WO2007061668A3 - Circulating fluidized bed boiler having improved reactant utilization - Google Patents

Circulating fluidized bed boiler having improved reactant utilization Download PDF

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Publication number
WO2007061668A3
WO2007061668A3 PCT/US2006/044016 US2006044016W WO2007061668A3 WO 2007061668 A3 WO2007061668 A3 WO 2007061668A3 US 2006044016 W US2006044016 W US 2006044016W WO 2007061668 A3 WO2007061668 A3 WO 2007061668A3
Authority
WO
WIPO (PCT)
Prior art keywords
circulating fluidized
fluidized bed
bed boiler
reactant
flue gas
Prior art date
Application number
PCT/US2006/044016
Other languages
French (fr)
Other versions
WO2007061668A2 (en
Inventor
Brian S Higgins
Original Assignee
Mobotec Usa Inc
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 Mobotec Usa Inc filed Critical Mobotec Usa Inc
Priority to EP06827761.5A priority Critical patent/EP1957866A4/en
Priority to CN2006800089911A priority patent/CN101292115B/en
Priority to AU2006316618A priority patent/AU2006316618A1/en
Publication of WO2007061668A2 publication Critical patent/WO2007061668A2/en
Publication of WO2007061668A3 publication Critical patent/WO2007061668A3/en

Links

Classifications

    • 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
    • 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
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J7/00—Arrangement of devices for supplying chemicals to fire
    • 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
    • F23C2206/103—Cooling recirculating particles

Abstract

A circulating fluidized bed boiler having improved reactant utilization. The circulating fluidized bed boiler includes a circulating fluidized bed having a dense bed portion; a lower furnace portion adjacent to the dense bed portion; and an upper furnace portion, wherein the dense bed portion of the circulating fluidized bed boiler is maintained below the stoichiometric ratio (fuel rich stage) and the lower furnace portion is maintained above the stoichiometric ratio (fuel lean stage), thereby reducing the formation of NOx.; a reactant to reduce the emission of at least one combustion product in the flue gas; and a plurality of secondary air injection ports downstream of the circulating fluidized bed for providing mixing of the reactant and the flue gas in the furnace above the dense bed, wherein the amount of reactant required for the reduction of the emission of the combustion product is reduced. In a preferred embodiment, the circulating fluidized bed boiler may further include a return system for returning carry over particles from the flue gas to the circulating fluidized bed.
PCT/US2006/044016 2005-11-17 2006-11-09 Circulating fluidized bed boiler having improved reactant utilization WO2007061668A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP06827761.5A EP1957866A4 (en) 2005-11-17 2006-11-09 Circulating fluidized bed boiler having improved reactant utilization
CN2006800089911A CN101292115B (en) 2005-11-17 2006-11-09 Circulating fluidized bed boiler having improved reactant utilization
AU2006316618A AU2006316618A1 (en) 2005-11-17 2006-11-09 Circulating fluidized bed boiler having improved reactant utilization

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/281,915 2005-11-17
US11/281,915 US7410356B2 (en) 2005-11-17 2005-11-17 Circulating fluidized bed boiler having improved reactant utilization

Publications (2)

Publication Number Publication Date
WO2007061668A2 WO2007061668A2 (en) 2007-05-31
WO2007061668A3 true WO2007061668A3 (en) 2008-01-03

Family

ID=38067721

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/044016 WO2007061668A2 (en) 2005-11-17 2006-11-09 Circulating fluidized bed boiler having improved reactant utilization

Country Status (8)

Country Link
US (2) US7410356B2 (en)
EP (1) EP1957866A4 (en)
KR (1) KR20080084976A (en)
CN (1) CN101292115B (en)
AU (1) AU2006316618A1 (en)
PL (1) PL211124B1 (en)
RU (1) RU2008122212A (en)
WO (1) WO2007061668A2 (en)

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EP1753999B1 (en) * 2004-05-28 2013-11-20 Alstom Technology Ltd Fluid bed device with oxygen-enriched combustion agent
US7938071B2 (en) * 2007-03-13 2011-05-10 Alstom Technology Ltd. Secondary air flow biasing apparatus and method for circulating fluidized bed boiler systems
CN100491824C (en) * 2007-11-02 2009-05-27 清华大学 Low bed pressure-reducing circulated fluid bed boiler combustion process
US8069824B2 (en) * 2008-06-19 2011-12-06 Nalco Mobotec, Inc. Circulating fluidized bed boiler and method of operation
DE102009013713A1 (en) * 2009-03-20 2010-09-23 Mvv Biopower Gmbh Method for operating a biomass cogeneration plant with a fluidized bed combustion
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US20110265697A1 (en) * 2010-04-29 2011-11-03 Foster Wheeler North America Corp. Circulating Fluidized Bed Combustor and a Method of Operating a Circulating Fluidized Bed Combustor
CN102466223B (en) 2010-10-29 2014-08-20 中国科学院工程热物理研究所 Circulating fluidized bed boiler
KR101364068B1 (en) * 2010-12-28 2014-02-20 재단법인 포항산업과학연구원 Fluidized combustion boiler
US9421510B2 (en) * 2013-03-19 2016-08-23 Synthesis Energy Systems, Inc. Gasifier grid cooling safety system and methods
CN104147916A (en) * 2014-07-31 2014-11-19 浙江天蓝环保技术股份有限公司 Fluent-based method for arranging selective non-catalytic reduction (SNCR) spray gun on circulating fluidized bed boiler
FI20155085A (en) * 2015-02-09 2016-08-10 Fortum Oyj Method for reducing NOx emissions in a circulating fluidized bed boiler, circulating fluidized bed boiler and use thereof
ES2761870T3 (en) 2016-08-25 2020-05-21 Doosan Lentjes Gmbh Circulating fluidized bed apparatus
CN112560281B (en) * 2020-12-23 2023-08-01 中国科学院沈阳自动化研究所 Method for separating electrical grade magnesia powder based on Fluent optimized airflow

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Also Published As

Publication number Publication date
US20070119387A1 (en) 2007-05-31
AU2006316618A1 (en) 2007-05-31
US7410356B2 (en) 2008-08-12
PL211124B1 (en) 2012-04-30
EP1957866A2 (en) 2008-08-20
CN101292115B (en) 2010-09-22
EP1957866A4 (en) 2013-09-11
PL384257A1 (en) 2008-07-21
KR20080084976A (en) 2008-09-22
RU2008122212A (en) 2009-12-27
CN101292115A (en) 2008-10-22
US8069825B1 (en) 2011-12-06
WO2007061668A2 (en) 2007-05-31

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