WO2007135240A2 - Circuit d'eau d'alimentation de chaudière dans un réacteur à lit fluidisé et réacteur à lit fluidisé - Google Patents

Circuit d'eau d'alimentation de chaudière dans un réacteur à lit fluidisé et réacteur à lit fluidisé Download PDF

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Publication number
WO2007135240A2
WO2007135240A2 PCT/FI2007/050285 FI2007050285W WO2007135240A2 WO 2007135240 A2 WO2007135240 A2 WO 2007135240A2 FI 2007050285 W FI2007050285 W FI 2007050285W WO 2007135240 A2 WO2007135240 A2 WO 2007135240A2
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WO
WIPO (PCT)
Prior art keywords
boiler
grid
front wall
tubes
water
Prior art date
Application number
PCT/FI2007/050285
Other languages
English (en)
Other versions
WO2007135240A3 (fr
Inventor
Pentti Lankinen
Original Assignee
Foster Wheeler Energia Oy
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 Foster Wheeler Energia Oy filed Critical Foster Wheeler Energia Oy
Priority to AU2007253232A priority Critical patent/AU2007253232B2/en
Priority to KR1020087028271A priority patent/KR101165297B1/ko
Priority to US12/301,498 priority patent/US20100012050A1/en
Priority to PL07730772T priority patent/PL2021692T3/pl
Priority to JP2009510485A priority patent/JP4920082B2/ja
Priority to EP07730772A priority patent/EP2021692B1/fr
Publication of WO2007135240A2 publication Critical patent/WO2007135240A2/fr
Publication of WO2007135240A3 publication Critical patent/WO2007135240A3/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/62—Component parts or details of steam boilers specially adapted for steam boilers of forced-flow type
    • F22B37/70—Arrangements for distributing water into water tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • F22B29/061—Construction of tube walls
    • F22B29/062—Construction of tube walls involving vertically-disposed water tubes
    • 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
    • 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
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/14—Supply mains, e.g. rising mains, down-comers, in connection with water tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/14—Supply mains, e.g. rising mains, down-comers, in connection with water tubes
    • F22B37/141—Supply mains, e.g. rising mains, down-comers, in connection with water tubes involving vertically-disposed water tubes, e.g. walls built-up from vertical tubes
    • 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
    • F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms

Definitions

  • the present invention relates to a boiler water cycle of a fluidized bed boiler (FB boiler) and to a fluidized bed boiler having such a boiler water cycle in accordance with the introductory part of claim 1.
  • the invention especially relates to a boiler water cycle of a 400 MW e supercritical circulating fluidized bed boiler (CFB) operating on a once-through principle.
  • CFB supercritical circulating fluidized bed boiler
  • evaporation i.e. boiling
  • the water to be evaporated is mostly led either from the steam drum of a drum boiler or from the preheating surfaces for water in a once-through utility boiler to the lower part of the boiler by one or more drop legs.
  • the drop leg is usually connected to a number of inlet ducts, by means of which water is introduced to inlet headers arranged be- low the furnace, which inlet headers have a length corresponding to the width of the furnace walls.
  • Water tubes in the water tube panels of the outer walls of the furnace in turn are connected to the inlet headers to heat up and evaporate water in the water tubes.
  • the water tubes of the outer walls are connected from the upper end to outlet headers and pipings, by means of which steam is led further to water separation and super heating.
  • the drop leg is usually connected to a large number of inlet ducts, which are connected from one end approximately at equal intervals to the whole length of the inlet headers.
  • US 4,183,330 discloses an example of an FB boiler, having a number of inlet lines connecting drop legs of a steam drum to an annular inlet header introducing water to the wall tubes of the furnace.
  • the drop leg may be substantially vertical, whereby it generally ends to the outside of the bottom level of the boiler or the lower part thereof may be turned to horizontal, being then able to extend as such below one of the boiler walls.
  • the inlet ducts of the inlet header being connected to the wall may be relatively short.
  • they may preferably extend below the longer sidewalls, in other words the front wall and the rear wall, or alternatively below the shorter sidewalls thereof.
  • the boiler water cycle becomes especially complicated when the bottom grid of the furnace is also cooled by evaporation tubes and due to the large size of the grid, it is advantageous, and in drum boilers even necessary, to locate one or more inlet headers to run in the longitudinal direction below the centre part of the grid.
  • the arrangement of inlet ducts of a so called grid chamber is problematic, because also an inlet chamber for fluidizing air, a so called wind box must be arranged in the fluidized bed boiler below the grid. If the wind box is desired to be arranged as one large, undivided construction, which is advantageous in view of homo- geneous air distribution, the grid chamber should generally be located inside the wind box. Thereby, the numerous inlet ducts must be led through the wind box.
  • An object of the present invention is to provide a boiler water cycle of a fluidized bed boiler, which diminishes problems related to boiler water cycles of a fluidized bed boiler in accor- dance with the prior art.
  • an object of the invention is to provide a simple and reliable boiler water cycle of a supercritical circulating fluidized bed boiler operating on a once-through principle.
  • a further object of the invention is to provide a fluidized bed boiler having such a boiler water cycle.
  • a boiler water cycle of a fluidized bed boiler in accordance with the present invention comprises a drop leg and a number of horizontal inlet headers, substantially of the length of a front wall of the boiler furnace, arranged below the furnace of the fluidized bed boiler, panels of water tubes of the front wall and of a rear wall, the extensions of the water tubes being directly connected to the inlet headers and each inlet header being in flow communication with the drop leg merely by means of an inlet duct connected to the end of the inlet header.
  • the furnace of the fluidized bed boiler is usually of the horizontal cross-section rectangular and the front wall and the rear wall of the furnace usually refer to longer walls of the furnace.
  • the shorter side walls of the furnace may preferably also be cooled in accordance with the present invention, but it is possible that the feed of water to the shorter walls of the furnace is carried out in a conventional way by utilizing a number of inlet ducts.
  • each inlet header is in flow communication with the drop leg according to the present invention, preferably only with one drop leg, merely by means of an inlet duct connected to the end of the inlet header, the complexity caused by numerous inlet ducts is avoided.
  • Connecting to the end of the inlet header refers in this connection either to an inlet duct being connected parallel to the inlet header right to the end thereof or the inlet duct being connected to the side wall of the inlet header, but substantially to the first end thereof.
  • the ar- rangement in accordance with the invention is especially advantageous in large circulating fluidized bed boilers, in which it is desired to form an undivided wind box enabling a homogenous flow of fluidizing gas. The manufacture of such is severely hampered by numerous inlet lines of the prior art.
  • the inner diameters of the inlet headers must be large enough to be able to ensure sufficient boiler water flow also to the far end of the inlet header.
  • the required size of the inlet headers depends thus on the amount of water to be fed, but according to a preferred embodiment, the inner diameter of the inlet headers is at least 200mm, most preferably at least 300 mm. Large inlet headers as such increase costs, but the inventor of the present invention has surprisingly noticed that with large FB boilers, especially with supercritical once-through CFB boilers, the power output of which is at least 400 MW e , it is advantageous to use the above described, very simple arrangement for inlet headers for boiler water.
  • the inlet headers comprise a front wall chamber arranged below the front wall of the furnace, a rear wall chamber arranged below the rear wall of the furnace and at least one, so called grid chamber below the centre part of the furnace grid.
  • a first portion of the extensions of the water tubes in the front wall of the furnace is connected directly to the front wall chamber and, correspondingly, a first portion of the extensions of the water tubes in the rear wall of the furnace is connected directly to the rear wall chamber.
  • not all of the water tubes of the water tube panel of the front wall and the rear wall are connected to the above mentioned front wall chamber and the rear wall chamber, but a second portion of the water tubes of the front wall and of the rear wall ex- tend as grid tubes parallel to the furnace grid to the grid chamber.
  • the grid chambers are preferably arranged below the furnace grid, inside the wind box.
  • each grid tube is preferably connected by means of a special fitting member to a water tube of the above-mentioned second portion of the water tubes in the front wall or the rear wall.
  • the second portion of the extensions of the water tubes in the front wall are preferably connected to the first grid chamber and the second portion of the extensions of the water tubes in the rear wall are connected to the second grid chamber.
  • the water tubes of the first and second portion preferably alternate in the front wall and the rear wall, whereby, for example, every second water tube of the front wall is in connection with the front wall chamber and the rest of them are in connection with the first grid chamber.
  • a significant additional advantage of the large inlet headers is that they can be arranged as support structures of the lower part of the furnace, whereby they decrease the number of other supporting structures. Especially in large FB boilers, it is possible to simplify the support of the centre part of the grid, when a large grid chamber in accordance with a preferred embodiment of the present invention forms a part thereof.
  • FIG. 1 schematically illustrates a side view of a circulating fluidized bed boiler, comprising a boiler water cycle in accordance with a preferred embodiment of the present invention
  • Fig. 2 schematically illustrates a vertical sectional view of a lower part of a circulating fluidized bed boiler, comprising a boiler water cycle in accordance with a preferred embodiment of the present invention
  • Fig. 3 schematically illustrates a detail of a lower part of boiler water tubes of a circulating fluidized bed boiler in accordance with a preferred embodiment of the present invention.
  • Fig. 1 illustrates a CFB boiler 10 in accordance with a preferred embodiment of the present invention, comprising a furnace 12.
  • the boiler in accordance with the invention may be a natural circulation boiler, in other words, a drum boiler, but it is most preferably a supercritical once-through utility boiler, which is illustrated, for example, in Fig. 1.
  • the horizontal cross-section of the furnace is usually rectangular, and it is limited by a bottom, a ceiling and sidewalls, of which one long sidewall, a so-called front wall 14, is shown in the Figure.
  • the walls limiting the furnace are conventionally manufactured as a water tube wall construction, in other words from water tubes 16 and fins connected gas tight therebetween.
  • the water tubes and fins form water tube panels 18, which are used for boiling water, i.e., for converting preheated feed water to steam.
  • a so-called wind box 20 is arranged below the furnace for supplying primary gas, generally air, required for the combustion of fuel and for the fluidization of the fluidized bed, to the furnace.
  • primary gas generally air
  • Other conventional parts of the CFB boiler such as fuel inlet means, discharge channels for flue gases and bottom ash as well as particle separators and return ducts related thereto are also connected to the furnace.
  • fuel inlet means such as fuel inlet means, discharge channels for flue gases and bottom ash as well as particle separators and return ducts related thereto are also connected to the furnace.
  • particle separators and return ducts related thereto are also connected to the furnace.
  • the preheated feed water 22 led from the water preheating surfaces, so called economizers, and the possible liquid returned from the steam separator 24 are led by means of a drop leg 26 to the level of the furnace bottom, from where it is distributed by means of inlet ducts 28 to the inlet headers 30 of the evaporator tubes in the sidewalls of the boiler.
  • inlet ducts 28 are connected, approximately equally spaced throughout the whole length of the inlet headers. It is, however, characteristic of the present invention that each inlet header 30 is in flow connection with a drop leg 26 merely by means of an inlet duct 28 connected to the end of the inlet header.
  • the diameter of the inlet headers 30 must naturally be sufficient, substantially greater than that in the prior art arrangement.
  • the inner diameter of the inlet headers in accordance with the invention is preferably at least 200 mm, most preferably at least 300 mm.
  • the structure of the inlet pipings in accordance with the invention is very simple, and it does not disturb the location of the apparatuses connected to the lower part of the furnace nor, for example, the formation of an extensive, undivided wind box 20.
  • the water from inlet headers 30 is led to the water tube panels 18 to evaporate and further as steam to the outlet headers 32.
  • the boiler is a so-called drum boiler
  • the force driving water and steam upwards in the panels is the weight of the liquid column in the drop leg of the drum.
  • the boiler is a so-called forced circulation boiler, especially a so-called supercritical once-through boiler, the driving force is the pressure generated by the pump of the water cycle (not shown in Fig. 1 ).
  • the steam from the outlet headers 32 possibly still containing some liquid water, is led to the water and steam separating apparatus 24 by means of collector tubes 34.
  • the steam continues further in the steam pipings 36 to the superheaters arranged, for example, in the flue gas channel.
  • Fig. 2 schematically illustrates a simplified vertical cross-section of a lower part of the furnace 12 of a fluidized bed boiler having a water cycle in accordance with a preferred embodiment of the present invention.
  • Fig. 2 shows a front wall 14 and a rear wall 38, which are formed of water tube panels of the furnace 12, as well as a wind box 20.
  • Fig. 2 also schematically illustrates the wind box 20 with fluidizing gas nozzles 40 which are arranged between the grid tubes 42.
  • Extensions 44, 46 of the first portion of the water tubes in the front wall 14 and the rear wall 38 are connected directly to a front wall chamber 48 and a rear wall chamber 50, respectively.
  • the front wall chamber 48 and the rear wall chamber 50 are both connected in a manner shown in Fig. 1 to a drop leg merely by means of an inlet duct connected to the end of the chamber. Since thereby there are no other inlet ducts connected to the inlet headers, in accordance with the present invention, each cross-section of the furnace 12 is simple in that there are no inlet ducts of the inlet headers hampering the connection of other apparatuses to the lower part of the furnace 12.
  • Grid tubes 42 are connected to the grid chambers, each of which is preferably connected to a water tube of the front wall 14 or the rear wall 38 in a manner disclosed below. Since the grid chambers 52, 54, too, are connected in a manner illustrated in Fig. 1 to the drop leg merely by means of an inlet duct connected to the end of the chamber, there are no inlet ducts connected to the centre part of the grid chambers 52, 54 which would hamper the formation of an undivided wind box.
  • the grid chambers 52, 54 extending throughout the length of the boiler walls also significantly reinforce the grid structure and thus diminish the need for other supporting structures.
  • Fig. 3 schematically illustrates a detail of a lower part of the boiler water tubes in a circulating fluidized bed boiler in accordance with a preferred embodiment of the present invention.
  • This drawing shows a front wall chamber 48, a first grid chamber 52 and the water tubes connected thereto.
  • the drawing could also illustrate correspondingly water tubes connected to a rear wall chamber and a second grid chamber.
  • the grid tubes are preferably arranged longitudinally at the centre part of the grid cross-section, and the length of the substantially horizontal portion of the grid tubes 42 parallel to the grid is thus approximately half of the whole width of the grid.
  • the grid tubes 42 connected to the first grid chamber 52 run from the grid chamber first to a certain extent upwards and then turn parallel to the grid towards the front wall 14, where they again turn upwards. Since the diameter of the grid tubes is preferably greater than the diameter of the water tubes 54, 54' of the furnace wall, the grid tubes are preferably con- nected by fitting members 56 to the water tubes 54' of the furnace wall.
  • every second of the tubes of the furnace wall belongs to the so called first portion 54 of the water tubes, the extensions 44 thereof being connected directly to the front wall chamber 48 and the rest of the tubes belong to a so called second portion 54', which is connected by means of fitting members 56 to the grid tubes 42 and therethrough to the first grid chamber 52.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Abstract

Circuit d'eau d'alimentation de chaudière dans une chaudière à lit fluidisé, et chaudière à lit fluidisée, de préférence du type supercritique à un seul passage (OTU: once-through unit), dotée d'un circuit d'eau de chaudière, comprenant une colonne barométrique et un certain nombre de collecteurs d'admission horizontaux d'une longueur correspondant sensiblement à celle de la paroi avant du foyer de la chaudière, disposés sous le foyer de la chaudière à lit fluidisé, le diamètre interne des collecteurs d'admission étant de préférence d'au moins 200 mm. Les prolongements des tubes d'eau de la paroi avant et de la paroi arrière du foyer sont raccordés directement auxdits collecteurs d'admission, et chacun des collecteurs d'entrée communique avec la colonne barométrique uniquement par l'intermédiaire d'un conduit d'entrée couplé à l'extrémité du collecteur d'admission. Les collecteurs d'admission comprennent de préférence un compartiment de paroi avant et un compartiment de paroi arrière disposés respectivement sous la paroi avant et la paroi arrière du foyer, et un compartiment de grille disposé sous la partie médiane de la grille, de préférence à l'intérieur d'une boîte à vent. Une première partie des prolongements des tubes d'eau de la paroi avant et de paroi arrière sont de préférence couplés directement au compartiment de paroi avant et au compartiment de paroi arrière respectivement, et une seconde partie des tubes d'eau de la paroi avant et de la paroi arrière se prolongent pour forment des tubes de grille parallèles à la grille du foyer, et sont reliés au compartiment de grille.
PCT/FI2007/050285 2006-05-19 2007-05-21 Circuit d'eau d'alimentation de chaudière dans un réacteur à lit fluidisé et réacteur à lit fluidisé WO2007135240A2 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU2007253232A AU2007253232B2 (en) 2006-05-19 2007-05-21 Boiler water cycle of a fluidized bed reactor and a fluidized bed reactor with such boiler water cycle
KR1020087028271A KR101165297B1 (ko) 2006-05-19 2007-05-21 유동층 반응기의 보일러 물 사이클과 이러한 보일러 물 사이클을 갖는 유동층 반응기
US12/301,498 US20100012050A1 (en) 2006-05-19 2007-05-21 Boiler Water Cycle of a Fluidized Bed Reactor and a Fluidized Bed Reactor
PL07730772T PL2021692T3 (pl) 2006-05-19 2007-05-21 Obieg wody w kotle reaktora ze złożem fluidalnym i reaktor ze złożem fluidalnym z takim obiegiem wody w kotle
JP2009510485A JP4920082B2 (ja) 2006-05-19 2007-05-21 流動床反応器のボイラー水サイクル及びそのようなボイラー水サイクルを有する流動床反応器
EP07730772A EP2021692B1 (fr) 2006-05-19 2007-05-21 Circuit d'eau dans un réacteur à lit fluidisé et réacteur à lit fluidisé muni d'un tel circuit d'eau

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20060494 2006-05-19
FI20060494A FI121826B (fi) 2006-05-19 2006-05-19 Leijupetikattilan keittovesipiiri

Publications (2)

Publication Number Publication Date
WO2007135240A2 true WO2007135240A2 (fr) 2007-11-29
WO2007135240A3 WO2007135240A3 (fr) 2008-03-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2007/050285 WO2007135240A2 (fr) 2006-05-19 2007-05-21 Circuit d'eau d'alimentation de chaudière dans un réacteur à lit fluidisé et réacteur à lit fluidisé

Country Status (11)

Country Link
US (1) US20100012050A1 (fr)
EP (1) EP2021692B1 (fr)
JP (1) JP4920082B2 (fr)
KR (1) KR101165297B1 (fr)
CN (1) CN101449101A (fr)
AU (1) AU2007253232B2 (fr)
FI (1) FI121826B (fr)
PL (1) PL2021692T3 (fr)
RU (1) RU2396486C1 (fr)
WO (1) WO2007135240A2 (fr)
ZA (1) ZA200808398B (fr)

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CN101761923A (zh) * 2010-03-02 2010-06-30 上海锅炉厂有限公司 一种锅炉布风板
DE102015217228A1 (de) 2015-09-09 2017-03-09 Thyssenkrupp Ag Kühler zum Kühlen von heißem Schüttgut
RU185159U1 (ru) * 2018-08-21 2018-11-22 Павел Александрович Кравченко Паровой котел с топкой взвешенного слоя (твс)
DE102018215406A1 (de) 2018-09-11 2020-03-12 Thyssenkrupp Ag Kühler zum Kühlen von heißem Schüttgut
BE1027674B1 (de) 2019-10-14 2021-05-10 Thyssenkrupp Ind Solutions Ag Kühler zum Kühlen von Schüttgut mit einer Stufe
BE1027670B1 (de) 2019-10-14 2021-05-12 Thyssenkrupp Ind Solutions Ag Kühler zum Kühlen von Schüttgut

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US3665893A (en) * 1970-12-29 1972-05-30 Babcock & Wilcox Co Vapor generator tube arrangement
US3863606A (en) * 1973-07-25 1975-02-04 Us Environment Vapor generating system utilizing fluidized beds
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EP2021692A2 (fr) 2009-02-11
US20100012050A1 (en) 2010-01-21
EP2021692B1 (fr) 2012-12-19
CN101449101A (zh) 2009-06-03
RU2396486C1 (ru) 2010-08-10
FI20060494A (fi) 2007-11-20
KR101165297B1 (ko) 2012-07-23
KR20080113288A (ko) 2008-12-29
FI20060494A0 (fi) 2006-05-19
ZA200808398B (en) 2009-07-29
JP4920082B2 (ja) 2012-04-18
AU2007253232A1 (en) 2007-11-29
JP2009537782A (ja) 2009-10-29
FI121826B (fi) 2011-04-29
PL2021692T3 (pl) 2013-11-29
AU2007253232B2 (en) 2010-09-09
WO2007135240A3 (fr) 2008-03-13

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