EP0129486B1 - Chaudière compacte à lit fluidisé - Google Patents

Chaudière compacte à lit fluidisé Download PDF

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Publication number
EP0129486B1
EP0129486B1 EP84401294A EP84401294A EP0129486B1 EP 0129486 B1 EP0129486 B1 EP 0129486B1 EP 84401294 A EP84401294 A EP 84401294A EP 84401294 A EP84401294 A EP 84401294A EP 0129486 B1 EP0129486 B1 EP 0129486B1
Authority
EP
European Patent Office
Prior art keywords
fumes
tubes
enclosure
communicates
exchange
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
Application number
EP84401294A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0129486A1 (fr
Inventor
Jacques Dreuilhe
Roger Puff
Jean-Claude Kita
Jean-François Large
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.)
Charbonnages de France CDF
Creusot Loire SA
IFP Energies Nouvelles IFPEN
Original Assignee
Charbonnages de France CDF
Creusot Loire SA
IFP Energies Nouvelles IFPEN
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
Application filed by Charbonnages de France CDF, Creusot Loire SA, IFP Energies Nouvelles IFPEN filed Critical Charbonnages de France CDF
Priority to AT84401294T priority Critical patent/ATE23921T1/de
Publication of EP0129486A1 publication Critical patent/EP0129486A1/fr
Application granted granted Critical
Publication of EP0129486B1 publication Critical patent/EP0129486B1/fr
Expired 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
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/40—Arrangements of partition walls in flues of steam boilers, e.g. built-up from baffles
    • 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
    • F22B31/0015—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 for boilers of the water tube type
    • F22B31/003—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 for boilers of the water tube type with tubes surrounding the bed or with water tube wall partitions
    • F22B31/0038—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 for boilers of the water tube type with tubes surrounding the bed or with water tube wall partitions with tubes in the bed

Definitions

  • the present invention relates to a boiler comprising a fuel combustion chamber with a fluidized bed which communicates with an exchange enclosure containing water tubes heated by combustion fumes and within which is an exchange chamber and dedusting system which is equipped with water tubes and contains a vertical internal partition dividing it into two half-chambers communicating with each other and at their lower part and one of which communicates with the upstream part of the enclosure by an inlet orifice located in the upper part and constrains the flue gases to carry out a descending path and the other of which communicates with the downstream part of the enclosure by an outlet orifice situated in the upper part and constrains the fumes to effect a ascending route.
  • a boiler is known from EP-A-0005965.
  • Fluidized bed boilers include a combustion chamber where the fuel is introduced and suspended, by an ascending stream of combustion air entraining a more or less significant part of ash which it is interesting to recycle to facilitate the adjustment of the bed temperature and / or to ensure perfect combustion.
  • the ash recovery is generally carried out before the exchange beam by convection in order to protect the latter from erosion phenomena. In this case, ash collection is usually ensured by dust removal equipment not integrated into the boiler.
  • the design of these boilers is bulky and leads to the use of relatively long ducts.
  • the present invention aims to provide a fluidized bed boiler with an integrated dedusting system providing a reduction in the size and length of the ducts and a particularly effective dedusting.
  • the inlet orifice is located laterally with respect to the interior partition and faces a perpendicular wall of the chamber so that the fumes enter substantially parallel to said partition and are stopped by said wall so as to change direction and be dusted.
  • the exchange and dedusting chamber includes a hopper at the lower part.
  • the boiler comprises a combustion chamber 1 of the fluidized bed type. It consists of a refractory enclosure 11 which contains the fluidized bed 12 of carbon. This is introduced into the enclosure by a supply mouth 13. The bed is suspended by an ascending air stream which is injected at the bottom of the enclosure by injection nozzles supplied with air. Combustion is initiated by the start-up burner 15.
  • the enclosure is equipped, in the lower part, with a lateral outlet mouth 16 which allows the ash to be removed and, above, a lateral inlet mouth 17 which allows the introduction of recycled ash.
  • the combustion chamber 1 communicates with an exchange enclosure 2 containing water tubes 6 and 7 housed inside an external envelope 21 and heated by the combustion fumes which are channeled towards the outlet 22.
  • the fumes flow successively in an exchange chamber 3 then in an exchange and dedusting chamber 4 then in a terminal exchange chamber 5 which leads to the outlet 22.
  • the exchange chamber 3 which overhangs the fluidized bed forms a chimney lined with vertical tubes 6. These tubes are integrated into walls 31 which are formed by sheets closing the gaps between the tubes. A thermal insulation is interposed between the walls 31 and the casing 21.
  • the tubes 6 are connected at their lower end to a lower supply belt and at their upper end to a vapor release manifold.
  • the tubes of the wall 31 are interrupted on the side of the chamber 4 so as to provide an inlet orifice 46.
  • the exchange and dust removal chamber 4 is delimited by a common wall 31 forming the inlet orifice and by walls 41. Tubes 6 are integrated in the walls 41 made of sheets closing the gaps between the tubes.
  • This chamber contains a vertical interior partition 42 which can be produced by means of water circulation tubes. It divides the chamber into two half-chambers 43 and 44, these two half-chambers communicating at the bottom of the partition by a communication orifice 45.
  • the upstream half-chamber 43 communicates with chamber 3 by the inlet orifice 46 located in the upper part.
  • the downstream half-chamber 44 communicates with the terminal chamber 5 via an outlet orifice 47 located in the upper part.
  • Vertical tubes 6 are integrated in the walls 41 and in the partition 42 which consist of sheets closing the gaps between the tubes.
  • the tubes of the interior partition open out at their ends into a supply manifold and into a clearance manifold.
  • the tubes of the walls open at their ends into a supply manifold and into a release tube.
  • the exchange and dusting chamber has a hopper 48 at the bottom for recovering the ash for recycling to the mouth 17 and / or for evacuating it.
  • the inlet port 46 is located laterally with respect to the internal partition 42 and faces a wall 41 perpendicular so that the fumes enter substantially parallel to the partition and are stopped by said opposite wall 41.
  • the smoke descends in the half-chamber 43 along the partition 42 and passes through the orifice 45 then rises in the half-chamber 44 towards the outlet orifice 47.
  • the table below groups together the capture yields of the dedusting chamber, obtained on a model, as a function of the ash load of the fumes and the height of the partition 42 when the latter is positioned close inlet 46.
  • the terminal chamber 5 contains vertical tubes 6 which are connected to a collecting tank 8 equipped with devices for drying the steam and located at the top and to a tank 9 located at the bottom.
  • the steam collected in the release manifolds is led to the collecting tank 8 which also receives the steam produced by the tubes of the chamber 5-The bundle 7 constitutes a superheater.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Air Supply (AREA)
  • Paper (AREA)
EP84401294A 1983-06-21 1984-06-21 Chaudière compacte à lit fluidisé Expired EP0129486B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84401294T ATE23921T1 (de) 1983-06-21 1984-06-21 Kompaktkessel mit wirbelschicht.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8310233 1983-06-21
FR8310233A FR2547899B1 (fr) 1983-06-21 1983-06-21 Chaudiere compacte a lit fluidise

Publications (2)

Publication Number Publication Date
EP0129486A1 EP0129486A1 (fr) 1984-12-27
EP0129486B1 true EP0129486B1 (fr) 1986-11-26

Family

ID=9289999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401294A Expired EP0129486B1 (fr) 1983-06-21 1984-06-21 Chaudière compacte à lit fluidisé

Country Status (12)

Country Link
US (1) US4542716A (enrdf_load_stackoverflow)
EP (1) EP0129486B1 (enrdf_load_stackoverflow)
JP (1) JPS6069406A (enrdf_load_stackoverflow)
AT (1) ATE23921T1 (enrdf_load_stackoverflow)
AU (1) AU570475B2 (enrdf_load_stackoverflow)
BR (1) BR8402991A (enrdf_load_stackoverflow)
CA (1) CA1251105A (enrdf_load_stackoverflow)
DE (1) DE3461501D1 (enrdf_load_stackoverflow)
ES (1) ES533588A0 (enrdf_load_stackoverflow)
FR (1) FR2547899B1 (enrdf_load_stackoverflow)
IN (1) IN160527B (enrdf_load_stackoverflow)
ZA (1) ZA844659B (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI842464A7 (fi) * 1984-06-19 1985-12-20 Rauma Repola Oy Witermo Leijukerrospolttolaite soodakattilaan.
DE3525676A1 (de) * 1985-07-18 1987-01-22 Kraftwerk Union Ag Dampferzeuger
EP0428115B1 (en) * 1989-11-13 1996-02-21 Mitsubishi Jukogyo Kabushiki Kaisha Pressure fluidized bed firing boiler
US5193490A (en) * 1991-09-03 1993-03-16 The Babcock & Wilcox Company Cyclonic mixing and combustion chamber for circulating fluidized bed boilers
JP2835895B2 (ja) * 1992-04-17 1998-12-14 株式会社荏原製作所 分割型流動床水管ボイラ
US6279513B1 (en) * 2000-03-09 2001-08-28 Michael J. Virr Conversion fluid bed chamber assembly
CN101725966B (zh) * 2008-11-26 2011-10-05 王森 一种物料分离与传热于一体循环流化床锅炉
CN102705800A (zh) * 2012-06-25 2012-10-03 卢瑞琳 一种立式低碳节能反烧炉

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR66946E (fr) * 1954-09-17 1957-10-31 Basf Ag Procédé pour la combustion de matières carbonées et la récupération de la chaleur de combustion
US3101697A (en) * 1956-05-07 1963-08-27 Combustion Eng Steam generation
US3893426A (en) * 1974-03-25 1975-07-08 Foster Wheeler Corp Heat exchanger utilizing adjoining fluidized beds
US4165717A (en) * 1975-09-05 1979-08-28 Metallgesellschaft Aktiengesellschaft Process for burning carbonaceous materials
US4184455A (en) * 1978-04-10 1980-01-22 Foster Wheeler Energy Corporation Fluidized bed heat exchanger utilizing angularly extending heat exchange tubes
GB1604998A (en) * 1978-05-31 1981-12-16 Deborah Fluidised Combustion Disposal of waste products by combustion
GB1604999A (en) * 1978-05-31 1981-12-16 Deborah Fluidised Combustion Boilers
US4442795A (en) * 1982-04-26 1984-04-17 Electrodyne Research Corporation Recirculating fluidized bed combustion system for a steam generator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
POWER, vol. 126, no. 8, août 1982, Concord, New Hampshire (US); J. MAKANSI et al.: "Fluidized-bed boilers", pages S1-S16. *

Also Published As

Publication number Publication date
EP0129486A1 (fr) 1984-12-27
BR8402991A (pt) 1985-05-28
AU2957584A (en) 1985-01-03
US4542716A (en) 1985-09-24
DE3461501D1 (en) 1987-01-15
ATE23921T1 (de) 1986-12-15
AU570475B2 (en) 1988-03-17
ES8505466A1 (es) 1985-05-16
ZA844659B (en) 1985-02-27
FR2547899B1 (fr) 1987-08-28
IN160527B (enrdf_load_stackoverflow) 1987-07-18
JPS6069406A (ja) 1985-04-20
CA1251105A (fr) 1989-03-14
ES533588A0 (es) 1985-05-16
FR2547899A1 (fr) 1984-12-28

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