EP0237712A1 - Procédé de combustion pour un incinérateur à lit fluidisé - Google Patents

Procédé de combustion pour un incinérateur à lit fluidisé Download PDF

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Publication number
EP0237712A1
EP0237712A1 EP19870100514 EP87100514A EP0237712A1 EP 0237712 A1 EP0237712 A1 EP 0237712A1 EP 19870100514 EP19870100514 EP 19870100514 EP 87100514 A EP87100514 A EP 87100514A EP 0237712 A1 EP0237712 A1 EP 0237712A1
Authority
EP
European Patent Office
Prior art keywords
combustion
fluidized bed
furnace body
refuse
exhaust
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
EP19870100514
Other languages
German (de)
English (en)
Other versions
EP0237712B1 (fr
Inventor
Minoru Narisoko
Satoshi Inoue
Sadahiro Yamada
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.)
IHI Corp
Original Assignee
IHI 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 IHI Corp filed Critical IHI Corp
Publication of EP0237712A1 publication Critical patent/EP0237712A1/fr
Application granted granted Critical
Publication of EP0237712B1 publication Critical patent/EP0237712B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage

Definitions

  • This invention relates to a method of combustion for fluidized bed in­cinerators for disposing of refuse such as municipal wastes. More particularly, it is concerned with a method of stabilizing combustion by recirculating the ex­haust gas.
  • Fluidized bed incinerators are constructed in such a way that the sub­stances such as municipal wastes that are to be incinerated (called “refuse” hereinafter) are incinerated away in a fluidized bed, formed together with a fluidizing medium such as sand (called “fluidizing medium” hereinafter) over the air diffuser which is provided within the fluidized bed incinerator body (called “furnace body” hereinafter), as they are thrown thereonto, both by means of the primary air that is injected from said air diffuser.
  • a fluidizing medium such as sand
  • the free­board part of the furnace body above and over said fluidized bed constitutes a combustion chamber in which to burn the pyrolysis, or the thermal decomposition, gas generated in the fluidized bed in afterburning (called “afterburning cham­ber” hereinafter) with the secondary air introduced thereinto.
  • the exhaust gas that has been generated in the afterburning chamber and in the fluidized bed is discharged out of the furnace body from the furnace top, cleaned up, then re­leased to the atmosphere.
  • the conventional method of combustion for such fluidized bed incinerator is simply to provide the primary and the secondary airs to burn the refuse.
  • properties of refuse as calorific value, water content, and size of lumps are changing from moment to moment, maintenance of stable combustion is difficult.
  • a fluidized bed in which to burn the refuse is formed out of the refuse such as municipal wastes and a fluidizing medium by the primary air ; the pyrolysis gas generated in said combustion is burnt with the secondary air in the upper, or the freeboard, space of the fur­nace body ; the gas generated in said secondary combustion is discharged out of the furnace body as an exhaust ; and a part of said discharged exhaust gas is returned to the furnace body, thus achieving effective control over drying, combustion, and pyrolysis of the refuse.
  • the fluidized bed incinerator 1 is equipped with an air diffuser comprising a plurality of air diffuser tubes 2, whose duty it is both to form a fluidized bed 3 out of the substances to be incinerated a such as municipal wastes (the refuse) and a fluidizing medium b such as sand (the fluid­izing medium) and to burn the refuse therein with the primary air sand air dif­fuser tubes 2 inject thereinto.
  • the air diffuser tubes 2 are positioned in the lower part of the incinerator body (the furnace body) in a plural number and in parallel to each other, each tube having a large number of nozzles from which to blow the primary air in.
  • a primary air charging tube 6 is connected to the air diffuser tubes 2 through a primary air blower 5.
  • the freeboard space of the furnace body above and over the fluidized bed 3 serves as the secondary combus­tion chamber (afterburning chamber) 7 in which to burn the pyrolysis gas gener­ated in the fluidized bed 3.
  • an uptake 9 to lead the exhaust gas discharged out of the afterburning chamber 7 to a stack 8 through a gas cooler 10, a gas clean-up unit 11 such as an electrostatic precip­itator, and an induced draft fan 12 in said order.
  • a secondary air charg­ing tube 14 To the afterburning chamber 7, there is connected a secondary air charg­ing tube 14 through a secondary air blower 13 to supply the secondary air there­into. Also provided to the afterburning chamber 7 are a refuse charging port 15 and a fluidizing medium charging port 20, respectively through which the refuse a and the fluidizing medium b are thrown thereinto.
  • an exhaust returning tube 16 is pro­vided to the uptake 9 at a place downstream to the induced draft fan 12 to be connected to the afterburning chamber 7 through an exhaust circulator fan 17, said exhaust returning tube 16 being equipped with a valve 21 at a place down­stream of the exhaust circulator fan 17.
  • a branch pipe 18 that branches off the exhaust returning tube 16 at a place between the valve 21 and the exhaust circulator fan 17 is connected to the primary air charging tube 6 at a place upstream of the primary air blower 5 so as to supply the exhaust gas to the air diffuser tubes 2.
  • a packed bed 4 made up of the combustion residue c of refuse a and the fluidizing medium b .
  • a screw conveyor 22 to take out the combustion residue c and the fluidizing medium b ; the combustion residue c and the fluidizing medium b taken out of the furnace body thereby are separated from each other by the separator 23, the fluidizing medium b returning into the furnace body through a returning line, then through the charging port 20.
  • the temperature of the fluidized bed 3 is decreased, and the combustion is stabilized more easi­ly. Also, since the flame temperature of the afterburning chamber 7 is controlled by the fed back exhaust, the temperature of the fluidized bed 3 is indirectly controll­ed, aiding stabilization of combustion in the fluidized bed 3.
  • the branch pipe 18 of the exhaust returning tube 16 may be led directly into the fluidized bed 3 as shown in Fig. 2.
  • the exhaust return­ing tube 16 may be connected to the secondary air charging tube 14 at a place upstream of the secondary air blower 13 as shown in Fig. 2.
  • the amount of the exhaust gas to be fed back may be automatically controlled through operating the valve 19 and the valve 21 by measuring the temperature of the fluidized bed 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
EP19870100514 1986-02-05 1987-01-16 Procédé de combustion pour un incinérateur à lit fluidisé Expired EP0237712B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP22002/86 1986-02-05
JP2200286A JPS62182516A (ja) 1986-02-05 1986-02-05 流動床式焼却炉の燃焼方法

Publications (2)

Publication Number Publication Date
EP0237712A1 true EP0237712A1 (fr) 1987-09-23
EP0237712B1 EP0237712B1 (fr) 1990-05-09

Family

ID=12070798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870100514 Expired EP0237712B1 (fr) 1986-02-05 1987-01-16 Procédé de combustion pour un incinérateur à lit fluidisé

Country Status (4)

Country Link
EP (1) EP0237712B1 (fr)
JP (1) JPS62182516A (fr)
CA (1) CA1290988C (fr)
DE (2) DE237712T1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0286845A1 (fr) * 1987-04-15 1988-10-19 Deutsche Babcock Energie- und Umwelttechnik Aktiengesellschaft Procédé de combustion de lignite salin
EP0413104A1 (fr) * 1989-06-16 1991-02-20 Ebara Corporation Procédé pour le réglage de la combustion dans un chauffage
EP0446888A2 (fr) * 1990-03-15 1991-09-18 Osaka Gas Co., Ltd. Système d'incinération-fusion pour l'élimination des ordures municipales
WO2002090829A1 (fr) * 2001-05-09 2002-11-14 Fortum Oyj Procede et arrangement pour la reduction des emissions d'oxyde d'azote en combustion sur lit fluidise
EP1500875A1 (fr) * 2002-05-02 2005-01-26 JFE Engineering Corporation Procede d'exploitation d'un incinerateur de dechets et incinerateur de dechets correspondant
CN105351944A (zh) * 2015-12-10 2016-02-24 重庆三峰卡万塔环境产业有限公司 一种改进的炉排炉垃圾焚烧装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105910115B (zh) * 2016-04-19 2018-12-11 中石化炼化工程（集团）股份有限公司 一种废液焚烧装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2037561A1 (de) * 1970-07-29 1972-02-03 Metallgesellschaft AG, 6000 Frank fürt Schlammverbrennung
DE2410477A1 (de) * 1973-11-21 1975-05-22 Babcock Hitachi Kk Verfahren zur verbrennung von industrieabfall
CH577144A5 (en) * 1974-10-03 1976-06-30 Mustad Stoperi & Mek Verksted Low grade fuel burning fluidised bed - uses fluidisation gas mixture made from primary air and combustion gases
US4295817A (en) * 1978-08-04 1981-10-20 The Energy Equipment Co. Ltd. Method and means for controlling the operation of fluidized bed combustion apparatus
EP0049592A1 (fr) * 1980-10-06 1982-04-14 The Energy Equipment Company Limited Unités de combustion à lit fluidisé

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56162312A (en) * 1980-05-19 1981-12-14 Hitachi Ltd Inhibiting and controlling device for nox of incinerator
JPS6046324A (ja) * 1983-08-24 1985-03-13 Kawasaki Steel Corp 連続焼なまし炉設備

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2037561A1 (de) * 1970-07-29 1972-02-03 Metallgesellschaft AG, 6000 Frank fürt Schlammverbrennung
DE2410477A1 (de) * 1973-11-21 1975-05-22 Babcock Hitachi Kk Verfahren zur verbrennung von industrieabfall
CH577144A5 (en) * 1974-10-03 1976-06-30 Mustad Stoperi & Mek Verksted Low grade fuel burning fluidised bed - uses fluidisation gas mixture made from primary air and combustion gases
US4295817A (en) * 1978-08-04 1981-10-20 The Energy Equipment Co. Ltd. Method and means for controlling the operation of fluidized bed combustion apparatus
EP0049592A1 (fr) * 1980-10-06 1982-04-14 The Energy Equipment Company Limited Unités de combustion à lit fluidisé

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0286845A1 (fr) * 1987-04-15 1988-10-19 Deutsche Babcock Energie- und Umwelttechnik Aktiengesellschaft Procédé de combustion de lignite salin
EP0413104A1 (fr) * 1989-06-16 1991-02-20 Ebara Corporation Procédé pour le réglage de la combustion dans un chauffage
US5044287A (en) * 1989-06-16 1991-09-03 Ebara Corporation Method of controlling combustion in a fluidized bed furnace
EP0446888A2 (fr) * 1990-03-15 1991-09-18 Osaka Gas Co., Ltd. Système d'incinération-fusion pour l'élimination des ordures municipales
EP0446888A3 (en) * 1990-03-15 1992-07-22 Osaka Gas Co., Ltd Incinerating-fusing system for city refuse disposal
WO2002090829A1 (fr) * 2001-05-09 2002-11-14 Fortum Oyj Procede et arrangement pour la reduction des emissions d'oxyde d'azote en combustion sur lit fluidise
EP1500875A1 (fr) * 2002-05-02 2005-01-26 JFE Engineering Corporation Procede d'exploitation d'un incinerateur de dechets et incinerateur de dechets correspondant
EP1500875A4 (fr) * 2002-05-02 2007-07-11 Jfe Eng Corp Procede d'exploitation d'un incinerateur de dechets et incinerateur de dechets correspondant
CN105351944A (zh) * 2015-12-10 2016-02-24 重庆三峰卡万塔环境产业有限公司 一种改进的炉排炉垃圾焚烧装置

Also Published As

Publication number Publication date
DE3762681D1 (de) 1990-06-13
CA1290988C (fr) 1991-10-22
DE237712T1 (de) 1988-02-04
EP0237712B1 (fr) 1990-05-09
JPS62182516A (ja) 1987-08-10

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