EP0431163A4 - Composite circulation fluidized bed boiler - Google Patents

Composite circulation fluidized bed boiler

Info

Publication number
EP0431163A4
EP0431163A4 EP19890909857 EP89909857A EP0431163A4 EP 0431163 A4 EP0431163 A4 EP 0431163A4 EP 19890909857 EP19890909857 EP 19890909857 EP 89909857 A EP89909857 A EP 89909857A EP 0431163 A4 EP0431163 A4 EP 0431163A4
Authority
EP
European Patent Office
Prior art keywords
fluidized bed
chamber
heat recovery
fluidization medium
main combustion
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.)
Granted
Application number
EP19890909857
Other versions
EP0431163B1 (en
EP0431163A1 (en
Inventor
Takahiro Ohshita
Shuichi Nagato
Norihisa Miyoshi
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.)
Ebara Corp
Original Assignee
Ebara Corp
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 Ebara Corp filed Critical Ebara Corp
Publication of EP0431163A1 publication Critical patent/EP0431163A1/en
Publication of EP0431163A4 publication Critical patent/EP0431163A4/en
Application granted granted Critical
Publication of EP0431163B1 publication Critical patent/EP0431163B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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 of dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of 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 of 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
    • 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 of dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of 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 of 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
    • F22B31/0092—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of 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 with a fluidized heat exchange bed and a fluidized combustion bed separated by a partition, the bed particles circulating around or through that partition

Abstract

This invention relates to a composite circulation fluidized bed boiler. A fluidized bed portion of the fluidized bed boiler is divided by a partition into a main combustion chamber and a heat recovery chamber, and at least two kinds of air chambers, i.e. an air chamber for providing a large fluidizing speed to a fluidization medium and an air chamber for providing a small fluidizing speed are provided. The combination of air having different fluidization speeds and jetted from these air chambers generates a swirling circulation flow in the fluidization medium inside the main combustion chamber and a circulation flow of the fluidization medium is generated between the main combustion chamber and the heat recovery chamber. Inside the heat recovery chamber, heat recovery of an exhaust gas is made at a free board portion or downstream of the free board portion in an internal circulation fluidized bed boiler for lowering the fluidization medium in the form of the fluidized bed, and after the temperature of the exhaust gas is lowered, the exhaust gas thus cooled is led into a cyclone and the char in a fine particle form collected by the cyclone is returned to the portion immediately above, or into, the lowering moving layer of the fluidization medium in the main combustion chamber and/or the heat recovery chamber. Since the char is returned immediately above or into the lowering moving layer of the fluidization medium, it does not immediately scatter to the free board portion. Accordingly, though it is the fine particles, it sediments and diffuses sufficiently into the fluidized bed so that NOx generated by the combustion of coal or the like inside the layer can be reduced.
EP89909857A 1988-08-31 1989-08-30 Composite circulation fluidized bed boiler Expired - Lifetime EP0431163B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP21513588 1988-08-31
JP215135/88 1988-08-31
PCT/JP1989/000883 WO1990002293A1 (en) 1988-08-31 1989-08-30 Composite circulation fluidized bed boiler

Publications (3)

Publication Number Publication Date
EP0431163A1 EP0431163A1 (en) 1991-06-12
EP0431163A4 true EP0431163A4 (en) 1992-05-20
EP0431163B1 EP0431163B1 (en) 1995-12-06

Family

ID=16667285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89909857A Expired - Lifetime EP0431163B1 (en) 1988-08-31 1989-08-30 Composite circulation fluidized bed boiler

Country Status (9)

Country Link
EP (1) EP0431163B1 (en)
KR (1) KR100229691B1 (en)
CN (1) CN1017469B (en)
AT (1) ATE131271T1 (en)
AU (1) AU4199889A (en)
CA (1) CA1332685C (en)
DE (1) DE68925033T2 (en)
MY (1) MY104683A (en)
WO (1) WO1990002293A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU685766B2 (en) * 1993-03-03 1998-01-29 Ebara Corporation Pressurized internal circulating fluidized-bed boiler
CN100417862C (en) * 2005-12-09 2008-09-10 清华大学 Horizontal circulating fluidized bed burning equipment and its circulating burning method
FI122040B (en) * 2009-11-10 2011-07-29 Foster Wheeler Energia Oy Process and arrangement for feeding fuel into a boiler with circulating fluidized beds
EP2821697B1 (en) * 2012-02-13 2018-12-19 Ebara Environmental Plant Co., Ltd. In-bed heat transfer tube for fluidized bed boiler
JP5992322B2 (en) * 2012-12-28 2016-09-14 住友重機械工業株式会社 Circulating fluidized bed boiler
CN103090397B (en) * 2013-01-16 2015-09-09 河南科技大学 A kind of mud and fluidized bed multifuel combustion reactor
FI126744B (en) 2013-05-14 2017-04-28 Valmet Technologies Oy Arrangement and method of fluidization boiler
CN104279548A (en) * 2013-07-12 2015-01-14 李雨田 Energy-collecting heat exchange environment-friendly boiler
CN105444160B (en) * 2014-08-29 2019-01-08 中国科学院工程热物理研究所 Recirculating fluidized bed fine ash burner
CN106196124A (en) * 2016-08-23 2016-12-07 苏州泰盛新绿节能环保科技有限公司 A kind of coal-burning boiler assembly reducing smoke evacuation oxygen content
CN107631293A (en) * 2017-10-27 2018-01-26 湘潭锅炉有限责任公司 A kind of CFBB
JP7079627B2 (en) * 2018-03-13 2022-06-02 荏原環境プラント株式会社 Fluidized bed heat recovery device
CN114353049A (en) * 2021-12-25 2022-04-15 江苏中科重工股份有限公司 Method and equipment for recycling steam-water heat of boiler drain flash tank

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1081739A (en) * 1963-12-03 1967-08-31 Container Corp Disposal of waste liquors and recovery of inorganic chemicals therefrom
DE2449798A1 (en) * 1974-10-19 1976-04-29 Rheinstahl Ag Turbulent bed incinerator for partially dewatered sludge - secondary combustion air injectors inclined adjustably towards afterburner
GB2046886A (en) * 1979-01-31 1980-11-19 Foster Wheeler Power Prod Fluidized bed fired fluid heaters
EP0124636A1 (en) * 1983-05-10 1984-11-14 GebràœDer Sulzer Aktiengesellschaft Fluidized-bed furnace
GB2151503A (en) * 1981-12-15 1985-07-24 William Benedict Johnson Fluidized bed combustion apparatus and method of carrying out fluidized bed combustion
EP0230309A2 (en) * 1986-01-21 1987-07-29 Ebara Corporation Fluidised bed boiler and method for controlling it

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57139205A (en) * 1981-02-23 1982-08-28 Babcock Hitachi Kk Fluidized bed furnace
JPS62141408A (en) * 1985-12-13 1987-06-24 Mitsubishi Heavy Ind Ltd Circulation type fluidized bed combustor
JPS63143409A (en) * 1986-12-03 1988-06-15 Mitsubishi Heavy Ind Ltd Fluidized bed boiler of circulation type

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1081739A (en) * 1963-12-03 1967-08-31 Container Corp Disposal of waste liquors and recovery of inorganic chemicals therefrom
DE2449798A1 (en) * 1974-10-19 1976-04-29 Rheinstahl Ag Turbulent bed incinerator for partially dewatered sludge - secondary combustion air injectors inclined adjustably towards afterburner
GB2046886A (en) * 1979-01-31 1980-11-19 Foster Wheeler Power Prod Fluidized bed fired fluid heaters
GB2151503A (en) * 1981-12-15 1985-07-24 William Benedict Johnson Fluidized bed combustion apparatus and method of carrying out fluidized bed combustion
EP0124636A1 (en) * 1983-05-10 1984-11-14 GebràœDer Sulzer Aktiengesellschaft Fluidized-bed furnace
EP0230309A2 (en) * 1986-01-21 1987-07-29 Ebara Corporation Fluidised bed boiler and method for controlling it

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
D.L.KEAIRNS ET AL 'Evaluation of the fluidized-bed combustion process, Volume 1' December 1973 , ENVIRONMENTAL PROTECTION AGENCY , WASHINGTON D.C. *

Also Published As

Publication number Publication date
ATE131271T1 (en) 1995-12-15
WO1990002293A1 (en) 1990-03-08
CN1041646A (en) 1990-04-25
MY104683A (en) 1994-05-31
DE68925033T2 (en) 1996-05-15
EP0431163B1 (en) 1995-12-06
KR100229691B1 (en) 1999-11-15
EP0431163A1 (en) 1991-06-12
DE68925033D1 (en) 1996-01-18
CA1332685C (en) 1994-10-25
CN1017469B (en) 1992-07-15
AU4199889A (en) 1990-03-23
KR900700822A (en) 1990-08-17

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