WO2006114551A1 - Double extension de paroi - Google Patents
Double extension de paroi Download PDFInfo
- Publication number
- WO2006114551A1 WO2006114551A1 PCT/FR2006/050389 FR2006050389W WO2006114551A1 WO 2006114551 A1 WO2006114551 A1 WO 2006114551A1 FR 2006050389 W FR2006050389 W FR 2006050389W WO 2006114551 A1 WO2006114551 A1 WO 2006114551A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluidized bed
- bed reactor
- extension panels
- walls
- tubes
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
- F22B21/02—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
- F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
-
- 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
-
- 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
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
Definitions
- the present invention relates to fluidized bed reactors such as boiler fireplaces. These reactors comprise a focus generally consisting of diaphragm cased walls cooled by a coolant such as a water / steam mixture.
- the section of the hearth that can be rectangular is determined by the upward velocity of the flue gases for proper operation.
- the perimeter of the hearth being fixed, the flow rate of the coolant circulating in the wall tubes will be determined according to the diameter and the pitch chosen for said tubes.
- the height of the hearth makes it possible to obtain the heat exchange surface of the four walls, however this height must be optimized in order to reduce the height and therefore the cost of the installation, but also so that the required residence time the chemical reactions between the particles can take place inside the home.
- the section of the hearth gives a perimeter which may be insufficient to install in the walls the parallel tubes necessary to circulate the flow of heat transfer fluid.
- the need for heat exchange may require the installation of additional exchange surfaces in the home.
- Another solution could be to increase the height of the fireplace to increase the exchange surface of the walls without adding internal extensions but this solution is expensive because the entire height of the installation is increased.
- the present invention proposes to solve at a lower cost and without increasing the height of the installation the problem of the insufficiency of the exchange surfaces in the hearth.
- the fluidized-bed reactor according to the invention consists of diaphragm-walled walls cooled by a heat-transfer fluid, these walls surrounding a hearth and comprising panels of cased extensions traversed by a heat-transfer fluid in single-pass forced circulation according to the invention. the extension panels are paired together.
- the coolant fluid that circulates in the tubes of the walls and cased extensions balances the heat flow received from the fluidized bed circulating in the home.
- the circulation is mono pass, that is to say that all the tubes of the hearth and extensions are traversed in parallel.
- the single-pass circulation avoids long connecting pipes between the extension panels and the walls of the fireplace (in the upper part for the exit of the panels and in the lower part for the entrance of the walls of the fireplace). All that remains is that supply pipes at the bottom and clearance at the top for the panels and walls of the fireplace. Thanks to the invention, only one face of each extension is heated by the fluidized bed circulating in the hearth, which allows a flow reduced heat transfer fluid because the second face of each of the extension panels thus paired is not in contact with the ashes and hot gases constituting the fluidized bed circulating in the home which avoids heat transfer modes damaging to the mechanical strength of the tubes. On the other hand, doubling the number of tubes of each extension panel increases the passage section of the coolant flowing in these extensions relative to simple extensions and increases the exchange surface. These double wall extensions have better mechanical strength, it is possible to give them larger size.
- the extension panels are attached to the walls of the reactor. This makes it possible to improve the rigidity and to minimize the deformations of the panels which could give rise to erosions by solids descending in a layer along the walls.
- the expansion panels leave the top of the reactor and at most on a height equal to 75% of the height of the hearth. Because it is in the upper zone of the hearth that the temperature is the highest and that the risks of erosion are the weakest since the solids concentrations decrease according to the height and that the gaseous atmosphere in the upper part of the hearth is fully oxidizing.
- the bottom of the hearth is in the form of split hearth said "pant leg". This shape allows the introduction of combustion air into the central area of the fireplace to distribute this air over the entire section of the fireplace.
- the coolant is in the liquid phase and / or gaseous depending on the thermal load of operation of the boiler.
- the fluid is liquid in low charge and gaseous in high load.
- the coolant is water.
- the extension panels form enclosures having openings. These openings make it possible to avoid the rise in pressure inside the enclosure in the event of leakage of the heat transfer fluid from the tubes.
- the extension panels are placed at least partly in the dense layer of solids. Because it is in this area of high concentration of solids that heat exchange is the highest.
- the tubes constituting the extension panels are of different dimensions from those of the wall tubes.
- the pitch between two tubes constituting the extension panels is fixed. This simplifies the manufacture of the panels.
- the pitch between two tubes constituting the extension panels is variable. This makes it possible to optimize the thermodynamic behavior of said panels and not to exceed the temperature thresholds of the metal.
- the distance between two panels of twin extensions is equal to the pitch between two tubes of the fireplace screen wall. The manufacture of the assembly is thus simplified.
- the tubes of the extension panels are traversed in heat transfer fluid in series with the peripheral walls. This choice depends on the steam cycles and the thermal powers to be exchanged in the extension panels.
- the extension panels are arranged on partition walls that divide the fireplace. This makes it possible to increase the number of extension panels and thus to increase the number of exchange surfaces at a lower cost.
- the partition walls start from the top of the reactor and at most over a height equal to 75% of the height of the hearth.
- partition double walls may be spaced apart or close type according to the access requirements for maintenance between the walls.
- FIGS. 1, 2, 3 and 4 show horizontal sectional views of reactors equipped with extension panels according to the invention
- FIGS. 5a to 5t are horizontal sectional views which illustrate various forms of panels of possible extensions
- FIG. 6 is a horizontal sectional view of double extension panels on a double partition wall of close type
- FIG. 7 is a horizontal sectional view of double panels of extensions on a double partition wall of separated type
- FIG. 8 is a horizontal sectional view of an example of a hearth comprising two partition double walls and double extension panels on the peripheral walls and partition walls,
- FIG. 9 is a vertical sectional view of a double extension
- FIG. 10 is a horizontal sectional view of a double extension
- FIGS. 12a to 12c are perspective views of examples of the installation of double partition walls
- FIG. 13 is a vertical sectional view of an example of the installation of double partition walls
- FIGS. 14a to 141 are examples of different positions of the inlet and outlet manifolds for the partition double walls.
- FIGS. 1 to 4 show a fluidized-bed reactor 1 consisting of diaphragm walls 2 with membranes cooled by a heat-transfer fluid surrounding a combustion chamber 10.
- the walls 2 comprise cased extensions 3.
- the wall 1 1 comprises openings 5 which communicate with cyclones (not shown). These extensions may be arranged perpendicular to the wall 1 1 as in Figure 1 or parallel to the wall 1 1 as in Figure 2 or be partition walls 4 of the fireplace 10 as in Figure 3 where the fireplace 1 0 is divided in three and Figure 3a where the focus is divided into two. In FIG. 4, the focus 1 0 is divided into 6.
- Figures 5 show the different types of extension panels possible. This set of figures illustrates the variety of possible constructions which depends on the requirements of exchange surface and thermodynamic resistance criteria which themselves are a function of the conditions of the gaseous liquid cycle or steam water.
- Figures 5u to 5t have a single end tube to reduce the heat flow received by the tube and the end fin.
- FIG. 6 shows the detail of a partition wall 4 of close type on which extension panels 3 have been arranged.
- Figs. 7 and 8 show a partition wall 4a of spaced apart type on which extension panels 3 have been arranged.
- Fig. 7 shows the detail of the wall 4a.
- the extension panel 3 is fed by a distribution circuit 30, it is composed of tubes 31 which are held spaced by a notched vane sealing 32.
- the fluid coolant flows in the tubes 31 of the inlet manifold 33 to the outlet manifold 34 (see Figure 9).
- the extension 3 shown in Figure 10 is seen from above in section. It consists of tubes 31.
- the double partition wall 4 can be arranged in different ways: either over the entire height as in Figure 1 1a, or only in the central portion as in Figure 1 1b, or to an intermediate height as on Figure 1 1 c, from the ceiling up to a height inter medi ⁇ ⁇ re as in Figure 1 1 d or Figure 12a. It is also possible to put several parallel partition walls 4 parallel as in Figures 12b and 13, or which are in I ntersection as in Figure 12c. It is thus possible to separate the focus 10 in several sub-points 10a. It is thus possible to obtain a focal point with 6 cyclones 5 and two parallel double partition walls 4 dividing the focal point 10 at 3 foci 10a each opening on 2 cyclones 5.
- Fig. 14 shows the various possible inlet and outlet manifold arrangements for double partition walls with walls of close-type (Figs. 14h-141) or spaced-apart (14a-14g).
- the choice of these different arrangements of collectors depends on the size of the partition walls and the optimization of the distribution of the coolant in these walls.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/918,293 US9175846B2 (en) | 2005-04-26 | 2006-04-26 | Double wall extension |
CN2006800141179A CN101166933B (zh) | 2005-04-26 | 2006-04-26 | 双倍延伸壁 |
ES06743846.5T ES2603405T3 (es) | 2005-04-26 | 2006-04-26 | Doble extensión de pared |
EP06743846.5A EP1875130B1 (fr) | 2005-04-26 | 2006-04-26 | Double extension de paroi |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0551070 | 2005-04-26 | ||
FR0551070A FR2884900B1 (fr) | 2005-04-26 | 2005-04-26 | Reacteur a lit fluidise avec double extension de paroi |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006114551A1 true WO2006114551A1 (fr) | 2006-11-02 |
Family
ID=35429265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2006/050389 WO2006114551A1 (fr) | 2005-04-26 | 2006-04-26 | Double extension de paroi |
Country Status (8)
Country | Link |
---|---|
US (1) | US9175846B2 (fr) |
EP (1) | EP1875130B1 (fr) |
KR (1) | KR100919754B1 (fr) |
CN (1) | CN101166933B (fr) |
ES (1) | ES2603405T3 (fr) |
FR (1) | FR2884900B1 (fr) |
PL (1) | PL1875130T3 (fr) |
WO (1) | WO2006114551A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE532301C2 (sv) * | 2008-04-23 | 2009-12-08 | Metso Power Ab | En ångpanna försedd med kyld anordning |
SE533545C2 (sv) * | 2009-04-24 | 2010-10-19 | Metso Power Ab | En panna försedd med kyld skärmvägg i rökgången |
FI124376B (fi) | 2010-01-15 | 2014-07-31 | Foster Wheeler Energia Oy | Höyrykattila |
WO2012021533A2 (fr) * | 2010-08-09 | 2012-02-16 | Naranjo Aldozkar D Herrera | Dispositif de chauffage d'un liquide et de génération de vapeur |
CN102466223B (zh) * | 2010-10-29 | 2014-08-20 | 中国科学院工程热物理研究所 | 一种循环流化床锅炉 |
ES2637364T3 (es) * | 2012-03-20 | 2017-10-13 | General Electric Technology Gmbh | Caldera de lecho fluidizado circulante |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1048832A (en) * | 1963-02-14 | 1966-11-23 | Davy & United Eng Co Ltd | Fluidised bed containers |
FR2712378A1 (fr) * | 1993-11-10 | 1995-05-19 | Stein Industrie | Réacteur à lit fluidisé circulant à extensions de surface d'échange thermique. |
FR2855593A1 (fr) * | 2003-05-28 | 2004-12-03 | Alstom Switzerland Ltd | Element d'installation de combustion dont les raidisseurs sont des echangeurs de chaleur. |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2072535A (en) * | 1931-11-21 | 1937-03-02 | Gasoline Prod Co Inc | Method of and radiant heat stills for distilling hydrocarbon oils |
US3130714A (en) * | 1961-05-18 | 1964-04-28 | Shell Oil Co | Tube furnace |
US4165717A (en) * | 1975-09-05 | 1979-08-28 | Metallgesellschaft Aktiengesellschaft | Process for burning carbonaceous materials |
DE2704975C2 (de) * | 1977-02-07 | 1982-12-23 | Wacker-Chemie GmbH, 8000 München | Wärmeaustauschvorrichtung für Wirbelbettreaktoren zur Durchführung von Gas/Feststoff-Reaktionen, insbesondere zur Herstellung von Siliciumhalogenverbindungen mittels Silicium-enthaltender Kontaktmassen |
DE4005305A1 (de) | 1990-02-20 | 1991-08-22 | Metallgesellschaft Ag | Wirbelschichtreaktor |
US5140950A (en) * | 1991-05-15 | 1992-08-25 | Foster Wheeler Energy Corporation | Fluidized bed combustion system and method having an integral recycle heat exchanger with recycle rate control and backflow sealing |
US5299532A (en) * | 1992-11-13 | 1994-04-05 | Foster Wheeler Energy Corporation | Fluidized bed combustion system and method having multiple furnace and recycle sections |
US5678497A (en) * | 1996-04-30 | 1997-10-21 | Foster Wheeler Energy International, Inc. | Apparatus for distributing secondary air into a large scale circulating fluidized bed |
US5836257A (en) | 1996-12-03 | 1998-11-17 | Mcdermott Technology, Inc. | Circulating fluidized bed furnace/reactor with an integral secondary air plenum |
FR2760829B1 (fr) * | 1997-03-13 | 1999-05-14 | Gec Alsthom Stein Ind | Echangeur a lit fluidise dense destine a etre associe a un reacteur a lit fluidise circulant |
FI105499B (fi) | 1998-11-20 | 2000-08-31 | Foster Wheeler Energia Oy | Menetelmä ja laite leijupetireaktorissa |
FR2837561B1 (fr) * | 2002-03-25 | 2004-05-21 | Alstom Switzerland Ltd | Foyer de chaudiere a lit fluidise comprenant deux soles separees par un entrejambe |
DE10254780B4 (de) | 2002-11-22 | 2005-08-18 | Alstom Power Boiler Gmbh | Durchlaufdampferzeuger mit zirkulierender atmosphärischer Wirbelschichtfeuerung |
KR200373290Y1 (ko) * | 2004-09-16 | 2005-01-14 | 최창호 | 지하실 이중벽용 패널 |
-
2005
- 2005-04-26 FR FR0551070A patent/FR2884900B1/fr not_active Expired - Fee Related
-
2006
- 2006-04-26 KR KR1020077027279A patent/KR100919754B1/ko active IP Right Grant
- 2006-04-26 ES ES06743846.5T patent/ES2603405T3/es active Active
- 2006-04-26 EP EP06743846.5A patent/EP1875130B1/fr not_active Revoked
- 2006-04-26 US US11/918,293 patent/US9175846B2/en not_active Expired - Fee Related
- 2006-04-26 CN CN2006800141179A patent/CN101166933B/zh not_active Expired - Fee Related
- 2006-04-26 WO PCT/FR2006/050389 patent/WO2006114551A1/fr not_active Application Discontinuation
- 2006-04-26 PL PL06743846T patent/PL1875130T3/pl unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1048832A (en) * | 1963-02-14 | 1966-11-23 | Davy & United Eng Co Ltd | Fluidised bed containers |
FR2712378A1 (fr) * | 1993-11-10 | 1995-05-19 | Stein Industrie | Réacteur à lit fluidisé circulant à extensions de surface d'échange thermique. |
FR2855593A1 (fr) * | 2003-05-28 | 2004-12-03 | Alstom Switzerland Ltd | Element d'installation de combustion dont les raidisseurs sont des echangeurs de chaleur. |
Also Published As
Publication number | Publication date |
---|---|
US20090084293A1 (en) | 2009-04-02 |
CN101166933A (zh) | 2008-04-23 |
US9175846B2 (en) | 2015-11-03 |
FR2884900A1 (fr) | 2006-10-27 |
EP1875130B1 (fr) | 2016-08-31 |
PL1875130T3 (pl) | 2017-03-31 |
CN101166933B (zh) | 2010-10-20 |
FR2884900B1 (fr) | 2007-11-30 |
KR20080003925A (ko) | 2008-01-08 |
EP1875130A1 (fr) | 2008-01-09 |
KR100919754B1 (ko) | 2009-10-07 |
ES2603405T3 (es) | 2017-02-27 |
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