EP0205761A2 - Dispositif pour la variation de la hauteur du lit dans une chambre de combustion à lit fluidisé - Google Patents

Dispositif pour la variation de la hauteur du lit dans une chambre de combustion à lit fluidisé Download PDF

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Publication number
EP0205761A2
EP0205761A2 EP86103253A EP86103253A EP0205761A2 EP 0205761 A2 EP0205761 A2 EP 0205761A2 EP 86103253 A EP86103253 A EP 86103253A EP 86103253 A EP86103253 A EP 86103253A EP 0205761 A2 EP0205761 A2 EP 0205761A2
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
fluidized bed
bed combustion
pressure
collecting container
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
EP86103253A
Other languages
German (de)
English (en)
Other versions
EP0205761A3 (en
EP0205761B1 (fr
Inventor
Hans-Joachim Meier
Rafael Aruth
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 AG
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 AG, Deutsche Babcock Werke Energie und Umwelttechnik AG filed Critical Deutsche Babcock Werke AG
Priority to AT86103253T priority Critical patent/ATE56519T1/de
Publication of EP0205761A2 publication Critical patent/EP0205761A2/fr
Publication of EP0205761A3 publication Critical patent/EP0205761A3/de
Application granted granted Critical
Publication of EP0205761B1 publication Critical patent/EP0205761B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
    • F23C10/30—Control devices specially adapted for fluidised bed, combustion apparatus for controlling the level of the bed or the amount of material in 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 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/16—Fluidised bed combustion apparatus specially adapted for operation at superatmospheric pressures, e.g. by the arrangement of the combustion chamber and its auxiliary systems inside a pressure vessel

Definitions

  • the invention relates to a device for changing the bed height in a fluidized bed combustion chamber with the features of the preamble of claim 1.
  • the fluidized bed combustion chamber is connected to the storage container via two lines.
  • the discharge line is connected to the storage container via a cyclone separator and is located under to put low pressure.
  • a line opens into the separate return line, in which an increased pressure is to be set. Both pressure lines are equipped with valves.
  • the known device for adjusting the layer height therefore requires a lot of equipment.
  • the invention has for its object to improve the known device in terms of pressure build-up and pressure reduction and the possibility of cleaning the gas reaching the material in the collecting container.
  • the device according to the invention is through the use of a single delivery line and. a single pressure line, which is to be set under changing pressure, and considerably simplified by the integration of the hot gas filter in the storage container.
  • the hot gas filter flows through in the opposite direction and is thus cleaned.
  • the gas can thus be largely cleaned in a simple manner.
  • a fluidized bed combustion chamber 2 is arranged within a pressure vessel 1 under increased pressure.
  • the fluidized bed combustion chamber 2 has a nozzle base 3, above which a fluidized bed 4 is located.
  • flow-through tubes for generating steam are laid. These tubes are not essential to the invention and are therefore not shown for reasons of clarity.
  • the compressor 7 feeds air into the pressure vessel 1 under increased pressure.
  • the air penetrates through the nozzle base 3 into the fluidized bed 4 and burns the fuel present there.
  • the hot flue gas generated is cleaned in separators, not shown, and fed to a gas turbine 8, in which it is expanded.
  • the gas turbine 8 drives the compressor 7 and a generator 9.
  • one or more collecting containers 10 are provided, which are arranged within the pressure container 1 and are expediently provided with insulation.
  • the walls of the collecting container 10 can also be surrounded by pipes or can be formed by pipes through which feed water or steam flows.
  • Each collecting container 10 is connected to the fluidized bed combustion chamber 2 via a delivery line 11, the delivery line 11 opening into the lower part of the fluidized bed 4.
  • the conveyor line 11 has an inclined section, the inclination of which is 10 ° to 30 ° with respect to the horizontal. This inclined section prevents undesired overflow of the bed material between the collecting containers 10 and the fluidized bed combustion chamber 2.
  • Hot gas filters 12 are provided in the upper part of the collecting container 10.
  • the hot gas filters 12 are made of a ceramic material and consist of tubes open on one side or of a ceramic woven or non-woven material which can be used at temperatures up to about 1000 ° C.
  • the collecting container 10 is provided with a gas connection 13, via which the collecting container 10 is to be placed under changing pressure.
  • the gas connection 13 and the delivery line 11 of each collecting container 10 are connected to a pressure line 14, 15 which is branched off from the air line 6 leading from the compressor 7 to the pressure container 1.
  • a pressure-increasing fan 16, 17 and a throttle and shut-off device 18, 19 are arranged in the pressure lines 14, 15.
  • a second pressure line 20 can branch off from the air line 6, in which a pressure-increasing blower 21 and throttle and shut-off elements 22, 23 are arranged.
  • This second pressure line 20 is connected to coils 24, 25 which are laid in the free space 5 of the fluidized bed combustion chamber 2.
  • the air is heated to a temperature which approximately corresponds to the temperature in the collecting containers 10 before entering the collecting containers 10 and passing through the hot gas filters 12. In this way, a possible temperature shock of the ceramic hot gas filter 12 can be avoided.
  • each collecting container 10 is further connected to an expansion line 26, 27, in which throttle and shut-off devices 28, 29 are arranged.
  • the expansion line 26, 27 is led to the gas turbine 8 and connected to such a point in the gas turbine system, the pressure of which corresponds to the pressure in the expansion line 26, 27. All throttle and shut-off devices 18, 19, 22, 23, 28, 29 are outside the pressure vessel 1.
  • bed material is drawn off from the fluidized bed 4 and stored in the collecting container 10.
  • the bed material stored in the collecting container 10 is then returned to the fluidized bed combustion chamber 2 to increase the bed height.
  • the bed material is discharged by applying a lower gas-side pressure in the collecting container 10 through the gas connection 13 and the expansion lines 26, 27 than in the fluidized bed combustion chamber 2. In this way, the bed material is conveyed into the collecting container 10 by means of pneumatic negative pressure conveyance.
  • the bed material By isolating the collecting container 10 or through the medium flowing through the walls of the collecting container 10, the bed material can be kept hot for a long time, so that it can be returned to the fluidized bed combustion chamber 2 in the hot state if necessary.
  • the gases inevitably discharged from the fluidized bed 4 during the pneumatic transport of the bed material are cleaned in the hot gas filter 12 integrated into the collecting container 10. The cleaned gas can be fed into the gas turbine system at a suitable point.
  • the pressure is increased to such an extent that it lies above the pressure in the fluidized bed combustion chamber 2. Because of the increased pressure in this way, the bed material is conveyed from the collecting containers 10 into the fluidized bed combustion chamber 2 via the delivery lines 11. The transport of the bed material is supported by a conveying air flow, which is blown directly into the conveying lines 11 through the pressure lines 14, 15. During the emptying of the collecting container 10, the hot gas filters 12 are flowed through by the air in the opposite direction and at the same time cleaned in a simple manner.
  • the fluidized bed combustion chamber 2 is provided with partially converging side walls according to FIGS. 2 and 3.
  • Conver g IE rend extending side walls of the collection container 10 are attached directly to the fluidized bed combustor. 2
  • the collection containers 10 are connected to the fluidized bed 4 of the fluidized bed combustion chamber 2 by a siphon-like slot 30.
  • This siphon-like slot 30 prevents the bed material from being inadvertently passed over.
  • the collecting container 10 has an air box 31 which is sealed off from the pressure container 1 and a nozzle base.
  • the air box 31 is connected to an air connection 32 which is led out through the pressure vessel.
  • Another air connection 33 is provided with a distributor 34, which is provided in the vicinity of the slot 30. Otherwise, the collecting containers 10 according to FIGS. 2 and 3 correspond to those according to FIG. 1.
  • the loading and unloading processes are stimulated by fluidizing the collecting container 10.
  • the fluidization takes place at a higher pressure in the case of emptying and at a lower pressure in the case of filling.
  • the fluidization gases emerging during the filling of the collecting container 10 are drawn off and cleaned via the ceramic hot gas filter 12 integrated in the collecting container 10.
  • air can be introduced into the collecting containers 10 through the gas connections 13 and the hot gas filters 12 can thus be cleaned.
  • the fluidization air introduced into the slot 30 via the distribution device 34 ensures a perfect flowing bed material in this area.

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)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
EP86103253A 1985-06-22 1986-03-11 Dispositif pour la variation de la hauteur du lit dans une chambre de combustion à lit fluidisé Expired - Lifetime EP0205761B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86103253T ATE56519T1 (de) 1985-06-22 1986-03-11 Vorrichtung zur veraenderung der schichthoehe in einer wirbelschichtbrennkammer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853522394 DE3522394A1 (de) 1985-06-22 1985-06-22 Vorrichtung zur veraenderung der schichthoehe in einer wirbelschichtbrennkammer
DE3522394 1985-06-22

Publications (3)

Publication Number Publication Date
EP0205761A2 true EP0205761A2 (fr) 1986-12-30
EP0205761A3 EP0205761A3 (en) 1988-02-24
EP0205761B1 EP0205761B1 (fr) 1990-09-12

Family

ID=6273920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103253A Expired - Lifetime EP0205761B1 (fr) 1985-06-22 1986-03-11 Dispositif pour la variation de la hauteur du lit dans une chambre de combustion à lit fluidisé

Country Status (4)

Country Link
US (1) US4667610A (fr)
EP (1) EP0205761B1 (fr)
AT (1) ATE56519T1 (fr)
DE (2) DE3522394A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE450164B (sv) * 1985-10-22 1987-06-09 Asea Stal Ab Sett att reglera beddhojden i en kraftanleggning med en fluidiserad bedd och kraftanleggning med anordning for reglering av beddhojden
DE3628675C1 (de) * 1986-08-23 1987-12-10 Babcock Werke Ag Druckaufgeladene Wirbelschichtfeuerung
SE469043B (sv) * 1991-09-05 1993-05-03 Abb Carbon Ab Foerfarande och anordning foer varmhaallning av baeddmassa i pfbc-anlaeggningar

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648380A (en) * 1970-05-28 1972-03-14 Aluminum Co Of America Fluidized bed level control
DE3004846A1 (de) * 1980-02-09 1981-08-20 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zur schnellen, unmittelbaren reversiblen mengenaenderung de wirbelschichtmasse einer wirbelschichtfeuerung
DE3004848A1 (de) * 1980-02-09 1981-08-20 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zum wechselweisen betrieb einerwirbelschichtfeuerung mit oder ohne aufladung
GB1604313A (en) * 1978-05-31 1981-12-09 Appa Thermal Exchanges Ltd Control of bed level in fluidised bed apparatus
EP0124842A1 (fr) * 1983-05-05 1984-11-14 ASEA Stal Aktiebolag Installation pour la production d'énergie avec une chambre de combustion à lit fluidisé
US4546709A (en) * 1983-07-15 1985-10-15 Gotaverken Energy Systems Ab Apparatus for the combustion of carbonaceous material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4279205A (en) * 1979-09-24 1981-07-21 Wormser Engineering, Inc. Storage
US4419965A (en) * 1981-11-16 1983-12-13 Foster Wheeler Energy Corporation Fluidized reinjection of carryover in a fluidized bed combustor
US4488512A (en) * 1982-11-04 1984-12-18 Boyle Bede Alfred Feedstock injection system for fluidized bed combustor
SE457560B (sv) * 1984-06-13 1989-01-09 Abb Stal Ab Saett att taenda en braennkammare med en fluidiserad baedd och kraftanlaeggning foer utnyttjande av saettet

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648380A (en) * 1970-05-28 1972-03-14 Aluminum Co Of America Fluidized bed level control
GB1604313A (en) * 1978-05-31 1981-12-09 Appa Thermal Exchanges Ltd Control of bed level in fluidised bed apparatus
DE3004846A1 (de) * 1980-02-09 1981-08-20 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zur schnellen, unmittelbaren reversiblen mengenaenderung de wirbelschichtmasse einer wirbelschichtfeuerung
DE3004848A1 (de) * 1980-02-09 1981-08-20 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zum wechselweisen betrieb einerwirbelschichtfeuerung mit oder ohne aufladung
EP0124842A1 (fr) * 1983-05-05 1984-11-14 ASEA Stal Aktiebolag Installation pour la production d'énergie avec une chambre de combustion à lit fluidisé
US4546709A (en) * 1983-07-15 1985-10-15 Gotaverken Energy Systems Ab Apparatus for the combustion of carbonaceous material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DOE/MC/14129-173 (DE81025923), "Pressurized Fluidized Bed Combustion Part Load Behavior", A.G. Roberts et al., February 1981 *

Also Published As

Publication number Publication date
DE3522394C2 (fr) 1987-08-20
DE3522394A1 (de) 1987-01-02
US4667610A (en) 1987-05-26
EP0205761A3 (en) 1988-02-24
EP0205761B1 (fr) 1990-09-12
ATE56519T1 (de) 1990-09-15
DE3674075D1 (de) 1990-10-18

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