EP0308300A1 - Combustion process in a fluidised bed and installation for carrying out the process - Google Patents
Combustion process in a fluidised bed and installation for carrying out the process Download PDFInfo
- Publication number
- EP0308300A1 EP0308300A1 EP88402256A EP88402256A EP0308300A1 EP 0308300 A1 EP0308300 A1 EP 0308300A1 EP 88402256 A EP88402256 A EP 88402256A EP 88402256 A EP88402256 A EP 88402256A EP 0308300 A1 EP0308300 A1 EP 0308300A1
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- EP
- European Patent Office
- Prior art keywords
- stage
- combustion
- gases
- fuel
- fluidized bed
- 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.)
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Classifications
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- 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
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- 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
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- 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
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
Definitions
- the present invention relates to solid fuel fireplaces in which combustion is carried out in two stages: a first stage where the fuel is burned in a fludized bed with a quantity of substoichiometric air and a second stage where the gases emerging from the fluidized bed and the fine particles of fuel which they entrain burn with secondary air admitted into the combustion chamber, at a certain height above the fluidized bed.
- the invention relates to fluidized bed fireplaces, the bottom of which consists of a grid, at least part of which is inclined and in which the major part of the ash is removed at the upper end of the grid, either by mechanical means. in the form of bottom ash, if the temperature within the bed is sufficient to allow agglomeration of the ashes, either by overflow (French patent N ° 83.16290) or defluidization (French patent N ° 82.10385), in the opposite case.
- the ashes and soot which are entrained by the gases emerging from the bed are separated in one or more dust collectors and reinjected into the fluidized bed.
- the soot hardly burns in the fluidized bed, which is reducing, and can be trapped by the ashes and evacuated with them, which decreases the combustion efficiency.
- the present invention improves the combustion efficiency of fireplaces of this type. It consists of recycle in the second stage of combustion the soot and fly ash separated from the smoke, with the exception of a purge flow which makes it possible to eliminate the fly ash. It thus establishes a closed circuit circulation with several passages of soot in the area where the second stage of combustion takes place which allows to obtain an almost complete combustion.
- the particles separated from the fumes can be reinjected pneumatically, either by means of secondary air, or by an independent circuit.
- the invention also relates to an installation comprising a fluidized bed hearth of the type concerned and at least one dust collector traversed by the fumes, characterized in that it further comprises means for re-injecting into the combustion chamber, at level of the secondary air intake nozzles or above them, the solid particles separated from the fumes in said dust collector, and a purge circuit making it possible to eliminate a part of said particles.
- the reference numbers 1 and 2 represent reactors, 3 and 4 are convection heat exchangers, 5 is a primary dust collector and 6 is a final dust collector.
- the fuel introduced in 7 is fluidized by the air admitted in 8, under an inclined and gas-permeable floor.
- the ash produced by combustion in a fluidized bed is removed at 9 by overflow or defluidization above the upper end of the hearth, or extracted from the bed, in the form of bottom ash, by a conveyor if the temperature of the bed is sufficient for cause agglomeration of ash.
- the air flow blown at 8 is less than the stoichiometric flow, so that the gases produced which emerge from the bed are reducing.
- These gases, which are charged with fly ash and fine fuel particles, are introduced into reactor 2 where secondary air is also introduced, at 11, and if necessary a desulfurizing agent, such as limestone or lime, in finely divided form, at 13.
- the gases and the fuel particles which they transport burn with the secondary air to produce hot gases which successively pass through the exchanger 3, the dust collector 5, the exchanger 4 and the dust collector 6.
- the dust separated from the gases in the dust collectors 5 and 6 is returned to the reactor 2, at 15, except for a small fraction which is withdrawn at 17, to remove the ash and the reaction products of desulfurization.
- This boiler comprises a fluidized bed hearth 10, the bottom of which is formed by the upper strand, inclined with an endless chain 12. This bottom constitutes the bottom of a vertical chamber 18 whose walls and ceiling are formed, so known, of sealed tube panels, which are connected, at their upper end, to a vapor collecting balloon 20.
- the chamber 18 is connected to a horizontal chamber 22 in which are placed bundles of tubes 24 connected to the balloon 20 and tubes 26 where the vapor collected in the balloon 20 is superheated.
- the fumes produced in chamber 18 and leaving chamber 22 pass successively through a primary dust collector 28, constituted for example by a multicyclone, an exchanger 30, which could be an economizer, and a final dust collector 32, for example a bag filter.
- the air necessary for the combustion of the fuel is partly blown through the chain 12 to ensure the fluidization of the solid fuel and its partial combustion, and partly at a certain distance above the bed, by means of nozzles 34.
- the solid fuel is introduced through a chute 14 into the deepest part of the bed and a desulfurizing agent is injected at 36 into the upper part of the combustion chamber 18.
- the dust collected in the chamber 22, in the dust collectors 28 and 32 and in the exchanger 30 are reinjected, for example pneumatically, at 37 into the combustion chamber 18, at the level of the nozzles 34 or above the latter; we can, in particular, use secondary air to reinject the dust.
- Part of the dust is drawn off, continuously or discontinuously, by a purge circuit 38 to remove the products of the desulfurization reaction and the ashes.
- the circulation rate - ratio of the flow rate of the circulating charge to the purge flow rate - is of the order of 10. Provision may be made for reinjecting the dust at two different levels according to the operating mode of the boiler: a lower level for the walking at low load and a higher level for walking at high load.
- the combustion in the fluidized bed 10 takes place at a temperature sufficient to allow the ash to agglomerate in the form of bottom ash, these settle on the chain 12 and are discharged through it at its upper end. If the temperature of the fluidized bed is not sufficient to cause agglomeration of the ashes, they are evacuated by overflow or defluidization at the upper end of the hearth. In all cases, most of the ash is thus extracted from the bed, the rest being entrained by the gases emerging from the bed. Combustible gases emerging from the bed and fines fuel particles entrained by them, with the fly ash, burn above the bed 10 with the secondary air introduced by the nozzles 34.
- the fluidized bed 10 constitutes the first stage of a two-stage reactor, the second of which is similar to a circulating fluidized bed and where the desulphurization and combustion of the soot are carried out entirely.
- it is distinguished from conventional circulating fluidized beds by the fact that it does not have a fluidization grid and that the circulating charge is much more reduced, for a given rate of circulation of the desulfurizing agent, since the major part of the ashes is extracted from the bed 10 in the form of bottom ash, so that the particles are kept in suspension in the gases in this second stage.
- the content of desulphurization products in the fraction extracted by the purge circuit 38 is significantly higher, which facilitates the subsequent treatment thereof; the dust concentration of the chambers 18 and 22 is lower and the walls of these chambers as well as the tubes of the bundles 24 and 26 are subjected to less severe erosion.
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- 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)
Abstract
Description
La présente invention concerne les foyers à combustible solide dans lesquels la combustion est effectuée en deux stades : un premier stade où le combustible est brûlé en lit fludisé avec une quantité d'air substoechiométrique et un second stade où les gaz se dégageant du lit fluidisé et les fines particules de combustible qu'ils entraînent brûlent avec de l'air secondaire admis dans la chambre de combustion, à une certaine hauteur au-dessus du lit fluidisé.The present invention relates to solid fuel fireplaces in which combustion is carried out in two stages: a first stage where the fuel is burned in a fludized bed with a quantity of substoichiometric air and a second stage where the gases emerging from the fluidized bed and the fine particles of fuel which they entrain burn with secondary air admitted into the combustion chamber, at a certain height above the fluidized bed.
Plus particulièrement l'invention concerne les foyers à lit fluidisé dont le fond est constitué par une grille dont une partie au moins est inclinée et dans lesquels la majeure partie des cendres est évacuée à l'extrémité supérieure de la grille, soit par des moyens mécaniques sous forme de mâchefers, si la température au sein du lit est suffisante pour permettre l'agglomération des cendres, soit par débordement (brevet français N° 83.16290) ou défluidisation (brevet français N° 82.10385), dans le cas contraire.More particularly, the invention relates to fluidized bed fireplaces, the bottom of which consists of a grid, at least part of which is inclined and in which the major part of the ash is removed at the upper end of the grid, either by mechanical means. in the form of bottom ash, if the temperature within the bed is sufficient to allow agglomeration of the ashes, either by overflow (French patent N ° 83.16290) or defluidization (French patent N ° 82.10385), in the opposite case.
Dans les foyers connus de ce type, les cendres et les suies qui sont entrainées par les gaz se dégageant du lit sont séparées dans un ou plusieurs dépoussiéreurs et réinjectées dans le lit fluidisé. Les suies brûlent difficilement dans le lit fluidisé, qui est réducteur, et peuvent être piégées par les cendres et évacuées avec celles-ci, ce qui diminue le rendement de combustion.In known fireplaces of this type, the ashes and soot which are entrained by the gases emerging from the bed are separated in one or more dust collectors and reinjected into the fluidized bed. The soot hardly burns in the fluidized bed, which is reducing, and can be trapped by the ashes and evacuated with them, which decreases the combustion efficiency.
La présente invention permet d'améliorer le rendement de combustion des foyers de ce type. Elle consiste à recycler au seconde stade de la combustion les suies et cendres volantes séparées des fumées, à l'exception d'un débit de purge qui permet d'éliminer les cendres volantes. Il s'établit ainsi une circulation en circuit fermé avec plusieurs passages des suies dans la zone où se déroule le second stade de la combustion qui permet d'obtenir une combustion quasi complète. Les particules séparées des fumées peuvent être réinjectées pneumatiquement, soit au moyen d'air secondaire, soit par un circuit indépendant.The present invention improves the combustion efficiency of fireplaces of this type. It consists of recycle in the second stage of combustion the soot and fly ash separated from the smoke, with the exception of a purge flow which makes it possible to eliminate the fly ash. It thus establishes a closed circuit circulation with several passages of soot in the area where the second stage of combustion takes place which allows to obtain an almost complete combustion. The particles separated from the fumes can be reinjected pneumatically, either by means of secondary air, or by an independent circuit.
Dans le cas où le combustible contient du soufre et où il est nécessaire de désulfurer les fumées avant de les rejeter à l'atmosphère, il faut aussi, dans les foyers connus, séparer des fumées les produits de la réaction de désulfuration, qui doivent être éliminés, et l'agent désulfurant n'ayant pas réagi, qui est recyclé dans une zone de la chambre de combustion où règne une température inférieurs à celle du lit fluidisé. Cela nécessite des moyens plus ou moins complexes et efficaces. Grâce à l'invention, il est possible de réinjecter l'agent désulfurant avec les suies et, par conséquent, de se dispenser de moyens pour les récupérer séparément. Dans ce cas, l'ensemble des solides séparés des fumées, à l'exception d'un débit de purge permettant d'éliminer les cendres volantes et les produits de la réaction de désulfuration, sera recyclé au second stade de la combustion, dans une zone favorable à la réaction de désulfuration. Si le foyer doit fonctionner à des régimes très diffé rents, on pourra prévoir de réinjecter les particules solides séparées des fumées à un premier niveau, proche de l'admission d'air secondaire, pour la marche à faible charge et à un niveau supérieur pour la marche à pleine charge.In the case where the fuel contains sulfur and it is necessary to desulfurize the fumes before discharging them into the atmosphere, it is also necessary, in known foci, to separate from the fumes the products of the desulfurization reaction, which must be removed, and the unreacted desulfurizing agent, which is recycled to an area of the combustion chamber where a temperature prevails below that of the fluidized bed. This requires more or less complex and effective means. Thanks to the invention, it is possible to reinject the desulphurizing agent with the soot and, consequently, to dispense with means for recovering it separately. In this case, all of the solids separated from the flue gases, with the exception of a purge flow making it possible to remove the fly ash and the products of the desulfurization reaction, will be recycled in the second stage of combustion, in a zone favorable to the desulfurization reaction. If the fireplace is to operate at very different regimes rents, provision may be made to reinject the solid particles separated from the smoke at a first level, close to the secondary air intake, for walking at low load and at a higher level for walking at full load.
L'invention a également pour objet une installation comportant un foyer à lit fluidisé du type concerné et au moins un dépoussiéreur traversé par les fumées, caractérisée en ce qu'elle comporte, en outre, des moyens pour réinjecter dans la chambre de combustion, au niveau des buses d'admission d'air secondaire ou au-dessus de celles-ci, les particules solides séparées des fumées dans ledit dépoussiéreur, et un circuit de purge permettant d'éliminer une partie desdites particules.The invention also relates to an installation comprising a fluidized bed hearth of the type concerned and at least one dust collector traversed by the fumes, characterized in that it further comprises means for re-injecting into the combustion chamber, at level of the secondary air intake nozzles or above them, the solid particles separated from the fumes in said dust collector, and a purge circuit making it possible to eliminate a part of said particles.
D'autres caractéristiques de l'invention apparaitront à la lecture de la description qui suit et se réfère au dessin l'accompagnant qui montre, à titre d'exemple non limitatif un mode de réalisation de l'invention et sur lequel :
- La figure 1 est un schéma illustrant le procédé de l'invention ; et
- La figure 2 est une représentation schématique d'une chaudière équipée d'un foyer conforme à l'invention.
- Figure 1 is a diagram illustrating the method of the invention; and
- Figure 2 is a schematic representation of a boiler equipped with a fireplace according to the invention.
Sur le schéma de la figure 1, les numéros de référence 1 et 2 représentent des réacteurs, 3 et 4 sont des échangeurs de chaleur à convection, 5 est un dépoussiéreur primaire et 6 un dépoussiéreur final.In the diagram of FIG. 1, the
Dans le réacteur 1, le combustible introduit en 7 est fluidisé par l'air admis en 8, sous une sole inclinée et perméable au gaz. Les cendres produites par la combustion en lit fluidisé sont évacuées en 9 par débordement ou défluidisation au-dessus de l'extrémité supérieure de la sole, ou extraites du lit, sous forme de mâchefers, par un transporteur si la température du lit est suffisante pour provoquer l'agglomération des cendres. Le débit d'air insufflé en 8 est inférieur au débit stoechiométrique, de sorte que les gaz produits qui se dégagent du lit sont réducteurs. Ces gaz, qui sont chargés de cendres volantes et de fines particules de combustible, sont introduits dans le réacteur 2 où on introduit également de l'air secondaire, en 11, et le cas échéant un agent désulfurant, tel que du calcaire ou de la chaux, sous forme finement divisée, en 13. Les gaz et les particules de combustible qu'ils transportent brûlent avec l'air secondaire pour produire des gaz chauds qui traversent successivement l'échangeur 3, le dépoussiéreur 5, l'échangeur 4 et le dépoussiéreur 6. Les poussières séparées des gaz dans les dépoussiéreurs 5 et 6 sont renvoyées dans le réacteur 2, en 15, à l'exception d'une faible fraction qui est soutirée en 17, pour éliminer les cendres et les produits de la réaction de désulfuration. En contrôlant le débit des poussières réinjectées en 15, on maintient la charge circulante égale à plusieurs fois le débit de purge, de sorte que chaque particule d'agent désulfurant et de combustible passe plusieurs fois dans le réacteur 2 ce qui permet d'obtenir de très bons rendements de combustion et de désulfuration.In reactor 1, the fuel introduced in 7 is fluidized by the air admitted in 8, under an inclined and gas-permeable floor. The ash produced by combustion in a fluidized bed is removed at 9 by overflow or defluidization above the upper end of the hearth, or extracted from the bed, in the form of bottom ash, by a conveyor if the temperature of the bed is sufficient for cause agglomeration of ash. The air flow blown at 8 is less than the stoichiometric flow, so that the gases produced which emerge from the bed are reducing. These gases, which are charged with fly ash and fine fuel particles, are introduced into
Dans la chaudière de la figure 2, les deux zones de combustion sont superposées, sans séparation, dans une même enceinte. Cette chaudière comporte un foyer à lit fluidisé 10 dont la sole est constituée par le brin supérieur, incliné d'une chaîne sans fin 12. Cette sole constitue le fond d'une chambre verticale 18 dont les parois et le plafond sont formés, de manière connue, de panneaux de tubes étanches, qui sont raccordés, par leur extrémité supérieure, à un ballon collecteur de vapeur 20. La chambre 18 est raccordée à une chambre horizontale 22 dans laquelle sont placés des faisceaux de tubes 24 raccordés au ballon 20 et de tubes 26 où la vapeur collectée dans le ballon 20 est surchauffeé. Les fumées produites dans la chambre 18 et sortant de la chambre 22 traversent successivement un dépoussiéreur primaire 28, constitué par exemple par un multicyclone, un échangeur 30, qui pourra être un économiseur, et un dépoussiéreur final 32, par exemple un filtre à manches.In the boiler of FIG. 2, the two combustion zones are superimposed, without separation, in the same enclosure. This boiler comprises a fluidized bed hearth 10, the bottom of which is formed by the upper strand, inclined with an
L'air nécessaire à la combustion du combustible est en partie insufflé à travers la chaîne 12 pour assurer la fluidisation du combustible solide et sa combustion partielle, et en partie à une certaine distance au-dessus du lit, au moyen de buses 34.The air necessary for the combustion of the fuel is partly blown through the
Le combustible solide est introduit par une goulotte 14 dans la partie la plus profonde du lit et un agent désulfurant est injecté en 36 dans la partie supérieure de la chambre de combustion 18.The solid fuel is introduced through a chute 14 into the deepest part of the bed and a desulfurizing agent is injected at 36 into the upper part of the
Les poussières recueillies dans la chambre 22, dans les dépoussiéreurs 28 et 32 et dans l'échangeur 30 sont réinjectées, par exemple pneumatiquement, en 37 dans la chambre de combustion 18, au niveau des buses 34 ou audessus de celle-ci ; on pourra, en particulier, utiliser l'air secondaire pour réinjecter les poussières. Une partie des poussières est soutirée, en continu ou en discontinu, par un circuit de purge 38 pour éliminer les produits de la réaction de désulfuration et les cendres. Le taux de circulation - rapport du débit de la charge circulante au débit de purge - est de l'ordre de 10. On pourra prévoir de réinjecter les poussières à deux niveaux différents suivant le régime de marche de la chaudière : un niveau inférieur pour la marche à faible charge et un niveau supérieur pour la marche à forte charge.The dust collected in the
Si la combustion dans le lit fluidisé 10 s'effectue à une température suffisante pour permettre l'agglomération des cendres sous forme de mâchefers, ceux-ci se déposent sur la chaîne 12 et sont évacués par celle-ci à son extrémité supérieure. Si la température du lit fluidisé n'est pas suffisante pour provoquer l'agglomération des cendres, celles-ci sont évacuées par débordement ou défluidisation à l'extrémité supérieure de la sole. Dans tous les cas, c'est la majeure partie des cendres est ainsi extraite du lit, le reste étant entrainée par les gaz se dégageant du lit. Les gaz combustibles se dégageant du lit et les fines particules de combustible entraînées par ceux-ci, avec les cendres volantes, brûlent au-dessus du lit 10 avec l'air secondaire introduit par les buses 34.If the combustion in the fluidized bed 10 takes place at a temperature sufficient to allow the ash to agglomerate in the form of bottom ash, these settle on the
On peut considérer que le lit fluidisé 10 constitue le premier étage d'un réacteur à deux étages dont le second s'apparente à un lit fluidisé circulant et où s'effectue en totalité la désulfuration et la combustion des suies. Il se distingue cependant des lits fluidisés circulants classiques par le fait qu'il ne comporte pas de grille de fluidisation et que la charge circulante est beaucoup plus réduite, pour un taux de circulation donné de l'agent désulfurant, puisque la majeure partie des cendres est extraite du lit 10 sous forme de mâchefers, de sorte que les particules sont maintenues en suspension dans les gaz dans ce second étage. En conséquence, la teneur en produits de la désulfuration de la fraction extraite par le circuit de purge 38 est nettement plus élevée, ce qui facilite le traitement ultérieur de celle-ci; la concentration en poussières des chambres 18 et 22 est inférieure et les parois de ces chambres ainsi que les tubes des faisceaux 24 et 26 sont soumis à une érosion moins sévère.It can be considered that the fluidized bed 10 constitutes the first stage of a two-stage reactor, the second of which is similar to a circulating fluidized bed and where the desulphurization and combustion of the soot are carried out entirely. However, it is distinguished from conventional circulating fluidized beds by the fact that it does not have a fluidization grid and that the circulating charge is much more reduced, for a given rate of circulation of the desulfurizing agent, since the major part of the ashes is extracted from the bed 10 in the form of bottom ash, so that the particles are kept in suspension in the gases in this second stage. Consequently, the content of desulphurization products in the fraction extracted by the
Il est bien entendu que toutes les modifications qui peuvent être apportées aux modes de réalisation décrits par la substitution de moyens équivalents entrent dans le cadre de l'invention.It is understood that all the modifications which can be made to the embodiments described by the substitution of equivalent means are within the scope of the invention.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8712680A FR2620517B1 (en) | 1987-09-14 | 1987-09-14 | FLUIDIZED BED COMBUSTION PROCESS AND INSTALLATION FOR CARRYING OUT SAID METHOD |
FR8712680 | 1987-09-14 |
Publications (2)
Publication Number | Publication Date |
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EP0308300A1 true EP0308300A1 (en) | 1989-03-22 |
EP0308300B1 EP0308300B1 (en) | 1993-01-07 |
Family
ID=9354853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88402256A Expired - Lifetime EP0308300B1 (en) | 1987-09-14 | 1988-09-08 | Combustion process in a fluidised bed and installation for carrying out the process |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0308300B1 (en) |
KR (1) | KR960010317B1 (en) |
DE (1) | DE3877298T2 (en) |
ES (1) | ES2038325T3 (en) |
FR (1) | FR2620517B1 (en) |
IN (1) | IN171723B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993018341A1 (en) * | 1992-03-05 | 1993-09-16 | Technische Universiteit Delft | Method and apparatus for combusting a carbonaceous material |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10415825B2 (en) * | 2016-06-07 | 2019-09-17 | The Babcock & Wilcox Company | Methods of generating energy from cellulosic biofuel waste |
CN114234178B (en) * | 2021-11-02 | 2022-07-12 | 平湖弘欣热电有限公司 | Fly ash recirculation system of fluidized bed boiler |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2323101A1 (en) * | 1975-09-05 | 1977-04-01 | Metallgesellschaft Ag | PROCESS FOR THE COMBUSTION OF MATERIALS CONTAINING CARBON |
EP0033808A1 (en) * | 1979-12-26 | 1981-08-19 | Battelle Development Corporation | NOx reduction in multisolid fluidized bed combustors |
WO1986003986A1 (en) * | 1985-01-11 | 1986-07-17 | A. Ahlstrom Corporation | Method and apparatus for separating solid particles from flue gases in a circulating fluidized bed reactor |
FR2583305A1 (en) * | 1985-06-18 | 1986-12-19 | Fives Cail Babcock | Process for desulphurising gases originating from the hearth of a boiler and plant for implementing this process. |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0206066B1 (en) * | 1985-06-12 | 1993-03-17 | Metallgesellschaft Ag | Circulating fluid-bed combustion device |
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1987
- 1987-09-14 FR FR8712680A patent/FR2620517B1/en not_active Expired
-
1988
- 1988-09-08 DE DE8888402256T patent/DE3877298T2/en not_active Expired - Lifetime
- 1988-09-08 ES ES198888402256T patent/ES2038325T3/en not_active Expired - Lifetime
- 1988-09-08 EP EP88402256A patent/EP0308300B1/en not_active Expired - Lifetime
- 1988-09-13 IN IN644/MAS/88A patent/IN171723B/en unknown
- 1988-09-14 KR KR1019880011846A patent/KR960010317B1/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2323101A1 (en) * | 1975-09-05 | 1977-04-01 | Metallgesellschaft Ag | PROCESS FOR THE COMBUSTION OF MATERIALS CONTAINING CARBON |
EP0033808A1 (en) * | 1979-12-26 | 1981-08-19 | Battelle Development Corporation | NOx reduction in multisolid fluidized bed combustors |
WO1986003986A1 (en) * | 1985-01-11 | 1986-07-17 | A. Ahlstrom Corporation | Method and apparatus for separating solid particles from flue gases in a circulating fluidized bed reactor |
FR2583305A1 (en) * | 1985-06-18 | 1986-12-19 | Fives Cail Babcock | Process for desulphurising gases originating from the hearth of a boiler and plant for implementing this process. |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993018341A1 (en) * | 1992-03-05 | 1993-09-16 | Technische Universiteit Delft | Method and apparatus for combusting a carbonaceous material |
Also Published As
Publication number | Publication date |
---|---|
DE3877298D1 (en) | 1993-02-18 |
FR2620517A1 (en) | 1989-03-17 |
EP0308300B1 (en) | 1993-01-07 |
IN171723B (en) | 1992-12-19 |
KR890005454A (en) | 1989-05-15 |
DE3877298T2 (en) | 1993-08-05 |
ES2038325T3 (en) | 1993-07-16 |
FR2620517B1 (en) | 1989-12-22 |
KR960010317B1 (en) | 1996-07-30 |
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