EP0319722A1 - Chambre de combustion pour foyer à lit fluidisé stationnaire atmosphérique - Google Patents

Chambre de combustion pour foyer à lit fluidisé stationnaire atmosphérique Download PDF

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Publication number
EP0319722A1
EP0319722A1 EP19880118597 EP88118597A EP0319722A1 EP 0319722 A1 EP0319722 A1 EP 0319722A1 EP 19880118597 EP19880118597 EP 19880118597 EP 88118597 A EP88118597 A EP 88118597A EP 0319722 A1 EP0319722 A1 EP 0319722A1
Authority
EP
European Patent Office
Prior art keywords
fluidized bed
bed
area
air
fluidized
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.)
Withdrawn
Application number
EP19880118597
Other languages
German (de)
English (en)
Inventor
Udo Dr. Becher
Gerhard Bäckler
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.)
DEUTSCHE KOHLE MARKETING GMBH STEINKOHLEVERTRIEB-W
Original Assignee
Deutsche Kohle Marketing Steinkohlevertrieb-Warmeversorgung GmbH
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
Priority claimed from DE19873741705 external-priority patent/DE3741705A1/de
Application filed by Deutsche Kohle Marketing Steinkohlevertrieb-Warmeversorgung GmbH filed Critical Deutsche Kohle Marketing Steinkohlevertrieb-Warmeversorgung GmbH
Publication of EP0319722A1 publication Critical patent/EP0319722A1/fr
Withdrawn legal-status Critical Current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
    • F23C10/002—Fluidised bed combustion apparatus for pulverulent solid fuel
    • 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
    • F22B31/0046—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 for boilers of the shell type, e.g. with furnace box
    • F22B31/0053—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 for boilers of the shell type, e.g. with furnace box with auxiliary water tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 

Definitions

  • the invention relates to a combustion chamber for atmospheric stationary fluidized bed combustion according to the preamble of claim 1.
  • the invention has for its object to develop the invention according to the German patent application P 36 23 177.0. According to the invention this is achieved with the features of claims 1 and 2.
  • the atmospheric fluidized bed according to patent application P 36 23 177.0 has a water-cooled nozzle bottom below a cylindrical water jacket. Hot gas for heating the bed material of the fluidized bed to the ignition temperature of the fuel or the first air reaches the antler-like lower air nozzles via a first air box arranged directly under the water-cooled nozzle bottom.
  • the step air is controlled via a step air box located under the primary air box into antler-like upper air nozzles.
  • the air nozzles are height-adjustable via an adjustment device with a common linkage. For example, the fuel is separated into a coarse and a fine fraction in a sieving device.
  • the coarse parts are placed on the fluidized bed from above, while the fine-grained fuels are conveyed into the area of the plane between the first air nozzles and the stage air nozzles.
  • the coarse particles have a particularly long time in bed. When sinking in bed, the particles gasify and then burn to a fine grain size. After that, the particles stay in bed and do not fall through.
  • the air grading and fluidization of the fluidized bed can be targeted depending on the fuel to be used in the sense of delayed combustion with the effect of reduced Nitrogen oxide formation can be optimized.
  • the conical extension has an angle of 30 degrees to the vertical.
  • the immersion heating surfaces protrude into the expanded fluidized bed. These heating surfaces begin at the end of the expansion and are arranged in such a way that the output of the heat generator can be changed within a limited range with a slight variation in the bed height, the height adjustment of the stepped air nozzles being important.
  • Material discharged from the fluidized bed is separated from the flue gas flow in the not bricked-up free space of 1.3 m in height up to a certain grain size and reaches the level between the first air nozzles and the step air nozzles with the help of the injector nozzle via the filling shaft and the inlet opening the fluidized bed.
  • the flue gas emerges from the combustion chamber in the upper area of the free space after it has passed the separator and can be further cooled, for example, in secondary heating surfaces.
  • the nozzle base is conical at a certain angle of 15 to 45 degrees to the horizontal, here 30 degrees.
  • the air nozzles are antler-shaped, so that with an evenly narrow distribution of e.g.
  • the nozzles have 6 holes of 4 mm in diameter, each antler has 4 branches.
  • the number of nozzle branches per m2 results from the number of nozzle outlet openings per m2 and the number of holes per branch.
  • the number of antlers results from the number of nozzle branches and the number per antler.
  • the fluidized bed shown in the drawing differs from the fluidized bed described above in that a step air ring 15 is arranged in the upper region of the fluidized fluidized bed.
  • the stepped air ring 15 is adjustable in height.
  • the stepped air ring is divided into several chambers.
  • a separate supply pipe 17 is provided for each air chamber.
  • a valve 18 for metering air is arranged in each supply pipe 17.
  • the fluidized bed according to the invention differs from the previously described fluidized bed system by an entry point for the coal instead of different entry points and by lower air nozzles 3 instead of upper and lower air nozzles.
  • the immersion heating tubes denoted by 8 in the exemplary embodiment have an exit angle of approximately 7 degrees to the horizontal. The angle of inclination can vary between 5 and 8 degrees.
  • the immersion heating surfaces 8 are returned to the inner wall of the boiler with the same inclination in the bed area.
  • a guide or holder 16 for the height-adjustable stepped air ring 15 is provided on the immersion heating tubes 8.
  • the nozzles 3 have nozzle openings of 3 to 4 mm and are directed downwards at an angle of 30 to 50 degrees.
  • the expansion of the fluidized bed is formed by interrupting the lining in the area of the immersion heating tube 8. There, bed material is deposited, which forms a very advantageous transition from the thicker brick lining (smaller bed diameter) to the thinner brick lining (larger bed diameter). This creates an annular gap between the lower lining and the upper lining.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
EP19880118597 1987-12-09 1988-11-09 Chambre de combustion pour foyer à lit fluidisé stationnaire atmosphérique Withdrawn EP0319722A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3741705 1987-12-09
DE19873741705 DE3741705A1 (de) 1986-07-10 1987-12-09 Brennkammer fuer atmosphaerische stationaere wirbelschichtfeuerung

Publications (1)

Publication Number Publication Date
EP0319722A1 true EP0319722A1 (fr) 1989-06-14

Family

ID=6342200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880118597 Withdrawn EP0319722A1 (fr) 1987-12-09 1988-11-09 Chambre de combustion pour foyer à lit fluidisé stationnaire atmosphérique

Country Status (3)

Country Link
EP (1) EP0319722A1 (fr)
CS (1) CS810188A3 (fr)
DD (1) DD283673A5 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5197583A (en) * 1990-10-11 1993-03-30 Toyoda Koki Kabushiki Kaisha Torque transmission device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4392814A (en) * 1979-06-08 1983-07-12 Can-Eng Holdings Limited Fluidized bed
EP0147275A2 (fr) * 1983-12-02 1985-07-03 CHARBONNAGES DE FRANCE, Etablissement public dit: Foyer de combustion pour chaudière à lit fluidisé
EP0157901A2 (fr) * 1984-04-11 1985-10-16 GebràœDer Sulzer Aktiengesellschaft Four à couche fluidisée
US4610851A (en) * 1984-11-28 1986-09-09 Colvert James H Air distributor for FCCU catalyst regenerator
DE3623177A1 (de) * 1986-06-23 1988-01-07 Ruhrkohle Waerme Gmbh Brennkammer fuer atmosphaerische stationaere wirbelschichtfeuerung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4392814A (en) * 1979-06-08 1983-07-12 Can-Eng Holdings Limited Fluidized bed
EP0147275A2 (fr) * 1983-12-02 1985-07-03 CHARBONNAGES DE FRANCE, Etablissement public dit: Foyer de combustion pour chaudière à lit fluidisé
EP0157901A2 (fr) * 1984-04-11 1985-10-16 GebràœDer Sulzer Aktiengesellschaft Four à couche fluidisée
US4610851A (en) * 1984-11-28 1986-09-09 Colvert James H Air distributor for FCCU catalyst regenerator
DE3623177A1 (de) * 1986-06-23 1988-01-07 Ruhrkohle Waerme Gmbh Brennkammer fuer atmosphaerische stationaere wirbelschichtfeuerung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5197583A (en) * 1990-10-11 1993-03-30 Toyoda Koki Kabushiki Kaisha Torque transmission device

Also Published As

Publication number Publication date
CS810188A3 (en) 1992-02-19
DD283673A5 (de) 1990-10-17

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Effective date: 19911127