EP0063173A1 - Four à lit fluidisé - Google Patents

Four à lit fluidisé Download PDF

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Publication number
EP0063173A1
EP0063173A1 EP81108394A EP81108394A EP0063173A1 EP 0063173 A1 EP0063173 A1 EP 0063173A1 EP 81108394 A EP81108394 A EP 81108394A EP 81108394 A EP81108394 A EP 81108394A EP 0063173 A1 EP0063173 A1 EP 0063173A1
Authority
EP
European Patent Office
Prior art keywords
air
fluidized bed
funnel
fluidizing
fluidizing tubes
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
EP81108394A
Other languages
German (de)
English (en)
Other versions
EP0063173B1 (fr
Inventor
Horst Ing. Grad. Sauter
Werner Dipl.-Ing. Poersch
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.)
Grenzebach GmbH and Co KG
Original Assignee
Babcock BSH AG
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 Babcock BSH AG filed Critical Babcock BSH AG
Publication of EP0063173A1 publication Critical patent/EP0063173A1/fr
Application granted granted Critical
Publication of EP0063173B1 publication Critical patent/EP0063173B1/fr
Expired legal-status Critical Current

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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
    • F23C10/18—Details; Accessories
    • 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
    • F23C10/18—Details; Accessories
    • F23C10/24—Devices for removal of material from the bed
    • 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 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/99006—Arrangements for starting combustion

Definitions

  • the invention relates to a fluidized bed combustion according to the preamble of patent claim 1.
  • a fluidized bed firing of this type is already known.
  • This is a so-called circulating fluidized bed, in which the inert material is continuously drawn from the fluidized bed in a circuit, cooled in a heat exchanger and returned to the fluidized bed in order to lower the temperature.
  • the heat exchanger can be arranged in the ash funnel according to one embodiment, which is directly under the grate.
  • the invention does not aim to remove heat from the fluidized bed. Rather, the invention is based on the object of cooling the precipitated ash in a simple manner, avoiding excessive heating of the lower furnace parts and using the heat dissipated.
  • the ash funnel is also cooled from the outside using the heat given off in full.
  • a suitable air flow, in which the air intended for cooling the ash is brought to elevated pressure, is specified in claim 4.
  • the integration of the pilot burner in the compact system, as specified in claim 5, ensures that only a small amount of furnace mass is to be heated during ignition, no heat is lost, the heating-up time is as short as possible and the consumption of pilot fuel is as low as possible.
  • the combustion chamber 2 enclosed by fireproof masonry 1 has a loading opening 3 and a flue gas outlet 4. Heat exchangers can be arranged in the combustion chamber 2, which are not part of the invention and are therefore not shown in the drawing for the sake of simplicity.
  • a funnel 6 is arranged under the bottom 5, the upper opening of which is substantially equal to the bottom surface of the combustion chamber 2.
  • the funnel 6 runs out into an ash extraction opening 7.
  • the entire funnel is surrounded by a pressure-tight air box 8.
  • This can be supplied with compressed air via a pipeline 9 by a main fan 10.
  • several parallel, horizontal blow pipes 11 are arranged at approximately half the height, which are provided with openings directed upwards.
  • the blowpipes 11 are connected via a distributor 12 and a pipeline 13 to a pressure-increasing fan 14, which is connected to the inside of the air box 8 via a pipeline 15.
  • the bottom 5 consists of several parallel fluidizing tubes 16, which are equipped with nozzles 17 on the top.
  • the fluidizing tubes 16 are fixedly connected at one end to the wall of the funnel 6 and are slidingly in the vicinity of the other end in order to enable thermal expansion.
  • the right side in the drawing is closed, the left end face is open for air intake.
  • the individual fluidizing tubes 16 are assigned pilot burners 18, which are directed into the open end faces. There is a gap 19 for the air between the pilot burner and the fluidizing tube.
  • the combustion chamber 2 there is a fluidized bed in stationary operation, which consists of a small percentage of fuel and ash in the rest.
  • the ashes are discharged continuously or in batches to the extent that new ashes are generated by the burning out of the fuel supplied.
  • Ash filling is included
  • Cooling air is blown into the blowpipes 11 and cools the ash from about 800 ° C. to about 100 ° C.
  • the cooling air reaches the fluidized bed as preheated combustion air and, together with the air emerging from the nozzles 17, causes the fluidization.
  • the cooling does not require an increase in the total air volume.
  • the amount of air diverted from the total amount of air for cooling is dimensioned so that the loosening speed is not reached at any point in the stationary ash filling.
  • the amount of air flowing through the ash filling is large enough to make it easier for the ash to slide down.
  • the cooling air supplied to the blowpipes 11 is removed from the air box 8.
  • Pressure surges in the air box 8 which are caused by bursting bubbles and subsequent material in the fluidized bed, therefore generate simultaneous pressure surges in the cooling air, which largely compensate for the shocks exerted by the fluidized bed on the ash filling and thus counteract a solidification of the ash filling.
  • the vortex air is also taken from the air box 8. Due to the intensive air flow, the funnel 6 is constantly effectively cooled from the outside and the heat dissipated is fully used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
EP81108394A 1981-04-15 1981-10-16 Four à lit fluidisé Expired EP0063173B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3115236 1981-04-15
DE3115236A DE3115236A1 (de) 1981-04-15 1981-04-15 Wirbelbettfeuerung

Publications (2)

Publication Number Publication Date
EP0063173A1 true EP0063173A1 (fr) 1982-10-27
EP0063173B1 EP0063173B1 (fr) 1984-09-26

Family

ID=6130217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108394A Expired EP0063173B1 (fr) 1981-04-15 1981-10-16 Four à lit fluidisé

Country Status (2)

Country Link
EP (1) EP0063173B1 (fr)
DE (2) DE3115236A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0251247A1 (fr) * 1986-07-03 1988-01-07 ASEA STAL Aktiebolag Centrale électrique avec combustion d'un combustible dans un lit fluidisé
US4852345A (en) * 1987-03-03 1989-08-01 Abb Stal Ab Method of cooling bed material from a fluidized bed and a power plant with cooling means for bed material
US4909163A (en) * 1987-12-23 1990-03-20 Abb Stal Ab Method and a device for cooling ashes in a PFBC power plant
US4944148A (en) * 1987-12-23 1990-07-31 Abb Stal Ab Method and a device for cooling of a PFBC power plant after a gas turbine trip
WO2010057714A2 (fr) * 2008-11-20 2010-05-27 Biomass Heating Solutions Limited Unité à lit fluidisé

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3343480A1 (de) * 1983-12-01 1985-06-13 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren und vorrichtung zum fluidisieren und gleichzeitigen kuehlen von wirbelschichtmaterial in einer wirbelschicht-feuerung
DE3527825A1 (de) * 1985-08-02 1987-02-05 Hoelter Heinz Wirbelschichtfeuerungsanlage mit offenem anstroemboden
AT399379B (de) * 1990-06-25 1995-04-25 Waagner Biro Ag Verbrennungseinrichtung für aschenreiche brennstoffe
RU2488061C2 (ru) * 2010-03-29 2013-07-20 Государственное образовательное учреждение высшего профессионального образования "Воронежский государственный технический университет" Способ теплообмена газовых сред

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2303452A1 (de) * 1972-01-26 1973-08-02 British Petroleum Co Verteilerplatte fuer wirbelschichtoefen
DE2935542A1 (de) * 1978-09-04 1980-03-27 Hamjern As Verfahren zum betreiben einer wirbelschicht-verbrennungsanlage und vorrichtung zur durchfuehrung des verfahrens
GB2032598A (en) * 1978-10-03 1980-05-08 Foster Wheeler Energy Corp Cooling material discharged from fluidized beds
DE2856870A1 (de) * 1978-12-30 1980-07-10 Bergwerksverband Gmbh Wirbelschichtfeuerung fuer zentralheizungskessel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2303452A1 (de) * 1972-01-26 1973-08-02 British Petroleum Co Verteilerplatte fuer wirbelschichtoefen
DE2935542A1 (de) * 1978-09-04 1980-03-27 Hamjern As Verfahren zum betreiben einer wirbelschicht-verbrennungsanlage und vorrichtung zur durchfuehrung des verfahrens
GB2032598A (en) * 1978-10-03 1980-05-08 Foster Wheeler Energy Corp Cooling material discharged from fluidized beds
DE2856870A1 (de) * 1978-12-30 1980-07-10 Bergwerksverband Gmbh Wirbelschichtfeuerung fuer zentralheizungskessel

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0251247A1 (fr) * 1986-07-03 1988-01-07 ASEA STAL Aktiebolag Centrale électrique avec combustion d'un combustible dans un lit fluidisé
US4805405A (en) * 1986-07-03 1989-02-21 Asea Stal Ab Power plant with combustion of a fuel in a fluidized bed
US4852345A (en) * 1987-03-03 1989-08-01 Abb Stal Ab Method of cooling bed material from a fluidized bed and a power plant with cooling means for bed material
US4909163A (en) * 1987-12-23 1990-03-20 Abb Stal Ab Method and a device for cooling ashes in a PFBC power plant
US4944148A (en) * 1987-12-23 1990-07-31 Abb Stal Ab Method and a device for cooling of a PFBC power plant after a gas turbine trip
WO2010057714A2 (fr) * 2008-11-20 2010-05-27 Biomass Heating Solutions Limited Unité à lit fluidisé
WO2010057714A3 (fr) * 2008-11-20 2010-07-22 Biomass Heating Solutions Limited Unité à lit fluidisé
US8819987B2 (en) 2008-11-20 2014-09-02 Biomass Heating Solutions Limited Mushroom production process
US8919289B2 (en) 2008-11-20 2014-12-30 Biomass Heating Solutions Limited Poultry rearing process

Also Published As

Publication number Publication date
DE3166348D1 (en) 1984-10-31
EP0063173B1 (fr) 1984-09-26
DE3115236A1 (de) 1982-11-04

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