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1. WO1998036216 - A CFB STEAM GENERATOR WITH A SUPERHEATER AND A REHEATER

Publication Number WO/1998/036216
Publication Date 20.08.1998
International Application No. PCT/US1998/001371
International Filing Date 26.01.1998
Chapter 2 Demand Filed 09.07.1998
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 10/28 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
28Control devices specially adapted for fluidised bed combustion apparatus
CPC
F22B 31/0084
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
0084with recirculation of separated solids or with cooling of the bed particles outside the combustion bed
F23C 10/28
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
28Control devices specially adapted for fluidised bed, combustion apparatus
F23C 2206/103
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
103Cooling recirculating particles
Applicants
  • COMBUSTION ENGINEERING, INC. [US]/[US] (AllExceptUS)
  • PIERZCHALA, Stephen, A. [--]/[US] (UsOnly)
  • WILHELM, Bruce, W. [--]/[US] (UsOnly)
Inventors
  • PIERZCHALA, Stephen, A.
  • WILHELM, Bruce, W.
Agents
  • FOURNIER, Arthur, E., Jr.
Priority Data
08/801,71414.02.1997US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A CFB STEAM GENERATOR WITH A SUPERHEATER AND A REHEATER
(FR) GENERATEUR DE VAPEUR A LIT FLUIDISE CIRCULANT DOTE D'UN SURCHAUFFEUR ET D'UN RESURCHAUFFEUR
Abstract
(EN)
A method for exercising control over the final predefined superheat outlet steam temperature and for exercising control over the final predefined reheat outlet steam temperature from a circulating fluidized bed steam generator (2) having a furnace volume (4) embodying at least superheat surface, a multichambered backpass volume (12) embodying at least superheat surface (34) within one chamber (12a) of the multichambered backpass volume (12) and at least reheat surface (36) within another one (12b) of the multichambered backpass volume (12), a first circulatory fluid flow path (100a) operative as an evaporative steam loop (40, 42, 4a, 44, 40), and a second circulatory fluid flow path (100b) operative as a superheat steam-reheat steam loop and including a saturated steam segment (46, 12c, 12g, 12e, 12f, 12h, 86), a superheat steam segment (34a, 88, 48, 88', 34, 90, 50, 52, 48a, 52'), a reheat steam segment (36, 54, 60, 62) and an economizer segment (70, 72, 80, 82, 38a, 38b, 84, 40).
(FR)
L'invention concerne un procédé permettant de réguler la température de la vapeur de sortie surchauffée prédéfinie finale et de réguler la température de la vapeur de sortie resurchauffée prédéfinie finale provenant d'un générateur (2) de vapeur à lit fluidisé circulant comportant un volume (4) de four mettant en oeuvre au moins une surface de surchauffe, un volume (12) de retour multichambres mettant en oeuvre au moins une surface de surchauffe (34) à l'intérieur d'une chambre (12a) du volume (12) de retour multichambres ainsi qu'au moins une surface de resurchauffe (36) à l'intérieur d'une autre chambre (12b) du volume (12) de retour multichambres, un premier chemin (100a) d'écoulement de fluide circulant faisant office de boucle de vapeur d'évaporation (40, 42, 4a, 44, 40), ainsi qu'un second chemin (100b) d'écoulement de fluide circulant faisant office de boucle de vapeur de surchauffe-vapeur de resurchauffe et comprenant un segment de vapeur saturée (46, 12c, 12g, 12e, 12f, 12h, 86), un segment de vapeur de surchauffe (34a, 88, 48, 88', 34, 90, 50, 52, 48a, 52'), un segment de vapeur de resurchauffe (36, 54, 60, 62) et un segment économiseur (70, 72, 80, 82, 38a, 38b, 84, 40).
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