EP0084279B1 - Procédé et installation de récupération de chaleur, notamment pour le refroidissement de cendres - Google Patents

Procédé et installation de récupération de chaleur, notamment pour le refroidissement de cendres Download PDF

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Publication number
EP0084279B1
EP0084279B1 EP82402145A EP82402145A EP0084279B1 EP 0084279 B1 EP0084279 B1 EP 0084279B1 EP 82402145 A EP82402145 A EP 82402145A EP 82402145 A EP82402145 A EP 82402145A EP 0084279 B1 EP0084279 B1 EP 0084279B1
Authority
EP
European Patent Office
Prior art keywords
ash
fluidized bed
smoke
gas
finest
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.)
Expired
Application number
EP82402145A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0084279A2 (fr
EP0084279A3 (en
Inventor
Gérard Chrysostome
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.)
Creusot Loire SA
Original Assignee
Creusot Loire SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9264427&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0084279(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Creusot Loire SA filed Critical Creusot Loire SA
Priority to AT82402145T priority Critical patent/ATE19688T1/de
Publication of EP0084279A2 publication Critical patent/EP0084279A2/fr
Publication of EP0084279A3 publication Critical patent/EP0084279A3/fr
Application granted granted Critical
Publication of EP0084279B1 publication Critical patent/EP0084279B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat

Definitions

  • the subject of the invention is a method and an installation for recovering the heat contained in a solid body in divided form, and applies more particularly to the cooling of the ashes of poor fuels.
  • a fluidized bed has the particularity of carrying out itself, during combustion, a separation of the ash produced according to their particle size. Indeed, the finest ashes, for example less than 0.5 mm, are entrained by the ascending gaseous current discharged with the fumes while the ashes of larger particle size, for example between 0.5 and 10 mm remain in the fluidized bed. Moreover, it is necessary to carry out a continuous or discontinuous purge by an outlet placed at the height of the fluidized bed to maintain a substantially constant volume therein.
  • the said ashes are cooled in a fluidized bed with a fluidizing gas
  • the coarsest ashes are cooled in a counter-current cooler with a gas flowing in the opposite direction and the air heated by the coarsest ashes is mixed with the fumes leaving the oven, said fumes and the air heated by the fine ashes being then introduced at two different points in a circuit for using the heat of the gases thus reheated.
  • This process finds a particularly advantageous application in the case of poor fuels which are generally burned in a fluidized bed because this allows stable combustion and is satisfied with coarse grinding, for example between 0 and 10 mm.
  • the installation for implementing the method according to the invention therefore comprises a counter-current cooler for cooling the largest ash by a gas flowing in the opposite direction thereof and a fluidized bed cooler for cooling the finest ash by a fluidizing gas and a circuit for recovering the gas leaving the counter-current cooler opening into a flue gas evacuation pipe, downstream of the separator for mixing said gas with the flue gases before entering in a circuit of use.
  • the appended figure schematically shows, by way of example, such an installation.
  • This comprises a fluidized bed oven consisting of an enclosure 1 provided at its lower part with a grid 11 limiting a chamber 12 for the arrival of fluidizing gas.
  • the fuel supplied by an inlet 13 burns in the fluidized bed formed above the grid 11 and the fumes are evacuated through the chimney 14.
  • An outlet 15 placed at the height of the fluidized bed and produced in a conventional manner makes it possible to carry out a purge by evacuating the largest ashes while the finest ashes escape with the fumes through the chimney 14.
  • the ash leaving through the drain 15 feeds a cooler 2 constituted for example by an inclined rotary drum inside which the ashes descend, against the flow of the cooling gas such as air which is introduced cold at 21, circulates in the opposite direction of the solid materials and leaves at 22 at a temperature of the order of 800 ° C.
  • a cooler 2 constituted for example by an inclined rotary drum inside which the ashes descend, against the flow of the cooling gas such as air which is introduced cold at 21, circulates in the opposite direction of the solid materials and leaves at 22 at a temperature of the order of 800 ° C.
  • the fumes which escape through the chimney 14 at a temperature of approximately 900 ° C. first pass through a static separator 3, for example a cyclone and are directed by a pipe 31 for discharging the gases towards a circuit d use, for example a recovery boiler 4.
  • the finest ash entrained in the chimney 14 by the fumes is therefore collected at the bottom of the separator 3, at a temperature of about 900 ° C. and feeds a cooler adapted to their particle size, for example a fluidized bed 5.
  • the latter is supplied with cold air which is distributed under the grid, passes through it with a low speed and exits at 51 at a temperature of approximately 500 °.
  • the air at 800 ° leaving at 22 from the counter-current cooler 2 is evacuated through a line 23 which opens into the line 31 upstream of the boiler 4 which is thus supplied with the mixture which circulates inside the boiler by cooling for example on water circulation beams for the production of steam.
  • the air at 500 ° leaving at 51 from the cooler 5 can therefore be introduced further downstream in the recovery boiler, in an area where the fumes have already been cooled to a temperature of about 500 °.
  • each of the two coolers operates for the particle size to which it is adapted and the hot gases produced are used under optimal conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Processing Of Solid Wastes (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
EP82402145A 1981-11-27 1982-11-25 Procédé et installation de récupération de chaleur, notamment pour le refroidissement de cendres Expired EP0084279B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82402145T ATE19688T1 (de) 1981-11-27 1982-11-25 Verfahren und einrichtung zur waermerueckgewinnung, insbesondere bei der abkuehlung von asche.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8122228 1981-11-27
FR8122228A FR2517419A1 (fr) 1981-11-27 1981-11-27 Procede et installation de recuperation de chaleur, notamment pour le refroidissement de cendres

Publications (3)

Publication Number Publication Date
EP0084279A2 EP0084279A2 (fr) 1983-07-27
EP0084279A3 EP0084279A3 (en) 1983-08-10
EP0084279B1 true EP0084279B1 (fr) 1986-05-07

Family

ID=9264427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82402145A Expired EP0084279B1 (fr) 1981-11-27 1982-11-25 Procédé et installation de récupération de chaleur, notamment pour le refroidissement de cendres

Country Status (7)

Country Link
US (1) US4471723A (pt)
EP (1) EP0084279B1 (pt)
JP (1) JPS58173312A (pt)
AT (1) ATE19688T1 (pt)
BR (1) BR8206856A (pt)
DE (1) DE3271053D1 (pt)
FR (1) FR2517419A1 (pt)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2723402A (en) * 1950-07-12 1955-11-15 Lloyd V France Propolis culture
JPS61175408A (ja) * 1985-01-31 1986-08-07 Chiyuushiyou Kigyo Shinko Jigyodan 石炭ボイラ燃焼灰の冷却方法
DE3625992A1 (de) * 1986-07-31 1988-02-04 Steinmueller Gmbh L & C Verfahren zum verbrennen von kohlenstoffhaltigen materialien in einer zirkulierenden wirbelschicht und wirbelschichtfeuerungsanlage zur durchfuehrung des verfahrens
SE459987B (sv) * 1987-12-23 1989-08-28 Abb Stal Ab Saett att kyla aska och kraftanlaeggning med en anordning foer askkylning
CN108980820A (zh) * 2018-07-16 2018-12-11 重庆大学 一种循环流化床锅炉底渣余热回收装置
CN110052223A (zh) * 2019-05-20 2019-07-26 陕西金泰氯碱化工有限公司 一种无汞催化合成氯乙烯采用高沸点水溶液移热的装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB317470A (en) * 1928-08-18 1931-01-02 Geza Szikla Improvements in or relating to coal dust furnaces
NL113541C (pt) * 1958-03-24
DE1166402B (de) * 1958-11-04 1964-03-26 Cie Des Metaux D Overpelt Lomm Wirbelbettfeuerung zur Verbrennung geringwertiger Brennstoffe in zwei Verbrennungskammern
GB1032598A (en) * 1963-10-14 1966-06-15 Fuji Photo Film Co Ltd Improvements in or relating to heating apparatus
DE2624302A1 (de) * 1976-05-31 1977-12-22 Metallgesellschaft Ag Verfahren zur durchfuehrung exothermer prozesse
US4159682A (en) * 1977-12-01 1979-07-03 Dorr-Oliver Incorporated Fluid bed combustion with predrying of moist feed using bed sand
US4196676A (en) * 1978-07-21 1980-04-08 Combustion Power Company, Inc. Fluid bed combustion method and apparatus
US4349969A (en) * 1981-09-11 1982-09-21 Foster Wheeler Energy Corporation Fluidized bed reactor utilizing zonal fluidization and anti-mounding pipes
US4355601A (en) * 1981-09-25 1982-10-26 Conoco Inc. Recirculating flue gas fluidized bed heater

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"der Deutsche Babcock Anlagen AG", FIRMENDRUCKSCHRIFT P. NR. 1794E - 11/80 DER DEUTSCHE BABCOCK ANLAGEN AG., November 1980 (1980-11-01)
DEUTSCHE ZEITSCHRIFT ENERGIE 31, 1979, pages 240 - 243

Also Published As

Publication number Publication date
US4471723A (en) 1984-09-18
DE3271053D1 (en) 1986-06-12
FR2517419A1 (fr) 1983-06-03
ATE19688T1 (de) 1986-05-15
FR2517419B3 (pt) 1984-08-24
EP0084279A2 (fr) 1983-07-27
JPS58173312A (ja) 1983-10-12
BR8206856A (pt) 1983-10-04
EP0084279A3 (en) 1983-08-10

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