a circulating fluidized bed. Due to the omission of the steam drum, the combustion chamber can be made higher than in conventional standing steam generators with a steam drum and forms a structural unit with the separating cyclone.
  • the invention has set itself the task of allowing the higher design for steam generators with steam drum, so that the cheaper natural circulation system in operation. can be used for larger fluidized bed firing. In the constructional realization, it is also essential to increase the thermal stresses influence that a quick start is also made possible. It is advantageous here to integrate the downpipes in the supporting structure and to design them as weakly heated heating surfaces, this heating surface being designed as the wall of the separating cyclone opposite the combustion chamber.
  • the invention thus enables the range of application of the natural circulation system to be increased to the greatest combustion chamber heights, the combustion chamber being relieved of the weight of the steam drum and the downpipe system being used as a heating surface.
  • This has the effect that the entire construction formed by pipes is cooled by evaporating water and is thus kept practically at the same temperature, so that a higher approach speed is achieved when starting.
  • the invention is characterized in that the steam drum (9) of the boiler body (2) is arranged on a standpipe (10) or a standpipe group and that the standpipe or standpipe group with the boiler body (2) in the region of the front wall (7) is connected and the front wall (7) of the cyclone separator (1) is designed as part of the downpipe system and is thus integrated into the cooling circuit for the combustion chamber front and rear wall.
  • Essential configurations of the invention are specified in subclaims 2 to 7.
  • FIGS. 1 and 2 show an elevation and Fig. 2 shows a side view of a steam generator with a circulating fluidized bed.
  • Fig. 1 shows a steam generator in a compact design in which the cyclone separator (1) is integrated in the boiler body (2) and is designed as part of the support structure.
  • the purpose of the cyclone separator (1) is formed by fin tube walls which, among other things, form the front wall (7) and the side walls (8).
  • the front wall (7) is advantageously designed as part of the downpipe system and thus serves to supply cooling water to the combustion chamber (6), which essentially represents the riser pipe system of the steam generator.
  • the side walls (8) of the cyclone separator are also integrated in the riser pipe system.
  • the dip tube (11) of the cyclone separator (1) is designed to be fire-proof and is suspended in an annular collecting chamber (12) and, if necessary, held via lines (13) connected to the cooling system.
  • the steam drum (9) of the boiler body (2) is arranged at both ends on a standpipe (10) or on a standpipe group, the standpipes being welded to the front wall or integrated into the front wall (7).
  • the lower part of the cyclone separator (1) is funnel-shaped, with the design as a fin wall, the front wall (7) is first bent in the direction of the combustion chamber and only further down by inclining the Side walls of the final funnel exit is reached.
  • the actual return (5) into the combustion chamber (6) takes place via a siphon or an L-valve or a weir through which the returned bed material is returned to the fluidized bed and is finally swirled together with the fuel, the Fuel burns and the bed material is returned to the bed after being separated from the flue gas stream.
  • a weir can also be installed in the horizontal feed channel of the return, which in the event of flooding enables the return but prevents backflow from the combustion chamber.
  • the flue gas flow is indicated in the drawing by arrows, while the return of the bed material is indicated by dashed arrows.
  • This design enables the cooled design of the cyclone separator (1) and, if necessary, the bed return in fin tube construction in an economical manner.
  • the collectors (4) are arranged as far as possible in the intersection lines of the individual pipe walls (Fig. 2), the connections being made by means of inclined pipe sockets or pipe elbows just before the collector.
  • the fin tube walls are bent out, or in some cases provided with bifurcations, if necessary in order to incorporate difficult-to-cool parts into the circulation.
  • An essential feature of the invention is the rectangular or square design of the cyclone separator, which enables integration into the boiler body (2). With this construction it is possible to arrange several cyclones next to each other. In this case, the side-by-side hopper walls, e.g. B. on fork pieces in the necessary partition (15) between the cyclones.
  • the boiler drum (9) in the extension of the intermediate wall between the cyclone (1) and the combustion chamber (6), the downpipes then forming the front wall (7) and the standpipes (10 ) at the ends of the boiler drum outside of the flue gases, i.e. unheated.
  • Fig. 2 shows a side view of the construction of the return of the circulating fluidized bed.
  • the front wall (7) is part of the downpipe system, which is shown in dashed lines in the lower part and ends in collectors (4), in which the liquid phase from the boiler drum (9) (Fig.1) are collected, with the connections to the downpipe fin wall are arranged obliquely.
  • the collectors (4) then open into the lower funnel (14) with the sloping surfaces in the intermediate level and thus lead to the lowest point of the steam generator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Abstract

Installation d'incinération à lit fluidisé, comprenant un séparateur à cyclone à axe vertical, pour le retour du matériau du lit dans la chambre de combustion, en particulier d'un type de construction stationnaire ou auto-portante, caractérisée en ce que le séparateur à cyclone (1) est réalisé en tant qu'élément du corps de chaudière (2) et se trouve ainsi incorporé à la structure portante, en ce qu'il est prévu des parois tubulaires à ailettes appartenant en partie au réseau de tubes ascendants ou de descente du système de refroidissement, et en ce que le séparateur à cyclone proprement dit est, de préférence, de section rectangulaire ou carrée.

Claims (7)

  1. Installation de combustion selon le principe d'un lit fluidisé en circulation, comprenant un ou plusieurs séparateurs à cyclones pour le recyclage de la matière du lit dans la chambre de combustion formée par des parois tubulaires à ailerons, en particulier sous forme d'une structure verticale ou auto-portante comprenant un tambour à vapeur et un système à conduites montante et descendante, dans laquelle le séparateur à cyclone dont l'axe vertical contre le côté externe d'une paroi du corps de chaudière fait partie du système de refroidissement, est réalisé au moins en partie par des parois à ailerons du type à circulation, caractérisée en ce que le tambour à vapeur (9) du corps de chaudière (2) est disposé sur un tuyau vertical (10) ou sur un groupe de tuyaux verticaux et en ce que le tuyau vertical, respectivement le groupe de tuyaux verticaux est relié au corps de chaudière (2) dans la zone de la paroi avant (7), la paroi avant (7) du séparateur à cyclone (1) étant réalisée comme faisant partie du système à conduite descendante et étant par conséquent intégrée dans le circuit de refroidissement pour la paroi avant et arrière de la chambre de combustion.
  2. Installation de combustion selon la revendication 1, caractérisée en ce que les collecteurs (4) alimentant la paroi à ailerons du séparateur à cyclone (1) sont disposés contre les arêtes coupantes des parois à ailerons et sont reliées aux parois à ailerons via des tubulures inclinées.
  3. Installation de combustion selon la revendication 1, caractérisée en ce que le séparateur à cyclone présente un tube plongeur réfractaire (11) suspendu dans un collecteur (12) et est maintenu de préférence via des conduits (13) servant de guidage à de l'eau/de la vapeur.
  4. Installation de combustion selon la revendication 2, caractérisée en ce que la partie inférieure (3) du séparateur à cyclone (1) en forme d'entonnoir est réalisée de haut en bas, d'abord par une inclinaison de la paroi avant (7) dans une direction, et plus bas par l'inclinaison des parois latérales (8) dans l'autre direction.
  5. Installation de combustion selon la revendication 4, caractérisée en ce qu'un groupe de tubes de la paroi avant (7) est plié en-dehors et en particulier présente une bifurcation pour former les parois latérales internes (8) de l'entonnoir du séparateur à cyclone (1) et éventuellement le circuit de recyclage (5).
  6. Installation de combustion selon la revendication 1, caractérisée en ce que les parois latérales internes (8) du circuit de recyclage (5) forment, en partie par pliage en-dehors et en particulier par bifurcation, au moins une partie de la paroi de séparation menant à la chambre de combustion (6).
  7. Installation de combustion selon la revendication 1, caractérisée en ce que des parties du circuit de recyclage (5), en particulier dans la réalisation en forme de siphon, sont réalisées sous forme de parois à ailerons et de préférence, sont alimentées par des conduites descendantes légèrement chauffées qui alimentent ultérieurement d'autres composants du corps de chaudière (2) avec un mélange eau/vapeur d'eau.
EP95919921A 1994-05-31 1995-05-30 Installation d'incineration a lit fluidise Revoked EP0760071B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT1115/94 1994-05-31
AT0111594A AT402846B (de) 1994-05-31 1994-05-31 Verbrennungsanlage nach dem prinzip einer zirkulierenden wirbelschicht
PCT/AT1995/000110 WO1995033159A1 (fr) 1994-05-31 1995-05-30 Installation d'incineration a lit fluidise

Publications (2)

Publication Number Publication Date
EP0760071A1 EP0760071A1 (fr) 1997-03-05
EP0760071B1 true EP0760071B1 (fr) 1997-10-22

Family

ID=3506905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95919921A Revoked EP0760071B1 (fr) 1994-05-31 1995-05-30 Installation d'incineration a lit fluidise

Country Status (10)

Country Link
EP (1) EP0760071B1 (fr)
AT (1) AT402846B (fr)
AU (1) AU2556595A (fr)
CZ (1) CZ346796A3 (fr)
DE (2) DE19580568T1 (fr)
FI (1) FI964757A7 (fr)
PL (1) PL317424A1 (fr)
SE (1) SE9604407D0 (fr)
SK (1) SK151996A3 (fr)
WO (1) WO1995033159A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015185796A1 (fr) 2014-06-03 2015-12-10 Amec Foster Wheeler Energia Oy Chaudière à lit fluidisé dotée d'une construction de support pour un séparateur de particules
EP3472513B1 (fr) 2016-06-20 2020-02-26 Sumitomo SHI FW Energia Oy Chaudière à support inférieur

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19604565A1 (de) * 1996-02-08 1997-08-14 Abb Patent Gmbh Trennvorrichtung zum Abscheiden von Feststoffpartikeln aus dem Gasstrom einer Wirbelschicht
US7244400B2 (en) * 2003-11-25 2007-07-17 Foster Wheeler Energy Corporation Fluidized bed reactor system having an exhaust gas plenum
CN101968215A (zh) * 2010-11-17 2011-02-09 上海锅炉厂有限公司 一种亚临界循环流化床锅炉的布置结构
EP2457646A1 (fr) * 2010-11-26 2012-05-30 Enefit Outotec Technology Oü Séparateur pour séparer des particules solides d'un mélange de gaz et de vapeur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672918A (en) * 1984-05-25 1987-06-16 A. Ahlstrom Corporation Circulating fluidized bed reactor temperature control
US4665864A (en) * 1986-07-14 1987-05-19 Foster Wheeler Energy Corporation Steam generator and method of operating a steam generator utilizing separate fluid and combined gas flow circuits
DE3640377A1 (de) * 1986-11-26 1988-06-09 Steinmueller Gmbh L & C Verfahren zur verbrennung von kohlenstoffhaltigen materialien in einem wirbelschichtreaktor und vorrichtung zur durchfuehrung des verfahrens
FI88200C (fi) * 1990-01-29 1993-04-13 Tampella Oy Ab Foerbraenningsanlaeggning
FI86964C (fi) * 1990-10-15 1992-11-10 Ahlstroem Oy Reaktor med cirkulerande fluidiserad baedd
US5372096A (en) * 1993-12-29 1994-12-13 Combustion Engineering, Inc. Internal particle collecting cells for circulating fluid bed combustion

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015185796A1 (fr) 2014-06-03 2015-12-10 Amec Foster Wheeler Energia Oy Chaudière à lit fluidisé dotée d'une construction de support pour un séparateur de particules
KR101728273B1 (ko) 2014-06-03 2017-04-18 아멕 포스터 휠러 에너지아 오와이 유동층 보일러
US9964301B2 (en) 2014-06-03 2018-05-08 Sumitomo SHI FW Energia Oy Fluidized bed boiler with a support construction for a particle separator
EP3472513B1 (fr) 2016-06-20 2020-02-26 Sumitomo SHI FW Energia Oy Chaudière à support inférieur
US11499709B2 (en) 2016-06-20 2022-11-15 Sumitomo SHI FW Energia Oy Bottom-supported boiler having a boiler pressure body and a four vertical column support construction

Also Published As

Publication number Publication date
FI964757A0 (fi) 1996-11-29
PL317424A1 (en) 1997-04-14
SE9604407L (sv) 1996-11-29
FI964757L (fi) 1996-12-10
FI964757A7 (fi) 1996-12-10
WO1995033159A1 (fr) 1995-12-07
AU2556595A (en) 1995-12-21
DE19580568T1 (de) 1997-04-17
ATA111594A (de) 1997-01-15
AT402846B (de) 1997-09-25
DE59500868D1 (de) 1997-11-27
SE9604407D0 (sv) 1996-11-29
EP0760071A1 (fr) 1997-03-05
SK151996A3 (en) 1997-10-08
CZ346796A3 (en) 1997-05-14

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