EP0237712A1 - Procédé de combustion pour un incinérateur à lit fluidisé - Google Patents
Procédé de combustion pour un incinérateur à lit fluidisé Download PDFInfo
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000000197 pyrolysis Methods 0.000 claims abstract description 12
- 239000004576 sand Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 238000001035 drying Methods 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 26
- 238000007600 charging Methods 0.000 description 7
- 230000003247 decreasing effect Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2200286A JPS62182516A (ja) | 1986-02-05 | 1986-02-05 | 流動床式焼却炉の燃焼方法 |
JP22002/86 | 1986-02-05 |
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)
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)
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)
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)
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 |
-
1986
- 1986-02-05 JP JP2200286A patent/JPS62182516A/ja active Pending
-
1987
- 1987-01-16 DE DE1987100514 patent/DE237712T1/de active Pending
- 1987-01-16 EP EP19870100514 patent/EP0237712B1/fr not_active Expired
- 1987-01-16 DE DE8787100514T patent/DE3762681D1/de not_active Expired - Fee Related
- 1987-02-04 CA CA000528960A patent/CA1290988C/fr not_active Expired - Fee Related
Patent Citations (5)
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)
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 |
---|---|
JPS62182516A (ja) | 1987-08-10 |
DE237712T1 (de) | 1988-02-04 |
EP0237712B1 (fr) | 1990-05-09 |
CA1290988C (fr) | 1991-10-22 |
DE3762681D1 (de) | 1990-06-13 |
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