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1. WO1996005469 - FLUIDIZED BED REACTOR AND METHOD OF OPERATION THEREOF

Publication Number WO/1996/005469
Publication Date 22.02.1996
International Application No. PCT/FI1995/000434
International Filing Date 16.08.1995
Chapter 2 Demand Filed 03.03.1996
IPC
F22B 31/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
22STEAM GENERATION
BMETHODS OF STEAM GENERATION; STEAM BOILERS
31Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus
F23C 10/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
23COMBUSTION APPARATUS; COMBUSTION PROCESSES
CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN AIR
10Apparatus in which combustion takes place in a fluidised bed of fuel or other particles
F23C 10/10 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
23COMBUSTION APPARATUS; COMBUSTION PROCESSES
CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN AIR
10Apparatus in which combustion takes place in a fluidised bed of fuel or other particles
02with 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
04the 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
08characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
10the separation apparatus being located outside the combustion chamber
F23C 10/18 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
23COMBUSTION APPARATUS; COMBUSTION PROCESSES
CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN AIR
10Apparatus in which combustion takes place in a fluidised bed of fuel or other particles
18Details; Accessories
CPC
F22B 31/0015
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
22STEAM GENERATION
BMETHODS OF STEAM GENERATION; STEAM BOILERS
31Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
0007with combustion in a fluidized bed
0015for boilers of the water tube type
F23C 10/005
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
23COMBUSTION APPARATUS; COMBUSTION PROCESSES
CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  ; A CARRIER GAS OR; AIR 
10Fluidised bed combustion apparatus
005comprising two or more beds
F23C 10/10
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
23COMBUSTION APPARATUS; COMBUSTION PROCESSES
CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  ; A CARRIER GAS OR; AIR 
10Fluidised bed combustion apparatus
02with 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
04the 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
08characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
10the separation apparatus being located outside the combustion chamber
F23C 10/18
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
23COMBUSTION APPARATUS; COMBUSTION PROCESSES
CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  ; A CARRIER GAS OR; AIR 
10Fluidised bed combustion apparatus
18Details; Accessories
F23C 2206/101
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
23COMBUSTION APPARATUS; COMBUSTION PROCESSES
CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  ; A CARRIER GAS OR; AIR 
2206Fluidised bed combustion
10Circulating fluidised bed
101Entrained or fast fluidised bed
F23J 2900/01002
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
23COMBUSTION APPARATUS; COMBUSTION PROCESSES
JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
2900Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
01002Cooling of ashes from the combustion chamber by indirect heat exchangers
Applicants
  • FOSTER WHEELER ENERGIA OY [FI]/[FI]
Inventors
  • HYPPÄNEN, Timo
Agents
  • BLOMQUIST, Tuula
Priority Data
08/291,46117.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FLUIDIZED BED REACTOR AND METHOD OF OPERATION THEREOF
(FR) REACTEUR A LIT FLUIDISE ET PROCEDE D'UTILISATION
Abstract
(EN)
A fluidized bed reactor system includes a reaction chamber (112) comprising a circulating (fast) bed, with a first grid (114) for the introduction of fluidizing gas, and a bubbling (slow) fluidized bed (116) having a second grid (120) for introduction of fluidizing gas. The second grid is mounted below the first grid. First (122) and second (132) interconnections are provided between the circulating and bubbling beds. Particles flow from the circulating bed through the first interconnection to the bubbling bed, and vice versa for the second connection. The interconnections are positioned with respect to each other so that the pressure and density conditions within the bed are the sole mechanisms that provide the driving force to control the flow of particles from the circulating bed to the bubbling bed. An indirect heat exchanger (128) may be located in the bubbling bed for cooling particles, and various constructions of partitions (130) may be provided for dividing up the bubbling bed and defining the interconnections.
(FR)
Un système de réacteur à lit fluidisé comprend une chambre de réaction (112) ayant un lit rapide circulant avec une première grille (114) pour l'alimentation en gaz de fluidification et un lit fluidisé lent bouillonnant (116) avec une seconde grille (120) pour l'alimentation en gaz de fluidification. La seconde grille est située plus bas que la première grille. Des première (122) et seconde (132) ouvertures sont prévues entre le lit circulant et le lit bouillonnant. Les particules vont du lit circulant au lit bouillonnant par la première ouverture et dans l'autre sens par la seconde ouverture. Les ouvertures sont disposées l'une par rapport à l'autre de manière à ce que les conditions de pression et de densité dans le lit fournissent à elles seules la force nécessaire pour entraîner les particules du lit circulant vers le lit bouillonnant. On peut prévoir un échangeur thermique indirect (128) dans le lit bouillonnant pour refroidir les particules, ainsi que différents systèmes de cloisons (130) pour diviser le lit bouillonnant tout en permettant des communications.
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