EP0475029A2 - Foyer à lit fluidisé avec un lit stationnaire - Google Patents

Foyer à lit fluidisé avec un lit stationnaire Download PDF

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Publication number
EP0475029A2
EP0475029A2 EP91112289A EP91112289A EP0475029A2 EP 0475029 A2 EP0475029 A2 EP 0475029A2 EP 91112289 A EP91112289 A EP 91112289A EP 91112289 A EP91112289 A EP 91112289A EP 0475029 A2 EP0475029 A2 EP 0475029A2
Authority
EP
European Patent Office
Prior art keywords
fluidized bed
boiler
air
flue gas
line
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Withdrawn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
EP91112289A
Other languages
German (de)
English (en)
Other versions
EP0475029A3 (en
Inventor
Karl Heinz Maintok
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 Babcock Werke Energie und Umwelttechnik AG
Original Assignee
Deutsche Babcock Werke Energie und Umwelttechnik 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 Deutsche Babcock Werke Energie und Umwelttechnik AG filed Critical Deutsche Babcock Werke Energie und Umwelttechnik AG
Publication of EP0475029A2 publication Critical patent/EP0475029A2/fr
Publication of EP0475029A3 publication Critical patent/EP0475029A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F22B31/0015—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 water tube type
    • F22B31/003—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 water tube type with tubes surrounding the bed or with water tube wall partitions
    • 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
    • F22B31/0084—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 with recirculation of separated solids or with cooling of the bed particles outside the combustion 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 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
    • F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
    • F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
    • F23C10/10—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
    • 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
    • F23C10/26—Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
    • 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 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/003—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel

Definitions

  • the invention relates to a fluidized bed furnace with a stationary fluidized bed for a hot water or steam generator and a method for producing hot water or steam with the aid of a stationary fluidized bed furnace according to the preamble of patent claims 1 and 2.
  • the combustion air serving as the fluidizing gas penetrates the fluidized bed at a comparatively low inflow speed of 1 to 2.0 m / s.
  • a characteristic feature of the known stationary fluidized bed furnaces are the immersion heating surfaces in the fluidized bed. Due to the good heat transfer in the fluidized bed, the immersion heating surfaces transfer a large part of the combustion heat released in the boiler to the water / steam cycle. This fact and the possible compact arrangement of the heating surfaces due to the low dust pollution of the flue gas leads to a compact boiler construction.
  • the immersion heating surfaces thus offer advantages for steam generation and construction on the one hand, but on the other hand cause disadvantages in that they are subject to mechanical attack by erosion and make partial load operation more difficult, since they always absorb the full amount of fuel heat released in the fluidized bed.
  • the invention is based, to design the generic fluidized bed combustion in such a way that it is suitable for small boilers with an output of less than 50 MW therm , a good part-load behavior and low pollutant emissions to be achieved.
  • the boiler according to the invention like the boiler with immersion heating surfaces in the fluidized bed, is distinguished by a compact design which enables the workshop to be prefabricated as far as possible without high assembly costs.
  • the boiler can be self-supporting, so that a steel support structure for the boiler can be omitted.
  • good partial load control is provided and erosion problems are avoided.
  • the drawing shows schematically a steam or hot water generator.
  • the boiler 1 used for the production of hot water or steam is designed as a draw-in boiler, the peripheral walls of which consist of tubes which are welded to one another in a gas-tight manner via webs.
  • an air box 2 is provided which is closed by a nozzle base 3 on which a stationary fluidized bed 4 is built up.
  • the flue gas line 10 leads via a cyclone 11, a filter 12 and a suction fan 13 to a chimney, not shown.
  • the sections 8, 9 above the free space 5 accommodate convection heating surfaces 14, 15.
  • the water to be heated is fed to the convection heating surface 14 arranged in the downward flow section 9, then flows through the pipes of the peripheral walls of the boiler and then through the convection heating surface 15 in the upward flow section 8. In the event that steam is generated, this last convection heating surface is used 15 as superheater.
  • Lumpy lignite also serves as fuel a grain size less than 25 mm or lumpy hard coal with a grain size less than 10 mm.
  • the coal is temporarily stored in a coal bunker 16. Below the coal bunker 16 is a trigger 17, z. B. a trough chain conveyor arranged with a loading device 18, z. B. a litter feeder is connected.
  • the charging member 18 is arranged in the front wall of the boiler at the height of the free space 5 and carries the fuel into the
  • Fluidized bed 4 a The lime intended for the desulfurization of the flue gas is temporarily stored in a lime bunker 19.
  • the discharge end of the lime bunker 19 is provided with a cellular wheel sluice 20 and connected to the discharge element 17 of the coal bunker 16.
  • the solids discharge of the cyclone 11 and the filter 12 is connected to an ash hopper 24 via a cross conveyor 21, a vertical conveyor 22 and a further cross conveyor 23.
  • the outlet of the ash bunker is provided with a cellular wheel sluice 25 and connected to the extraction element 17 of the coal bunker 16. The solid separated from the cold flue gas is thus introduced into the fluidized bed 4 together with the coal and the lime.
  • the nozzle base 3 is provided with a drain pipe 26, via which bed ash can be drawn off from the fluidized bed 4.
  • the bed ash also passes into the ash bunker 24 via the cross conveyors 21, 23 and the vertical conveyor 22. Excess solid is drawn off from the system via a second outlet 27 of the ash bunker 24.
  • a fresh fan 28 is connected to the air box 2 via an air line 29.
  • a branch line 30 branches off from the air line 29 and leads to air nozzles 31 which are arranged in the side wall of the boiler in the free space 5 above the fluidized bed 4.
  • a throttle valve 32 is arranged in each of the air line 29 and the secondary line 30.
  • the fresh fan 28 draws in combustion air and does not lead it to the free space 5 as preheated as primary or fluidizing air via the air box 2 of the fluidized bed 4 and as secondary air.
  • a recirculation line 34 provided with a recirculation blower 33 and a throttle valve 32 leads to the air box 2.
  • cold flue gas is supplied to the fluidized bed 4 in a controlled amount as a heat carrier for controlling the bed temperature.
  • the gaseous medium flowing through the nozzle base 3 is set in such a way that the vortex speed is max. Is 3.5 m / s.

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)
EP19910112289 1990-09-13 1991-07-23 Fluidized bed furnace with a stationary bed Withdrawn EP0475029A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904029065 DE4029065A1 (de) 1990-09-13 1990-09-13 Wirbelschichtfeuerung mit einer stationaeren wirbelschicht
DE4029065 1990-09-13

Publications (2)

Publication Number Publication Date
EP0475029A2 true EP0475029A2 (fr) 1992-03-18
EP0475029A3 EP0475029A3 (en) 1992-09-16

Family

ID=6414183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910112289 Withdrawn EP0475029A3 (en) 1990-09-13 1991-07-23 Fluidized bed furnace with a stationary bed

Country Status (6)

Country Link
EP (1) EP0475029A3 (fr)
JP (1) JPH05346203A (fr)
AU (1) AU641022B2 (fr)
CS (1) CS281591A3 (fr)
DE (1) DE4029065A1 (fr)
PL (1) PL291687A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660041A2 (fr) * 1993-12-22 1995-06-28 Combustion Engineering, Inc. Système d'alimentation gravimétrique en combustible et en sorbant d'une chaudière
CN104566947A (zh) * 2013-10-17 2015-04-29 无锡东马锅炉科技有限公司 一种热水蒸汽联产锅炉装置与方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408635C2 (de) * 1994-03-09 1997-03-27 Ver Energiewerke Ag Verfahren und Anordnung zur Zufuhr von vorgebrochener Kohle, insbesondere Rohbraunkohle, in eine zirkulierende druckaufgeladene Wirbelbettfeuerung
CN103604116A (zh) * 2013-11-22 2014-02-26 张建存 降低循环流化床锅炉烟气产物中氮氧化物的装置及其方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037858A1 (fr) * 1980-04-16 1981-10-21 BBC Aktiengesellschaft Brown, Boveri & Cie. Centrale à vapeur avec générateur de vapeur à combustion sous pression et à lit fluidisé
EP0152529A2 (fr) * 1984-02-21 1985-08-28 Deutsche Babcock Werke Aktiengesellschaft Générateur de vapeur avec combustion en lit fluidisé stationnaire
EP0226140A2 (fr) * 1985-12-16 1987-06-24 Steag Ag Procédé et dispositif de combustion de combustibles solides dans un lit fluidisé circulant
DE3638766A1 (de) * 1986-11-13 1988-05-26 Steinmueller Gmbh L & C Verfahren zum verbrennen von kohlenstoffhaltigen materialien in einem wirbelschichtreaktor und dampferzeuger zur durchfuehrung des verfahrens
EP0289281A1 (fr) * 1987-04-27 1988-11-02 Foster Wheeler Energy Corporation Réacteur à lit fluidisé

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989000659A1 (fr) * 1987-07-20 1989-01-26 Ebara Corporation Chaudiere a lit fluidise du type a circulation interne et procede de commande
US4665864A (en) * 1986-07-14 1987-05-19 Foster Wheeler Energy Corporation Steam generator and method of operating a steam generator utilizing separate fluid and combined gas flow circuits
US4714049A (en) * 1986-10-08 1987-12-22 Dorr-Oliver Incorporated Apparatus to reduce or eliminate fluid bed tube erosion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037858A1 (fr) * 1980-04-16 1981-10-21 BBC Aktiengesellschaft Brown, Boveri & Cie. Centrale à vapeur avec générateur de vapeur à combustion sous pression et à lit fluidisé
EP0152529A2 (fr) * 1984-02-21 1985-08-28 Deutsche Babcock Werke Aktiengesellschaft Générateur de vapeur avec combustion en lit fluidisé stationnaire
EP0226140A2 (fr) * 1985-12-16 1987-06-24 Steag Ag Procédé et dispositif de combustion de combustibles solides dans un lit fluidisé circulant
DE3638766A1 (de) * 1986-11-13 1988-05-26 Steinmueller Gmbh L & C Verfahren zum verbrennen von kohlenstoffhaltigen materialien in einem wirbelschichtreaktor und dampferzeuger zur durchfuehrung des verfahrens
EP0289281A1 (fr) * 1987-04-27 1988-11-02 Foster Wheeler Energy Corporation Réacteur à lit fluidisé

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660041A2 (fr) * 1993-12-22 1995-06-28 Combustion Engineering, Inc. Système d'alimentation gravimétrique en combustible et en sorbant d'une chaudière
EP0660041A3 (fr) * 1993-12-22 1997-05-14 Combustion Eng Système d'alimentation gravimétrique en combustible et en sorbant d'une chaudière.
CN104566947A (zh) * 2013-10-17 2015-04-29 无锡东马锅炉科技有限公司 一种热水蒸汽联产锅炉装置与方法

Also Published As

Publication number Publication date
EP0475029A3 (en) 1992-09-16
PL291687A1 (en) 1992-06-26
DE4029065A1 (de) 1992-03-19
CS281591A3 (en) 1992-03-18
AU7921991A (en) 1992-03-19
AU641022B2 (en) 1993-09-09
JPH05346203A (ja) 1993-12-27

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