EP0236647A1 - Wirbelbettwärmeerzeuger mit Mitteln für Aschenbeseitigung und Wärmerückgewinnung - Google Patents

Wirbelbettwärmeerzeuger mit Mitteln für Aschenbeseitigung und Wärmerückgewinnung Download PDF

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Publication number
EP0236647A1
EP0236647A1 EP86402830A EP86402830A EP0236647A1 EP 0236647 A1 EP0236647 A1 EP 0236647A1 EP 86402830 A EP86402830 A EP 86402830A EP 86402830 A EP86402830 A EP 86402830A EP 0236647 A1 EP0236647 A1 EP 0236647A1
Authority
EP
European Patent Office
Prior art keywords
hearth
tubes
generator according
central
volume
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
EP86402830A
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English (en)
French (fr)
Other versions
EP0236647B1 (de
Inventor
Guy Marlair
Alexandre Petrovic
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.)
Charbonnages de France CDF
IFP Energies Nouvelles IFPEN
Original Assignee
Charbonnages de France CDF
IFP Energies Nouvelles IFPEN
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.)
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Publication date
Application filed by Charbonnages de France CDF, IFP Energies Nouvelles IFPEN filed Critical Charbonnages de France CDF
Priority to AT86402830T priority Critical patent/ATE45794T1/de
Publication of EP0236647A1 publication Critical patent/EP0236647A1/de
Application granted granted Critical
Publication of EP0236647B1 publication Critical patent/EP0236647B1/de
Expired 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 or dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or 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 or 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 or 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

Definitions

  • the subject of the invention is a moderate power thermal generator with a fluidized bed comprising improved means for evacuating the centers and recovering heat, usable in particular for solid fuels in particles (coals, granules of household waste, etc.). .) or pasty (heavy petroleum fractions, residual sludge, etc.).
  • a generator of this type operating according to the fluidized bed combustion technique has the advantage of using a wide range of fuels.
  • the production of such a generator poses construction and industrialization problems linked to the evacuation of the centers and the treatment of the fumes.
  • the main object of the invention is to achieve a generator of the type indicated above with which the difficulties set out above are overcome substantially if not totally, in a simple and effective manner.
  • this peripheral envelope limits with the central hearth at least one intermediate volume which is placed in communication with the central hearth in its upper part by openings for smoke and which is connected at its lower part to smoke tubes, by a first end thereof; these smoke tubes extend in the peripheral envelope over a substantial part of their length and are connected by their second end to the smoke outlet duct.
  • the intermediate volume thus created is advantageously provided at its lower part with a collector for collecting and extracting the ash entrained by the fumes.
  • the intermediate volume constitutes a primary dust collector which is integrated into the generator upstream of the smoke tubes and which protects these tubes against the risks of fouling and premature erosion.
  • This arrangement avoids the use of a smoke box which is often produced by mechanical welding and which is attached using flanges on the heat generator.
  • the compactness of the generator according to the invention is improved and the prefabrication is facilitated.
  • the fluidized bed hearth has at least one side wall with water tubes surrounded by the peripheral envelope with a symmetrical arrangement which avoids the problems of differential expansion and resistance over time of the generator.
  • the vertical wall is made up of water tubes joined in a sealed manner by membranes; this construction method facilitates industrial production of the generator and improves heat transfer.
  • the fluidization grid is part of the filled enclosure of water which is placed in communication with the peripheral envelope.
  • This design allows a lowering of the temperature of the grid, which allows its manufacture in economical material.
  • all the walls delimiting the fluidized bed, including the grid itself, thus participate in the heat exchange. This makes it possible to reduce the exchange surfaces to be immersed in the bed; it follows that the tubes constituting these exchange surfaces can be arranged more freely, avoiding the areas where a strong erosion would occur.
  • the fluidization grid used in the thermal generator according to the invention is in itself of a known type; this may in particular be a grid with openings flared upwards, such as those which are the subject of documents FR-A- Nos 2 171 945, 2 519 877, 85-08320, 85-15580.
  • At least one of the walls of the hearth has one (or more sieuurss) opening (s) provided (s) with a selective closing means; this opening makes it possible to regulate the level of the fluidized bed.
  • the ash collector contains a water circulation loop connected to the hollow peripheral envelope. This loop completes the thermal exhaustion of the ashes and further improves the efficiency of the unit.
  • the generator has a device for re-injecting the ash collected by a final dust collector (for example a multi-cyclone) connected to the smoke circuit at the outlet of the boiler.
  • a final dust collector for example a multi-cyclone
  • This device thus makes it possible to improve the desulfurization in situ, to reduce unburnt residues and to limit the extraction points of the ashes.
  • This device can be produced, for example, pneumatically, bypassing the arrival of fluidizing air or secondary air or mechanically by conveying using a conveyor screw.
  • a generator according to the invention comprises a hearth 1 with a fluidized bed, with side wall, of a type known per se and a peripheral casing 2 which envelops the hearth 1 by limiting with the side wall 3 of the latter an intermediate volume 4.
  • the hearth 1 could be cylindrical as well as the peripheral envelope 2, so that the intermediate volume 4 would be an annular volume.
  • openings 5 put it in communication with the intermediate volume 4.
  • the hearth 1 has a generally rectangular configuration; the peripheral envelope 2 is cylindrical and it limits, with the hearth 1, two separate and opposite intermediate volumes 4A, 4B which are each located on a long side of the hearth 1.
  • the two long sides 3A, 3B of the hearth 1 are formed by tubes of parallel, spaced 3C water, connected to each other in a sealed manner by 3D intermediate membranes, in a manner known per se.
  • certain tubes, preferably one tube out of two, are offset towards the exterior of the hearth 1 and the 3D intermediate membranes are eliminated in the remote end portion of each tube 3C.
  • the upper openings 5 are thus obtained through which the fumes from the hearth 1 can circulate.
  • the hearth 1 is closed at its upper part, at a level higher than that of the openings 5, by an upper wall 1A which projects beyond the hearth 1 and which also closes the intermediate volumes 4A, 4B.
  • the fumes can enter the latter only through the upper openings 5.
  • the peripheral envelope 2 also covers the hearth 1 above this upper wall 1A. In this way, the peripheral envelope extends around the side wall and the upper wall of the hearth 1; it wraps the latter completely on all sides.
  • the peripheral envelope 2 is closed by an upper wall 6.
  • the latter supports a smoke outlet duct 7.
  • the peripheral envelope 2 is divided by interior, radial partitions 6A, 6B, 6C, 6D forming four compartments opposite two by two.
  • Two opposite compartments, of larger dimension in circumferential direction 8A and 8C contain vertical tubes 9, spaced apart, which extend between the lower wall 10 of the peripheral envelope 2 and its upper wall 6. These tubes 9 pass through this upper wall 6 and open into the smoke outlet duct 7.
  • each tube 9 crosses the lower wall 10 and opens into an ash collector 11.
  • An ash collector 11 is provided under each of the two compartments 8A, 8C of the peripheral envelope 2.
  • Each collector 11 extends below the lower wall 10 and it communicates by a lower passage 11A with a corresponding intermediate volume 4A, 4B.
  • the combustion fumes coming from the upper passages 5 descend into the intermediate volumes diaries 4A, 4B, use the collectors 11 and rise in the tubes 9 to reach the flue outlet duct 7.
  • Each collector 11 has a depth sufficient for ashes to collect therein without the circulation of smoke being interrupted.
  • each collector 11 is equipped at 12 with pneumatic means known per se, for extracting the ashes and for reintroducing these ashes inside the fluidized bed, to ensure their recycling.
  • the two other opposite compartments 8B, 8D are provided, respectively, with a water inlet 13 and a water outlet 14.
  • these two compartments are connected directly, through the hearth 1, by tubes of water 15 (visible only in FIG. 1) which are drowned during operation in the bed 16 of fluidized combustible material.
  • tubes of water 15 visible only in FIG. 1
  • a pipe 18 crosses from top to bottom the smoke outlet duct 7, the upper wall 6 of the peripheral envelope 2, the upper wall 1A of the hearth 1 to extend inside the latter and stop at the above the upper level of the fluidized bed 16.
  • This pipe 18 serves to supply the hearth 1 with fuel. It will be noted that the invention is compatible with other modes of supplying the hearth 1 with fuel.
  • the pipe 18 is cooled by a forced water circulation loop connected in bypass to the general supply input / output circuit.
  • the grid 19 is represented as a hollow grid having an internal volume 19A into which the water tubes 3 open, by their lower end. These tubes 3 are therefore joined to the peripheral envelope 2 at the level of the grid 19.
  • the fluidization grid 19 ⁇ is of conventional construction and it rests on a hollow enclosure 20 which supports it and whose internal volume is placed in communication with the internal volume of the peripheral envelope 2.
  • this hollow enclosure 20 is traversed in a sealed manner by tubes 21 which supply fluidization gas to the usual orifices of the grid 19 gaz.
  • the grid is of conventional construction; it is neither cooled nor supported by a cooled hollow enclosure.
  • the ashes are collected without bulky material means and can then be disposed of easily, either to dispose of them definitively or to recycle them in the fluidized bed.
  • the compartments 8B, 8D can also be eliminated; the peripheral envelope 2 then becomes a single envelope annularly surrounding the side wall of the hearth 1.
  • the latter can be cylindrical and the intermediate volume 4 can also annularly surround the side wall of the hearth 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Processing Of Solid Wastes (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Solid-Fuel Combustion (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
EP86402830A 1985-12-18 1986-12-16 Wirbelbettwärmeerzeuger mit Mitteln für Aschenbeseitigung und Wärmerückgewinnung Expired EP0236647B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86402830T ATE45794T1 (de) 1985-12-18 1986-12-16 Wirbelbettwaermeerzeuger mit mitteln fuer aschenbeseitigung und waermerueckgewinnung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8518764 1985-12-18
FR8518764A FR2591722B1 (fr) 1985-12-18 1985-12-18 Generateur thermique a lit fluidise a moyens ameliores d'evacuation des cendres et de recuperation de chaleur

Publications (2)

Publication Number Publication Date
EP0236647A1 true EP0236647A1 (de) 1987-09-16
EP0236647B1 EP0236647B1 (de) 1989-08-23

Family

ID=9325923

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402830A Expired EP0236647B1 (de) 1985-12-18 1986-12-16 Wirbelbettwärmeerzeuger mit Mitteln für Aschenbeseitigung und Wärmerückgewinnung

Country Status (18)

Country Link
US (1) US4736711A (de)
EP (1) EP0236647B1 (de)
JP (1) JPS62175505A (de)
CN (1) CN1008656B (de)
AT (1) ATE45794T1 (de)
AU (1) AU581160B2 (de)
CA (1) CA1294499C (de)
DE (2) DE236647T1 (de)
DK (1) DK164715C (de)
ES (1) ES2000154B3 (de)
FI (1) FI865169A7 (de)
FR (1) FR2591722B1 (de)
GR (2) GR880300086T1 (de)
IN (1) IN169114B (de)
NO (1) NO162485C (de)
PT (1) PT83940B (de)
YU (1) YU46036B (de)
ZA (1) ZA869456B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0398814A1 (de) * 1989-05-19 1990-11-22 CHARBONNAGES DE FRANCE, Etablissement public dit: Vorrichtung zum Extrahieren von Materialteilchen aus einem Wirbelbett aus einem Wirbelbettgefäss

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE459987B (sv) * 1987-12-23 1989-08-28 Abb Stal Ab Saett att kyla aska och kraftanlaeggning med en anordning foer askkylning
DE4005305A1 (de) * 1990-02-20 1991-08-22 Metallgesellschaft Ag Wirbelschichtreaktor
US5484476A (en) * 1994-01-11 1996-01-16 Electric Power Research Institute, Inc. Method for preheating fly ash
US7540384B2 (en) * 2004-10-12 2009-06-02 Great River Energy Apparatus and method of separating and concentrating organic and/or non-organic material
US8062410B2 (en) 2004-10-12 2011-11-22 Great River Energy Apparatus and method of enhancing the quality of high-moisture materials and separating and concentrating organic and/or non-organic material contained therein
US7987613B2 (en) * 2004-10-12 2011-08-02 Great River Energy Control system for particulate material drying apparatus and process
US7275644B2 (en) * 2004-10-12 2007-10-02 Great River Energy Apparatus and method of separating and concentrating organic and/or non-organic material
US8579999B2 (en) * 2004-10-12 2013-11-12 Great River Energy Method of enhancing the quality of high-moisture materials using system heat sources
US8523963B2 (en) * 2004-10-12 2013-09-03 Great River Energy Apparatus for heat treatment of particulate materials
CN110864280B (zh) * 2018-08-28 2021-05-04 国家能源投资集团有限责任公司 燃烧含碳固体燃料的反应器和装置以及含碳固体燃料的燃烧方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029155A1 (de) * 1969-06-12 1970-12-23
EP0016607A1 (de) * 1979-03-14 1980-10-01 The British Petroleum Company p.l.c. Fliessbett-Verbrennungsvorrichtung
EP0028458A2 (de) * 1979-10-03 1981-05-13 Sandfire (Proprietary) Limited Dampferzeuger mit Wirbelschicht-Brennkammer
GB2077616A (en) * 1980-06-10 1981-12-23 Parkinson Cowan Appliances Ltd Fluidised bed boiler
GB2109096A (en) * 1981-07-24 1983-05-25 Duncomb Wallace Walker Locomotive boiler fired by fluidised bed combustion
EP0005964B1 (de) * 1978-05-31 1984-03-07 Deborah Fluidised Combustion Limited Kessel und Verbrennungsvorrichtung hierfür

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1684201A (en) * 1927-02-26 1928-09-11 Pollock James Boiler for utilizing fine coal
US2832320A (en) * 1953-12-14 1958-04-29 Thome Robert Gas-fired boiler, more particularly for central heating plants
BE795348A (fr) * 1972-02-16 1973-05-29 Charbonnages De France Dispositif d'alimentation en gaz d'un reacteur de traitement par fluidisation
GB1513795A (en) * 1976-04-14 1978-06-07 Coal Ind Boilers
GB1604999A (en) * 1978-05-31 1981-12-16 Deborah Fluidised Combustion Boilers
GB2073910A (en) * 1980-04-11 1981-10-21 World Energy Resources Consult Controls for fluidised bed burners
NZ197338A (en) * 1980-06-10 1985-03-20 Thorn Emi Energy Dev Fluidised bed boiler
US4349969A (en) * 1981-09-11 1982-09-21 Foster Wheeler Energy Corporation Fluidized bed reactor utilizing zonal fluidization and anti-mounding pipes
FR2519877B1 (fr) * 1982-01-20 1986-10-31 Charbonnages De France Grille de fluidisation ainsi que foyer de combustion a grille inferieure de soufflage d'air et procede de traitement de matiere particulaire dans une chambre de fluidisation et/ou d'entrainement
FR2556075B1 (fr) * 1983-12-02 1988-08-19 Charbonnages De France Foyer de combustion pour chaudiere a lit fluidise
US4565184A (en) * 1984-05-17 1986-01-21 Collins Bruce H Combustible particulate fuel heater
FR2582540B1 (fr) * 1985-06-03 1992-05-22 Charbonnages De France Dispositif de controle de l'alimentation en gaz de fluidisation des ouvertures de soufflage d'une grille de fluidisation et grille munie de ce dispositif

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029155A1 (de) * 1969-06-12 1970-12-23
EP0005964B1 (de) * 1978-05-31 1984-03-07 Deborah Fluidised Combustion Limited Kessel und Verbrennungsvorrichtung hierfür
EP0016607A1 (de) * 1979-03-14 1980-10-01 The British Petroleum Company p.l.c. Fliessbett-Verbrennungsvorrichtung
EP0028458A2 (de) * 1979-10-03 1981-05-13 Sandfire (Proprietary) Limited Dampferzeuger mit Wirbelschicht-Brennkammer
GB2077616A (en) * 1980-06-10 1981-12-23 Parkinson Cowan Appliances Ltd Fluidised bed boiler
GB2109096A (en) * 1981-07-24 1983-05-25 Duncomb Wallace Walker Locomotive boiler fired by fluidised bed combustion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0398814A1 (de) * 1989-05-19 1990-11-22 CHARBONNAGES DE FRANCE, Etablissement public dit: Vorrichtung zum Extrahieren von Materialteilchen aus einem Wirbelbett aus einem Wirbelbettgefäss
FR2647031A1 (fr) * 1989-05-19 1990-11-23 Charbonnages De France Dispositif d'extraction du materiau en particules d'un lit fluidise hors de l'enceinte de fluidisation
US5143697A (en) * 1989-05-19 1992-09-01 Charbonnages De France Device for extracting particulate materials of a fluidized bed from the fluidization enclosure

Also Published As

Publication number Publication date
YU216386A (en) 1989-12-31
DK608486A (da) 1987-06-19
ES2000154A4 (es) 1987-12-16
FR2591722A1 (fr) 1987-06-19
FI865169A7 (fi) 1987-06-19
DK608486D0 (da) 1986-12-17
DK164715C (da) 1992-12-28
AU6679186A (en) 1987-06-25
ZA869456B (en) 1987-08-26
JPS62175505A (ja) 1987-08-01
CN1008656B (zh) 1990-07-04
GR3000135T3 (en) 1990-11-29
EP0236647B1 (de) 1989-08-23
DE236647T1 (de) 1988-01-14
DK164715B (da) 1992-08-03
NO865108L (no) 1987-06-19
CA1294499C (fr) 1992-01-21
DE3665214D1 (en) 1989-09-28
AU581160B2 (en) 1989-02-09
NO865108D0 (no) 1986-12-17
ES2000154B3 (es) 1989-11-01
NO162485B (no) 1989-09-25
FI865169A0 (fi) 1986-12-17
PT83940B (pt) 1993-02-26
ATE45794T1 (de) 1989-09-15
PT83940A (fr) 1987-01-01
US4736711A (en) 1988-04-12
YU46036B (sh) 1992-12-21
CN86108550A (zh) 1987-07-29
GR880300086T1 (en) 1988-12-16
IN169114B (de) 1991-09-07
FR2591722B1 (fr) 1988-02-19
NO162485C (no) 1990-01-03

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