EP0828970B1 - Verfahren und einrichtung zur abscheidung - Google Patents

Verfahren und einrichtung zur abscheidung Download PDF

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Publication number
EP0828970B1
EP0828970B1 EP96914005A EP96914005A EP0828970B1 EP 0828970 B1 EP0828970 B1 EP 0828970B1 EP 96914005 A EP96914005 A EP 96914005A EP 96914005 A EP96914005 A EP 96914005A EP 0828970 B1 EP0828970 B1 EP 0828970B1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
separation
wall
chamber
flue gas
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.)
Expired - Lifetime
Application number
EP96914005A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0828970A1 (de
Inventor
Bernd BRÄNDLE
Erich Fercher
Alfred Glasner
Georg Obwaller
Emmerich Seidelberger
Karl VOIGTLÄNDER
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.)
AE ENERGIETECHNIK GmbH
Original Assignee
AE Energietechnik 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
Application filed by AE Energietechnik GmbH filed Critical AE Energietechnik GmbH
Publication of EP0828970A1 publication Critical patent/EP0828970A1/de
Application granted granted Critical
Publication of EP0828970B1 publication Critical patent/EP0828970B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F22B31/0084—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
    • 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
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00—Furnace arrangements
    • F23G2203/50—Fluidised bed furnace
    • F23G2203/501—Fluidised bed furnace with external recirculation of entrained bed material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/20—Intercepting solids by baffles

Definitions

  • the invention relates to a method for separating the bed material and for using the heat the flue gas of an incineration plant based on the principle of a circulating fluidized bed in the heating surfaces downstream of the incinerator, in which the fluidized bed rising flue gas flow with the carried solids after the cooled by riser pipes Combustion chamber in a shaft in the direction of gravity and at the end of the shaft after one Separation of the solids with a deflection against the direction of gravity extended shaft cross-section is guided, and an incinerator for carrying out the Procedure.
  • JP-A-1184301 and WO 90/05020 disclose fluidized bed combustion plants according to the Principle of the circulating fluidized bed, in which coarse and fine dust is deposited together and this dust mixture is treated differently according to its grain size. Heated downpipes are not disclosed.
  • the invention has set itself the task of heat transfer in the heating surfaces after Improve the combustion chamber by increasing the dust radiation and the separation system in the cooled part of the steam boiler construction is integrated. This will reduce the size same heat output reduced and the heat loss partly due to surface reduction and in part by integrating the separator into the cooling circuit of the steam generator downsized so that the efficiency is also improved.
  • the simple structure of the The separator can be easily made from fin tube walls.
  • the Construction according to the invention by the execution in steel construction and by the reduced Mass, especially the insulation, a reduction in start-up times.
  • the invention The design enables the cooled version of the to be carried out in an economical and simple manner Separation chamber and the bed return.
  • the inclusion of the separator, or its wall, in the pipe wall construction also increases the strength of the boiler body and thus the Overall construction.
  • the method is characterized in that only the coarser one is used to maintain the bed inventory Solid content burned off during the deflection and is returned down into the combustion chamber and the flue gas with the remaining dust on the downstream heating surfaces due to radiation and convection heat emits and the downpipes arranged in the rear wall of the separating device are heated.
  • the incinerator for performing the method is characterized in that the Rear wall of the separating and return device is formed as part of the downpipe system and is bent to form a separation chamber with a funnel-shaped lower part, the Separation chamber next to the upper part of the combustion chamber in the form of a flue gas deflector is provided, to which a collecting shaft for the return of the bed material is connected is and the combustion chamber and separation chamber have side walls which are part of the Riser pipe system are formed, which opens into a steam drum that on a Standpipe group is arranged and is connected to the boiler body in the region of the front wall.
  • Embodiments of the invention are specified in subclaims 3 to 9.
  • the method is illustrated by the figures connected to an incinerator according to the invention represent exemplary and schematic for performing the method. Show it Fig. 1 and Fig. 2 each in plan and elevation of a possible embodiment.
  • Fig. 1 shows the upper part of a combustion chamber 1 of a steam generator with a deflection wall 14.
  • Die Combustion chamber 1 with the front wall 3, intermediate wall 4, the side walls 5 and 6 and the rear wall 7 form the boiler body as a static unit.
  • the angled deflection wall 14 forms the Part of the combustion chamber ceiling and divides the separation chamber 2 into two parts, one after the other Exhaust gas flowing through the combustion chamber 1.
  • the Front wall 3 or the two side walls 5 and 6 can be connected as an intermediate wall Deflection wall 14 are formed, whereby the fluidized bed properties even further improve.
  • the deflection wall 14 and its lower header 12 are at least on the inflow side equipped with a wear layer 15, while the rear of the deflection wall 14 and all others Boundary walls of the separation chamber 2 covered with a thin wear layer or better heat absorption are left blank.
  • the separation chamber 2 is from the rear wall 7, Parts of the side walls 5 and 6 and the intermediate wall 4 are formed.
  • the weakly heated back wall 7 is designed as part of the downpipe system and serves to supply cooling water to the riser system, which is essentially formed by the walls of the combustion chamber 1, with the Deflection wall 14 is integrated in the riser pipe system.
  • the fin tubes of the deflection wall 14 are fed by own collectors 12, which through the downpipe system with the steam drum 16 are connected. Masonry partitions are thus avoided.
  • the combustion is based on the principle of the circulating fluidized bed carried out, in which the resulting flue gas bed material, such as Ash, sand and fuel, discharges upwards from the combustion chamber 1.
  • the resulting flue gas bed material such as Ash, sand and fuel
  • the resulting flue gas bed material discharges upwards from the combustion chamber 1.
  • the coarser solids content with the Arrangement of a deflection wall 14 according to the invention separated from the flue gas and again the Combustion chamber 1 supplied.
  • the path of the bed material is shown by dashed arrows and the path of the flue gas indicated by solid line arrows.
  • the solid content is due to its much higher density compared to the flue gas in the Deflection over the upper edge 13 of the intermediate wall 4 by the centrifugal force to the outside and at second deflection in the region of the lower end of the deflection wall 14 downwards in the direction of the Return device 9 pushed and thus separated from the flue gas stream.
  • the on the Deflection wall 14 braked or deflected mainly larger solid particles fall into the separation chamber 2 by the upward deflected flue gas stream and become Part by the flow rate on the bent towards the return device 9 Rear wall 7 deflected and the collecting shaft 11 or a storage space 10 and fed back to the feedback device 9.
  • the separation chamber 2 is designed so that the larger solid parts due to the higher inertia forces the sharp 180 ° deflection of the flue gas flow and cannot take part in the reduction in the flue gas velocity.
  • Finer particles which are deflected and discharged through the flue gas into the second train contribute to the heat exchange in the downstream heating surfaces. Because of the Small grain diameter of the finer material does not occur in the downstream heating surfaces Erosion.
  • the separated material is transferred via a siphon-like return device 9, as in FIG. 1 shown, or returned via an L-valve or an overflow weir. In most cases it comes but with a simple return device 9, z. B. an inclined plane, as in Fig. 2nd shown, so that no special sealing is necessary.
  • the feedback device 9 Conveniently opens out, as indicated in the two figures, at about half the combustion chamber height the combustion chamber 1, the bed material through the downward wall flow into the actual fluidized bed is returned. In the case of the upper, direct material return without Sealing, as in Fig. 2, the separated material slips freely into the combustion chamber 1 and falls along the intermediate wall 4 in the lower part of the combustion chamber.
  • the return device 9 can also only in the vicinity of the combustion chamber floor be arranged where the bed material over a suitable sealing member to prevent Bypas flows from the combustion chamber 1 through the separation chamber 2 into the combustion chamber 1 is returned.
  • both the combustion chamber 1 and the Separation chamber 2 are rectangular or square.
  • the integration of the Deflection wall 14 in the boiler construction thus also increases the strength of the overall unit.
  • these components can be made using the same methods as all the others Walls are made and can also be easily integrated into the boiler body. This design enables the cooled design of the separator and the Return of bed material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Physical Vapour Deposition (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • External Artificial Organs (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP96914005A 1995-06-02 1996-05-31 Verfahren und einrichtung zur abscheidung Expired - Lifetime EP0828970B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT94395 1995-06-02
AT9439/55 1995-06-02
AT943955 1995-06-02
PCT/AT1996/000100 WO1996038689A1 (de) 1995-06-02 1996-05-31 Verfahren und einrichtung zur abscheidung

Publications (2)

Publication Number Publication Date
EP0828970A1 EP0828970A1 (de) 1998-03-18
EP0828970B1 true EP0828970B1 (de) 2000-04-26

Family

ID=3503410

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96914005A Expired - Lifetime EP0828970B1 (de) 1995-06-02 1996-05-31 Verfahren und einrichtung zur abscheidung

Country Status (9)

Country Link
EP (1) EP0828970B1 (sk)
AT (1) ATE192223T1 (sk)
AU (1) AU5755096A (sk)
CZ (1) CZ292939B6 (sk)
DE (1) DE59605060D1 (sk)
DK (1) DK0828970T3 (sk)
PL (1) PL179911B1 (sk)
SK (1) SK282507B6 (sk)
WO (1) WO1996038689A1 (sk)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19604565A1 (de) * 1996-02-08 1997-08-14 Abb Patent Gmbh Trennvorrichtung zum Abscheiden von Feststoffpartikeln aus dem Gasstrom einer Wirbelschicht
FR2880102B1 (fr) * 2004-12-28 2007-05-04 Thel Etb Sarl Dispositif de combustion de biomasse a lit fluidise
CN103574591B (zh) * 2013-11-27 2016-03-30 陈洁 一种双炉体式旋转烧炉
FI130171B (fi) * 2020-12-09 2023-03-27 Sumitomo SHI FW Energia Oy Kiertoleijupetikattila

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3440583A1 (de) * 1984-11-07 1986-05-07 Buderus Ag, 6330 Wetzlar Dampf- oder heisswassererzeuger
JPH01184301A (ja) * 1988-01-19 1989-07-24 Mitsubishi Heavy Ind Ltd 循環流動床ボイラ
DK633488D0 (da) * 1988-11-11 1988-11-11 Risoe Forskningscenter Reaktor
JP2835895B2 (ja) * 1992-04-17 1998-12-14 株式会社荏原製作所 分割型流動床水管ボイラ

Also Published As

Publication number Publication date
PL323670A1 (en) 1998-04-14
EP0828970A1 (de) 1998-03-18
SK162497A3 (en) 1998-05-06
DE59605060D1 (de) 2000-05-31
PL179911B1 (pl) 2000-11-30
SK282507B6 (sk) 2002-10-08
AU5755096A (en) 1996-12-18
CZ292939B6 (cs) 2004-01-14
CZ9703740A3 (cs) 2001-10-17
DK0828970T3 (da) 2000-09-25
ATE192223T1 (de) 2000-05-15
WO1996038689A1 (de) 1996-12-05

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